Keep the raw folder name in an explorer window's data-name

update_window_path() and refresh_item_container() wrote the HTML-encoded
name there, so after navigating into "R&D" the tab title and the publish
dialog showed "R&D". A newly opened window already held the raw name.

doc/embedding-app-browser.md

@@ -259,6 +259,39 @@ no user to name), puter.js opens the dashboard's upgrade page in a new tab with
 what was refused, through a consent dialog when the click has expired or the
 tab is blocked, and `requestUpgrade()` resolves `{ upgraded: false }`.
 
+## Email confirmation
+
+`GET /embed/request-email-confirmation` walks a first-party page's user through
+confirming their email, served like the upgrade: the GUI shell with the same
+framing rules, redirects and `no-store`, run only when framed by an allowed
+page. puter.js frames it on a signed-in first-party page for
+`puter.ui.requestEmailConfirmation()`. Inside an app the desktop shows the same
+windows over the app instead.
+
+Like the upgrade, the frame covers the page with no box or close button, over a
+transparent GUI page, and its fragment names `user`. Escape closes it, on the
+page or on the save-account or code window. On a window, Escape closes that
+window as its close button does, so a code already sent still answers. The GUI
+reports `unavailable` unless its session belongs to `user` and the account has
+no phone, card or password check waiting.
+An email check is fine: the boot skips its own email gate for this action, so
+the user gets one code window they can close.
+
+The GUI then runs `ensureConfirmedEmail` (`src/gui/src/helpers/ensureConfirmedEmail.js`),
+which the desktop's handler uses too: a temporary account gets the save-account
+window first, then an unconfirmed email gets the code window, each at most
+once. When the page's whoami already reads the email as confirmed,
+`requestEmailConfirmation()` resolves `{ response: true }` without framing
+anything, and a confirmation in the frame marks that whoami confirmed for the
+calls after it. An email the GUI reads as confirmed shows nothing. Before
+opening a window the GUI waits for the frame to have a viewport, as the upgrade
+does. It then posts
+`{ msg: 'puterPopupFrame', state: 'closed', confirmed }`, and
+`requestEmailConfirmation()` resolves `{ response: confirmed }`, the field an
+app reads from the desktop's answer. A call made while the frame shows settles
+with it. A frame that is refused, never ready, or `unavailable` resolves
+`{ response: false }`, since there's no popup to fall back to.
+
 ## Checks
 
 Run the GUI component/browser tests (with the SDK bundle built and Playwright

src/backend/clients/s3/S3Client.test.ts

@@ -21,6 +21,8 @@
 import { GetObjectCommand } from '@aws-sdk/client-s3';
 import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
 import { existsSync } from 'node:fs';
+import { createServer, type Server } from 'node:http';
+import type { AddressInfo } from 'node:net';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
@@ -200,6 +202,77 @@ describe('S3Client — remote endpoint configuration', () => {
     });
 });
 
+describe('S3Client — bucket in another region', () => {
+    let server: Server;
+    let client: S3Client;
+    let signedRegions: string[];
+
+    // Answers like a bucket that lives in us-west-2: a request signed for any
+    // other region gets S3's 301 naming the bucket's region.
+    beforeEach(async () => {
+        signedRegions = [];
+        server = createServer((req, res) => {
+            const region =
+                /Credential=[^/]+\/\d{8}\/([^/]+)\//.exec(
+                    req.headers.authorization ?? '',
+                )?.[1] ?? '';
+            signedRegions.push(region);
+            if (region !== 'us-west-2') {
+                res.writeHead(301, {
+                    'content-type': 'application/xml',
+                    'x-amz-bucket-region': 'us-west-2',
+                });
+                res.end(
+                    '<?xml version="1.0" encoding="UTF-8"?><Error><Code>PermanentRedirect</Code><Message>The bucket you are attempting to access must be addressed using the specified endpoint.</Message></Error>',
+                );
+                return;
+            }
+            res.writeHead(200, {
+                'content-type': 'text/plain',
+                'content-length': '5',
+            });
+            res.end('hello');
+        });
+        await new Promise<void>((resolve) =>
+            server.listen(0, '127.0.0.1', resolve),
+        );
+        const { port } = server.address() as AddressInfo;
+        client = new S3Client({
+            port: 0,
+            extensions: [],
+            s3: {
+                s3Config: {
+                    endpoint: `http://127.0.0.1:${port}`,
+                    accessKeyId: 'fakeAccessKeyId',
+                    secretAccessKey: 'fakeSecretAccessKey',
+                    forcePathStyle: true,
+                },
+            },
+        } as unknown as IConfig);
+        await client.onServerStart();
+    });
+
+    afterEach(async () => {
+        await client.onServerShutdown();
+        server.closeAllConnections();
+        await new Promise<void>((resolve) => server.close(() => resolve()));
+    });
+
+    it("retries a read in the bucket's region when S3 redirects it", async () => {
+        const result = await client
+            .get('ap-northeast-2')
+            .send(
+                new GetObjectCommand({
+                    Bucket: 'other-bucket',
+                    Key: 'index.html',
+                }),
+            );
+
+        expect(await result.Body?.transformToString()).toBe('hello');
+        expect(signedRegions).toEqual(['ap-northeast-2', 'us-west-2']);
+    });
+});
+
 describe('S3Client — legacy storage migration', () => {
     let client: S3Client;
     let dir: string;

src/backend/clients/s3/S3Client.ts

@@ -235,6 +235,9 @@ export class S3Client extends PuterClient {
 
         const client = new AwsS3Client({
             region,
+            // Rows without a stored region are read with the server's own, so
+            // retry where S3's 301 says the bucket actually lives.
+            followRegionRedirects: true,
             requestStreamBufferSize: 32 * 1024,
             requestHandler: new NodeHttpHandler({
                 socketTimeout: 5000,

src/backend/controllers/homepage/HomepageController.ts

@@ -36,8 +36,9 @@ import type {
 
 /**
  * GUI popups a first-party page can show in a frame at `/embed/<action>`,
- * instead of opening `/action/<action>` in a window, and the upgrade dialog,
- * which it would otherwise open in a dashboard tab.
+ * instead of opening `/action/<action>` in a window, plus the upgrade dialog,
+ * which it would otherwise open in a dashboard tab, and the email confirmation,
+ * which it otherwise can't show.
  */
 export const FRAMED_POPUP_ACTIONS = [
     'sign-in',
@@ -45,6 +46,7 @@ export const FRAMED_POPUP_ACTIONS = [
     'show-save-file-picker',
     'show-directory-picker',
     'upgrade',
+    'request-email-confirmation',
 ] as const;
 
 /** Longest description/og:description/twitter:description on `/app/<name>`. */

src/backend/drivers/ai-chat/ChatCompletionDriver.test.ts

@@ -2222,3 +2222,166 @@ describe('ChatCompletionDriver.countTokens', () => {
         ).rejects.toMatchObject({ statusCode: 400 });
     });
 });
+
+describe('ChatCompletionDriver service speed', () => {
+    it.each([
+        [{ serviceSpeed: 'ultrafast' }, 'fast', 0.028],
+        [{ speed: 'fast' }, 'fast', 0.028],
+        [{ serviceSpeed: 'standard', speed: 'fast' }, 'standard', 0.014],
+    ] as const)('uses the Claude catalog rate card for %j', async (options, speed, cents) => {
+        const sent: Record<string, unknown>[] = [];
+        vi.stubGlobal('fetch', async (input: Request | string, init?: RequestInit) => {
+            const body = input instanceof Request
+                ? await input.clone().json()
+                : JSON.parse(String(init?.body));
+            sent.push(body);
+            return new Response(JSON.stringify({
+                id: 'claude-speed-test', type: 'message', role: 'assistant',
+                model: body.model, stop_reason: 'end_turn',
+                content: [{ type: 'text', text: 'OK' }],
+                usage: { input_tokens: 10, output_tokens: 5, speed },
+            }), { headers: { 'content-type': 'application/json' } });
+        });
+        const d = new ChatCompletionDriver(
+            { providers: { claude: { apiKey: 'test-key' }, ollama: { enabled: false } } } as never,
+            server.clients, server.stores, server.services,
+        );
+        try {
+            await d.onServerStart();
+            const result = await withTestActor(() => d.complete({
+                model: 'claude-opus-5-5', provider: 'claude',
+                messages: [{ role: 'user', content: 'Hello' }],
+                fallback: false, max_tokens: 32, normalize: true, ...options,
+            }));
+            expect(sent).toHaveLength(1);
+            expect(sent[0]!.speed).toBe(speed === 'fast' ? 'fast' : undefined);
+            expect(result).toMatchObject({
+                message: { content: 'OK' }, usage: { usd_cents: cents },
+            });
+        } finally {
+            d.onServerShutdown();
+            vi.unstubAllGlobals();
+        }
+    });
+
+    it.each([
+        null, false, true, 0, 1, -1, NaN, Infinity, '', 'invalid', 'FAST',
+        'fast ', ' fast', 'ultraFast', [], ['fast'], {}, { speed: 'fast' },
+        { toString: 'fast' },
+    ])('rejects invalid speed %j before sending a request', async (serviceSpeed) => {
+        await expect(
+            withTestActor(() =>
+                driver.complete({
+                    model: 'fake',
+                    messages: [{ role: 'user', content: 'Hello' }],
+                    serviceSpeed: serviceSpeed as never,
+                }),
+            ),
+        ).rejects.toMatchObject({
+            statusCode: 400,
+            legacyCode: 'invalid_service_speed',
+        });
+    });
+
+    it.each([
+        ['openai-responses', true],
+        ['openai-responses', false],
+        ['openai-completion', false],
+    ] as const)(
+        'settles unavailable tiers at standard rates on %s with provider fallback disabled (admission rejection: %s)',
+        async (provider, rejectFast) => {
+            const sent: Record<string, unknown>[] = [];
+            vi.stubGlobal(
+                'fetch',
+                async (_input: unknown, init?: RequestInit) => {
+                    const body =
+                        _input instanceof Request
+                            ? await _input.clone().json()
+                            : JSON.parse(String(init?.body));
+                    sent.push(body);
+                    if (rejectFast && body.service_tier !== 'default') {
+                        return new Response(
+                            JSON.stringify({
+                                error: {
+                                    message: `${body.service_tier} service_tier capacity unavailable`,
+                                    type: 'invalid_request_error',
+                                },
+                            }),
+                            {
+                                status: 400,
+                                headers: { 'content-type': 'application/json' },
+                            },
+                        );
+                    }
+                    return new Response(
+                        JSON.stringify({
+                            id: 'response-test',
+                            object: 'response',
+                            model: body.model,
+                            status: 'completed',
+                            service_tier: 'default',
+                            output: [
+                                {
+                                    type: 'message',
+                                    role: 'assistant',
+                                    content: [
+                                        { type: 'output_text', text: 'OK' },
+                                    ],
+                                },
+                            ],
+                            usage: {
+                                input_tokens: 10,
+                                output_tokens: 2,
+                                input_tokens_details: { cached_tokens: 0 },
+                            },
+                        }),
+                        { headers: { 'content-type': 'application/json' } },
+                    );
+                },
+            );
+            const d = new ChatCompletionDriver(
+                {
+                    providers: {
+                        'openai-completion': { apiKey: 'test-key' },
+                        ollama: { enabled: false },
+                    },
+                } as never,
+                server.clients,
+                server.stores,
+                server.services,
+            );
+            try {
+                await d.onServerStart();
+                const result = (await withTestActor(() =>
+                    d.complete({
+                        model: 'gpt-6.1-sol',
+                        provider,
+                        messages: [{ role: 'user', content: 'Hello' }],
+                        serviceSpeed: 'ultrafast',
+                        fallback: false,
+                        max_tokens: 32,
+                        normalize: true,
+                    }),
+                )) as {
+                    message: { content: string };
+                    usageDetails: { serviceSpeed: string };
+                    usage: { usd_cents: number };
+                };
+                expect(sent.map((body) => body.service_tier)).toEqual(
+                    rejectFast
+                        ? ['ultrafast', 'priority', 'default']
+                        : ['ultrafast'],
+                );
+                expect(sent.every((body) => body.model === 'gpt-6.1-sol')).toBe(
+                    true,
+                );
+                expect(result.message.content).toBe('OK');
+                expect(result.usageDetails.serviceSpeed).toBe('standard');
+                expect(result.usage.usd_cents).toBeCloseTo(0.004, 8);
+            } finally {
+                d.onServerShutdown();
+                vi.unstubAllGlobals();
+            }
+        },
+    );
+});

src/backend/drivers/ai-chat/ChatCompletionDriver.ts

@@ -78,6 +78,11 @@ import type {
     UsageDetails,
 } from './types.js';
 import { normalize_tools_object } from './utils/FunctionCalling.js';
+import {
+    selectServiceSpeed,
+    lowerServiceSpeed,
+    isServiceSpeedUnavailable,
+} from './utils/serviceSpeed.js';
 import {
     messagesHavePuterPaths,
     modelSupportsModality,
@@ -674,6 +679,16 @@ export class ChatCompletionDriver extends PuterDriver {
     }
 
     async complete(args: ICompleteArguments): Promise<IChatCompleteResult> {
+        if (
+            args.serviceSpeed !== undefined &&
+            !['standard', 'fast', 'ultrafast'].includes(args.serviceSpeed)
+        ) {
+            throw new HttpError(
+                400,
+                'serviceSpeed must be standard, fast, or ultrafast',
+                { legacyCode: 'invalid_service_speed' },
+            );
+        }
         const abortSignal = Context.get('abortSignal');
         abortSignal?.throwIfAborted();
         const actor = Context.get('actor');
@@ -700,15 +715,16 @@ export class ChatCompletionDriver extends PuterDriver {
             args.model = this.#providers[intendedProvider].getDefaultModel();
         }
 
-        let model = await this.#resolveLoadedModel(
+        const initialModel = await this.#resolveLoadedModel(
             args.model,
             intendedProvider,
         );
-        if (!model) {
+        if (!initialModel) {
             throw new HttpError(400, `Model not found: ${args.model}`, {
                 legacyCode: 'bad_request',
             });
         }
+        let model: IChatModel = initialModel;
         // A pinned provider without a route for the model normally resolves
         // to another vendor; with `fallback: false` that is the one thing the
         // caller asked us not to do.
@@ -840,18 +856,6 @@ export class ChatCompletionDriver extends PuterDriver {
         // The instant the current attempt is priced at, from its hold to its
         // charge, so a rate change mid-request can't split the two.
         let pricingTime = new Date();
-        if (!useFakeProvider) {
-            ({
-                hold,
-                fundsCap,
-                costFactor,
-                promptTokenEstimate: attemptPromptTokenEstimate,
-            } = await this.#applyCreditGate(actor, model, args, {
-                promptTokenEstimate,
-                requestedMaxTokens,
-                pricingTime,
-            }));
-        }
 
         // First attempt
         const provider = this.#providers[model.provider!];
@@ -899,24 +903,134 @@ export class ChatCompletionDriver extends PuterDriver {
             return attempt;
         };
 
+        let variantSpeed: ICompleteArguments['serviceSpeed'];
+        let creditGateError: unknown;
         const runAttempt = async (
             attemptProvider: IChatProvider,
-            attemptModel: IChatModel,
+            baseModel: IChatModel,
         ) => {
-            if (!useFakeProvider) {
-                await this.#resolvePuterPaths(attemptProvider, args, actor);
-            }
-            // Last point where a caller who left costs nothing.
-            abortSignal?.throwIfAborted();
-            return attemptProvider.complete(
-                {
-                    ...args,
+            const offers =
+                args.serviceSpeed !== undefined &&
+                args.serviceSpeed !== 'standard'
+                    ? ((await attemptProvider.serviceSpeedModels?.(
+                          baseModel,
+                      )) ?? {})
+                    : {};
+            let requestedSpeed =
+                args.serviceSpeed ??
+                (baseModel.provider === 'claude' && args.speed === 'fast'
+                    ? 'fast'
+                    : undefined);
+            for (;;) {
+                const selection = selectServiceSpeed(
+                    baseModel,
+                    { ...args, serviceSpeed: requestedSpeed },
+                    (id) => {
+                        const variant = this.#resolveModel(
+                            id,
+                            baseModel.provider!,
+                        );
+                        return variant &&
+                            variant.provider === baseModel.provider
+                            ? variant
+                            : undefined;
+                    },
+                    offers,
+                );
+                const attemptModel = selection.model;
+                const requestArgs = {
+                    ...selection.args,
                     model: attemptModel.id,
                     provider: attemptModel.provider,
-                },
-                this.#catalogEntries.get(attemptModel),
-                pricingTime,
-            );
+                };
+                const catalogModel = this.#resolveModel(
+                    attemptModel.id,
+                    attemptModel.provider!,
+                );
+                const rawModel = this.#catalogEntries.get(
+                    catalogModel ?? baseModel,
+                );
+                const snapshot = rawModel
+                    ? {
+                          ...rawModel,
+                          costs: attemptModel.costs,
+                          pricingOverrides: attemptModel.pricingOverrides,
+                          serviceSpeedPricing: attemptModel.serviceSpeedPricing,
+                      }
+                    : attemptModel;
+                if (!useFakeProvider) {
+                    try {
+                        ({
+                            hold,
+                            fundsCap,
+                            costFactor,
+                            promptTokenEstimate: attemptPromptTokenEstimate,
+                        } = await this.#applyCreditGate(
+                            actor,
+                            attemptModel,
+                            requestArgs,
+                            {
+                                promptTokenEstimate,
+                                requestedMaxTokens,
+                                pricingTime,
+                            },
+                        ));
+                    } catch (error) {
+                        creditGateError = error;
+                        throw error;
+                    }
+                    await this.#resolvePuterPaths(
+                        attemptProvider,
+                        requestArgs,
+                        actor,
+                    );
+                }
+                abortSignal?.throwIfAborted();
+                try {
+                    const result = await attemptProvider.complete(
+                        requestArgs,
+                        snapshot,
+                        pricingTime,
+                    );
+                    model = attemptModel;
+                    variantSpeed =
+                        attemptModel.id !== baseModel.id
+                            ? selection.speed
+                            : undefined;
+                    if (
+                        args.serviceSpeed !== undefined &&
+                        'message' in result
+                    ) {
+                        const messageResult = result as IChatMessageResult;
+                        const details =
+                            messageResult.usageDetails ??
+                            usageDetailsFromUsage(messageResult.usage, model);
+                        messageResult.usageDetails = {
+                            ...details,
+                            serviceSpeed:
+                                variantSpeed ??
+                                details?.serviceSpeed ??
+                                details?.speed ??
+                                'standard',
+                        };
+                    }
+                    return result;
+                } catch (error) {
+                    await hold.release();
+                    hold = NO_CREDIT_HOLD;
+                    if (
+                        args.serviceSpeed === undefined ||
+                        selection.speed === 'standard' ||
+                        !isServiceSpeedUnavailable(
+                            error,
+                            attemptModel.id !== baseModel.id,
+                        )
+                    )
+                        throw error;
+                    requestedSpeed = lowerServiceSpeed(selection.speed);
+                    pricingTime = new Date();
+                }
+            }
         };
 
         try {
@@ -984,29 +1098,17 @@ export class ChatCompletionDriver extends PuterDriver {
                 // The previous attempt released its hold when it failed, so
                 // this one starts from nothing held.
                 pricingTime = new Date();
-                if (!useFakeProvider) {
-                    ({
-                        hold,
-                        fundsCap,
-                        costFactor,
-                        promptTokenEstimate: attemptPromptTokenEstimate,
-                    } = await this.#applyCreditGate(actor, fallback, args, {
-                        promptTokenEstimate,
-                        requestedMaxTokens,
-                        pricingTime,
-                    }));
-                }
 
                 tried.add(routeId(fallback.provider!, fallback.id));
 
                 try {
                     res = await runAttempt(fbProvider, fallback);
-                    model = fallback;
                     lastError = null;
                     console.warn(
                         `[ai-chat] fallback served (${completionId}, ${first.provider}:${first.model} -> ${fallback.provider}:${fallback.id}, first ${first.status ?? 'none'}${first.upstreamType ? `/${first.upstreamType}` : ''})`,
                     );
                 } catch (fbErr) {
+                    if (fbErr === creditGateError) throw fbErr;
                     await hold.release();
                     hold = NO_CREDIT_HOLD;
                     abortSignal?.throwIfAborted();
@@ -1162,6 +1264,20 @@ export class ChatCompletionDriver extends PuterDriver {
                         usageDetailsFromUsage(usage, model),
                     );
                 }
+                if (
+                    args.serviceSpeed !== undefined &&
+                    chatStream.usageDetails
+                ) {
+                    const details = chatStream.usageDetails;
+                    chatStream.setUsageDetails({
+                        ...details,
+                        serviceSpeed:
+                            variantSpeed ??
+                            details.serviceSpeed ??
+                            details.speed ??
+                            'standard',
+                    });
+                }
                 withClaudeThinkingTokens(
                     enrichedUsage,
                     model,
@@ -1474,12 +1590,7 @@ export class ChatCompletionDriver extends PuterDriver {
         const metering = this.services.metering;
         const { requestedMaxTokens, pricingTime } = estimates;
         let { promptTokenEstimate } = estimates;
-        // A provider can name its own cost keys for this request (Claude's
-        // fast-mode rate card), cap its output, and size an extra reservation
-        // the per-token math can't see (a web-search/advisor tool that could
-        // run several times before the model answers) — the same clamps it
-        // applies when building the request, so the hold and the request
-        // agree.
+        // Providers reserve tool calls using the same caps they send upstream.
         const pricing =
             this.#providers[model.provider!]?.requestPricing?.(args, model, {
                 promptTokenEstimate,

src/backend/drivers/ai-chat/providers/OpenAICompatProvider.ts

@@ -41,6 +41,7 @@ import {
     meterChatUsage,
     type MeterChatUsageOptions,
 } from '../utils/meterChatUsage.js';
+import { servedServiceSpeed } from '../utils/serviceSpeed.js';
 import { catalogPrice, costKeys } from '../utils/pricing.js';
 import { normalizeModelKey } from '../utils/modelRouting.js';
 import * as OpenAIUtil from '../utils/OpenAIUtil.js';
@@ -232,6 +233,8 @@ export class OpenAICompatProvider implements IChatProvider {
                   )
                 : {}),
         };
+        if (args.serviceSpeed !== undefined && args.service_tier !== undefined)
+            shared.service_tier = args.service_tier;
         const params = this.vendorParams(shared, args, model, actor);
 
         let pricingTime = attemptPricingTime ?? new Date();
@@ -271,15 +274,29 @@ export class OpenAICompatProvider implements IChatProvider {
                     source,
                     model,
                 );
-                if (usageDetails) source.setUsageDetails?.(usageDetails);
+                const serviceSpeed = servedServiceSpeed(source);
+                if (usageDetails)
+                    source.setUsageDetails?.({
+                        ...usageDetails,
+                        ...(args.serviceSpeed !== undefined
+                            ? { serviceSpeed }
+                            : {}),
+                    });
                 const metered = meterChatUsage(
                     this.#metering,
                     actor,
                     this.meteringModelKey(model.id),
                     model,
                     usage,
-                    { ...meterOptions, pricingTime },
+                    { ...meterOptions, pricingTime, serviceSpeed },
                 );
+                if (args.serviceSpeed !== undefined && !usageDetails) {
+                    const details = OpenAIUtil.usageDetailsFromTrackedUsage(
+                        metered.usage,
+                    );
+                    if (details)
+                        source.setUsageDetails?.({ ...details, serviceSpeed });
+                }
                 source.setUsageCosts(metered.costs);
                 return this.reportedUsage(metered.usage);
             },

src/backend/drivers/ai-chat/providers/alibaba/catalog.ts

@@ -174,6 +174,9 @@ export const mapAlibabaCatalogModel = (
             : undefined;
     return {
         ...existing,
+        serviceSpeedVariants: {
+            fast: id === 'glm-5.2' ? 'glm-5.2-fast-preview' : `${id}-prime`,
+        },
         id,
         puterId,
         name: raw.name ?? existing?.name ?? id,

src/backend/drivers/ai-chat/providers/alibaba/models.ts

@@ -37,6 +37,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-max-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 160,
@@ -60,6 +61,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -81,6 +83,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -102,6 +105,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.6-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 50,
@@ -123,6 +127,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.6-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 19,
@@ -143,6 +148,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 50,
@@ -164,6 +170,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-max-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -188,6 +195,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.8-max-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -210,6 +218,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.8-max-0902-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -234,6 +243,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 5,
@@ -257,6 +267,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3-coder-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30,
@@ -282,6 +293,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-397b-a17b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 60,
@@ -305,6 +317,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-122b-a10b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -328,6 +341,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-35b-a3b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 25,
@@ -351,6 +365,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-27b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30,
@@ -376,6 +391,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.6-35b-a3b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 24.8,
@@ -399,6 +415,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.6-27b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 60,
@@ -422,6 +439,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3-vl-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 20,
@@ -447,6 +465,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3-omni-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 43,
@@ -469,6 +488,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-mt-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 246,
@@ -491,6 +511,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-plus-2025-01-25-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -511,6 +532,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-plus-2025-04-28-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -531,6 +553,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-plus-2025-07-14-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -553,6 +576,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-plus-2025-12-01-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -574,6 +598,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-max-2026-05-20-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -594,6 +619,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-max-2026-06-08-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -614,6 +640,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-max-2026-05-17-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -635,6 +662,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-max-preview-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -657,6 +685,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-plus-2026-02-15-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -678,6 +707,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-plus-2026-04-20-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -700,6 +730,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 10,
@@ -722,6 +753,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.7-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 3,
@@ -743,6 +775,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.8-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 15,
@@ -765,6 +798,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.8-27b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 50,
@@ -785,6 +819,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.8-2.4t-a95b-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -809,6 +844,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-omni-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -832,6 +868,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.5-omni-plus-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 140,
@@ -855,6 +892,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen3.8-omni-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 15,
@@ -877,6 +915,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-mt-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 16,
@@ -897,6 +936,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'qwen-mt-lite-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 12,
@@ -919,6 +959,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'glm-5.1-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 140,
@@ -938,6 +979,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'glm-5.2-fast-preview' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 140,
@@ -958,6 +1000,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'glm-5.2-fast-preview-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 280,
@@ -981,6 +1024,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'deepseek-v4-flash-0731-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 44,
@@ -1003,6 +1047,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'deepseek-v4.1-flash-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30,
@@ -1023,6 +1068,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'deepseek-v4-pro-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 240,
@@ -1045,6 +1091,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'deepseek-v4-pro-0813-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 132,
@@ -1065,6 +1112,7 @@ export const ALIBABA_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'kimi-k2.7-code-prime' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 95,

src/backend/drivers/ai-chat/providers/azure/AzureChatProvider.ts

@@ -20,6 +20,10 @@
 import { HttpError } from '@heyputer/backend/src/core/http/HttpError.js';
 import { OpenAI } from 'openai';
 import { ChatCompletionCreateParams } from 'openai/resources/index.js';
+import {
+    serviceSpeedBillingModel,
+    servedServiceSpeed,
+} from '../../utils/serviceSpeed.js';
 import { Context } from '../../../../core/context.js';
 import type { FSService } from '../../../../services/fs/FSService.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
@@ -153,6 +157,7 @@ export class AzureChatProvider implements IChatProvider {
 
     async complete(
         params: ICompleteArguments,
+        resolved?: IChatModel,
     ): ReturnType<IChatProvider['complete']> {
         const {
             max_tokens,
@@ -180,7 +185,9 @@ export class AzureChatProvider implements IChatProvider {
                     { legacyCode: 'bad_request' },
                 );
             }
-            return await this.#responsesProvider.complete(params);
+            return await (resolved
+                ? this.#responsesProvider.complete(params, resolved)
+                : this.#responsesProvider.complete(params));
         }
         // Inline compaction is a Responses-API feature; chat.completions can't
         // express `context_management` or a `compaction` content block.
@@ -194,7 +201,9 @@ export class AzureChatProvider implements IChatProvider {
                     { legacyCode: 'bad_request' },
                 );
             }
-            return await this.#responsesProvider.complete(params);
+            return await (resolved
+                ? this.#responsesProvider.complete(params, resolved)
+                : this.#responsesProvider.complete(params));
         }
         // Validate messages
         if (!Array.isArray(messages)) {
@@ -207,9 +216,11 @@ export class AzureChatProvider implements IChatProvider {
         model = model ?? this.#defaultModel;
 
         const modelUsed =
-            this.models().find((m) =>
+            resolved ??
+            (this.models().find((m) =>
                 [m.id, ...(m.aliases || [])].includes(model),
-            ) || this.models().find((m) => m.id === this.getDefaultModel())!;
+            ) ||
+                this.models().find((m) => m.id === this.getDefaultModel())!);
 
         // messages.unshift({
         //     role: 'system',
@@ -279,6 +290,9 @@ export class AzureChatProvider implements IChatProvider {
                   }),
             messages: messages,
             model: modelUsed.id,
+            ...(params.service_tier !== undefined
+                ? { service_tier: params.service_tier }
+                : {}),
             ...(mappedTools?.length ? { tools: mappedTools } : {}),
             ...(max_tokens !== undefined
                 ? { max_completion_tokens: max_tokens }
@@ -315,7 +329,12 @@ export class AzureChatProvider implements IChatProvider {
         );
 
         return OpenAiUtil.handle_completion_output({
-            usage_calculator: ({ usage }) => {
+            usage_calculator: ({
+                service_tier,
+                usage,
+                setUsageCosts,
+                setUsageDetails,
+            }) => {
                 const cachedTokens =
                     usage.prompt_tokens_details?.cached_tokens ?? 0;
                 const trackedUsage = {
@@ -335,9 +354,20 @@ export class AzureChatProvider implements IChatProvider {
 
                 const costsOverrideFromModel = buildCostsOverride(
                     trackedUsage,
-                    modelUsed,
+                    serviceSpeedBillingModel(
+                        modelUsed,
+                        servedServiceSpeed({ service_tier }),
+                    ),
                 );
 
+                setUsageCosts(costsOverrideFromModel);
+                if (params.serviceSpeed !== undefined)
+                    setUsageDetails({
+                        ...OpenAiUtil.usageDetailsFromTrackedUsage(
+                            trackedUsage,
+                        )!,
+                        serviceSpeed: servedServiceSpeed({ service_tier }),
+                    });
                 this.#meteringService.utilRecordUsageObject(
                     trackedUsage,
                     actor!,

src/backend/drivers/ai-chat/providers/azure/AzureResponsesProvider.ts

@@ -19,6 +19,10 @@
 
 import { OpenAI } from 'openai';
 import { ResponseCreateParams } from 'openai/resources/responses/responses.mjs';
+import {
+    serviceSpeedBillingModel,
+    servedServiceSpeed,
+} from '../../utils/serviceSpeed.js';
 import { Context } from '../../../../core/context.js';
 import type { FSService } from '../../../../services/fs/FSService.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
@@ -152,37 +156,41 @@ export class AzureResponsesProvider implements IChatProvider {
             : {};
     }
 
-    async complete({
-        messages,
-        model,
-        max_tokens,
-        moderation,
-        tools,
-        tool_choice,
-        parallel_tool_calls,
-        include,
-        conversation,
-        compaction,
-        context_management,
-        previous_response_id,
-        instructions,
-        metadata,
-        prompt,
-        prompt_cache_key,
-        prompt_cache_retention,
-        store,
-        top_p,
-        truncation,
-        background,
-        service_tier,
-        verbosity,
-        stream,
-        reasoning,
-        reasoning_effort,
-        temperature,
-        text,
-        outputFormat,
-    }: ICompleteArguments): ReturnType<IChatProvider['complete']> {
+    async complete(
+        {
+            messages,
+            model,
+            max_tokens,
+            moderation,
+            tools,
+            tool_choice,
+            parallel_tool_calls,
+            include,
+            conversation,
+            compaction,
+            context_management,
+            previous_response_id,
+            instructions,
+            metadata,
+            prompt,
+            prompt_cache_key,
+            prompt_cache_retention,
+            store,
+            top_p,
+            truncation,
+            background,
+            service_tier,
+            serviceSpeed: requestedServiceSpeed,
+            verbosity,
+            stream,
+            reasoning,
+            reasoning_effort,
+            temperature,
+            text,
+            outputFormat,
+        }: ICompleteArguments,
+        resolved?: IChatModel,
+    ): ReturnType<IChatProvider['complete']> {
         // Validate messages
         if (!Array.isArray(messages)) {
             throw new HttpError(400, '`messages` must be an array', {
@@ -200,12 +208,13 @@ export class AzureResponsesProvider implements IChatProvider {
         model = model ?? this.#defaultModel;
 
         const modelUsed =
-            this.models({ no_restrictions: true }).find((m) =>
+            resolved ??
+            (this.models({ no_restrictions: true }).find((m) =>
                 [m.id, ...(m.aliases || [])].includes(model),
             ) ||
-            this.models({ no_restrictions: true }).find(
-                (m) => m.id === this.getDefaultModel(),
-            )!;
+                this.models({ no_restrictions: true }).find(
+                    (m) => m.id === this.getDefaultModel(),
+                )!);
 
         const userIdentifier = upstreamUserIdentifier(actor);
         // Cache key defaults to the actor identifier; see upstreamUserIdentifier.
@@ -335,9 +344,11 @@ export class AzureResponsesProvider implements IChatProvider {
         return OpenAiUtil.handle_completion_output_responses_api({
             usage_calculator: ({
                 usage,
+                service_tier,
                 webSearchCalls,
                 tool_usage,
                 setUsageCosts,
+                setUsageDetails,
             }) => {
                 const numWebSearches: number =
                     // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -363,7 +374,10 @@ export class AzureResponsesProvider implements IChatProvider {
 
                 const costsOverrideFromModel = buildCostsOverride(
                     trackedUsage,
-                    modelUsed,
+                    serviceSpeedBillingModel(
+                        modelUsed,
+                        servedServiceSpeed({ service_tier }),
+                    ),
                 );
                 if (numWebSearches) {
                     costsOverrideFromModel.web_search_calls =
@@ -374,6 +388,14 @@ export class AzureResponsesProvider implements IChatProvider {
                     });
                 }
 
+                setUsageCosts?.(costsOverrideFromModel);
+                if (requestedServiceSpeed !== undefined)
+                    setUsageDetails?.({
+                        ...OpenAiUtil.usageDetailsFromTrackedUsage(
+                            trackedUsage,
+                        )!,
+                        serviceSpeed: servedServiceSpeed({ service_tier }),
+                    });
                 this.#meteringService.utilRecordUsageObject(
                     trackedUsage,
                     actor,

src/backend/drivers/ai-chat/providers/azure/models.test.ts

@@ -40,7 +40,11 @@ const STANDALONE = [
 ];
 
 // Fields an Azure deployment genuinely differs from its source on, by puterId.
-const OVERRIDES: Record<string, string[]> = {};
+const OVERRIDES: Record<string, string[]> = {
+    'azure:x-ai/grok-4.3': ['serviceSpeedRates'],
+    'azure:x-ai/grok-4-20-non-reasoning': ['serviceSpeedRates'],
+    'azure:x-ai/grok-4-20-reasoning': ['serviceSpeedRates'],
+};
 
 const IDENTITY = ['id', 'puterId', 'aliases'];
 
