refactor(core): generalize OpenAI-compatible routing

packages/ai/src/providers/openai-compatible.ts

@@ -12,6 +12,7 @@ type GenericModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
   ProviderAuthOption<"optional"> & {
     readonly provider?: string
     readonly baseURL: string
+    readonly queryParams?: Readonly<Record<string, string>>
     readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
@@ -19,6 +20,8 @@ export interface Settings extends ProviderPackage.Settings {
   readonly apiKey?: string
   readonly baseURL: string
   readonly provider?: string
+  readonly providerOptions?: OpenAIProviderOptionsInput
+  readonly queryParams?: Readonly<Record<string, string>>
 }
 
 export type FamilyModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
@@ -31,11 +34,11 @@ export const routes = [OpenAICompatibleChat.route]
 
 export const configure = (input: GenericModelOptions) => {
   const provider = input.provider ?? "openai-compatible"
-  const { provider: _, baseURL, apiKey: _apiKey, auth: _auth, ...rest } = input
+  const { provider: _, baseURL, apiKey: _apiKey, auth: _auth, queryParams, ...rest } = input
   const route = OpenAICompatibleChat.route.with({
     ...rest,
     provider,
-    endpoint: { baseURL },
+    endpoint: { baseURL, query: queryParams },
     auth: AuthOptions.bearer(input, []),
   })
   return {
@@ -75,6 +78,8 @@ export const model: ProviderPackage.Definition<Settings, OpenAIProviderOptionsIn
     http: settings.body === undefined ? undefined : { body: { ...settings.body } },
     limits: settings.limits,
     provider: settings.provider,
+    providerOptions: settings.providerOptions,
+    queryParams: settings.queryParams === undefined ? undefined : { ...settings.queryParams },
   }).model(modelID)
 
 export const baseten = define(profiles.baseten)

packages/ai/test/provider-package.test.ts

@@ -64,6 +64,24 @@ describe("provider package entrypoints", () => {
     expect(xai.route.defaults.providerOptions).toMatchObject({ xai: { reasoningEffort: "high", store: false } })
   })
 
+  test("maps OpenAI-compatible package settings onto the executable model", async () => {
+    const OpenAICompatible = await import("@opencode-ai/ai/providers/openai-compatible")
+    const selected = OpenAICompatible.model("custom-model", {
+      apiKey: "fixture",
+      baseURL: "https://provider.example.test/v1",
+      provider: "example",
+      queryParams: { version: "preview" },
+      providerOptions: { openai: { reasoningEffort: "high" } },
+    })
+
+    expect(String(selected.provider)).toBe("example")
+    expect(selected.route.endpoint).toMatchObject({
+      baseURL: "https://provider.example.test/v1",
+      query: { version: "preview" },
+    })
+    expect(selected.route.defaults.providerOptions).toEqual({ openai: { reasoningEffort: "high" } })
+  })
+
   test("maps package settings onto the executable model", () => {
     const selected = model("gpt-5", {
       apiKey: "fixture",

packages/client/src/promise/generated/types.ts

@@ -1937,23 +1937,9 @@ export type IntegrationInfo = {
   connections: Array<ConnectionInfo>
 }
 
-export type FormInfo = {
-  id: string
-  sessionID: string
-  title: string
-  coalesce?: string
-  metadata?: FormMetadata
-  fields: FormFields
-}
+export type FormInfo = { id: string; sessionID: string; title: string; metadata?: FormMetadata; fields: FormFields }
 
-export type FormInfo1 = {
-  id: string
-  sessionID: string
-  title: string
-  coalesce?: string
-  metadata?: FormMetadata1
-  fields: FormFields1
-}
+export type FormInfo1 = { id: string; sessionID: string; title: string; metadata?: FormMetadata1; fields: FormFields1 }
 
 export type SessionInputAdmitted = {
   id: string

packages/core/src/aisdk-native.ts

@@ -12,6 +12,7 @@ export interface Mapping {
 
 export interface MapInput {
   readonly packageName: string | undefined
+  readonly providerID: string
   readonly settings: Readonly<Record<string, unknown>>
   readonly modelID: string
 }
@@ -51,6 +52,8 @@ export function map(input: MapInput): Mapping | undefined {
           ...mapGoogleOptions(input.settings),
         },
       }
+    case "@ai-sdk/openai-compatible":
+      return mapOpenAICompatible(input, baseSettings)
     case "@openrouter/ai-sdk-provider":
       return mapOpenRouter(input.settings, baseSettings)
     case "@ai-sdk/xai":
@@ -63,6 +66,33 @@ export function map(input: MapInput): Mapping | undefined {
         },
       }
   }
+  return undefined
+}
+
+function mapOpenAICompatible(
+  input: MapInput,
+  baseSettings: Readonly<Record<string, unknown>>,
+): Mapping | undefined {
+  const accountId =
+    input.providerID === "cloudflare-workers-ai" && typeof input.settings.accountId === "string"
+      ? input.settings.accountId
+      : undefined
+  const baseURL =
+    typeof baseSettings.baseURL === "string" && accountId
+      ? baseSettings.baseURL.replaceAll("${CLOUDFLARE_ACCOUNT_ID}", encodeURIComponent(accountId))
+      : baseSettings.baseURL
+  if (typeof baseURL !== "string") return undefined
+  return {
+    package: "@opencode-ai/ai/providers/openai-compatible",
+    settings: {
+      baseURL,
+      ...mapAPIKey(input.settings),
+      provider: input.providerID,
+      ...(isStringRecord(input.settings.queryParams) ? { queryParams: input.settings.queryParams } : {}),
+      ...mapOpenAIOptions(input.settings),
+    },
+    ...(isStringRecord(input.settings.headers) ? { headers: input.settings.headers } : {}),
+  }
 }
 
 function mapBedrockMantle(input: MapInput, baseSettings: Readonly<Record<string, unknown>>): Mapping | undefined {

packages/core/src/config.ts

@@ -233,13 +233,13 @@ export const layer = (options?: Options) => Layer.effect(
 
       const supplementary = yield* Effect.forEach(directories, loadDirectory).pipe(Effect.orDie)
       return [
+        ...(yield* loadWellknown().pipe(Effect.orDie)),
         ...claude,
         ...agents,
         ...(supplementary[0] ?? []),
         ...explicit,
         ...direct,
         ...supplementary.slice(1).flat(),
-        ...(yield* loadWellknown().pipe(Effect.orDie)),
         ...content,
       ]
     })

packages/core/src/form.ts

@@ -132,7 +132,6 @@ export const layer = Layer.effect(
             id,
             sessionID: input.sessionID,
             title: input.title,
-            ...(input.coalesce === undefined ? {} : { coalesce: input.coalesce }),
             ...(input.metadata === undefined ? {} : { metadata: input.metadata }),
             fields: input.fields,
           }

packages/core/src/model-resolver.ts

@@ -5,8 +5,6 @@ import { LanguageModel } from "@opencode-ai/ai"
 // ast-grep-ignore: no-star-import
 import * as AnthropicMessages from "@opencode-ai/ai/protocols/anthropic-messages"
 // ast-grep-ignore: no-star-import
-import * as OpenAICompatibleChat from "@opencode-ai/ai/protocols/openai-compatible-chat"
-// ast-grep-ignore: no-star-import
 import * as OpenAIResponses from "@opencode-ai/ai/protocols/openai-responses"
 import { Auth, type AnyRoute } from "@opencode-ai/ai/route"
 import { Context, Effect, Layer, Schema } from "effect"
@@ -146,6 +144,7 @@ export const fromCatalogModel = (
     if (draft.settings?.apiKey === "") delete draft.settings.apiKey
     if (credential?.type === "key" && credential.metadata !== undefined)
       draft.body = Provider.mergeOverlay(draft.body, credential.metadata)
+    if (draft.providerID === "cloudflare-workers-ai" && draft.body) delete draft.body.accountId
   })
   const packageName = Provider.packageName(resolved.package)
   const key = apiKey(resolved, credential)
@@ -164,21 +163,11 @@ export const fromCatalogModel = (
         .model({ id: resolved.modelID ?? resolved.id, compatibility: resolved.compatibility }),
     )
   }
-  if (
-    Provider.isAISDK(resolved.package) &&
-    packageName === "@ai-sdk/openai-compatible" &&
-    typeof resolved.settings?.baseURL === "string"
-  ) {
-    return Effect.succeed(
-      withDefaults(resolved, OpenAICompatibleChat.route)
-        .with({ auth: key === undefined ? Auth.none : Auth.bearer(key) })
-        .model({ id: resolved.modelID ?? resolved.id, compatibility: resolved.compatibility }),
-    )
-  }
   const configured = { ...resolved.settings, ...credential?.metadata }
   const mapping = Provider.isAISDK(resolved.package)
     ? AISDKNative.map({
         packageName,
+        providerID: resolved.providerID,
         settings: configured,
         modelID: resolved.modelID ?? resolved.id,
       })

packages/core/src/plugin/promise.ts

@@ -2,7 +2,6 @@ export * as PluginPromise from "./promise"
 
 import { define } from "@opencode-ai/plugin/effect/plugin"
 import type { Context, Plugin } from "@opencode-ai/plugin/promise/plugin"
-import type { SessionHooks, SessionHttp, SessionHttpMiddleware } from "@opencode-ai/plugin/promise/session"
 import type { Info } from "@opencode-ai/plugin/promise/tool"
 import { Agent } from "@opencode-ai/schema/agent"
 import { Integration } from "@opencode-ai/schema/integration"
@@ -58,62 +57,6 @@ export function fromPromise(plugin: Plugin) {
               }),
             )
 
