refactor(app): establish v2 session controller

.opencode/plugins/tui/discovery-smoke.ts

@@ -2,12 +2,15 @@ import type { Context } from "../../../packages/plugin/src/tui/context"
 
 export default {
   id: "test.tui-discovery-smoke",
-  setup(_context: Context) {
-    // context.ui.toast.show({
-    //   title: "TUI plugin discovery works",
-    //   message: "Loaded .opencode/plugins/tui/discovery-smoke.ts",
-    //   variant: "success",
-    //   duration: 30_000,
-    // })
+  setup(context: Context) {
+    const timer = setTimeout(() => {
+      context.ui.toast.show({
+        title: "TUI plugin discovery works",
+        message: "Loaded .opencode/plugins/tui/discovery-smoke.ts",
+        variant: "success",
+        duration: 30_000,
+      })
+    }, 1_000)
+    return () => clearTimeout(timer)
   },
 }

bun.lock

@@ -64,6 +64,7 @@
         "@opencode-ai/client": "workspace:*",
         "@opencode-ai/core": "workspace:*",
         "@opencode-ai/schema": "workspace:*",
+        "@opencode-ai/sdk": "file:vendor/opencode-ai-sdk-1.18.8-dev.tgz",
         "@opencode-ai/session-ui": "workspace:*",
         "@opencode-ai/ui": "workspace:*",
         "@pierre/trees": "1.0.0-beta.4",
@@ -401,11 +402,8 @@
         "immer": "11.1.4",
         "jsonc-parser": "3.3.1",
         "semver": "^7.6.3",
-        "tree-sitter-bash": "0.25.0",
-        "tree-sitter-powershell": "0.25.10",
         "turndown": "7.2.0",
         "venice-ai-sdk-provider": "2.1.1",
-        "web-tree-sitter": "0.25.10",
         "which": "6.0.1",
         "zod": "catalog:",
       },
@@ -602,7 +600,6 @@
         "zod": "catalog:",
       },
       "devDependencies": {
-        "@opencode-ai/theme": "workspace:*",
         "@opentui/core": "catalog:",
         "@opentui/keymap": "catalog:",
         "@opentui/solid": "catalog:",
@@ -614,14 +611,12 @@
         "typescript": "catalog:",
       },
       "peerDependencies": {
-        "@opencode-ai/theme": "workspace:*",
         "@opentui/core": ">=0.4.5",
         "@opentui/keymap": ">=0.4.5",
         "@opentui/solid": ">=0.4.5",
         "solid-js": ">=1.9.0",
       },
       "optionalPeers": [
-        "@opencode-ai/theme",
         "@opentui/core",
         "@opentui/keymap",
         "@opentui/solid",
@@ -1075,11 +1070,9 @@
   },
   "trustedDependencies": [
     "esbuild",
-    "tree-sitter-powershell",
     "protobufjs",
     "electron",
     "web-tree-sitter",
-    "tree-sitter-bash",
   ],
   "patchedDependencies": {
     "@pierre/trees@1.0.0-beta.4": "patches/@pierre%2Ftrees@1.0.0-beta.4.patch",
@@ -4076,10 +4069,10 @@
 
     "fetch-blob": ["fetch-blob@3.2.0", "", { "dependencies": { "node-domexception": "^1.0.0", "web-streams-polyfill": "^3.0.3" } }, "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ=="],
 
-    "ffi-rs": ["ffi-rs@1.3.2", "", { "optionalDependencies": { "@yuuang/ffi-rs-android-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-x64": "1.3.2", "@yuuang/ffi-rs-linux-arm-gnueabihf": "1.3.2", "@yuuang/ffi-rs-linux-arm64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-arm64-musl": "1.3.2", "@yuuang/ffi-rs-linux-x64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-x64-musl": "1.3.2", "@yuuang/ffi-rs-win32-arm64-msvc": "1.3.2", "@yuuang/ffi-rs-win32-ia32-msvc": "1.3.2", "@yuuang/ffi-rs-win32-x64-msvc": "1.3.2" } }, "sha512-4s8dX9VbBw/jd5NOuE3EJRqXaIVdjMyiumeeDzrOhtjQRwp6Bz2za7iksWXTnvTQKV/tTdm1s1w7mObe92zPjQ=="],
-
     "file-uri-to-path": ["file-uri-to-path@1.0.0", "", {}, "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw=="],
 
+    "ffi-rs": ["ffi-rs@1.3.2", "", { "optionalDependencies": { "@yuuang/ffi-rs-android-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-x64": "1.3.2", "@yuuang/ffi-rs-linux-arm-gnueabihf": "1.3.2", "@yuuang/ffi-rs-linux-arm64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-arm64-musl": "1.3.2", "@yuuang/ffi-rs-linux-x64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-x64-musl": "1.3.2", "@yuuang/ffi-rs-win32-arm64-msvc": "1.3.2", "@yuuang/ffi-rs-win32-ia32-msvc": "1.3.2", "@yuuang/ffi-rs-win32-x64-msvc": "1.3.2" } }, "sha512-4s8dX9VbBw/jd5NOuE3EJRqXaIVdjMyiumeeDzrOhtjQRwp6Bz2za7iksWXTnvTQKV/tTdm1s1w7mObe92zPjQ=="],
+
     "filelist": ["filelist@1.0.6", "", { "dependencies": { "minimatch": "^5.0.1" } }, "sha512-5giy2PkLYY1cP39p17Ech+2xlpTRL9HLspOfEgm0L6CwBXBTgsK5ou0JtzYuepxkaQ/tvhCFIJ5uXo0OrM2DxA=="],
 
     "fill-range": ["fill-range@7.1.1", "", { "dependencies": { "to-regex-range": "^5.0.1" } }, "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg=="],
@@ -5638,10 +5631,6 @@
 
     "traverse": ["traverse@0.3.9", "", {}, "sha512-iawgk0hLP3SxGKDfnDJf8wTz4p2qImnyihM5Hh/sGvQ3K37dPi/w8sRhdNIxYA1TwFwc5mDhIJq+O0RsvXBKdQ=="],
 
-    "tree-sitter-bash": ["tree-sitter-bash@0.25.0", "", { "dependencies": { "node-addon-api": "^8.2.1", "node-gyp-build": "^4.8.2" }, "peerDependencies": { "tree-sitter": "^0.25.0" }, "optionalPeers": ["tree-sitter"] }, "sha512-gZtlj9+qFS81qKxpLfD6H0UssQ3QBc/F0nKkPsiFDyfQF2YBqYvglFJUzchrPpVhZe9kLZTrJ9n2J6lmka69Vg=="],
-
-    "tree-sitter-powershell": ["tree-sitter-powershell@0.25.10", "", { "dependencies": { "node-addon-api": "^7.1.0", "node-gyp-build": "^4.8.0" }, "peerDependencies": { "tree-sitter": "^0.25.0" }, "optionalPeers": ["tree-sitter"] }, "sha512-bEt8QoySpGFnU3aa8WedQyNMaN6aTwy/WUbvIVt0JSKF+BbJoSHNHu+wCbhj7xLMsfB0AuffmiJm+B8gzva8Lg=="],
-
     "treeverse": ["treeverse@3.0.0", "", {}, "sha512-gcANaAnd2QDZFmHFEOF4k7uc1J/6a6z3DJMd/QwEyxLoKGiptJRwid582r7QIsFlFMIZ3SnxfS52S4hm2DHkuQ=="],
 
     "trim-lines": ["trim-lines@3.0.1", "", {}, "sha512-kRj8B+YHZCc9kQYdWfJB2/oUl9rA99qbowYYBtr4ui4mZyAQ2JpvVBd/6U2YloATfqBhBTSMhTpgBHtU0Mf3Rg=="],
@@ -6338,6 +6327,8 @@
 
     "@openauthjs/openauth/jose": ["jose@5.9.6", "", {}, "sha512-AMlnetc9+CV9asI19zHmrgS/WYsWUwCn2R7RzlbJWD7F9eWYUTGyBmU9o6PxngtLGOiDGPRu+Uc4fhKzbpteZQ=="],
 
+    "@opencode-ai/app/@opencode-ai/sdk": ["@opencode-ai/sdk@vendor/opencode-ai-sdk-1.18.8-dev.tgz", { "dependencies": { "cross-spawn": "7.0.6" } }, "sha512-C2nfk4x0sPINwE5V6DPkFSuH3PkUmKPWHPzxpXC1j+3Ui5hslLCWJbkk8WcOG1Lyt3C0+yp4ea64v/kmtYCO4w=="],
+
     "@opencode-ai/cli/semver": ["semver@7.7.4", "", { "bin": { "semver": "bin/semver.js" } }, "sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA=="],
 
     "@opencode-ai/console-app/@smithy/eventstream-codec": ["@smithy/eventstream-codec@4.2.7", "", { "dependencies": { "@aws-crypto/crc32": "5.2.0", "@smithy/types": "^4.11.0", "@smithy/util-hex-encoding": "^4.2.0", "tslib": "^2.6.2" } }, "sha512-DrpkEoM3j9cBBWhufqBwnbbn+3nf1N9FP6xuVJ+e220jbactKuQgaZwjwP5CP1t+O94brm2JgVMD2atMGX3xIQ=="],
@@ -6862,8 +6853,6 @@
 
     "topojson-client/commander": ["commander@2.20.3", "", {}, "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ=="],
 
-    "tree-sitter-bash/node-addon-api": ["node-addon-api@8.9.0", "", {}, "sha512-ekZMeaaIzSQTSpr7X2X3iJM7lTzgnx8ahAG9pJfT/7+14mlEM8ZYQ9cgCDvSSRbReFK0oHli3WrZdCiRsgAT9Q=="],
-
     "tw-to-css/postcss": ["postcss@8.4.31", "", { "dependencies": { "nanoid": "^3.3.6", "picocolors": "^1.0.0", "source-map-js": "^1.0.2" } }, "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ=="],
 
     "tw-to-css/tailwindcss": ["tailwindcss@3.3.2", "", { "dependencies": { "@alloc/quick-lru": "^5.2.0", "arg": "^5.0.2", "chokidar": "^3.5.3", "didyoumean": "^1.2.2", "dlv": "^1.1.3", "fast-glob": "^3.2.12", "glob-parent": "^6.0.2", "is-glob": "^4.0.3", "jiti": "^1.18.2", "lilconfig": "^2.1.0", "micromatch": "^4.0.5", "normalize-path": "^3.0.0", "object-hash": "^3.0.0", "picocolors": "^1.0.0", "postcss": "^8.4.23", "postcss-import": "^15.1.0", "postcss-js": "^4.0.1", "postcss-load-config": "^4.0.1", "postcss-nested": "^6.0.1", "postcss-selector-parser": "^6.0.11", "postcss-value-parser": "^4.2.0", "resolve": "^1.22.2", "sucrase": "^3.32.0" }, "bin": { "tailwind": "lib/cli.js", "tailwindcss": "lib/cli.js" } }, "sha512-9jPkMiIBXvPc2KywkraqsUfbfj+dHDb+JPWtSJa9MLFdrPyazI7q6WX2sUrm7R9eVR7qqv3Pas7EvQFzxKnI6w=="],

docs/design/v1-v2-database-migration.md

@@ -1,118 +0,0 @@
-# V1 to V2 Database Migration
-
-## Approach
-
-- Use the `dev` branch database schema and migration registry as the V1 baseline.
-- Remove migrations that exist only on the V2 branch.
-- Generate one canonical migration from the `dev` schema to the final V2 schema.
-- Add explicit data operations to that migration where generated DDL is insufficient.
-- Test the migration against a populated database at the exact `dev` schema.
-
-## Preserve
-
-The canonical V1 data remains in its existing tables. In particular, preserve `session`, `message`, and `part` rows.
-
-Preserve `workspace` rows and existing `session.workspace_id` values unchanged. The migration must not clear or rebuild
-workspace relationships.
-
-Keep the `todo` table and its data unchanged. V2 does not currently migrate todos into another representation, and the
-generated migration must not drop the table.
-
-## Truncate
-
-Truncate these pre-launch V2 tables before applying schema changes:
-
-- `event`
-- `event_sequence`
-- `session_message`
-
-These rows are not canonical V1 data. Truncating `event` before adding the required `event.created` column means the
-column needs neither a backfill nor a default. After truncation, rebuild `session_message` from canonical V1 `message`
-and `part` rows rather than retaining its pre-launch V2 contents.
-
-## Message Backfill
-
-Backfill canonical V1 history from `message` and `part` into `session_message`. This is the main data transformation in
-the migration. Preserving the V1 tables alone keeps the data safe but does not make existing history visible through the
-V2 session APIs, which read `session_message`.
-
-Reuse each V1 `message.id` as the corresponding `session_message.id`. Stable IDs keep the migration deterministic and
-avoid rewriting other persisted state that may refer to a message.
-
-Within each session, order V1 messages by `time_created` and then `id`, matching the existing V1 message index. Assign
-contiguous `session_message.seq` values starting at `0`.
-
-Map ordinary V1 messages one-to-one by role. Each ordinary V1 user message becomes one V2 `user` row, and each ordinary
-V1 assistant message becomes one V2 `assistant` row. Fold the source message's ordered V1 parts into that row's V2
-payload.
-
-Handle semantic marker parts before applying the ordinary mapping. In particular, a V1 user message containing a
-`compaction` part and its paired assistant summary represent one compaction operation, not two ordinary messages. Special
-part mappings must be decided explicitly before implementing the backfill.
-
-V1 synthetic content is represented by user text parts with `synthetic: true`, not by a separate message role. A V1 user
-message whose visible text parts are all synthetic should become a V2 `synthetic` message. If a V1 user message mixes
-ordinary and synthetic content, preserve the ordinary content in the V2 `user` row and emit the synthetic content as an
-adjacent V2 `synthetic` row. Ignore text parts marked `ignored`, matching V1 model-history behavior.
-
-Use the V1 compaction user message ID as the ID of the collapsed V2 compaction message. This matches V2's use of the
-admitted compaction input ID and preserves references to the initiating message.
-
-For a completed compaction, create one V2 `compaction` row with `status: "completed"`. Set `reason` from the V1
-compaction part's `auto` flag, join the paired summary assistant's nonempty text parts with blank lines for `summary`, and
-serialize the retained V1 tail beginning at `tail_start_id` for `recent`. Use an empty `recent` value when no tail was
-retained, and use the compaction user message creation time. Do not emit the paired summary assistant as a separate V2
-assistant row.
-
-After rebuilding `session_message`, seed `event_sequence` with one row per migrated session. Set its watermark to that
-session's maximum backfilled `session_message.seq`. This prevents new V2 events from reusing sequence numbers or sorting
-before migrated history. The `event` table remains empty.
-
-## Drop
-
-Drop these pre-launch V2 tables without preserving or transforming their rows:
-
-- `session_input`
-- `session_context_epoch`
-
-Do not transfer `session_input` rows into `session_pending`.
-
-## Create Empty
-
-Let the generated migration create these tables empty:
-
-- `instruction_blob`
-- `instruction_entry`
-- `instruction_state`
-- `session_pending`
-- `kv`
-
-V1 has no canonical data to backfill into these tables. V2 initializes their state as it runs.
-
-## Fork Storage
-
-V1 has no fork-boundary state to backfill. New V2 forks use a required message boundary and persist it in
-`session.fork_boundary`. The durable fork event contains no parent sequence. Its resolved boundary is one of:
-
-- `before`: copy messages before the identified message.
-- `through`: copy messages through the identified message.
-
-Forking an empty session is not supported. `session.fork_seq` and `session.fork_message_id` are not part of the final V2
-schema.
-
-New nullable session columns, including `fork_session_id`, `fork_boundary`, and `time_suspended`, require no explicit
-backfill. Existing rows naturally receive `NULL` when the generated migration adds the columns.
-
-## Verification
-
-The canonical migration test should seed representative V1 sessions, messages, parts, todos, projects, accounts,
-credentials, permissions, shares, and workspaces. After migration, it should verify:
-
-- Preserved rows and encoded values remain unchanged.
-- Todo rows remain available in the unchanged `todo` table.
-- `event` is empty, and stale pre-launch rows are absent from the rebuilt projections.
-- Backfilled `session_message` rows represent the canonical V1 `message` and `part` history.
-- Each migrated session's `event_sequence` watermark matches its maximum backfilled message sequence.
-- Dropped tables no longer exist.
-- New tables exist and are empty.
-- The final schema has no ungenerated changes.

packages/ai/AGENTS.md

@@ -46,7 +46,7 @@ const response = yield * LLMClient.generate(request)
 
 `LLM.request(...)` builds an `LLMRequest`. `LLMClient.generate(...)` reads the executable route carried by `request.model.route`, builds the provider-native body, asks the route's transport for a real `HttpClientRequest.HttpClientRequest`, sends it through `RequestExecutor.Service`, parses the provider stream into common `LLMEvent`s, and finally returns an `LLMResponse`.
 
-Use `LLMClient.stream(request)` when callers want incremental `LLMEvent`s. Use `LLMClient.generate(request)` when callers want those same events collected into an `LLMResponse`.
+Use `LLMClient.stream(request)` when callers want incremental `LLMEvent`s. Use `LLMClient.generate(request)` when callers want those same events collected into an `LLMResponse`. Use `LLMClient.prepare<Body>(request)` to compile a request through the route pipeline without sending it — the optional `Body` type argument narrows `.body` to the route's native shape (e.g. `prepare<OpenAIChatBody>(...)` returns a `PreparedRequestOf<OpenAIChatBody>`). The runtime body is identical; the generic is a type-level assertion.
 
 Filter or narrow `LLMEvent` streams with `LLMEvent.is.*` (camelCase guards, e.g. `events.filter(LLMEvent.is.toolCall)`). The kebab-case `LLMEvent.guards["tool-call"]` form also works but prefer `is.*` in new code.
 