@@ -65,6 +69,18 @@ const mirrored = AZURE_MODELS.filter(
 ).map((m) => [m.puterId!, m] as const);
 
 describe('AZURE_MODELS mirroring', () => {
+    it('inherits OpenAI fast rates without enabling direct-only speed tiers', () => {
+        for (const model of AZURE_MODELS) {
+            expect(model.serviceSpeedRates?.ultrafast).toBeUndefined();
+            if (model.puterId?.startsWith('azure:x-ai/')) {
+                expect(model.serviceSpeedRates?.fast).toBeUndefined();
+            }
+        }
+        const azure = AZURE_MODELS.find((model) => model.id === 'gpt-5.4')!;
+        expect(azure.serviceSpeedRates).toEqual({
+            fast: sourceOf(azure)!.serviceSpeedRates!.fast,
+        });
+    });
     it('has a direct-provider source for every entry not listed as standalone', () => {
         const orphans = mirrored
             .filter(([, m]) => !sourceOf(m))

src/backend/drivers/ai-chat/providers/azure/models.ts

@@ -22,10 +22,8 @@ import { OPEN_AI_MODELS } from '../openai/models.js';
 import { XAI_MODELS } from '../xai/models.js';
 
 /**
- * An Azure deployment of a model we also serve direct. Every field but the
- * identity comes from the source entry, so prices, long-context tiers and
- * limits can't drift from it. `name` is the vendor-qualified name both catalogs
- * share (`openai/gpt-5.4`); extra fields override the source.
+ * Azure shares its source model's list prices, context tiers, and limits.
+ * Identity and available service speeds belong to the deployment.
  */
 const mirror = (
     source: readonly IChatModel[],
@@ -41,6 +39,11 @@ const mirror = (
         puterId: `azure:${name}`,
         id: azure.id,
         ...shared,
+        serviceSpeedRates:
+            source === OPEN_AI_MODELS &&
+            shared.serviceSpeedRates?.fast !== undefined
+                ? { fast: shared.serviceSpeedRates.fast }
+                : undefined,
         aliases: [name],
         ...azure,
     };
@@ -127,6 +130,13 @@ export const AZURE_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 250,
+                cached_tokens: 25,
+                completion_tokens: 2000,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -171,6 +181,13 @@ export const AZURE_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 45,
+                cached_tokens: 4.5,
+                completion_tokens: 360,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 25,

src/backend/drivers/ai-chat/providers/claude/ClaudeProvider.integration.test.ts

@@ -147,6 +147,22 @@ describe.skipIf(skipUnlessEnv(ENV_VAR))('ClaudeProvider (integration)', () => {
         },
     );
 
+    it('returns a completion from claude-fable-5-2', { timeout: INTEGRATION_TEST_TIMEOUT_MS }, async () => {
+        const provider = buildProvider();
+        const result = await withTestActor(() =>
+            provider.complete({
+                model: 'claude-fable-5-2',
+                messages: [{ role: 'user', content: 'Reply with OK.' }],
+                reasoning_effort: 'low',
+                max_tokens: 128,
+            }),
+        );
+        const content = (result as {
+            message: { content: Array<{ type: string; text?: string }> };
+        }).message.content;
+        expect(content.find((block) => block.type === 'text')?.text?.length).toBeGreaterThan(0);
+    });
+
     // (a) Claude Code-shaped system blocks, attribution header first — the
     // pipeline must never merge or reorder system blocks: the header is
     // only recognized by Anthropic when it is the sole content of an

src/backend/drivers/ai-chat/providers/claude/ClaudeProvider.test.ts

@@ -1173,6 +1173,7 @@ describe('ClaudeProvider.complete request shape', () => {
     });
 
     it.each([
+        'claude-fable-5-2',
         'claude-fable-5-1',
         'claude-haiku-5-5',
         'claude-opus-5-5',
@@ -1198,6 +1199,7 @@ describe('ClaudeProvider.complete request shape', () => {
     );
 
     it.each([
+        'claude-fable-5-2',
         'claude-fable-5-1',
         'claude-haiku-5-5',
         'claude-opus-5-5',
@@ -1303,6 +1305,73 @@ describe('ClaudeProvider model resolution', () => {
         );
     });
 
+    it.each([
+        'claude-fable-5-2',
+        'claude-fable-5-2-latest',
+        'claude-fable-5.2',
+        'anthropic/claude-fable-5-2',
+    ])(
+        'routes %s to Fable 5.2 with published rates',
+        async (model) => {
+            const { provider } = makeProvider();
+            messagesCreateMock.mockResolvedValueOnce({
+                content: [{ type: 'text', text: 'ok' }],
+                usage: {
+                    input_tokens: 100,
+                    output_tokens: 50,
+                    cache_read_input_tokens: 1000,
+                    cache_creation_input_tokens: 200,
+                    cache_creation: {
+                        ephemeral_5m_input_tokens: 150,
+                        ephemeral_1h_input_tokens: 50,
+                    },
+                },
+            });
+
+            await withTestActor(() =>
+                provider.complete({
+                    model,
+                    messages: [{ role: 'user', content: 'hi' }],
+                }),
+            );
+
+            expect(messagesCreateMock.mock.calls[0]![0].model).toBe(
+                'claude-fable-5-2',
+            );
+            const fable52 = CLAUDE_MODELS.find(
+                (m) => m.id === 'claude-fable-5-2',
+            )!;
+            expect(fable52.costs).toMatchObject({
+                input_tokens: 800,
+                output_tokens: 4000,
+                cache_read_input_tokens: 20,
+                ephemeral_5m_input_tokens: 1000,
+                ephemeral_1h_input_tokens: 1600,
+            });
+            expect(fable52.serviceSpeedRates?.fast).toMatchObject({
+                input_tokens: 1600,
+                output_tokens: 8000,
+                cache_read_input_tokens: 40,
+                ephemeral_5m_input_tokens: 2000,
+                ephemeral_1h_input_tokens: 3200,
+            });
+            expect(fable52.context).toBe(1_000_000);
+            expect(fable52.max_tokens).toBe(128_000);
+            const [, , prefix, overrides] = recordSpy.mock.calls[0]!;
+            expect(prefix).toBe('claude:claude-fable-5-2');
+            expect(overrides).toMatchObject({
+                input_tokens: 100 * Number(fable52.costs.input_tokens),
+                output_tokens: 50 * Number(fable52.costs.output_tokens),
+                cache_read_input_tokens:
+                    1000 * Number(fable52.costs.cache_read_input_tokens),
+                ephemeral_5m_input_tokens:
+                    150 * Number(fable52.costs.ephemeral_5m_input_tokens),
+                ephemeral_1h_input_tokens:
+                    50 * Number(fable52.costs.ephemeral_1h_input_tokens),
+            });
+        },
+    );
+
     it('routes the bare claude-fable alias to fable 5.1 rather than fable 5', async () => {
         const { provider } = makeProvider();
         messagesCreateMock.mockResolvedValueOnce(baseResponse);
@@ -2311,16 +2380,20 @@ describe('ClaudeProvider metering', () => {
         expect('thinking_tokens' in overrides).toBe(false);
     });
 
-    it('bills at the fast_* rates when the upstream reports usage.speed:"fast"', async () => {
+    it.each(['claude-opus-5-5', 'claude-fable-5-2'])('bills at fast rates for %s when the upstream reports fast usage', async (model) => {
         const { provider } = makeProvider();
         messagesCreateMock.mockResolvedValueOnce({
             content: [{ type: 'text', text: 'hi' }],
-            usage: { input_tokens: 10, output_tokens: 5, speed: 'fast' },
+            usage: {
+                input_tokens: 10, output_tokens: 5, speed: 'fast',
+                cache_creation: { ephemeral_5m_input_tokens: 7, ephemeral_1h_input_tokens: 3 },
+                cache_read_input_tokens: 20,
+            },
         });
 
         const result = (await withTestActor(() =>
             provider.complete({
-                model: 'claude-opus-5-5',
+                model,
                 messages: [{ role: 'user', content: 'hi' }],
                 speed: 'fast',
             }),
@@ -2331,11 +2404,15 @@ describe('ClaudeProvider metering', () => {
         expect('input_tokens' in result.usage).toBe(false);
         expect(result.usageDetails.speed).toBe('fast');
 
-        const opus = CLAUDE_MODELS.find((m) => m.id === 'claude-opus-5-5')!;
+        const selectedModel = CLAUDE_MODELS.find((m) => m.id === model)!;
         const [, , prefix, overrides] = recordSpy.mock.calls[0]!;
-        expect(prefix).toBe('claude:claude-opus-5-5');
-        expect(overrides.fast_input_tokens).toBe(10 * Number(opus.costs.fast_input_tokens));
-        expect(overrides.fast_output_tokens).toBe(5 * Number(opus.costs.fast_output_tokens));
+        expect(prefix).toBe(`claude:${model}`);
+        const fastRates = selectedModel.serviceSpeedRates!.fast as Record<string, number>;
+        expect(overrides.fast_input_tokens).toBe(10 * fastRates.input_tokens);
+        expect(overrides.fast_output_tokens).toBe(5 * fastRates.output_tokens);
+        expect(overrides.fast_ephemeral_5m_input_tokens).toBe(7 * fastRates.ephemeral_5m_input_tokens);
+        expect(overrides.fast_ephemeral_1h_input_tokens).toBe(3 * fastRates.ephemeral_1h_input_tokens);
+        expect(overrides.fast_cache_read_input_tokens).toBe(20 * fastRates.cache_read_input_tokens);
     });
 
     it('bills at standard rates when fast mode was requested but not granted by the upstream', async () => {
@@ -2357,13 +2434,15 @@ describe('ClaudeProvider metering', () => {
         expect('fast_input_tokens' in result.usage).toBe(false);
     });
 
-    it('retries at standard speed on Claude when fast mode is rate limited', async () => {
+    it.each([
+        [429, "This request would exceed your organization's rate limit of 0 fast mode input tokens per minute"],
+        [529, 'Overloaded'],
+        [529, 'Fast mode capacity unavailable'],
+    ])('retries at standard speed on Claude after fast capacity failure %s', async (status, message) => {
         const { provider } = makeProvider();
         const fastLimited = Object.assign(
-            new Error(
-                "This request would exceed your organization's rate limit of 0 fast mode input tokens per minute",
-            ),
-            { status: 429 },
+            new Error(message),
+            { status },
         );
         messagesCreateMock.mockRejectedValueOnce(fastLimited).mockResolvedValueOnce({
             content: [{ type: 'text', text: 'hi' }],
@@ -2587,13 +2666,13 @@ describe('ClaudeProvider.requestPricing', () => {
     const haiku = CLAUDE_MODELS.find((m) => m.id === 'claude-haiku-4-5-20251001')!;
     const opus55 = CLAUDE_MODELS.find((m) => m.id === 'claude-opus-5-5')!;
 
-    it('returns fast cost keys only when the model has fast rates and fast was requested', () => {
+    it('leaves token reservation keys to the selected catalog rate card', () => {
         const { provider } = makeProvider();
         expect(
             provider.requestPricing({ speed: 'fast', tools: [] } as never, opus55, {
                 promptTokenEstimate: 10,
             }),
-        ).toMatchObject({ inputKey: 'fast_input_tokens', outputKey: 'fast_output_tokens' });
+        ).toEqual({});
         expect(
             provider.requestPricing({ speed: 'fast', tools: [] } as never, haiku, {
                 promptTokenEstimate: 10,

src/backend/drivers/ai-chat/providers/claude/ClaudeProvider.ts

@@ -43,6 +43,7 @@ import {
 } from '../../utils/mediaParts.js';
 import { isToolChoice, toolChoiceFromWire } from '../../utils/openaiParams.js';
 import { buildCostsOverride } from '../../utils/pricing.js';
+import { serviceSpeedCosts } from '../../utils/serviceSpeed.js';
 import type {
     AIChatStream,
     AIChatTextStream,
@@ -107,20 +108,21 @@ const toAnthropicMediaPart = (part: any): any => {
     return part;
 };
 
-/** A 429 from fast mode's separate quota, not the model's normal limits. */
-const isFastModeRateLimit = (e: unknown): boolean => {
+/** Fast quota or overload failures can be retried at standard speed. */
+const isFastModeUnavailable = (e: unknown): boolean => {
     const err = e as { status?: unknown; message?: unknown };
     return (
-        err?.status === 429 &&
-        typeof err.message === 'string' &&
-        /fast mode/i.test(err.message)
+        typeof err?.message === 'string' &&
+        ((err?.status === 429 && /fast mode/i.test(err.message)) ||
+            (err?.status === 529 && /overload|fast mode/i.test(err.message)))
     );
 };
 
 // Models whose current turn rejects a non-default temperature/top_p/top_k
-// outright. Fable 5/5.1, Sonnet 5/5.5, Haiku 5.5, and Opus 4.7+.
+// outright. Fable 5/5.1/5.2, Sonnet 5/5.5, Haiku 5.5, and Opus 4.7+.
 const OMITS_SAMPLING_PARAMS = new Set([
     'claude-haiku-5-5',
+    'claude-fable-5-2',
     'claude-fable-5-1',
     'claude-fable-5',
     'claude-sonnet-5-5',
@@ -133,6 +135,7 @@ const OMITS_SAMPLING_PARAMS = new Set([
 
 const SUPPORTS_EFFORT = new Set([
     'claude-haiku-5-5',
+    'claude-fable-5-2',
     'claude-fable-5-1',
     'claude-fable-5',
     'claude-sonnet-5-5',
@@ -298,20 +301,12 @@ export class ClaudeProvider implements IChatProvider {
         return `claude:${modelId}`;
     }
 
-    /**
-     * Sizes the credit hold for Claude-only extras the generic per-token math
-     * can't see: fast mode's own rate card, and a web-search/advisor tool that
-     * could run several times before the model answers.
-     */
+    /** Reserves tools that can run several times before the model answers. */
     requestPricing(
         args: ICompleteArguments,
         model: IChatModel,
         est: { promptTokenEstimate: number },
-    ): { inputKey?: string; outputKey?: string; extraCost?: number } {
-        const fast =
-            args.speed === 'fast' &&
-            model.costs?.fast_output_tokens !== undefined;
-
+    ): { extraCost?: number } {
         let extraCost = 0;
         for (const raw of args.tools ?? []) {
             const tool = raw as Record<string, unknown>;
@@ -350,12 +345,6 @@ export class ClaudeProvider implements IChatProvider {
         }
 
         return {
-            ...(fast
-                ? {
-                      inputKey: 'fast_input_tokens',
-                      outputKey: 'fast_output_tokens',
-                  }
-                : {}),
             ...(extraCost > 0 ? { extraCost } : {}),
         };
     }
@@ -364,11 +353,9 @@ export class ClaudeProvider implements IChatProvider {
         try {
             return await this.#completeOnce(args);
         } catch (e) {
-            // Fast mode has its own quota. Anthropic's advice on that 429 is to
-            // drop `speed` and run at standard speed; doing it here keeps the
-            // request on Claude instead of marking the route unhealthy and
-            // replaying it on a reseller.
-            if (args.speed === 'fast' && isFastModeRateLimit(e)) {
+            // Retry fast-capacity failures on Claude at standard speed before
+            // considering a different provider.
+            if (args.speed === 'fast' && isFastModeUnavailable(e)) {
                 return await this.#completeOnce({ ...args, speed: undefined });
             }
             throw e;
@@ -637,7 +624,7 @@ export class ClaudeProvider implements IChatProvider {
             : undefined;
         const fast =
             args.speed === 'fast' &&
-            modelUsed.costs?.fast_output_tokens !== undefined;
+            modelUsed.serviceSpeedRates?.fast !== undefined;
         const safeguardsPolicy = applySafeguardsPolicy(
             args.safeguards,
             args.anthropicBetas,
@@ -1071,6 +1058,7 @@ export class ClaudeProvider implements IChatProvider {
         // keeps reasoning visible in the stream.
         if (
             modelId === 'claude-haiku-5-5' ||
+            modelId === 'claude-fable-5-2' ||
             modelId === 'claude-fable-5-1' ||
             modelId === 'claude-fable-5' ||
             modelId === 'claude-sonnet-5-5' ||
@@ -1505,7 +1493,8 @@ export class ClaudeProvider implements IChatProvider {
 
         const fast =
             raw.speed === 'fast' &&
-            modelUsed.costs?.fast_output_tokens !== undefined;
+            modelUsed.serviceSpeedRates?.fast !== undefined;
+        // Keep published usage keys while resolving rates from the common catalog shape.
         const executorUsage: Record<string, number> = fast
             ? Object.fromEntries(
                   Object.entries(exec).map(([k, v]) => [`fast_${k}`, v]),
@@ -1517,7 +1506,24 @@ export class ClaudeProvider implements IChatProvider {
         const fetches = raw.server_tool_use?.web_fetch_requests ?? 0;
         if (fetches) executorUsage.web_fetch_requests = fetches;
 
-        const executorCosts = buildCostsOverride(executorUsage, modelUsed);
+        const fastRates = fast
+            ? serviceSpeedCosts(modelUsed, 'fast')
+            : undefined;
+        const billingModel = fastRates
+            ? {
+                  ...modelUsed,
+                  costs: {
+                      ...modelUsed.costs,
+                      ...Object.fromEntries(
+                          Object.keys(exec).map((key) => [
+                              `fast_${key}`,
+                              fastRates[key],
+                          ]),
+                      ),
+                  },
+              }
+            : modelUsed;
+        const executorCosts = buildCostsOverride(executorUsage, billingModel);
 
         let advisorUsage: Record<string, number> | undefined;
         let advisorCosts: Record<string, number> | undefined;

src/backend/drivers/ai-chat/providers/claude/models.ts

@@ -55,6 +55,46 @@ export const CLAUDE_MODELS: IChatModel[] = [
         context: 1_000_000,
         max_tokens: 128_000,
     },
+    {
+        puterId: 'anthropic:anthropic/claude-fable-5-2',
+        id: 'claude-fable-5-2',
+        modalities: { input: ['text', 'image', 'pdf'], output: ['text'] },
+        open_weights: false,
+        tool_call: true,
+        release_date: '2026-11-09',
+        aliases: [
+            'claude-fable-5-2-latest',
+            'claude-fable-5.2',
+            'anthropic/claude-fable-5-2',
+        ],
+        name: 'Claude Fable 5.2',
+        midConversationSystem: true,
+        costs_currency: 'usd-cents',
+        input_cost_key: 'input_tokens',
+        output_cost_key: 'output_tokens',
+        // Source: https://www.anthropic.com/claude-fable-and-mythos-5-2
+        serviceSpeedRates: {
+            fast: {
+                input_tokens: 1600,
+                output_tokens: 8000,
+                ephemeral_5m_input_tokens: 1600 * 1.25,
+                ephemeral_1h_input_tokens: 1600 * 2,
+                cache_read_input_tokens: 1600 * 0.025,
+            },
+        },
+        costs: {
+            tokens: 1_000_000,
+            input_tokens: 800,
+            ephemeral_5m_input_tokens: 800 * 1.25,
+            ephemeral_1h_input_tokens: 800 * 2,
+            // 0.025x input, not the usual 0.1x.
+            cache_read_input_tokens: 800 * 0.025,
+            output_tokens: 4000,
+            web_search_requests: 1_000_000, // $10/1k requests
+        },
+        context: 1000000,
+        max_tokens: 128000,
+    },
     {
         puterId: 'anthropic:anthropic/claude-fable-5-1',
         id: 'claude-fable-5-1',
@@ -190,6 +230,15 @@ export const CLAUDE_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'input_tokens',
         output_cost_key: 'output_tokens',
+        serviceSpeedRates: {
+            fast: {
+                input_tokens: 800,
+                output_tokens: 4000,
+                ephemeral_5m_input_tokens: 1000,
+                ephemeral_1h_input_tokens: 1600,
+                cache_read_input_tokens: 40,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             input_tokens: 400,
@@ -199,12 +248,6 @@ export const CLAUDE_MODELS: IChatModel[] = [
             cache_read_input_tokens: 400 * 0.05,
             output_tokens: 2000,
             web_search_requests: 1_000_000,
-            // Fast mode (`speed:'fast'`), live-verified.
-            fast_input_tokens: 800,
-            fast_output_tokens: 4000,
-            fast_ephemeral_5m_input_tokens: 1000,
-            fast_ephemeral_1h_input_tokens: 1600,
-            fast_cache_read_input_tokens: 40, // 0.05x fast_input_tokens
         },
         context: 1000000,
         max_tokens: 128000,
@@ -223,6 +266,15 @@ export const CLAUDE_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'input_tokens',
         output_cost_key: 'output_tokens',
+        serviceSpeedRates: {
+            fast: {
+                input_tokens: 1000,
+                output_tokens: 5000,
+                ephemeral_5m_input_tokens: 1250,
+                ephemeral_1h_input_tokens: 2000,
+                cache_read_input_tokens: 100,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             input_tokens: 500,
@@ -231,11 +283,6 @@ export const CLAUDE_MODELS: IChatModel[] = [
             cache_read_input_tokens: 500 * 0.1,
             output_tokens: 2500,
             web_search_requests: 1_000_000,
-            fast_input_tokens: 1000,
-            fast_output_tokens: 5000,
-            fast_ephemeral_5m_input_tokens: 1250,
-            fast_ephemeral_1h_input_tokens: 2000,
-            fast_cache_read_input_tokens: 100,
         },
         context: 1000000,
         max_tokens: 128000,
@@ -258,6 +305,15 @@ export const CLAUDE_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'input_tokens',
         output_cost_key: 'output_tokens',
+        serviceSpeedRates: {
+            fast: {
+                input_tokens: 1000,
+                output_tokens: 5000,
+                ephemeral_5m_input_tokens: 1250,
+                ephemeral_1h_input_tokens: 2000,
+                cache_read_input_tokens: 100,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             input_tokens: 500,
@@ -266,11 +322,6 @@ export const CLAUDE_MODELS: IChatModel[] = [
             cache_read_input_tokens: 500 * 0.1,
             output_tokens: 2500,
             web_search_requests: 1_000_000,
-            fast_input_tokens: 1000,
-            fast_output_tokens: 5000,
-            fast_ephemeral_5m_input_tokens: 1250,
-            fast_ephemeral_1h_input_tokens: 2000,
-            fast_cache_read_input_tokens: 100,
         },
         context: 1000000,
         max_tokens: 128000,

src/backend/drivers/ai-chat/providers/gemini/GeminiChatProvider.ts

@@ -84,8 +84,14 @@ export class GeminiChatProvider extends OpenAICompatProvider {
             chat: {
                 completions: {
                     create: (params, options) => {
-                        const { model } = params as { model: string };
-                        if (!GEMINI_NATIVE_MODELS.has(model)) {
+                        const { model, service_tier } = params as {
+                            model: string;
+                            service_tier?: string;
+                        };
+                        if (
+                            !GEMINI_NATIVE_MODELS.has(model) &&
+                            (service_tier === undefined || !native)
+                        ) {
                             return compat.chat.completions.create(
                                 params,
                                 options,
@@ -103,7 +109,12 @@ export class GeminiChatProvider extends OpenAICompatProvider {
                 },
             },
         };
-        const models = native ? GEMINI_MODELS : COMPAT_ONLY_MODELS;
+        const models: IChatModel[] = native
+            ? GEMINI_MODELS
+            : COMPAT_ONLY_MODELS.map((model) => ({
+                  ...model,
+                  serviceSpeeds: ['standard'],
+              }));
         super(meteringService, {
             client,
             defaultModel: 'gemini-2.5-flash',
@@ -183,7 +194,10 @@ export class GeminiChatProvider extends OpenAICompatProvider {
     }
 
     protected override meteredUsage(source: UsageSource, model: IChatModel) {
-        if (GEMINI_NATIVE_MODELS.has(model.id)) {
+        if (
+            GEMINI_NATIVE_MODELS.has(model.id) ||
+            'promptTokenCount' in (source.usage ?? {})
+        ) {
             return nativeMeteredUsage(
                 source.usage as unknown as
                     GenerateContentResponseUsageMetadata | undefined,

src/backend/drivers/ai-chat/providers/gemini/geminiNative.ts

@@ -80,6 +80,7 @@ interface ChatParams {
     temperature?: number;
     reasoning_effort?: 'minimal' | 'low' | 'medium' | 'high';
     stream?: boolean;
+    service_tier?: string;
 }
 
 /** Ids made up for calls Gemini returned without one; never sent back. */
@@ -240,6 +241,12 @@ const toGenerateContentRequest = (
         ? toolConfigOf(params.tool_choice)
         : undefined;
     const config: GenerateContentConfig = {
+        ...(params.service_tier !== undefined
+            ? {
+                  serviceTier:
+                      params.service_tier as GenerateContentConfig['serviceTier'],
+              }
+            : {}),
         ...(signal ? { abortSignal: signal } : {}),
         ...(systemInstruction ? { systemInstruction } : {}),
         ...(params.max_completion_tokens !== undefined

src/backend/drivers/ai-chat/providers/gemini/models.ts

@@ -142,6 +142,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: ARGON_LAUNCH_COSTS,
         pricingOverrides: listPricingFrom(
             '2026-12-01T00:00:00Z',
@@ -174,6 +175,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
         // Google serves this endpoint with gemini-3.6-flash and bills its rates.
+        serviceSpeedRates: { fast: 1.8 },
         costs: FLASH_LAUNCH_COSTS,
         pricingOverrides: FLASH_LIST_PRICING,
     },
@@ -201,6 +203,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30,
@@ -228,6 +231,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: FLASH_LAUNCH_COSTS,
         pricingOverrides: FLASH_LIST_PRICING,
     },
@@ -250,6 +254,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
         // Google serves this endpoint with gemini-3.8-flash and bills its rates.
+        serviceSpeedRates: { fast: 1.8 },
         costs: FLASH_LAUNCH_COSTS,
         pricingOverrides: FLASH_LIST_PRICING,
     },
@@ -270,6 +275,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: FLASH_LAUNCH_COSTS,
         pricingOverrides: FLASH_LIST_PRICING,
     },
@@ -291,6 +297,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 25,
@@ -318,6 +325,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 50,
@@ -344,6 +352,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30,
@@ -374,6 +383,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 10,
@@ -402,6 +412,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -448,6 +459,7 @@ export const GEMINI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.8 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,

src/backend/drivers/ai-chat/providers/infron/InfronProvider.ts

@@ -266,6 +266,15 @@ export class InfronProvider extends OpenAICompatProvider {
         return coerced_models;
     }
 
+    async serviceSpeedModels(model: IChatModel) {
+        const variant = (await this.models()).find(
+            (entry) => entry.id === `${model.id}:priority`,
+        );
+        return variant
+            ? { fast: { ...variant, provider: model.provider } }
+            : {};
+    }
+
     protected override vendorParams(
         params: Record<string, unknown>,
         _args: unknown,

src/backend/drivers/ai-chat/providers/minimax/models.ts

@@ -43,6 +43,8 @@ export const MINIMAX_MODELS: MiniMaxChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.5 },
+        serviceSpeedVariants: { fast: 'minimax-m3-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30, // $0.30 per 1M (input <= 512k tokens)
@@ -70,6 +72,7 @@ export const MINIMAX_MODELS: MiniMaxChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'minimax-m2.7-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30, // $0.30 per 1M
@@ -122,6 +125,7 @@ export const MINIMAX_MODELS: MiniMaxChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'minimax-m2.5-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30, // $0.30 per 1M
@@ -174,6 +178,7 @@ export const MINIMAX_MODELS: MiniMaxChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'minimax-m2.1-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30, // $0.30 per 1M
@@ -222,6 +227,7 @@ export const MINIMAX_MODELS: MiniMaxChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'minimax-m2-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30, // $0.30 per 1M

src/backend/drivers/ai-chat/providers/mistral/MistralAiProvider.test.ts

@@ -20,13 +20,12 @@
 /**
  * Offline unit tests for MistralAIProvider.
  *
- * Boots a real PuterServer (in-memory sqlite + dynamo + s3 + mock
- * redis) and constructs MistralAIProvider directly against the live
- * wired `MeteringService` so the recording side is exercised end-to-
- * end. The Mistral SDK is mocked at the module boundary (the real
- * network egress point) so the provider never reaches the network.
- * The companion integration test (MistralAiProvider.integration.test.ts)
- * exercises the real Mistral endpoint.
+ * Boots a real PuterServer (in-memory sqlite + dynamo + s3 + mock redis) and
+ * constructs MistralAIProvider directly against the live wired
+ * `MeteringService` so the recording side is exercised end-to- end. The Mistral
+ * SDK is mocked at the module boundary (the real network egress point) so the
+ * provider never reaches the network. The companion integration test
+ * (MistralAiProvider.integration.test.ts) exercises the real Mistral endpoint.
  */
 
 import { Context } from '../../../../core/context.js';
@@ -147,7 +146,9 @@ describe('MistralAIProvider construction', () => {
     it('constructs the Mistral SDK with the configured API key', () => {
         makeProvider();
         expect(mistralCtor).toHaveBeenCalledTimes(1);
-        expect(mistralCtor).toHaveBeenCalledWith({ apiKey: 'test-key' });
+        expect(mistralCtor).toHaveBeenCalledWith(
+            expect.objectContaining({ apiKey: 'test-key' }),
+        );
     });
 });
 
@@ -606,7 +607,11 @@ describe('MistralAIProvider.complete non-stream output', () => {
             if (stream) {
                 streamMock.mockResolvedValueOnce(
                     asAsyncIterable([
-                        { data: { choices: [{ delta: { content: 'hello' } }] } },
+                        {
+                            data: {
+                                choices: [{ delta: { content: 'hello' } }],
+                            },
+                        },
                         { data: { choices: [], usage } },
                     ]),
                 );
@@ -643,7 +648,11 @@ describe('MistralAIProvider.complete non-stream output', () => {
                 expect(result).toMatchObject({ message: { content: 'hello' } });
             }
             expect(recordSpy).toHaveBeenCalledWith(
-                { prompt_tokens: 5, cached_tokens: 1008, completion_tokens: 30 },
+                {
+                    prompt_tokens: 5,
+                    cached_tokens: 1008,
+                    completion_tokens: 30,
+                },
                 SYSTEM_ACTOR,
                 `mistral:${model}`,
                 {
@@ -688,8 +697,7 @@ describe('MistralAIProvider.complete non-stream output', () => {
         });
 
         expect(recordSpy).toHaveBeenCalledTimes(1);
-        const [usage, actor, prefix, overrides] =
-            recordSpy.mock.calls[0]!;
+        const [usage, actor, prefix, overrides] = recordSpy.mock.calls[0]!;
         expect(usage).toEqual({
             prompt_tokens: 100,
             completion_tokens: 50,
@@ -718,15 +726,11 @@ describe('MistralAIProvider.complete non-stream output', () => {
                         content: [
                             {
                                 type: 'thinking',
-                                thinking: [
-                                    { type: 'text', text: 'step one.' },
-                                ],
+                                thinking: [{ type: 'text', text: 'step one.' }],
                             },
                             {
                                 type: 'thinking',
-                                thinking: [
-                                    { type: 'text', text: 'step two.' },
-                                ],
+                                thinking: [{ type: 'text', text: 'step two.' }],
                             },
                             { type: 'text', text: 'the answer' },
                         ],
@@ -916,8 +920,7 @@ describe('MistralAIProvider.complete streaming', () => {
 
         // mistral-small-2603: prompt=15, completion=60.
         expect(recordSpy).toHaveBeenCalledTimes(1);
-        const [, , prefix, overrides] =
-            recordSpy.mock.calls[0]!;
+        const [, , prefix, overrides] = recordSpy.mock.calls[0]!;
         expect(prefix).toBe('mistral:mistral-small-2603');
         expect(overrides).toMatchObject({
             prompt_tokens: 4 * 15,
@@ -1115,7 +1118,7 @@ describe('MistralAIProvider image_url coercion', () => {
         usage: { promptTokens: 1, completionTokens: 1 },
     };
 
-    it('rewrites canonical image_url parts to the SDK\'s camelCase imageUrl', async () => {
+    it("rewrites canonical image_url parts to the SDK's camelCase imageUrl", async () => {
         const { provider } = makeProvider();
         completeMock.mockResolvedValueOnce(baseCompletion);
 
@@ -1175,7 +1178,8 @@ describe('MistralAIProvider image_url coercion', () => {
                             },
                             {
                                 type: 'image_url',
-                                image_url: 'https://example.com/already-flat.png',
+                                image_url:
+                                    'https://example.com/already-flat.png',
                             },
                         ],
                     },
@@ -1251,7 +1255,9 @@ describe('MistralAIProvider image_url coercion', () => {
                             { type: 'text', text: 'what is in this image?' },
                             {
                                 type: 'image_url',
-                                image_url: { url: 'https://example.com/photo.jpg' },
+                                image_url: {
+                                    url: 'https://example.com/photo.jpg',
+                                },
                             },
                         ],
                     },
@@ -1260,7 +1266,11 @@ describe('MistralAIProvider image_url coercion', () => {
         );
 
         const [args] = completeMock.mock.calls[0]!;
-        const parts = args.messages[0].content as { type: string; text?: string; imageUrl?: unknown }[];
+        const parts = args.messages[0].content as {
+            type: string;
+            text?: string;
+            imageUrl?: unknown;
+        }[];
         const textPart = parts.find((p) => p.type === 'text');
         const imgPart = parts.find((p) => p.type === 'image_url');
         expect(textPart?.text).toBe('what is in this image?');
@@ -1300,3 +1310,41 @@ describe('MistralAIProvider.checkModeration', () => {
         );
     });
 });
+
+describe('Mistral service speed wire mapping', () => {
+    it('adds the tier after SDK serialization and removes its internal header', async () => {
+        makeProvider();
+        const options = mistralCtor.mock.calls[0][0] as {
+            httpClient: import('@mistralai/mistralai/lib/http.js').HTTPClient;
+        };
+        let sent: Request | undefined;
+        vi.stubGlobal('fetch', async (input: Request) => {
+            sent = input;
+            return new Response('{}', {
+                headers: { 'content-type': 'application/json' },
+            });
+        });
+        try {
+            await options.httpClient.request(
+                new Request('https://api.mistral.ai/v1/chat/completions', {
+                    method: 'POST',
+                    headers: {
+                        'content-type': 'application/json',
+                        'x-puter-service-tier': 'auto',
+                    },
+                    body: JSON.stringify({
+                        model: 'mistral-medium-latest',
+                        messages: [],
+                    }),
+                }),
+            );
+            expect(sent?.headers.has('x-puter-service-tier')).toBe(false);
+            expect(await sent?.json()).toMatchObject({
+                model: 'mistral-medium-latest',
+                service_tier: 'auto',
+            });
+        } finally {
+            vi.unstubAllGlobals();
+        }
+    });
+});

src/backend/drivers/ai-chat/providers/mistral/MistralAiProvider.ts

@@ -17,6 +17,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+import { HTTPClient } from '@mistralai/mistralai/lib/http.js';
+import { servedServiceSpeed } from '../../utils/serviceSpeed.js';
 import { Mistral } from '@mistralai/mistralai';
 import { ChatCompletionResponse } from '@mistralai/mistralai/models/components/chatcompletionresponse.js';
 import { MistralError } from '@mistralai/mistralai/models/errors/mistralerror.js';
@@ -26,6 +28,7 @@ import { Context } from '../../../../core/context.js';
 import { HttpError } from '../../../../core/http/HttpError.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
 import type {
+    IChatModel,
     IChatCompleteResult,
     IChatProvider,
     ICompleteArguments,
@@ -106,6 +109,7 @@ const coerceMistralUsage = (usage: UsageInfo) => {
         prompt_tokens: (usage.promptTokens ?? 0) - cachedTokens,
         completion_tokens: usage.completionTokens ?? 0,
         prompt_tokens_details: { cached_tokens: cachedTokens },
+        service_tier: usage.additionalProperties?.service_tier,
     };
 };
 