-        function sessionHook<Name extends keyof SessionHooks>(
-          name: Name,
-          callback: (event: SessionHooks[Name]) => Promise<void> | void,
-        ): Promise<Registration>
-        function sessionHook(
-          ...registration: {
-            [Name in keyof SessionHooks]: [
-              name: Name,
-              callback: (event: SessionHooks[Name]) => Promise<void> | void,
-            ]
-          }[keyof SessionHooks]
-        ) {
-          if (registration[0] !== "http")
-            return register(
-              host.session.hook(registration[0], (event) =>
-                Effect.promise(() => Promise.resolve(registration[1](event))),
-              ),
-            )
-          return register(
-            host.session.hook("http", (event) => {
-              const middlewares: SessionHttpMiddleware[] = []
-              const output: SessionHttp = {
-                ...event,
-                use: (item) => {
-                  middlewares.push(item)
-                },
-              }
-              return Effect.promise(() => Promise.resolve(registration[1](output))).pipe(
-                Effect.flatMap(() =>
-                  Effect.forEach(
-                    middlewares,
-                    (item) =>
-                      event.use((input, next) =>
-                        Effect.tryPromise({
-                          try: (signal) => {
-                            const inputSignal = AbortSignal.any([signal, input.signal])
-                            return Promise.resolve(
-                              item(new Request(input, { signal: inputSignal }), (request) => {
-                                const requestSignal = AbortSignal.any([signal, request.signal])
-                                return Effect.runPromiseWith(
-                                  context,
-                                )(next(new Request(request, { signal: requestSignal })), { signal: requestSignal })
-                              }),
-                            )
-                          },
-                          catch: (cause) => (cause instanceof Error ? cause : new Error(String(cause))),
-                        }),
-                      ),
-                    { discard: true },
-                  ),
-                ),
-              )
-            }),
-          )
-        }
-
         const context2: Context = {
           app: host.app,
           options: host.options,
@@ -322,7 +265,8 @@ export function fromPromise(plugin: Plugin) {
               ),
           },
           session: {
-            hook: sessionHook,
+            hook: (name, callback) =>
+              register(host.session.hook(name, (event) => Effect.promise(() => Promise.resolve(callback(event))))),
             create: (input) =>
               run(
                 host.session.create(

packages/core/src/plugin/provider/cloudflare-workers-ai.ts

@@ -14,38 +14,20 @@ export const CloudflareWorkersAIPlugin = define({
       if (!item) return
       evt.provider.update(item.provider.id, (provider) => {
         if (!Provider.isAISDK(provider.package)) return
-        if (typeof provider.settings?.baseURL === "string") return
         const accountId = resolveAccountId(provider.settings ?? {})
-        if (accountId) provider.settings = { ...provider.settings, baseURL: workersEndpoint(accountId) }
+        if (accountId)
+          provider.settings = {
+            ...provider.settings,
+            baseURL:
+              typeof provider.settings?.baseURL === "string"
+                ? provider.settings.baseURL.replaceAll("${CLOUDFLARE_ACCOUNT_ID}", encodeURIComponent(accountId))
+                : workersEndpoint(accountId),
+          }
+        provider.headers = Provider.mergeHeaders(provider.headers, {
+          "User-Agent": `${App.useragent(ctx.app)} cloudflare-workers-ai (${os.platform()} ${os.release()}; ${os.arch()})`,
+        })
       })
     })
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.model.providerID !== providerID) return
-        if (evt.package !== "@ai-sdk/openai-compatible") return
-
-        const accountId = resolveAccountId(evt.options)
-        if (!hasWorkersEndpoint(evt.model) && !accountId) return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/openai-compatible"))
-        evt.sdk = mod.createOpenAICompatible(
-          sdkOptions(
-            {
-              ...evt.options,
-              baseURL: evt.options.baseURL ?? (accountId ? workersEndpoint(accountId) : undefined),
-            },
-            ctx.app,
-          ) as any,
-        )
-      }),
-    )
-    yield* ctx.aisdk.hook(
-      "language",
-      Effect.fn(function* (evt) {
-        if (evt.model.providerID !== providerID) return
-        evt.language = evt.sdk.languageModel(evt.model.modelID ?? evt.model.id)
-      }),
-    )
   }),
 })
 
@@ -54,32 +36,7 @@ function resolveAccountId(options: Record<string, unknown>) {
 }
 
 function workersEndpoint(accountId: string) {
-  return `https://api.cloudflare.com/client/v4/accounts/${accountId}/ai/v1`
-}
-
-function hasWorkersEndpoint(model: {
-  readonly package?: string
-  readonly settings?: Readonly<Record<string, unknown>>
-}) {
-  return Provider.isAISDK(model.package) && typeof model.settings?.baseURL === "string"
-}
-
-function sdkOptions(options: Record<string, any>, app: App.Info) {
-  return {
-    ...options,
-    baseURL: expandAccountId(options.baseURL),
-    apiKey: process.env.CLOUDFLARE_API_KEY ?? options.apiKey,
-    headers: {
-      "User-Agent": `${App.useragent(app)} cloudflare-workers-ai (${os.platform()} ${os.release()}; ${os.arch()})`,
-      ...options.headers,
-    },
-    name: providerID,
-  }
-}
-
-function expandAccountId(baseURL: unknown) {
-  if (typeof baseURL !== "string") return baseURL
-  return baseURL.replaceAll("${CLOUDFLARE_ACCOUNT_ID}", process.env.CLOUDFLARE_ACCOUNT_ID ?? "${CLOUDFLARE_ACCOUNT_ID}")
+  return `https://api.cloudflare.com/client/v4/accounts/${encodeURIComponent(accountId)}/ai/v1`
 }
 
 function stringOption(options: Record<string, unknown>, key: string) {

packages/core/src/plugin/provider/openai.ts

@@ -221,18 +221,18 @@ export const OpenAIPlugin = define({
           }
           draft.cost = []
           // Match Codex CLI so context consumption and subscription usage stay consistent between clients.
-          draft.limit = { ...draft.limit, context: 272_000, input: 272_000 }
+          draft.limit = { ...draft.limit, context: 400_000, input: 272_000 }
         })
       }
     })
-    yield* ctx.session.hook("http", (evt) =>
-      evt.use((request, next) => {
-        if (!chatgpt || evt.model.providerID !== Provider.ID.openai) return next(request)
-        const url = new URL(request.url)
-        request.headers.set("originator", "opencode")
-        request.headers.set("session-id", evt.sessionID)
-        if (url.origin !== "https://api.openai.com") return next(request)
-        return next(new Request(`${codexBaseURL}${url.pathname.replace(/^\/v1/, "")}${url.search}`, request))
+    yield* ctx.session.hook("http.request", (evt) =>
+      Effect.sync(() => {
+        if (!chatgpt || evt.model.providerID !== Provider.ID.openai) return
+        const url = new URL(evt.request.url)
+        evt.request.headers.set("originator", "opencode")
+        evt.request.headers.set("session-id", evt.sessionID)
+        if (url.origin !== "https://api.openai.com") return
+        evt.request = new Request(`${codexBaseURL}${url.pathname.replace(/^\/v1/, "")}${url.search}`, evt.request)
       }),
     )
 

packages/core/src/session/model-request.ts

@@ -2,7 +2,6 @@ export * as SessionModelRequest from "./model-request"
 