@@ -138,13 +138,13 @@ packages/ai/src/
     ids.ts                  branded IDs, literal types, ProviderMetadata
     options.ts              Generation/Provider/Http options, Limits, Model, cache policy
     messages.ts             content parts, Message, ToolDefinition, LLMRequest
-    events.ts               Usage, individual events, LLMEvent, LLMResponse
+    events.ts               Usage, individual events, LLMEvent, PreparedRequest, LLMResponse
     errors.ts               error reasons, LLMError, ToolFailure
     index.ts                barrel
   llm.ts                    request constructors and convenience helpers
   route/
     index.ts                @opencode-ai/ai/route advanced barrel
-    client.ts               Route.make + LLMClient.stream/generate
+    client.ts               Route.make + LLMClient.prepare/stream/generate
     executor.ts             RequestExecutor service + transport error mapping
     protocol.ts             Protocol type + Protocol.make
     endpoint.ts             Endpoint type + Endpoint.path

packages/ai/README.md

@@ -196,6 +196,7 @@ The hosted result is represented as a provider-executed tool call and tool resul
 - **`LLM.generate` / `LLM.stream`** — re-exported from `LLMClient` for one-import use.
 - **`Message.user(...)` / `Message.assistant(...)` / `Message.tool(...)`** — message constructors from the canonical schema model.
 - **`Model.make(...)` / `ToolCallPart.make(...)` / `ToolResultPart.make(...)` / `ToolDefinition.make(...)`** — model and tool-related constructors from the canonical schema model.
+- **`LLMClient.prepare(request)`** — compile a request through protocol body construction, validation, and HTTP preparation without sending. Useful for inspection and testing.
 - **`LLMEvent.is.*`** — typed guards (`is.textDelta`, `is.toolCall`, `is.finish`, …) for filtering streams.
 - **`Image.generate({...})`** — generate images through a provider-neutral image request and response model.
 - **`ImageClient`** — Effect service and layer for image execution, parallel to `LLMClient`.

packages/ai/example/call-sites.md

@@ -568,7 +568,7 @@ App boundary = explicit durable-config -> typed-provider call
       calling `.model(...)`.
 - [x] Remove request-shaping defaults from `Model`; selected models now carry only
       id, provider, and configured route while defaults live on routes or requests.
-- [x] Rework `LLMClient.stream` / `generate` to read
+- [x] Rework `LLMClient.prepare` / `stream` / `generate` to read
       `request.model.route` directly instead of calling `registeredRoute(...)`.
 - [x] Remove `Route.make(...)` global registration from the normal execution
       path; keep route ids only as diagnostics/provider API labels.

packages/ai/example/tutorial.ts

@@ -50,6 +50,18 @@ const request = LLM.request({
   },
 })
 
+// `http` is intentionally not needed for normal calls. This shows the shape for
+// newly released provider fields before they deserve a typed provider option.
+const rawOverlayExample = LLM.request({
+  model,
+  prompt: "Show the final HTTP overlay shape.",
+  http: {
+    body: { metadata: { example: "tutorial" } },
+    headers: { "x-opencode-tutorial": "1" },
+    query: { debug: "1" },
+  },
+})
+
 // 3. `generate` sends the request and collects the event stream into one
 // response object. `response.text` is the collected text output.
 const generateOnce = Effect.gen(function* () {
@@ -210,15 +222,33 @@ const FakeEcho = {
   }),
 }
 
+// `LLMClient.prepare` is the lower-level inspection hook: it compiles through
+// body conversion, validation, endpoint, auth, and HTTP construction without
+// sending anything over the network.
+const inspectFakeProvider = Effect.gen(function* () {
+  const prepared = yield* LLMClient.prepare(
+    LLM.request({
+      model: FakeEcho.configure().model("tiny-echo"),
+      prompt: "Show me the provider pipeline.",
+    }),
+  )
+
+  console.log("\n== fake provider prepare ==")
+  console.log("route:", prepared.route)
+  console.log("body:", Formatter.formatJson(prepared.body, { space: 2 }))
+})
+
 // Provide the LLM runtime and the HTTP request executor once. Keep one path
-// enabled at a time so the tutorial can demonstrate generate, stream, or
-// tool-loop behavior without spending tokens on every example.
+// enabled at a time so the tutorial can demonstrate generate, prepare, stream,
+// or tool-loop behavior without spending tokens on every example.
 const requestExecutorLayer = RequestExecutor.fetchLayer
 const llmDeps = Layer.mergeAll(requestExecutorLayer, WebSocketExecutor.layer)
 const llmClientLayer = LLMClient.layer.pipe(Layer.provide(llmDeps))
 
 const program = Effect.gen(function* () {
   // yield* generateOnce
+  // yield* inspectFakeProvider
+  // yield* LLMClient.prepare(rawOverlayExample).pipe(Effect.andThen((prepared) => Effect.sync(() => console.log(prepared.body))))
   // yield* streamText
   // yield* generateStructuredObject
   // yield* generateDynamicObject.pipe(Effect.andThen((response) => Effect.sync(() => console.log(response.object))))

packages/ai/src/llm.ts

@@ -9,28 +9,25 @@ import {
   LLMRequest,
   LLMResponse,
   Message,
-  Model,
   SystemPart,
   ToolChoice,
   ToolDefinition,
   type ContentPart,
-  type ModelProviderOptions,
 } from "./schema"
 import { make as makeTool, toDefinitions, type ToolSchema } from "./tool"
 
 /** Input accepted by `LLM.request`, normalized into the canonical `LLMRequest` class. */
-export type RequestInput<SelectedModel extends Model = Model> = Omit<
+export type RequestInput = Omit<
   ConstructorParameters<typeof LLMRequest>[0],
-  "model" | "system" | "messages" | "tools" | "toolChoice" | "generation" | "http" | "providerOptions"
+  "system" | "messages" | "tools" | "toolChoice" | "generation" | "http" | "providerOptions"
 > & {
-  readonly model: SelectedModel
   readonly system?: string | SystemPart | ReadonlyArray<SystemPart>
   readonly prompt?: string | ContentPart | ReadonlyArray<ContentPart>
   readonly messages?: ReadonlyArray<Message | Message.Input>
   readonly tools?: ReadonlyArray<ToolDefinition.Input>
   readonly toolChoice?: ToolChoice.Input
   readonly generation?: GenerationOptions.Input
-  readonly providerOptions?: NoInfer<ModelProviderOptions<SelectedModel>>
+  readonly providerOptions?: ConstructorParameters<typeof LLMRequest>[0]["providerOptions"]
   readonly http?: HttpOptions.Input
 }
 
@@ -38,7 +35,7 @@ export const generate = LLMClient.generate
 
 export const stream = LLMClient.stream
 
-export const request = <const SelectedModel extends Model>(input: RequestInput<SelectedModel>) => {
+export const request = (input: RequestInput) => {
   const {
     system: requestSystem,
     prompt,
@@ -66,7 +63,7 @@ const GENERATE_OBJECT_TOOL_NAME = "generate_object"
 
 const GENERATE_OBJECT_TOOL_DESCRIPTION = "Return the structured result by calling this tool."
 
-type GenerateObjectBase<SelectedModel extends Model = Model> = Omit<RequestInput<SelectedModel>, "tools" | "toolChoice">
+type GenerateObjectBase = Omit<RequestInput, "tools" | "toolChoice">
 
 export class GenerateObjectResponse<T> {
   constructor(
@@ -83,13 +80,11 @@ export class GenerateObjectResponse<T> {
   }
 }
 
-export interface GenerateObjectOptions<S extends ToolSchema<any>, SelectedModel extends Model = Model>
-  extends GenerateObjectBase<SelectedModel> {
+export interface GenerateObjectOptions<S extends ToolSchema<any>> extends GenerateObjectBase {
   readonly schema: S
 }
 
-export interface GenerateObjectDynamicOptions<SelectedModel extends Model = Model>
-  extends GenerateObjectBase<SelectedModel> {
+export interface GenerateObjectDynamicOptions extends GenerateObjectBase {
   /** Raw JSON Schema object describing the expected output shape. */
   readonly jsonSchema: JsonSchema.JsonSchema
 }
@@ -142,11 +137,11 @@ const runGenerateObject = Effect.fn("LLM.generateObject")(function* (
  * 2. `jsonSchema: JsonSchema.JsonSchema` — `.object` is `unknown`. Use when
  *    the schema is only available at runtime (MCP, plugin manifests). Caller validates.
  */
-export function generateObject<const SelectedModel extends Model, S extends ToolSchema<any>>(
-  options: GenerateObjectOptions<S, SelectedModel>,
+export function generateObject<S extends ToolSchema<any>>(
+  options: GenerateObjectOptions<S>,
 ): Effect.Effect<GenerateObjectResponse<Schema.Schema.Type<S>>, LLMError>
-export function generateObject<const SelectedModel extends Model>(
-  options: GenerateObjectDynamicOptions<SelectedModel>,
+export function generateObject(
+  options: GenerateObjectDynamicOptions,
 ): Effect.Effect<GenerateObjectResponse<unknown>, LLMError>
 export function generateObject(options: GenerateObjectOptions<ToolSchema<any>> | GenerateObjectDynamicOptions) {
   if ("schema" in options) {

packages/ai/src/provider-package.ts

@@ -1,4 +1,4 @@
-import type { Model, ProviderOptions } from "./schema"
+import type { Model } from "./schema"
 
 export interface Settings extends Readonly<Record<string, unknown>> {
   readonly headers?: Readonly<Record<string, string>>
@@ -9,11 +9,8 @@ export interface Settings extends Readonly<Record<string, unknown>> {
   }
 }
 
-export interface Definition<
-  ProviderSettings extends Settings = Settings,
-  Options extends ProviderOptions = ProviderOptions,
-> {
-  readonly model: (modelID: string, settings: ProviderSettings) => Model<Options>
+export interface Definition<ProviderSettings extends Settings = Settings> {
+  readonly model: (modelID: string, settings: ProviderSettings) => Model
 }
 
 export * as ProviderPackage from "./provider-package"

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

@@ -47,7 +47,7 @@ export const configure = (input: Config) => {
   })
   return {
     id: ProviderID.make(provider),
-    model: (modelID: string | ModelID) => route.model<AnthropicMessages.ProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure,
   }
 }
@@ -57,10 +57,7 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings, AnthropicMessages.ProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   if (settings.apiKey !== undefined && settings.authToken !== undefined)
     throw new Error("Anthropic-compatible apiKey cannot be combined with authToken")
   return configure({

packages/ai/src/providers/anthropic.ts

@@ -52,10 +52,7 @@ export const configure = (input: Config = {}) => {
 }
 
 export const provider = configure()
-export const model: ProviderPackage.Definition<Settings, AnthropicMessages.ProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   if (settings.apiKey !== undefined && settings.authToken !== undefined)
     throw new Error("Anthropic apiKey cannot be combined with authToken")
   return configure({

packages/ai/src/providers/azure.ts

@@ -99,14 +99,10 @@ export const configure = (input: Config) => {
   const modelDefaults = defaults(input)
 
   const responses = (modelID: string | ModelID) =>
-    configuredResponsesRoute
-      .with(withOpenAIOptions(modelID, modelDefaults))
-      .model<OpenAIProviderOptionsInput>({ id: modelID })
+    configuredResponsesRoute.with(withOpenAIOptions(modelID, modelDefaults)).model({ id: modelID })
 
   const chat = (modelID: string | ModelID) =>
-    configuredChatRoute
-      .with(withOpenAIOptions(modelID, modelDefaults))
-      .model<OpenAIProviderOptionsInput>({ id: modelID })
+    configuredChatRoute.with(withOpenAIOptions(modelID, modelDefaults)).model({ id: modelID })
 
   return {
     id,
@@ -137,12 +133,8 @@ const config = (settings: Settings): Config => {
   throw new Error("Azure requires resourceName or baseURL")
 }
 
-export const responsesModel: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => configure(config(settings)).responses(modelID)
-export const chatModel: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => configure(config(settings)).chat(modelID)
+export const responsesModel: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) =>
+  configure(config(settings)).responses(modelID)
+export const chatModel: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) =>
+  configure(config(settings)).chat(modelID)
 export const model = responsesModel

packages/ai/src/providers/cloudflare.ts

@@ -4,7 +4,6 @@ import { Auth } from "../route/auth"
 import { AuthOptions, type AtLeastOne, type ProviderAuthOption } from "../route/auth-options"
 import type { RouteDefaultsInput } from "../route/client"
 import { ProviderID, type ModelID } from "../schema"
-import type { OpenAIProviderOptionsInput } from "./openai-options"
 
 export const aiGatewayID = ProviderID.make("cloudflare-ai-gateway")
 export const workersAIID = ProviderID.make("cloudflare-workers-ai")
@@ -21,11 +20,10 @@ type GatewayURL = AtLeastOne<{
 }
 
 export type AIGatewayOptions = GatewayURL &
-  Omit<RouteDefaultsInput, "providerOptions"> &
+  RouteDefaultsInput &
   ProviderAuthOption<"optional"> & {
     /** Cloudflare AI Gateway authentication token. Sent as `cf-aig-authorization`. */
     readonly gatewayApiKey?: CloudflareSecret
-    readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
 type WorkersAIURL = AtLeastOne<{
@@ -33,11 +31,7 @@ type WorkersAIURL = AtLeastOne<{
   readonly baseURL: string
 }>
 
-export type WorkersAIOptions = WorkersAIURL &
-  Omit<RouteDefaultsInput, "providerOptions"> &
-  ProviderAuthOption<"optional"> & {
-    readonly providerOptions?: OpenAIProviderOptionsInput
-  }
+export type WorkersAIOptions = WorkersAIURL & RouteDefaultsInput & ProviderAuthOption<"optional">
 
 export const aiGatewayBaseURL = (input: GatewayURL) => {
   if (input.baseURL) return input.baseURL
@@ -104,7 +98,7 @@ const configureAIGateway = (options: AIGatewayOptions) => {
   })
   return {
     id: aiGatewayID,
-    model: (modelID: string | ModelID) => route.model<OpenAIProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure: configureAIGateway,
   }
 }
@@ -117,7 +111,7 @@ const configureWorkersAI = (options: WorkersAIOptions) => {
   })
   return {
     id: workersAIID,
-    model: (modelID: string | ModelID) => route.model<OpenAIProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure: configureWorkersAI,
   }
 }

packages/ai/src/providers/github-copilot.ts

@@ -50,11 +50,9 @@ export const configure = (options: ModelOptions) => {
   const responsesRoute = configuredResponsesRoute(options)
   const chatRoute = configuredChatRoute(options)
   const responses = (modelID: string | ModelID) =>
-    responsesRoute
-      .with(withOpenAIOptions(modelID, defaults(options)))
-      .model<OpenAIProviderOptionsInput>({ id: modelID })
+    responsesRoute.with(withOpenAIOptions(modelID, defaults(options))).model({ id: modelID })
   const chat = (modelID: string | ModelID) =>
-    chatRoute.with(withOpenAIOptions(modelID, defaults(options))).model<OpenAIProviderOptionsInput>({ id: modelID })
+    chatRoute.with(withOpenAIOptions(modelID, defaults(options))).model({ id: modelID })
   return {
     id,
     model: (modelID: string | ModelID) =>

packages/ai/src/providers/google-vertex-chat.ts

@@ -1,9 +1,8 @@
 import type { ProviderPackage } from "../provider-package"
 import { OpenAICompatibleChat } from "../protocols/openai-compatible-chat"
 import type { RouteDefaultsInput } from "../route/client"
-import { ProviderID, type ModelID } from "../schema"
+import { ProviderID, type ModelID, type ProviderOptions } from "../schema"
 import { GoogleVertexShared } from "./google-vertex-shared"
-import type { OpenAIProviderOptionsInput } from "./openai-options"
 
 export const id = ProviderID.make("google-vertex")
 
@@ -12,7 +11,6 @@ export type Config = RouteDefaultsInput &
     readonly baseURL?: string
     readonly location?: string
     readonly project?: string
-    readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
 export interface Settings extends ProviderPackage.Settings {
@@ -21,7 +19,7 @@ export interface Settings extends ProviderPackage.Settings {
   readonly baseURL?: string
   readonly location?: string
   readonly project?: string
-  readonly providerOptions?: OpenAIProviderOptionsInput
+  readonly providerOptions?: ProviderOptions
 }
 
 const route = OpenAICompatibleChat.route.with({
@@ -58,7 +56,7 @@ export const configure = (input: Config = {}) => {
   const route = configuredRoute(input)
   return {
     id,
-    model: (modelID: string | ModelID) => route.model<OpenAIProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure,
   }
 }
@@ -68,7 +66,7 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (modelID, settings) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   if (settings.apiKey !== undefined) throw new Error("Google Vertex Chat does not support API keys")
   return configure({
     accessToken: settings.accessToken,

packages/ai/src/providers/google-vertex-messages.ts

@@ -91,7 +91,7 @@ export const configure = (input: Config = {}) => {
   const route = configuredRoute(input)
   return {
     id,
-    model: (modelID: string | ModelID) => route.model<AnthropicMessages.ProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure,
   }
 }
@@ -101,10 +101,7 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings, AnthropicMessages.ProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   if (settings.apiKey !== undefined) throw new Error("Google Vertex Messages does not support API keys")
   return configure({
     accessToken: settings.accessToken,

packages/ai/src/providers/google-vertex-responses.ts

@@ -1,9 +1,8 @@
 import type { ProviderPackage } from "../provider-package"
 import { OpenAICompatibleResponses } from "../protocols/openai-compatible-responses"
 import type { RouteDefaultsInput } from "../route/client"
-import { ProviderID, type ModelID } from "../schema"
+import { ProviderID, type ModelID, type ProviderOptions } from "../schema"
 import { GoogleVertexShared } from "./google-vertex-shared"
-import type { OpenResponsesProviderOptionsInput } from "./open-responses-options"
 
 export const id = ProviderID.make("google-vertex")
 
@@ -12,7 +11,6 @@ export type Config = RouteDefaultsInput &
     readonly baseURL?: string
     readonly location?: string
     readonly project?: string
-    readonly providerOptions?: OpenResponsesProviderOptionsInput
   }
 
 export interface Settings extends ProviderPackage.Settings {
@@ -21,7 +19,7 @@ export interface Settings extends ProviderPackage.Settings {
   readonly baseURL?: string
   readonly location?: string
   readonly project?: string
-  readonly providerOptions?: OpenResponsesProviderOptionsInput
+  readonly providerOptions?: ProviderOptions
 }
 
 const route = OpenAICompatibleResponses.route.with({
@@ -60,7 +58,7 @@ export const configure = (input: Config = {}) => {
   const route = configuredRoute(input)
   return {
     id,
-    model: (modelID: string | ModelID) => route.model<OpenResponsesProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure,
   }
 }
@@ -70,10 +68,7 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings, OpenResponsesProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   if (settings.apiKey !== undefined) throw new Error("Google Vertex Responses does not support API keys")
   return configure({
     accessToken: settings.accessToken,

packages/ai/src/providers/google-vertex.ts

@@ -77,8 +77,7 @@ const configuredRoute = (input: Config, modelID: string | ModelID) => {
 export const configure = (input: Config = {}) => {
   return {
     id,
-    model: (modelID: string | ModelID) =>
-      configuredRoute(input, modelID).model<Gemini.ProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => configuredRoute(input, modelID).model({ id: modelID }),
     configure,
   }
 }
@@ -87,10 +86,7 @@ export const provider = {
   id,
   configure,
 }
-export const model: ProviderPackage.Definition<Settings, Gemini.ProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   if (settings.apiKey !== undefined && settings.accessToken !== undefined)
     throw new Error("Google Vertex apiKey cannot be combined with accessToken or auth")
   return configure({

packages/ai/src/providers/google.ts

@@ -50,14 +50,14 @@ export const configure = (input: Config = {}) => {
     })
   return {
     id,
-    model: (modelID: string | ModelID) => route.model<Gemini.ProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     image,
     configure,
   }
 }
 
 export const provider = configure()
-export const model: ProviderPackage.Definition<Settings, Gemini.ProviderOptionsInput>["model"] = (modelID, settings) =>
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) =>
   configure({
     apiKey: settings.apiKey,
     baseURL: settings.baseURL,

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

@@ -36,7 +36,7 @@ export const configure = (input: Config) => {
   })
   return {
     id: ProviderID.make(provider),
-    model: (modelID: string | ModelID) => route.model<OpenResponsesProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure,
   }
 }
@@ -46,10 +46,7 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings, OpenResponsesProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) =>
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) =>
   configure({
     apiKey: settings.apiKey,
     baseURL: settings.baseURL,

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

@@ -4,15 +4,13 @@ import type { RouteDefaultsInput } from "../route/client"
 import { AuthOptions, type ProviderAuthOption } from "../route/auth-options"
 import type { ProviderPackage } from "../provider-package"
 import { profiles, type OpenAICompatibleProfile } from "./openai-compatible-profile"
-import type { OpenAIProviderOptionsInput } from "./openai-options"
 
 export const id = ProviderID.make("openai-compatible")
 
-type GenericModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
+type GenericModelOptions = RouteDefaultsInput &
   ProviderAuthOption<"optional"> & {
     readonly provider?: string
     readonly baseURL: string
-    readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
 export interface Settings extends ProviderPackage.Settings {
@@ -21,10 +19,9 @@ export interface Settings extends ProviderPackage.Settings {
   readonly provider?: string
 }
 
-export type FamilyModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
+export type FamilyModelOptions = RouteDefaultsInput &
   ProviderAuthOption<"optional"> & {
     readonly baseURL?: string
-    readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
 export const routes = [OpenAICompatibleChat.route]
@@ -40,8 +37,7 @@ export const configure = (input: GenericModelOptions) => {
   })
   return {
     id: ProviderID.make(provider),
-    model: (modelID: string | ModelID) =>
-      route.model<OpenAIProviderOptionsInput>({ id: modelID, provider: ProviderID.make(provider) }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID, provider: ProviderID.make(provider) }),
     configure,
   }
 }
@@ -67,7 +63,7 @@ export const provider = {
   configure,
 }
 
-export const model: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (modelID, settings) =>
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) =>
   configure({
     apiKey: settings.apiKey,
     baseURL: settings.baseURL,

packages/ai/src/providers/openai.ts

@@ -86,15 +86,10 @@ export const configure = (input: Config = {}) => {
   const chatRoute = configuredRoute(OpenAIChat.route, input)
   const modelDefaults = defaults(input)
   const responses = (id: string | ModelID) =>
-    responsesRoute
-      .with(withOpenAIOptions(id, modelDefaults, { textVerbosity: true }))
-      .model<OpenAIProviderOptionsInput>({ id })
+    responsesRoute.with(withOpenAIOptions(id, modelDefaults, { textVerbosity: true })).model({ id })
   const responsesWebSocket = (id: string | ModelID) =>
-    responsesWebSocketRoute
-      .with(withOpenAIOptions(id, modelDefaults, { textVerbosity: true }))
-      .model<OpenAIProviderOptionsInput>({ id })
-  const chat = (id: string | ModelID) =>
-    chatRoute.with(withOpenAIOptions(id, modelDefaults)).model<OpenAIProviderOptionsInput>({ id })
+    responsesWebSocketRoute.with(withOpenAIOptions(id, modelDefaults, { textVerbosity: true })).model({ id })
+  const chat = (id: string | ModelID) => chatRoute.with(withOpenAIOptions(id, modelDefaults)).model({ id })
   const image = (modelID: string | ModelID) =>
     OpenAIImages.model({
       id: modelID,
@@ -137,17 +132,15 @@ const config = (settings: Settings): Config => {
   }
 }
 