@@ -115,7 +119,24 @@ export class MistralAIProvider implements IChatProvider {
     #meteringService: MeteringService;
 
     constructor(config: { apiKey: string }, meteringService: MeteringService) {
+        const httpClient = new HTTPClient();
+        // The SDK strips service_tier during body serialization.
+        httpClient.addHook('beforeRequest', async (request) => {
+            const tier = request.headers.get('x-puter-service-tier');
+            if (!tier) return;
+            const headers = new Headers(request.headers);
+            headers.delete('x-puter-service-tier');
+            const body = await request.json();
+            return new Request(request, {
+                headers,
+                body: JSON.stringify({
+                    ...body,
+                    service_tier: tier === 'auto' ? 'auto' : 'standard_only',
+                }),
+            });
+        });
         this.#client = new Mistral({
+            httpClient,
             apiKey: config.apiKey,
         });
         this.#meteringService = meteringService;
@@ -181,17 +202,22 @@ export class MistralAIProvider implements IChatProvider {
         return `mistral:${modelId}`;
     }
 
-    async complete({
-        messages,
-        stream,
-        model,
-        tools,
-        max_tokens,
-        temperature,
-        normalize,
-        response,
-        custom,
-    }: ICompleteArguments): Promise<IChatCompleteResult> {
+    async complete(
+        {
+            messages,
+            stream,
+            model,
+            tools,
+            max_tokens,
+            temperature,
+            normalize,
+            response,
+            custom,
+            service_tier,
+            serviceSpeed: requestedServiceSpeed,
+        }: ICompleteArguments,
+        resolved?: IChatModel,
+    ): Promise<IChatCompleteResult> {
         // Mistral's reasoning prompt mode: with `prompt_mode: 'reasoning'`,
         // reasoning-capable models return their thinking as structured ThinkChunk
         // content (which the splitter below separates into `reasoning`)
@@ -217,10 +243,13 @@ export class MistralAIProvider implements IChatProvider {
         }
 
         const selectedModel =
-            (await this.models()).find((m) =>
+            resolved ??
+            ((await this.models()).find((m) =>
                 [m.id, ...(m.aliases || [])].includes(model),
             ) ||
-            (await this.models()).find((m) => m.id === this.getDefaultModel())!;
+                (await this.models()).find(
+                    (m) => m.id === this.getDefaultModel(),
+                )!);
         const actor = Context.get('actor');
         let completion: Awaited<
             ReturnType<Mistral['chat']['complete' | 'stream']>
@@ -242,6 +271,9 @@ export class MistralAIProvider implements IChatProvider {
                 // The SDK retries nothing by default and has no timeout once a
                 // signal is passed; a stream is bounded by its caller instead.
                 {
+                    ...(service_tier !== undefined
+                        ? { headers: { 'x-puter-service-tier': service_tier } }
+                        : {}),
                     signal: stream
                         ? Context.get('upstreamSignal')
                         : withSdkTimeout(Context.get('upstreamSignal')),
@@ -398,7 +430,8 @@ export class MistralAIProvider implements IChatProvider {
             },
             completion: completion as ChatCompletionResponse,
             stream,
-            usage_calculator: ({ usage, setUsageCosts }) => {
+            usage_calculator: ({ usage, setUsageCosts, setUsageDetails }) => {
+                const serviceSpeed = servedServiceSpeed({ usage });
                 // `coerceMistralUsage` has already taken cached reads out of
                 // `prompt_tokens`.
                 const metered = meterChatUsage(
@@ -407,8 +440,16 @@ export class MistralAIProvider implements IChatProvider {
                     this.meteringModelKey(selectedModel.id),
                     selectedModel,
                     OpenAIUtil.extractMeteredUsage(usage),
+                    { serviceSpeed },
                 );
                 setUsageCosts(metered.costs);
+                if (requestedServiceSpeed !== undefined)
+                    setUsageDetails({
+                        ...OpenAIUtil.usageDetailsFromTrackedUsage(
+                            metered.usage,
+                        )!,
+                        serviceSpeed,
+                    });
                 return metered.usage;
             },
         });

src/backend/drivers/ai-chat/providers/mistral/models.ts

@@ -42,6 +42,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 136,
@@ -75,6 +76,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 150,
@@ -105,6 +107,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 50,
@@ -135,6 +138,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 15,
@@ -159,6 +163,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 140,
@@ -188,6 +193,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 30,
@@ -213,6 +219,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 20,
@@ -238,6 +245,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 15,
@@ -262,6 +270,7 @@ export const MISTRAL_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 1.75 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 10,

src/backend/drivers/ai-chat/providers/moonshot/models.ts

@@ -30,6 +30,7 @@ export const MOONSHOT_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'kimi-k3.1-pro-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200, // $2.00 per 1M
@@ -77,6 +78,7 @@ export const MOONSHOT_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'kimi-k3-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 300, // $3.00 per 1M
@@ -104,6 +106,7 @@ export const MOONSHOT_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'kimi-k2.6-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 95, // $0.95 per 1M
@@ -126,6 +129,7 @@ export const MOONSHOT_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedVariants: { fast: 'kimi-k2.7-code-highspeed' },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 95,

src/backend/drivers/ai-chat/providers/openai/OpenAiChatCompletionsProvider.ts

@@ -20,6 +20,7 @@
 import { HttpError } from '@heyputer/backend/src/core/http/HttpError.js';
 import { OpenAI } from 'openai';
 import { ChatCompletionCreateParams } from 'openai/resources/index.js';
+import { servedServiceSpeed } from '../../utils/serviceSpeed.js';
 import { Context } from '../../../../core/context.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
 import type {
@@ -117,6 +118,7 @@ export class OpenAiChatProvider implements IChatProvider {
 
     async complete(
         params: ICompleteArguments,
+        resolved?: IChatModel,
     ): ReturnType<IChatProvider['complete']> {
         const {
             max_tokens,
@@ -134,6 +136,11 @@ export class OpenAiChatProvider implements IChatProvider {
         } = params;
         let { messages, model } = params;
         const cacheOptions = promptCacheOptionsToWire(prompt_cache_options);
+        if (params.service_tier === 'ultrafast' && this.#responsesProvider) {
+            return resolved
+                ? this.#responsesProvider.complete(params, resolved)
+                : this.#responsesProvider.complete(params);
+        }
         if (
             tools?.filter((e) => isWebSearchTool(e as Record<string, unknown>))
                 .length
@@ -147,7 +154,9 @@ export class OpenAiChatProvider implements IChatProvider {
                     { legacyCode: 'bad_request' },
                 );
             }
-            return await this.#responsesProvider.complete(params);
+            return await (resolved
+                ? this.#responsesProvider.complete(params, resolved)
+                : this.#responsesProvider.complete(params));
         }
         // Inline compaction is a Responses-API feature; chat.completions can't
         // express `context_management` or a `compaction` content block.
@@ -161,7 +170,9 @@ export class OpenAiChatProvider implements IChatProvider {
                     { legacyCode: 'bad_request' },
                 );
             }
-            return await this.#responsesProvider.complete(params);
+            return await (resolved
+                ? this.#responsesProvider.complete(params, resolved)
+                : this.#responsesProvider.complete(params));
         }
         // Only the Responses API writes 12h cache entries or takes a lifetime
         // on a `prompt_cache_breakpoint`; Chat Completions rejects both.
@@ -176,7 +187,9 @@ export class OpenAiChatProvider implements IChatProvider {
                     { legacyCode: 'bad_request' },
                 );
             }
-            return await this.#responsesProvider.complete(params);
+            return await (resolved
+                ? this.#responsesProvider.complete(params, resolved)
+                : this.#responsesProvider.complete(params));
         }
         // Validate messages
         if (!Array.isArray(messages)) {
@@ -189,9 +202,11 @@ export class OpenAiChatProvider implements IChatProvider {
         model = model ?? this.#defaultModel;
 
         const modelUsed =
-            this.models().find((m) =>
+            resolved ??
+            (this.models().find((m) =>
                 [m.id, ...(m.aliases || [])].includes(model),
-            ) || this.models().find((m) => m.id === this.getDefaultModel())!;
+            ) ||
+                this.models().find((m) => m.id === this.getDefaultModel())!);
 
         // messages.unshift({
         //     role: 'system',
@@ -248,6 +263,9 @@ export class OpenAiChatProvider implements IChatProvider {
                 : {}),
             messages: messages,
             model: modelUsed.id,
+            ...(params.service_tier !== undefined
+                ? { service_tier: params.service_tier }
+                : {}),
             ...(mappedTools?.length ? { tools: mappedTools } : {}),
             ...(max_tokens !== undefined
                 ? { max_completion_tokens: max_tokens }
@@ -284,7 +302,13 @@ export class OpenAiChatProvider implements IChatProvider {
         );
 
         return OpenAiUtil.handle_completion_output({
-            usage_calculator: ({ usage, setUsageCosts, setUsageDetails }) => {
+            usage_calculator: ({
+                usage,
+                service_tier,
+                setUsageCosts,
+                setUsageDetails,
+            }) => {
+                const serviceSpeed = servedServiceSpeed({ service_tier });
                 // GPT-5.6 and later report cache writes inside
                 // `prompt_tokens`, like cached reads; Chat Completions only
                 // writes the default 30m entries, billed at 1.25x input.
@@ -296,13 +320,17 @@ export class OpenAiChatProvider implements IChatProvider {
                     this.meteringModelKey(modelUsed.id),
                     modelUsed,
                     trackedUsage,
+                    { serviceSpeed },
                 );
                 setUsageCosts(metered.costs);
-                setUsageDetails(
-                    OpenAiUtil.usageDetailsFromTrackedUsage(metered.usage, {
+                setUsageDetails({
+                    ...OpenAiUtil.usageDetailsFromTrackedUsage(metered.usage, {
                         writeTtl: '30m',
                     })!,
-                );
+                    ...(params.serviceSpeed !== undefined
+                        ? { serviceSpeed }
+                        : {}),
+                });
                 return metered.usage;
             },
             stream,

src/backend/drivers/ai-chat/providers/openai/OpenAiChatResponsesProvider.ts

@@ -19,6 +19,7 @@
 
 import { OpenAI } from 'openai';
 import { ResponseCreateParams } from 'openai/resources/responses/responses.mjs';
+import { servedServiceSpeed } from '../../utils/serviceSpeed.js';
 import { Context } from '../../../../core/context.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
 import type {
@@ -134,38 +135,42 @@ export class OpenAiResponsesChatProvider implements IChatProvider {
         return rate ? { extraCost: rate } : {};
     }
 
-    async complete({
-        messages,
-        model,
-        max_tokens,
-        moderation,
-        tools,
-        tool_choice,
-        parallel_tool_calls,
-        include,
-        conversation,
-        compaction,
-        context_management,
-        previous_response_id,
-        instructions,
-        metadata,
-        prompt,
-        prompt_cache_key,
-        prompt_cache_retention,
-        prompt_cache_options,
-        store,
-        top_p,
-        truncation,
-        background,
-        service_tier,
-        verbosity,
-        stream,
-        reasoning,
-        reasoning_effort,
-        temperature,
-        text,
-        outputFormat,
-    }: ICompleteArguments): ReturnType<IChatProvider['complete']> {
+    async complete(
+        {
+            messages,
+            model,
+            max_tokens,
+            moderation,
+            tools,
+            tool_choice,
+            parallel_tool_calls,
+            include,
+            conversation,
+            compaction,
+            context_management,
+            previous_response_id,
+            instructions,
+            metadata,
+            prompt,
+            prompt_cache_key,
+            prompt_cache_retention,
+            prompt_cache_options,
+            store,
+            top_p,
+            truncation,
+            background,
+            service_tier,
+            serviceSpeed: requestedServiceSpeed,
+            verbosity,
+            stream,
+            reasoning,
+            reasoning_effort,
+            temperature,
+            text,
+            outputFormat,
+        }: ICompleteArguments,
+        resolved?: IChatModel,
+    ): ReturnType<IChatProvider['complete']> {
         // Validate messages
         if (!Array.isArray(messages)) {
             throw new HttpError(400, '`messages` must be an array', {
@@ -183,12 +188,13 @@ export class OpenAiResponsesChatProvider implements IChatProvider {
         model = model ?? this.#defaultModel;
 
         const modelUsed =
-            this.models({ no_restrictions: true }).find((m) =>
+            resolved ??
+            (this.models({ no_restrictions: true }).find((m) =>
                 [m.id, ...(m.aliases || [])].includes(model),
             ) ||
-            this.models({ no_restrictions: true }).find(
-                (m) => m.id === this.getDefaultModel(),
-            )!;
+                this.models({ no_restrictions: true }).find(
+                    (m) => m.id === this.getDefaultModel(),
+                )!);
 
         // messages.unshift({
         //     role: 'system',
@@ -322,6 +328,7 @@ export class OpenAiResponsesChatProvider implements IChatProvider {
         return OpenAiUtil.handle_completion_output_responses_api({
             usage_calculator: ({
                 usage,
+                service_tier,
                 webSearchCalls,
                 setUsageCosts,
                 setUsageDetails,
@@ -347,23 +354,31 @@ export class OpenAiResponsesChatProvider implements IChatProvider {
                     // model is a reasoning model, not a static per-model
                     // cost-table entry — the model's rates would otherwise
                     // price it (wrongly) at the input/output token rate.
-                    webSearchCalls
-                        ? {
-                              costOverrides: {
-                                  web_search_calls:
-                                      webSearchCalls *
-                                      (webSearchCallRate(tools, modelUsed.id) ??
-                                          0),
-                              },
-                          }
-                        : {},
+                    {
+                        serviceSpeed: servedServiceSpeed({ service_tier }),
+                        ...(webSearchCalls
+                            ? {
+                                  costOverrides: {
+                                      web_search_calls:
+                                          webSearchCalls *
+                                          (webSearchCallRate(
+                                              tools,
+                                              modelUsed.id,
+                                          ) ?? 0),
+                                  },
+                              }
+                            : {}),
+                    },
                 );
                 setUsageCosts?.(metered.costs);
-                setUsageDetails?.(
-                    OpenAiUtil.usageDetailsFromTrackedUsage(metered.usage, {
+                setUsageDetails?.({
+                    ...(requestedServiceSpeed !== undefined
+                        ? { serviceSpeed: servedServiceSpeed({ service_tier }) }
+                        : {}),
+                    ...OpenAiUtil.usageDetailsFromTrackedUsage(metered.usage, {
                         writeTtl: '30m',
                     })!,
-                );
+                });
                 return metered.usage;
             },
             stream,

src/backend/drivers/ai-chat/providers/openai/models.ts

@@ -46,6 +46,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 100,
@@ -72,6 +73,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2, ultrafast: 6 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -98,6 +100,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -124,6 +127,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 10,
@@ -150,6 +154,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2, ultrafast: 6 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 1000,
@@ -176,6 +181,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
         // OpenAI's promotional pricing, guaranteed only through 2026-11-21.
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 400,
@@ -201,6 +207,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -226,6 +233,7 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 20,
@@ -251,6 +259,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 1250,
+                cached_tokens: 125,
+                completion_tokens: 7500,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 500,
@@ -295,6 +310,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 500,
+                cached_tokens: 50,
+                completion_tokens: 3000,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -338,6 +360,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 150,
+                cached_tokens: 15,
+                completion_tokens: 900,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 75,
@@ -425,6 +454,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 350,
+                cached_tokens: 35,
+                completion_tokens: 2800,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 175,
@@ -446,6 +482,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 250,
+                cached_tokens: 25,
+                completion_tokens: 2000,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -467,6 +510,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 425,
+                cached_tokens: 212.5,
+                completion_tokens: 1700,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,
@@ -490,6 +540,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 25,
+                cached_tokens: 12.5,
+                completion_tokens: 100,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 15,
@@ -509,6 +566,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 350,
+                cached_tokens: 87.5,
+                completion_tokens: 1400,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -530,6 +594,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 70,
+                cached_tokens: 17.5,
+                completion_tokens: 280,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 40,
@@ -571,6 +642,13 @@ export const OPEN_AI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: {
+            fast: {
+                prompt_tokens: 425,
+                cached_tokens: 212.5,
+                completion_tokens: 1700,
+            },
+        },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 250,

src/backend/drivers/ai-chat/providers/openrouter/OpenRouterProvider.test.ts

@@ -20,15 +20,14 @@
 /**
  * Offline unit tests for OpenRouterProvider.
  *
- * Boots a real PuterServer (in-memory sqlite + dynamo + s3 + mock
- * redis) and constructs OpenRouterProvider directly against the live
- * wired `MeteringService` so the recording side is exercised end-to-
- * end. OpenRouter is OpenAI-compatible, so the OpenAI SDK is mocked
- * at the module boundary; the model catalog is fetched via `axios`
- * which is mocked at its module boundary too. Both are the real
- * network egress points.
- * The companion integration test (OpenRouterProvider.integration.test.ts)
- * exercises the real OpenRouter endpoint.
+ * Boots a real PuterServer (in-memory sqlite + dynamo + s3 + mock redis) and
+ * constructs OpenRouterProvider directly against the live wired
+ * `MeteringService` so the recording side is exercised end-to- end. OpenRouter
+ * is OpenAI-compatible, so the OpenAI SDK is mocked at the module boundary; the
+ * model catalog is fetched via `axios` which is mocked at its module boundary
+ * too. Both are the real network egress points. The companion integration test
+ * (OpenRouterProvider.integration.test.ts) exercises the real OpenRouter
+ * endpoint.
  */
 
 import { Writable } from 'node:stream';
@@ -300,16 +299,20 @@ describe('OpenRouterProvider model catalog', () => {
     it('coerces string prices and normalizes conditional tiers', async () => {
         const { provider } = makeProvider();
         const models = await provider.models();
-        const sol = models.find((m) => m.id === 'openrouter:openai/gpt-6.1-sol')!;
+        const sol = models.find(
+            (m) => m.id === 'openrouter:openai/gpt-6.1-sol',
+        )!;
         expect(sol.costs).toEqual({
             tokens: 1_000_000,
             prompt: 200,
             completion: 1000,
         });
-        expect(sol.pricingOverrides).toEqual([{
-            minPromptTokens: 272000,
-            costs: { prompt: 400, completion: 1500 },
-        }]);
+        expect(sol.pricingOverrides).toEqual([
+            {
+                minPromptTokens: 272000,
+                costs: { prompt: 400, completion: 1500 },
+            },
+        ]);
     });
 
     it('caches the coerced model list after the first axios round-trip', async () => {
@@ -368,9 +371,12 @@ describe('OpenRouterProvider model catalog', () => {
 
     it('does not reinterpret catalog-added timestamps as release dates', async () => {
         const { provider } = makeProvider();
-        expect((await provider.models()).every(model => model.release_date === undefined)).toBe(true);
+        expect(
+            (await provider.models()).every(
+                (model) => model.release_date === undefined,
+            ),
+        ).toBe(true);
     });
-
 });
 
 // ── Disallowed model gate ───────────────────────────────────────────
@@ -868,11 +874,14 @@ describe('OpenRouterProvider billed cost through the driver', () => {
             event.factor = factor;
         };
         server.clients.event.on('ai.cost.factor.*', listener as never);
-        return () => server.clients.event.off('ai.cost.factor.*', listener as never);
+        return () =>
+            server.clients.event.off('ai.cost.factor.*', listener as never);
     };
 
-    /** µ¢ the ledger was handed for every usage recorded so far. */
-    const ledgerTotal = (spy: MockInstance<MeteringService['batchIncrementUsages']>) =>
+    /** Μ¢ the ledger was handed for every usage recorded so far. */
+    const ledgerTotal = (
+        spy: MockInstance<MeteringService['batchIncrementUsages']>,
+    ) =>
         spy.mock.calls
             .flatMap(([, usages]) => usages)
             .reduce((total, usage) => total + (usage.costOverride ?? 0), 0);
@@ -928,7 +937,10 @@ describe('OpenRouterProvider billed cost through the driver', () => {
     it('reports what a billed completion was charged, after the cost factor', async () => {
         const driver = await makeDriver();
         const stopFactor = withCostFactor(1.6);
-        const recorded = vi.spyOn(server.services.metering, 'batchIncrementUsages');
+        const recorded = vi.spyOn(
+            server.services.metering,
+            'batchIncrementUsages',
+        );
         createMock.mockResolvedValueOnce({
             choices: [
                 {
@@ -1023,7 +1035,10 @@ describe('OpenRouterProvider billed cost through the driver', () => {
     it('ends a stream with what it was charged at the catalog rates, after the cost factor', async () => {
         const driver = await makeDriver();
         const stopFactor = withCostFactor(1.6);
-        const recorded = vi.spyOn(server.services.metering, 'batchIncrementUsages');
+        const recorded = vi.spyOn(
+            server.services.metering,
+            'batchIncrementUsages',
+        );
         createMock.mockReturnValueOnce(
             asAsyncIterable([
                 { choices: [{ delta: { content: 'hello' } }] },
@@ -1126,31 +1141,180 @@ describe('OpenRouterProvider.checkModeration', () => {
     });
 });
 
-
 describe('OpenRouter catalog refresh validation', () => {
     it('keeps missing model fields and prices unknown and blocks unpriced inference', async () => {
-        axiosRequestMock.mockResolvedValue({ data: { data: [{ id: 'fixture/model', name: 'Fixture' }] } });
+        axiosRequestMock.mockResolvedValue({
+            data: { data: [{ id: 'fixture/model', name: 'Fixture' }] },
+        });
         const { provider } = makeProvider();
         const [model] = await provider.models();
         expect(model.costs).toEqual({ tokens: 1_000_000 });
         expect(model.context).toBeUndefined();
         expect(model.max_tokens).toBe(0);
-        await expect(withTestActor(() => provider.complete({ model: 'openrouter:fixture/model', messages: [] })))
-            .rejects.toMatchObject({ legacyCode: 'model_pricing_unavailable' });
+        await expect(
+            withTestActor(() =>
+                provider.complete({
+                    model: 'openrouter:fixture/model',
+                    messages: [],
+                }),
+            ),
+        ).rejects.toMatchObject({ legacyCode: 'model_pricing_unavailable' });
         expect(createMock).not.toHaveBeenCalled();
     });
 
-    it.each(['malformed', 'failed', 'ambiguous conditional price'])('retains last-good data after a %s refresh', async failure => {
-        vi.useFakeTimers({ toFake: ['Date'] });
-        vi.spyOn(console, 'warn').mockImplementation(() => {});
+    it.each(['malformed', 'failed', 'ambiguous conditional price'])(
+        'retains last-good data after a %s refresh',
+        async (failure) => {
+            vi.useFakeTimers({ toFake: ['Date'] });
+            vi.spyOn(console, 'warn').mockImplementation(() => {});
+            const { provider } = makeProvider();
+            const good = await provider.models();
+            vi.advanceTimersByTime(15 * 60 * 1000 + 1);
+            if (failure === 'failed')
+                axiosRequestMock.mockRejectedValueOnce(
+                    new Error('unavailable'),
+                );
+            else if (failure === 'malformed')
+                axiosRequestMock.mockResolvedValueOnce({ data: {} });
+            else
+                axiosRequestMock.mockResolvedValueOnce({
+                    data: {
+                        data: [
+                            {
+                                ...SAMPLE_API_MODELS[0],
+                                pricing: {
+                                    prompt: '0.000002',
+                                    overrides: [
+                                        { min_prompt_tokens: 10, prompt: '' },
+                                    ],
+                                },
+                            },
+                        ],
+                    },
+                });
+            expect(await provider.models()).toBe(good);
+        },
+    );
+});
+
+describe('OpenRouter service speed offerings', () => {
+    it('loads and caches tier prices while reserving for endpoint and context differences', async () => {
         const { provider } = makeProvider();
-        const good = await provider.models();
-        vi.advanceTimersByTime(15 * 60 * 1000 + 1);
-        if (failure === 'failed') axiosRequestMock.mockRejectedValueOnce(new Error('unavailable'));
-        else if (failure === 'malformed') axiosRequestMock.mockResolvedValueOnce({ data: {} });
-        else axiosRequestMock.mockResolvedValueOnce({ data: { data: [{ ...SAMPLE_API_MODELS[0], pricing: {
-            prompt: '0.000002', overrides: [{ min_prompt_tokens: 10, prompt: '' }],
-        } }] } });
-        expect(await provider.models()).toBe(good);
+        const base = {
+            ...(await provider.models())[0],
+            provider: 'openrouter',
+        };
+        axiosRequestMock.mockClear();
+        axiosRequestMock.mockResolvedValueOnce({
+            data: {
+                data: {
+                    endpoints: [
+                        {
+                            service_tier: 'priority',
+                            pricing: {
+                                prompt: '0.000004',
+                                completion: '0.00002',
+                                input_cache_read: '0.0000002',
+                            },
+                        },
+                        {
+                            service_tier: 'priority',
+                            pricing: {
+                                prompt: '0.000005',
+                                completion: '0.00001',
+                            },
+                        },
+                        {
+                            service_tier: 'ultrafast',
+                            pricing: {
+                                prompt: '0.000012',
+                                completion: '0.00006',
+                                overrides: [
+                                    {
+                                        min_prompt_tokens: 272000,
+                                        prompt: '0.000024',
+                                        completion: '0.00009',
+                                    },
+                                ],
+                            },
+                        },
+                        {
+                            service_tier: 'priority',
+                            pricing: { prompt: 'invalid' },
+                        },
+                    ],
+                },
+            },
+        });
+        const offers = await provider.serviceSpeedModels(base);
+        expect(offers.fast?.costs).toMatchObject({
+            prompt: 500,
+            completion: 2000,
+            input_cache_read: 20,
+        });
+        expect(offers.ultrafast?.costs).toMatchObject({
+            prompt: 2400,
+            completion: 9000,
+        });
+        expect(await provider.serviceSpeedModels(base)).toBe(offers);
+        expect(axiosRequestMock).toHaveBeenCalledTimes(1);
+    });
+
+    it('uses standard when the tier catalog cannot be fetched', async () => {
+        const { provider } = makeProvider();
+        const base = {
+            ...(await provider.models())[0],
+            provider: 'openrouter',
+        };
+        axiosRequestMock.mockRejectedValueOnce(new Error('Unavailable'));
+        expect(await provider.serviceSpeedModels(base)).toEqual({});
+    });
+});
+
+describe('OpenRouter speed billing', () => {
+    it('requires an authoritative bill instead of charging the reservation ceiling', async () => {
+        const { selectServiceSpeed } =
+            await import('../../utils/serviceSpeed.js');
+        const { provider } = makeProvider();
+        const base = {
+            ...(await provider.models())[0],
+            provider: 'openrouter',
+        };
+        const selected = selectServiceSpeed(
+            base,
+            {
+                model: base.id,
+                messages: [{ role: 'user', content: 'Hello' }],
+                serviceSpeed: 'fast',
+            },
+            () => undefined,
+            {
+                fast: {
+                    ...base,
+                    costs: { ...base.costs, prompt: 500, completion: 2000 },
+                },
+            },
+        );
+        const completion = {
+            choices: [
+                {
+                    index: 0,
+                    message: { role: 'assistant', content: 'OK' },
+                    finish_reason: 'stop',
+                },
+            ],
+            usage: { prompt_tokens: 10, completion_tokens: 1 },
+        };
+        createMock.mockResolvedValueOnce({
+            ...completion,
+            service_tier: 'priority',
+            usage: { ...completion.usage, cost: undefined },
+        });
+        await expect(
+            withTestActor(() =>
+                provider.complete(selected.args, selected.model),
+            ),
+        ).rejects.toMatchObject({ legacyCode: 'model_pricing_unavailable' });
+        expect(recordSpy).not.toHaveBeenCalled();
     });
 });

src/backend/drivers/ai-chat/providers/openrouter/OpenRouterProvider.ts

@@ -22,8 +22,10 @@ import { OpenAI } from 'openai';
 import { HttpError, isHttpError } from '../../../../core/http/HttpError.js';
 import { UpstreamResponseError } from '../../../util/upstreamErrors.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
-import type { IChatModel, ICompleteArguments } from '../../types.js';
+import type { IChatModel, ICompleteArguments, ModelCost } from '../../types.js';
+import { BoundedTtlMap } from '../../../../util/boundedTtlMap.js';
 import { cachedRemoteCatalog } from '../../utils/cachedRemoteCatalog.js';
+import { servedServiceSpeed } from '../../utils/serviceSpeed.js';
 import { catalogPrice } from '../../utils/pricing.js';
 import { mapOpenRouterPricing } from './pricing.js';
 import { sdkClientOptions } from '../../utils/sdkClient.js';
@@ -64,6 +66,75 @@ const isPolicyBlock = (err: unknown): boolean => {
 export class OpenRouterProvider extends OpenAICompatProvider {
     #apiBaseUrl: string;
 
+    #speedCatalogs = new BoundedTtlMap<
+        string,
+        () => Promise<Partial<Record<'fast' | 'ultrafast', IChatModel>>>
+    >({ maxEntries: 256 });
+
+    async serviceSpeedModels(model: IChatModel) {
+        let load = this.#speedCatalogs.get(model.id);
+        if (!load) {
+            load = cachedRemoteCatalog({
+                name: 'OpenRouter speed catalog',
+                fallback: {} as Partial<
+                    Record<'fast' | 'ultrafast', IChatModel>
+                >,
+                fetch: async (signal) => {
+                    const id = model.id.replace(/^openrouter:/, '');
+                    const response = await axios.request({
+                        url: `${this.#apiBaseUrl}/models/${id}/endpoints`,
+                        method: 'GET',
+                        signal,
+                        maxContentLength: 2 * 1024 * 1024,
+                    });
+                    const offers: Partial<
+                        Record<'fast' | 'ultrafast', IChatModel>
+                    > = {};
+                    for (const endpoint of response.data?.data?.endpoints ??
+                        []) {
+                        const speed =
+                            endpoint.service_tier === 'ultrafast'
+                                ? 'ultrafast'
+                                : ['priority', 'fast'].includes(
+                                        endpoint.service_tier,
+                                    )
+                                  ? 'fast'
+                                  : undefined;
+                        if (!speed || !endpoint.pricing) continue;
+                        const pricing = mapOpenRouterPricing(endpoint.pricing);
+                        if (
+                            pricing.costs.prompt === undefined ||
+                            pricing.costs.completion === undefined
+                        )
+                            continue;
+                        // Reserve for the most expensive eligible endpoint and context tier.
+                        const costs: ModelCost = {
+                            ...offers[speed]?.costs,
+                            tokens: model.costs.tokens,
+                        };
+                        for (const rates of [
+                            pricing.costs,
+                            ...pricing.overrides.map(
+                                (override) => override.costs,
+                            ),
+                        ]) {
+                            for (const [key, value] of Object.entries(rates))
+                                costs[key] = Math.max(costs[key] ?? 0, value);
+                        }
+                        offers[speed] = {
+                            ...model,
+                            costs,
+                            pricingOverrides: [],
+                        };
+                    }
+                    return offers;
+                },
+            });
+            this.#speedCatalogs.set(model.id, load);
+        }
+        return load();
+    }
+
     constructor(config: ChatProviderConfig, meteringService: MeteringService) {
         const apiBaseUrl = config.apiBaseUrl || 'https://openrouter.ai/api/v1';
         super(meteringService, {
@@ -202,8 +273,17 @@ export class OpenRouterProvider extends OpenAICompatProvider {
         return { ...params, usage: { include: true } };
     }
 
-    protected override meteredUsage(source: UsageSource) {
+    protected override meteredUsage(source: UsageSource, model: IChatModel) {
         const usage = source.usage as OpenrouterUsage;
+        if (
+            model.serviceSpeedPricing &&
+            servedServiceSpeed(source) !== 'standard' &&
+            catalogPrice(usage.cost) === undefined
+        ) {
+            throw new HttpError(503, 'Service tier billing is unavailable', {
+                legacyCode: 'model_pricing_unavailable',
+            });
+        }
         return {
             usage: {
                 prompt:

src/backend/drivers/ai-chat/providers/xai/XAIProvider.test.ts

@@ -20,13 +20,12 @@
 /**
  * Offline unit tests for XAIProvider.
  *
- * Boots a real PuterServer (in-memory sqlite + dynamo + s3 + mock
- * redis) and constructs XAIProvider directly against the live wired
- * `MeteringService` so the recording side is exercised end-to-end.
- * xAI is OpenAI-compatible so the OpenAI SDK is mocked at the module
- * boundary; that's the real network egress point. The companion
- * integration test (XAIProvider.integration.test.ts) exercises the
- * real xAI endpoint.
+ * Boots a real PuterServer (in-memory sqlite + dynamo + s3 + mock redis) and
+ * constructs XAIProvider directly against the live wired `MeteringService` so
+ * the recording side is exercised end-to-end. xAI is OpenAI-compatible so the
+ * OpenAI SDK is mocked at the module boundary; that's the real network egress
+ * point. The companion integration test (XAIProvider.integration.test.ts)
+ * exercises the real xAI endpoint.
  */
 
 import { Writable } from 'node:stream';
@@ -933,8 +932,7 @@ describe('XAIProvider.complete non-stream output', () => {
         // namespace, actor, and a costsOverride priced from
         // models.ts (grok-4.6: prompt=200, completion=600, cached=50).
         expect(recordSpy).toHaveBeenCalledTimes(1);
-        const [usage, actor, prefix, overrides] =
-            recordSpy.mock.calls[0]!;
+        const [usage, actor, prefix, overrides] = recordSpy.mock.calls[0]!;
         expect(usage).toEqual({
             prompt_tokens: 90,
             completion_tokens: 50,
@@ -1022,8 +1020,7 @@ describe('XAIProvider.complete non-stream output', () => {
             }),
         );
 
-        const [usage, , , overrides] =
-            recordSpy.mock.calls[0]!;
+        const [usage, , , overrides] = recordSpy.mock.calls[0]!;
         expect(usage.cached_tokens).toBe(0);
         // 0 cached tokens × any rate = 0 metered cost.
         expect(overrides).toMatchObject({ cached_tokens: 0 });
@@ -1081,8 +1078,7 @@ describe('XAIProvider.complete streaming', () => {
 