 import { LLM, Message, SystemPart, type LLMRequest } from "@opencode-ai/ai"
 import type { StreamOptions } from "@opencode-ai/ai/route"
-import type { SessionHttpHandler, SessionHttpMiddleware } from "@opencode-ai/plugin/effect/session"
 import type { Content } from "@opencode-ai/schema/tool"
 import { SessionError } from "@opencode-ai/schema/session-error"
 import { Cause, Config, Context, Effect, Layer, Result, Stream } from "effect"
@@ -230,44 +229,31 @@ export const layer = Layer.effect(
       const options: StreamOptions = {
         http: (request, handler) =>
           Effect.gen(function* () {
-            let latest = request
-            const origins = new WeakMap<Response, HttpClientRequest.HttpClientRequest>()
-            const middlewares: SessionHttpMiddleware[] = []
-            const web = yield* HttpClientRequest.toWeb(request)
-            yield* hooks.trigger("session", "http", {
+            const before = yield* hooks.trigger("session", "http.request", {
               sessionID: session.id,
               agent: agent.id,
               model: resolved.ref,
-              use: (item) =>
-                Effect.sync(() => {
-                  middlewares.push(item)
-                }),
+              request: yield* HttpClientRequest.toWeb(request),
             })
-            const send = (input: Request) =>
-              Effect.gen(function* () {
-                let sent = HttpClientRequest.fromWeb(input)
-                if (input.body)
-                  sent = HttpClientRequest.bodyUint8Array(
-                    sent,
-                    new Uint8Array(yield* Effect.promise(() => input.clone().arrayBuffer())),
-                    input.headers.get("content-type") ?? undefined,
-                  )
-                latest = sent
-                const response = yield* handler(sent)
-                const body = [204, 205, 304].includes(response.status)
-                  ? null
-                  : yield* Stream.toReadableStreamEffect(response.stream)
-                const output = new Response(body, { status: response.status, headers: response.headers })
-                origins.set(output, sent)
-                return output
-              })
-            const dispatch = middlewares.reduce<SessionHttpHandler>(
-              (next, item) => (input: Request) => item(input, next),
-              send,
-            )
-            const response = yield* dispatch(web)
-            const origin = origins.get(response) ?? latest
-            return HttpClientResponse.fromWeb(origin, response)
+            let sent = HttpClientRequest.fromWeb(before.request)
+            if (before.request.body)
+              sent = HttpClientRequest.bodyUint8Array(
+                sent,
+                new Uint8Array(yield* Effect.promise(() => before.request.clone().arrayBuffer())),
+                before.request.headers.get("content-type") ?? undefined,
+              )
+            const response = yield* handler(sent)
+            const after = yield* hooks.trigger("session", "http.response", {
+              sessionID: session.id,
+              agent: agent.id,
+              model: resolved.ref,
+              request: before.request,
+              response: new Response(
+                [204, 205, 304].includes(response.status) ? null : yield* Stream.toReadableStreamEffect(response.stream),
+                { status: response.status, headers: response.headers },
+              ),
+            })
+            return HttpClientResponse.fromWeb(sent, after.response)
           }).pipe(Effect.mapError((cause) => (cause instanceof Error ? cause : new Error(String(cause))))),
       }
       if (promptCacheSnapshots) {

packages/core/src/tool/plugin/websearch.ts

@@ -59,7 +59,6 @@ export const Plugin = {
                     const response = yield* forms.ask({
                       sessionID: context.sessionID,
                       title: "Web Search",
-                      coalesce: `${context.messageID}:websearch-consent`,
                       metadata: { kind: "websearch.provider" },
                       fields: [
                         {
@@ -92,7 +91,6 @@ export const Plugin = {
                         ? yield* forms.ask({
                             sessionID: context.sessionID,
                             title: "Choose a web search provider",
-                            coalesce: `${context.messageID}:websearch-provider`,
                             metadata: { kind: "websearch.provider" },
                             fields: [
                               {

packages/core/test/aisdk-native.test.ts

@@ -1,8 +1,12 @@
 import { describe, expect, test } from "bun:test"
 import { AISDKNative } from "@opencode-ai/core/aisdk-native"
 
-const map = (packageName: string, settings: Readonly<Record<string, unknown>>, modelID = "test-model") =>
-  AISDKNative.map({ packageName, settings, modelID })
+const map = (
+  packageName: string,
+  settings: Readonly<Record<string, unknown>>,
+  modelID = "test-model",
+  providerID = "test-provider",
+) => AISDKNative.map({ packageName, providerID, settings, modelID })
 
 describe("AISDKNative", () => {
   test("maps both models.dev Bedrock packages to native providers", () => {
@@ -41,6 +45,52 @@ describe("AISDKNative", () => {
     )
   })
 
+  test("maps Cloudflare Workers AI to the generic OpenAI-compatible provider", () => {
+    expect(
+      map(
+        "@ai-sdk/openai-compatible",
+        {
+          accountId: "account/id",
+          apiKey: "secret",
+          baseURL: "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/ai/v1",
+          headers: { "x-custom": "value" },
+          queryParams: { version: "preview" },
+          reasoningEffort: "high",
+        },
+        "@cf/model",
+        "cloudflare-workers-ai",
+      ),
+    ).toEqual({
+      package: "@opencode-ai/ai/providers/openai-compatible",
+      settings: {
+        apiKey: "secret",
+        baseURL: "https://api.cloudflare.com/client/v4/accounts/account%2Fid/ai/v1",
+        provider: "cloudflare-workers-ai",
+        queryParams: { version: "preview" },
+        providerOptions: { openai: { reasoningEffort: "high" } },
+      },
+      headers: { "x-custom": "value" },
+    })
+  })
+
+  test("maps generic OpenAI-compatible providers to the native package", () => {
+    expect(
+      map("@ai-sdk/openai-compatible", {
+        apiKey: "secret",
+        baseURL: "https://provider.example/v1",
+        reasoningEffort: "high",
+      }),
+    ).toEqual({
+      package: "@opencode-ai/ai/providers/openai-compatible",
+      settings: {
+        apiKey: "secret",
+        baseURL: "https://provider.example/v1",
+        provider: "test-provider",
+        providerOptions: { openai: { reasoningEffort: "high" } },
+      },
+    })
+  })
+
   test("maps Bedrock provider and request options", () => {
     expect(
       map(

packages/core/test/form.test.ts

@@ -15,7 +15,6 @@ const input = {
   id: formID,
   sessionID: SessionSchema.ID.make("ses_test"),
   title: "Test form",
-  coalesce: "test-form",
   fields: [{ key: "name", type: "string", required: true }],
 } satisfies Form.CreateInput
 
@@ -33,7 +32,6 @@ describe("Form", () => {
       yield* Effect.addFinalizer(() => unsubscribe)
       const fiber = yield* service.ask(input).pipe(Effect.forkScoped)
       const form = yield* Deferred.await(created)
-      expect(form.coalesce).toBe("test-form")
 
       yield* service.cancel(form.id)
 

packages/core/test/model-resolver.test.ts

@@ -131,6 +131,45 @@ describe("ModelResolver", () => {
     }),
   )
 
+  it.effect("routes Cloudflare Workers AI through the generic OpenAI-compatible provider", () =>
+    Effect.gen(function* () {
+      const resolved = yield* ModelResolver.fromCatalogModel(
+        model(Provider.aisdk("@ai-sdk/openai-compatible"), {
+          providerID: Provider.ID.make("cloudflare-workers-ai"),
+          modelID: "@cf/meta/llama-3.1-8b-instruct",
+          settings: {
+            baseURL: "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/ai/v1",
+            queryParams: { version: "preview" },
+            reasoningEffort: "high",
+          },
+        }),
+        Credential.Key.make({ type: "key", key: "secret", metadata: { accountId: "account/id" } }),
+        { loadAISDK: () => Effect.die("AI SDK loader should not be called") },
+      )
+      const headers = yield* resolved.route.auth.apply({
+        request: LLM.request({ model: resolved, prompt: "Hello" }),
+        method: "POST",
+        url: "https://example.com",
+        body: "{}",
+        headers: Headers.empty,
+      })
+
+      expect(resolved.route.id).toBe("openai-compatible-chat")
+      expect(String(resolved.provider)).toBe("cloudflare-workers-ai")
+      expect(resolved.route.endpoint.baseURL).toBe("https://api.cloudflare.com/client/v4/accounts/account%2Fid/ai/v1")
+      expect(resolved.route.endpoint.query).toEqual({ version: "preview" })
+      expect(resolved.route.defaults.providerOptions).toEqual({ openai: { reasoningEffort: "high" } })
+      expect(resolved.route.defaults.http?.body).toEqual({ custom_extension: { enabled: true } })
+      const prepared = yield* compileRequest(LLM.request({ model: resolved, prompt: "Hello" }))
+      expect(prepared.body).toMatchObject({
+        reasoning_effort: "high",
+        stream_options: { include_usage: true },
+      })
+      expect(prepared.body).not.toHaveProperty("accountId")
+      expect(headers.authorization).toBe("Bearer secret")
+    }),
+  )
+
   it.effect("uses the API modelID instead of the catalog ID for native OpenAI routes", () =>
     Effect.gen(function* () {
       const catalog = model(Provider.aisdk("@ai-sdk/openai"), {
@@ -151,6 +190,9 @@ describe("ModelResolver", () => {
           http: { body: { custom_extension: { enabled: true } } },
         },
       })
+      const prepared = yield* compileRequest(LLM.request({ model: resolved, prompt: "Hello" }))
+      expect(prepared.body.max_output_tokens).toBeUndefined()
+      expect(JSON.stringify(prepared.body)).not.toContain("max_output_tokens")
     }),
   )
 

packages/core/test/plugin/promise.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect } from "bun:test"
 import { Message, SystemPart } from "@opencode-ai/ai"
-import { DateTime, Deferred, Effect, Fiber, Schema } from "effect"
+import { DateTime, Effect, Schema } from "effect"
 import { Agent } from "@opencode-ai/core/agent"
 import { Catalog } from "@opencode-ai/core/catalog"
 import { Model } from "@opencode-ai/core/model"
@@ -15,7 +15,7 @@ import { SessionPending } from "@opencode-ai/core/session/pending"
 import { Tool } from "@opencode-ai/core/tool"
 import { Provider } from "@opencode-ai/core/provider"
 import { define } from "@opencode-ai/plugin/promise/plugin"
-import type { SessionHooks, SessionHttpHandler } from "@opencode-ai/plugin/effect/session"
+import type { SessionHooks } from "@opencode-ai/plugin/effect/session"
 import { testEffect } from "../lib/effect"
 import { PluginTestLayer } from "./fixture"
 import { host as testHost } from "./host"
@@ -223,102 +223,45 @@ describe("fromPromise", () => {
     }),
   )
 