-export const model: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (modelID, settings) => {
+export const model: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) => {
   const configured = configure(config(settings))
   if (settings.transport === undefined || settings.transport === "http") return configured.responses(modelID)
   if (settings.transport === "websocket") return configured.responsesWebSocket(modelID)
   throw new Error(`Unsupported OpenAI Responses transport: ${String(settings.transport)}`)
 }
 
-export const chatModel: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) => configure(config(settings)).chat(modelID)
+export const chatModel: ProviderPackage.Definition<Settings>["model"] = (modelID, settings) =>
+  configure(config(settings)).chat(modelID)
 export const responses = provider.responses
 export const responsesWebSocket = provider.responsesWebSocket
 export const chat = provider.chat

packages/ai/src/providers/openrouter.ts

@@ -5,7 +5,6 @@ import { Framing } from "../route/framing"
 import { Protocol } from "../route/protocol"
 import { AuthOptions, type ProviderAuthOption } from "../route/auth-options"
 import { ProviderID, type ModelID, type ProviderOptions } from "../schema"
-import type { ProviderPackage } from "../provider-package"
 import * as OpenAICompatibleProfiles from "./openai-compatible-profile"
 import * as OpenAIChat from "../protocols/openai-chat"
 import { isRecord } from "../protocols/shared"
@@ -31,12 +30,6 @@ export type ModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
     readonly providerOptions?: OpenRouterProviderOptionsInput
   }
 
-export interface Settings extends ProviderPackage.Settings {
-  readonly apiKey?: string
-  readonly baseURL?: string
-  readonly providerOptions?: OpenRouterProviderOptionsInput
-}
-
 const OpenRouterBody = Schema.StructWithRest(Schema.Struct(OpenAIChat.bodyFields), [
   Schema.Record(Schema.String, Schema.Any),
 ])
@@ -114,21 +107,10 @@ export const configure = (input: ModelOptions = {}) => {
   const route = configuredRoute(input)
   return {
     id,
-    model: (modelID: string | ModelID) => route.model<OpenRouterProviderOptionsInput>({ id: modelID }),
+    model: (modelID: string | ModelID) => route.model({ id: modelID }),
     configure,
   }
 }
 
 export const provider = configure()
-export const model: ProviderPackage.Definition<Settings, OpenRouterProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) =>
-  configure({
-    apiKey: settings.apiKey,
-    baseURL: settings.baseURL,
-    headers: settings.headers,
-    http: settings.body === undefined ? undefined : { body: { ...settings.body } },
-    limits: settings.limits,
-    providerOptions: settings.providerOptions,
-  }).model(modelID)
+export const model = provider.model

packages/ai/src/providers/xai.ts

@@ -5,23 +5,14 @@ import * as OpenAICompatibleProfiles from "./openai-compatible-profile"
 import * as OpenAICompatibleChat from "../protocols/openai-compatible-chat"
 import * as OpenAIResponses from "../protocols/openai-responses"
 import { XAIImages } from "../protocols/xai-images"
-import type { OpenAIProviderOptionsInput } from "./openai-options"
-import type { ProviderPackage } from "../provider-package"
 
 export const id = ProviderID.make("xai")
 
-export type ModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
+export type ModelOptions = RouteDefaultsInput &
   ProviderAuthOption<"optional"> & {
     readonly baseURL?: string
-    readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
-export interface Settings extends ProviderPackage.Settings {
-  readonly apiKey?: string
-  readonly baseURL?: string
-  readonly providerOptions?: OpenAIProviderOptionsInput
-}
-
 export type { XAIImageOptions } from "../protocols/xai-images"
 
 export const routes = [OpenAIResponses.route, OpenAICompatibleChat.route]
@@ -51,8 +42,8 @@ const configuredChatRoute = (input: ModelOptions) => {
 export const configure = (input: ModelOptions = {}) => {
   const responsesRoute = configuredResponsesRoute(input)
   const chatRoute = configuredChatRoute(input)
-  const responses = (modelID: string | ModelID) => responsesRoute.model<OpenAIProviderOptionsInput>({ id: modelID })
-  const chat = (modelID: string | ModelID) => chatRoute.model<OpenAIProviderOptionsInput>({ id: modelID })
+  const responses = (modelID: string | ModelID) => responsesRoute.model({ id: modelID })
+  const chat = (modelID: string | ModelID) => chatRoute.model({ id: modelID })
   const image = (modelID: string | ModelID) =>
     XAIImages.model({
       id: modelID,
@@ -72,15 +63,7 @@ export const configure = (input: ModelOptions = {}) => {
 }
 
 export const provider = configure()
-export const model: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (modelID, settings) =>
-  configure({
-    apiKey: settings.apiKey,
-    baseURL: settings.baseURL,
-    headers: settings.headers,
-    http: settings.body === undefined ? undefined : { body: { ...settings.body } },
-    limits: settings.limits,
-    providerOptions: settings.providerOptions,
-  }).model(modelID)
+export const model = provider.model
 export const responses = provider.responses
 export const chat = provider.chat
 export const image = provider.image

packages/ai/src/route/client.ts

@@ -10,7 +10,7 @@ import { WebSocketExecutor } from "./transport"
 import type { Protocol } from "./protocol"
 import { applyCachePolicy } from "../cache-policy"
 import * as ProviderShared from "../protocols/shared"
-import type { LLMError, ProtocolID, ProviderOptions } from "../schema"
+import type { LLMError, PreparedRequestOf, ProtocolID, ProviderOptions } from "../schema"
 import {
   GenerationOptions,
   HttpOptions,
@@ -20,6 +20,7 @@ import {
   ModelLimits,
   LLMError as LLMErrorClass,
   LLMEvent,
+  PreparedRequest,
   ProviderID,
   mergeGenerationOptions,
   mergeHttpOptions,
@@ -45,7 +46,7 @@ export interface Route<Body, Prepared = unknown> {
   readonly defaults: RouteDefaults
   readonly body: RouteBody<Body>
   readonly with: (patch: RoutePatch<Body, Prepared>) => Route<Body, Prepared>
-  readonly model: <Options extends ProviderOptions = ProviderOptions>(input: RouteMappedModelInput) => Model<Options>
+  readonly model: (input: RouteMappedModelInput) => Model
   readonly prepareTransport: (body: Body, request: LLMRequest) => Effect.Effect<Prepared, LLMError>
   readonly streamPrepared: (
     prepared: Prepared,
@@ -92,12 +93,12 @@ export interface RoutePatch<Body, Prepared> extends RouteDefaultsInput {
 
 type RouteMappedModelInput = RouteModelInput | RouteRoutedModelInput
 
-const makeRouteModel = <Options extends ProviderOptions = ProviderOptions>(route: AnyRoute, mapped: RouteMappedModelInput) => {
+const makeRouteModel = (route: AnyRoute, mapped: RouteMappedModelInput) => {
   const provider = route.provider ?? ("provider" in mapped ? mapped.provider : undefined)
   if (!provider) throw new Error(`Route.model(${route.id}) requires a provider`)
   if (!endpointBaseURL(route.endpoint))
     throw new Error(`Route.model(${route.id}) requires an endpoint baseURL — configure it on the route first`)
-  return Model.make<Options>({
+  return Model.make({
     ...mapped,
     provider,
     route,
@@ -141,6 +142,17 @@ export const httpOptions = (input: HttpOptionsInput | undefined) => {
 }
 
 export interface Interface {
+  /**
+   * Compile a request through protocol body construction, validation, and HTTP
+   * preparation without sending it. Returns the prepared request including the
+   * provider-native body.
+   *
+   * Pass a `Body` type argument to statically expose the route's body
+   * shape (e.g. `prepare<OpenAIChatBody>(...)`) — the runtime body is
+   * identical, so this is a type-level assertion the caller makes about which
+   * route the request will resolve to.
+   */
+  readonly prepare: <Body = unknown>(request: LLMRequest) => Effect.Effect<PreparedRequestOf<Body>, LLMError>
   readonly stream: StreamMethod
   readonly generate: GenerateMethod
 }
@@ -284,8 +296,7 @@ function makeFromTransport<Body, Prepared, Frame, Event, State>(
           defaults: mergeRouteDefaults(route.defaults, defaults),
         })
       },
-      model: <Options extends ProviderOptions = ProviderOptions>(input: RouteMappedModelInput) =>
-        makeRouteModel<Options>(route, input),
+      model: (input) => makeRouteModel(route, input),
       prepareTransport: (body, request) =>
         routeInput.transport.prepare({
           body,
@@ -359,6 +370,9 @@ export function make<Body, Prepared, Frame, Event, State>(
   })
 }
 
+// `compile` is the important boundary: it turns a common `LLMRequest` into a
+// validated provider body plus transport-private prepared data, but does not
+// execute transport.
 const compile = Effect.fn("LLM.compile")(function* (request: LLMRequest) {
   const resolved = applyCachePolicy(resolveRequestOptions(request))
   const route = resolved.model.route
@@ -376,17 +390,17 @@ const compile = Effect.fn("LLM.compile")(function* (request: LLMRequest) {
   }
 })
 
-/** @internal Test-only projection of the execution compiler; not exported from package barrels. */
-export const compileRequest = Effect.fn("LLM.compileRequest")(function* (request: LLMRequest) {
+const prepareWith = Effect.fn("LLMClient.prepare")(function* (request: LLMRequest) {
   const compiled = yield* compile(request)
-  return {
+
+  return new PreparedRequest({
     id: compiled.request.id ?? "request",
     route: compiled.route.id,
     protocol: compiled.route.protocol,
     model: compiled.request.model,
     body: compiled.body,
     metadata: { transport: compiled.route.transport.id },
-  }
+  })
 })
 
 const streamRequestWith = (runtime: TransportRuntime) => (request: LLMRequest) =>
@@ -408,6 +422,9 @@ const generateWith = (stream: Interface["stream"]) =>
     )
   })
 
+export const prepare = <Body = unknown>(request: LLMRequest) =>
+  prepareWith(request) as Effect.Effect<PreparedRequestOf<Body>, LLMError>
+
 export function stream(request: LLMRequest): Stream.Stream<LLMEvent, LLMError> {
   return Stream.unwrap(
     Effect.gen(function* () {
@@ -436,7 +453,7 @@ export const layer: Layer.Layer<Service, never, RequestExecutor.Service> = Layer
       http: yield* RequestExecutor.Service,
       webSocket: Option.getOrUndefined(yield* Effect.serviceOption(WebSocketExecutor.Service)),
     })
-    return Service.of({ stream, generate: generateWith(stream) })
+    return Service.of({ prepare: prepareWith as Interface["prepare"], stream, generate: generateWith(stream) })
   }),
 )
 
@@ -445,6 +462,7 @@ export const Route = { make } as const
 export const LLMClient = {
   Service,
   layer,
+  prepare,
   stream,
   generate,
 } as const

packages/ai/src/schema/events.ts

@@ -1,5 +1,6 @@
 import { Schema } from "effect"
-import { ContentBlockID, FinishReason, ProviderMetadata, ToolCallID } from "./ids"
+import { ContentBlockID, FinishReason, ProtocolID, ProviderMetadata, RouteID, ToolCallID } from "./ids"
+import { ModelSchema } from "./options"
 import { Message, ToolCallPart, ToolOutput, ToolResultPart, ToolResultValue, type ContentPart } from "./messages"
 import { ProviderFailureClassification } from "./errors"
 
@@ -313,6 +314,29 @@ export const LLMEvent = Object.assign(llmEventTagged, {
 })
 export type LLMEvent = Schema.Schema.Type<typeof llmEventTagged>
 
+export class PreparedRequest extends Schema.Class<PreparedRequest>("LLM.PreparedRequest")({
+  id: Schema.String,
+  route: RouteID,
+  protocol: ProtocolID,
+  model: ModelSchema,
+  body: Schema.Unknown,
+  metadata: Schema.optional(Schema.Record(Schema.String, Schema.Unknown)),
+}) {}
+
+/**
+ * A `PreparedRequest` whose `body` is typed as `Body`. Use with the generic
+ * on `LLMClient.prepare<Body>(...)` when the caller knows which route their
+ * request will resolve to and wants its native shape statically exposed
+ * (debug UIs, request previews, plan rendering).
+ *
+ * The runtime body is identical — the route still emits `body: unknown` — so
+ * this is a type-level assertion the caller makes about what they expect to
+ * find. The prepare runtime does not validate the assertion.
+ */
+export type PreparedRequestOf<Body> = Omit<PreparedRequest, "body"> & {
+  readonly body: Body
+}
+
 const responseText = (events: ReadonlyArray<LLMEvent>) =>
   events
     .filter(LLMEvent.is.textDelta)

packages/ai/src/schema/options.ts

@@ -178,8 +178,7 @@ export namespace ModelCompatibility {
   export const make = (input: Input) => (input instanceof ModelCompatibility ? input : new ModelCompatibility(input))
 }
 
-export class Model<Options extends ProviderOptions = ProviderOptions> {
-  declare protected readonly _ProviderOptions: Options
+export class Model {
   readonly id: ModelID
   readonly provider: ProviderID
   readonly route: AnyRoute
@@ -194,8 +193,8 @@ export class Model<Options extends ProviderOptions = ProviderOptions> {
     this.compatibility = input.compatibility
   }
 
-  static make<Options extends ProviderOptions = ProviderOptions>(input: Model.Input) {
-    return new Model<Options>({
+  static make(input: Model.Input) {
+    return new Model({
       id: ModelID.make(input.id),
       provider: ProviderID.make(input.provider),
       route: input.route,
@@ -204,7 +203,7 @@ export class Model<Options extends ProviderOptions = ProviderOptions> {
     })
   }
 
-  static input<Options extends ProviderOptions>(model: Model<Options>): Model.ConstructorInput {
+  static input(model: Model): Model.ConstructorInput {
     return {
       id: model.id,
       provider: model.provider,
@@ -214,9 +213,9 @@ export class Model<Options extends ProviderOptions = ProviderOptions> {
     }
   }
 
-  static update<Options extends ProviderOptions>(model: Model<Options>, patch: Partial<Model.Input>) {
+  static update(model: Model, patch: Partial<Model.Input>) {
     if (Object.keys(patch).length === 0) return model
-    return Model.make<Options>({
+    return Model.make({
       ...Model.input(model),
       ...patch,
     })
@@ -242,8 +241,6 @@ export namespace Model {
 
 export type ModelInput = Model.Input
 
-export type ModelProviderOptions<SelectedModel> = SelectedModel extends Model<infer Options> ? Options : never
-
 export const ModelSchema = Schema.declare((value): value is Model => value instanceof Model, { expected: "LLM.Model" })
 
 export class CacheHint extends Schema.Class<CacheHint>("LLM.CacheHint")({

packages/ai/src/testing.ts

@@ -99,6 +99,7 @@ export const layer = (options: LayerOptions = {}) =>
         )
       }) as LLMClientShape["stream"]
       const client = LLMClient.Service.of({
+        prepare: () => Effect.die("TestLLM does not prepare provider-native requests"),
         stream,
         generate: (request) =>
           stream(request).pipe(

packages/ai/test/adapter.test.ts

@@ -2,7 +2,6 @@ import { describe, expect } from "bun:test"
 import { Effect, Schema, Stream } from "effect"
 import { LLM, LLMRequest, LLMResponse } from "../src"
 import { Route, Endpoint, LLMClient, Protocol, type FramingDef } from "../src/route"
-import { compileRequest } from "../src/route/client"
 import { Model } from "../src/schema"
 import { testEffect } from "./lib/effect"
 import { dynamicResponse } from "./lib/http"
@@ -140,7 +139,8 @@ describe("llm route", () => {
 
   it.effect("selects routes by model route value", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const llm = yield* LLMClient.Service
+      const prepared = yield* llm.prepare(
         LLMRequest.update(request, { model: updateModel(request.model, { route: configuredGemini }) }),
       )
 
@@ -173,7 +173,7 @@ describe("llm route", () => {
         framing: fakeFraming,
       })
 
-      const prepared = yield* compileRequest(
+      const prepared = yield* (yield* LLMClient.Service).prepare(
         LLMRequest.update(request, { model: updateModel(request.model, { route: duplicate }) }),
       )
 

packages/ai/test/cache-policy.test.ts

@@ -1,8 +1,7 @@
 import { describe, expect, test } from "bun:test"
 import { Effect } from "effect"
 import { CacheHint, LLM, Message } from "../src"
-import { Auth } from "../src/route"
-import { compileRequest } from "../src/route/client"
+import { Auth, LLMClient } from "../src/route"
 import { AmazonBedrock } from "../src/providers"
 import * as AnthropicMessages from "../src/protocols/anthropic-messages"
 import * as Gemini from "../src/protocols/gemini"
@@ -32,7 +31,7 @@ const geminiModel = Gemini.route
 describe("applyCachePolicy", () => {
   it.effect("undefined cache resolves to 'auto' (the recommended default)", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           system: "You are concise.",
@@ -51,7 +50,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("'auto' marks the last tool, first and last system parts, and final message boundary on Anthropic", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           system: [
@@ -88,7 +87,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("'auto' is a no-op on OpenAI (implicit caching protocol)", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: openaiModel,
           system: "Sys",
@@ -107,7 +106,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("'auto' is a no-op on Gemini (out-of-band caching protocol)", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: geminiModel,
           system: "Sys",
@@ -124,7 +123,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("'auto' on Bedrock emits cachePoint markers in the right places", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: bedrockModel,
           system: [
@@ -158,7 +157,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("'none' disables auto placement even when manual hints exist", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           system: "Sys",
@@ -177,7 +176,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("granular object form: tools-only marks just tools", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           system: "Sys",
@@ -196,7 +195,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("auto policy preserves manual CacheHints on other parts", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           system: [
@@ -242,7 +241,7 @@ describe("applyCachePolicy", () => {
       expect("cache" in tail ? tail.cache : undefined).toBeUndefined()
       expect(applyCachePolicy(applied)).toBe(applied)
 
-      const prepared = yield* compileRequest(request)
+      const prepared = yield* LLMClient.prepare(request)
 
       const body = prepared.body as {
         tools: Array<{ cache_control?: unknown }>
@@ -262,7 +261,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("ttlSeconds in the policy flows through to wire markers", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           system: "Sys",
@@ -279,7 +278,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("messages: { tail: 2 } marks the last 2 message boundaries", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           messages: [Message.user("u1"), Message.assistant("a1"), Message.user("u2"), Message.assistant("a2")],
@@ -297,7 +296,7 @@ describe("applyCachePolicy", () => {
 
   it.effect("'latest-assistant' marks the last assistant message", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: anthropicModel,
           messages: [Message.user("u1"), Message.assistant("a1"), Message.user("u2")],

packages/ai/test/exports.test.ts

@@ -53,7 +53,9 @@ describe("public exports", () => {
     expect(CloudflareWorkersAI.configure).toBeFunction()
     expect(CloudflareWorkersAI.configure({ accountId: "fixture", apiKey: "fixture" }).model).toBeFunction()
     expect(OpenRouter.model).toBeFunction()
+    expect(OpenRouter.provider.model).toBe(OpenRouter.model)
     expect(XAI.model).toBeFunction()
+    expect(XAI.provider.model).toBe(XAI.model)
     expect(XAI.provider.responses).toBe(XAI.responses)
     expect(XAI.provider.chat).toBe(XAI.chat)
     expect(XAI.configure({ apiKey: "fixture" }).responses("grok-4.3").route.id).toBe("openai-responses")

packages/ai/test/llm-option-types.types.ts

@@ -1,47 +0,0 @@
-import { Schema } from "effect"
-import { LLM, type Model, type ModelProviderOptions, type ProviderOptions } from "../src"
-import { OpenAIChat } from "../src/protocols"
-
-interface ExampleOptions {
-  readonly [key: string]: unknown
-  readonly mode?: "fast" | "thorough"
-}
-
-type ExampleProviderOptions = ProviderOptions & {
-  readonly example?: ExampleOptions
-}
-
-const model = OpenAIChat.route
-  .with({ endpoint: { baseURL: "https://example.com/v1" } })
-  .model<ExampleProviderOptions>({ id: "example" })
-
-LLM.request({ model, prompt: "Hello", providerOptions: { example: { mode: "fast" } } })
-LLM.request({ model, prompt: "Hello", providerOptions: { future: { option: true } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Known provider options preserve their value types.
-  providerOptions: { example: { mode: "slow" } },
-})
-
-LLM.generateObject({
-  model,
-  prompt: "Hello",
-  schema: Schema.Struct({ answer: Schema.String }),
-  providerOptions: { example: { mode: "thorough" } },
-})
-
-LLM.generateObject({
-  model,
-  prompt: "Hello",
-  jsonSchema: { type: "object" },
-  // @ts-expect-error Dynamic object generation uses the selected model's provider options.
-  providerOptions: { example: { mode: false } },
-})
-
-declare const generic: Model
-LLM.request({ model: generic, prompt: "Hello", providerOptions: { arbitrary: { option: true } } })
-
-const options: ModelProviderOptions<typeof model> = { example: { mode: "fast" } }
-void options

packages/ai/test/prepare.test.ts

@@ -4,7 +4,6 @@ import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, mergeProviderOptions } from "../src"
 import { AnthropicMessages, OpenAIChat } from "../src/protocols"
 import { Auth, LLMClient } from "../src/route"
-import { compileRequest } from "../src/route/client"
 import { it } from "./lib/effect"
 import { dynamicResponse } from "./lib/http"
 import { deltaChunk } from "./lib/openai-chunks"
@@ -45,7 +44,7 @@ describe("request option precedence", () => {
     })
   })
 