         // grok-build-0.1 costs: prompt=100, completion=200, cached=20.
         expect(recordSpy).toHaveBeenCalledTimes(1);
-        const [, , prefix, overrides] =
-            recordSpy.mock.calls[0]!;
+        const [, , prefix, overrides] = recordSpy.mock.calls[0]!;
         expect(prefix).toBe('xai:grok-build-0.1');
         expect(overrides).toEqual({
             prompt_tokens: 3 * 100,
@@ -1200,3 +1196,60 @@ describe('XAIProvider.checkModeration', () => {
         );
     });
 });
+
+describe('xAI service speed billing', () => {
+    it('records the reported Priority charge with cached input and reasoning', async () => {
+        const { selectServiceSpeed } =
+            await import('../../utils/serviceSpeed.js');
+        const { provider } = makeProvider();
+        const base = {
+            ...(await provider.models()).find(
+                (entry) => entry.id === 'grok-4.7',
+            )!,
+            provider: 'xai',
+        };
+        const selected = selectServiceSpeed(
+            base,
+            {
+                model: base.id,
+                messages: [{ role: 'user', content: 'Hello' }],
+                serviceSpeed: 'ultrafast',
+            },
+            () => undefined,
+        );
+        createMock.mockResolvedValueOnce({
+            choices: [
+                {
+                    index: 0,
+                    message: { role: 'assistant', content: 'OK' },
+                    finish_reason: 'stop',
+                },
+            ],
+            service_tier: 'priority',
+            usage: {
+                prompt_tokens: 1247,
+                completion_tokens: 1,
+                total_tokens: 1282,
+                prompt_tokens_details: { cached_tokens: 1152 },
+                completion_tokens_details: { reasoning_tokens: 34 },
+                cost_in_usd_ticks: 19520000,
+            },
+        });
+        const result = await withTestActor(() =>
+            provider.complete(selected.args, selected.model),
+        );
+        expect(result).toMatchObject({
+            usageDetails: {
+                serviceSpeed: 'fast',
+                outputTokens: 35,
+                reasoningTokens: 34,
+            },
+        });
+        expect(recordSpy).toHaveBeenCalledWith(
+            expect.objectContaining({ billedUsage: 1, completion_tokens: 35 }),
+            expect.anything(),
+            'xai:grok-4.7',
+            expect.objectContaining({ billedUsage: 195200 }),
+        );
+    });
+});

src/backend/drivers/ai-chat/providers/xai/XAIProvider.ts

@@ -19,6 +19,8 @@
 
 import { OpenAI } from 'openai';
 import { ChatCompletionCreateParams } from 'openai/resources/index.js';
+import { catalogPrice } from '../../utils/pricing.js';
+import { servedServiceSpeed } from '../../utils/serviceSpeed.js';
 import { Context } from '../../../../core/context.js';
 import type { MeteringService } from '../../../../services/metering/MeteringService.js';
 import * as OpenAIUtil from '../../utils/OpenAIUtil.js';
@@ -74,7 +76,15 @@ export class XAIProvider implements IChatProvider {
     }
 
     async complete(
-        { messages, stream, model, tools, max_tokens }: ICompleteArguments,
+        {
+            messages,
+            stream,
+            model,
+            tools,
+            max_tokens,
+            service_tier,
+            serviceSpeed: requestedServiceSpeed,
+        }: ICompleteArguments,
         resolved?: IChatModel,
     ): Promise<IChatCompleteResult> {
         const actor = Context.get('actor');
@@ -88,6 +98,7 @@ export class XAIProvider implements IChatProvider {
                 {
                     messages,
                     model: modelUsed.id,
+                    ...(service_tier !== undefined ? { service_tier } : {}),
                     ...(tools ? { tools } : {}),
                     ...(max_tokens !== undefined ? { max_tokens } : {}),
                     stream,
@@ -107,18 +118,49 @@ export class XAIProvider implements IChatProvider {
         }
 
         return OpenAIUtil.handle_completion_output({
-            usage_calculator: ({ usage, setUsageCosts }) => {
+            usage_calculator: ({
+                usage,
+                service_tier: servedTier,
+                setUsageCosts,
+                setUsageDetails,
+            }) => {
+                const serviceSpeed = servedServiceSpeed({
+                    service_tier: servedTier,
+                });
                 // xAI reports cached reads inside `prompt_tokens`; bill them
                 // only at the cached rate.
                 const metered = OpenAIUtil.extractMeteredUsage(usage);
+                const reasoningTokens =
+                    usage.completion_tokens_details?.reasoning_tokens ?? 0;
+                const trackedUsage = OpenAIUtil.splitCachedPrompt(usage);
+                trackedUsage.completion_tokens += reasoningTokens;
+                const reportedTicks = catalogPrice(
+                    (usage as typeof usage & { cost_in_usd_ticks?: number })
+                        .cost_in_usd_ticks,
+                );
                 const { costs } = meterChatUsage(
                     this.#meteringService,
                     actor,
                     this.meteringModelKey(modelUsed.id),
                     modelUsed,
-                    OpenAIUtil.splitCachedPrompt(usage),
+                    trackedUsage,
+                    {
+                        serviceSpeed,
+                        authoritativeUsd:
+                            reportedTicks === undefined
+                                ? undefined
+                                : reportedTicks / 10_000_000_000,
+                    },
                 );
                 setUsageCosts(costs);
+                if (requestedServiceSpeed !== undefined)
+                    setUsageDetails?.({
+                        ...OpenAIUtil.usageDetailsFromTrackedUsage(
+                            trackedUsage,
+                        )!,
+                        serviceSpeed,
+                        ...(reasoningTokens ? { reasoningTokens } : {}),
+                    });
                 return metered;
             },
             stream,

src/backend/drivers/ai-chat/providers/xai/models.ts

@@ -42,6 +42,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -65,6 +66,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -87,6 +89,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 200,
@@ -109,6 +112,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -151,6 +155,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -186,6 +191,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -217,6 +223,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 125,
@@ -246,6 +253,7 @@ export const XAI_MODELS: IChatModel[] = [
         costs_currency: 'usd-cents',
         input_cost_key: 'prompt_tokens',
         output_cost_key: 'completion_tokens',
+        serviceSpeedRates: { fast: 2 },
         costs: {
             tokens: 1_000_000,
             prompt_tokens: 100,

src/backend/drivers/ai-chat/types.ts

@@ -26,6 +26,8 @@
 
 export type ModelCost = Record<string, number>;
 
+export type ServiceSpeed = 'standard' | 'fast' | 'ultrafast';
+
 export interface ModelModalities {
     input: string[];
     output: string[];
@@ -67,6 +69,22 @@ export interface IChatModel<T extends ModelCost = ModelCost> extends Record<
         output_multiplier: number;
     };
     pricingOverrides?: ModelPricingOverride[];
+    /**
+     * A token-rate multiplier or explicit per-key rates merged with standard
+     * costs.
+     */
+    serviceSpeedRates?: Partial<
+        Record<'fast' | 'ultrafast', number | ModelCost>
+    >;
+    serviceSpeedVariants?: { fast?: string };
+    /** Request-local pricing snapshot; never part of the model catalog. */
+    serviceSpeedPricing?: {
+        speed: ServiceSpeed;
+        standardCosts: ModelCost;
+        standardOverrides?: ModelPricingOverride[];
+        fastCosts?: ModelCost;
+        ultrafastCosts?: ModelCost;
+    };
     context?: number;
     max_tokens: number;
     subscriberOnly?: boolean;
@@ -76,6 +94,8 @@ export interface IChatModel<T extends ModelCost = ModelCost> extends Record<
     tool_call?: boolean;
     responses_api?: boolean;
     responses_api_only?: boolean;
+    /** Restricts service speeds for deployments with a limited API dialect. */
+    serviceSpeeds?: ServiceSpeed[];
     /**
      * Omitted preserves sampling; reasoningDisabled requires explicit effort
      * none.
@@ -163,6 +183,7 @@ export interface UsageDetails {
     webFetchRequests?: number;
     speed?: 'fast' | 'standard';
     serviceTier?: string;
+    serviceSpeed?: ServiceSpeed;
     /**
      * Per-pass breakdown when the upstream ran several passes (compaction,
      * advisor).
@@ -198,6 +219,7 @@ export interface ICompleteArguments {
      * request on another provider that serves the same model.
      */
     fallback?: boolean;
+    serviceSpeed?: ServiceSpeed;
     stream?: boolean;
     model: string;
     test_mode?: boolean;
@@ -217,10 +239,7 @@ export interface ICompleteArguments {
     taskBudget?: { total: number; remaining?: number };
     /** Claude only: top-level automatic `cache_control`. */
     cacheControl?: CacheControl;
-    /**
-     * Claude only; forwarded only when the model's catalog entry has
-     * `fast_output_tokens`.
-     */
+    /** Claude only; fast is forwarded when the catalog declares fast rates. */
     speed?: 'fast' | 'standard';
     /** Claude only. */
     safeguards?: SafeguardRequest[];
@@ -260,7 +279,15 @@ export interface ICompleteArguments {
     truncation?: 'auto' | 'disabled' | undefined;
     background?: boolean;
     service_tier?:
-        'auto' | 'default' | 'flex' | 'scale' | 'priority' | undefined;
+        | 'auto'
+        | 'default'
+        | 'flex'
+        | 'scale'
+        | 'priority'
+        | 'fast'
+        | 'ultrafast'
+        | 'standard'
+        | undefined;
     max_tokens?: number;
     temperature?: number;
     reasoning?: { effort: ReasoningEffort } | undefined;
@@ -328,6 +355,10 @@ export interface IChatMessageResult {
 export type IChatCompleteResult = IChatStreamResult | IChatMessageResult;
 
 export interface IChatProvider {
+    /** Account/catalog-specific speed offerings, fetched before the credit hold. */
+    serviceSpeedModels?(
+        model: IChatModel,
+    ): Promise<Partial<Record<'fast' | 'ultrafast', IChatModel>>>;
     models(extra_params?: unknown): IChatModel[] | Promise<IChatModel[]>;
     getDefaultModel(): string;
     /**

src/backend/drivers/ai-chat/utils/OpenAIUtil.js

@@ -650,12 +650,15 @@ export const create_chat_stream_handler =
             block.end();
         };
 
+        let serviceTier;
         let last_usage = null;
         let last_extra_content = null;
         let finish_reason = null;
         for await (let chunk of completion) {
             await chatStream.waitForDrain();
             chunk = deviations.chunk_but_like_actually(chunk);
+            if (chunk.service_tier !== undefined)
+                serviceTier = chunk.service_tier;
             const chunk_usage = deviations.index_usage_from_stream_chunk(chunk);
             if (chunk_usage) last_usage = chunk_usage;
             if (chunk.choices.length < 1) continue;
@@ -746,6 +749,7 @@ export const create_chat_stream_handler =
         const usage = last_usage
             ? usage_calculator({
                   usage: last_usage,
+                  service_tier: serviceTier,
                   extra_content: last_extra_content,
                   setUsageCosts: (c) => chatStream.setUsageCosts(c),
                   setUsageDetails: (d) => {
@@ -779,6 +783,7 @@ export const create_chat_stream_handler_responses_api =
         const message = chatStream.message();
         const textblock = message.contentBlock({ type: 'text' });
 
+        let serviceTier;
         let last_usage = null;
         let completed = false;
         let sawFunctionCall = false;
@@ -787,6 +792,8 @@ export const create_chat_stream_handler_responses_api =
         let toolUsage = null;
         for await (const chunk of completion) {
             await chatStream.waitForDrain();
+            if (chunk.response?.service_tier !== undefined)
+                serviceTier = chunk.response.service_tier;
             if (chunk.type === 'response.failed' || chunk.type === 'error') {
                 throw new Error(
                     chunk.response?.error?.message ??
@@ -918,6 +925,7 @@ export const create_chat_stream_handler_responses_api =
         const usage = last_usage
             ? usage_calculator({
                   usage: last_usage,
+                  service_tier: serviceTier,
                   webSearchCalls,
                   tool_usage: toolUsage,
                   setUsageCosts: (c) => chatStream.setUsageCosts(c),
@@ -972,6 +980,7 @@ export const handle_completion_output = async (
     /**
      * @type {Record<string, unknown> & {
      *     usage_calculator: (args: {
+     *         service_tier?: string;
      *         usage: import('openai/resources/completions.mjs').CompletionUsage;
      *         setUsageCosts: (costs: Record<string, number>) => void;
      *         setUsageDetails: (
@@ -1066,6 +1075,7 @@ export const handle_completion_output = async (
  * @param {((text: string) => Promise<{ flagged: boolean }>) | undefined} [params.moderate]
  * @param {(args: {
  *     usage: import('openai/resources/responses/responses.mjs').ResponseUsage;
+ *     service_tier?: string;
  *     webSearchCalls?: number;
  *     tool_usage?: Record<string, unknown>;
  *     setUsageCosts?: (costs: Record<string, number>) => void;

src/backend/drivers/ai-chat/utils/meterChatUsage.ts

@@ -19,13 +19,15 @@
 
 import type { Actor } from '../../../core/actor.js';
 import type { MeteringService } from '../../../services/metering/MeteringService.js';
-import type { IChatModel } from '../types.js';
+import type { IChatModel, ServiceSpeed } from '../types.js';
+import { serviceSpeedBillingModel } from './serviceSpeed.js';
 import { buildCostsOverride } from './pricing.js';
 
 /** Microcents per US dollar. */
 const MICROCENTS_PER_USD = 100_000_000;
 
 export interface MeterChatUsageOptions {
+    serviceSpeed?: ServiceSpeed;
     /**
      * What the upstream says it billed, in USD. Recorded as one `billedUsage`
      * line instead of pricing the tokens, which are still recorded at zero.
@@ -77,10 +79,15 @@ export const meterChatUsage = (
         authoritativeUsd,
         costOverrides,
         pricingTime,
+        serviceSpeed = 'standard',
     }: MeterChatUsageOptions = {},
 ): { usage: Record<string, number>; costs: Record<string, number> } => {
     const priced = {
-        ...buildCostsOverride(usage, model, pricingTime),
+        ...buildCostsOverride(
+            usage,
+            serviceSpeedBillingModel(model, serviceSpeed),
+            pricingTime,
+        ),
         ...costOverrides,
     };
     if (authoritativeUsd !== undefined) {

src/backend/drivers/ai-chat/utils/serviceSpeed.fuzz.test.ts

@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Puter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Puter. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { describe, expect, it } from 'vitest';
+import type { IChatModel, ServiceSpeed } from '../types.js';
+import { ALIBABA_MODELS } from '../providers/alibaba/models.js';
+import { AZURE_MODELS } from '../providers/azure/models.js';
+import { BYTEPLUS_MODELS } from '../providers/byteplus/models.js';
+import { CLAUDE_MODELS } from '../providers/claude/models.js';
+import { DEEPSEEK_MODELS } from '../providers/deepseek/models.js';
+import { GEMINI_MODELS } from '../providers/gemini/models.js';
+import { GROQ_MODELS } from '../providers/groq/models.js';
+import { HOONIFY_MODELS } from '../providers/hoonify/models.js';
+import { META_MODELS } from '../providers/meta/models.js';
+import { MINIMAX_MODELS } from '../providers/minimax/models.js';
+import { MISTRAL_MODELS } from '../providers/mistral/models.js';
+import { MOONSHOT_MODELS } from '../providers/moonshot/models.js';
+import { OPEN_AI_MODELS } from '../providers/openai/models.js';
+import { XAI_MODELS } from '../providers/xai/models.js';
+import { ZAI_MODELS } from '../providers/zai/models.js';
+import { shouldPresentAsOpenAI } from './normalizeToOpenAI.js';
+import {
+    isServiceSpeedUnavailable,
+    lowerServiceSpeed,
+    selectServiceSpeed,
+    servedServiceSpeed,
+    serviceSpeedBillingModel,
+} from './serviceSpeed.js';
+
+const catalogs: Array<[string, IChatModel[]]> = [
+    ['alibaba', ALIBABA_MODELS],
+    ['azure-openai', AZURE_MODELS],
+    ['byteplus', BYTEPLUS_MODELS],
+    ['claude', CLAUDE_MODELS],
+    ['deepseek', DEEPSEEK_MODELS],
+    ['gemini', GEMINI_MODELS],
+    ['groq', GROQ_MODELS],
+    ['hoonify', HOONIFY_MODELS],
+    ['meta', META_MODELS],
+    ['minimax', MINIMAX_MODELS],
+    ['mistral', MISTRAL_MODELS],
+    ['moonshotai', MOONSHOT_MODELS],
+    ['openai-completion', OPEN_AI_MODELS],
+    ['openai-responses', OPEN_AI_MODELS],
+    ['xai', XAI_MODELS],
+    ['zai', ZAI_MODELS],
+];
+const speeds: ServiceSpeed[] = ['standard', 'fast', 'ultrafast'];
+
+describe('service speed seeded fuzzing', () => {
+    it('preserves catalog, request, normalization, and billing invariants across model changes', () => {
+        let seed = 0x51eed;
+        const pick = <T>(values: T[]): T => {
+            seed = (Math.imul(seed, 1664525) + 1013904223) >>> 0;
+            return values[seed % values.length]!;
+        };
+        const seenProviders = new Set<string>();
+        for (let index = 0; index < 10_000; index++) {
+            const [provider, catalog] = pick(catalogs);
+            seenProviders.add(provider);
+            const base = { ...structuredClone(pick(catalog)), provider };
+            const before = structuredClone(base);
+            Object.freeze(base.costs);
+            Object.freeze(base);
+            const args = Object.freeze({
+                model: base.id,
+                messages: [{ role: 'user', content: `Case ${index}` }],
+                serviceSpeed: pick([...speeds, undefined]),
+                normalize: pick([true, false, undefined]),
+                temperature: pick([0, 0.5, 1]),
+                service_tier: pick(['flex' as const, 'ultrafast' as const, undefined]),
+                speed: pick(['standard' as const, 'fast' as const, undefined]),
+            });
+            const selected = selectServiceSpeed(base, args, (id) => {
+                const variant = catalog.find((entry) => entry.id === id);
+                return variant && { ...variant, provider };
+            });
+            expect(base).toEqual(before);
+            expect(selected.args.messages).toBe(args.messages);
+            expect(selected.args.temperature).toBe(args.temperature);
+            expect(selected.model.provider).toBe(provider);
+            expect(selected.model.release_date).toBe(base.release_date);
+            expect(
+                shouldPresentAsOpenAI(selected.args, selected.model.release_date),
+            ).toBe(shouldPresentAsOpenAI(args, base.release_date));
+            if (args.serviceSpeed === undefined) {
+                expect(selected.args).toBe(args);
+                expect(selected.model).toBe(base);
+                continue;
+            }
+            expect(speeds.indexOf(selected.speed)).toBeLessThanOrEqual(
+                speeds.indexOf(args.serviceSpeed),
+            );
+            expect(selected.args.serviceSpeed).toBe(selected.speed);
+            if (args.serviceSpeed === 'standard') {
+                expect(selected.args.speed).not.toBe('fast');
+                expect(selected.args.service_tier).not.toBe('ultrafast');
+            }
+            for (const cost of Object.values(selected.model.costs)) {
+                expect(Number.isFinite(cost)).toBe(true);
+                expect(cost).toBeGreaterThanOrEqual(0);
+            }
+            if (selected.model.serviceSpeedPricing) {
+                const settled = serviceSpeedBillingModel(selected.model, 'standard');
+                expect(settled.costs).toEqual(base.costs);
+                expect(settled.pricingOverrides).toEqual(base.pricingOverrides);
+            }
+            let speed = selected.speed;
+            for (let attempts = 0; speed !== 'standard'; attempts++) {
+                expect(attempts).toBeLessThan(2);
+                speed = lowerServiceSpeed(speed);
+            }
+        }
+        expect([...seenProviders].sort()).toEqual(catalogs.map(([provider]) => provider).sort());
+    });
+
+    it('handles malformed upstream tier and admission-error metadata without coercion or retries', () => {
+        const values = [null, false, 0, 429, '', 'unrelated', [], {},
+            ['service_tier capacity unavailable'],
+            { toString: null }, { toString: 'priority capacity unavailable' }];
+        for (const value of values) {
+            expect(isServiceSpeedUnavailable(value)).toBe(false);
+            for (const status of [undefined, 400, 401, 403, 404, 429, 500, 503]) {
+                for (const variant of [false, true]) {
+                    expect(isServiceSpeedUnavailable({ status, message: value }, variant)).toBe(false);
+                    expect(isServiceSpeedUnavailable({ status, error: { message: value } }, variant)).toBe(false);
+                }
+            }
+            expect(servedServiceSpeed({ usage: value })).toBe('standard');
+            expect(servedServiceSpeed({ service_tier: value })).toBe('standard');
+            expect(servedServiceSpeed({ usage: { speed: value, service_tier: value } })).toBe('standard');
+        }
+    });
+});

src/backend/drivers/ai-chat/utils/serviceSpeed.integration.test.ts

@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { describe, expect, it } from 'vitest';
+import {
+    makeMeteringStub,
+    optionalEnv,
+    withTestActor,
+} from '../../integrationTestUtil.js';
+import type {
+    IChatMessageResult,
+    IChatProvider,
+    ICompleteArguments,
+} from '../types.js';
+import { OpenAiResponsesChatProvider } from '../providers/openai/OpenAiChatResponsesProvider.js';
+import { GeminiChatProvider } from '../providers/gemini/GeminiChatProvider.js';
+import { MiniMaxProvider } from '../providers/minimax/MiniMaxProvider.js';
+import { MoonshotProvider } from '../providers/moonshot/MoonshotProvider.js';
+import { MistralAIProvider } from '../providers/mistral/MistralAiProvider.js';
+import { selectServiceSpeed } from './serviceSpeed.js';
+
+type Case = {
+    name: string;
+    env: string;
+    provider: string;
+    model: string;
+    build: (key: string) => IChatProvider;
+};
+const cases: Case[] = [
+    {
+        name: 'OpenAI Ultrafast',
+        env: 'PUTER_TEST_AI_OPENAI_API_KEY',
+        provider: 'openai-responses',
+        model: 'gpt-6.1-sol',
+        build: (key) =>
+            new OpenAiResponsesChatProvider(
+                { apiKey: key },
+                makeMeteringStub(),
+            ),
+    },
+    {
+        name: 'Gemini Priority',
+        env: 'PUTER_TEST_AI_GEMINI_API_KEY',
+        provider: 'gemini',
+        model: 'gemini-3.8-flash',
+        build: (key) =>
+            new GeminiChatProvider({ apiKey: key }, makeMeteringStub()),
+    },
+    {
+        name: 'MiniMax Priority',
+        env: 'PUTER_TEST_AI_MINIMAX_API_KEY',
+        provider: 'minimax',
+        model: 'minimax-m3',
+        build: (key) =>
+            new MiniMaxProvider({ apiKey: key }, makeMeteringStub()),
+    },
+    {
+        name: 'Moonshot Highspeed',
+        env: 'PUTER_TEST_AI_MOONSHOT_API_KEY',
+        provider: 'moonshotai',
+        model: 'kimi-k3.1-pro',
+        build: (key) =>
+            new MoonshotProvider({ apiKey: key }, makeMeteringStub()),
+    },
+    {
+        name: 'Mistral served tier',
+        env: 'PUTER_TEST_AI_MISTRAL_API_KEY',
+        provider: 'mistral',
+        model: 'mistral-medium-latest',
+        build: (key) =>
+            new MistralAIProvider({ apiKey: key }, makeMeteringStub()),
+    },
+];
+
+for (const testCase of cases) {
+    describe.skipIf(!optionalEnv(testCase.env))(
+        `serviceSpeed ${testCase.name} (integration)`,
+        () => {
+            it(
+                'completes with a selected speed and normalized text',
+                { timeout: 90_000 },
+                async () => {
+                    const provider = testCase.build(optionalEnv(testCase.env)!);
+                    const catalog = (await provider.models()).map((model) => ({
+                        ...model,
+                        provider: testCase.provider,
+                    }));
+                    const base = catalog.find(
+                        (model) =>
+                            model.id === testCase.model ||
+                            model.aliases?.includes(testCase.model),
+                    )!;
+                    expect(base).toBeDefined();
+                    const args: ICompleteArguments = {
+                        model: base.id,
+                        messages: [
+                            { role: 'user', content: 'Reply with exactly OK.' },
+                        ],
+                        serviceSpeed: 'ultrafast',
+                        max_tokens: 256,
+                        reasoning_effort: 'low',
+                        normalize: true,
+                    };
+                    const selection = selectServiceSpeed(base, args, (id) =>
+                        catalog.find((model) => model.id === id),
+                    );
+                    expect(selection.speed).toBe(
+                        testCase.provider === 'openai-responses'
+                            ? 'ultrafast'
+                            : 'fast',
+                    );
+                    const result = (await withTestActor(() =>
+                        provider.complete(
+                            { ...selection.args, model: selection.model.id },
+                            selection.model,
+                        ),
+                    )) as IChatMessageResult;
+                    expect(typeof result.message.content).toBe('string');
+                    expect(result.message.content.length).toBeGreaterThan(0);
+                    if (
+                        ['openai-responses', 'gemini', 'minimax'].includes(
+                            testCase.provider,
+                        )
+                    )
+                        expect(result.usageDetails?.serviceSpeed).toBe(
+                            selection.speed,
+                        );
+                },
+            );
+        },
+    );
+}

src/backend/drivers/ai-chat/utils/serviceSpeed.test.ts

@@ -0,0 +1,368 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { describe, expect, it } from 'vitest';
+import { Writable } from 'node:stream';
+import { AIChatStream } from './Streaming.js';
+import {
+    handle_completion_output,
+    handle_completion_output_responses_api,
+} from './OpenAIUtil.js';
+import type { IChatModel, ServiceSpeed } from '../types.js';
+import {
+    selectServiceSpeed,
+    servedServiceSpeed,
+    serviceSpeedBillingModel,
+    isServiceSpeedUnavailable,
+} from './serviceSpeed.js';
+import { meterChatUsage } from './meterChatUsage.js';
+import { OPEN_AI_MODELS } from '../providers/openai/models.js';
+import { XAI_MODELS } from '../providers/xai/models.js';
+import { GEMINI_MODELS } from '../providers/gemini/models.js';
+import { CLAUDE_MODELS } from '../providers/claude/models.js';
+
+const model = (provider: string, id: string): IChatModel => ({
+    provider,
+    id,
+    serviceSpeedRates: [...OPEN_AI_MODELS, ...XAI_MODELS, ...GEMINI_MODELS, ...CLAUDE_MODELS]
+        .find((entry) => entry.id === id)?.serviceSpeedRates,
+    costs_currency: 'usd-cents',
+    input_cost_key: 'prompt_tokens',
+    output_cost_key: 'completion_tokens',
+    max_tokens: 1000,
+    costs: {
+        tokens: 1_000_000,
+        prompt_tokens: 200,
+        completion_tokens: 1000,
+        cached_tokens: 10,
+        web_search_requests: 1_000_000,
+    },
+});
+const request = (serviceSpeed?: ServiceSpeed) => ({
+    model: 'test',
+    messages: [{ role: 'user', content: 'Hello' }],
+    serviceSpeed,
+});
+const noVariant = () => undefined;
+
+describe('service speed selection', () => {
+    it.each([2, { prompt_tokens: 400, completion_tokens: 2000 }])(
+        'uses catalog rates independently of provider and model names: %j',
+        (rates) => {
+            const entry = {
+                ...model('catalog-provider', 'renamed-model'),
+                serviceSpeedRates: { fast: rates },
+            };
+            const selected = selectServiceSpeed(entry, request('ultrafast'), noVariant);
+            expect(selected.speed).toBe('fast');
+            expect(selected.model.costs.prompt_tokens).toBe(400);
+            expect(selected.model.costs.completion_tokens).toBe(2000);
+            expect(entry.costs.prompt_tokens).toBe(200);
+        },
+    );
+    it('preserves an omitted option and native parameters', () => {
+        const entry = model('openai-responses', 'gpt-6.1-sol');
+        const args = { ...request(), service_tier: 'flex' as const };
+        const selected = selectServiceSpeed(entry, args, noVariant);
+        expect(selected.model).toBe(entry);
+        expect(selected.args).toBe(args);
+    });
+    it.each([
+        'deepseek',
+        'zai',
+        'groq',
+        'byteplus',
+        'together-ai',
+        'meta',
+        'ollama',
+        'hoonify',
+        'neuralwatt',
+        'fake-chat',
+    ])('uses standard when %s has no verified faster offering', (provider) => {
+        const selected = selectServiceSpeed(
+            model(provider, 'some-model'),
+            request('ultrafast'),
+            noVariant,
+        );
+        expect(selected.speed).toBe('standard');
+        expect(selected.args.service_tier).toBeUndefined();
+    });
+    it.each(['standard', 'fast', 'ultrafast'] as const)(
+        'selects %s without changing the model or catalog prices',
+        (speed) => {
+            const entry = model('openai-responses', 'gpt-6.1-sol');
+            const selected = selectServiceSpeed(
+                entry,
+                request(speed),
+                noVariant,
+            );
+            expect(selected.speed).toBe(speed);
+            expect(selected.model.id).toBe(entry.id);
+            expect(selected.model.costs.prompt_tokens).toBe(
+                200 * { standard: 1, fast: 2, ultrafast: 6 }[speed],
+            );
+            expect(selected.model.costs.web_search_requests).toBe(1_000_000);
+            expect(entry.costs.prompt_tokens).toBe(200);
+        },
+    );
+    it('downgrades ultrafast to fast on a model without ultrafast', () => {
+        const selected = selectServiceSpeed(
+            model('xai', 'grok-4.7'),
+            request('ultrafast'),
+            noVariant,
+        );
+        expect(selected.speed).toBe('fast');
+        expect(selected.args.service_tier).toBe('priority');
+    });
+    it('keeps a compatibility-only Gemini deployment at standard speed', () => {
+        const entry = {
+            ...model('gemini', 'gemini-3.8-flash'),
+            serviceSpeeds: ['standard'] as ServiceSpeed[],
+        };
+        expect(
+            selectServiceSpeed(entry, request('ultrafast'), noVariant).speed,
+        ).toBe('standard');
+    });
+    it('uses Claude speed independently of its service tier', () => {
+        const entry = model('claude', 'claude-opus-5-5');
+        expect(
+            selectServiceSpeed(entry, request('ultrafast'), noVariant).args
+                .speed,
+        ).toBe('fast');
+        expect(
+            selectServiceSpeed(entry, request('ultrafast'), noVariant).args
+                .service_tier,
+        ).toBeUndefined();
+        expect(
+            servedServiceSpeed({
+                usage: { speed: 'fast', service_tier: 'standard' },
+            }),
+        ).toBe('fast');
+    });
+    it.each([
+        ['minimax', 'minimax-m2.7', 'minimax-m2.7-highspeed'],
+        ['moonshotai', 'kimi-k3.1-pro', 'kimi-k3.1-pro-highspeed'],
+        ['alibaba', 'glm-5.3', 'glm-5.3-prime'],
+        ['alibaba', 'glm-5.2', 'glm-5.2-fast-preview'],
+        ['infron', 'infron:vendor/model', 'infron:vendor/model:priority'],
+    ])(
+        'selects an equivalent %s variant and preserves normalization policy',
+        (provider, id, variantId) => {
+            const base = {
+                ...model(provider, id),
+                serviceSpeedVariants: { fast: variantId },
+                release_date: '2026-08-01',
+            };
+            const variant = {
+                ...model(provider, variantId),
+                release_date: '2026-10-01',
+            };
+            const selected = selectServiceSpeed(
+                base,
+                request('ultrafast'),
+                (candidate) => (candidate === variantId ? variant : undefined),
+            );
+            expect(selected.model.id).toBe(variantId);
+            expect(selected.model.release_date).toBe(base.release_date);
+            expect(selected.speed).toBe('fast');
+            expect(
+                selectServiceSpeed(base, request('fast'), noVariant).speed,
+            ).toBe('standard');
+        },
+    );
+    it('keeps caller media on Gemini compatibility when native speed cannot carry it', () => {
+        const args = {
+            ...request('fast'),
+            messages: [
+                {
+                    role: 'user',
+                    content: [
+                        {
+                            type: 'video_url',
+                            video_url: { url: 'data:video/mp4;base64,AA==' },
+                        },
+                    ],
+                },
+            ],
+        };
+        expect(
+            selectServiceSpeed(
+                model('gemini', 'gemini-3.8-flash'),
+                args,
+                noVariant,
+            ).speed,
+        ).toBe('standard');
+    });
+});
+
+describe('served speed billing', () => {
+    it.each(['standard', 'fast', 'ultrafast'] as const)(
+        'settles an ultrafast hold at the served %s rate',
+        (speed) => {
+            const selected = selectServiceSpeed(
+                model('openai-responses', 'gpt-6.1-sol'),
+                request('ultrafast'),
+                noVariant,
+            ).model;
+            const recorded: Array<Record<string, number> | undefined> = [];
+            const meter = {
+                utilRecordUsageObject: (
+                    _usage: Record<string, number>,
+                    _actor: unknown,
+                    _key: string,
+                    costs?: Record<string, number>,
+                ) => {
+                    recorded.push(costs);
+                },
+            };
+            const result = meterChatUsage(
+                meter as never,
+                undefined,
+                'openai:gpt-6.1-sol',
+                selected,
+                { prompt_tokens: 10, completion_tokens: 5, cached_tokens: 20 },
+                { serviceSpeed: speed },
+            );
+            expect(result.costs.prompt_tokens).toBe(
+                2000 * { standard: 1, fast: 2, ultrafast: 6 }[speed],
+            );
+            expect(result.costs.cached_tokens).toBe(
+                200 * { standard: 1, fast: 2, ultrafast: 6 }[speed],
+            );
+            expect(recorded).toEqual([result.costs]);
+        },
+    );
+    it('restores standard scheduled and long-context rates after a downgrade', () => {
+        const entry = model('openai-responses', 'gpt-6.1-sol');
+        entry.pricingOverrides = [
+            {
+                minPromptTokens: 100,
+                costs: { prompt_tokens: 400, completion_tokens: 1500 },
+            },
+        ];
+        const selected = selectServiceSpeed(
+            entry,
+            request('ultrafast'),
+            noVariant,
+        ).model;
+        expect(
+            serviceSpeedBillingModel(selected, 'standard').pricingOverrides,
+        ).toEqual(entry.pricingOverrides);
+        expect(
+            serviceSpeedBillingModel(selected, 'fast').pricingOverrides?.[0]
+                .costs.prompt_tokens,
+        ).toBe(800);
+    });
+    it.each([
+        [{ service_tier: 'priority' }, 'fast'],
+        [{ usage: { serviceTier: 'priority' } }, 'fast'],
+        [{ usage: { service_tier: 'standard' } }, 'standard'],
+        [{ service_tier: 'ultrafast' }, 'ultrafast'],
+        [{}, 'standard'],
+    ])('reads actual speed from %j', (source, speed) => {
+        expect(servedServiceSpeed(source)).toBe(speed);
+    });
+});
+
+describe('speed admission failures', () => {
+    it.each([
+        [{ status: 429, message: 'Fast mode rate limit exceeded' }, true],
+        [{ status: 403, message: 'Ultrafast access unavailable' }, true],
+        [{ status: 400, message: 'service_tier is not supported' }, true],
+        [{ status: 401, message: 'Invalid API key' }, false],
+        [{ status: 429, message: 'Rate limit exceeded' }, false],
+        [{ status: 400, message: 'Invalid messages' }, false],
+    ])('classifies %j without swallowing unrelated errors', (error, retry) => {
+        expect(isServiceSpeedUnavailable(error)).toBe(retry);
+    });
+    it('downgrades a missing speed variant without retrying an invalid base model', () => {
+        const error = { status: 404, message: 'Model not found' };
+        expect(isServiceSpeedUnavailable(error, true)).toBe(true);
+        expect(isServiceSpeedUnavailable(error)).toBe(false);
+    });
+});
+
+describe('streamed service tier metadata', () => {
+    it('retains a tier from an earlier Chat Completions chunk until usage arrives', async () => {
+        let servedTier: string | undefined;
+        const result = await handle_completion_output({
+            stream: true,
+            completion: (async function* () {
+                yield {
+                    service_tier: 'priority',
+                    choices: [{ index: 0, delta: { content: 'OK' } }],
+                };
+                yield {
+                    choices: [{ index: 0, delta: {}, finish_reason: 'stop' }],
+                };
+                yield {
+                    choices: [],
+                    usage: { prompt_tokens: 10, completion_tokens: 1 },
+                };
+            })(),
+            usage_calculator: (source) => {
+                servedTier = source.service_tier;
+                return source.usage;
+            },
+        });
+        const chatStream = new AIChatStream({
+            stream: new Writable({
+                write(_chunk, _encoding, callback) {
+                    callback();
+                },
+            }),
+        });
+        await result.init_chat_stream!({ chatStream });
+        expect(servedTier).toBe('priority');
+    });
+
+    it('uses the final Responses tier when the provider downgrades a stream', async () => {
+        let servedTier: string | undefined;
+        const result = await handle_completion_output_responses_api({
+            stream: true,
+            completion: (async function* () {
+                yield {
+                    type: 'response.created',
+                    response: { service_tier: 'ultrafast' },
+                };
+                yield { type: 'response.output_text.delta', delta: 'OK' };
+                yield {
+                    type: 'response.completed',
+                    response: {
+                        service_tier: 'default',
+                        usage: { input_tokens: 10, output_tokens: 1 },
+                    },
+                };
+            })(),
+            usage_calculator: (source) => {
+                servedTier = source.service_tier;
+                return source.usage;
+            },
+        });
+        const chatStream = new AIChatStream({
+            stream: new Writable({
+                write(_chunk, _encoding, callback) {
+                    callback();
+                },
+            }),
+        });
+        await result.init_chat_stream!({ chatStream });
+        expect(servedTier).toBe('default');
+    });
+});