-  it.effect("adapts promise session HTTP hooks", () =>
+  it.effect("adapts promise session HTTP request and response hooks", () =>
     Effect.gen(function* () {
       const plugin = yield* Plugin.Service
       const hooks = yield* PluginHooks.Service
       const host = yield* PluginHost.make(plugin)
-      const bodies: string[] = []
       yield* PluginPromise.fromPromise(
         define({
           id: "promise-session-http",
           setup: async (ctx) => {
-            await ctx.session.hook("http", (event) => {
-              event.use(async (request, next) => {
-                request.headers.set("x-hook", "promise")
-                await next(request)
-                const response = await next(request)
-                return new Response(`${await response.text()}-response`)
-              })
+            await ctx.session.hook("http.request", (event) => {
+              event.request = new Request("https://provider.test/changed", event.request)
+              event.request.headers.set("x-hook", "promise")
             })
-            await ctx.session.hook("http", (event) => {
-              event.use(async (request, next) => {
-                const response = await next(request)
-                return new Response(`${await response.text()}-outer`)
+            await ctx.session.hook("http.response", async (event) => {
+              event.response = new Response(`${await event.response.text()}-response`, {
+                status: event.response.status,
               })
             })
           },
         }),
       ).effect(host)
-      const middlewares: Parameters<PluginHooks.Domains["session"]["http"]["use"]>[0][] = []
-      const event: PluginHooks.Domains["session"]["http"] = {
+      const context = {
         sessionID: Session.ID.make("ses_promise_session_http"),
         agent: Agent.ID.make("build"),
         model: Model.Ref.make({ providerID: Provider.ID.make("test"), id: Model.ID.make("model") }),
-        use: (item) =>
-          Effect.sync(() => {
-            middlewares.push(item)
-          }),
       }
 
-      yield* hooks.trigger("session", "http", event)
-      const request = middlewares.reduce<SessionHttpHandler>(
-        (next, item) => (input: Request) => item(input, next),
-        (input: Request) =>
-          Effect.promise(() => input.text()).pipe(
-            Effect.tap((body) => Effect.sync(() => bodies.push(body))),
-            Effect.as(new Response(input.headers.get("x-hook") ?? "missing")),
-          ),
-      )
-      const response = yield* request(new Request("https://provider.test", { method: "POST", body: "payload" }))
+      const request = yield* hooks.trigger("session", "http.request", {
+        ...context,
+        request: new Request("https://provider.test", { method: "POST", body: "payload" }),
+      })
+      const response = yield* hooks.trigger("session", "http.response", {
+        ...context,
+        request: request.request,
+        response: new Response(request.request.headers.get("x-hook") ?? "missing"),
+      })
 
-      expect(bodies).toEqual(["payload", "payload"])
-      expect(yield* Effect.promise(() => response.text())).toBe("promise-response-outer")
-    }),
-  )
-
-  it.effect("interrupts the Effect request through a promise session HTTP hook", () =>
-    Effect.gen(function* () {
-      const plugin = yield* Plugin.Service
-      const hooks = yield* PluginHooks.Service
-      const host = yield* PluginHost.make(plugin)
-      yield* PluginPromise.fromPromise(
-        define({
-          id: "promise-session-http-interrupt",
-          setup: async (ctx) => {
-            await ctx.session.hook("http", (event) => {
-              event.use((request, next) => next(request))
-            })
-          },
-        }),
-      ).effect(host)
-      const started = yield* Deferred.make<void>()
-      const interrupted = yield* Deferred.make<void>()
-      const middlewares: Parameters<PluginHooks.Domains["session"]["http"]["use"]>[0][] = []
-      const event: PluginHooks.Domains["session"]["http"] = {
-        sessionID: Session.ID.make("ses_promise_session_http_interrupt"),
-        agent: Agent.ID.make("build"),
-        model: Model.Ref.make({ providerID: Provider.ID.make("test"), id: Model.ID.make("model") }),
-        use: (item) =>
-          Effect.sync(() => {
-            middlewares.push(item)
-          }),
-      }
-
-      yield* hooks.trigger("session", "http", event)
-      const request = middlewares.reduce<SessionHttpHandler>(
-        (next, item) => (input: Request) => item(input, next),
-        () =>
-          Deferred.succeed(started, undefined).pipe(
-            Effect.andThen(Effect.never),
-            Effect.onInterrupt(() => Deferred.succeed(interrupted, undefined)),
-          ),
-      )
-      const fiber = yield* request(new Request("https://provider.test")).pipe(Effect.forkChild)
-      yield* Deferred.await(started)
-      yield* Fiber.interrupt(fiber)
-
-      expect(yield* Deferred.isDone(interrupted)).toBeTrue()
+      expect(request.request.url).toBe("https://provider.test/changed")
+      expect(yield* Effect.promise(() => response.response.text())).toBe("promise-response")
     }),
   )
 

packages/core/test/plugin/provider-cloudflare-workers-ai.test.ts

@@ -1,13 +1,10 @@
-import { AISDK } from "@opencode-ai/core/aisdk"
-import { describe, expect } from "bun:test"
-import { Effect } from "effect"
 import { Catalog } from "@opencode-ai/core/catalog"
-import { Model } from "@opencode-ai/core/model"
 import { Plugin } from "@opencode-ai/core/plugin"
 import { PluginHost } from "@opencode-ai/core/plugin/host"
 import { CloudflareWorkersAIPlugin } from "@opencode-ai/core/plugin/provider/cloudflare-workers-ai"
 import { Provider } from "@opencode-ai/core/provider"
-import type { LanguageModelV3 } from "@ai-sdk/provider"
+import { describe, expect } from "bun:test"
+import { Effect } from "effect"
 import { testEffect } from "../lib/effect"
 import { PluginTestLayer } from "./fixture"
 
@@ -15,9 +12,7 @@ const it = testEffect(PluginTestLayer)
 
 const addPlugin = Effect.fn(function* () {
   const plugin = yield* Plugin.Service
-  const aisdk = yield* AISDK.Service
-  const host = yield* PluginHost.make(plugin)
-  yield* CloudflareWorkersAIPlugin.effect(host)
+  yield* CloudflareWorkersAIPlugin.effect(yield* PluginHost.make(plugin))
 })
 
 function required<T>(value: T | undefined): T {
@@ -25,243 +20,96 @@ function required<T>(value: T | undefined): T {
   return value
 }
 
-function withEnv<A, E, R>(vars: Record<string, string | undefined>, effect: () => Effect.Effect<A, E, R>) {
+function withEnv<A, E, R>(value: string | undefined, effect: () => Effect.Effect<A, E, R>) {
   return Effect.acquireUseRelease(
     Effect.sync(() => {
-      const previous = Object.fromEntries(Object.keys(vars).map((key) => [key, process.env[key]]))
-      Object.entries(vars).forEach(([key, value]) => {
-        if (value === undefined) delete process.env[key]
-        else process.env[key] = value
-      })
+      const previous = process.env.CLOUDFLARE_ACCOUNT_ID
+      if (value === undefined) delete process.env.CLOUDFLARE_ACCOUNT_ID
+      else process.env.CLOUDFLARE_ACCOUNT_ID = value
       return previous
     }),
     effect,
     (previous) =>
-      Effect.sync(() =>
-        Object.entries(previous).forEach(([key, value]) => {
-          if (value === undefined) delete process.env[key]
-          else process.env[key] = value
-        }),
-      ),
+      Effect.sync(() => {
+        if (previous === undefined) delete process.env.CLOUDFLARE_ACCOUNT_ID
+        else process.env.CLOUDFLARE_ACCOUNT_ID = previous
+      }),
   )
 }
 