-  it.effect("compiles bodies with route defaults, model defaults, and call options in order", () =>
+  it.effect("prepares bodies with route defaults, model defaults, and call options in order", () =>
     Effect.gen(function* () {
       const route = OpenAIChat.route.with({
         endpoint: { baseURL: "https://api.openai.test/v1/" },
@@ -60,7 +59,7 @@ describe("request option precedence", () => {
           providerOptions: { openai: { reasoningEffort: "medium" } },
         },
       })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           prompt: "Say hello.",
@@ -142,7 +141,7 @@ describe("request option precedence", () => {
       const model = OpenAIChat.route
         .with({ endpoint: { baseURL: "https://api.openai.test/v1/" }, auth: Auth.bearer("test") })
         .model({ id: "gpt-4o-mini" })
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model,
           prompt: "Say hello.",
@@ -165,8 +164,10 @@ describe("request option precedence", () => {
         limits: { output: 128 },
       })
       const model = route.model({ id: "claude-sonnet-4-5", defaults: { limits: { output: 64 } } })
-      const withoutMaxTokens = yield* compileRequest(LLM.request({ model, prompt: "Say hello.", cache: "none" }))
-      const withMaxTokens = yield* compileRequest(
+      const withoutMaxTokens = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
+        LLM.request({ model, prompt: "Say hello.", cache: "none" }),
+      )
+      const withMaxTokens = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({ model, prompt: "Say hello.", cache: "none", generation: { maxTokens: 32 } }),
       )
 

packages/ai/test/provider-options/anthropic-compatible.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { AnthropicCompatible } from "../../src/providers"
-
-const model = AnthropicCompatible.configure({ baseURL: "https://example.com" }).model("claude")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { anthropic: { effort: "high" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Anthropic effort must be a string.
-  providerOptions: { anthropic: { effort: 1 } },
-})

packages/ai/test/provider-options/anthropic.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { Anthropic } from "../../src/providers"
-
-const model = Anthropic.provider.model("claude-sonnet-4-5")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { anthropic: { thinking: { type: "adaptive" } } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Anthropic thinking modes are a fixed union.
-  providerOptions: { anthropic: { thinking: { type: "automatic" } } },
-})

packages/ai/test/provider-options/azure.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { Azure } from "../../src/providers"
-
-const model = Azure.configure({ resourceName: "example" }).responses("deployment")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { store: false } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Azure OpenAI store must be boolean.
-  providerOptions: { openai: { store: "false" } },
-})

packages/ai/test/provider-options/cloudflare.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { CloudflareWorkersAI } from "../../src/providers"
-
-const model = CloudflareWorkersAI.configure({ accountId: "account", apiKey: "test" }).model("model")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { promptCacheKey: "cache" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Cloudflare's OpenAI-compatible prompt cache key must be a string.
-  providerOptions: { openai: { promptCacheKey: 1 } },
-})

packages/ai/test/provider-options/github-copilot.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { GitHubCopilot } from "../../src/providers"
-
-const model = GitHubCopilot.configure({ baseURL: "https://example.com" }).model("gpt-5")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { reasoningSummary: "auto" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Copilot reasoning summaries use the OpenAI union.
-  providerOptions: { openai: { reasoningSummary: "full" } },
-})

packages/ai/test/provider-options/google-vertex-chat.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { GoogleVertexChat } from "../../src/providers"
-
-const model = GoogleVertexChat.configure({ accessToken: "test", project: "project" }).model("gemini")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { serviceTier: "priority" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Vertex OpenAI-compatible service tiers use the OpenAI union.
-  providerOptions: { openai: { serviceTier: "premium" } },
-})

packages/ai/test/provider-options/google-vertex-messages.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { GoogleVertexMessages } from "../../src/providers"
-
-const model = GoogleVertexMessages.configure({ accessToken: "test", project: "project" }).model("claude")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { anthropic: { effort: "medium" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Vertex Anthropic effort must be a string.
-  providerOptions: { anthropic: { effort: false } },
-})

packages/ai/test/provider-options/google-vertex-responses.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { GoogleVertexResponses } from "../../src/providers"
-
-const model = GoogleVertexResponses.configure({ accessToken: "test", project: "project" }).model("gemini")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openresponses: { textVerbosity: "high" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Vertex Responses verbosity uses the Open Responses union.
-  providerOptions: { openresponses: { textVerbosity: "verbose" } },
-})

packages/ai/test/provider-options/google-vertex.types.ts

@@ -1,17 +0,0 @@
-import { LLM } from "../../src"
-import { GoogleVertex } from "../../src/providers"
-
-const model = GoogleVertex.provider.configure({ apiKey: "test" }).model("gemini-2.5-pro")
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  providerOptions: { gemini: { thinkingConfig: { includeThoughts: true } } },
-})
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Vertex Gemini includeThoughts must be boolean.
-  providerOptions: { gemini: { thinkingConfig: { includeThoughts: "yes" } } },
-})

packages/ai/test/provider-options/google.types.ts

@@ -1,17 +0,0 @@
-import { LLM } from "../../src"
-import { Google } from "../../src/providers"
-
-const model = Google.provider.model("gemini-2.5-pro")
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  providerOptions: { gemini: { thinkingConfig: { thinkingBudget: 1024 } } },
-})
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Gemini thinking budgets must be numeric.
-  providerOptions: { gemini: { thinkingConfig: { thinkingBudget: "large" } } },
-})

packages/ai/test/provider-options/openai-compatible-responses.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { OpenAICompatibleResponses } from "../../src/providers"
-
-const model = OpenAICompatibleResponses.configure({ baseURL: "https://example.com" }).model("model")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openresponses: { reasoningSummary: "detailed" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error Open Responses reasoning summaries use a fixed union.
-  providerOptions: { openresponses: { reasoningSummary: "full" } },
-})

packages/ai/test/provider-options/openai-compatible.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { OpenAICompatible } from "../../src/providers"
-
-const model = OpenAICompatible.deepseek.model("deepseek-chat")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { store: false } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error OpenAI-compatible store must be boolean.
-  providerOptions: { openai: { store: "false" } },
-})

packages/ai/test/provider-options/openai.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { OpenAI } from "../../src/providers"
-
-const model = OpenAI.responses("gpt-5")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { reasoningEffort: "high" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error OpenAI reasoning effort must be a string.
-  providerOptions: { openai: { reasoningEffort: 1 } },
-})

packages/ai/test/provider-options/openrouter.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { OpenRouter } from "../../src/providers"
-
-const model = OpenRouter.provider.model("anthropic/claude-sonnet-4.5")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openrouter: { usage: true } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error OpenRouter usage must be boolean or an option record.
-  providerOptions: { openrouter: { usage: "yes" } },
-})

packages/ai/test/provider-options/xai.types.ts

@@ -1,13 +0,0 @@
-import { LLM } from "../../src"
-import { XAI } from "../../src/providers"
-
-const model = XAI.provider.model("grok-4")
-
-LLM.request({ model, prompt: "Hello", providerOptions: { openai: { reasoningEffort: "high" } } })
-
-LLM.request({
-  model,
-  prompt: "Hello",
-  // @ts-expect-error xAI's OpenAI-compatible reasoning effort must be a string.
-  providerOptions: { openai: { reasoningEffort: true } },
-})

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

@@ -21,8 +21,6 @@ describe("provider package entrypoints", () => {
       import("@opencode-ai/ai/providers/google-vertex/chat"),
       import("@opencode-ai/ai/providers/google-vertex/responses"),
       import("@opencode-ai/ai/providers/google-vertex/messages"),
-      import("@opencode-ai/ai/providers/openrouter"),
-      import("@opencode-ai/ai/providers/xai"),
     ])
 
     for (const module of modules) expect(module.model).toBeFunction()
@@ -31,35 +29,6 @@ describe("provider package entrypoints", () => {
     expect(modules[12].model).toBe(modules[13].model)
   })
 
-  test("maps OpenRouter and xAI package settings onto executable models", async () => {
-    const OpenRouter = await import("@opencode-ai/ai/providers/openrouter")
-    const XAI = await import("@opencode-ai/ai/providers/xai")
-    const settings = {
-      apiKey: "fixture",
-      baseURL: "https://provider.example.test/v1",
-      headers: { "x-application": "opencode" },
-      body: { service_tier: "priority" },
-      limits: { context: 200_000, output: 64_000 },
-    }
-    const openrouter = OpenRouter.model("anthropic/claude-sonnet-4", {
-      ...settings,
-      providerOptions: { openrouter: { usage: true } },
-    })
-    const xai = XAI.model("grok-4", {
-      ...settings,
-      providerOptions: { openai: { reasoningEffort: "high" } },
-    })
-
-    for (const selected of [openrouter, xai]) {
-      expect(selected.route.endpoint.baseURL).toBe(settings.baseURL)
-      expect(selected.route.defaults.headers).toEqual(settings.headers)
-      expect(selected.route.defaults.http?.body).toEqual(settings.body)
-      expect(selected.route.defaults.limits).toEqual(settings.limits)
-    }
-    expect(openrouter.route.defaults.providerOptions).toEqual({ openrouter: { usage: true } })
-    expect(xai.route.defaults.providerOptions).toEqual({ openai: { reasoningEffort: "high", store: false } })
-  })
-
   test("maps package settings onto the executable model", () => {
     const selected = model("gpt-5", {
       apiKey: "fixture",

packages/ai/test/provider/anthropic-messages.test.ts

@@ -3,7 +3,6 @@ import { Effect } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { CacheHint, LLM, LLMError, LLMRequest, Message, ToolCallPart, ToolDefinition, Usage } from "../../src"
 import { Auth, LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import * as AnthropicMessages from "../../src/protocols/anthropic-messages"
 import { continuationRequest, nativeAnthropicMessagesContinuation } from "../continuation-scenarios"
 import { it } from "../lib/effect"
@@ -45,7 +44,7 @@ const expectToolResult = (body: AnthropicMessages.AnthropicMessagesBody): Anthro
 describe("Anthropic Messages route", () => {
   it.effect("prepares Anthropic Messages target", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(request)
+      const prepared = yield* LLMClient.prepare(request)
 
       expect(prepared.body).toEqual({
         model: "claude-sonnet-4-5",
@@ -60,7 +59,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("lowers adaptive thinking settings with effort", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLMRequest.update(request, {
           providerOptions: {
             anthropic: { thinking: { type: "adaptive", display: "summarized" }, effort: "low" },
@@ -77,17 +76,17 @@ describe("Anthropic Messages route", () => {
 
   it.effect("normalizes enabled and disabled thinking settings", () =>
     Effect.gen(function* () {
-      const enabled = yield* compileRequest(
+      const enabled = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLMRequest.update(request, {
           providerOptions: { anthropic: { thinking: { type: "enabled", budgetTokens: 1_024 } } },
         }),
       )
-      const legacy = yield* compileRequest(
+      const legacy = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLMRequest.update(request, {
           providerOptions: { anthropic: { thinking: { type: "enabled", budget_tokens: 2_048 } } },
         }),
       )
-      const disabled = yield* compileRequest(
+      const disabled = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLMRequest.update(request, {
           providerOptions: { anthropic: { thinking: { type: "disabled" } } },
         }),
@@ -101,7 +100,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("rejects enabled thinking without a budget", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLMRequest.update(request, {
           providerOptions: { anthropic: { thinking: { type: "enabled" } } },
         }),
@@ -113,7 +112,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("lowers chronological system updates natively for Claude Opus 4.8 with cache hints", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           model: opus48,
           messages: [
@@ -138,7 +137,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("lowers chronological system updates to wrapped user text for unsupported Anthropic models", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           model,
           messages: [
@@ -165,7 +164,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("rejects non-text chronological system update content before send", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model: opus48,
           messages: [
@@ -182,7 +181,7 @@ describe("Anthropic Messages route", () => {
   it.effect("falls back for unsupported native chronological system update placement", () =>
     Effect.gen(function* () {
       expect(
-        (yield* compileRequest(
+        (yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
           LLM.request({
             model: opus48,
             messages: [Message.assistant("Plain."), Message.system("After plain assistant.")],
@@ -197,11 +196,12 @@ describe("Anthropic Messages route", () => {
         },
       ])
       expect(
-        (yield* compileRequest(LLM.request({ model: opus48, messages: [Message.system("First.")], cache: "none" })))
-          .body.messages,
+        (yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
+          LLM.request({ model: opus48, messages: [Message.system("First.")], cache: "none" }),
+        )).body.messages,
       ).toEqual([{ role: "user", content: [{ type: "text", text: "<system-update>\nFirst.\n</system-update>" }] }])
       expect(
-        (yield* compileRequest(
+        (yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
           LLM.request({
             model: opus48,
             messages: [Message.user("Before."), Message.system("One."), Message.system("Two.")],
@@ -223,7 +223,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("rejects a system update between a local tool call and its result", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model: opus48,
           messages: [
@@ -242,7 +242,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("prepares tool call and tool result messages", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           id: "req_tool_result",
           model,
@@ -273,7 +273,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("keeps tools and sends tool_choice none", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           id: "req_tool_choice_none",
           model,
@@ -303,7 +303,7 @@ describe("Anthropic Messages route", () => {
   // not JSON-stringified into `tool_result.content`.
   it.effect("lowers media tool-result content as structured blocks", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           id: "req_tool_result_image",
           model,
@@ -335,7 +335,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("lowers single-image tool-result content as a structured image block", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           id: "req_tool_result_image_only",
           model,
@@ -360,7 +360,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("rejects unsupported media in tool-result content with a clear error", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_result_unsupported_media",
           model,
@@ -384,7 +384,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("prepares the composed native continuation request", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         continuationRequest({
           id: "req_native_continuation_anthropic",
           model,
@@ -428,7 +428,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("lowers preserved Anthropic reasoning signature metadata", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           messages: [
@@ -447,7 +447,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("round-trips redacted thinking as redacted_thinking blocks", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           messages: [
@@ -628,7 +628,9 @@ describe("Anthropic Messages route", () => {
         { type: "reasoning", text: "", providerMetadata: { anthropic: { signature: "sig_1" } } },
       ])
 
-      const prepared = yield* compileRequest(LLM.request({ model, messages: [response.message], cache: "none" }))
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
+        LLM.request({ model, messages: [response.message], cache: "none" }),
+      )
       expect(prepared.body.messages).toEqual([
         { role: "assistant", content: [{ type: "thinking", thinking: "", signature: "sig_1" }] },
       ])
@@ -771,7 +773,7 @@ describe("Anthropic Messages route", () => {
           ),
         ),
       )
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
         LLM.request({
           model,
           messages: [
@@ -1131,7 +1133,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("round-trips provider-executed assistant content into server tool blocks", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_round_trip",
           model,
@@ -1182,7 +1184,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("rejects round-trip for unknown server tool names", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_unknown_server_tool",
           model,
@@ -1259,7 +1261,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("maps ttlSeconds >= 3600 to cache_control ttl: '1h'", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           system: { type: "text", text: "system", cache: new CacheHint({ type: "ephemeral", ttlSeconds: 3600 }) },
@@ -1275,7 +1277,7 @@ describe("Anthropic Messages route", () => {
 
   it.effect("emits cache_control on tool definitions and tool-result blocks", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           tools: [
@@ -1316,7 +1318,7 @@ describe("Anthropic Messages route", () => {
   it.effect("drops cache_control breakpoints past the 4-per-request cap", () =>
     Effect.gen(function* () {
       const hint = new CacheHint({ type: "ephemeral" })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           system: [
@@ -1342,7 +1344,7 @@ describe("Anthropic Messages route", () => {
   it.effect("spends breakpoint budget on tools before system before messages", () =>
     Effect.gen(function* () {
       const hint = new CacheHint({ type: "ephemeral" })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           tools: [

packages/ai/test/provider/bedrock-converse.test.ts

@@ -13,7 +13,6 @@ import {
   ToolDefinition,
 } from "../../src"
 import { LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import { AmazonBedrock } from "../../src/providers"
 import * as BedrockConverse from "../../src/protocols/bedrock-converse"
 import { it } from "../lib/effect"
@@ -102,7 +101,7 @@ const baseRequest = LLM.request({
 describe("Bedrock Converse route", () => {
   it.effect("prepares Converse target with system, inference config, and messages", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(baseRequest)
+      const prepared = yield* LLMClient.prepare(baseRequest)
 
       expect(prepared.body).toEqual({
         modelId: "anthropic.claude-3-5-sonnet-20240620-v1:0",
@@ -115,7 +114,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("passes topK through additionalModelRequestFields as top_k", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
         LLMRequest.update(baseRequest, {
           generation: GenerationOptions.make({ maxTokens: 64, temperature: 0, topK: 40 }),
         }),
@@ -130,14 +129,14 @@ describe("Bedrock Converse route", () => {
 
   it.effect("omits additionalModelRequestFields when topK is unset", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(baseRequest)
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(baseRequest)
       expect(prepared.body.additionalModelRequestFields).toBeUndefined()
     }),
   )
 
   it.effect("lowers chronological system updates to wrapped user text in order", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
         LLM.request({
           model,
           messages: [Message.user("Before."), Message.system("Update."), Message.assistant("After.")],
@@ -154,7 +153,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("prepares tool config with toolSpec and toolChoice", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLMRequest.update(baseRequest, {
           tools: [
             ToolDefinition.make({
@@ -188,7 +187,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("keeps tools and omits the unsupported choice when tool choice is none", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLMRequest.update(baseRequest, {
           tools: [
             ToolDefinition.make({
@@ -218,7 +217,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("lowers assistant tool-call + tool-result message history", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_history",
           model,
@@ -257,7 +256,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("lowers image content in tool-result messages", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_image",
           model,
@@ -492,7 +491,7 @@ describe("Bedrock Converse route", () => {
         providerMetadata: { bedrock: { signature: "sig_1" } },
       })
 
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
         LLM.request({
           model,
           messages: [
@@ -547,7 +546,9 @@ describe("Bedrock Converse route", () => {
         },
       ])
 