src/backend/drivers/ai-chat/utils/serviceSpeed.ts

@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { requiredInputModalities } from './mediaParts.js';
+import type {
+    IChatModel,
+    ICompleteArguments,
+    ModelCost,
+    ServiceSpeed,
+} from '../types.js';
+
+export const lowerServiceSpeed = (speed: ServiceSpeed): ServiceSpeed =>
+    speed === 'ultrafast' ? 'fast' : 'standard';
+
+const tokenRates = (costs: ModelCost, multiplier: number): ModelCost =>
+    Object.fromEntries(
+        Object.entries(costs).map(([key, value]) => [
+            key,
+            key !== 'tokens' &&
+            /token|^prompt$|^completion$|^input_cache_/.test(key)
+                ? value * multiplier
+                : value,
+        ]),
+    );
+
+export const serviceSpeedCosts = (
+    model: IChatModel,
+    speed: 'fast' | 'ultrafast',
+): ModelCost | undefined => {
+    if (model.serviceSpeeds && !model.serviceSpeeds.includes(speed))
+        return undefined;
+    const rates = model.serviceSpeedRates?.[speed];
+    return typeof rates === 'number'
+        ? tokenRates(model.costs, rates)
+        : rates
+          ? { ...model.costs, ...rates }
+          : undefined;
+};
+
+export interface ServiceSpeedSelection {
+    model: IChatModel;
+    args: ICompleteArguments;
+    speed: ServiceSpeed;
+}
+
+/** Select only an equivalent model from the same provider's loaded catalog. */
+export const selectServiceSpeed = (
+    model: IChatModel,
+    args: ICompleteArguments,
+    findVariant: (id: string) => IChatModel | undefined,
+    offers: Partial<Record<'fast' | 'ultrafast', IChatModel>> = {},
+): ServiceSpeedSelection => {
+    if (args.serviceSpeed === undefined)
+        return { model, args, speed: 'standard' };
+    const provider = model.provider;
+    const fast =
+        offers.fast?.costs ??
+        (provider === 'gemini' &&
+        (requiredInputModalities(args.messages).some(
+            (modality) => !['text', 'image'].includes(modality),
+        ) ||
+            args.messages.some(
+                (message) =>
+                    Array.isArray(message.content) &&
+                    message.content.some(
+                        (part: Record<string, unknown>) =>
+                            part &&
+                            [
+                                'input_audio',
+                                'audio_url',
+                                'document',
+                                'file',
+                                'input_file',
+                            ].includes(String(part.type)),
+                    ),
+            ))
+            ? undefined
+            : serviceSpeedCosts(model, 'fast'));
+    const ultra =
+        offers.ultrafast?.costs ?? serviceSpeedCosts(model, 'ultrafast');
+    let speed = args.serviceSpeed;
+    const variantId = model.serviceSpeedVariants?.fast;
+    const variant =
+        offers.fast && offers.fast.id !== model.id
+            ? offers.fast
+            : variantId
+              ? findVariant(variantId)
+              : undefined;
+    while (speed !== 'standard') {
+        if (speed === 'ultrafast' && ultra) break;
+        if (speed === 'fast' && (fast || variant)) break;
+        speed = lowerServiceSpeed(speed);
+    }
+    const request: ICompleteArguments = {
+        ...args,
+        serviceSpeed: speed,
+        speed: undefined,
+        service_tier: undefined,
+    };
+    if (speed === 'fast' && variant) {
+        return {
+            model: { ...variant, release_date: model.release_date },
+            args: request,
+            speed,
+        };
+    }
+    if (provider === 'gemini' && fast)
+        request.service_tier = speed === 'fast' ? 'priority' : 'standard';
+    else if (provider === 'claude')
+        request.speed = speed === 'fast' ? 'fast' : 'standard';
+    else if (provider === 'mistral')
+        request.service_tier = speed === 'fast' ? 'auto' : 'default';
+    else if (
+        provider === 'minimax' &&
+        model.serviceSpeedRates?.fast !== undefined
+    )
+        request.service_tier = speed === 'fast' ? 'priority' : 'standard';
+    else if (fast || ultra)
+        request.service_tier =
+            speed === 'ultrafast'
+                ? 'ultrafast'
+                : speed === 'fast'
+                  ? 'priority'
+                  : 'default';
+    if (
+        speed === 'standard' &&
+        [
+            'openai-completion',
+            'openai-responses',
+            'azure-openai',
+            'azure-openai-responses',
+            'openrouter',
+        ].includes(provider ?? '')
+    )
+        request.service_tier = 'default';
+    const selectedCosts =
+        speed === 'ultrafast' ? ultra : speed === 'fast' ? fast : undefined;
+    return {
+        args: request,
+        speed,
+        model: selectedCosts
+            ? {
+                  ...model,
+                  costs: selectedCosts,
+                  pricingOverrides: model.pricingOverrides?.map((override) => ({
+                      ...override,
+                      costs: Object.fromEntries(
+                          Object.entries(override.costs).map(([key, value]) => [
+                              key,
+                              model.costs[key] > 0
+                                  ? (value *
+                                        (selectedCosts[key] ??
+                                            model.costs[key])) /
+                                    model.costs[key]
+                                  : value,
+                          ]),
+                      ),
+                  })),
+                  serviceSpeedPricing: {
+                      speed,
+                      standardCosts: model.costs,
+                      standardOverrides: model.pricingOverrides,
+                      fastCosts: fast,
+                      ultrafastCosts: ultra,
+                  },
+              }
+            : model,
+    };
+};
+
+/** The response is authoritative; an absent tier never earns a premium. */
+export const servedServiceSpeed = (
+    source: Record<string, unknown>,
+): ServiceSpeed => {
+    const usage = source.usage as Record<string, unknown> | undefined;
+    const tier =
+        usage?.speed ??
+        usage?.serviceTier ??
+        usage?.service_tier ??
+        source.service_tier;
+    return tier === 'ultrafast'
+        ? 'ultrafast'
+        : tier === 'fast' || tier === 'priority'
+          ? 'fast'
+          : 'standard';
+};
+
+export const serviceSpeedBillingModel = (
+    model: IChatModel,
+    speed: ServiceSpeed,
+): IChatModel => {
+    const pricing = model.serviceSpeedPricing;
+    if (!pricing || pricing.speed === speed) return model;
+    const costs =
+        speed === 'fast'
+            ? (pricing.fastCosts ?? pricing.standardCosts)
+            : pricing.standardCosts;
+    return {
+        ...model,
+        costs,
+        pricingOverrides: pricing.standardOverrides?.map((override) => ({
+            ...override,
+            costs: Object.fromEntries(
+                Object.entries(override.costs).map(([key, value]) => [
+                    key,
+                    pricing.standardCosts[key] > 0
+                        ? (value * (costs[key] ?? pricing.standardCosts[key])) /
+                          pricing.standardCosts[key]
+                        : value,
+                ]),
+            ),
+        })),
+    };
+};
+
+/** Retry only failures that explicitly concern admission to the faster tier. */
+export const isServiceSpeedUnavailable = (
+    error: unknown,
+    variant = false,
+): boolean => {
+    const e = error as {
+        status?: number;
+        statusCode?: number;
+        message?: unknown;
+        error?: { message?: unknown };
+    };
+    const status = e?.status ?? e?.statusCode;
+    const message = e?.error?.message ?? e?.message ?? '';
+    if (typeof message !== 'string') return false;
+    if (
+        variant &&
+        [400, 404].includes(status ?? 0) &&
+        /model.*(?:not found|not exist|unavailable)/i.test(message)
+    )
+        return true;
+    return (
+        [400, 403, 429, 503].includes(status ?? 0) &&
+        /fast mode|ultrafast|service[_ ]?tier|priority (?:tier|processing|capacity)|speed parameter/i.test(
+            message,
+        ) &&
+        /unavailable|unsupported|not support|rate.limit|quota|capacity|not enabled|not allowed|access|exceed|invalid value/i.test(
+            message,
+        )
+    );
+};

src/backend/server.test.ts

@@ -414,6 +414,7 @@ describe('PuterServer host header validation', () => {
         'show-save-file-picker',
         'show-directory-picker',
         'upgrade',
+        'request-email-confirmation',
     ])('lets a deployment subdomain frame the %s popup and names it to the GUI', async (action) => {
         const parent = `http://spreadsheet.puter.localhost:${port}`;
         const guiParams = (body: string) =>
@@ -446,7 +447,7 @@ describe('PuterServer host header validation', () => {
         expect(redirected.headers['x-frame-options']).toBe('SAMEORIGIN');
     });
 
-    it.each(['/embed/SIGN-IN', '/embed/Show-Open-File-Picker', '/embed/sign-in/', '/embed/Upgrade', '/embed/upgrade/'])(
+    it.each(['/embed/SIGN-IN', '/embed/Show-Open-File-Picker', '/embed/sign-in/', '/embed/Upgrade', '/embed/upgrade/', '/embed/Request-Email-Confirmation'])(
         'lets a first-party page frame only the exact spelling of %s',
         async (spelling) => {
             const res = await request(spelling, {

src/docs/src/AI/chat.md

@@ -30,6 +30,7 @@ An object containing the following properties:
 | Option | Type | Description |
 |--------|------|-------------|
 | `model` | `String` | The model you want to use for the completion. If not specified, defaults to `gpt-5.4-nano`. More than 500 models are available from providers including OpenAI, Anthropic, Google, Alibaba Cloud, xAI, Mistral, OpenRouter, Infron, and others. For a full list, see the [AI models list](https://developer.puter.com/ai/models/) page. |
+| `serviceSpeed` | `String` | Preferred service speed, `"standard"`, `"fast"`, or `"ultrafast"`. Unavailable speeds fall back from ultrafast to fast, then standard. Omitting it preserves the model's default service. Faster service may cost more. See [Service speed](#service-speed) and [Model-specific features](#model-specific-features). |
 | `stream` | `Boolean` | A boolean indicating whether you want to stream the completion. Defaults to `false`. |
 | `max_tokens` | `Number` | The maximum number of tokens to generate in the completion. By default, the specific model's maximum is used. |
 | `temperature` | `Number` | A number between 0 and 2 indicating the randomness of the completion. Lower values make the output more focused and deterministic, while higher values make it more random. By default, the model's own temperature is used. See [Model-specific features](#model-specific-features). |
@@ -138,6 +139,8 @@ by a newline. Use the async iterator to receive every chunk as an object.
 
 In case of an error, the `Promise` will reject with an error message.
 
+An unrecognized `serviceSpeed` value rejects with `invalid_service_speed`.
+
 For streaming responses, an error from the AI provider is returned as a chunk
 with `type: "error"` and a `message` describing the failure. This also happens
 if the provider stops sending the response before it is complete. Check for
@@ -370,10 +373,20 @@ const response = await puter.ai.chat('Hello', {
 
 With `provider` set as well, the request is answered by that provider or fails. If that provider does not serve the model, the request fails with a `400` instead of going to another provider. The error is the same one you would get if every provider had failed, for example `400 upstream_provider_unavailable` or `429 upstream_rate_limited`.
 
+## Service speed
+
+The `serviceSpeed` option selects service capacity independently of reasoning effort. If the requested speed is unavailable for the selected model, the request uses the next supported speed in the order `ultrafast`, `fast`, `standard`.
+
+A faster tier that rejects a request because its capacity or access is unavailable can retry at a lower speed on the same provider. The `fallback` option controls retries on other providers separately. Once streaming output starts, a failed stream ends with an error instead of restarting at another speed.
+
+The `usageDetails.serviceSpeed` field reports the served speed. Billing uses the tier or equivalent model that served the request. A provider downgrade is billed at the lower tier's rates. Response normalization follows the same rule as a request without this option, including when a faster equivalent model is selected.
+
 ## Model-specific features
 
 ### OpenAI models
 
+Fast service is available on models with a published Fast rate card. Ultrafast is available for GPT-6.1 Sol and GPT-6 Astra. Other models fall back to fast or standard. Cache and long-context rates apply to the served tier.
+
 #### `temperature`
 
 Some OpenAI reasoning models ignore `temperature` and `top_p`. GPT-5.6, GPT-6 Sol/Luna, and GPT-6.1 Terra accept them only with `reasoning_effort: 'none'`, and GPT-6 Astra, GPT-6.1 Sol, and GPT-5.3 Codex always ignore them.
@@ -418,6 +431,8 @@ The `usageDetails` object on every result carries the same counts under provider
 
 ### Anthropic models
 
+Fast service is available on Claude models with a Fast rate card. Ultrafast falls back to fast. When the account has no Fast quota, the request retries at standard speed. The upstream service tier and inference speed are separate fields.
+
 #### Prompt Caching
 
 Specific to Anthropic models, you can use the cache control feature, allowing you to optimize costs for repeated prompts.
@@ -442,6 +457,8 @@ You can find the implementation in our [prompt caching example](/playground/ai-c
 
 ### Gemini models
 
+Fast service uses Priority inference on supported text and image requests. Other media use standard service to preserve input handling.
+
 #### `temperature`
 
 `gemini-4-argon` ignores `temperature`. `gemini-3.1-flash-lite` and `gemini-3-flash-preview` use it.
@@ -543,6 +560,8 @@ for await (const part of resp) {
 
 ### Moonshot Kimi models
 
+Models with an equivalent Highspeed variant select that variant for fast service. Other models use standard service.
+
 #### `reasoning_effort`
 
 Kimi K3.1 Pro accepts `low`, `high` and `max`, uses `max` when you leave it unset, and fails with `400 bad_request` on any other value.
@@ -557,6 +576,30 @@ Moonshot's Kimi K3 and Kimi K3.1 Pro models cache prompt prefixes on their own a
 
 Muse Spark always reasons, so `none` is ignored for it.
 
+### xAI models
+
+Fast service requests Priority processing. Token charges, including cached input and reasoning, follow the served tier.
+
+### MiniMax models
+
+MiniMax M3 uses Priority admission for fast service. Earlier models with an equivalent Highspeed variant use that variant. Other models use standard service.
+
+### Mistral models
+
+Fast service requests Priority when the account and model are eligible. The provider can serve the request at standard speed.
+
+### Alibaba Cloud models
+
+Models with an equivalent Prime or Fast variant select that variant for fast service. Other models use standard service.
+
+### OpenRouter models
+
+Faster tiers come from the selected model's endpoint catalog. A tier can fall back upstream. Billing uses the endpoint that serves the request.
+
+### Infron models
+
+Models with a Priority offering select that offering for fast service. Other models use standard service.
+
 ## Examples
 