-function fakeSelectorSdk(calls: string[]) {
-  const make = (method: string) => (id: string) => {
-    calls.push(`${method}:${id}`)
-    return { modelId: id, provider: method, specificationVersion: "v3" } as unknown as LanguageModelV3
-  }
-  return {
-    responses: make("responses"),
-    messages: make("messages"),
-    chat: make("chat"),
-    languageModel: make("languageModel"),
-  }
-}
-
-function cloudflareLanguage(sdk: unknown, modelID = "@cf/model") {
-  return (sdk as { languageModel: (id: string) => { config: CloudflareConfig; provider: string } }).languageModel(
-    modelID,
-  )
-}
-
-type CloudflareConfig = {
-  url: (input: { path: string; modelId: string }) => string
-  headers: () => Record<string, string> | Promise<Record<string, string>>
-}
-
-function cloudflareURL(sdk: unknown, modelID = "@cf/model") {
-  return cloudflareLanguage(sdk, modelID).config.url({ path: "/chat/completions", modelId: modelID })
-}
-
-function cloudflareHeaders(sdk: unknown, modelID = "@cf/model") {
-  return cloudflareLanguage(sdk, modelID).config.headers()
-}
+const providerID = Provider.ID.make("cloudflare-workers-ai")
 
 describe("CloudflareWorkersAIPlugin", () => {
-  it.effect("maps account ID to endpoint URL and creates an OpenAI-compatible SDK", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: "acct", CLOUDFLARE_API_KEY: "key" }, () =>
-      Effect.gen(function* () {
-        const plugin = yield* Plugin.Service
-        const aisdk = yield* AISDK.Service
-        const catalog = yield* Catalog.Service
-        yield* catalog.transform((catalog) =>
-          catalog.provider.update(Provider.ID.make("cloudflare-workers-ai"), (provider) => {
-            provider.package = Provider.aisdk("test-provider")
-          }),
-        )
-        yield* addPlugin()
-        const provider = required(yield* catalog.provider.get(Provider.ID.make("cloudflare-workers-ai")))
-        const sdk = yield* aisdk.runSDK({
-          model: Model.Info.make({
-            ...Model.Info.default(Provider.ID.make("cloudflare-workers-ai"), Model.ID.make("@cf/model")),
-            modelID: Model.ID.make("@cf/model"),
-            package: provider.package,
-            settings: provider.settings,
-          }),
-          package: "@ai-sdk/openai-compatible",
-          options: { name: "cloudflare-workers-ai", headers: { custom: "header" } },
-        })
-        expect(provider).toMatchObject({
-          package: "aisdk:test-provider",
-          settings: { baseURL: "https://api.cloudflare.com/client/v4/accounts/acct/ai/v1" },
-        })
-        expect(sdk.sdk).toBeDefined()
-      }),
-    ),
-  )
-
-  it.effect("preserves a configured endpoint URL instead of deriving one from account ID", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: "acct" }, () =>
+  it.effect("resolves the account environment variable into the native endpoint", () =>
+    withEnv("account/id", () =>
       Effect.gen(function* () {
         const catalog = yield* Catalog.Service
-        yield* catalog.transform((catalog) =>
-          catalog.provider.update(Provider.ID.make("cloudflare-workers-ai"), (provider) => {
-            provider.package = Provider.aisdk("test-provider")
-            provider.settings = { ...provider.settings, baseURL: "https://proxy.example/v1" }
+        yield* catalog.transform((draft) =>
+          draft.provider.update(providerID, (provider) => {
+            provider.package = Provider.aisdk("@ai-sdk/openai-compatible")
           }),
         )
         yield* addPlugin()
-        expect(required(yield* catalog.provider.get(Provider.ID.make("cloudflare-workers-ai")))).toMatchObject({
-          package: "aisdk:test-provider",
-          settings: { baseURL: "https://proxy.example/v1" },
+
+        expect(required(yield* catalog.provider.get(providerID))).toMatchObject({
+          settings: { baseURL: "https://api.cloudflare.com/client/v4/accounts/account%2Fid/ai/v1" },
+          headers: { "User-Agent": expect.stringContaining("cloudflare-workers-ai") },
         })
       }),
     ),
   )
 
-  it.effect("allows a configured baseURL without account ID", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: undefined, CLOUDFLARE_API_KEY: "key" }, () =>
-      Effect.gen(function* () {
-        const plugin = yield* Plugin.Service
-        const aisdk = yield* AISDK.Service
-        yield* addPlugin()
-        const result = yield* aisdk.runSDK({
-          model: Model.Info.make({
-            ...Model.Info.default(Provider.ID.make("cloudflare-workers-ai"), Model.ID.make("@cf/model")),
-            modelID: Model.ID.make("@cf/model"),
-            package: "aisdk:@ai-sdk/openai-compatible",
-            settings: { baseURL: "https://proxy.example/v1" },
-          }),
-          package: "@ai-sdk/openai-compatible",
-          options: { name: "cloudflare-workers-ai", baseURL: "https://proxy.example/v1" },
-        })
-        expect(cloudflareURL(result.sdk)).toBe("https://proxy.example/v1/chat/completions")
-      }),
-    ),
-  )
-
-  it.effect("uses env account ID over configured account ID", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: "env-acct" }, () =>
+  it.effect("resolves an account ID from provider settings", () =>
+    withEnv(undefined, () =>
       Effect.gen(function* () {
         const catalog = yield* Catalog.Service
-        yield* catalog.transform((catalog) =>
-          catalog.provider.update(Provider.ID.make("cloudflare-workers-ai"), (provider) => {
-            provider.package = Provider.aisdk("test-provider")
-            provider.settings = { ...provider.settings, accountId: "configured-acct" }
+        yield* catalog.transform((draft) =>
+          draft.provider.update(providerID, (provider) => {
+            provider.package = Provider.aisdk("@ai-sdk/openai-compatible")
+            provider.settings = { accountId: "configured/account" }
           }),
         )
         yield* addPlugin()
-        expect(required(yield* catalog.provider.get(Provider.ID.make("cloudflare-workers-ai")))).toMatchObject({
-          package: "aisdk:test-provider",
-          settings: { baseURL: "https://api.cloudflare.com/client/v4/accounts/env-acct/ai/v1" },
-        })
-      }),
-    ),
-  )
 
-  it.effect("uses env API key over auth or configured API key and keeps the Cloudflare User-Agent", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: "acct", CLOUDFLARE_API_KEY: "env-key" }, () =>
-      Effect.gen(function* () {
-        const plugin = yield* Plugin.Service
-        const aisdk = yield* AISDK.Service
-        yield* addPlugin()
-        const result = yield* aisdk.runSDK({
-          model: Model.Info.make({
-            ...Model.Info.default(Provider.ID.make("cloudflare-workers-ai"), Model.ID.make("@cf/model")),
-            modelID: Model.ID.make("@cf/model"),
-            package: "aisdk:@ai-sdk/openai-compatible",
-            settings: { baseURL: "https://proxy.example/v1" },
-          }),
-          package: "@ai-sdk/openai-compatible",
-          options: {
-            name: "cloudflare-workers-ai",
-            apiKey: "auth-key",
-            baseURL: "https://proxy.example/v1",
-            headers: { custom: "header" },
-          },
-        })
-        const headers = yield* Effect.promise(() => Promise.resolve(cloudflareHeaders(result.sdk)))
-        expect(headers.authorization).toBe("Bearer env-key")
-        expect(headers.custom).toBe("header")
-        expect(headers["user-agent"]).toMatch(/^opencode\/.* cloudflare-workers-ai \(.+\) ai-sdk\/openai-compatible\//)
-      }),
-    ),
-  )
-
-  it.effect("expands account ID vars in endpoint URLs", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: "acct", CLOUDFLARE_API_KEY: "key" }, () =>
-      Effect.gen(function* () {
-        const plugin = yield* Plugin.Service
-        const aisdk = yield* AISDK.Service
-        yield* addPlugin()
-        const result = yield* aisdk.runSDK({
-          model: Model.Info.make({
-            ...Model.Info.default(Provider.ID.make("cloudflare-workers-ai"), Model.ID.make("@cf/model")),
-            modelID: Model.ID.make("@cf/model"),
-            package: "aisdk:@ai-sdk/openai-compatible",
-            settings: { baseURL: "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/ai/v1" },
-          }),
-          package: "@ai-sdk/openai-compatible",
-          options: {
-            name: "cloudflare-workers-ai",
-            baseURL: "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/ai/v1",
-          },
-        })
-        expect(cloudflareURL(result.sdk)).toBe(
-          "https://api.cloudflare.com/client/v4/accounts/acct/ai/v1/chat/completions",
+        expect(required(yield* catalog.provider.get(providerID)).settings?.baseURL).toBe(
+          "https://api.cloudflare.com/client/v4/accounts/configured%2Faccount/ai/v1",
         )
       }),
     ),
   )
 