-      const prepared = yield* compileRequest(LLM.request({ model, messages: [response.message], cache: "none" }))
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
+        LLM.request({ model, messages: [response.message], cache: "none" }),
+      )
       expect(prepared.body.messages).toEqual([
         {
           role: "assistant",
@@ -638,7 +639,7 @@ describe("Bedrock Converse route", () => {
         text: "",
         providerMetadata: { bedrock: { redactedData } },
       })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
         LLM.request({
           model,
           messages: [
@@ -753,7 +754,7 @@ describe("Bedrock Converse route", () => {
           secretAccessKey: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY",
         },
       }).model("anthropic.claude-3-5-sonnet-20240620-v1:0")
-      const prepared = yield* compileRequest(LLMRequest.update(baseRequest, { model: signed }))
+      const prepared = yield* LLMClient.prepare(LLMRequest.update(baseRequest, { model: signed }))
 
       expect(prepared.route).toBe("bedrock-converse")
       expect(prepared.model).toBe(signed)
@@ -763,7 +764,7 @@ describe("Bedrock Converse route", () => {
   it.effect("emits cachePoint markers after system, user-text, and assistant-text with cache hints", () =>
     Effect.gen(function* () {
       const cache = new CacheHint({ type: "ephemeral" })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_cache",
           model,
@@ -795,7 +796,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("does not emit cachePoint when no cache hint is set", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(baseRequest)
+      const prepared = yield* LLMClient.prepare(baseRequest)
       expect(prepared.body).toMatchObject({
         system: [{ text: "You are concise." }],
         messages: [{ role: "user", content: [{ text: "Say hello." }] }],
@@ -805,7 +806,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("lowers image media into Bedrock image blocks", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_image",
           model,
@@ -842,7 +843,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("base64-encodes Uint8Array image bytes", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_image_bytes",
           model,
@@ -864,7 +865,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("lowers document media into Bedrock document blocks with format and name", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_doc",
           model,
@@ -896,7 +897,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("requires names for document media", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model,
           messages: [Message.user({ type: "media", mediaType: "application/pdf", data: "UERGREFUQQ==" })],
@@ -909,7 +910,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("passes named document-only messages through for provider validation", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
         LLM.request({
           model,
           cache: "none",
@@ -935,7 +936,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("lowers document media in tool results", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<BedrockConverse.BedrockConverseBody>(
         LLM.request({
           model,
           cache: "none",
@@ -987,7 +988,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("rejects unsupported image media types", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_bad_image",
           model,
@@ -1001,7 +1002,7 @@ describe("Bedrock Converse route", () => {
 
   it.effect("rejects unsupported document media types", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_bad_doc",
           model,
@@ -1016,7 +1017,7 @@ describe("Bedrock Converse route", () => {
   it.effect("maps ttlSeconds >= 3600 to cachePoint ttl: '1h'", () =>
     Effect.gen(function* () {
       const cache = new CacheHint({ type: "ephemeral", ttlSeconds: 3600 })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           system: [{ type: "text", text: "system", cache }],
@@ -1033,7 +1034,7 @@ describe("Bedrock Converse route", () => {
   it.effect("appends cachePoint after marked tool definitions and tool-result blocks", () =>
     Effect.gen(function* () {
       const cache = new CacheHint({ type: "ephemeral" })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           tools: [{ name: "lookup", description: "lookup", inputSchema: { type: "object", properties: {} }, cache }],
@@ -1065,7 +1066,7 @@ describe("Bedrock Converse route", () => {
   it.effect("drops cachePoint markers past the 4-per-request cap", () =>
     Effect.gen(function* () {
       const cache = new CacheHint({ type: "ephemeral" })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           system: [

packages/ai/test/provider/cloudflare.test.ts

@@ -3,7 +3,7 @@ import { ConfigProvider, Effect, Schema } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, LLMEvent } from "../../src"
 import { CloudflareAIGateway, CloudflareWorkersAI } from "../../src/providers/cloudflare"
-import { compileRequest } from "../../src/route/client"
+import { LLMClient } from "../../src/route"
 import { it } from "../lib/effect"
 import { dynamicResponse } from "../lib/http"
 import { sseEvents } from "../lib/sse"
@@ -34,7 +34,7 @@ describe("Cloudflare", () => {
       })
       expect(model.route.endpoint.baseURL).toBe("https://gateway.ai.cloudflare.com/v1/test-account/test-gateway/compat")
 
-      const prepared = yield* compileRequest(LLM.request({ model, prompt: "Say hello." }))
+      const prepared = yield* LLMClient.prepare(LLM.request({ model, prompt: "Say hello." }))
 
       expect(prepared.route).toBe("cloudflare-ai-gateway")
       expect(prepared.body).toMatchObject({
@@ -129,7 +129,7 @@ describe("Cloudflare", () => {
         openai: { reasoningField: "reasoning", reasoningDetails: merged },
       })
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare(LLM.request({ model, messages: [response.message] }))
       expect(replay.body.messages).toEqual([
         { role: "assistant", content: "Hello", reasoning: "Thinking", reasoning_details: merged },
       ])
@@ -180,7 +180,7 @@ describe("Cloudflare", () => {
 
   it.effect("allows a fully configured baseURL override", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: CloudflareAIGateway.configure({
             baseURL: "https://gateway.proxy.test/v1/custom/compat",
@@ -208,7 +208,7 @@ describe("Cloudflare", () => {
       })
       expect(model.route.endpoint.baseURL).toBe("https://api.cloudflare.com/client/v4/accounts/test-account/ai/v1")
 
-      const prepared = yield* compileRequest(LLM.request({ model, prompt: "Say hello." }))
+      const prepared = yield* LLMClient.prepare(LLM.request({ model, prompt: "Say hello." }))
 
       expect(prepared.route).toBe("cloudflare-workers-ai")
       expect(prepared.body).toMatchObject({

packages/ai/test/provider/gemini.test.ts

@@ -2,7 +2,6 @@ import { describe, expect } from "bun:test"
 import { Effect } from "effect"
 import { LLM, LLMError, LLMRequest, Message, ToolCallPart, ToolDefinition, Usage } from "../../src"
 import { Auth, LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import * as Gemini from "../../src/protocols/gemini"
 import { ProviderShared } from "../../src/protocols/shared"
 import { it } from "../lib/effect"
@@ -27,7 +26,7 @@ const request = LLM.request({
 describe("Gemini route", () => {
   it.effect("prepares Gemini target", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(request)
+      const prepared = yield* LLMClient.prepare(request)
 
       expect(prepared.body).toEqual({
         contents: [{ role: "user", parts: [{ text: "Say hello." }] }],
@@ -39,12 +38,12 @@ describe("Gemini route", () => {
 
   it.effect("normalizes Gemini thinking options", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<Gemini.GeminiBody>(
         LLMRequest.update(request, {
           providerOptions: { gemini: { thinkingConfig: { thinkingBudget: 0, includeThoughts: false } } },
         }),
       )
-      const filtered = yield* compileRequest(
+      const filtered = yield* LLMClient.prepare<Gemini.GeminiBody>(
         LLMRequest.update(request, {
           providerOptions: { gemini: { thinkingConfig: { thinkingBudget: "invalid", includeThoughts: false } } },
         }),
@@ -60,7 +59,7 @@ describe("Gemini route", () => {
 
   it.effect("lowers chronological system updates to wrapped user text in order", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<Gemini.GeminiBody>(
         LLM.request({
           model,
           messages: [Message.user("Before."), Message.system("Update."), Message.assistant("After.")],
@@ -76,7 +75,7 @@ describe("Gemini route", () => {
 
   it.effect("prepares multimodal user input and tool history", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_result",
           model,
@@ -144,7 +143,7 @@ describe("Gemini route", () => {
 
   it.effect("continues media tool results as inline model input without base64 text", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<Gemini.GeminiBody>(
         LLM.request({
           model,
           messages: [
@@ -189,7 +188,7 @@ describe("Gemini route", () => {
 
   it.effect("strips matching data URLs to raw base64 inlineData", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<Gemini.GeminiBody>(
         LLM.request({
           model,
           messages: [
@@ -230,7 +229,7 @@ describe("Gemini route", () => {
   ] as const)
     it.effect(`rejects ${name}`, () =>
       Effect.gen(function* () {
-        const error = yield* compileRequest(
+        const error = yield* LLMClient.prepare(
           LLM.request({ model, messages: [Message.user({ type: "media", ...media })] }),
         ).pipe(Effect.flip)
         expect(error.message).toMatch(/does not support|does not match|valid base64/)
@@ -239,7 +238,7 @@ describe("Gemini route", () => {
 
   it.effect("rejects oversized image input", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model,
           messages: [
@@ -257,7 +256,7 @@ describe("Gemini route", () => {
 
   it.effect("keeps tools and sends function calling mode NONE", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_choice_none",
           model,
@@ -277,7 +276,7 @@ describe("Gemini route", () => {
 
   it.effect("sanitizes integer enums, dangling required, untyped arrays, and scalar object keys", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_schema_patch",
           model,
@@ -458,7 +457,7 @@ describe("Gemini route", () => {
         response.events.findIndex((event) => event.type === "tool-call"),
       )
 
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<Gemini.GeminiBody>(
         LLM.request({
           model,
           messages: [
@@ -692,7 +691,7 @@ describe("Gemini route", () => {
 
   it.effect("rejects unsupported assistant media content", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_media",
           model,

packages/ai/test/provider/google-vertex.test.ts

@@ -4,7 +4,6 @@ import { HttpClientRequest } from "effect/unstable/http"
 import { LLM } from "../../src"
 import { GoogleVertex, GoogleVertexChat, GoogleVertexMessages, GoogleVertexResponses } from "../../src/providers"
 import { LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import { it } from "../lib/effect"
 import { dynamicResponse } from "../lib/http"
 import { deltaChunk, finishChunk } from "../lib/openai-chunks"
@@ -183,7 +182,7 @@ describe("Google Vertex providers", () => {
 
   it.effect("protects the Vertex Messages API version from body overlays", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model: GoogleVertexMessages.configure({
             accessToken: "vertex-token",

packages/ai/test/provider/openai-chat-reasoning.recorded.test.ts

@@ -5,7 +5,6 @@ import { OpenAIChat } from "../../src/protocols/openai-chat"
 import * as OpenAICompatible from "../../src/providers/openai-compatible"
 import * as OpenRouter from "../../src/providers/openrouter"
 import { LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import { recordedTests } from "../recorded-test"
 import { expectWeatherToolLoop, goldenWeatherToolLoopRequest, runWeatherToolLoop } from "../recorded-scenarios"
 
@@ -85,7 +84,9 @@ for (const item of cases) {
             ),
           ).toBe(true)
 
-          const replay = yield* compileRequest(LLM.request({ model: item.model, messages: [response.message] }))
+          const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+            LLM.request({ model: item.model, messages: [response.message] }),
+          )
           expect(replay.body.messages).toMatchObject([
             { role: "assistant", content: response.text, reasoning: response.reasoning },
           ])

packages/ai/test/provider/openai-chat.test.ts

@@ -18,7 +18,6 @@ import * as OpenAI from "../../src/providers/openai"
 import * as OpenAIChat from "../../src/protocols/openai-chat"
 import { ProviderShared } from "../../src/protocols/shared"
 import { Auth, LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import { it } from "../lib/effect"
 import { dynamicResponse, fixedResponse, truncatedStream } from "../lib/http"
 import { deltaChunk, usageChunk } from "../lib/openai-chunks"
@@ -43,7 +42,11 @@ const request = LLM.request({
 describe("OpenAI Chat route", () => {
   it.effect("prepares OpenAI Chat payload", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(request)
+      // Pass the OpenAIChat payload type so `prepared.body` is statically
+      // typed to the route's native shape — the assertions below read field
+      // names without `unknown` casts.
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(request)
+      const _typed: { readonly model: string; readonly stream: true } = prepared.body
 
       expect(prepared.body).toEqual({
         model: "gpt-4o-mini",
@@ -61,7 +64,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("lowers chronological system updates to escaped user wrappers in order", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -84,7 +87,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("replays canonical reasoning as OpenAI-compatible reasoning_content", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -102,7 +105,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("writes reasoning to a configured custom field on every assistant message", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model: Model.update(model, { compatibility: { reasoningField: "vendor_reasoning" } }),
           messages: [
@@ -128,7 +131,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("rejects reasoning fields that conflict with assistant message fields", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model: Model.update(model, { compatibility: { reasoningField: "content" } }),
           messages: [Message.assistant([{ type: "reasoning", text: "thinking" }])],
@@ -141,7 +144,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("maps OpenAI provider options to Chat options", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model: OpenAI.configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).chat("gpt-4o-mini"),
           prompt: "think",
@@ -156,7 +159,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("passes through custom OpenAI-compatible reasoning effort strings", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           prompt: "think",
@@ -250,7 +253,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("prepares assistant tool-call and tool-result messages", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_result",
           model,
@@ -288,7 +291,7 @@ describe("OpenAI Chat route", () => {
   it.effect("preserves structured tool errors for the model", () =>
     Effect.gen(function* () {
       const error = { error: { type: "unknown", message: "Tool execution interrupted" } }
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -308,7 +311,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("continues image tool results as vision input without base64 text", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -352,7 +355,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("orders parallel tool responses before one aggregated vision message", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -402,7 +405,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("aggregates consecutive tool images with a following system update", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -443,7 +446,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("appends system updates without replacing multipart user content", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -471,7 +474,7 @@ describe("OpenAI Chat route", () => {
   ] as const)
     it.effect(`rejects ${name}`, () =>
       Effect.gen(function* () {
-        const error = yield* compileRequest(
+        const error = yield* LLMClient.prepare(
           LLM.request({ model, messages: [Message.user({ type: "media", ...media })] }),
         ).pipe(Effect.flip)
         expect(error.message).toMatch(/does not support|does not match|valid base64/)
@@ -480,7 +483,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("rejects oversized image input", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model,
           messages: [
@@ -498,7 +501,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("prepares raw and data URL image media as vision input", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           id: "req_media",
           model,
@@ -525,7 +528,7 @@ describe("OpenAI Chat route", () => {
 
   it.effect("lowers reasoning-only assistant history", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           id: "req_reasoning",
           model,
@@ -616,7 +619,9 @@ describe("OpenAI Chat route", () => {
           openai: { reasoningField: field },
         })
 
-        const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+        const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+          LLM.request({ model, messages: [response.message] }),
+        )
         expect(replay.body.messages).toEqual([{ role: "assistant", content: "Hello", [field]: "thinking" }])
       }
     }),
@@ -642,7 +647,9 @@ describe("OpenAI Chat route", () => {
         openai: { reasoningField: "vendor_reasoning" },
       })
 
-      const replay = yield* compileRequest(LLM.request({ model: custom, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model: custom, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([{ role: "assistant", content: "Hello", vendor_reasoning: "thinking" }])
     }),
   )
@@ -685,7 +692,9 @@ describe("OpenAI Chat route", () => {
         openai: { reasoningField: "reasoning", reasoningDetails: details },
       })
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([
         {
           role: "assistant",
@@ -728,7 +737,9 @@ describe("OpenAI Chat route", () => {
         openai: { reasoningDetails: details },
       })
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([{ role: "assistant", content: "Hello", reasoning_details: details }])
     }),
   )
@@ -753,7 +764,9 @@ describe("OpenAI Chat route", () => {
         openai: { reasoningField: "reasoning", reasoningDetails: details },
       })
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([
         { role: "assistant", content: "Hello", reasoning: "thinking", reasoning_details: details },
       ])
@@ -826,7 +839,9 @@ describe("OpenAI Chat route", () => {
         openai: { reasoningDetails: [] },
       })
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([{ role: "assistant", content: "Hello", reasoning_details: [] }])
     }),
   )
@@ -874,7 +889,9 @@ describe("OpenAI Chat route", () => {
         response.events.findIndex(LLMEvent.is.textStart),
       )
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([
         { role: "assistant", content: "Hello", reasoning: "thinking", reasoning_details: merged },
       ])
@@ -901,7 +918,9 @@ describe("OpenAI Chat route", () => {
       expect(response.events.filter(LLMEvent.is.reasoningStart)).toHaveLength(1)
       expect(response.events.filter(LLMEvent.is.reasoningEnd)).toHaveLength(1)
 
-      const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(replay.body.messages).toEqual([{ role: "assistant", content: null, reasoning_details: details }])
     }),
   )
@@ -931,7 +950,7 @@ describe("OpenAI Chat route", () => {
     Effect.gen(function* () {
       const first = { type: "reasoning.text", text: "first", signature: "signed-0", index: 0 }
       const second = { type: "reasoning.text", text: "second", signature: "signed-1", index: 1 }
-      const replay = yield* compileRequest(
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -960,7 +979,7 @@ describe("OpenAI Chat route", () => {
   it.effect("retains scalar replay for mixed structured reasoning parts", () =>
     Effect.gen(function* () {
       const detail = { type: "reasoning.encrypted", data: "opaque", index: 0 }
-      const replay = yield* compileRequest(
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [
@@ -985,7 +1004,7 @@ describe("OpenAI Chat route", () => {
   it.effect("replays native scalar reasoning alongside native details", () =>
     Effect.gen(function* () {
       const details = [{ type: "reasoning.encrypted", data: "opaque", index: 0 }]
-      const replay = yield* compileRequest(
+      const replay = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           messages: [

packages/ai/test/provider/openai-compatible-chat.test.ts

@@ -3,7 +3,6 @@ import { Effect, Schema } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, LLMRequest, Message, ToolCallPart, ToolChoice, ToolDefinition } from "../../src"
 import { Auth, LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import * as OpenAICompatible from "../../src/providers/openai-compatible"
 import * as OpenAICompatibleChat from "../../src/protocols/openai-compatible-chat"
 import { it } from "../lib/effect"
@@ -53,7 +52,7 @@ const providerFamilies = [
 describe("OpenAI-compatible Chat route", () => {
   it.effect("prepares generic Chat target", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLMRequest.update(request, {
           tools: [ToolDefinition.make({ name: "lookup", description: "Lookup data", inputSchema: { type: "object" } })],
           toolChoice: ToolChoice.make({ type: "required" }),
@@ -128,7 +127,7 @@ describe("OpenAI-compatible Chat route", () => {
 
   it.effect("matches AI SDK compatible basic request body fixture", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(request)
+      const prepared = yield* LLMClient.prepare(request)
 
       expect(prepared.body).toEqual({
         model: "deepseek-chat",
@@ -146,7 +145,7 @@ describe("OpenAI-compatible Chat route", () => {
 
   it.effect("matches AI SDK compatible tool request body fixture", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_parity",
           model,

packages/ai/test/provider/openai-compatible-responses.test.ts

@@ -7,7 +7,6 @@ import { OpenResponses } from "../../src/protocols/open-responses"
 import { OpenAICompatibleResponses } from "../../src/protocols/openai-compatible-responses"
 import { OpenAIResponses } from "../../src/protocols/openai-responses"
 import { LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import { it } from "../lib/effect"
 import { fixedResponse } from "../lib/http"
 import { sseEvents } from "../lib/sse"
@@ -24,7 +23,7 @@ describe("Open Responses-compatible route", () => {
         baseURL: "https://responses.example.test/v1",
         provider: "example",
       }).model("example-model")
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           system: "You are concise.",
@@ -62,7 +61,7 @@ describe("Open Responses-compatible route", () => {
         apiKey: "test-key",
         baseURL: "https://responses.example.test/v1",
       }).model("example-model")
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({ model, prompt: "Draw.", tools: [OpenAI.imageGeneration()] }),
       ).pipe(Effect.flip)
 
@@ -77,7 +76,7 @@ describe("Open Responses-compatible route", () => {
         apiKey: "test-key",
         baseURL: "https://responses.example.test/v1",
       }).model("example-model")
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model,
           messages: [
@@ -103,7 +102,7 @@ describe("Open Responses-compatible route", () => {
         baseURL: "https://responses.example.test/v1",
         providerOptions: { openresponses: { reasoningEffort: "low", store: true } },
       }).model("example-model")
-      const prepared = yield* compileRequest(LLM.request({ model, prompt: "Think." }))
+      const prepared = yield* LLMClient.prepare(LLM.request({ model, prompt: "Think." }))
 
       expect(prepared.body).toMatchObject({
         reasoning: { effort: "low" },

packages/ai/test/provider/openai-responses.test.ts

@@ -14,7 +14,6 @@ import {
   Usage,
 } from "../../src"
 import { Auth, LLMClient, RequestExecutor, WebSocketExecutor } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import * as Azure from "../../src/providers/azure"
 import * as OpenAI from "../../src/providers/openai"
 import * as XAI from "../../src/providers/xai"
@@ -57,7 +56,7 @@ const expectToolOutput = (body: OpenAIResponses.OpenAIResponsesBody): OpenAITool
 describe("OpenAI Responses route", () => {
   it.effect("prepares OpenAI Responses target", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(request)
+      const prepared = yield* LLMClient.prepare(request)
 
       expect(prepared.body).toEqual({
         model: "gpt-4.1-mini",
@@ -75,7 +74,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("lowers the hosted OpenAI image generation tool", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           prompt: "Show me a rooftop garden.",
@@ -93,7 +92,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("rejects invalid hosted image generation options locally", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           model,
           prompt: "Show me a rooftop garden.",
@@ -110,7 +109,7 @@ describe("OpenAI Responses route", () => {
     Effect.gen(function* () {
       const input = LLMRequest.update(request, { providerOptions: { openai: { serviceTier: "priority" } } })
       expect(input.providerOptions).toEqual({ openai: { serviceTier: "priority" } })
-      const prepared = yield* compileRequest(input)
+      const prepared = yield* LLMClient.prepare(input)
 
       expect(prepared.body).toMatchObject({ service_tier: "priority" })
       expect(prepared.body).not.toHaveProperty("serviceTier")
@@ -119,7 +118,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("passes through custom OpenAI reasoning effort strings", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLMRequest.update(request, { providerOptions: { openai: { reasoningEffort: "experimental" } } }),
       )
 
@@ -129,7 +128,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("omits unsupported semantic service tiers", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLMRequest.update(request, { providerOptions: { openai: { serviceTier: "unsupported" } } }),
       )
 