 ### Ask GPT-6 Luna a question
@@ -1092,3 +1135,23 @@ Policy 8 - Account Management: Each Enterprise and Ultimate customer is assigned
 </body>
 </html>
 ```
+
+### Select service speed
+
+For example, request the fastest supported service:
+
+```html;ai-chat-service-speed
+<html>
+<body>
+    <script src="https://js.puter.com/v2/"></script>
+    <script type="module">
+        const response = await puter.ai.chat('Explain closures in one paragraph.', {
+            model: 'gpt-6.1-sol',
+            serviceSpeed: 'ultrafast',
+        });
+        puter.print(response.message.content);
+        puter.print(response.usageDetails.serviceSpeed);
+    </script>
+</body>
+</html>
+```

src/docs/src/Objects/chatresponse.md

@@ -64,7 +64,7 @@ Extra detail on why generation stopped (e.g. a refusal classification). Provider
 
 #### `usageDetails` (Object)
 
-A provider-neutral usage breakdown, present alongside `usage` on every result. `inputTokens` excludes cache reads/writes; `outputTokens` includes reasoning tokens. Fields: `inputTokens`, `outputTokens`, `cacheReadTokens`, `cacheWrite5mTokens`, `cacheWrite30mTokens`, `cacheWrite1hTokens`, `cacheWrite12hTokens`, `reasoningTokens`, `webSearchRequests`, `webFetchRequests`, `speed` (`"fast"` or `"standard"`), `serviceTier`, and `iterations` (a per-pass breakdown when the upstream ran several passes, e.g. compaction or an advisor sub-call). Each `cacheWrite*Tokens` field counts the tokens written to the cache with that lifetime: Claude and Moonshot write 5 minute and 1 hour entries, OpenAI writes 30 minute and 12 hour entries.
+A provider-neutral usage breakdown, present alongside `usage` on every result. `inputTokens` excludes cache reads/writes; `outputTokens` includes reasoning tokens. Fields: `inputTokens`, `outputTokens`, `cacheReadTokens`, `cacheWrite5mTokens`, `cacheWrite30mTokens`, `cacheWrite1hTokens`, `cacheWrite12hTokens`, `reasoningTokens`, `webSearchRequests`, `webFetchRequests`, `speed` (`"fast"` or `"standard"`), `serviceTier`, `serviceSpeed` (`"standard"`, `"fast"`, or `"ultrafast"` when requested), and `iterations` (a per-pass breakdown when the upstream ran several passes, e.g. compaction or an advisor sub-call). Each `cacheWrite*Tokens` field counts the tokens written to the cache with that lifetime: Claude and Moonshot write 5 minute and 1 hour entries, OpenAI writes 30 minute and 12 hour entries.
 
 Prefer `usageDetails` over `usage` for anything beyond the raw billing totals. Claude's `usage.thinking_tokens` is informational: it's included in `output_tokens` and not billed separately — `usageDetails.reasoningTokens` carries the same count.
 

src/docs/src/Objects/chatresponsechunk.md

@@ -102,7 +102,7 @@ Extra detail on why generation stopped (e.g. a refusal classification). Provider
 
 #### `usageDetails` (Object)
 
-A provider-neutral usage breakdown, present on the final `usage` chunk. `inputTokens` excludes cache reads/writes; `outputTokens` includes reasoning tokens. Fields: `inputTokens`, `outputTokens`, `cacheReadTokens`, `cacheWrite5mTokens`, `cacheWrite30mTokens`, `cacheWrite1hTokens`, `cacheWrite12hTokens`, `reasoningTokens`, `webSearchRequests`, `webFetchRequests`, `speed` (`"fast"` or `"standard"`), `serviceTier`, and `iterations` (a per-pass breakdown when the upstream ran several passes, e.g. compaction or an advisor sub-call). Each `cacheWrite*Tokens` field counts the tokens written to the cache with that lifetime: Claude and Moonshot write 5 minute and 1 hour entries, OpenAI writes 30 minute and 12 hour entries.
+A provider-neutral usage breakdown, present on the final `usage` chunk. `inputTokens` excludes cache reads/writes; `outputTokens` includes reasoning tokens. Fields: `inputTokens`, `outputTokens`, `cacheReadTokens`, `cacheWrite5mTokens`, `cacheWrite30mTokens`, `cacheWrite1hTokens`, `cacheWrite12hTokens`, `reasoningTokens`, `webSearchRequests`, `webFetchRequests`, `speed` (`"fast"` or `"standard"`), `serviceTier`, `serviceSpeed` (`"standard"`, `"fast"`, or `"ultrafast"` when requested), and `iterations` (a per-pass breakdown when the upstream ran several passes, e.g. compaction or an advisor sub-call). Each `cacheWrite*Tokens` field counts the tokens written to the cache with that lifetime: Claude and Moonshot write 5 minute and 1 hour entries, OpenAI writes 30 minute and 12 hour entries.
 
 #### `message` (String)
 

src/docs/src/examples.js

@@ -49,6 +49,12 @@ const examples = [
                 slug: 'ai-chatgpt',
                 source: '/playground/examples/ai-chatgpt.html',
             },
+            {
+                title: 'Select Service Speed',
+                description: 'Request faster AI service and inspect the speed that served the response.',
+                slug: 'ai-chat-service-speed',
+                source: '/playground/examples/ai-chat-service-speed.html',
+            },
             {
                 title: 'Image Analysis',
                 description: 'Analyze images with AI using Puter.js GPT Vision API. Run and modify this code example instantly in your browser.',

src/docs/src/playground/examples/ai-chat-service-speed.html

@@ -0,0 +1,13 @@
+<html>
+<body>
+    <script src="https://js.puter.com/v2/"></script>
+    <script type="module">
+        const response = await puter.ai.chat('Explain closures in one paragraph.', {
+            model: 'gpt-6.1-sol',
+            serviceSpeed: 'ultrafast',
+        });
+        puter.print(response.message.content);
+        puter.print(response.usageDetails.serviceSpeed);
+    </script>
+</body>
+</html>

src/docs/src/rate-limits-and-quotas.md

@@ -226,6 +226,11 @@ Image and video inputs to [`txt2img()`](/AI/txt2img/) and [`txt2vid()`](/AI/txt2
 
 puter.js uploads a `Blob`, a `File` or a `data:` URI over 1 MiB to a temporary Puter file for the call. It counts against the user's storage until puter.js deletes it after the call.
 
+
+### Chat service speed catalogs
+
+OpenRouter speed endpoint catalogs are cached for 15 minutes, with at most 256 model entries per backend process. A catalog fetch times out after 10 seconds and accepts at most 2 MiB. Failed fetches are remembered for 30 seconds. If no usable speed offering is available, the request uses standard service.
+
 ### Remote chat image inlining
 
 For chat providers that require remote image URLs to be inlined (currently Moonshot):

src/gui/src/IPC.js

@@ -18,7 +18,9 @@
  */
 
 import download from './helpers/download.js';
+import ensureConfirmedEmail from './helpers/ensureConfirmedEmail.js';
 import item_icon from './helpers/itemIcon.js';
+import { atPath } from './helpers/pathElements.js';
 import socialLink from './helpers/socialLink.js';
 import update_mouse_position from './helpers/updateMousePosition.js';
 import path from './lib/path.js';
@@ -31,11 +33,9 @@ import UIWindow from './UI/UIWindow.js';
 import UIWindowAppFeedback from './UI/UIWindowAppFeedback.js';
 import UIWindowAttachCustomDomain from './UI/UIWindowAttachCustomDomain.js';
 import UIWindowColorPicker from './UI/UIWindowColorPicker.js';
-import UIWindowEmailConfirmationRequired from './UI/UIWindowEmailConfirmationRequired.js';
 import UIWindowFontPicker from './UI/UIWindowFontPicker.js';
 import UIPermissionDialog from './UI/UIPermissionDialog.js';
 import UIEnablePushDialog from './UI/UIEnablePushDialog.js';
-import UIWindowSaveAccount from './UI/UIWindowSaveAccount.js';
 import UIAuthSignup from './UI/Auth/UIAuthSignup.js';
 import UINotification from './UI/UINotification.js';
 
@@ -235,49 +235,12 @@ const ipc_listener = async (event, handled) => {
     // requestEmailConfirmation
     //--------------------------------------------------------
     else if ( event.data.msg === 'requestEmailConfirmation' ) {
-        // If the user has an email and it is confirmed, respond with success
-        if ( window.user.email && window.user.email_confirmed ) {
-            target_iframe.contentWindow.postMessage({
-                original_msg_id: msg_id,
-                msg: 'requestEmailConfirmationResponded',
-                response: true,
-            }, '*');
-        }
-
-        // If the user is a temporary user, show the save account window
-        if ( window.user.is_temp &&
-            !await UIWindowSaveAccount({
-                send_confirmation_code: true,
-                message: 'Please create an account to proceed.',
-                window_options: {
-                    backdrop: true,
-                    close_on_backdrop_click: false,
-                },
-            }) ) {
-            target_iframe.contentWindow.postMessage({
-                original_msg_id: msg_id,
-                msg: 'requestEmailConfirmationResponded',
-                response: false,
-            }, '*');
-            return;
-        }
-        else if ( !window.user.email_confirmed && !await UIWindowEmailConfirmationRequired() ) {
-            target_iframe.contentWindow.postMessage({
-                original_msg_id: msg_id,
-                msg: 'requestEmailConfirmationResponded',
-                response: false,
-            }, '*');
-            return;
-        }
-
-        const email_confirm_resp = await UIWindowEmailConfirmationRequired({
-            email: window.user.email,
-        });
-
+        // Above the app's window, which stays on top in the dashboard.
+        const confirmed = await ensureConfirmedEmail(i18n('save_account_to_proceed'), { stay_on_top: true });
         target_iframe.contentWindow.postMessage({
             original_msg_id: msg_id,
             msg: 'requestEmailConfirmationResponded',
-            response: email_confirm_resp,
+            response: confirmed,
         }, '*');
     }
     //--------------------------------------------------------
@@ -1740,7 +1703,7 @@ const ipc_listener = async (event, handled) => {
             $(`.item[data-uid="${res.uid}"]`).removeItems();
             // now add new items
             UIItem({
-                appendTo: $(`.item-container[data-path="${html_encode(path.dirname(target_path))}" i]`),
+                appendTo: atPath('.item-container', path.dirname(target_path)),
                 immutable: res.immutable || res.writable === false,
                 associated_app_name: res.associated_app?.name,
                 path: target_path,
@@ -1754,7 +1717,7 @@ const ipc_listener = async (event, handled) => {
                 suggested_apps: res.suggested_apps,
             });
             // sort each window
-            $(`.item-container[data-path="${html_encode(path.dirname(target_path))}" i]`).each(function () {
+            atPath('.item-container', path.dirname(target_path)).each(function () {
                 window.sort_items(this, $(this).attr('data-sort_by'), $(this).attr('data-sort_order'));
             });
             $(el_filedialog_window).close();

src/gui/src/IPC.requestEmailConfirmation.test.js

@@ -0,0 +1,146 @@
+// @vitest-environment jsdom
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import { beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
+import jQuery from './lib/jquery-3.6.1/jquery-3.6.1.min.js';
+
+globalThis.def = globalThis.def ?? ((cls) => cls);
+globalThis.use = globalThis.use ?? (() => ({}));
+globalThis.$ = globalThis.jQuery = jQuery;
+globalThis.i18n = (key) => key;
+
+const { stub, confirmEmail, saveAccount } = vi.hoisted(() => ({
+    stub: () => ({ default: () => {} }),
+    confirmEmail: vi.fn(),
+    saveAccount: vi.fn(),
+}));
+vi.mock('./helpers/download.js', stub);
+vi.mock('./helpers/itemIcon.js', stub);
+vi.mock('./helpers/socialLink.js', stub);
+vi.mock('./helpers/updateMousePosition.js', stub);
+vi.mock('./UI/UIAlert.js', stub);
+vi.mock('./UI/UIContextMenu.js', stub);
+vi.mock('./UI/UIItem.js', stub);
+vi.mock('./UI/UIPopover.js', stub);
+vi.mock('./UI/UIPrompt.js', stub);
+vi.mock('./UI/UIWindow.js', stub);
+vi.mock('./UI/UIWindowAppFeedback.js', stub);
+vi.mock('./UI/UIWindowColorPicker.js', stub);
+vi.mock('./UI/UIWindowEmailConfirmationRequired.js', () => ({ default: confirmEmail }));
+vi.mock('./UI/UIWindowFontPicker.js', stub);
+vi.mock('./UI/UIPermissionDialog.js', stub);
+vi.mock('./UI/UIEnablePushDialog.js', stub);
+vi.mock('./UI/UIWindowSaveAccount.js', () => ({ default: saveAccount }));
+vi.mock('./UI/Auth/UIAuthSignup.js', stub);
+vi.mock('./UI/UINotification.js', stub);
+vi.mock('./helpers/godmodeTokens.js', () => ({ renewGodmodeToken: vi.fn() }));
+vi.mock('./helpers/watchItems.js', () => ({ addItemWatcher: vi.fn() }));
+vi.mock('./helpers/verification_gates.js', () => ({
+    openVerificationGateWindow: vi.fn(),
+}));
+
+let iframe;
+let posted;
+
+beforeAll(async () => {
+    window.when_puter_happens = [];
+    window.appCallbackFunctions = {};
+    await import('./IPC.js');
+    globalThis.puter = { services: undefined, util: { rpc: { send: vi.fn() } } };
+    for (const fn of window.when_puter_happens) await fn();
+});
+
+beforeEach(() => {
+    confirmEmail.mockReset();
+    saveAccount.mockReset();
+    document.body.innerHTML = '';
+    const win = document.createElement('div');
+    win.setAttribute('data-app_uuid', 'app-1');
+    iframe = document.createElement('iframe');
+    iframe.setAttribute('data-app', 'notes');
+    win.append(iframe);
+    document.body.append(win);
+    posted = vi.spyOn(iframe.contentWindow, 'postMessage').mockImplementation(() => {});
+    window.app_instance_ids = new Set(['inst-1']);
+    window.iframe_for_app_instance = (id) => (id === 'inst-1' ? iframe : null);
+    window.window_for_app_instance = () => win;
+    window.is_auth = () => true;
+    window.ipc_handlers = {};
+    globalThis.services = { get: () => ({ get_by_uuid: () => ({ name: 'caller', uuid: 'inst-1' }) }) };
+});
+
+const request = () =>
+    window.dispatchEvent(
+        new MessageEvent('message', {
+            data: { appInstanceID: 'inst-1', env: 'app', msg: 'requestEmailConfirmation', uuid: 'cb-1' },
+            source: iframe.contentWindow,
+            origin: 'https://app.example',
+        }),
+    );
+
+const settle = () => new Promise((r) => setTimeout(r, 20));
+
+const replies = () => posted.mock.calls
+    .map(([data]) => data)
+    .filter((data) => data.msg === 'requestEmailConfirmationResponded');
+
+describe('requestEmailConfirmation', () => {
+    it('answers a confirmed email true once, without a dialog', async () => {
+        window.user = { email: '[email protected]', email_confirmed: true };
+        request();
+        await settle();
+        expect(replies()).toEqual([{ original_msg_id: 'cb-1', msg: 'requestEmailConfirmationResponded', response: true }]);
+        expect(confirmEmail).not.toHaveBeenCalled();
+        expect(saveAccount).not.toHaveBeenCalled();
+    });
+
+    it.each([true, false])('shows an unconfirmed email one dialog and answers its result, %s', async (answer) => {
+        window.user = { email: '[email protected]', email_confirmed: false };
+        confirmEmail.mockResolvedValueOnce(answer);
+        request();
+        await settle();
+        expect(confirmEmail).toHaveBeenCalledTimes(1);
+        // The app's window stays on top in the dashboard, so the dialog has to as well.
+        expect(confirmEmail).toHaveBeenCalledWith({ window_options: { stay_on_top: true } });
+        expect(replies()).toEqual([{ original_msg_id: 'cb-1', msg: 'requestEmailConfirmationResponded', response: answer }]);
+    });
+
+    it('answers false once when a temporary account isn\'t saved', async () => {
+        window.user = { is_temp: true };
+        saveAccount.mockResolvedValueOnce(false);
+        request();
+        await settle();
+        expect(saveAccount).toHaveBeenCalledTimes(1);
+        expect(saveAccount.mock.calls[0][0].window_options).toMatchObject({ stay_on_top: true });
+        expect(confirmEmail).not.toHaveBeenCalled();
+        expect(replies()).toEqual([{ original_msg_id: 'cb-1', msg: 'requestEmailConfirmationResponded', response: false }]);
+    });
+
+    it('asks a temporary account that confirmed while saving for nothing more', async () => {
+        window.user = { is_temp: true };
+        saveAccount.mockImplementationOnce(async () => {
+            window.user = { is_temp: false, email: '[email protected]', email_confirmed: true };
+            return true;
+        });
+        request();
+        await settle();
+        expect(confirmEmail).not.toHaveBeenCalled();
+        expect(replies()).toEqual([{ original_msg_id: 'cb-1', msg: 'requestEmailConfirmationResponded', response: true }]);
+    });
+});

src/gui/src/UI/Auth/UIAuthSignup.js

@@ -111,8 +111,8 @@ const runVerificationGates = async (user, show_email, reload_on_success, page) =
     let email_verified = true;
     const emailGate = async () => {
         if ( ! show_email ) return;
-        // Its ✕ would close it without an answer, leaving the caller
-        // waiting on a card that is already gone.
+        // No ✕: the signup card it replaced is already gone, so there's
+        // nothing to go back to.
         email_verified = await UIWindowEmailConfirmationRequired({
             show_close_button: false,
             stay_on_top: true,

src/gui/src/UI/UIDesktop.js

@@ -34,6 +34,7 @@ import UIWindowProgress from './UIWindowProgress.js';
 import UITaskbar from './UITaskbar.js';
 import new_context_menu_item from '../helpers/newContextMenuItem.js';
 import refresh_item_container from '../helpers/refreshItemContainer.js';
+import { atPath, retargetPaths, underPath } from '../helpers/pathElements.js';
 import changeLanguage from '../i18n/i18nChangeLanguage.js';
 import UIWindowTaskManager from './UIWindowTaskManager.js';
 import truncate_filename from '../helpers/truncateFilename.js';
@@ -416,12 +417,12 @@ async function UIDesktop (options) {
         }
 
         // hide all UIItems with matching uids
-        $(`.item[data-path='${item.path}']`).fadeOut(150, function () {
+        atPath('.item', item.path).fadeOut(150, function () {
             // close all windows with matching uids
             // $('.window-' + item.uid).close();
             // close all windows that belong to a descendant of this item
-            // todo this has to be case-insensitive but the `i` selector doesn't work on ^=
-            $(`.window[data-path^="${item.path}/"]`).close();
+            // todo this has to be case-insensitive
+            underPath('.window', item.path).close();
         });
     });
 
@@ -459,20 +460,7 @@ async function UIDesktop (options) {
         $(`.item[data-uid='${item.uid}']`).attr('data-path', new_path);
         $(`.window-${item.uid}`).attr('data-path', new_path);
 
-        // Update all elements that have matching paths
-        $(`[data-path="${html_encode(item.old_path)}" i]`).each(function () {
-            $(this).attr('data-path', new_path);
-            if ( $(this).hasClass('window-navbar-path-dirname') )
-            {
-                $(this).text(item.name);
-            }
-        });
-
-        // Update all elements whose paths start with old_path
-        $(`[data-path^="${`${html_encode(item.old_path) }/`}"]`).each(function () {
-            const new_el_path = $(this).attr('data-path').replace(`${item.old_path }/`, `${new_path }/`);
-            $(this).attr('data-path', new_el_path);
-        });
+        retargetPaths(item.old_path, new_path, item.name);
 
         // Update all exact-matching windows
         $(`.window-${item.uid}`).each(function () {
@@ -507,7 +495,7 @@ async function UIDesktop (options) {
         const metadata = parse_item_metadata(fsentry.metadata);
 
         // update all shortcut_to_path
-        $(`.item[data-shortcut_to_path="${html_encode(resp.old_path)}" i]`).attr('data-shortcut_to_path', html_encode(fsentry.path));
+        atPath('.item', resp.old_path, 'data-shortcut_to_path').attr('data-shortcut_to_path', fsentry.path);
 
         // remove all items with matching uids
         $(`.item[data-uid='${fsentry.uid}']`).fadeOut(150, function () {
@@ -524,16 +512,16 @@ async function UIDesktop (options) {
 
         // if trashing, close windows of trashed items and its descendants
         if ( dest_path === window.trash_path ) {
-            $(`.window[data-path="${html_encode(resp.old_path)}" i]`).close();
-            // todo this has to be case-insensitive but the `i` selector doesn't work on ^=
-            $(`.window[data-path^="${html_encode(resp.old_path)}/"]`).close();
+            atPath('.window', resp.old_path).close();
+            // todo this has to be case-insensitive
+            underPath('.window', resp.old_path).close();
         }
 
         // update all paths of its and its descendants' open windows
         else {
-            // todo this has to be case-insensitive but the `i` selector doesn't work on ^=
-            $(`.window[data-path^="${html_encode(resp.old_path)}/"], .window[data-path="${html_encode(resp.old_path)}" i]`).each(function () {
-                window.update_window_path(this, $(this).attr('data-path').replace(resp.old_path, fsentry.path));
+            // todo this has to be case-insensitive
+            underPath('.window', resp.old_path).add(atPath('.window', resp.old_path)).each(function () {
+                window.update_window_path(this, fsentry.path + $(this).attr('data-path').slice(resp.old_path.length));
             });
         }
 
@@ -560,7 +548,7 @@ async function UIDesktop (options) {
 
         // create new item on matching containers
         UIItem({
-            appendTo: $(`.item-container[data-path='${html_encode(dest_path)}' i]`),
+            appendTo: atPath('.item-container', dest_path),
             immutable: fsentry.immutable || fsentry.writable === false,
             uid: fsentry.uid,
             path: fsentry.path,
@@ -585,8 +573,8 @@ async function UIDesktop (options) {
             // if these new path have any open parents that need to be updated
 
             fsentry.parent_dirs_created.forEach(async dir => {
-                let item_container = $(`.item-container[data-path='${html_encode(path.dirname(dir.path))}' i]`);
-                if ( item_container.length > 0 && $(`.item[data-path="${html_encode(dir.path)}" i]`).length === 0 ) {
+                let item_container = atPath('.item-container', path.dirname(dir.path));
+                if ( item_container.length > 0 && atPath('.item', dir.path).length === 0 ) {
                     UIItem({
                         appendTo: item_container,
                         immutable: false,
@@ -606,7 +594,7 @@ async function UIDesktop (options) {
             });
         }
         //sort each container
-        $(`.item-container[data-path='${html_encode(dest_path)}' i]`).each(function () {
+        atPath('.item-container', dest_path).each(function () {
             window.sort_items(this, $(this).attr('data-sort_by'), $(this).attr('data-sort_order'));
         });
     });
@@ -693,20 +681,7 @@ async function UIDesktop (options) {
         $(`.item[data-uid='${item.uid}']`).attr('data-path', new_path);
         $(`.window-${item.uid}`).attr('data-path', new_path);
 
-        // Update all elements that have matching paths
-        $(`[data-path="${html_encode(item.old_path)}" i]`).each(function () {
-            $(this).attr('data-path', new_path);
-            if ( $(this).hasClass('window-navbar-path-dirname') )
-            {
-                $(this).text(item.name);
-            }
-        });
-
-        // Update all elements whose paths start with old_path
-        $(`[data-path^="${`${html_encode(item.old_path) }/`}"]`).each(function () {
-            const new_el_path = $(this).attr('data-path').replace(`${item.old_path }/`, `${new_path }/`);
-            $(this).attr('data-path', new_el_path);
-        });
+        retargetPaths(item.old_path, new_path, item.name);
 
         // Update all exact-matching windows
         $(`.window-${item.uid}`).each(function () {

src/gui/src/UI/UIItem.js

@@ -18,9 +18,8 @@
  */
 
 import UIWindowItemProperties from './UIWindowItemProperties.js';
-import UIWindowSaveAccount from './UIWindowSaveAccount.js';
+import ensureConfirmedEmail from '../helpers/ensureConfirmedEmail.js';
 import UIPopover from './UIPopover.js';
-import UIWindowEmailConfirmationRequired from './UIWindowEmailConfirmationRequired.js';
 import UIContextMenu from './UIContextMenu.js';
 import UIAlert from './UIAlert.js';
 import UIWindowPublishWorker from './UIWindowPublishWorker.js';
@@ -1255,23 +1254,7 @@ async function UIItem (options) {
                 menu_items.push({
                     html: i18n('publish_as_serverless_worker'),
                     onClick: async function () {
-                        if ( window.user.is_temp &&
-                            !await UIWindowSaveAccount({
-                                send_confirmation_code: true,
-                                message: 'Please create an account to proceed.',
-                                window_options: {
-                                    backdrop: true,
-                                    close_on_backdrop_click: false,
-                                },
-                            }) )
-                        {
-                            return;
-                        }
-                        else if ( !window.user.email_confirmed && !await UIWindowEmailConfirmationRequired() )
-                        {
-                            return;
-                        }
-
+                        if ( ! await ensureConfirmedEmail(i18n('save_account_to_publish')) ) return;
                         UIWindowPublishWorker(options.uid, $(el_item).attr('data-name'), $(el_item).attr('data-path'));
                     },
                 });

src/gui/src/UI/UIWindow.js

@@ -25,6 +25,7 @@ import UIAuthLogin from './Auth/UIAuthLogin.js';
 import UIWindowItemProperties from './UIWindowItemProperties.js';
 import new_context_menu_item from '../helpers/newContextMenuItem.js';
 import refresh_item_container from '../helpers/refreshItemContainer.js';
+import { atPath } from '../helpers/pathElements.js';
 import UIWindowAppFeedback from './UIWindowAppFeedback.js';
 import launch_app from '../helpers/launchApp.js';
 import publish_as_website from '../helpers/publishAsWebsite.js';
@@ -3348,7 +3349,7 @@ window.update_window_path = async function (el_window, target_path) {
 
     // update sidebar items' active status
     $(el_window).find('.window-sidebar-item').removeClass('window-sidebar-item-active');
-    $(el_window).find(`.window-sidebar-item[data-path="${html_encode(target_path)}"]`).addClass('window-sidebar-item-active');
+    atPath($(el_window).find('.window-sidebar-item'), target_path).addClass('window-sidebar-item-active');
 
     // clean
     $(el_window).find('.explore-table-headers-th > .header-sort-icon').html('');
@@ -3432,8 +3433,8 @@ window.update_window_path = async function (el_window, target_path) {
         }
     }
 
-    $(el_window).attr('data-path', html_encode(target_path));
-    $(el_window).attr('data-name', html_encode(path.basename(target_path)));
+    $(el_window).attr('data-path', target_path);
+    $(el_window).attr('data-name', path.basename(target_path));
 
     // /stat
     if ( target_path === window.shared_path ) {
@@ -3447,7 +3448,7 @@ window.update_window_path = async function (el_window, target_path) {
         try {
             puter.fs.stat({ path: target_path, consistency: 'eventual' }).then(fsentry => {
                 // the window may have moved on while this stat was in flight
-                if ( $(el_window).attr('data-path') !== html_encode(target_path) ) {
+                if ( $(el_window).attr('data-path') !== target_path ) {
                     return;
                 }
                 $(el_window).removeClass(`window-${ $(el_window).attr('data-uid')}`);
@@ -3491,9 +3492,9 @@ window.update_window_path = async function (el_window, target_path) {
                     $(el_window).find('.window-head-title').text(fsentry.name);
                 }
                 // data-name
-                $(el_window).attr('data-name', html_encode(fsentry.name));
+                $(el_window).attr('data-name', fsentry.name);
                 // data-path
-                $(el_window).attr('data-path', html_encode(target_path));
+                $(el_window).attr('data-path', target_path);
                 $(el_window_navbar_path_input).val(target_path);
                 $(el_window_navbar_path_input).attr('data-path', target_path);
                 // update layout

src/gui/src/UI/UIWindowEmailConfirmationRequired.js

@@ -20,12 +20,24 @@
 import UIWindow from './UIWindow.js';
 import UIAlert from './UIAlert.js';
 
+/**
+ * Asks for the code sent to the user's email.
+ *
+ * @returns {Promise<boolean>} True once the email is confirmed, false when the
+ *   window closes without it. A logout, from its footer or anywhere else,
+ *   leaves it unsettled, so a gate that reopens it on false doesn't race the
+ *   logout.
+ */
 function UIWindowEmailConfirmationRequired (options) {
     return new Promise(async (resolve) => {
         options = options ?? {};
         options.window_options = options.window_options ?? {};
         let final_code = '';
         let is_checking_code = false;
+        let logging_out = false;
+        let submit_timer = null;
+        let code_sent = false;
+        let close_after_check = false;
 
         const submit_btn_txt = 'Confirm Email';
 
@@ -92,6 +104,20 @@ function UIWindowEmailConfirmationRequired (options) {
             window_css: {
                 height: 'initial',
             },
+            // A code on its way to the server answers for the window, so the
+            // window waits for it. One not sent yet isn't sent.
+            on_before_exit: () => {
+                if ( code_sent && ! logging_out ) {
+                    close_after_check = true;
+                    return false;
+                }
+                clearTimeout(submit_timer);
+                return true;
+            },
+            // A no-op after a confirmation, which resolves first.
+            on_close: () => {
+                if ( ! logging_out && window.auth_token ) resolve(false);
+            },
             body_css: {
                 padding: '30px',
                 width: 'initial',
@@ -122,7 +148,8 @@ function UIWindowEmailConfirmationRequired (options) {
             // set animation
             $(el_window).find('.email-confirm-btn').html('<svg style="width:20px; margin-top: 5px;" xmlns="http://www.w3.org/2000/svg" height="24" width="24" viewBox="0 0 24 24"><title>circle anim</title><g fill="#fff" class="nc-icon-wrapper"><g class="nc-loop-circle-24-icon-f"><path d="M12 24a12 12 0 1 1 12-12 12.013 12.013 0 0 1-12 12zm0-22a10 10 0 1 0 10 10A10.011 10.011 0 0 0 12 2z" fill="#eee" opacity=".4"></path><path d="M24 12h-2A10.011 10.011 0 0 0 12 2V0a12.013 12.013 0 0 1 12 12z" data-color="color-2"></path></g><style>.nc-loop-circle-24-icon-f{--animation-duration:0.5s;transform-origin:12px 12px;animation:nc-loop-circle-anim var(--animation-duration) infinite linear}@keyframes nc-loop-circle-anim{0%{transform:rotate(0)}100%{transform:rotate(360deg)}}</style></g></svg>');
 
-            setTimeout(() => {
+            submit_timer = setTimeout(() => {
+                code_sent = true;
                 $.ajax({
                     url: `${window.api_origin }/confirm-email`,
                     type: 'POST',
@@ -141,9 +168,13 @@ function UIWindowEmailConfirmationRequired (options) {
                     },
                     success: function (res) {
                         if ( res.email_confirmed ) {
+                            // Callers check window.user next, before the refresh lands.
+                            if ( window.user ) window.user.email_confirmed = true;
+                            resolve(true);
+                            code_sent = false;
+                            close_after_check = false;
                             $(el_window).close();
                             window.refresh_user_data(window.auth_token);
-                            resolve(true);
                         } else {
                             $(el_window).find('.error').html('Invalid confirmation code.');
                             $(el_window).find('.error').fadeIn();
@@ -155,7 +186,8 @@ function UIWindowEmailConfirmationRequired (options) {
                         }
                     },
                     error: function (res) {
-                        $(el_window).find('.error').html(html_encode(res.responseJSON.error));
+                        // A network failure has no body to read.
+                        $(el_window).find('.error').html(html_encode(res.responseJSON?.error ?? i18n('error_unknown_cause')));
                         $(el_window).find('.error').fadeIn();
                         $(el_window).find('.digit-input').val('');
                         $(el_window).find('.digit-input').first().focus();
@@ -165,6 +197,8 @@ function UIWindowEmailConfirmationRequired (options) {
                     },
                     complete: function () {
                         is_checking_code = false;
+                        code_sent = false;
+                        if ( close_after_check ) $(el_window).close();
                     },
                 });
             }, 1000);
@@ -172,6 +206,7 @@ function UIWindowEmailConfirmationRequired (options) {
 
         // send email confirmation
         $(el_window).find('.send-conf-email').on('click', function (e) {
+            $(el_window).find('.error').hide();
             $.ajax({
                 url: `${window.api_origin }/send-confirm-email`,
                 type: 'POST',
@@ -194,19 +229,22 @@ function UIWindowEmailConfirmationRequired (options) {
                     });
                     $(el_window).find('.digit-input').first().focus();
                 },
-                complete: function () {
+                error: function (res) {
+                    $(el_window).find('.error').html(html_encode(res.responseJSON?.error ?? i18n('error_unknown_cause')));
+                    $(el_window).find('.error').fadeIn();
                 },
             });
         });
 
         // logout
         $(el_window).find('.conf-email-log-out').on('click', function (e) {
+            logging_out = true;
             window.logout();
             $(el_window).close();
         });
 
         // Elements
-        const numberCodeForm = document.querySelector('[data-number-code-form]');
+        const numberCodeForm = $(el_window).find('[data-number-code-form]').get(0);
         const numberCodeInputs = [...numberCodeForm.querySelectorAll('[data-number-code-input]')];
 
         // Event listeners

src/gui/src/UI/UIWindowEmailConfirmationRequired.test.js

@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+// @vitest-environment jsdom
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import jQuery from '../lib/jquery-3.6.1/jquery-3.6.1.min.js';
+
+// Renders the body and, as the real window does, asks on_before_exit before
+// closing and runs on_close once it's removed.
+vi.mock('./UIWindow.js', () => ({
+    default: vi.fn(async (opts) => {
+        const el = document.createElement('div');
+        el.className = `window ${opts.window_class}`;
+        el.innerHTML = opts.body_content;
+        el.onClose = opts.on_close;
+        el.onBeforeExit = opts.on_before_exit;
+        document.body.append(el);
+        return el;
+    }),
+}));
+vi.mock('./UIAlert.js', () => ({ default: vi.fn() }));
+
+globalThis.def = globalThis.def ?? (value => value);
+
+const { default: UIWindowEmailConfirmationRequired } = await import('./UIWindowEmailConfirmationRequired.js');
+
+const PENDING = Symbol('pending');
+const settled = (promise) => Promise.race([promise, new Promise((r) => setTimeout(() => r(PENDING), 0))]);
+const win = () => jQuery('.window-confirm-email-using-code');
+
+/** Opens the window and waits for it to render. Returns its answer, still pending. */
+const open = async (options) => {
+    const result = UIWindowEmailConfirmationRequired(options);
+    await vi.waitFor(() => expect(win()).toHaveLength(1));
+    return { result };
+};
+
+const enterCode = () => {
+    const first = document.querySelector('[data-number-code-input="0"]');
+    first.value = '123456';
+    first.dispatchEvent(new Event('input', { bubbles: true }));
+};
+
+beforeEach(() => {
+    document.body.innerHTML = '';
+    globalThis.$ = jQuery;
+    jQuery.fn.close = function () {
+        this.each((_, el) => {
+            if ( ! el.isConnected || el.onBeforeExit?.() === false ) return;
+            el.remove();
+            el.onClose?.();
+        });
+        return this;
+    };
+    globalThis.i18n = (key) => key;
+    globalThis.html_encode = (value) => String(value);
+    window.icons = {};
+    window.api_origin = 'https://api.puter.test';
+    window.auth_token = 'token-1';
+    window.user = { email: '[email protected]', email_confirmed: false };
+    window.refresh_user_data = vi.fn();
+    window.logout = vi.fn();
+});
+
+afterEach(() => {
+    vi.useRealTimers();
+    vi.restoreAllMocks();
+    delete jQuery.fn.close;
+});
+
+describe('UIWindowEmailConfirmationRequired', () => {
+    it('resolves true once the code confirms the email, and says so on window.user straight away', async () => {
+        const ajax = vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => {
+            opts.success({ email_confirmed: true });
+            opts.complete?.();
+        });
+        const { result } = await open();
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+
+        await expect(result).resolves.toBe(true);
+        expect(ajax).toHaveBeenCalledWith(expect.objectContaining({
+            url: 'https://api.puter.test/confirm-email',
+            data: JSON.stringify({ code: '123456' }),
+        }));
+        // Callers read it next, before the refresh lands.
+        expect(window.user.email_confirmed).toBe(true);
+        expect(window.refresh_user_data).toHaveBeenCalledWith('token-1');
+        expect(win()).toHaveLength(0);
+    });
+
+    it('stays open on a wrong code', async () => {
+        vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => {
+            opts.success({ email_confirmed: false });
+            opts.complete?.();
+        });
+        const { result } = await open();
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+
+        expect(await settled(result)).toBe(PENDING);
+        expect(win()).toHaveLength(1);
+        expect(window.user.email_confirmed).toBe(false);
+    });
+
+    it.each([
+        ['the server\'s error', { status: 429, responseJSON: { error: 'Too many requests.' } }, 'Too many requests.'],
+        ['an unknown error on a network failure', { status: 0 }, 'error_unknown_cause'],
+    ])('shows %s and lets the user try again', async (_label, xhr, shown) => {
+        vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => {
+            opts.error(xhr);
+            opts.complete?.();
+        });
+        const { result } = await open();
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+
+        expect(win().find('.error').text()).toBe(shown);
+        expect(win().find('.digit-input').prop('disabled')).toBe(false);
+        expect(win().find('.email-confirm-btn').text()).toBe('Confirm Email');
+        expect(await settled(result)).toBe(PENDING);
+    });
+
+    it('takes the code typed in a second window open over another', async () => {
+        const ajax = vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => {
+            opts.success({ email_confirmed: true });
+            opts.complete?.();
+        });
+        const { result: under } = await open();
+        const over = UIWindowEmailConfirmationRequired();
+        await vi.waitFor(() => expect(win()).toHaveLength(2));
+        vi.useFakeTimers();
+        const first = win().get(1).querySelector('[data-number-code-input="0"]');
+        first.value = '123456';
+        first.dispatchEvent(new Event('input', { bubbles: true }));
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+
+        await expect(over).resolves.toBe(true);
+        expect(ajax).toHaveBeenCalledWith(expect.objectContaining({ data: JSON.stringify({ code: '123456' }) }));
+        expect(win()).toHaveLength(1);
+        expect(await settled(under)).toBe(PENDING);
+    });
+
+    it.each([
+        ['the server\'s error', { status: 429, responseJSON: { error: 'Too many requests.' } }, 'Too many requests.'],
+        ['an unknown error on a network failure', { status: 0 }, 'error_unknown_cause'],
+    ])('shows %s when a new code can\'t be sent', async (_label, xhr, shown) => {
+        const ajax = vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => opts.error(xhr));
+        await open();
+        win().find('.send-conf-email').trigger('click');
+
+        expect(ajax).toHaveBeenCalledWith(expect.objectContaining({ url: 'https://api.puter.test/send-confirm-email' }));
+        expect(win().find('.error').text()).toBe(shown);
+    });
+
+    it('resolves false when it closes without a confirmation', async () => {
+        const { result } = await open();
+        win().close();
+        await expect(result).resolves.toBe(false);
+    });
+
+    it('sends no code when it closes before the code is sent', async () => {
+        const ajax = vi.spyOn(jQuery, 'ajax').mockImplementation(() => {});
+        const { result } = await open();
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(500);
+        win().close();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+
+        await expect(result).resolves.toBe(false);
+        expect(ajax).not.toHaveBeenCalled();
+        expect(window.user.email_confirmed).toBe(false);
+    });
+
+    it.each([
+        ['true when the code confirms the email', { email_confirmed: true }, true],
+        ['false when it doesn\'t', { email_confirmed: false }, false],
+    ])('waits for a code already sent when asked to close, and resolves %s', async (_label, answer, expected) => {
+        let respond;
+        vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => {
+            respond = () => {
+                opts.success(answer);
+                opts.complete();
+            };
+        });
+        const { result } = await open();
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+        win().close();
+        expect(win()).toHaveLength(1);
+        expect(await settled(result)).toBe(PENDING);
+
+        respond();
+        await expect(result).resolves.toBe(expected);
+        expect(win()).toHaveLength(0);
+        expect(window.user.email_confirmed).toBe(expected);
+    });
+
+    it('closes once a code already sent fails, when asked to close meanwhile', async () => {
+        let fail;
+        vi.spyOn(jQuery, 'ajax').mockImplementation((opts) => {
+            fail = () => {
+                opts.error({ status: 0 });
+                opts.complete();
+            };
+        });
+        const { result } = await open();
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+        win().close();
+        fail();
+
+        await expect(result).resolves.toBe(false);
+        expect(win()).toHaveLength(0);
+    });
+
+    it('closes for a logout from its footer while a code is being checked', async () => {
+        vi.spyOn(jQuery, 'ajax').mockImplementation(() => {});
+        const { result } = await open({ logout_in_footer: true });
+        vi.useFakeTimers();
+        enterCode();
+        await vi.advanceTimersByTimeAsync(1000);
+        vi.useRealTimers();
+        win().find('.conf-email-log-out').trigger('click');
+
+        expect(win()).toHaveLength(0);
+        expect(await settled(result)).toBe(PENDING);
+    });
+
+    it('stays unsettled when a logout elsewhere closes it, so a gate doesn\'t reopen it', async () => {
+        const { result } = await open();
+        // As the logout handler leaves things when it closes every window.
+        window.auth_token = null;
+        win().close();
+        expect(win()).toHaveLength(0);
+        expect(await settled(result)).toBe(PENDING);
+    });
+
+    it('stays unsettled on a logout from its footer, so a gate doesn\'t reopen it', async () => {
+        const { result } = await open({ logout_in_footer: true });
+        win().find('.conf-email-log-out').trigger('click');
+        expect(window.logout).toHaveBeenCalledTimes(1);
+        expect(win()).toHaveLength(0);
+        expect(await settled(result)).toBe(PENDING);
+    });
+});

src/gui/src/UI/UIWindowPublishWebsite.js

@@ -19,6 +19,7 @@
 
 import UIWindow from './UIWindow.js';