-  it.effect("selects languageModel with the API model ID", () =>
-    Effect.gen(function* () {
-      const plugin = yield* Plugin.Service
-      const aisdk = yield* AISDK.Service
-      const calls: string[] = []
-      yield* addPlugin()
-      const result = yield* aisdk.runLanguage({
-        model: Model.Info.make({
-          ...Model.Info.default(Provider.ID.make("cloudflare-workers-ai"), Model.ID.make("alias")),
-          modelID: Model.ID.make("@cf/api-model"),
-          package: "aisdk:test-provider",
-        }),
-        sdk: fakeSelectorSdk(calls),
-        options: {},
-      })
-      expect(result.language).toBeDefined()
-      expect(calls).toEqual(["languageModel:@cf/api-model"])
-    }),
+  it.effect("expands account placeholders and preserves configured endpoints", () =>
+    withEnv("env-account", () =>
+      Effect.gen(function* () {
+        const catalog = yield* Catalog.Service
+        yield* catalog.transform((draft) =>
+          draft.provider.update(providerID, (provider) => {
+            provider.package = Provider.aisdk("@ai-sdk/openai-compatible")
+            provider.settings = {
+              baseURL: "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/ai/v1",
+            }
+          }),
+        )
+        yield* addPlugin()
+        expect(required(yield* catalog.provider.get(providerID)).settings?.baseURL).toBe(
+          "https://api.cloudflare.com/client/v4/accounts/env-account/ai/v1",
+        )
+      }),
+    ),
   )
 
-  it.effect("does not create an SDK for non OpenAI-compatible packages", () =>
-    withEnv({ CLOUDFLARE_ACCOUNT_ID: "acct", CLOUDFLARE_API_KEY: "key" }, () =>
+  it.effect("preserves a custom endpoint without an account ID", () =>
+    withEnv(undefined, () =>
       Effect.gen(function* () {
-        const plugin = yield* Plugin.Service
-        const aisdk = yield* AISDK.Service
-        yield* addPlugin()
-        const result = yield* aisdk.runSDK({
-          model: Model.Info.make({
-            ...Model.Info.default(Provider.ID.make("cloudflare-workers-ai"), Model.ID.make("@cf/model")),
-            modelID: Model.ID.make("@cf/model"),
-            package: "aisdk:@ai-sdk/anthropic",
-            settings: { baseURL: "https://proxy.example/v1" },
+        const catalog = yield* Catalog.Service
+        yield* catalog.transform((draft) =>
+          draft.provider.update(providerID, (provider) => {
+            provider.package = Provider.aisdk("@ai-sdk/openai-compatible")
+            provider.settings = { baseURL: "https://proxy.example/v1" }
           }),
-          package: "@ai-sdk/anthropic",
-          options: { name: "cloudflare-workers-ai" },
-        })
-        expect(result.sdk).toBeUndefined()
+        )
+        yield* addPlugin()
+        expect(required(yield* catalog.provider.get(providerID)).settings?.baseURL).toBe("https://proxy.example/v1")
       }),
     ),
   )

packages/core/test/plugin/provider-openai.test.ts

@@ -12,7 +12,6 @@ import { PluginHost } from "@opencode-ai/core/plugin/host"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
 import { OpenAIPlugin } from "@opencode-ai/core/plugin/provider/openai"
 import { Provider } from "@opencode-ai/core/provider"
-import type { SessionHttpHandler } from "@opencode-ai/plugin/effect/session"
 import { testEffect } from "../lib/effect"
 import { PluginTestLayer } from "./fixture"
 
@@ -31,26 +30,13 @@ function required<T>(value: T | undefined): T {
 }
 
 const http = Effect.fn(function* (providerID: Provider.ID, url: string) {
-  const middlewares: Parameters<PluginHooks.Domains["session"]["http"]["use"]>[0][] = []
-  yield* (yield* PluginHooks.Service).trigger("session", "http", {
+  const event = yield* (yield* PluginHooks.Service).trigger("session", "http.request", {
     sessionID: Session.ID.make("ses_test"),
     agent: Agent.ID.make("build"),
     model: Model.Ref.make({ providerID, id: Model.ID.make("gpt-5.5") }),
-    use: (item) =>
-      Effect.sync(() => {
-        middlewares.push(item)
-      }),
+    request: new Request(url, { method: "POST", body: "{}" }),
   })
-  const request = middlewares.reduce<SessionHttpHandler>(
-    (next, item) => (input: Request) => item(input, next),
-    (input: Request) => {
-      const headers = new Headers(input.headers)
-      headers.set("x-seen-url", input.url)
-      return Effect.succeed(new Response(null, { headers }))
-    },
-  )
-  const response = yield* request(new Request(url, { method: "POST", body: "{}" }))
-  return { url: response.headers.get("x-seen-url"), headers: Object.fromEntries(response.headers.entries()) }
+  return { url: event.request.url, headers: Object.fromEntries(event.request.headers.entries()) }
 })
 
 describe("OpenAIPlugin", () => {
@@ -140,7 +126,7 @@ describe("OpenAIPlugin", () => {
       const eligible = required(yield* catalog.model.get(Provider.ID.openai, Model.ID.make("gpt-5.5")))
       expect(eligible.package).toBe("@opencode-ai/ai/providers/openai")
       expect(eligible.cost).toEqual([])
-      expect(eligible.limit).toEqual({ context: 272_000, input: 272_000, output: 128_000 })
+      expect(eligible.limit).toEqual({ context: 400_000, input: 272_000, output: 128_000 })
       expect(eligible.enabled).toBe(true)
       expect(required(yield* catalog.model.get(Provider.ID.openai, Model.ID.make("gpt-5.5-pro"))).enabled).toBe(
         false,
@@ -149,14 +135,14 @@ describe("OpenAIPlugin", () => {
         false,
       )
       expect(required(yield* catalog.model.get(Provider.ID.openai, Model.ID.make("gpt-5.4"))).limit).toEqual({
-        context: 272_000,
+        context: 400_000,
         input: 272_000,
         output: 64_000,
       })
       expect(required(yield* catalog.model.get(Provider.ID.openai, Model.ID.make("gpt-5.6"))).enabled).toBe(false)
       const gpt56 = required(yield* catalog.model.get(Provider.ID.openai, Model.ID.make("gpt-5.6-sol")))
       expect(gpt56.enabled).toBe(true)
-      expect(gpt56.limit).toEqual({ context: 272_000, input: 272_000, output: 128_000 })
+      expect(gpt56.limit).toEqual({ context: 400_000, input: 272_000, output: 128_000 })
       expect(required(yield* catalog.model.get(Provider.ID.openai, Model.ID.make("gpt-4.1"))).enabled).toBe(false)
     }),
   )

packages/core/test/session-runner-recorded.test.ts

@@ -255,6 +255,7 @@ describe("SessionRunnerLLM recorded", () => {
 describe("SessionModelRequest HTTP bridge", () => {
   const bodies: Uint8Array[] = []
   const methods: string[] = []
+  const headers: Array<string | undefined> = []
   const response = [
     'data: {"id":"chatcmpl_test","object":"chat.completion.chunk","created":0,"model":"gpt-4o-mini","choices":[{"index":0,"delta":{"role":"assistant","content":"Hello!"},"finish_reason":null}]}',
     'data: {"id":"chatcmpl_test","object":"chat.completion.chunk","created":0,"model":"gpt-4o-mini","choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}',
@@ -268,6 +269,7 @@ describe("SessionModelRequest HTTP bridge", () => {
         if (request.body._tag !== "Uint8Array") throw new Error(`Unexpected request body: ${request.body._tag}`)
         methods.push(request.method)
         bodies.push(request.body.body.slice())
+        headers.push(request.headers["x-hook"])
         return HttpClientResponse.fromWeb(
           request,
           new Response(response, { headers: { "content-type": "text/event-stream" } }),
@@ -275,14 +277,16 @@ describe("SessionModelRequest HTTP bridge", () => {
       }),
     ),
   )
-  const retryIt = testEffect(
+  const httpIt = testEffect(
     testLayer(LLMClient.layer.pipe(Layer.provide(RequestExecutor.layer.pipe(Layer.provide(transport))))),
   )
 