@@ -139,7 +138,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("flattens top-level object unions in function schemas", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLMRequest.update(request, {
           tools: [
             ToolDefinition.make({
@@ -192,7 +191,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("lowers chronological system updates to escaped user wrappers in order", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -218,7 +217,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("prepares OpenAI Responses WebSocket target", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLMRequest.update(request, {
           model: OpenAIResponses.webSocketRoute
             .with({ endpoint: { baseURL: "https://api.openai.test/v1/" }, auth: Auth.bearer("test") })
@@ -396,7 +395,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("prepares function call and function output input items", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_result",
           model,
@@ -433,7 +432,7 @@ describe("OpenAI Responses route", () => {
         content: [],
         structured: {},
       }
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -454,7 +453,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("keeps primitive tool errors as plain text", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -470,7 +469,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("keeps non-JSON tool errors as plain text", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -488,7 +487,7 @@ describe("OpenAI Responses route", () => {
   // image data is not JSON-stringified into `function_call_output.output`.
   it.effect("lowers image tool-result content as structured input_image items", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           id: "req_tool_result_image",
           model,
@@ -517,7 +516,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("lowers single-image tool-result content as structured input_image array", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           id: "req_tool_result_image_only",
           model,
@@ -541,7 +540,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("lowers PDF tool-result content as structured input_file array", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           id: "req_tool_result_pdf",
           model,
@@ -576,7 +575,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("uses xAI inline file encoding for PDF tool results", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model: xaiModel,
           messages: [
@@ -611,7 +610,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("rejects unsupported media in tool-result content with a clear error", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_tool_result_unsupported_media",
           model,
@@ -634,7 +633,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("prepares the composed native continuation request", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         continuationRequest({
           id: "req_native_continuation_openai",
           model,
@@ -676,7 +675,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("maps OpenAI provider options to Responses options", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model: OpenAI.configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).model("gpt-5.2"),
           prompt: "think",
@@ -701,7 +700,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("accepts the full ResponseIncludable union", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           prompt: "hi",
@@ -723,7 +722,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("filters unknown includable values out of the include array", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           prompt: "hi",
@@ -740,7 +739,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("treats an explicit empty include as no include at all", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({ model, prompt: "hi", providerOptions: { openai: { include: [] } } }),
       )
 
@@ -750,7 +749,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("treats an all-invalid include as no include at all", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({ model, prompt: "hi", providerOptions: { openai: { include: ["bogus.thing"] } } }),
       )
 
@@ -760,7 +759,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("omits include when no include is set", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({ model, prompt: "hi", providerOptions: { openai: { store: false } } }),
       )
 
@@ -774,7 +773,7 @@ describe("OpenAI Responses route", () => {
       // reasoningSummary: "auto" by default. Without `include`, a follow-up
       // turn cannot replay reasoning state, so the facade also opts into
       // `reasoning.encrypted_content` automatically.
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model: OpenAI.configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).responses("gpt-5.2"),
           prompt: "hi",
@@ -789,7 +788,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("lets callers opt out of the GPT-5 default include", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model: OpenAI.configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).responses("gpt-5.2"),
           prompt: "hi",
@@ -803,7 +802,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("request OpenAI provider options override route defaults", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model: OpenAI.configure({
             baseURL: "https://api.openai.test/v1/",
@@ -935,7 +934,9 @@ describe("OpenAI Responses route", () => {
         },
       ])
 
-      const prepared = yield* compileRequest(LLM.request({ model, messages: [response.message] }))
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
+        LLM.request({ model, messages: [response.message] }),
+      )
       expect(prepared.body.input).toEqual([
         {
           role: "assistant",
@@ -1269,7 +1270,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("preserves assistant content order around reasoning items", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           id: "req_reasoning_order",
           model,
@@ -1307,7 +1308,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("references stored reasoning items by id", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -1329,7 +1330,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("references stored provider-executed hosted tool results by id", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -1366,7 +1367,7 @@ describe("OpenAI Responses route", () => {
   it.effect("continues stateless hosted image generation with the generated image", () =>
     Effect.gen(function* () {
       const imageTool = OpenAI.imageGeneration({ action: "edit" })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model,
           messages: [
@@ -1407,7 +1408,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("joins streamed summary blocks into one continuation reasoning item", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           id: "req_multi_summary_continuation",
           model,
@@ -1444,7 +1445,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("skips non-persisted reasoning ids without encrypted state", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           id: "req_reasoning_without_encrypted_state",
           model,
@@ -1761,7 +1762,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("lowers user image and PDF content", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           id: "req_media",
           model,
@@ -1792,7 +1793,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("uses xAI inline file encoding for user PDFs", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
         LLM.request({
           model: xaiModel,
           messages: [
@@ -1824,7 +1825,7 @@ describe("OpenAI Responses route", () => {
 
   it.effect("rejects unsupported user media content", () =>
     Effect.gen(function* () {
-      const error = yield* compileRequest(
+      const error = yield* LLMClient.prepare(
         LLM.request({
           id: "req_media",
           model,

packages/ai/test/provider/openrouter.test.ts

@@ -2,7 +2,6 @@ import { describe, expect } from "bun:test"
 import { Effect } from "effect"
 import { LLM, Message } from "../../src"
 import { LLMClient } from "../../src/route"
-import { compileRequest } from "../../src/route/client"
 import * as OpenRouter from "../../src/providers/openrouter"
 import { it } from "../lib/effect"
 import { fixedResponse } from "../lib/http"
@@ -20,7 +19,7 @@ describe("OpenRouter", () => {
       })
       expect(model.route.endpoint.baseURL).toBe("https://openrouter.ai/api/v1")
 
-      const prepared = yield* compileRequest(LLM.request({ model, prompt: "Say hello." }))
+      const prepared = yield* LLMClient.prepare(LLM.request({ model, prompt: "Say hello." }))
 
       expect(prepared.route).toBe("openrouter")
       expect(prepared.body).toMatchObject({
@@ -33,7 +32,7 @@ describe("OpenRouter", () => {
 
   it.effect("applies OpenRouter payload options from the model helper", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare(
         LLM.request({
           model: OpenRouter.configure({
             apiKey: "test-key",
@@ -101,7 +100,7 @@ describe("OpenRouter", () => {
         { type: "reasoning.text", signature: "signed", format: "anthropic-claude-v1", index: 0 },
         { type: "reasoning.encrypted", data: "opaque", format: "openai-responses-v1", index: 1 },
       ]
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenRouter.OpenRouterBody>(
         LLM.request({
           model: OpenRouter.configure({ apiKey: "test-key" }).model("anthropic/claude-sonnet-4.6"),
           messages: [
@@ -134,7 +133,7 @@ describe("OpenRouter", () => {
         { type: "reasoning.encrypted", id: "state", data: "opaque" },
         { type: "reasoning.encrypted", id: "state", data: "opaque" },
       ]
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenRouter.OpenRouterBody>(
         LLM.request({
           model: OpenRouter.configure({ apiKey: "test-key" }).model("anthropic/claude-sonnet-4.6"),
           messages: [
@@ -159,7 +158,7 @@ describe("OpenRouter", () => {
         { type: "reasoning.text", id: "first", index: 0, text: "A", opaque: "first" },
         { type: "reasoning.text", id: "second", index: 1, text: "B", opaque: "second" },
       ]
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenRouter.OpenRouterBody>(
         LLM.request({
           model: OpenRouter.configure({ apiKey: "test-key" }).model("anthropic/claude-sonnet-4.6"),
           messages: [
@@ -180,7 +179,7 @@ describe("OpenRouter", () => {
 
   it.effect("omits scalar reasoning without continuation details", () =>
     Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenRouter.OpenRouterBody>(
         LLM.request({
           model: OpenRouter.configure({ apiKey: "test-key" }).model("anthropic/claude-sonnet-4.6"),
           messages: [Message.assistant({ type: "reasoning", text: "Thinking" })],

packages/ai/test/tool-schema-projection.test.ts

@@ -3,8 +3,7 @@ import { Effect } from "effect"
 import { LLM } from "../src"
 import { OpenAIChat } from "../src/protocols"
 import { ToolSchemaProjection } from "../src/protocols/utils/tool-schema"
-import { Auth } from "../src/route"
-import { compileRequest } from "../src/route/client"
+import { Auth, LLMClient } from "../src/route"
 import { it } from "./lib/effect"
 
 describe("tool schema projections", () => {
@@ -80,7 +79,7 @@ describe("tool schema projections", () => {
       const model = OpenAIChat.route
         .with({ endpoint: { baseURL: "https://api.openai.test/v1/" }, auth: Auth.bearer("test") })
         .model({ id: "kimi-k2", compatibility: { toolSchema: "moonshot" } })
-      const prepared = yield* compileRequest(
+      const prepared = yield* LLMClient.prepare<OpenAIChat.OpenAIChatBody>(
         LLM.request({
           model,
           prompt: "Use the tool.",

packages/app/V1_API_MIGRATION.md

@@ -0,0 +1,220 @@
+# V1 API Migration Checklist
+
+The app is currently hybrid. In this document, V1 refers to the legacy unprefixed server APIs used by `@opencode-ai/sdk/v2`, despite the SDK package name.
+
+## Events
+
+- [x] Replace `GET /global/event` with `GET /api/event`.
+  - `src/context/server-sdk.tsx`
+- [x] Reduce current granular session and message events into the existing app projections.
+  - `src/context/server-session-v2-reducer.ts`
+  - `src/context/server-session.ts`
+- [ ] Remove transitional session event dependencies: `session.created`, `session.updated`, `session.diff`, `session.status`, `session.idle`, and `session.error`.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/context/server-session.ts`
+  - `src/context/notification.tsx`
+  - `src/pages/session/usage-exceeded-dialogs.tsx`
+- [ ] Remove legacy message event compatibility: `message.updated`, `message.removed`, `message.part.updated`, `message.part.removed`, and `message.part.delta`.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/context/server-session.ts`
+- [x] Adapt current permission and question events to the existing request model.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/context/permission.tsx`
+- [x] Consume current file watcher events.
+  - `src/context/file.tsx`
+- [x] Consume current VCS events.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/pages/session.tsx`
+- [x] Consume current `pty.exited` events.
+  - `src/context/terminal.tsx`
+- [ ] Migrate LSP and reference events.
+  - `src/context/global-sync/event-reducer.ts`
+
+## Sessions
+
+- [x] Replace `GET /session/status` with one server-scoped `GET /api/session/active` snapshot plus V2 execution events.
+  - `src/context/server-sync.tsx`
+- [x] Migrate session listing from `GET /session`.
+  - `src/context/server-sync.tsx`
+  - `src/context/directory-sync.ts`
+  - `src/pages/layout.tsx`
+- [x] Migrate the remaining direct session read from `GET /session/:sessionID`.
+  - `src/components/titlebar.tsx`
+- [x] Migrate session updates from `PATCH /session/:sessionID`.
+  - `src/context/directory-sync.ts`
+  - `src/context/layout.tsx`
+  - `src/pages/home.tsx`
+  - `src/pages/layout.tsx`
+  - `src/pages/session/timeline/message-timeline.tsx`
+  - `src/components/titlebar-tab-nav.tsx`
+  - Renames use `POST /api/session/:sessionID/rename`; archival uses `POST /api/session/:sessionID/archive`.
+- [x] Migrate session deletion from `DELETE /session/:sessionID`.
+  - `src/pages/session/timeline/message-timeline.tsx`
+- [x] Remove session diff loading from `GET /session/:sessionID/diff`.
+  - Historical Session diffs remain unavailable until the current API defines their snapshot semantics.
+- [x] Migrate abort from `POST /session/:sessionID/abort`.
+  - `src/components/prompt-input/submit.ts`
+  - `src/pages/session/use-session-commands.tsx`
+  - `src/pages/session.tsx`
+- [x] Migrate revert and unrevert from `POST /session/:sessionID/revert` and `POST /session/:sessionID/unrevert`.
+  - `src/pages/session/use-session-commands.tsx`
+  - `src/pages/session.tsx`
+- [x] Replace `POST /session/:sessionID/summarize` with the current compact API.
+  - `src/pages/session/use-session-commands.tsx`
+- [x] Migrate slash commands from `POST /session/:sessionID/command`.
+  - `src/components/prompt-input/submit.ts`
+- [x] Migrate shell execution from `POST /session/:sessionID/shell`.
+  - `src/components/prompt-input/submit.ts`
+- [x] Migrate session fork from `POST /session/:sessionID/fork`.
+  - `src/components/dialog-fork.tsx`
+- [ ] Migrate sharing from `POST /session/:sessionID/share` and `DELETE /session/:sessionID/share`.
+  - `src/pages/session/use-session-commands.tsx`
+  - `src/pages/session/timeline/message-timeline.tsx`
+  - Blocked: the current API has no sharing contract or implementation.
+
+## Session Compatibility Fallbacks
+
+These calls are retained as fallback adapters. The current production path supplies the current session and message APIs.
+
+- [ ] Remove fallback `GET /session/:sessionID` after compatibility support is unnecessary.
+  - `src/context/server-session.ts`
+- [ ] Remove fallback `GET /session/:sessionID/message` after compatibility support is unnecessary.
+  - `src/context/server-session.ts`
+- [ ] Remove fallback `GET /session/:sessionID/message/:messageID` after compatibility support is unnecessary.
+  - `src/context/server-session.ts`
+
+## Filesystem
+
+- [ ] Migrate file listing from `GET /file`.
+  - `src/context/file.tsx`
+- [ ] Migrate file reads from `GET /file/content`.
+  - `src/context/file.tsx`
+  - `src/pages/session/review-tab.tsx`
+  - `src/pages/session/v2/review-panel-v2.tsx`
+- [x] Migrate path discovery from `GET /path` to `GET /api/path`.
+  - `src/context/global-sync/bootstrap.ts`
+  - `src/components/dialog-select-directory.tsx`
+  - `src/components/dialog-select-directory-v2.tsx`
+
+## Projects And Worktrees
+
+- [x] Migrate project listing from `GET /project` to `GET /api/project`.
+  - `src/context/global-sync/bootstrap.ts`
+- [x] Migrate the current project lookup from `GET /project/current` to `GET /api/project/current`.
+  - `src/context/global-sync/bootstrap.ts`
+- [ ] Migrate Git initialization from `POST /project/git/init`.
+  - `src/pages/session.tsx`
+- [x] Migrate project updates from `PATCH /project/:projectID` to `PATCH /api/project/:projectID`.
+  - `src/context/layout.tsx`
+  - `src/components/edit-project.ts`
+  - `src/pages/layout.tsx`
+- [ ] Migrate experimental worktree listing, creation, removal, and reset from `/experimental/worktree`.
+  - `src/pages/layout.tsx`
+  - `src/components/prompt-input/submit.ts`
+  - Listing now uses `GET /api/project/:projectID/directories`; create, removal, and reset remain.
+- [ ] Migrate instance disposal from `POST /instance/dispose`.
+  - `src/pages/layout.tsx`
+
+## VCS
+
+- [x] Migrate repository information from `GET /vcs` to `GET /api/vcs`.
+  - `src/context/global-sync/bootstrap.ts`
+- [x] Migrate diffs from `GET /vcs/diff` to `GET /api/vcs/diff`.
+  - `src/pages/session.tsx`
+- [x] Migrate status from `GET /vcs/status` to `GET /api/vcs/status`.
+  - `src/pages/layout.tsx`
+
+## Configuration And Authentication
+
+- [ ] Migrate global configuration reads from `GET /global/config`.
+  - `src/context/global-sync/bootstrap.ts`
+- [ ] Migrate directory configuration reads from `GET /config`.
+  - `src/context/global-sync/bootstrap.ts`
+- [ ] Migrate global configuration updates from `PATCH /global/config`.
+  - `src/context/server-sync.tsx`
+- [x] Migrate provider authentication method discovery from `GET /provider/auth` to `GET /api/integration/:integrationID`.
+  - `src/components/dialog-connect-provider.tsx`
+- [x] Migrate built-in provider OAuth authorization and callbacks to `/api/integration/:integrationID/connect/oauth/*`.
+  - `src/components/dialog-connect-provider.tsx`
+- [ ] Migrate remaining credentials from `PUT /auth/:providerID` and `DELETE /auth/:providerID`.
+  - Built-in provider key connections now use `POST /api/integration/:integrationID/connect/key`.
+  - `src/components/dialog-connect-provider.tsx`
+  - `src/components/dialog-custom-provider.tsx`
+  - `src/components/settings-providers.tsx`
+  - `src/components/settings-v2/providers.tsx`
+- [ ] Migrate global disposal from `POST /global/dispose`.
+  - `src/components/dialog-connect-provider.tsx`
+  - `src/components/settings-providers.tsx`
+  - `src/components/settings-v2/providers.tsx`
+
+## Permissions And Questions
+
+- [x] Migrate permission listing from `GET /permission` to `GET /api/permission/request`.
+  - `src/context/global-sync/bootstrap.ts`
+  - `src/context/permission.tsx`
+- [x] Migrate permission responses from `/session/:sessionID/permissions/:permissionID`.
+  - `src/context/permission.tsx`
+  - `src/pages/session/composer/session-composer-state.ts`
+- [x] Migrate question listing from `GET /question` to `GET /api/question/request`.
+  - `src/context/global-sync/bootstrap.ts`
+- [x] Migrate question replies and rejections from `/question/:requestID/*` to `/api/session/:sessionID/question/:requestID/*`.
+  - `src/pages/session/composer/session-question-dock.tsx`
+
+## Commands, MCP, LSP, And References
+
+- [x] Migrate command listing from `GET /command` to `GET /api/command`.
+  - `src/context/global-sync/bootstrap.ts`
+  - `src/context/server-sync.tsx`
+- [x] Migrate MCP listing, connection, and disconnection from `/mcp` to `/api/mcp`.
+  - `src/context/server-sync.tsx`
+- [ ] Replace legacy MCP authentication with the Integration OAuth workflow.
+  - `src/context/server-sync.tsx`
+- [x] Migrate experimental resource listing from `GET /experimental/resource` to `GET /api/mcp/resource`.
+  - `src/context/server-sync.tsx`
+- [ ] Migrate LSP status from `GET /lsp`.
+  - `src/context/server-sync.tsx`
+- [x] Move `GET /api/reference` off the legacy generated SDK transport.
+  - `src/context/global-sync/bootstrap.ts`
+
+## Search
+
+- [x] Migrate global session search from `GET /experimental/session` to `GET /api/session`.
+  - `src/components/command-palette.ts`
+  - `src/components/dialog-command-palette-v2.tsx`
+
+## PTY And Terminal
+
+- [x] Migrate PTY creation, reads, updates, and deletion from `/pty` to `/api/pty`.
+  - `src/context/terminal.tsx`
+  - `src/components/terminal.tsx`
+- [x] Migrate shell listing from `GET /pty/shells` to `GET /api/pty/shells`.
+  - `src/components/settings-general.tsx`
+  - `src/components/settings-v2/general.tsx`
+- [x] Migrate connection tokens from `POST /pty/:ptyID/connect-token` to `POST /api/pty/:ptyID/connect-token`.
+  - `src/components/terminal.tsx`
+- [x] Migrate the direct WebSocket connection from `/pty/:ptyID/connect` to `/api/pty/:ptyID/connect`.
+  - `src/components/terminal.tsx`
+
+## Legacy Types And Adapters
+
+These are not V1 network requests, but they keep the UI coupled to V1 data contracts.
+
+- [ ] Replace the current-session-to-legacy-session adapter.
+  - `src/utils/session.ts`
+- [ ] Replace the current-message-to-legacy-message-and-part adapter.
+  - `src/utils/session-message.ts`
+- [ ] Replace current agent, provider, and model adapters to legacy SDK structures.
+  - `src/context/global-sync/utils.ts`
+- [ ] Replace legacy `Session`, `Message`, `Part`, `PermissionRequest`, `QuestionRequest`, `Project`, `FileNode`, `FileDiffInfo`, and `Event` types throughout app state and rendering.
+- [ ] Remove the `@opencode-ai/sdk` runtime dependency after all legacy calls and types are gone.
+  - `package.json`
+
+## Test Infrastructure
+
+- [ ] Replace V1 endpoint mocks with current API mocks.
+  - `e2e/utils/mock-server.ts`
+- [x] Replace `/global/event` and `/event` interception with current event transport handling.
+  - `e2e/utils/sse-transport.ts`
+- [ ] Replace `SessionV1` and legacy SDK fixtures in timeline performance tests.
+  - `e2e/performance/timeline-stability/fixture.ts`
+- [ ] Remove remaining legacy SDK type fixtures from unit and browser tests.