 import UIWindowMyWebsites from './UIWindowMyWebsites.js';
+import { underPath } from '../helpers/pathElements.js';
 
 async function UIWindowPublishWebsite (target_dir_uid, target_dir_name, target_dir_path) {
     let h = '';
@@ -110,7 +111,7 @@ async function UIWindowPublishWebsite (target_dir_uid, target_dir_name, target_d
             });
 
             // find all items whose path starts with target_dir_path
-            $(`.item[data-path^="${target_dir_path}/"]`).each(function () {
+            underPath('.item', target_dir_path).each(function () {
                 // show the link badge
                 $(this).find('.item-has-website-url-badge').show();
                 // update item's website_url attribute

src/gui/src/UI/UIWindowPublishWorker.js

@@ -19,6 +19,7 @@
 
 import UIWindow from './UIWindow.js';
 import UIWindowMyWebsites from './UIWindowMyWebsites.js';
+import { underPath } from '../helpers/pathElements.js';
 
 async function UIWindowPublishWorker (target_dir_uid, target_dir_name, target_dir_path) {
     let h = '';
@@ -117,7 +118,7 @@ async function UIWindowPublishWorker (target_dir_uid, target_dir_name, target_di
             });
 
             // find all items whose path starts with target_dir_path
-            $(`.item[data-path^="${target_dir_path}/"]`).each(function () {
+            underPath('.item', target_dir_path).each(function () {
                 // show the link badge
                 // $(this).find('.item-has-website-url-badge').show();
                 // update item's website_url attribute

src/gui/src/UI/UIWindowSaveAccount.js

@@ -117,6 +117,12 @@ async function UIWindowSaveAccount (options) {
             },
         });
 
+        // One is already open, which UIWindow focused instead of opening this.
+        if ( ! el_window ) {
+            resolve(false);
+            return;
+        }
+
         $(el_window).find('.signup-btn').on('click', function (e) {
             // todo do some basic validation client-side
 
@@ -164,10 +170,15 @@ async function UIWindowSaveAccount (options) {
 
                     //close this window
                     if ( data.user.requires_email_confirmation && !data.user.email_confirmed ) {
+                        // The code window brings its own backdrop; this
+                        // one under it would dim the page twice.
+                        const $backdrop = $(el_window).closest('.window-backdrop');
+                        $backdrop.css('visibility', 'hidden');
                         let is_verified = await UIWindowEmailConfirmationRequired({
                             stay_on_top: true,
                             has_head: true,
                         });
+                        $backdrop.css('visibility', '');
                         resolve(is_verified);
                     } else {
                         resolve(true);

src/gui/src/UI/UIWindowSaveAccount.test.js

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+// @vitest-environment jsdom
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import jQuery from '../lib/jquery-3.6.1/jquery-3.6.1.min.js';
+
+// As the real window does, opens once: a second one focuses the first and returns nothing.
+vi.mock('./UIWindow.js', () => ({
+    default: vi.fn(async (opts) => {
+        if ( document.querySelector('.window-save-account') ) return undefined;
+        const el = document.createElement('div');
+        el.className = `window ${opts.window_class}`;
+        el.innerHTML = opts.body_content;
+        el.onClose = opts.on_close;
+        document.body.append(el);
+        return el;
+    }),
+}));
+vi.mock('./UIWindowEmailConfirmationRequired.js', () => ({ default: vi.fn() }));
+
+globalThis.def = globalThis.def ?? (value => value);
+
+const { default: UIWindowSaveAccount } = await import('./UIWindowSaveAccount.js');
+
+const PENDING = Symbol('pending');
+const settled = (promise) => Promise.race([promise, new Promise((r) => setTimeout(() => r(PENDING), 0))]);
+const win = () => jQuery('.window-save-account');
+
+beforeEach(() => {
+    document.body.innerHTML = '';
+    globalThis.$ = jQuery;
+    jQuery.fn.close = function () {
+        this.each((_, el) => {
+            el.remove();
+            el.onClose?.();
+        });
+        return this;
+    };
+    globalThis.i18n = (key) => key;
+    globalThis.html_encode = (value) => String(value);
+    window.icons = {};
+    window.uuidv4 = () => 'id-1';
+});
+
+afterEach(() => {
+    delete jQuery.fn.close;
+});
+
+describe('UIWindowSaveAccount', () => {
+    it('resolves false when it closes without saving', async () => {
+        const result = UIWindowSaveAccount();
+        await vi.waitFor(() => expect(win()).toHaveLength(1));
+        win().close();
+        await expect(result).resolves.toBe(false);
+    });
+
+    it('resolves false when one is already open, and leaves that one waiting', async () => {
+        const first = UIWindowSaveAccount();
+        await vi.waitFor(() => expect(win()).toHaveLength(1));
+
+        await expect(UIWindowSaveAccount()).resolves.toBe(false);
+        expect(win()).toHaveLength(1);
+        expect(await settled(first)).toBe(PENDING);
+    });
+});

src/gui/src/helpers.js

@@ -23,6 +23,7 @@ import { archiveEntryPath } from './helpers/archiveEntryPath.js';
 import get_html_element_from_options from './helpers/getHtmlElementFromOptions.js';
 import globToRegExp from './helpers/globToRegExp.js';
 import item_icon from './helpers/itemIcon.js';
+import { atPath, retargetPaths, underPath } from './helpers/pathElements.js';
 import { is_owned_by_me, trash_path_for } from './helpers/pathOwner.js';
 import { invalidate_shared_roots } from './helpers/sharedAccess.js';
 import truncate_filename from './helpers/truncateFilename.js';
@@ -1178,7 +1179,7 @@ window.create_folder = async (basedir, appendto_element) => {
             rename: true,
             overwrite: false,
             success: function (data) {
-                const el_created_dir = $(appendto_element).find(`.item[data-path="${html_encode(dirname)}/${html_encode(data.name)}"]`);
+                const el_created_dir = atPath($(appendto_element).find('.item'), `${dirname}/${data.name}`);
                 if ( el_created_dir.length > 0 ) {
                     window.activate_item_name_editor(el_created_dir);
 
@@ -1211,7 +1212,7 @@ window.create_file = async (options) => {
             generateThumbnails: true,
             thumbnailGenerator: createUploadThumbnailGenerator(),
             success: async function (data) {
-                const created_file = $(appendto_element).find(`.item[data-path="${html_encode(dirname)}/${html_encode(data.name)}"]`);
+                const created_file = atPath($(appendto_element).find('.item'), `${dirname}/${data.name}`);
                 if ( created_file.length > 0 ) {
                     window.activate_item_name_editor(created_file);
 
@@ -1583,8 +1584,8 @@ window.delete_item = async function (el_item, descendants_only = false) {
         // close all windows with matching uids
         $(`.window-${ $(el_item).attr('data-uid')}`).close();
         // close all windows that belong to a descendant of this item
-        // todo this has to be case-insensitive but the `i` selector doesn't work on ^=
-        $(`.window[data-path^="${$(el_item).attr('data-path')}/"]`).close();
+        // todo this has to be case-insensitive
+        underPath('.window', $(el_item).attr('data-path')).close();
     });
 
     try {
@@ -1605,7 +1606,7 @@ window.delete_item = async function (el_item, descendants_only = false) {
                 window.update_explorer_footer_selected_items_count(this);
             });
             // update all shortcuts to this item
-            $(`.item[data-shortcut_to_path="${html_encode($(el_item).attr('data-path'))}" i]`).attr('data-shortcut_to_path', '');
+            atPath('.item', $(el_item).attr('data-path'), 'data-shortcut_to_path').attr('data-shortcut_to_path', '');
         });
     } catch ( err ) {
         // Nothing was deleted: bring back what was faded out above.
@@ -1619,7 +1620,7 @@ window.move_clipboard_items = function (el_target_container, target_path) {
     let el_items = [];
     if ( window.clipboard.length > 0 ) {
         for ( let i = 0; i < window.clipboard.length; i++ ) {
-            el_items.push($(`.item[data-path="${html_encode(window.clipboard[i])}" i]`));
+            el_items.push(atPath('.item', window.clipboard[i]));
         }
         if ( el_items.length > 0 )
         {
@@ -1961,24 +1962,18 @@ window.move_items = async function (el_items, dest_path, is_undo = false) {
                 // skip next loop iteration because this iteration was successful
                 item_with_same_name_already_exists = false;
 
-                // update all shortcut_to_path — compare raw attribute values
-                // (item rows store paths unencoded, so an html_encode()d
-                // selector misses names containing & < > " ')
-                const moved_from_path_lc = String($(el_item).attr('data-path') || '').toLowerCase();
-                $('.item[data-shortcut_to_path]').filter(function () {
-                    return String($(this).attr('data-shortcut_to_path')).toLowerCase() === moved_from_path_lc;
-                }).attr('data-shortcut_to_path', fsentry.path);
+                const moved_from_path = $(el_item).attr('data-path');
+
+                // update all shortcut_to_path
+                atPath('.item', moved_from_path, 'data-shortcut_to_path').attr('data-shortcut_to_path', fsentry.path);
 
                 // Remove all items with matching uids from their OLD location(s).
                 // Exclude any row already at the item's new path: a concurrent
                 // item.moved socket handler may have just created a row at the
                 // destination (e.g. the dashboard file view showing the target
                 // directory), and removing by uid alone would delete it too.
-                // Raw case-insensitive compare, for the same reason as above.
-                const dest_item_path_lc = fsentry.path.toLowerCase();
-                $(`.item[data-uid='${$(el_item).attr('data-uid')}']`).not(function () {
-                    return String($(this).attr('data-path') || '').toLowerCase() === dest_item_path_lc;
-                }).fadeOut(150, function () {
+                const $moved_items = $(`.item[data-uid='${$(el_item).attr('data-uid')}']`);
+                $moved_items.not(atPath($moved_items, fsentry.path)).fadeOut(150, function () {
                     // find all parent windows that contain this item
                     let parent_windows = $(`.item[data-uid='${$(el_item).attr('data-uid')}']`).closest('.window');
                     // remove this item
@@ -1992,23 +1987,23 @@ window.move_items = async function (el_items, dest_path, is_undo = false) {
 
                 // if trashing, close windows of trashed items and its descendants
                 if ( is_trashing ) {
-                    $(`.window[data-path="${html_encode($(el_item).attr('data-path'))}" i]`).close();
-                    // todo this has to be case-insensitive but the `i` selector doesn't work on ^=
-                    $(`.window[data-path^="${html_encode($(el_item).attr('data-path'))}/"]`).close();
+                    atPath('.window', moved_from_path).close();
+                    // todo this has to be case-insensitive
+                    underPath('.window', moved_from_path).close();
                 }
 
                 // update all paths of its and its descendants' open windows
                 else {
-                    // todo this has to be case-insensitive but the `i` selector doesn't work on ^=
-                    $(`.window[data-path^="${html_encode($(el_item).attr('data-path'))}/"], .window[data-path="${html_encode($(el_item).attr('data-path'))}" i]`).each(function () {
-                        window.update_window_path(this, $(this).attr('data-path').replace($(el_item).attr('data-path'), path.join(item_dest_path, fsentry.name)));
+                    // todo this has to be case-insensitive
+                    underPath('.window', moved_from_path).add(atPath('.window', moved_from_path)).each(function () {
+                        window.update_window_path(this, path.join(item_dest_path, fsentry.name) + $(this).attr('data-path').slice(moved_from_path.length));
                     });
                 }
 
                 // The dashboard's Back/Forward follows a moved folder, and
                 // forgets a trashed one.
                 if ( $(el_item).attr('data-is_dir') === '1' ) {
-                    window.dashboard_object?.folderMoved?.($(el_item).attr('data-path'), is_trashing ? null : fsentry.path);
+                    window.dashboard_object?.folderMoved?.(moved_from_path, is_trashing ? null : fsentry.path);
                 }
 
                 if ( is_trashing ) {
@@ -2032,7 +2027,7 @@ window.move_items = async function (el_items, dest_path, is_undo = false) {
 
                 // create new item on matching containers
                 const options = {
-                    appendTo: $(`.item-container[data-path="${html_encode(item_dest_path)}" i]`),
+                    appendTo: atPath('.item-container', item_dest_path),
                     immutable: fsentry.immutable || (fsentry.writable === false),
                     associated_app_name: fsentry.associated_app?.name,
                     uid: fsentry.uid,
@@ -2063,8 +2058,8 @@ window.move_items = async function (el_items, dest_path, is_undo = false) {
                 // see if any of the directories in the path of this file is new AND
                 // if these new path have any open parents that need to be updated
                 resp.parent_dirs_created?.forEach(async dir => {
-                    let item_container = $(`.item-container[data-path="${html_encode(path.dirname(dir.path))}" i]`);
-                    if ( item_container.length > 0 && $(`.item[data-path="${html_encode(dir.path)}" i]`).length === 0 ) {
+                    let item_container = atPath('.item-container', path.dirname(dir.path));
+                    if ( item_container.length > 0 && atPath('.item', dir.path).length === 0 ) {
                         UIItem({
                             appendTo: item_container,
                             immutable: false,
@@ -2090,7 +2085,7 @@ window.move_items = async function (el_items, dest_path, is_undo = false) {
                 });
 
                 //sort each container
-                $(`.item-container[data-path="${html_encode(item_dest_path)}" i]`).each(function () {
+                atPath('.item-container', item_dest_path).each(function () {
                     window.sort_items(this, $(this).attr('data-sort_by'), $(this).attr('data-sort_order'));
                 });
             } catch ( err ) {
@@ -2285,9 +2280,7 @@ window.updateSubdomainsForItems = async function (fsentries, container) {
 
             // If not found by uid, try path-based search
             if ( $item.length === 0 && fsentry.path ) {
-                // Escape special characters in path for jQuery selector
-                const escapedPath = fsentry.path.replace(/[!"#$%&'()*+,.\/:;<=>?@[\\\]^`{|}~]/g, '\\$&');
-                $item = $(document).find(`.item[data-path="${escapedPath}"]`);
+                $item = atPath('.item', fsentry.path);
             }
 
             if ( $item.length > 0 ) {
@@ -3301,20 +3294,7 @@ window.rename_file = async (options, new_name, old_name, old_path, el_item, el_i
             $(`.item[data-uid='${$(el_item).attr('data-uid')}']`).attr('data-path', new_path);
             $(`.window-${options.uid}`).attr('data-path', new_path);
 
-            // Update all elements that have matching paths
-            $(`[data-path="${html_encode(old_path)}" i]`).each(function () {
-                $(this).attr('data-path', new_path);
-                if ( $(this).hasClass('window-navbar-path-dirname') )
-                {
-                    $(this).text(new_name);
-                }
-            });
-
-            // Update the paths of all elements whose paths start with `old_path`
-            $(`[data-path^="${`${html_encode(old_path) }/`}"]`).each(function () {
-                const new_el_path = $(this).attr('data-path').replace(`${old_path }/`, `${new_path}/`);
-                $(this).attr('data-path', new_el_path);
-            });
+            retargetPaths(old_path, new_path, new_name);
 
             // Update the 'Sites Cache'
             if ( $(el_item).attr('data-has_website') === '1' )

src/gui/src/helpers.pathElements.test.js

@@ -0,0 +1,148 @@
+// @vitest-environment jsdom
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import jQuery from './lib/jquery-3.6.1/jquery-3.6.1.min.js';
+
+vi.mock('./UI/UIAlert.js', () => ({ default: vi.fn() }));
+vi.mock('./UI/UIItem.js', () => ({ default: vi.fn() }));
+vi.mock('./UI/Auth/UIAuthLogin.js', () => ({ default: vi.fn() }));
+vi.mock('./UI/UIWindowProgress.js', () => ({ default: vi.fn() }));
+vi.mock('./UI/UIWindowSaveAccount.js', () => ({ default: vi.fn() }));
+
+globalThis.$ = jQuery;
+globalThis.jQuery = jQuery;
+globalThis.i18n = key => key;
+globalThis.def = globalThis.def ?? (value => value);
+globalThis.use = globalThis.use ?? (() => class {});
+globalThis.html_encode = value => jQuery('<div>').text(value).html();
+
+await import('./helpers.js');
+const { default: apply_item_added_to_containers } = await import('./helpers/applyItemAddedToContainers.js');
+const { default: UIItem } = await import('./UI/UIItem.js');
+const { atPath, retargetPaths, underPath } = await import('./helpers/pathElements.js');
+
+// A plain name, then names holding characters a selector or HTML treats specially.
+const NAMES = ['Reports 2024', 'R&D', "Dan's files", 'the "big" one', 'a<b>c', 'back\\slash'];
+
+const el = (className, attrs) => jQuery('<div>').addClass(className).attr(attrs).appendTo(document.body);
+
+beforeEach(() => {
+    document.body.innerHTML = '';
+    jQuery.fx.off = true;
+    jQuery.fn.close = vi.fn();
+    jQuery.fn.removeItems = vi.fn();
+    window.icons = { 'folder.svg': 'folder.svg' };
+    window.actions_history = [];
+    window.user = { username: 'alice' };
+    window.update_window_path = vi.fn();
+    window.sort_items = vi.fn();
+    window.update_explorer_footer_item_count = vi.fn();
+    window.update_explorer_footer_selected_items_count = vi.fn();
+    window.determine_website_url = () => '';
+    UIItem.mockClear();
+});
+
+describe.each(NAMES)('a folder named %s', (name) => {
+    const folderPath = `/alice/${name}`;
+
+    it('keeps its open subfolders and their items on the new path when renamed', async () => {
+        const $item = el('item', { 'data-uid': 'u1', 'data-path': folderPath, 'data-name': name });
+        const $crumb = el('window-navbar-path-dirname', { 'data-path': folderPath });
+        const $subWindow = el('window', { 'data-path': `${folderPath}/sub` });
+        const $subItem = el('item', { 'data-uid': 'u2', 'data-path': `${folderPath}/sub/a.txt` });
+        globalThis.puter = { fs: { rename: ({ success }) => success({ uid: 'u1', name: 'Plain', is_dir: true }) } };
+
+        await new Promise(resolve => {
+            window.rename_file({ uid: 'u1', name, path: folderPath, is_dir: true }, 'Plain', name, folderPath,
+                $item[0], null, null, null, '', false, resolve);
+        });
+
+        expect($item.attr('data-path')).toBe('/alice/Plain');
+        expect($crumb.attr('data-path')).toBe('/alice/Plain');
+        expect($crumb.text()).toBe('Plain');
+        expect($subWindow.attr('data-path')).toBe('/alice/Plain/sub');
+        expect($subItem.attr('data-path')).toBe('/alice/Plain/sub/a.txt');
+    });
+
+    it('closes the windows of its subfolders when deleted', async () => {
+        const $item = el('item', { 'data-uid': 'u1', 'data-path': folderPath });
+        el('window', { 'data-path': `${folderPath}/sub` });
+        el('window', { 'data-path': '/alice/Other/sub' });
+        el('item', { 'data-uid': 'u3', 'data-shortcut_to_path': folderPath });
+        globalThis.puter = { fs: { delete: vi.fn().mockResolvedValue() } };
+
+        await window.delete_item($item[0]);
+
+        const closed = jQuery.fn.close.mock.contexts.flatMap($set => $set.toArray().map(w => jQuery(w).attr('data-path')));
+        expect(closed).toEqual([`${folderPath}/sub`]);
+        expect(puter.fs.delete).toHaveBeenCalled();
+        expect(jQuery('[data-uid="u3"]').attr('data-shortcut_to_path')).toBe('');
+    });
+
+    it('shows an item another tab added to it', async () => {
+        const $container = el('item-container', { 'data-path': folderPath });
+
+        await apply_item_added_to_containers({ uid: 'u9', dirpath: folderPath, path: `${folderPath}/new.txt`, name: 'new.txt', is_dir: true });
+
+        expect(UIItem).toHaveBeenCalledTimes(1);
+        expect(UIItem.mock.calls[0][0].appendTo.toArray()).toEqual([$container[0]]);
+    });
+});
+
+describe('retargetPaths', () => {
+    it('ignores the case of the renamed path itself, and leaves its siblings alone', () => {
+        const $window = el('window', { 'data-path': '/alice/docs' });
+        const $sibling = el('item', { 'data-path': '/alice/Docs 2/a.txt' });
+
+        retargetPaths('/alice/Docs', '/alice/Papers', 'Papers');
+
+        expect($window.attr('data-path')).toBe('/alice/Papers');
+        expect($sibling.attr('data-path')).toBe('/alice/Docs 2/a.txt');
+    });
+
+    it('writes a new name holding a replacement pattern as it is', () => {
+        const $item = el('item', { 'data-path': '/alice/Docs/a.txt' });
+
+        retargetPaths('/alice/Docs', '/alice/$& and $1', '$& and $1');
+
+        expect($item.attr('data-path')).toBe('/alice/$& and $1/a.txt');
+    });
+
+    it('changes nothing when the old path is unknown', () => {
+        const $item = el('item', { 'data-path': '/alice/Docs/a.txt' });
+
+        retargetPaths(undefined, '/alice/Papers', 'Papers');
+
+        expect($item.attr('data-path')).toBe('/alice/Docs/a.txt');
+    });
+});
+
+describe.each([undefined, null, ''])('a lookup for the path %s', (missing) => {
+    it('matches nothing, including elements that have no path', () => {
+        el('item', { 'data-path': '/alice/a.txt', 'data-shortcut_to_path': '' });
+        el('window', { 'data-path': '' });
+        el('window', { 'data-path': '/alice/Docs' });
+
+        expect(atPath('.item', missing, 'data-shortcut_to_path')).toHaveLength(0);
+        expect(atPath('.window', missing)).toHaveLength(0);
+        expect(underPath('.window', missing)).toHaveLength(0);
+    });
+});

src/gui/src/helpers/applyItemAddedToContainers.js

@@ -19,6 +19,7 @@
 
 import UIItem from '../UI/UIItem.js';
 import item_icon from './itemIcon.js';
+import { atPath } from './pathElements.js';
 import { select_added_item_if_pending } from './uploadSelection.js';
 
 /**
@@ -37,7 +38,7 @@ import { select_added_item_if_pending } from './uploadSelection.js';
  * @param {object} item fsentry from the `item.added` event
  */
 const apply_item_added_to_containers = async function (item) {
-    const $containers = $(`.item-container[data-path='${html_encode(item.dirpath)}' i]`);
+    const $containers = atPath('.item-container', item.dirpath);
     if ( $containers.length === 0 ) {
         return;
     }

src/gui/src/helpers/ensureCanPublish.js

@@ -17,8 +17,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-import UIWindowSaveAccount from '../UI/UIWindowSaveAccount.js';
-import UIWindowEmailConfirmationRequired from '../UI/UIWindowEmailConfirmationRequired.js';
+import ensureConfirmedEmail from './ensureConfirmedEmail.js';
 
 /**
  * Walks a temporary account through saving itself, and an unconfirmed one
@@ -30,22 +29,7 @@ import UIWindowEmailConfirmationRequired from '../UI/UIWindowEmailConfirmationRe
  */
 const ensure_can_publish = async function (required) {
     if ( ! required ) return true;
-    if ( window.user.is_temp && ! await UIWindowSaveAccount({
-        send_confirmation_code: true,
-        message: i18n('save_account_to_publish'),
-        window_options: {
-            backdrop: true,
-            close_on_backdrop_click: false,
-        },
-    }) ) {
-        return false;
-    }
-    // Saving refreshes window.user; a deployment that doesn't confirm at
-    // signup leaves the new account unconfirmed, and it still has to confirm.
-    if ( ! window.user.email_confirmed ) {
-        return !! await UIWindowEmailConfirmationRequired();
-    }
-    return true;
+    return ensureConfirmedEmail(i18n('save_account_to_publish'));
 };
 
 export default ensure_can_publish;

src/gui/src/helpers/ensureConfirmedEmail.js

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import UIWindowSaveAccount from '../UI/UIWindowSaveAccount.js';
+import UIWindowEmailConfirmationRequired from '../UI/UIWindowEmailConfirmationRequired.js';
+
+// The walk-through showing, which a call made meanwhile joins.
+let showing = null;
+
+const walkThrough = async (message, window_options) => {
+    if ( window.user.is_temp && ! await UIWindowSaveAccount({
+        send_confirmation_code: true,
+        message,
+        window_options: {
+            backdrop: true,
+            close_on_backdrop_click: false,
+            ...window_options,
+        },
+    }) ) {
+        return false;
+    }
+    // Saving refreshes window.user; a deployment that doesn't confirm at
+    // signup leaves the new account unconfirmed, and it still has to confirm.
+    if ( ! window.user.email_confirmed ) {
+        return !! await UIWindowEmailConfirmationRequired({ window_options });
+    }
+    return true;
+};
+
+/**
+ * Walks a temporary account through saving itself, and an unconfirmed one
+ * through confirming its email, showing each window at most once. A call made
+ * while the windows show settles with them, without opening its own.
+ *
+ * @param {string} message - What the save-account window says to a temporary account.
+ * @param {Record<string, unknown>} [window_options] - Passed to both windows, such as
+ *   `stay_on_top` to show them above an app.
+ * @returns {Promise<boolean>} Whether the email is confirmed; false if the user backed out of either step.
+ */
+const ensureConfirmedEmail = (message, window_options = {}) => {
+    showing ??= walkThrough(message, window_options).finally(() => {
+        showing = null;
+    });
+    return showing;
+};
+
+export default ensureConfirmedEmail;

src/gui/src/helpers/ensureConfirmedEmail.test.js

@@ -0,0 +1,133 @@
+// @vitest-environment jsdom
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+vi.mock('../UI/UIWindowSaveAccount.js', () => ({ default: vi.fn() }));
+vi.mock('../UI/UIWindowEmailConfirmationRequired.js', () => ({ default: vi.fn() }));
+
+const { default: ensureConfirmedEmail } = await import('./ensureConfirmedEmail.js');
+const { default: UIWindowSaveAccount } = await import('../UI/UIWindowSaveAccount.js');
+const { default: UIWindowEmailConfirmationRequired } = await import('../UI/UIWindowEmailConfirmationRequired.js');
+
+beforeEach(() => {
+    UIWindowSaveAccount.mockReset();
+    UIWindowEmailConfirmationRequired.mockReset();
+});
+
+describe('ensureConfirmedEmail', () => {
+    it('shows nothing for a confirmed email', async () => {
+        window.user = { is_temp: false, email_confirmed: true };
+        expect(await ensureConfirmedEmail('save it')).toBe(true);
+        expect(UIWindowSaveAccount).not.toHaveBeenCalled();
+        expect(UIWindowEmailConfirmationRequired).not.toHaveBeenCalled();
+    });
+
+    it.each([true, false])('asks an unconfirmed email for its code once, and answers %s as it does', async (answer) => {
+        window.user = { is_temp: false, email_confirmed: false };
+        UIWindowEmailConfirmationRequired.mockResolvedValueOnce(answer);
+        expect(await ensureConfirmedEmail('save it')).toBe(answer);
+        expect(UIWindowEmailConfirmationRequired).toHaveBeenCalledTimes(1);
+        expect(UIWindowSaveAccount).not.toHaveBeenCalled();
+    });
+
+    it('has a temporary account saved first, with the message given', async () => {
+        window.user = { is_temp: true };
+        UIWindowSaveAccount.mockResolvedValueOnce(false);
+        expect(await ensureConfirmedEmail('save it')).toBe(false);
+        expect(UIWindowSaveAccount).toHaveBeenCalledWith(expect.objectContaining({
+            message: 'save it',
+            send_confirmation_code: true,
+        }));
+        expect(UIWindowEmailConfirmationRequired).not.toHaveBeenCalled();
+    });
+
+    it('passes the window options to both windows', async () => {
+        window.user = { is_temp: true };
+        UIWindowSaveAccount.mockImplementationOnce(async () => {
+            window.user = { is_temp: false, email_confirmed: false };
+            return true;
+        });
+        UIWindowEmailConfirmationRequired.mockResolvedValueOnce(true);
+        await ensureConfirmedEmail('save it', { stay_on_top: true });
+        expect(UIWindowSaveAccount.mock.calls[0][0].window_options).toEqual({
+            backdrop: true,
+            close_on_backdrop_click: false,
+            stay_on_top: true,
+        });
+        expect(UIWindowEmailConfirmationRequired).toHaveBeenCalledWith({ window_options: { stay_on_top: true } });
+    });
+
+    it('asks no code again from an account that confirmed it while saving', async () => {
+        window.user = { is_temp: true };
+        // Saving asked for the code, which marks window.user confirmed.
+        UIWindowSaveAccount.mockImplementationOnce(async () => {
+            window.user = { is_temp: false, email_confirmed: true };
+            return true;
+        });
+        expect(await ensureConfirmedEmail('save it')).toBe(true);
+        expect(UIWindowEmailConfirmationRequired).not.toHaveBeenCalled();
+    });
+
+    it('asks a just-saved account for its code when saving left it unconfirmed', async () => {
+        window.user = { is_temp: true };
+        UIWindowSaveAccount.mockImplementationOnce(async () => {
+            window.user = { is_temp: false, email_confirmed: false };
+            return true;
+        });
+        UIWindowEmailConfirmationRequired.mockResolvedValueOnce(true);
+        expect(await ensureConfirmedEmail('save it')).toBe(true);
+        expect(UIWindowEmailConfirmationRequired).toHaveBeenCalledTimes(1);
+    });
+
+    it('answers a call made while the code window shows with that window, without a second one', async () => {
+        window.user = { is_temp: false, email_confirmed: false };
+        let answer;
+        UIWindowEmailConfirmationRequired.mockReturnValueOnce(new Promise((resolve) => {
+            answer = resolve;
+        }));
+        const first = ensureConfirmedEmail('save it');
+        const second = ensureConfirmedEmail('save it');
+        await Promise.resolve();
+        expect(UIWindowEmailConfirmationRequired).toHaveBeenCalledTimes(1);
+        answer(true);
+        expect(await Promise.all([first, second])).toEqual([true, true]);
+    });
+
+    it('answers a call made while the save-account window shows with that window', async () => {
+        window.user = { is_temp: true };
+        let answer;
+        UIWindowSaveAccount.mockReturnValueOnce(new Promise((resolve) => {
+            answer = resolve;
+        }));
+        const first = ensureConfirmedEmail('save it');
+        const second = ensureConfirmedEmail('save it');
+        expect(UIWindowSaveAccount).toHaveBeenCalledTimes(1);
+        answer(false);
+        expect(await Promise.all([first, second])).toEqual([false, false]);
+    });
+
+    it('opens a new window for a call made after the last one answered', async () => {
+        window.user = { is_temp: false, email_confirmed: false };
+        UIWindowEmailConfirmationRequired.mockResolvedValueOnce(false).mockResolvedValueOnce(true);
+        expect(await ensureConfirmedEmail('save it')).toBe(false);
+        expect(await ensureConfirmedEmail('save it')).toBe(true);
+        expect(UIWindowEmailConfirmationRequired).toHaveBeenCalledTimes(2);
+    });
+});

src/gui/src/helpers/pathElements.js

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2024-present Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Narrows `elements` to those whose `attr` is `path`, ignoring case. Reads the
+ * attribute, because a path can hold any character a selector can't.
+ *
+ * @param {string | Element | JQuery} elements - a selector or a set of elements
+ * @param {string} path
+ * @param {string} [attr]
+ * @returns {JQuery}
+ */
+export const atPath = (elements, path, attr = 'data-path') => {
+    // Without this, a missing path matches every element whose attribute is empty.
+    if ( ! path ) return $();
+    const wanted = String(path).toLowerCase();
+    return $(elements).filter(function () {
+        const value = this.getAttribute(attr);
+        return value !== null && value.toLowerCase() === wanted;
+    });
+};
+
+/**
+ * Narrows `elements` to those whose `data-path` is inside the folder at `path`.
+ *
+ * @param {string | Element | JQuery} elements - a selector or a set of elements
+ * @param {string} path
+ * @returns {JQuery}
+ */
+export const underPath = (elements, path) => {
+    if ( ! path ) return $();
+    const prefix = `${path}/`;
+    return $(elements).filter(function () {
+        return this.getAttribute('data-path')?.startsWith(prefix) === true;
+    });
+};
+
+/**
+ * Points every element at `oldPath`, or inside it, to `newPath`.
+ *
+ * @param {string} oldPath
+ * @param {string} newPath
+ * @param {string} newName - shown by the breadcrumbs that pointed at `oldPath`
+ */
+export const retargetPaths = (oldPath, newPath, newName) => {
+    if ( ! oldPath ) return;
+    const $inside = underPath('[data-path]', oldPath);
+    atPath('[data-path]', oldPath).each(function () {
+        $(this).attr('data-path', newPath);
+        if ( $(this).hasClass('window-navbar-path-dirname') ) {
+            $(this).text(newName);
+        }
+    });
+    $inside.each(function () {
+        $(this).attr('data-path', newPath + $(this).attr('data-path').slice(oldPath.length));
+    });
+};

src/gui/src/helpers/popupFrame.js

@@ -30,6 +30,7 @@ export const FRAMED_POPUP_ACTIONS = new Set([
     'show-save-file-picker',
     'show-directory-picker',
     'upgrade',
+    'request-email-confirmation',
 ]);
 
 // Actions a frame shows only for the user the framing page is signed in as.
@@ -38,11 +39,12 @@ const HOST_USER_ACTIONS = new Set([
     'show-save-file-picker',
     'show-directory-picker',
     'upgrade',
+    'request-email-confirmation',
 ]);
 
 // Actions framed over the whole page with no box, which their own dialog's
 // scrim covers.
-const TRANSPARENT_ACTIONS = new Set(['upgrade']);
+const TRANSPARENT_ACTIONS = new Set(['upgrade', 'request-email-confirmation']);
 
 const UPGRADE_REASONS = new Set(['funds', 'subscription', 'storage']);
 const UPGRADE_METHOD_MAX = 200;
@@ -64,9 +66,10 @@ export const POPUP_FRAME_MSG = 'puterPopupFrame';
 // The popup's query parameters a framing page may pass, in the fragment.
 const FRAGMENT_PARAMS = ['msg_id', 'options', 'request_auth'];
 
-// The account checks a sign-in can show (email, phone, card), which are
-// windows rather than auth screens.
-const ACCOUNT_CHECK_WINDOWS = '.window-confirm-email-using-code, .window-confirm-phone-using-code, .window-card-verification';
+// The account checks a sign-in can show (email, phone, card), and the
+// save-account window an email confirmation shows a temporary account first,
+// which are windows rather than auth screens.
+const ACCOUNT_CHECK_WINDOWS = '.window-confirm-email-using-code, .window-confirm-phone-using-code, .window-card-verification, .window-save-account';
 
 // What a framed popup shows first; until one is on the page the framing page
 // keeps the frame hidden behind its loading scrim.
@@ -210,19 +213,23 @@ export const focusOnFrameFocus = (win) => {
 };
 
 /**
- * Closes a framed sign-in on Escape in one of its account checks, as Escape
- * on its auth screens does. Those screens handle Escape themselves; the
- * account checks are windows, which don't.
+ * Closes a framed sign-in or email confirmation on Escape in one of its
+ * account windows, as Escape on the sign-in's auth screens does. Those
+ * screens handle Escape themselves; the account windows don't.
  *
  * @param {Window} win
+ * @param {(accountWindow: Element) => void} [close] - closes the account window
+ *   Escape was pressed in, when its own closing is what answers the frame;
+ *   without it the frame closes
  */
-export const closeAccountChecksOnEscape = (win) => {
+export const closeAccountChecksOnEscape = (win, close = () => win.close()) => {
     win.document.addEventListener('keydown', (e) => {
         // Safari sends the Escape that ends an IME conversion as keyCode 229
         // with isComposing false.
         if ( e.key !== 'Escape' || e.defaultPrevented || e.isComposing || e.keyCode === 229 ) return;
         const el = e.target === win.document.body ? win.document.querySelector('.window-active') : e.target;
-        if ( el?.closest?.(ACCOUNT_CHECK_WINDOWS) ) win.close();
+        const accountWindow = el?.closest?.(ACCOUNT_CHECK_WINDOWS);
+        if ( accountWindow ) close(accountWindow);
     });
 };
 
@@ -244,6 +251,37 @@ export const canShowUpgradeFrame = (win, session) =>
     !session.requires_card_verification &&
     !session.requires_password_change;
 
+/**
+ * Whether a framed email confirmation can show for the GUI session `session`
+ * (its `/whoami`): no check other than the email is waiting, since those show
+ * at boot with no way to close the frame.
+ *
+ * @param {Record<string, unknown> | null} session
+ * @returns {boolean}
+ */
+export const canShowEmailConfirmationFrame = (session) =>
+    !!session &&
+    !session.requires_phone_verification &&
+    !session.requires_card_verification &&
+    !session.requires_password_change;
+
+/**
+ * Confirms the email of the framed user with `confirm`, which shows the GUI's
+ * windows for it. An email already confirmed resolves true without showing
+ * anything, so the page never shows the frame.
+ *
+ * @param {Window} win
+ * @param {() => Promise<boolean>} confirm
+ * @param {(state: 'ready') => void} tell
+ * @returns {Promise<boolean>}
+ */
+export const confirmEmailInFrame = async (win, confirm, tell) => {
+    if ( win.user?.email_confirmed === true ) return true;
+    // The windows center themselves when they open.
+    await whenFrameSized(win, () => tell('ready'));
+    return (await confirm()) === true;
+};
+
 /**
  * What prompted a framed upgrade, from its `reason` and `method` fragment
  * parameters, keeping only well-formed values.

src/gui/src/helpers/popupFrame.test.js

@@ -2,8 +2,10 @@
 import { afterEach, describe, expect, it, vi } from 'vitest';
 import {
     POPUP_FRAME_MSG,
+    canShowEmailConfirmationFrame,
     canShowUpgradeFrame,
     closeAccountChecksOnEscape,
+    confirmEmailInFrame,
     focusOnFrameFocus,
     framedPopupAction,
     framedPopupParams,
@@ -48,6 +50,7 @@ describe('framedPopupAction', () => {
         ['/embed/show-save-file-picker', 'show-save-file-picker'],
         ['/embed/show-directory-picker', 'show-directory-picker'],
         ['/embed/upgrade', 'upgrade'],
+        ['/embed/request-email-confirmation', 'request-email-confirmation'],
         ['/embed/apps', null],
         ['/embed/feedback', null],
         ['/embed/request-permission', null],
@@ -82,6 +85,7 @@ describe('framesHostUser', () => {
         ['show-save-file-picker', true],
         ['show-directory-picker', true],
         ['upgrade', true],
+        ['request-email-confirmation', true],
         ['sign-in', false],
         [null, false],
     ])('%s serves only the framing page\'s user: %s', (action, expected) => {
@@ -129,6 +133,83 @@ describe('canShowUpgradeFrame', () => {
     });
 });
 
+describe('canShowEmailConfirmationFrame', () => {
+    const session = { uuid: 'u-1' };
+
+    it('shows for a session with nothing to verify, or only the email', () => {
+        expect(canShowEmailConfirmationFrame(session)).toBe(true);
+        expect(canShowEmailConfirmationFrame({ ...session, requires_email_confirmation: true })).toBe(true);
+    });
+
+    it.each([
+        'requires_phone_verification',
+        'requires_card_verification',
+        'requires_password_change',
+    ])('leaves an account with %s unavailable', (check) => {
+        expect(canShowEmailConfirmationFrame({ ...session, [check]: true })).toBe(false);
+    });
+
+    it('needs a session', () => {
+        expect(canShowEmailConfirmationFrame(null)).toBe(false);
+    });
+});
+
+describe('confirmEmailInFrame', () => {
+    afterEach(() => {
+        vi.useRealTimers();
+    });
+
+    const confirmWindow = ({ user, width = 1280, height = 800 } = {}) =>
+        Object.assign(new EventTarget(), { user, innerWidth: width, innerHeight: height });
+
+    it('resolves true for a confirmed email without showing anything', async () => {
+        const confirm = vi.fn();
+        const tell = vi.fn();
+        await expect(confirmEmailInFrame(confirmWindow({ user: { email_confirmed: true } }), confirm, tell))
+            .resolves.toBe(true);
+        expect(confirm).not.toHaveBeenCalled();
+        expect(tell).not.toHaveBeenCalled();
+    });
+
+    it.each([
+        ['confirms', true, true],
+        ['backs out', false, false],
+        ['gets no answer', undefined, false],
+    ])('resolves whether the email is confirmed when the user %s', async (_label, answer, expected) => {
+        const confirm = vi.fn(async () => answer);
+        await expect(confirmEmailInFrame(confirmWindow({ user: { email_confirmed: false } }), confirm, vi.fn()))
+            .resolves.toBe(expected);
+        expect(confirm).toHaveBeenCalledTimes(1);
+    });
+
+    it('walks a temporary account through it', async () => {
+        const confirm = vi.fn(async () => true);
+        await expect(confirmEmailInFrame(confirmWindow({ user: { is_temp: true } }), confirm, vi.fn()))
+            .resolves.toBe(true);
+        expect(confirm).toHaveBeenCalledTimes(1);
+    });
+
+    it('has a hidden frame shown before its windows open', async () => {
+        vi.useFakeTimers();
+        const win = confirmWindow({ user: {}, width: 0, height: 0 });
+        const sizes = [];
+        const tell = vi.fn();
+        const result = confirmEmailInFrame(win, async () => {
+            sizes.push([win.innerWidth, win.innerHeight]);
+            return true;
+        }, tell);
+        await vi.advanceTimersByTimeAsync(0);
+        expect(tell).toHaveBeenCalledWith('ready');
+        expect(sizes).toEqual([]);
+
+        win.innerWidth = 1280;
+        win.innerHeight = 800;
+        win.dispatchEvent(new Event('resize'));
+        await expect(result).resolves.toBe(true);
+        expect(sizes).toEqual([[1280, 800]]);
+    });
+});
+
 describe('showFramedUpgrade', () => {
     const upgradeWindow = (openAsWindow, { width = 1280, height = 800 } = {}) => {
         const created = [];
@@ -315,12 +396,16 @@ describe('startPopupFrame', () => {
         );
     });
 
-    it('lets the framing page show through an upgrade frame only', () => {
+    it('lets the framing page show through an upgrade or email confirmation frame only', () => {
         startPopupFrame({ ...frameWindow(), location: { pathname: '/embed/sign-in' } }, HOST);
         expect(document.documentElement.classList.contains('popup-frame-transparent')).toBe(false);
 
         startPopupFrame({ ...frameWindow(), location: { pathname: '/embed/upgrade' } }, HOST);
         expect(document.documentElement.classList.contains('popup-frame-transparent')).toBe(true);
+
+        document.documentElement.classList.remove('popup-frame-transparent');
+        startPopupFrame({ ...frameWindow(), location: { pathname: '/embed/request-email-confirmation' } }, HOST);
+        expect(document.documentElement.classList.contains('popup-frame-transparent')).toBe(true);
     });
 
     it('sends a boolean field with a state', () => {
@@ -486,6 +571,7 @@ describe('closeAccountChecksOnEscape', () => {
         'window-confirm-email-using-code',
         'window-confirm-phone-using-code',
         'window-card-verification',
+        'window-save-account',
     ])('closes on Escape in the %s window', (cls) => {
         const win = signInWindow();
         escapeOn(showWindow(win, `window window-active ${cls}`).querySelector('input'));