-  retryIt.effect("lets an Effect plugin send the same POST Request twice", () =>
+  httpIt.effect("runs Effect HTTP request and response hooks around one provider request", () =>
     Effect.gen(function* () {
       bodies.length = 0
       methods.length = 0
+      headers.length = 0
+      const seen: string[] = []
       const agents = yield* Agent.Service
       const catalog = yield* Catalog.Service
       const hooks = yield* PluginHooks.Service
@@ -297,13 +301,20 @@ describe("SessionModelRequest HTTP bridge", () => {
         catalog: catalogHost(catalog),
         session: { hook: (name, callback) => hooks.register("session", name, callback) },
       })
-      yield* pluginHost.session.hook("http", (event) =>
-        event.use((request, next) =>
-          Effect.gen(function* () {
-            yield* next(request).pipe(Effect.flatMap((response) => Effect.promise(() => response.text())))
-            return yield* next(request)
-          }),
-        ),
+      yield* pluginHost.session.hook("http.request", (event) =>
+        Effect.sync(() => {
+          seen.push("request")
+          event.request.headers.set("x-hook", "effect")
+        }),
+      )
+      yield* pluginHost.session.hook("http.response", (event) =>
+        Effect.gen(function* () {
+          seen.push(`response:${event.response.status}:${event.request.headers.get("x-hook")}`)
+          event.response = new Response(
+            (yield* Effect.promise(() => event.response.text())).replace("Hello!", "Hooked!"),
+            event.response,
+          )
+        }),
       )
       yield* Effect.forEach(SystemPromptPlugin.Plugins, (plugin) => plugin.effect(pluginHost), { discard: true })
       const { db } = yield* Database.Service
@@ -331,10 +342,15 @@ describe("SessionModelRequest HTTP bridge", () => {
 
       yield* session.resume(retrySessionID)
 
-      expect(methods).toEqual(["POST", "POST"])
-      expect(bodies).toHaveLength(2)
+      expect(methods).toEqual(["POST"])
+      expect(headers).toEqual(["effect"])
+      expect(seen).toEqual(["request", "response:200:effect"])
+      expect(bodies).toHaveLength(1)
       expect(bodies[0]?.byteLength).toBeGreaterThan(0)
-      expect(bodies[1]).toEqual(bodies[0])
+      expect((yield* session.context(retrySessionID))[1]).toMatchObject({
+        type: "assistant",
+        content: [{ type: "text", text: "Hooked!" }],
+      })
     }),
   )
 })

packages/core/test/tool-websearch.test.ts

@@ -241,7 +241,6 @@ describe("WebSearchTool registration", () => {
         {
           sessionID,
           title: "Web Search",
-          coalesce: "msg_tool_test:websearch-consent",
           metadata: { kind: "websearch.provider" },
           fields: [
             {
@@ -299,7 +298,6 @@ describe("WebSearchTool registration", () => {
       expect(formRequests[1]).toEqual({
         sessionID,
         title: "Choose a web search provider",
-        coalesce: "msg_tool_test:websearch-provider",
         metadata: { kind: "websearch.provider" },
         fields: [
           {

packages/effect-drizzle-sqlite/src/sqlite-core/effect/select.ts

@@ -44,11 +44,12 @@ export type SQLiteEffectSelectPrepare<
   TEffectHKT
 >
 
+// Explicit variance prevents comparisons from recursively scanning Drizzle's conditional select types.
 export class SQLiteEffectSelectBuilder<
-  TSelection extends SelectedFields | undefined,
-  TRunResult,
-  TEffectHKT extends QueryEffectHKTBase = QueryEffectHKTBase,
-  TBuilderMode extends "db" | "qb" = "db",
+  out TSelection extends SelectedFields | undefined,
+  out TRunResult,
+  out TEffectHKT extends QueryEffectHKTBase = QueryEffectHKTBase,
+  out TBuilderMode extends "db" | "qb" = "db",
 > {
   static readonly [entityKind]: string = "SQLiteEffectSelectBuilder"
 

packages/effect-drizzle-sqlite/src/sqlite-core/effect/session.ts

@@ -303,10 +303,11 @@ export class SQLiteEffectPreparedQuery<
   }
 }
 
+// Explicit variance prevents comparisons from recursively scanning the full Drizzle query-builder graph.
 export abstract class SQLiteEffectSession<
-  TEffectHKT extends QueryEffectHKTBase = QueryEffectHKTBase,
-  TRunResult = unknown,
-  TRelations extends AnyRelations = EmptyRelations,
+  out TEffectHKT extends QueryEffectHKTBase = QueryEffectHKTBase,
+  out TRunResult = unknown,
+  out TRelations extends AnyRelations = EmptyRelations,
 > {
   static readonly [entityKind]: string = "SQLiteEffectSession"
 
@@ -404,9 +405,9 @@ export abstract class SQLiteEffectSession<
 }
 
 export abstract class SQLiteEffectTransaction<
-  TEffectHKT extends QueryEffectHKTBase,
-  TRunResult,
-  TRelations extends AnyRelations = EmptyRelations,
+  out TEffectHKT extends QueryEffectHKTBase,
+  out TRunResult,
+  out TRelations extends AnyRelations = EmptyRelations,
 > extends SQLiteEffectDatabase<TEffectHKT, TRunResult, TRelations> {
   static override readonly [entityKind]: string = "SQLiteEffectTransaction"
 

packages/plugin/src/effect/session.ts

@@ -3,7 +3,7 @@ import type { Message, SystemPart } from "@opencode-ai/ai"
 import type { Agent } from "@opencode-ai/schema/agent"
 import type { Model } from "@opencode-ai/schema/model"
 import type { Session } from "@opencode-ai/schema/session"
-import type { Effect, JsonSchema } from "effect"
+import type { JsonSchema } from "effect"
 import type { Hooks } from "./registration.js"
 
 export interface SessionContext {
@@ -15,23 +15,25 @@ export interface SessionContext {
   tools: Record<string, { description: string; input: JsonSchema.JsonSchema }>
 }
 
-export interface SessionHttp {
+export interface SessionHttpRequest {
   readonly sessionID: Session.ID
   readonly agent: Agent.ID
   readonly model: Model.Ref
-  readonly use: (middleware: SessionHttpMiddleware) => Effect.Effect<void>
+  request: Request
 }
 
-export type SessionHttpHandler = (request: Request) => Effect.Effect<Response, Error>
-
-export type SessionHttpMiddleware = (
-  request: Request,
-  next: SessionHttpHandler,
-) => Effect.Effect<Response, Error>
+export interface SessionHttpResponse {
+  readonly sessionID: Session.ID
+  readonly agent: Agent.ID
+  readonly model: Model.Ref
+  readonly request: Request
+  response: Response
+}
 
 export interface SessionHooks {
   readonly context: SessionContext
-  readonly http: SessionHttp
+  readonly "http.request": SessionHttpRequest
+  readonly "http.response": SessionHttpResponse
 }
 
 export type SessionDomain = Pick<

packages/plugin/src/promise/session.ts

@@ -15,23 +15,25 @@ export interface SessionContext {
   tools: Record<string, { description: string; input: JsonSchema.JsonSchema }>
 }
 
-export interface SessionHttp {
+export interface SessionHttpRequest {
   readonly sessionID: Session.ID
   readonly agent: Agent.ID
   readonly model: Model.Ref
-  readonly use: (middleware: SessionHttpMiddleware) => void
+  request: Request
 }
 
-export type SessionHttpHandler = (request: Request) => Promise<Response>
-
-export type SessionHttpMiddleware = (
-  request: Request,
-  next: SessionHttpHandler,
-) => Promise<Response> | Response
+export interface SessionHttpResponse {
+  readonly sessionID: Session.ID
+  readonly agent: Agent.ID
+  readonly model: Model.Ref
+  readonly request: Request
+  response: Response
+}
 
 export interface SessionHooks {
   readonly context: SessionContext
-  readonly http: SessionHttp
+  readonly "http.request": SessionHttpRequest
+  readonly "http.response": SessionHttpResponse
 }
 
 export type SessionDomain = Pick<

packages/schema/src/form.ts

@@ -124,9 +124,6 @@ const InfoBase = {
   // on non-session owners anywhere else.
   sessionID: Schema.String,
   title: Schema.String,
-  coalesce: Schema.String.pipe(optional).annotate({
-    description: "Client-local key for displaying equivalent pending forms once and broadcasting one response.",
-  }),
   metadata: Metadata.pipe(optional),
 }
 

packages/tui/src/routes/home.tsx

@@ -93,13 +93,13 @@ export function Home() {
       <box width="100%" flexShrink={0}>
         <PluginSlot name="home.footer" input={{}} mode="replace" />
       </box>
-      <Show when={forms()[0]?.coalesce ?? forms()[0]?.id} keyed>
+      <Show when={forms()[0]?.id} keyed>
         {(_) => {
           const form = forms()[0]
           return form ? (
             <box position="absolute" zIndex={2000} left={0} right={0} bottom={1} paddingLeft={2} paddingRight={2}>
               <box width="100%">
-                <FormPrompt form={form} forms={forms()} />
+                <FormPrompt form={form} />
               </box>
             </box>
           ) : null

packages/tui/src/routes/session/form.tsx

@@ -42,7 +42,7 @@ function requestOptions(form: FormWithLocation) {
   }
 }
 
-export function FormPrompt(props: { form: FormWithLocation; forms?: readonly FormWithLocation[] }) {
+export function FormPrompt(props: { form: FormWithLocation }) {
   const client = useClient()
   const themes = useThemes()
   const theme = useTheme("elevated")
@@ -69,11 +69,6 @@ export function FormPrompt(props: { form: FormWithLocation; forms?: readonly For
   let textarea: TextareaRenderable | undefined
   let review: ScrollBoxRenderable | undefined
 