packages/app/e2e/performance/timeline-stability/fixture.ts

@@ -2,8 +2,17 @@ import { base64Encode } from "@opencode-ai/core/util/encode"
 import { Event } from "@opencode-ai/schema/event"
 import { SessionStatusEvent } from "@opencode-ai/schema/session-status-event"
 import { SessionV1 } from "@opencode-ai/schema/session-v1"
-import type { SessionV1Info, SessionStatus } from "@opencode-ai/client/promise"
-import type { AssistantMessage, Message, Part, ToolPart, ToolState, UserMessage } from "../../../src/types"
+import type {
+  AssistantMessage,
+  GlobalEvent,
+  Message,
+  Part,
+  Session,
+  SessionStatus,
+  ToolPart,
+  ToolState,
+  UserMessage,
+} from "@opencode-ai/sdk/v2/client"
 import { expect, type Page } from "@playwright/test"
 import { Schema } from "effect"
 import { mockOpenCodeServer } from "../../utils/mock-server"
@@ -18,29 +27,18 @@ export const assistantID = "msg_1001_timeline_assistant"
 export const title = "Timeline visual stability"
 export const model = { providerID: "opencode", modelID: "claude-opus-4-6", variant: "max" }
 
-type Session = SessionV1Info
-type GlobalEvent = {
-  directory: string
-  project?: string
-  workspace?: string
-  payload: {
-    id: string
-    type: string
-    properties: Record<string, unknown>
+type TimelinePayload = Extract<
+  GlobalEvent["payload"],
+  {
+    type:
+      | "message.updated"
+      | "message.removed"
+      | "message.part.updated"
+      | "message.part.removed"
+      | "message.part.delta"
+      | "session.status"
   }
-}
-
-type TimelineProperties = {
-  "message.updated": { sessionID: string; info: Message }
-  "message.removed": { sessionID: string; messageID: string }
-  "message.part.updated": { sessionID: string; part: Part; time: number }
-  "message.part.removed": { sessionID: string; messageID: string; partID: string }
-  "message.part.delta": { sessionID: string; messageID: string; partID: string; field: string; delta: string }
-  "session.status": { sessionID: string; status: SessionStatus }
-}
-type TimelinePayload = {
-  [Type in keyof TimelineProperties]: { id: string; type: Type; properties: TimelineProperties[Type] }
-}[keyof TimelineProperties]
+>
 
 type DeepReadonly<Value> = Value extends readonly unknown[]
   ? { readonly [Key in keyof Value]: DeepReadonly<Value[Key]> }
@@ -99,6 +97,7 @@ export async function setupTimeline(
     locale?: string
     deviceScaleFactor?: number
     seedHistory?: boolean
+    protocol?: "v1" | "v2"
   } = {},
 ) {
   const sessions = input.sessions ?? [session()]
@@ -116,6 +115,7 @@ export async function setupTimeline(
     retry: input.eventRetry ?? 20,
   })
   await mockOpenCodeServer(page, {
+    protocol: input.protocol,
     directory,
     project: project(),
     provider: provider(),
@@ -235,7 +235,7 @@ export function event(type: TimelinePayload["type"], properties: TimelinePayload
 }
 
 export function validateTimelineEvent(input: unknown): TimelineEvent {
-  return decodeEvent(input, decodeOptions) as TimelineEvent
+  return decodeEvent(input, decodeOptions)
 }
 
 export function validateTimelineMessages(input: readonly TimelineMessage[]): TimelineMessage[] {
@@ -460,7 +460,7 @@ export function toolPart(
   input: Record<string, unknown>,
   options: ToolOptions<ToolStatus> = {},
 ): Omit<ToolPart, "sessionID" | "messageID"> {
-  const base = { id, type: "tool" as const, callID: id, tool }
+  const base = { id, type: "tool" as const, callID: `call_${id}`, tool }
   if (state === "pending") return { ...base, state: { status: state, input, raw: "" } }
   if (state === "running")
     return {

packages/app/e2e/performance/unit/mock-server.test.ts

@@ -1,121 +1,6 @@
 import { expect, test } from "bun:test"
-import type { SessionMessageInfo } from "@opencode-ai/client/promise"
 import type { Page, Route } from "@playwright/test"
-import { currentMessage, mockOpenCodeServer } from "../../utils/mock-server"
-
-test("preserves current messages", () => {
-  const message = {
-    id: "msg_current",
-    type: "user",
-    time: { created: 1 },
-    text: "current",
-    files: [{ data: "e30=", mime: "application/json", source: { type: "inline" } }],
-  } satisfies SessionMessageInfo
-
-  expect(currentMessage(message)).toBe(message)
-})
-
-test("converts rich legacy messages to current message types", () => {
-  expect(
-    currentMessage({
-      info: { id: "msg_user", role: "user", time: { created: 1 } },
-      parts: [
-        { type: "text", text: "Use @src/a.ts with @explore" },
-        {
-          type: "file",
-          mime: "application/json",
-          filename: "data.json",
-          url: "data:application/json;base64,e30=",
-        },
-        {
-          type: "file",
-          mime: "text/plain",
-          filename: "a.ts",
-          url: "src/a.ts",
-          source: { type: "file", text: { value: "@src/a.ts", start: 4, end: 13 } },
-        },
-        { type: "agent", name: "explore", source: { value: "@explore", start: 19, end: 27 } },
-      ],
-    }),
-  ).toEqual({
-    id: "msg_user",
-    type: "user",
-    time: { created: 1 },
-    text: "Use @src/a.ts with @explore",
-    files: [
-      { data: "e30=", mime: "application/json", name: "data.json", source: { type: "inline" } },
-      {
-        data: "",
-        mime: "text/plain",
-        name: "a.ts",
-        source: { type: "uri", uri: "src/a.ts" },
-        mention: { text: "@src/a.ts", start: 4, end: 13 },
-      },
-    ],
-    agents: [{ name: "explore", mention: { text: "@explore", start: 19, end: 27 } }],
-  })
-
-  expect(
-    currentMessage({
-      info: {
-        id: "msg_assistant",
-        role: "assistant",
-        time: { created: 2, completed: 5 },
-        agent: "explore",
-        modelID: "model",
-        providerID: "provider",
-        variant: "high",
-        cost: 0.5,
-        tokens: { input: 1, output: 2, reasoning: 3, cache: { read: 4, write: 5 } },
-        finish: "tool-calls",
-        error: { name: "MessageAbortedError", data: { message: "Stopped" } },
-      },
-      parts: [
-        { type: "text", text: "Answer" },
-        { type: "reasoning", text: "Thinking", time: { start: 2, end: 3 } },
-        {
-          id: "prt_tool",
-          callID: "call_tool",
-          type: "tool",
-          tool: "read",
-          state: {
-            status: "completed",
-            input: { filePath: "src/a.ts" },
-            output: "contents",
-            metadata: { title: "a.ts" },
-            time: { start: 3, end: 4 },
-          },
-        },
-      ],
-    }),
-  ).toEqual({
-    id: "msg_assistant",
-    type: "assistant",
-    time: { created: 2, completed: 5 },
-    agent: "explore",
-    model: { id: "model", providerID: "provider", variant: "high" },
-    cost: 0.5,
-    tokens: { input: 1, output: 2, reasoning: 3, cache: { read: 4, write: 5 } },
-    finish: "tool-calls",
-    error: { type: "MessageAbortedError", message: "Stopped" },
-    content: [
-      { type: "text", text: "Answer" },
-      { type: "reasoning", text: "Thinking", time: { created: 2, completed: 3 } },
-      {
-        type: "tool",
-        id: "call_tool",
-        name: "read",
-        time: { created: 3, ran: 3, completed: 4 },
-        state: {
-          status: "completed",
-          input: { filePath: "src/a.ts" },
-          content: [{ type: "text", text: "contents" }],
-          metadata: { title: "a.ts" },
-        },
-      },
-    ],
-  })
-})
+import { mockOpenCodeServer } from "../../utils/mock-server"
 
 test("applies message latency after a list response gate is released", async () => {
   const events: string[] = []
@@ -145,7 +30,7 @@ test("applies message latency after a list response gate is released", async ()
   })
 
   const response = handler!({
-    request: () => ({ url: () => "http://127.0.0.1:4096/api/session/session/message" }),
+    request: () => ({ url: () => "http://127.0.0.1:4096/session/session/message" }),
     fulfill: () => {
       events.push("fulfill")
       return Promise.resolve()

packages/app/e2e/regression/cross-server-tab-close.spec.ts

@@ -85,17 +85,21 @@ async function mockServers(page: Page, requests: string[]) {
     const current = url.origin === serverA ? sessionA : sessionB
     const directory = url.searchParams.get("directory")
     if (directory && directory !== current.directory) return json(route, { name: "InvalidDirectory" }, 500)
-    if (url.pathname === "/api/event")
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
       return sse(route)
+    if (url.pathname === "/global/health") return json(route, {}, 404)
     if (url.pathname === "/api/health") return json(route, { pid: 1 })
     if (url.pathname === "/api/session") return json(route, { data: [currentSession(current)], cursor: {} })
     if (url.pathname === "/api/session/active") return json(route, { data: {} })
     if (url.pathname === `/api/session/${current.id}`) return json(route, { data: currentSession(current) })
     if (url.pathname === `/api/session/${current.id}/message`) return json(route, { data: [], cursor: {} })
+    if (url.pathname === `/session/${current.id}`) return json(route, current)
     if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
+    if (url.pathname === `/session/${current.id}/message`) return json(route, [])
     if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
     if (["/skill", "/command", "/lsp", "/formatter", "/permission", "/question", "/vcs/diff"].includes(url.pathname))
       return json(route, [])
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
     if (url.pathname === "/provider")
       return json(route, { all: [], connected: [], default: { providerID: "", modelID: "" } })
     if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])

packages/app/e2e/regression/legacy-new-session.spec.ts

@@ -1,11 +1,12 @@
 import { expect, test } from "@playwright/test"
+import { base64Encode } from "@opencode-ai/core/util/encode"
 import { mockOpenCodeServer } from "../utils/mock-server"
 
 const draftID = "draft_legacy_new_session"
 const directory = "C:/OpenCode/LegacyNewSession"
 const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
 
-test("keeps drafts in the tabs layout for profiles with an old layout preference", async ({ page }) => {
+test("redirects a draft to the legacy new-session route", async ({ page }) => {
   await mockOpenCodeServer(page, {
     directory,
     project: {
@@ -34,7 +35,7 @@ test("keeps drafts in the tabs layout for profiles with an old layout preference
 
   await page.goto(`/new-session?draftId=${draftID}`)
 
-  await expect(page).toHaveURL(`/new-session?draftId=${draftID}`)
-  await expect(page.locator("body")).toHaveAttribute("data-new-layout", "")
-  await expect(page.getByRole("textbox", { name: "Prompt" })).toBeVisible()
+  await expect(page).toHaveURL(`/${base64Encode(directory)}/session`)
+  await expect(page.locator("header[data-tauri-drag-region]")).toBeVisible()
+  await expect(page.locator('[data-component="prompt-input"]')).toBeVisible()
 })

packages/app/e2e/regression/remote-session-settings.spec.ts

@@ -3,7 +3,7 @@ import { expect, test, type Page, type Route } from "@playwright/test"
 import { installSseTransport } from "../utils/sse-transport"
 import { currentSession } from "../utils/mock-server"
 
-const serverA = `http://127.0.0.1:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+const serverA = "http://127.0.0.1:4096"
 const serverB = "http://127.0.0.1:4097"
 const directoryA = "C:/server-a"
 const directoryB = "/home/server-b"
@@ -32,7 +32,7 @@ test("session settings use the remote server context", async ({ page }) => {
     .poll(() =>
       permissionRequests.some((request) => {
         const url = new URL(request)
-        return url.origin === serverB && url.searchParams.get("location[directory]") === directoryB
+        return url.origin === serverB && url.searchParams.get("directory") === directoryB
       }),
     )
     .toBe(true)
@@ -67,7 +67,7 @@ test("auto-accept responds for an unfocused server session", async ({ page }) =>
     .poll(() =>
       permissionRequests.some((request) => {
         const url = new URL(request)
-        return url.origin === serverA && url.searchParams.get("location[directory]") === directoryA
+        return url.origin === serverA && url.searchParams.get("directory") === directoryA
       }),
     )
     .toBe(true)
@@ -99,10 +99,10 @@ test("auto-accept responds for an unfocused server session", async ({ page }) =>
     .toEqual([
       {
         origin: serverA,
-        directory: undefined,
+        directory: directoryA,
         sessionID: sessionA.id,
         permissionID: "permission-background-a",
-        body: { reply: "once" },
+        body: { response: "once" },
       },
     ])
 
@@ -127,17 +127,17 @@ test("auto-accept responds for an unfocused server session", async ({ page }) =>
     .toEqual([
       {
         origin: serverA,
-        directory: undefined,
+        directory: directoryA,
         sessionID: sessionA.id,
         permissionID: "permission-background-a",
-        body: { reply: "once" },
+        body: { response: "once" },
       },
       {
         origin: serverA,
-        directory: undefined,
+        directory: directoryA,
         sessionID: childSessionA.id,
         permissionID: "permission-background-a-child",
-        body: { reply: "once" },
+        body: { response: "once" },
       },
     ])
 })
@@ -168,8 +168,8 @@ async function mockServers(page: Page, permissionRequests: string[], permissionR
     const remote = url.origin === serverB
     const directory = remote ? directoryB : directoryA
     const sessions = remote ? [sessionB] : [sessionA, childSessionA]
-    const requestDirectory = url.searchParams.get("location[directory]")
-    const response = url.pathname.match(/^\/api\/session\/([^/]+)\/permission\/([^/]+)\/reply$/)
+    const requestDirectory = url.searchParams.get("directory")
+    const response = url.pathname.match(/^\/session\/([^/]+)\/permissions\/([^/]+)$/)
     if (route.request().method() === "POST" && response) {
       permissionResponses.push({
         origin: url.origin,
@@ -181,21 +181,13 @@ async function mockServers(page: Page, permissionRequests: string[], permissionR
       return json(route, true)
     }
     if (requestDirectory && requestDirectory !== directory) return json(route, { name: "InvalidDirectory" }, 500)
-    if (url.pathname === "/api/event")
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
       return sse(route)
-    if (url.pathname === "/api/provider")
-      return json(route, {
-        location: { directory },
-        data: [{ id: remote ? "server-b" : "server-a", name: remote ? "Server B Provider" : "Server A Provider", package: "test" }],
-      })
-    if (url.pathname === "/api/model") return json(route, { location: { directory }, data: [model(remote)] })
-    if (url.pathname === "/api/model/default") return json(route, { location: { directory }, data: model(remote) })
-    if (url.pathname === "/api/agent") return json(route, { location: { directory }, data: [] })
-    if (url.pathname === "/api/permission/request") {
-      permissionRequests.push(url.toString())
-      return json(route, { location: { directory }, data: [] })
-    }
-    if (["/api/command", "/api/reference", "/api/question/request"].includes(url.pathname))
+    if (url.pathname === "/global/health") return json(route, { healthy: true })
+    if (url.pathname === "/api/provider" || url.pathname === "/api/model" || url.pathname === "/api/agent")
+      return json(route, { data: [] })
+    if (url.pathname === "/api/model/default") return json(route, { data: null })
+    if (["/api/command", "/api/reference", "/api/permission/request", "/api/question/request"].includes(url.pathname))
       return json(route, { location: { directory }, data: [] })
     if (url.pathname === "/api/mcp") return json(route, { location: { directory }, data: [] })
     if (url.pathname === "/api/mcp/resource")
@@ -219,6 +211,8 @@ async function mockServers(page: Page, permissionRequests: string[], permissionR
     if (currentSessionInfo) return json(route, { data: currentSession(currentSessionInfo) })
     if (sessions.some((session) => url.pathname === `/api/session/${session.id}/message`))
       return json(route, { data: [], cursor: {} })
+    const current = sessions.find((session) => url.pathname === `/session/${session.id}`)
+    if (current) return json(route, current)
     if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
     if (/^\/session\/[^/]+\/message$/.test(url.pathname)) return json(route, [])
     if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
@@ -228,6 +222,7 @@ async function mockServers(page: Page, permissionRequests: string[], permissionR
     }
     if (["/skill", "/command", "/lsp", "/formatter", "/question", "/vcs/diff", "/pty/shells"].includes(url.pathname))
       return json(route, [])
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
     if (url.pathname === "/provider") return json(route, provider(remote ? "server-b" : "server-a"))
     if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])
     if (url.pathname === "/project" || url.pathname === "/project/current") {
@@ -293,25 +288,6 @@ function provider(id: string) {
   }
 }
 
-function model(remote: boolean) {
-  const id = remote ? "server-b" : "server-a"
-  const name = remote ? "Server B" : "Server A"
-  return {
-    id,
-    modelID: id,
-    providerID: id,
-    name: `${name} Model`,
-    family: id,
-    capabilities: { tools: true, input: ["text"], output: ["text"] },
-    variants: [],
-    time: { released: Date.now() },
-    cost: [{ input: 0, output: 0, cache: { read: 0, write: 0 } }],
-    status: "active",
-    enabled: true,
-    limit: { context: 200_000, output: 32_000 },
-  }
-}
-
 function json(route: Route, body: unknown, status = 200) {
   return route.fulfill({
     status,

packages/app/e2e/regression/remote-tab-busy.spec.ts

@@ -58,18 +58,22 @@ async function mockServers(page: Page) {
     const current = url.origin === serverA ? sessionA : sessionB
     const directory = url.searchParams.get("directory")
     if (directory && directory !== current.directory) return json(route, { name: "InvalidDirectory" }, 500)
-    if (url.pathname === "/api/event")
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
       return sse(route, url.pathname === "/api/event")
+    if (url.pathname === "/global/health") return json(route, {}, 404)
     if (url.pathname === "/api/health") return json(route, { pid: 1 })
     if (url.pathname === "/api/session/active")
       return json(route, { data: url.origin === serverB ? { [sessionB.id]: { type: "running" } } : {} })
     if (url.pathname === "/api/session") return json(route, { data: [currentSession(current)], cursor: {} })
     if (url.pathname === `/api/session/${current.id}`) return json(route, { data: currentSession(current) })
     if (url.pathname === `/api/session/${current.id}/message`) return json(route, { data: [], cursor: {} })
+    if (url.pathname === `/session/${current.id}`) return json(route, current)
     if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
+    if (url.pathname === `/session/${current.id}/message`) return json(route, [])
     if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
     if (["/skill", "/command", "/lsp", "/formatter", "/permission", "/question", "/vcs/diff"].includes(url.pathname))
       return json(route, [])
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
     if (url.pathname === "/provider")
       return json(route, { all: [], connected: [], default: { providerID: "", modelID: "" } })
     if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])

packages/app/e2e/regression/review-open-file.spec.ts

@@ -127,7 +127,7 @@ test("opens and searches project files inline", async ({ page }) => {
   await expect(panel.getByRole("tab", { name: "nested.ts" })).toHaveAttribute("data-selected", "")
   await expect(sidebarToggle).toBeEnabled()
   await expect(panel.getByText("contents:src/nested.ts", { exact: true })).toBeVisible()
-  expect(searches).toContainEqual({ query: "nested", dirs: "file", limit: 200 })
+  expect(searches).toContainEqual({ query: "nested", dirs: "false", limit: 200 })
 
   await panel.getByRole("button", { name: "Open file" }).click()
   await expect(panel.getByRole("tab", { name: "nested.ts" })).toHaveCount(1)

packages/app/e2e/regression/review-state-persistence.spec.ts

@@ -19,25 +19,36 @@ test("restores review mode and selected file per session", async ({ page }) => {
   await expectSessionTitle(page, titleA)
   await page.getByRole("button", { name: "Toggle review" }).click()
 
-  await selectFile(page, "alpha.ts")
+  await selectMode(page, "Git changes", "Branch changes")
+  await selectFile(page, "beta.ts")
 
   await switchSession(page, titleB)
   await expect(page.getByRole("button", { name: "Git changes" })).toBeVisible()
   await selectFile(page, "gamma.ts")
 
   await switchSession(page, titleA)
+  await expect(page.getByRole("button", { name: "Branch changes" })).toBeVisible()
+  await expectSelectedFile(page, "beta.ts")
+  await selectMode(page, "Branch changes", "Git changes")
   await expectSelectedFile(page, "alpha.ts")
+  await selectMode(page, "Git changes", "Branch changes")
+  await expectSelectedFile(page, "beta.ts")
 
   await page.reload()
   await expectSessionTitle(page, titleA)
-  await expect(page.getByRole("button", { name: "Git changes" })).toBeVisible()
-  await expectSelectedFile(page, "alpha.ts")
+  await expect(page.getByRole("button", { name: "Branch changes" })).toBeVisible()
+  await expectSelectedFile(page, "beta.ts")
 
   await switchSession(page, titleB)
   await expect(page.getByRole("button", { name: "Git changes" })).toBeVisible()
   await expectSelectedFile(page, "gamma.ts")
 })
 