@@ -511,4 +597,15 @@ describe('closeAccountChecksOnEscape', () => {
         escapeOn(showWindow(win, 'window window-alert').querySelector('input'));
         expect(win.close).not.toHaveBeenCalled();
     });
+
+    it('hands the account window to the close it is given, leaving the frame open', () => {
+        const win = { document: document.implementation.createHTMLDocument(), close: vi.fn() };
+        const close = vi.fn();
+        closeAccountChecksOnEscape(win, close);
+        const el = showWindow(win);
+        escapeOn(el.querySelector('input'));
+        escapeOn(win.document.body);
+        expect(close.mock.calls).toEqual([[el], [el]]);
+        expect(win.close).not.toHaveBeenCalled();
+    });
 });

src/gui/src/helpers/refreshItemContainer.js

@@ -103,9 +103,9 @@ const refresh_item_container = function (el_item_container, options) {
             $(el_window).attr('data-sort_order', fsentry.sort_order ?? 'asc');
             $(el_window).attr('data-layout', fsentry.layout ?? 'icons');
             // data-name
-            $(el_window).attr('data-name', html_encode(fsentry.name));
+            $(el_window).attr('data-name', fsentry.name);
             // data-path
-            $(el_window).attr('data-path', html_encode(container_path));
+            $(el_window).attr('data-path', container_path);
             $(el_window).find('.window-navbar-path-input').val(container_path);
             $(el_window).find('.window-navbar-path-input').attr('data-path', container_path);
         }

src/gui/src/helpers/refreshItemContainer.test.js

@@ -167,6 +167,15 @@ describe('refresh_item_container after the window moves to another folder', () =
         expect($('.window').attr('data-uid')).toBe('pictures');
     });
 
+    it('stores a folder name holding HTML characters on the window as it is', async () => {
+        navigate('/alice/R&D');
+
+        pending.stat['/alice/R&D'].resolve({ id: 'rd', name: 'R&D' });
+        await vi.waitFor(() => expect($('.window').attr('data-uid')).toBe('rd'));
+
+        expect($('.window').attr('data-name')).toBe('R&D');
+    });
+
     it('drops a listing that arrives just before the window moves on', async () => {
         vi.useFakeTimers();
         navigate('/alice/Documents');

src/gui/src/helpers/sharedBadge.js

@@ -17,6 +17,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+import { atPath } from './pathElements.js';
+
 /**
  * Whether a `getShares()` list means this item is shared.
  *
@@ -33,10 +35,7 @@ export const has_direct_share = (shares) =>
  * can be on the desktop and in any number of open windows.
  */
 export const mark_item_shared = (path, is_shared) => {
-    if ( ! path ) return;
-    const $items = $('.item').filter(function() {
-        return ($(this).attr('data-path') || '').toLowerCase() === path.toLowerCase();
-    });
+    const $items = atPath('.item', path);
     $items.attr('data-is_shared', is_shared ? 1 : 0);
     $items
         .find('.item-shared-marker')

src/gui/src/i18n/translations/en.js

@@ -557,6 +557,7 @@ const en = {
         saturation: 'Saturation',
         save_account: 'Save account',
         save_account_to_get_copy_link: 'Please create an account to proceed.',
+        save_account_to_proceed: 'Please create an account to proceed.',
         save_account_to_publish: 'Please create an account to proceed.',
         save_session: 'Save session',
         save_session_c2a: 'Create an account to save your current session and avoid losing your work.',

src/gui/src/initgui.js

@@ -48,8 +48,10 @@ import { PROCESS_RUNNING } from './definitions.js';
 import { isAttestedOrigin } from './helpers/attestedOrigin.js';
 import { embedHostUser } from './helpers/embedHostUser.js';
 import {
+    canShowEmailConfirmationFrame,
     canShowUpgradeFrame,
     closeAccountChecksOnEscape,
+    confirmEmailInFrame,
     focusOnFrameFocus,
     framedPopupAction,
     framedPopupParams,
@@ -59,6 +61,7 @@ import {
     startPopupFrame,
 } from './helpers/popupFrame.js';
 import confirm_before_unload from './helpers/confirmBeforeUnload.js';
+import ensureConfirmedEmail from './helpers/ensureConfirmedEmail.js';
 import create_access_token from './helpers/createAccessToken.js';
 import create_gui_token from './helpers/createGuiToken.js';
 import {
@@ -1022,6 +1025,25 @@ const postAuthActions = async (action) => {
         window.tell_popup_frame('closed', { upgraded });
     }
 
+    // -------------------------------------------------------------------------------------
+    // Action: request-email-confirmation — puter.ui.requestEmailConfirmation() on the
+    // first-party page framing it, which hears whether the email is confirmed once the
+    // user is done.
+    // -------------------------------------------------------------------------------------
+    if ( action === 'request-email-confirmation' && window.embedded_in_frame ) {
+        let confirmed = false;
+        try {
+            confirmed = await confirmEmailInFrame(
+                window,
+                () => ensureConfirmedEmail(i18n('save_account_to_proceed')),
+                window.tell_popup_frame,
+            );
+        } catch (e) {
+            console.error('request-email-confirmation action failed', e);
+        }
+        window.tell_popup_frame('closed', { confirmed });
+    }
+
     // -------------------------------------------------------------------------------------
     // Action: attach-custom-domain — puter.hosting.attach() on a website. Hosts the custom
     // domain dialog for `subdomain` and posts the chosen domain back to the opener.
@@ -1588,6 +1610,10 @@ window.initgui = async function (options) {
     window.gui_action = action;
 
     if (window.embedded_in_frame && action === 'sign-in') closeAccountChecksOnEscape(window);
+    // Closing the window answers the frame, after any code it already sent.
+    if (window.embedded_in_frame && action === 'request-email-confirmation') {
+        closeAccountChecksOnEscape(window, (accountWindow) => $(accountWindow).close());
+    }
 
     if (action === 'oidc-2fa') {
         const result = oidcChallenge?.token && await UIAuth2FA(oidcChallenge.token);
@@ -1789,7 +1815,8 @@ window.initgui = async function (options) {
             if (
                 !host_user ||
                 session_user !== host_user ||
-                (action === 'upgrade' && !canShowUpgradeFrame(window, session))
+                (action === 'upgrade' && !canShowUpgradeFrame(window, session)) ||
+                (action === 'request-email-confirmation' && !canShowEmailConfirmationFrame(session))
             ) {
                 window.tell_popup_frame('unavailable');
                 return;
@@ -2409,8 +2436,12 @@ window.initgui = async function (options) {
             // assertVerifiedAccount): email → phone (SMS) → card, or card →
             // phone → email when the account clears email last.
             let card_gate_cleared_by_fallback = false;
+            // A framed email confirmation asks for the code itself, in a
+            // window the user can close.
+            const confirmsEmailInAction =
+                window.embedded_in_frame && action === 'request-email-confirmation';
             const emailGate = async () => {
-                if (whoami.requires_email_confirmation) {
+                if (whoami.requires_email_confirmation && !confirmsEmailInAction) {
                     let is_verified;
                     do {
                         is_verified = await UIWindowEmailConfirmationRequired({

src/puter-js/index.d.ts

@@ -18,6 +18,7 @@ declare global {
 // -- Shared --
 export type {
     APILoggingConfig,
+    EmailConfirmationResult,
     ListPage,
     ListPaginationOptions,
     ListStreamOptions,
@@ -37,6 +38,7 @@ export type {
     AIMessageContent,
     ChatMessage,
     ChatOptions,
+    ServiceSpeed,
     ChatResponse,
     ChatResponseChunk,
     ChatResponseStream,

src/puter-js/src/lib/guiEmbed.js

@@ -443,7 +443,10 @@ export const showFeedbackEmbed = ({ guiOrigin, userUuid }) => mountGuiEmbed({
     },
 });
 
-/** Popup actions a first-party page shows framed, each in a box its popup window's size. */
+/**
+ * Popup actions a first-party page shows framed, each in a box its popup
+ * window's size. Any other covers the page, and its dialog draws its own scrim.
+ */
 const POPUP_FRAME_BOXES = {
     'sign-in': { width: 600, height: 700 },
     'show-open-file-picker': { width: 700, height: 400 },
@@ -473,8 +476,8 @@ const UNBOXED_POPUP_FRAMES = {
  * @template T
  * @param {Object} opts
  * @param {string} opts.guiOrigin
- * @param {'sign-in' | 'show-open-file-picker' | 'show-save-file-picker' | 'show-directory-picker' | 'upgrade'} opts.action
- * @param {Record<string, string>} opts.fragment - the popup's parameters, and `user` for a picker or the upgrade
+ * @param {'sign-in' | 'show-open-file-picker' | 'show-save-file-picker' | 'show-directory-picker' | 'upgrade' | 'request-email-confirmation'} opts.action
+ * @param {Record<string, string>} opts.fragment - the popup's parameters, and `user` for a picker, the upgrade or the email confirmation
  * @param {string} opts.title - the frame's accessible name
  * @param {string} [opts.closeLabel] - puts a close button on the frame
  * @param {(data?: Record<string, unknown>) => T} opts.closed

src/puter-js/src/lib/types.js

@@ -59,6 +59,14 @@
  * or when the upgrade opened in a new tab instead.
  */
 
+/**
+ * How `puter.ui.requestEmailConfirmation()` ended.
+ *
+ * @typedef {Object} EmailConfirmationResult
+ * @property {boolean} response `true` when the user's email is confirmed, including when it already
+ * was. `false` when the user closed the dialog first, or when a website couldn't show it.
+ */
+
 /**
  * The legacy positional callbacks most methods accept alongside the promise
  * they return.

src/puter-js/src/modules/UI.js

@@ -538,6 +538,9 @@ export class UIModule extends EventListener {
     // The framed upgrade showing, which a call made while it's open joins.
     #upgradeFrame = null;
 
+    // The framed email confirmation showing, which a call made while it's open joins.
+    #emailConfirmationFrame = null;
+
     // Holds the callback functions for the various events
     // that are triggered when a watched item has changed.
     itemWatchCallbackFunctions = [];
@@ -716,7 +719,7 @@ export class UIModule extends EventListener {
      * The page's signed-in user that a frame is shown for, from the cached
      * whoami when there is one, or null without a uuid.
      *
-     * @returns {Promise<{ uuid: string } | null>}
+     * @returns {Promise<{ uuid: string, email_confirmed?: boolean } | null>}
      */
     async #frameUser () {
         const known = await Promise.resolve(puter.whoami ?? puter.whoamiCache_).catch(() => null);
@@ -1334,17 +1337,59 @@ export class UIModule extends EventListener {
     };
 
     /**
-     * Asks the desktop to walk the user through confirming their email.
-     * Resolves once the dialog closes.
+     * Walks the user through confirming their email: a temporary account is
+     * saved first, then the user enters the code sent to their address.
+     * Resolves once they're done, or right away when the email is already
+     * confirmed.
      *
-     * @returns {Promise<unknown>}
+     * Inside an app the desktop shows it. On a signed-in first-party page one
+     * label under the Puter origin, it shows in a frame over the page, and
+     * `response` is false when the frame can't show it. Anywhere else the
+     * promise never settles, since a website has no desktop to ask.
+     *
+     * @returns {Promise<import('../lib/types.js').EmailConfirmationResult>}
      */
     requestEmailConfirmation () {
-        return new Promise((resolve, reject) => {
+        if ( this.#canFrameForUser() ) return this.#showEmailConfirmationFrame();
+        return new Promise((resolve) => {
             this.#postMessageWithCallback('requestEmailConfirmation', resolve, { });
         });
     };
 
+    /**
+     * The email confirmation in a frame over the page, for the page's
+     * signed-in user. A call made while one is showing settles with it, and
+     * an email the page already knows is confirmed resolves without one.
+     *
+     * @returns {Promise<import('../lib/types.js').EmailConfirmationResult>}
+     */
+    #showEmailConfirmationFrame () {
+        if ( this.#emailConfirmationFrame ) return this.#emailConfirmationFrame;
+        this.#emailConfirmationFrame = (async () => {
+            try {
+                const user = await this.#frameUser();
+                // A confirmed email never goes back to unconfirmed, so this
+                // skips the loading scrim the frame would show while it boots.
+                if ( user?.email_confirmed === true ) return { response: true };
+                const framed = user && await showPopupFrame({
+                    guiOrigin: puter.defaultGUIOrigin,
+                    action: 'request-email-confirmation',
+                    fragment: { user: user.uuid },
+                    title: 'Confirm your email',
+                    closed: (data) => ({ response: data?.confirmed === true }),
+                    onMessage: () => {},
+                });
+                // The page's cached whoami still reads it as unconfirmed,
+                // and would frame the next call too.
+                if ( framed?.response ) user.email_confirmed = true;
+                return framed || { response: false };
+            } finally {
+                this.#emailConfirmationFrame = null;
+            }
+        })();
+        return this.#emailConfirmationFrame;
+    }
+
     /**
      * Asks the desktop to walk the user through clearing an account
      * verification gate (a 403 `*_required` code — email confirmation, phone

src/puter-js/src/modules/UI.requestEmailConfirmation.test.js

@@ -0,0 +1,200 @@
+// @vitest-environment jsdom
+// @vitest-environment-options {"url": "https://notes.puter.test/doc"}
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+const { UIModule } = await import('./UI.js');
+
+// jsdom has no top-layer dialogs.
+HTMLDialogElement.prototype.showModal = function () {
+    this.open = true;
+};
+HTMLDialogElement.prototype.close = function () {
+    this.open = false;
+};
+
+const GUI_ORIGIN = 'https://puter.test';
+const USER = '0b1c9a52-3f0e-4c7a-9a65-2f6d1e8b7c40';
+
+const frameDialog = () => document.querySelector('dialog.puter-popup-frame');
+const confirmFrame = () => frameDialog()?.querySelector('iframe') ?? null;
+const fragment = () => Object.fromEntries(new URLSearchParams(new URL(confirmFrame().src).hash.slice(1)));
+
+const fromFrame = (data) => window.dispatchEvent(new MessageEvent('message', {
+    data, origin: GUI_ORIGIN, source: confirmFrame().contentWindow,
+}));
+
+const makeUI = (env = 'web') => new UIModule(
+    { env, authToken: 'token-1', APIOrigin: 'https://api.puter.test', appID: 'app-1', util: {} },
+    { appInstanceID: 'instance-1' },
+);
+
+const fakePuter = ({ signedIn = true, guiOrigin = GUI_ORIGIN } = {}) => {
+    globalThis.puter = {
+        defaultGUIOrigin: guiOrigin,
+        whoamiCache_: Promise.resolve({ uuid: USER }),
+        auth: {
+            isSignedIn: () => signedIn,
+            getUser: vi.fn(async () => ({ uuid: USER })),
+        },
+    };
+};
+
+const PENDING = Symbol('pending');
+const settled = (promise) => Promise.race([promise, new Promise((r) => setTimeout(() => r(PENDING), 0))]);
+
+beforeEach(() => {
+    document.body.innerHTML = '';
+    window.open = vi.fn(() => ({ closed: false }));
+    fakePuter();
+});
+
+afterEach(() => {
+    delete globalThis.puter;
+    vi.restoreAllMocks();
+});
+
+describe('ui.requestEmailConfirmation on a signed-in first-party page', () => {
+    it('shows the confirmation in a frame over the page and resolves whether the email is confirmed', async () => {
+        const result = makeUI().requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+
+        expect(new URL(confirmFrame().src).pathname).toBe('/embed/request-email-confirmation');
+        expect(fragment()).toEqual({ user: USER });
+        // It covers the page, and the window inside draws the scrim.
+        expect(frameDialog().querySelector('.puter-popup-frame-box')).toBeNull();
+        expect(frameDialog().querySelector('.puter-popup-frame-close')).toBeNull();
+
+        fromFrame({ msg: 'puterPopupFrame', state: 'loading' });
+        fromFrame({ msg: 'puterPopupFrame', state: 'ready' });
+        expect(frameDialog().open).toBe(true);
+        fromFrame({ msg: 'puterPopupFrame', state: 'closed', confirmed: true });
+
+        await expect(result).resolves.toEqual({ response: true });
+        expect(confirmFrame()).toBeNull();
+        expect(window.open).not.toHaveBeenCalled();
+    });
+
+    it('resolves true without a frame when the page knows the email is confirmed', async () => {
+        puter.whoamiCache_ = Promise.resolve({ uuid: USER, email_confirmed: true });
+        const ui = makeUI();
+        const result = ui.requestEmailConfirmation();
+        // Mounted only after the user lookup, so a frame would be in the DOM by now.
+        await expect(result).resolves.toEqual({ response: true });
+        expect(frameDialog()).toBeNull();
+        expect(window.open).not.toHaveBeenCalled();
+        // The next call looks again rather than reusing the settled one.
+        expect(ui.requestEmailConfirmation()).not.toBe(result);
+    });
+
+    it('resolves true without showing the frame when the GUI finds the email already confirmed', async () => {
+        const result = makeUI().requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        fromFrame({ msg: 'puterPopupFrame', state: 'loading' });
+        fromFrame({ msg: 'puterPopupFrame', state: 'closed', confirmed: true });
+
+        await expect(result).resolves.toEqual({ response: true });
+        expect(frameDialog()).toBeNull();
+    });
+
+    it('resolves the next call true without a frame once the user has confirmed in one', async () => {
+        const ui = makeUI();
+        const first = ui.requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        fromFrame({ msg: 'puterPopupFrame', state: 'ready' });
+        fromFrame({ msg: 'puterPopupFrame', state: 'closed', confirmed: true });
+        await expect(first).resolves.toEqual({ response: true });
+
+        await expect(ui.requestEmailConfirmation()).resolves.toEqual({ response: true });
+        expect(frameDialog()).toBeNull();
+    });
+
+    it('resolves false when the user closes it without confirming', async () => {
+        const result = makeUI().requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        fromFrame({ msg: 'puterPopupFrame', state: 'ready' });
+        // The frame's own close() reports no result.
+        fromFrame({ msg: 'puterPopupFrame', state: 'closed' });
+        await expect(result).resolves.toEqual({ response: false });
+    });
+
+    it('resolves false when Escape on the page dismisses it', async () => {
+        const result = makeUI().requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        fromFrame({ msg: 'puterPopupFrame', state: 'ready' });
+        frameDialog().dispatchEvent(new Event('cancel', { cancelable: true }));
+        await expect(result).resolves.toEqual({ response: false });
+        expect(confirmFrame()).toBeNull();
+    });
+
+    it('settles a call made while it shows with it, without replacing it', async () => {
+        const ui = makeUI();
+        const first = ui.requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        const frame = confirmFrame();
+
+        const second = ui.requestEmailConfirmation();
+
+        expect(second).toBe(first);
+        expect(document.querySelectorAll('dialog.puter-popup-frame')).toHaveLength(1);
+        fromFrame({ msg: 'puterPopupFrame', state: 'ready' });
+        fromFrame({ msg: 'puterPopupFrame', state: 'closed' });
+        await expect(second).resolves.toEqual({ response: false });
+
+        // A later call shows a new one.
+        ui.requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        expect(confirmFrame()).not.toBe(frame);
+    });
+
+    it('resolves false when the frame cannot show it', async () => {
+        const result = makeUI().requestEmailConfirmation();
+        await vi.waitFor(() => expect(confirmFrame()).not.toBeNull());
+        fromFrame({ msg: 'puterPopupFrame', state: 'loading' });
+        fromFrame({ msg: 'puterPopupFrame', state: 'unavailable' });
+
+        await expect(result).resolves.toEqual({ response: false });
+        expect(confirmFrame()).toBeNull();
+        expect(window.open).not.toHaveBeenCalled();
+    });
+
+    it('resolves false when the page has no user to name', async () => {
+        puter.whoamiCache_ = Promise.resolve(null);
+        puter.auth.getUser = vi.fn(async () => {
+            throw new Error('nope');
+        });
+        await expect(makeUI().requestEmailConfirmation()).resolves.toEqual({ response: false });
+        expect(confirmFrame()).toBeNull();
+    });
+});
+
+describe('ui.requestEmailConfirmation elsewhere', () => {
+    it('asks the desktop inside an app and resolves its answer', async () => {
+        const post = vi.spyOn(window, 'postMessage').mockImplementation(() => {});
+        const result = makeUI('app').requestEmailConfirmation();
+
+        expect(post).toHaveBeenCalledWith(expect.objectContaining({
+            msg: 'requestEmailConfirmation',
+            env: 'app',
+            appInstanceID: 'instance-1',
+        }), '*');
+        expect(confirmFrame()).toBeNull();
+
+        const { uuid } = post.mock.calls.find(([data]) => data.msg === 'requestEmailConfirmation')[0];
+        window.dispatchEvent(new MessageEvent('message', {
+            data: { msg: 'requestEmailConfirmationResponded', original_msg_id: uuid, response: true },
+            origin: GUI_ORIGIN,
+            source: window,
+        }));
+        await expect(result).resolves.toMatchObject({ response: true });
+    });
+
+    it.each([
+        ['a signed-out first-party page', { signedIn: false }],
+        ['a page outside the Puter origin', { guiOrigin: 'https://puter.com' }],
+    ])('does not frame on %s', async (_label, options) => {
+        fakePuter(options);
+        const result = makeUI().requestEmailConfirmation();
+        expect(await settled(result)).toBe(PENDING);
+        expect(confirmFrame()).toBeNull();
+    });
+});

src/puter-js/src/modules/ai/chat.js

@@ -20,6 +20,7 @@ const PARAMS_TO_PASS = [
     'verbosity',
     'provider',
     'fallback',
+    'serviceSpeed',
     'image_config',
     'compaction',
     'context_management',
@@ -235,6 +236,10 @@ export async function chat (
     /** @type {ChatOptions & { stream?: boolean }} */
     const userParams = extras.find(isPlainObject) ?? {};
 
+    if (userParams.serviceSpeed !== undefined && !['standard', 'fast', 'ultrafast'].includes(userParams.serviceSpeed)) {
+        throw { code: 'invalid_service_speed', message: 'serviceSpeed must be standard, fast, or ultrafast' };
+    }
+
     // Copy relevant parameters from userParams to requestParams.
     // Use `!== undefined` so legitimate zeros (temperature: 0, max_tokens: 0)
     // are forwarded — truthy checks silently drop them.

src/puter-js/src/modules/ai/types.js

@@ -54,6 +54,12 @@
  * Present on responses only.
  */
 
+/**
+ * Preferred service speed for a chat completion.
+ *
+ * @typedef {'standard' | 'fast' | 'ultrafast'} ServiceSpeed
+ */
+
 /**
  * Options for a chat completion request.
  *
@@ -67,6 +73,8 @@
  * @property {boolean} [vision]
  * @property {string} [driver]
  * @property {string} [provider] The provider to route the request through.
+ * @property {ServiceSpeed} [serviceSpeed] Preferred service speed. Falls back to
+ * fast, then standard when the requested speed is unavailable. Faster service may cost more.
  * @property {boolean} [fallback] Set to `false` to fail the request when the first provider tried
  * fails, instead of retrying it on another provider that serves the same model.
  * @property {Tool[]} [tools] Function/tool definitions the model can call. See Function Calling.
@@ -148,6 +156,7 @@
  * @property {number} [webSearchRequests]
  * @property {number} [webFetchRequests]
  * @property {'fast' | 'standard'} [speed]
+ * @property {ServiceSpeed} [serviceSpeed]
  * @property {string} [serviceTier]
  * @property {Array<{ type: string, model?: string, inputTokens: number, outputTokens: number, cacheReadTokens?: number, cacheWrite5mTokens?: number, cacheWrite30mTokens?: number, cacheWrite1hTokens?: number, cacheWrite12hTokens?: number }>} [iterations]
  * Per-pass breakdown when the upstream ran several passes (compaction, an advisor sub-call).

src/puter-js/tests/api/suites/ai.suite.ts

@@ -97,6 +97,23 @@ const textOf = (result: {
 };
 
 export default suite('ai', {
+    'service speed falls back on unsupported models without changing the normalized response': async t => {
+        useApiToken(t);
+        for (const serviceSpeed of ['standard', 'fast', 'ultrafast'] as const) {
+            const result = await t.puter.ai.chat('Hello', { model: 'fake', serviceSpeed, normalize: true });
+            t.assert.equal(typeof result.message.content, 'string');
+            t.assert.equal(result.usageDetails?.serviceSpeed, 'standard');
+        }
+    },
+    'invalid service speed returns a stable error': async t => {
+        const values = [null, false, true, 0, 1, -1, NaN, Infinity, '', 'invalid',
+            'FAST', 'fast ', ' fast', 'ultraFast', [], ['fast'], {}, { speed: 'fast' },
+            { toString: 'fast' }];
+        for (const serviceSpeed of values) {
+            const error = await errorOf(t, () => t.puter.ai.chat('Hello', { model: 'fake', serviceSpeed: serviceSpeed as never }));
+            t.assert.equal(error.code, 'invalid_service_speed');
+        }
+    },
     'chat with the fake model returns a message': async (t) => {
         useApiToken(t);
         const result = await t.puter.ai.chat('Hello there', {

src/puter-js/tests/e2e/fixtures/request-email-confirmation.html

@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>puter-js test fixture: requestEmailConfirmation</title>
+    <style>
+        body { font-family: system-ui, sans-serif; padding: 16px; }
+        button { padding: 8px 12px; margin-right: 8px; font-size: 14px; }
+        #log { margin-top: 16px; padding: 8px; background: #f5f5f5; border: 1px solid #ddd; min-height: 60px; font-family: monospace; white-space: pre-wrap; }
+        .ready #status { color: green; }
+    </style>
+</head>
+<body>
+    <h1>puter-js requestEmailConfirmation fixture</h1>
+    <p id="status">Loading puter.js…</p>
+
+    <button id="confirm-email" disabled>Confirm email</button>
+
+    <div id="log" data-testid="log"></div>
+
+    <script>
+        window.PUTER_ORIGIN = 'http://puter.localhost:4100';
+        window.PUTER_API_ORIGIN = 'http://api.puter.localhost:4100';
+    </script>
+    <script src="/dist/puter.dev.js"></script>
+    <script>
+        const logEl = document.getElementById('log');
+        const statusEl = document.getElementById('status');
+
+        function log(entry) {
+            const line = document.createElement('div');
+            line.textContent = entry;
+            line.dataset.entry = entry;
+            logEl.appendChild(line);
+        }
+
+        function ready() {
+            document.body.classList.add('ready');
+            statusEl.textContent = `Ready (env=${puter.env})`;
+            document.getElementById('confirm-email').disabled = false;
+        }
+
+        function waitForPuter() {
+            if (window.puter && puter.ui) ready();
+            else setTimeout(waitForPuter, 50);
+        }
+        waitForPuter();
+
+        document.getElementById('confirm-email').addEventListener('click', async () => {
+            try {
+                const result = await puter.ui.requestEmailConfirmation();
+                log(`confirm:${result?.response}`);
+            } catch (e) {
+                log(`confirm:error:${e?.message ?? e}`);
+            }
+        });
+    </script>
+</body>
+</html>

src/puter-js/tests/e2e/specs/popupFrame.spec.js

@@ -514,3 +514,233 @@ test.describe('the upgrade a first-party page shows framed', () => {
         await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
     });
 });
+
+const EMAIL_FRAME = '/embed/request-email-confirmation';
+
+/** Has the email confirmation frame's session read as `patch` says, so the account can need a code. */
+const routeFrameSession = (page, patch) => page.context().route(`${API_ORIGIN}/whoami**`, async (route) => {
+    let frameUrl = '';
+    try {
+        frameUrl = route.request().frame().url();
+    } catch {
+        // A request from no frame, such as a service worker's.
+    }
+    if ( route.request().method() !== 'GET' || ! frameUrl.includes(EMAIL_FRAME) ) return route.fallback();
+    const response = await route.fetch();
+    return route.fulfill({ response, json: { ...(await response.json()), ...patch } });
+});
+
+/**
+ * Answers the code check as the server would for a right code, so no email has
+ * to be read. Given `until`, it answers once that settles.
+ */
+const routeConfirmEmail = (page, until) => page.context().route(`${API_ORIGIN}/confirm-email`, async (route) => {
+    const preflight = route.request().method() === 'OPTIONS';
+    if ( ! preflight ) await until;
+    await route.fulfill({
+        status: preflight ? 204 : 200,
+        headers: {
+            'access-control-allow-origin': PUTER_ORIGIN,
+            'access-control-allow-headers': '*',
+            'access-control-allow-credentials': 'true',
+        },
+        contentType: 'application/json',
+        body: JSON.stringify({ email_confirmed: true }),
+    });
+});
+
+const UNCONFIRMED = { email_confirmed: false, requires_email_confirmation: true };
+
+/** Has the page's own whoami read the email as unconfirmed, as it does for such an account. */
+const pageReadsUnconfirmed = (page) => page.evaluate(async () => {
+    puter.whoami = { ...(await puter.whoamiCache_), email_confirmed: false };
+});
+const codeWindow = (page) => frame(page).locator('.window-confirm-email-using-code');
+
+test.describe('the email confirmation a first-party page shows framed', () => {
+    test('a confirmed email resolves true without a frame', async ({ page }) => {
+        await signInFirstPartyPage(page);
+        const popups = [];
+        page.on('popup', (p) => popups.push(p));
+        const framed = [];
+        page.on('request', (r) => {
+            if ( new URL(r.url()).pathname === EMAIL_FRAME ) framed.push(r.url());
+        });
+        await page.evaluate(() => {
+            window.__mounted = false;
+            new MutationObserver(() => {
+                if ( document.querySelector('dialog.puter-popup-frame') ) window.__mounted = true;
+            }).observe(document.body, { childList: true });
+        });
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        expect(await result(page)).toEqual({ ok: true, value: { response: true } });
+        // No loading scrim flashes over the page.
+        expect(await page.evaluate(() => window.__mounted)).toBe(false);
+        expect(framed).toHaveLength(0);
+        expect(popups).toHaveLength(0);
+    });
+
+    test('an email confirmed since the page loaded resolves true without showing a window', async ({ page }) => {
+        await routeFrameSession(page, { email_confirmed: true, requires_email_confirmation: false });
+        await signInFirstPartyPage(page);
+        // Read before the email was confirmed.
+        await pageReadsUnconfirmed(page);
+        const popups = [];
+        page.on('popup', (p) => popups.push(p));
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        expect(await result(page)).toEqual({ ok: true, value: { response: true } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+        expect(popups).toHaveLength(0);
+    });
+
+    test('entering the code in one window over the page resolves true', async ({ page }) => {
+        await routeFrameSession(page, UNCONFIRMED);
+        await routeConfirmEmail(page);
+        await signInFirstPartyPage(page);
+        await pageReadsUnconfirmed(page);
+        const popups = [];
+        page.on('popup', (p) => popups.push(p));
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        await frameReady(page);
+        // One window the user can close, not the boot's email gate as well.
+        await expect(codeWindow(page)).toHaveCount(1);
+        await expect(codeWindow(page).locator('.generic-close-window-button')).toBeVisible();
+        const emailFrame = page.frames().find((f) => new URL(f.url()).pathname === EMAIL_FRAME);
+        // The page shows through around the window.
+        expect(await emailFrame.evaluate(() => [
+            getComputedStyle(document.documentElement).backgroundColor,
+            getComputedStyle(document.body).backgroundColor,
+        ])).toEqual(['rgba(0, 0, 0, 0)', 'rgba(0, 0, 0, 0)']);
+
+        await codeWindow(page).locator('.digit-input').first().click();
+        await page.keyboard.type('123456');
+        expect(await result(page)).toEqual({ ok: true, value: { response: true } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+        expect(popups).toHaveLength(0);
+    });
+
+    test('closing the window resolves false', async ({ page }) => {
+        await routeFrameSession(page, UNCONFIRMED);
+        await signInFirstPartyPage(page);
+        await pageReadsUnconfirmed(page);
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        await frameReady(page);
+        await codeWindow(page).locator('.generic-close-window-button').click();
+        expect(await result(page)).toEqual({ ok: true, value: { response: false } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+    });
+
+    test('Escape on the window resolves false', async ({ page }) => {
+        await routeFrameSession(page, UNCONFIRMED);
+        await signInFirstPartyPage(page);
+        await pageReadsUnconfirmed(page);
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        await frameReady(page);
+        await codeWindow(page).locator('.digit-input').first().click();
+        await page.keyboard.press('Escape');
+        expect(await result(page)).toEqual({ ok: true, value: { response: false } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+    });
+
+    test('Escape while a code is being checked resolves with the check\'s answer', async ({ page }) => {
+        await routeFrameSession(page, UNCONFIRMED);
+        let answer;
+        await routeConfirmEmail(page, new Promise((resolve) => {
+            answer = resolve;
+        }));
+        await signInFirstPartyPage(page);
+        await pageReadsUnconfirmed(page);
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        await frameReady(page);
+        await codeWindow(page).locator('.digit-input').first().click();
+        const sent = page.waitForRequest((r) => r.method() === 'POST' && r.url() === `${API_ORIGIN}/confirm-email`);
+        await page.keyboard.type('123456');
+        await sent;
+        await page.keyboard.press('Escape');
+        answer();
+        expect(await result(page)).toEqual({ ok: true, value: { response: true } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+    });
+
+    test('Escape on the save-account window a temporary account sees resolves false', async ({ page }) => {
+        await routeFrameSession(page, { ...UNCONFIRMED, is_temp: true, email: null });
+        await signInFirstPartyPage(page);
+        await pageReadsUnconfirmed(page);
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        await frameReady(page);
+        await frame(page).locator('.window-save-account .username').click();
+        await page.keyboard.press('Escape');
+        expect(await result(page)).toEqual({ ok: true, value: { response: false } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+    });
+
+    test('a temporary account saves itself, then enters the code in the only window showing', async ({ page }) => {
+        await routeFrameSession(page, { ...UNCONFIRMED, is_temp: true, email: null });
+        await routeConfirmEmail(page);
+        let user;
+        // Saves the account as the server would, leaving the test's own account as it is.
+        await page.context().route(`${API_ORIGIN}/save_account`, (route) => route.fulfill({
+            status: route.request().method() === 'OPTIONS' ? 204 : 200,
+            headers: {
+                'access-control-allow-origin': PUTER_ORIGIN,
+                'access-control-allow-headers': '*',
+                'access-control-allow-credentials': 'true',
+            },
+            contentType: 'application/json',
+            body: JSON.stringify({ user: { ...user, ...UNCONFIRMED, is_temp: false, email: '[email protected]' } }),
+        }));
+        await signInFirstPartyPage(page);
+        user = await page.evaluate(() => puter.whoamiCache_);
+        await pageReadsUnconfirmed(page);
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        await frameReady(page);
+        const saveWindow = frame(page).locator('.window-save-account');
+        await saveWindow.locator('.username').fill('saved');
+        await saveWindow.locator('.email').fill('[email protected]');
+        await saveWindow.locator('.password').fill('a long enough password');
+        await saveWindow.locator('.signup-btn').click();
+
+        await expect(codeWindow(page)).toBeVisible();
+        // One window over one scrim, not the code window over the save-account window's.
+        await expect(saveWindow).toBeHidden();
+        await expect(frame(page).locator('.window-backdrop:visible')).toHaveCount(1);
+        await codeWindow(page).locator('.digit-input').first().click();
+        await page.keyboard.type('123456');
+        expect(await result(page)).toEqual({ ok: true, value: { response: true } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+    });
+
+    test('an account with another check waiting resolves false', async ({ page }) => {
+        await routeFrameSession(page, { ...UNCONFIRMED, requires_phone_verification: true });
+        await signInFirstPartyPage(page);
+        await pageReadsUnconfirmed(page);
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        expect(await result(page)).toEqual({ ok: true, value: { response: false } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+    });
+
+    test('a page signed in as someone else resolves false', async ({ page }) => {
+        await routeFrameSession(page, UNCONFIRMED);
+        await signInFirstPartyPage(page);
+        await page.evaluate(async () => {
+            await puter.whoamiCache_;
+            puter.whoami = { uuid: '00000000-0000-4000-8000-000000000000' };
+        });
+        const popups = [];
+        page.on('popup', (p) => popups.push(p));
+
+        await runFromClick(page, 'puter.ui.requestEmailConfirmation()');
+        expect(await result(page)).toEqual({ ok: true, value: { response: false } });
+        await expect(page.locator('dialog.puter-popup-frame')).toHaveCount(0);
+        expect(popups).toHaveLength(0);
+    });
+});

src/puter-js/tests/e2e/specs/requestEmailConfirmation.spec.js

@@ -0,0 +1,113 @@
+import { test, expect } from '@playwright/test';
+import { registerTestApp, deleteTestApp, gotoTestApp, FIXTURE_URL } from '../helpers/testApp.js';
+
+const PUTER_ORIGIN = process.env.PUTER_TEST_ORIGIN || 'http://puter.localhost:4100';
+const API_ORIGIN = PUTER_ORIGIN.replace('://', '://api.');
+const CONFIRM_FIXTURE_URL = FIXTURE_URL.replace('menubar-contextmenu.html', 'request-email-confirmation.html');
+
+/** Answers the code check as the server would for a right code, so no email has to be read. */
+const routeConfirmEmail = (page) => page.context().route(`${API_ORIGIN}/confirm-email`, (route) => route.fulfill({
+    status: route.request().method() === 'OPTIONS' ? 204 : 200,
+    headers: {
+        'access-control-allow-origin': PUTER_ORIGIN,
+        'access-control-allow-headers': '*',
+        'access-control-allow-credentials': 'true',
+    },
+    contentType: 'application/json',
+    body: JSON.stringify({ email_confirmed: true }),
+}));
+
+/** Sets whether the desktop's user has confirmed their email. */
+const setEmailConfirmed = (page, confirmed) =>
+    page.evaluate((confirmed) => {
+        window.user.is_temp = false;
+        window.user.email_confirmed = confirmed;
+    }, confirmed);
+
+const codeWindow = (page) => page.locator('.window-confirm-email-using-code');
+
+test.describe('puter.ui.requestEmailConfirmation (env=app)', () => {
+    let appName;
+
+    test.beforeEach(async ({ page }) => {
+        appName = await registerTestApp(page, { fixtureURL: CONFIRM_FIXTURE_URL });
+    });
+
+    test.afterEach(async ({ page }) => {
+        await deleteTestApp(page, appName);
+    });
+
+    test('a confirmed email resolves true without a dialog', async ({ page }) => {
+        const appFrame = await gotoTestApp(page, appName);
+        await setEmailConfirmed(page, true);
+
+        await appFrame.locator('#confirm-email').click();
+
+        await expect(appFrame.locator('#log [data-entry="confirm:true"]')).toBeVisible();
+        await expect(codeWindow(page)).toHaveCount(0);
+        await expect(appFrame.locator('#log [data-entry]')).toHaveCount(1);
+    });
+
+    test('entering the code shows one dialog and resolves true', async ({ page }) => {
+        await routeConfirmEmail(page);
+        const appFrame = await gotoTestApp(page, appName);
+        await setEmailConfirmed(page, false);
+
+        await appFrame.locator('#confirm-email').click();
+        await expect(codeWindow(page)).toHaveCount(1);
+        // A click, not fill(), so it fails if the app's window covers the dialog.
+        await codeWindow(page).locator('.digit-input').first().click();
+        await page.keyboard.type('123456');
+
+        await expect(appFrame.locator('#log [data-entry="confirm:true"]')).toBeVisible({ timeout: 15_000 });
+        // No second dialog opens after the first.
+        await page.waitForTimeout(1000);
+        await expect(codeWindow(page)).toHaveCount(0);
+        await expect(appFrame.locator('#log [data-entry]')).toHaveCount(1);
+    });
+
+    test('closing the dialog resolves false', async ({ page }) => {
+        const appFrame = await gotoTestApp(page, appName);
+        await setEmailConfirmed(page, false);
+
+        await appFrame.locator('#confirm-email').click();
+        await expect(codeWindow(page)).toHaveCount(1);
+        await codeWindow(page).locator('.generic-close-window-button').click();
+
+        await expect(appFrame.locator('#log [data-entry="confirm:false"]')).toBeVisible();
+        await expect(codeWindow(page)).toHaveCount(0);
+    });
+
+    test('a call made while the dialog shows gets its answer, with no second dialog', async ({ page }) => {
+        const appFrame = await gotoTestApp(page, appName);
+        await setEmailConfirmed(page, false);
+
+        await appFrame.locator('#confirm-email').click();
+        await expect(codeWindow(page)).toHaveCount(1);
+        // The dialog covers the button, so the app calls again itself.
+        await appFrame.locator('#confirm-email').evaluate((button) => button.click());
+        await page.waitForTimeout(500);
+        await expect(codeWindow(page)).toHaveCount(1);
+        await codeWindow(page).locator('.generic-close-window-button').click();
+
+        await expect(appFrame.locator('#log [data-entry="confirm:false"]')).toHaveCount(2);
+    });
+
+    test('a temporary account calling twice gets both answers from one save-account window', async ({ page }) => {
+        const appFrame = await gotoTestApp(page, appName);
+        await page.evaluate(() => {
+            window.user.is_temp = true;
+            window.user.email_confirmed = false;
+        });
+        const saveWindow = page.locator('.window-save-account');
+
+        await appFrame.locator('#confirm-email').click();
+        await expect(saveWindow).toHaveCount(1);
+        await appFrame.locator('#confirm-email').evaluate((button) => button.click());
+        await page.waitForTimeout(500);
+        await expect(saveWindow).toHaveCount(1);
+        await saveWindow.locator('.generic-close-window-button').click();
+
+        await expect(appFrame.locator('#log [data-entry="confirm:false"]')).toHaveCount(2);
+    });
+});