-  const forms = createMemo(() => {
-    if (!props.form.coalesce) return [props.form]
-    return (props.forms ?? [props.form]).filter((form) => form.coalesce === props.form.coalesce)
-  })
-
   const message = createMemo(() => {
     const value = props.form.metadata?.["message"]
     return typeof value === "string" ? value : undefined
@@ -185,30 +180,24 @@ export function FormPrompt(props: { form: FormWithLocation; forms?: readonly For
     setStore("error", "")
   }
 
-  function reply(answer: Record<string, FormValue>) {
-    Promise.all(
-      forms().map((form) =>
-        client.api.form.reply(
-          {
-            sessionID: form.sessionID,
-            formID: form.id,
-            answer,
-          },
-          requestOptions(form),
-        ),
-      ),
-    ).catch((error: unknown) => {
-      setStore(
-        "error",
-        typeof error === "object" && error !== null && "message" in error && typeof error.message === "string"
-          ? error.message
-          : "Invalid answer",
-      )
-    })
-  }
-
   function replySingle(field: FormAnswerField, value: FormValue) {
-    reply({ [field.key]: value })
+    client.api.form
+      .reply(
+        {
+          sessionID: props.form.sessionID,
+          formID: props.form.id,
+          answer: { [field.key]: value },
+        },
+        requestOptions(props.form),
+      )
+      .catch((error: unknown) => {
+        setStore(
+          "error",
+          typeof error === "object" && error !== null && "message" in error && typeof error.message === "string"
+            ? error.message
+            : "Invalid answer",
+        )
+      })
   }
 
   function pick(value: FormValue, customValue?: string) {
@@ -361,8 +350,7 @@ export function FormPrompt(props: { form: FormWithLocation; forms?: readonly For
   }
 
   function cancel() {
-    for (const form of forms())
-      void client.api.form.cancel({ sessionID: form.sessionID, formID: form.id }, requestOptions(form))
+    void client.api.form.cancel({ sessionID: props.form.sessionID, formID: props.form.id }, requestOptions(props.form))
   }
 
   function openExternal() {
@@ -414,14 +402,28 @@ export function FormPrompt(props: { form: FormWithLocation; forms?: readonly For
       setStore("error", formValidateValue(invalid, store.answers[invalid.key]) ?? "Invalid answer")
       return
     }
-    reply(
-      Object.fromEntries(
-        fields().flatMap((field) => {
-          const value = store.answers[field.key]
-          return value === undefined ? [] : [[field.key, value] as const]
-        }),
-      ),
-    )
+    client.api.form
+      .reply(
+        {
+          sessionID: props.form.sessionID,
+          formID: props.form.id,
+          answer: Object.fromEntries(
+            fields().flatMap((field) => {
+              const value = store.answers[field.key]
+              return value === undefined ? [] : [[field.key, value] as const]
+            }),
+          ),
+        },
+        requestOptions(props.form),
+      )
+      .catch((error: unknown) => {
+        setStore(
+          "error",
+          typeof error === "object" && error !== null && "message" in error && typeof error.message === "string"
+            ? error.message
+            : "Invalid answer",
+        )
+      })
   }
 
   onMount(() => onCleanup(keymap.mode.push(FORM_MODE)))

packages/tui/src/routes/session/index.tsx

@@ -1026,10 +1026,10 @@ export function Session() {
                   </Show>
                 </Match>
                 <Match when={forms().length > 0}>
-                  <Show when={forms()[0]?.coalesce ?? forms()[0]?.id} keyed>
+                  <Show when={forms()[0]?.id} keyed>
                     {(_) => {
                       const form = forms()[0]
-                      return form ? <FormPrompt form={form} forms={forms()} /> : null
+                      return form ? <FormPrompt form={form} /> : null
                     }}
                   </Show>
                 </Match>

packages/tui/test/cli/tui/form.test.tsx

@@ -15,7 +15,7 @@ import { TestTuiContexts } from "../../fixture/tui-environment"
 import { createTuiResolvedConfig } from "../../fixture/tui-runtime"
 import { createApi, createEventStream, createFetch } from "../../fixture/tui-client"
 
-async function mountForm(root: string, width = 80, coalesce = false) {
+async function mountForm(root: string, width = 80) {
   const state = path.join(root, "state")
   await mkdir(state, { recursive: true })
 
@@ -24,7 +24,7 @@ async function mountForm(root: string, width = 80, coalesce = false) {
   const events = createEventStream()
   const transport = createFetch(
     (url, request) =>
-      /^\/api\/session\/ses_test\/form\/frm_(?:test|other)\/reply$/.test(url.pathname)
+      url.pathname === "/api/session/ses_test/form/frm_test/reply"
         ? request.json().then((answer) => {
             replies.push(answer)
             return new Response(null, { status: 204 })
@@ -37,7 +37,6 @@ async function mountForm(root: string, width = 80, coalesce = false) {
     id: "frm_test",
     sessionID: "ses_test",
     title: "Authorization required",
-    ...(coalesce ? { coalesce: "authorization" } : {}),
     fields: [
       {
         key: "authorization",
@@ -72,7 +71,7 @@ async function mountForm(root: string, width = 80, coalesce = false) {
               <ClientProvider api={createApi(transport.fetch)}>
                 <ThemeProvider mode="dark" source={{ discover: () => Promise.resolve({}) }}>
                   <ToastProvider>
-                    <FormPrompt form={form} forms={coalesce ? [form, { ...form, id: "frm_other" }] : undefined} />
+                    <FormPrompt form={form} />
                   </ToastProvider>
                 </ThemeProvider>
               </ClientProvider>
@@ -127,24 +126,3 @@ test("includes external acknowledgements in progress", async () => {
     prompt.app.renderer.destroy()
   }
 })
-
-test("replies to every coalesced form", async () => {
-  await using tmp = await tmpdir()
-  const prompt = await mountForm(tmp.path, 80, true)
-  try {
-    prompt.app.mockInput.pressKey("right")
-    await prompt.app.waitForFrame((frame) => frame.includes("(acknowledgement required)"))
-    prompt.app.mockInput.pressEnter()
-    await prompt.app.waitForFrame((frame) => frame.includes("External action must be acknowledged"))
-    prompt.app.mockInput.pressKey("left")
-    prompt.app.mockInput.pressKey("c")
-    await prompt.app.waitForFrame((frame) => frame.includes("press enter to confirm"))
-    prompt.app.mockInput.pressEnter()
-    await prompt.app.waitForFrame((frame) => frame.includes("Acknowledged"))
-    prompt.app.mockInput.pressEnter()
-    await prompt.app.waitFor(() => prompt.replies.length === 2)
-    expect(prompt.replies).toEqual([{ answer: { authorization: true } }, { answer: { authorization: true } }])
-  } finally {
-    prompt.app.renderer.destroy()
-  }
-})

packages/www/content/docs/build/plugins.mdx

@@ -246,19 +246,27 @@ Runtime hooks intercept live operations:
 | `ctx.aisdk.hook("sdk", callback)`           | `sdk`, after inspecting `model`, `package`, and `options`                      |
 | `ctx.aisdk.hook("language", callback)`      | `language`, after inspecting `model`, `sdk`, and `options`                     |
 | `ctx.session.hook("context", callback)`     | `system`, `messages`, and the `tools` record immediately before model dispatch |
-| `ctx.session.hook("http", callback)`       | `use`, registering request and response handling                               |
+| `ctx.session.hook("http.request", callback)` | `request`, immediately before provider dispatch                                |
+| `ctx.session.hook("http.response", callback)` | `response`, immediately after the provider responds                            |
 | `ctx.tool.hook("execute.before", callback)` | `input`, before the selected tool executes                                     |
 | `ctx.tool.hook("execute.after", callback)`  | Terminal `result` on success or `error` on failure                             |
 
-HTTP hooks can modify requests, inspect responses, retry, or return a
-response without calling the provider. It applies to native models; AI SDK
-models do not currently pass through this hook.
+HTTP hooks can modify requests and responses. They apply to native models; AI
+SDK models do not currently pass through these hooks. Request and response
+bodies are one-shot streams. Use `clone()` when you intentionally need a
+separate reader, but be aware that its slower branch may buffer data. To inspect
+or modify chunks while preserving streaming, replace the body with one piped
+through a `TransformStream`.
 
 ```ts
-await ctx.session.hook("http", (event) => {
-  event.use((request, next) => {
-    request.headers.set("x-session-id", event.sessionID)
-    return next(request)
+await ctx.session.hook("http.request", (event) => {
+  event.request.headers.set("x-session-id", event.sessionID)
+})
+
+await ctx.session.hook("http.response", (event) => {
+  event.response = new Response(event.response.body, {
+    status: event.response.status,
+    headers: { ...Object.fromEntries(event.response.headers), "x-plugin": "enabled" },
   })
 })
 ```