+async function selectMode(page: Page, current: string, next: string) {
+  await page.getByRole("button", { name: current }).click()
+  await page.getByRole("option", { name: next }).dispatchEvent("click")
+}
+
 async function selectFile(page: Page, file: string) {
   await page.getByRole("button", { name: file }).click()
   await expectSelectedFile(page, file)
@@ -54,6 +65,7 @@ async function switchSession(page: Page, title: string) {
 
 async function setup(page: Page) {
   await mockOpenCodeServer(page, {
+    protocol: "v1",
     directory,
     project: {
       id: projectID,
@@ -77,27 +89,22 @@ async function setup(page: Page) {
     sessions: [session(sessionA, titleA, 1700000000000), session(sessionB, titleB, 1700000001000)],
     pageMessages: () => ({ items: [] }),
   })
-  await page.route(/\/api\/vcs(?:\?.*)?$/, (route) =>
+  await page.route(/\/vcs(?:\?.*)?$/, (route) =>
     route.fulfill({
       status: 200,
       contentType: "application/json",
-      body: JSON.stringify({
-        location: { directory, project: { id: projectID, directory, canonical: directory } },
-        data: { branch: "feature", defaultBranch: "dev" },
-      }),
+      body: JSON.stringify({ branch: "feature", default_branch: "dev" }),
     }),
   )
-  await page.route("**/api/vcs/diff**", (route) =>
+  await page.route("**/vcs/diff**", (route) =>
     route.fulfill({
       status: 200,
       contentType: "application/json",
-      body: JSON.stringify({
-        location: { directory, project: { id: projectID, directory, canonical: directory } },
-        data:
-          new URL(route.request().url()).searchParams.get("mode") === "branch"
-            ? [diff("src/alpha.ts"), diff("src/beta.ts")]
-            : [diff("src/alpha.ts"), diff("src/gamma.ts")],
-      }),
+      body: JSON.stringify(
+        new URL(route.request().url()).searchParams.get("mode") === "branch"
+          ? [diff("src/alpha.ts"), diff("src/beta.ts")]
+          : [diff("src/alpha.ts"), diff("src/gamma.ts")],
+      ),
     }),
   )
   await page.addInitScript(

packages/app/e2e/regression/review-terminal-stacked.spec.ts

@@ -25,6 +25,7 @@ test("keeps the review tree and terminal sized when both panels are open", async
   let detailFailures = 1
   await page.setViewportSize({ width: 1400, height: 900 })
   await mockOpenCodeServer(page, {
+    protocol: "v1",
     directory,
     project: {
       id: projectID,
@@ -61,32 +62,33 @@ test("keeps the review tree and terminal sized when both panels are open", async
     events: () => events.splice(0, 1),
     eventRetry: 16,
   })
-  await page.route(/\/api\/vcs(?:\?.*)?$/, (route) =>
+  await page.route(/\/vcs(?:\?.*)?$/, (route) =>
     route.fulfill({
       status: 200,
       contentType: "application/json",
       body: JSON.stringify({
-        location: { directory, project: { id: projectID, directory, canonical: directory } },
-        data: { branch: "review-pane-performance", defaultBranch: "dev" },
+        branch: "review-pane-performance",
+        default_branch: "dev",
       }),
     }),
   )
-  await page.route("**/api/vcs/diff**", (route) => {
+  await page.route("**/vcs/diff**", (route) => {
     const url = new URL(route.request().url())
-    const scope = url.searchParams.get("location[directory]")?.replaceAll("\\", "/")
+    const scope = url.searchParams.get("directory")?.replaceAll("\\", "/")
     const detail = scope?.endsWith("/src/branch/d00027")
     if (detail && detailFailures-- > 0) return route.fulfill({ status: 500, body: "retry detail" })
     return route.fulfill({
       status: 200,
       contentType: "application/json",
-      body: JSON.stringify({
-        location: { directory, project: { id: projectID, directory, canonical: directory } },
-        data: detail
-          ? branchDiffs
-              .filter((diff) => diff.file.startsWith("src/branch/d00027/"))
-              .map((diff) => fileDiff(diff.file, diff.additions, true, detailVersion))
-          : branchDiffs,
-      }),
+      body: JSON.stringify(
+        url.searchParams.get("mode") === "branch"
+          ? detail
+            ? branchDiffs
+                .filter((diff) => diff.file.startsWith("src/branch/d00027/"))
+                .map((diff) => fileDiff(diff.file, diff.additions, true, detailVersion))
+            : branchDiffs
+          : Array.from({ length: 7 }, (_, index) => fileDiff(`src/git-${index}.ts`, 1)),
+      ),
     })
   })
   await page.route("**/pty*", (route) =>
@@ -107,7 +109,7 @@ test("keeps the review tree and terminal sized when both panels are open", async
       }),
     }),
   )
-  await page.route("**/api/pty/pty_review_terminal*", (route) =>
+  await page.route("**/pty/pty_review_terminal*", (route) =>
     route.fulfill({
       status: 200,
       contentType: "application/json",
@@ -125,7 +127,7 @@ test("keeps the review tree and terminal sized when both panels are open", async
       }),
     }),
   )
-  await page.route("**/api/pty/pty_review_terminal/connect-token*", (route) =>
+  await page.route("**/pty/pty_review_terminal/connect-token*", (route) =>
     route.fulfill({
       status: 200,
       contentType: "application/json",
@@ -135,7 +137,7 @@ test("keeps the review tree and terminal sized when both panels are open", async
       }),
     }),
   )
-  await page.routeWebSocket("**/api/pty/pty_review_terminal/connect", () => undefined)
+  await page.routeWebSocket("**/pty/pty_review_terminal/connect", () => undefined)
   await page.addInitScript(() => {
     localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
     localStorage.setItem(
@@ -147,7 +149,9 @@ test("keeps the review tree and terminal sized when both panels are open", async
   await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
   await expectSessionTitle(page, title)
   await expect(page.locator("#review-panel")).toBeVisible()
-  await expectTree(page, 2_773, "action.yml")
+  await expectTree(page, 8, "git-0.ts")
+
+  await selectMode(page, "Git changes", "Branch changes")
   await expect(page.locator("#session-side-panel-review-tab")).toHaveText("Files Changed 2740")
   await page.keyboard.press("Control+Backquote")
   await expect(page.locator("#terminal-panel")).toBeVisible()
@@ -170,9 +174,9 @@ test("keeps the review tree and terminal sized when both panels are open", async
   expect(bottomGap).toBeLessThanOrEqual(16)
   const lazyDiff = page.waitForRequest((request) => {
     const url = new URL(request.url())
-      return (
-        url.pathname === "/api/vcs/diff" &&
-      url.searchParams.get("location[directory]")?.replaceAll("\\", "/").endsWith("/src/branch/d00027") === true
+    return (
+      url.pathname === "/vcs/diff" &&
+      url.searchParams.get("directory")?.replaceAll("\\", "/").endsWith("/src/branch/d00027") === true
     )
   })
   await lastFile.click()
@@ -186,46 +190,59 @@ test("keeps the review tree and terminal sized when both panels are open", async
   const refreshedDiff = page.waitForRequest((request) => {
     const url = new URL(request.url())
     return (
-      url.pathname === "/api/vcs/diff" &&
-      url.searchParams.get("location[directory]")?.replaceAll("\\", "/").endsWith("/src/branch/d00027") === true
+      url.pathname === "/vcs/diff" &&
+      url.searchParams.get("directory")?.replaceAll("\\", "/").endsWith("/src/branch/d00027") === true
     )
   })
   sessionStatus[sessionID] = { type: "idle" }
   events.push(statusEvent("idle"))
   await refreshedDiff
   await expect(preview).toContainText("after-2")
+  await selectMode(page, "Branch changes", "Git changes")
+  await expectTree(page, 8, "git-0.ts")
+  await page.getByRole("button", { name: "git-0.ts" }).click()
+  await selectMode(page, "Git changes", "Branch changes")
+  await expectTree(page, 2_773, "action.yml")
+
   const filter = page.getByRole("searchbox", { name: "Filter files" })
   await filter.fill("generated-2738")
   await expectTree(page, 1, "generated-2738.ts")
   await filter.fill("")
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
 
   await page.getByRole("button", { name: "Toggle file tree" }).click()
   await expect(page.locator('[data-slot="session-review-v2-sidebar"]')).toHaveCount(0)
   await expect(page.locator('#review-panel [data-component="file-tree-v2"]')).toHaveCount(0)
   await page.getByRole("button", { name: "Toggle file tree" }).click()
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
 
   await page.keyboard.press("Control+Backquote")
   await expect(page.locator("#terminal-panel")).toHaveCount(0)
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
   await page.keyboard.press("Control+Backquote")
   await expect(page.locator("#terminal-panel")).toBeVisible()
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
 
   await page.getByRole("button", { name: "Toggle review" }).click()
   await expect(page.locator("#review-panel")).toHaveCount(0)
   await page.getByRole("button", { name: "Toggle review" }).click()
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
   await page.setViewportSize({ width: 1_000, height: 700 })
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
   await expectStackGeometry(page)
   await page.setViewportSize({ width: 1_000, height: 120 })
   await page.setViewportSize({ width: 1_400, height: 900 })
-  await expectTree(page, 2_773, "generated-2738.ts")
+  await expectTree(page, 2_773, "action.yml")
   await expectStackGeometry(page)
 })
 
+async function selectMode(page: Page, current: string, next: string) {
+  await page.getByRole("button", { name: current }).click()
+  const option = page.getByRole("option", { name: next })
+  await expect(option).toBeVisible()
+  await option.click()
+}
+
 async function expectTree(page: Page, total: number, file: string) {
   await expectMountedTree(page, total)
   await expect(page.getByRole("button", { name: file })).toBeVisible()

packages/app/e2e/regression/session-request-docks.spec.ts

@@ -173,6 +173,7 @@ async function mockServer(
   },
 ) {
   await mockOpenCodeServer(page, {
+    protocol: "v2",
     directory,
     project: {
       id: projectID,

packages/app/e2e/regression/session-timeline-collapse-state.spec.ts

@@ -52,7 +52,7 @@ const editPart = {
   sessionID,
   messageID: assistantMessageID,
   type: "tool",
-  callID: editPartID,
+  callID: "call_edit_regression",
   tool: "edit",
   state: {
     status: "completed",

packages/app/e2e/regression/session-timeline-context-resize.spec.ts

@@ -14,8 +14,8 @@ const projectID = "proj_context_resize_regression"
 const sessionID = "ses_context_resize_regression"
 const title = "Context resize regression"
 const model = { providerID: "opencode", modelID: "claude-opus-4-6", variant: "max" }
-const contextIDs = ["ctx_0100_read", "ctx_0101_glob", "ctx_0102_grep", "ctx_0103_list"]
-const followingTextID = `${id("msg_assistant", 10)}:text:0`
+const contextIDs = ["prt_0100_read", "prt_0101_glob", "prt_0102_grep", "prt_0103_list"]
+const followingTextID = "prt_0104_text"
 
 type Message = {
   info: Record<string, unknown> & { id: string; role: "user" | "assistant" }
@@ -263,7 +263,7 @@ function turn(index: number, target: boolean, status: "running" | "completed" =
             ),
             contextTool(contextIDs[3]!, assistantID, "list", { path: "src" }, status),
             {
-              id: "prt_0104_text",
+              id: followingTextID,
               sessionID,
               messageID: assistantID,
               type: "text",
@@ -295,7 +295,7 @@ function contextTool(
     sessionID,
     messageID,
     type: "tool",
-    callID: partID,
+    callID: `call_${partID}`,
     tool,
     state: {
       status,

packages/app/e2e/regression/session-timeline-history-root.spec.ts

@@ -10,6 +10,7 @@ import {
   status,
   textPart,
   title,
+  userID,
   userMessage,
 } from "../performance/timeline-stability/fixture"
 import { mockOpenCodeServer } from "../utils/mock-server"
@@ -18,22 +19,18 @@ import { expectSessionTitle } from "../utils/waits"
 
 const initialPageSize = 20
 const historyPageSize = 200
-const messages = Array.from({ length: initialPageSize + 1 }, (_, index) => {
-  const id = `msg_${String(index + 1001).padStart(4, "0")}_history_root_user`
-  return [
-    userMessage(undefined, { id, created: 1700000000000 + index * 2_000 }),
-    assistantMessage([textPart(`prt_history_root_${index}`, `Assistant response ${index}`)], {
-      id: `msg_${String(index + 1001).padStart(4, "0")}_history_root_assistant`,
-      parentID: id,
-      created: 1700000001000 + index * 2_000,
-      completed: index < initialPageSize,
-    }),
-  ]
-}).flat()
-const assistants = messages.filter((message) => message.info.role === "assistant")
+const assistants = Array.from({ length: initialPageSize + 1 }, (_, index) =>
+  assistantMessage([textPart(`prt_history_root_${index}`, `Assistant response ${index}`)], {
+    id: `msg_${String(index + 1001).padStart(4, "0")}_history_root_assistant`,
+    parentID: userID,
+    created: 1700000001000 + index * 1_000,
+    completed: index < initialPageSize,
+  }),
+)
+const messages = [userMessage(), ...assistants]
 const lastAssistant = assistants.at(-1)!
-const lastPartID = `${assistants.at(-1)!.info.id}:text:0`
-const userPartID = `${messages.at(-2)!.info.id}:text:0`
+const lastPartID = assistants.at(-1)!.parts[0]!.id
+const userPartID = `prt_${userID}_text`
 const completed = {
   ...lastAssistant.info,
   time: { ...lastAssistant.info.time, completed: lastAssistant.info.time.created + 15_000 },
@@ -157,23 +154,15 @@ for (const scenario of scenarios) {
     await expectSessionTitle(page, title)
     await expect(page.locator(`[data-timeline-part-id="${lastPartID}"]`)).toBeVisible()
     await expect(page.locator(`[data-timeline-part-id="${userPartID}"]`)).toBeVisible()
-    const viewport = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
-    await viewport.hover()
-    const deadline = Date.now() + 10_000
-    while (requests.filter((request) => request.phase === "start").length < 2) {
-      if (Date.now() >= deadline) throw new Error("Timed out scrolling to the history boundary")
-      await page.mouse.wheel(0, -240)
-      await page.waitForTimeout(20)
-    }
+    await expect.poll(() => requests.filter((request) => request.phase === "start").length).toBe(2)
     expect(requests.filter((request) => request.phase === "end")).toHaveLength(1)
-    expect(sequence.slice(0, 3)).toEqual([
+    expect(sequence.slice(0, 4)).toEqual([
       "messages:start:latest",
       "messages:end:latest",
+      `message:${userID}`,
       `messages:start:${messages.at(-initialPageSize)!.info.id}`,
     ])
-    await expect(page.locator('[data-timeline-part-id*="_history_root_assistant:text:0"]')).toHaveCount(
-      initialPageSize / 2,
-    )
+    await expect(page.locator('[data-timeline-part-id^="prt_history_root_"]')).toHaveCount(initialPageSize)
     await page.evaluate(() => {
       ;(
         window as Window & {
@@ -185,9 +174,7 @@ for (const scenario of scenarios) {
     expect(await visibleContentHidden(page)).toBe(false)
     const beforeHistory = await probeSamples(page)
     history.resolve()
-    await expect
-      .poll(() => page.locator('[data-timeline-part-id*="_history_root_assistant:text:0"]').count())
-      .toBeGreaterThan(initialPageSize / 2)
+    await expect(page.locator('[data-timeline-part-id^="prt_history_root_"]')).toHaveCount(assistants.length)
     await expect.poll(() => requests.filter((request) => request.phase === "end").length).toBe(2)
     await expect(page.getByRole("button", { name: "Stop" })).toBeVisible()
     await waitForProbeSamples(page, beforeHistory)
@@ -195,7 +182,7 @@ for (const scenario of scenarios) {
       { before: undefined, limit: initialPageSize },
       { before: messages.at(-initialPageSize)!.info.id, limit: historyPageSize },
     ])
-    expect(roots).toEqual([])
+    expect(roots).toEqual([{ sessionID, messageID: userID }])
 
     const message = messageUpdated(scenario.info)
     const idle = status("idle")

packages/app/e2e/regression/session-timeline-lifecycle-state.spec.ts

@@ -103,7 +103,7 @@ test("moves busy through retry and recovery to final idle content", async ({ pag
   await timeline.send(status("idle"), 350)
   await expect(page.locator('[data-timeline-row="Retry"]')).toHaveCount(0)
   await expect(page.locator('[data-timeline-row="Thinking"]')).toHaveCount(0)
-  await expect(page.locator('[data-timeline-part-id="prt_recovered"]')).toContainText("Recovered response")
+  await expect(page.locator('[data-timeline-row="DiffSummary"]')).toBeVisible()
 })
 
 function lines(count: number) {

packages/app/e2e/regression/session-timeline-projection.spec.ts

@@ -89,6 +89,7 @@ test.describe("session timeline projection", () => {
     const aborted = assistantMessage(
       [
         { id: "prt_before_abort", type: "text", text: "Before interruption" },
+        { id: "prt_compaction", type: "compaction", auto: true },
       ],
       {
         id: "msg_1001_assistant_aborted",
@@ -121,13 +122,13 @@ test.describe("session timeline projection", () => {
     await scroller.evaluate((element) => (element.scrollTop = 0))
 
     await expect(page.locator('[data-timeline-row="TurnDivider"]')).toHaveCount(1)
-    await expect(page.getByText("Before interruption", { exact: true })).toBeVisible()
+    await expect(page.getByText("Session compacted", { exact: true })).toBeVisible()
     await expect(page.getByText("Visible provider failure")).toBeVisible()
     await scroller.evaluate((element) => (element.scrollTop = element.scrollHeight))
     await expect(page.locator('[data-timeline-row="TurnGap"]')).toBeVisible()
   })
 
-  test("renders legacy synthetic comments as ordinary V2 user text", async ({ page }) => {
+  test("renders comment strips and historical diff summary overflow", async ({ page }) => {
     const user = userMessage(
       [
         userText("The user made the following comment regarding lines 4 through 8 of src/a.ts: Keep this stable", {
@@ -158,14 +159,10 @@ test.describe("session timeline projection", () => {
     const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
     await scroller.evaluate((element) => (element.scrollTop = 0))
 
-    await expect(
-      page.getByText(
-        "The user made the following comment regarding lines 4 through 8 of src/a.ts: Keep this stable Continue after the comment",
-        { exact: true },
-      ),
-    ).toBeVisible()
-    await expect(page.locator('[data-timeline-row="CommentStrip"]')).toHaveCount(0)
-    await expect(page.locator('[data-timeline-row="DiffSummary"]')).toHaveCount(0)
+    await expect(page.locator('[data-timeline-row="CommentStrip"]')).toBeVisible()
+    await expect(page.getByText("Keep this stable", { exact: true })).toBeVisible()
+    await expect(page.locator('[data-timeline-row="DiffSummary"]')).toBeVisible()
+    await expect(page.getByText(/show all/i)).toBeVisible()
   })
 
   test("renders interruption independently when the turn is not compacted", async ({ page }) => {

packages/app/e2e/regression/session-timeline-reasoning-projection.spec.ts

@@ -1,6 +1,5 @@
 import { expect, test } from "@playwright/test"
 import {
-  assistantID,
   assistantMessage,
   reasoningPart,
   setupTimeline,
@@ -71,7 +70,7 @@ for (const profile of profiles) {
     await timeline.send(status("busy"), 150)
 
     await expect(page.locator('[data-timeline-row="Thinking"]')).toHaveCount(profile.thinking ? 1 : 0)
-    await expect(page.locator(`[data-timeline-part-id="${assistantID}:reasoning:0"]`)).toHaveCount(profile.body ? 1 : 0)
+    await expect(page.locator(`[data-timeline-part-id="${reasoningID}"]`)).toHaveCount(profile.body ? 1 : 0)
     if (!profile.summaries && profile.reasoning.trim()) {
       await expect(page.getByText("Inspecting stability", { exact: true })).toBeVisible()
     }
@@ -90,5 +89,5 @@ test("does not infer reasoning visibility from provider identity", async ({ page
 
   await expect(page.locator('[data-timeline-row="Thinking"]')).toHaveCount(0)
   await expect(page.locator('[data-timeline-part-id*="reasoning"]')).toHaveCount(0)
-  await expect(page.locator(`[data-timeline-part-id="${assistantID}:text:0"]`)).toBeVisible()
+  await expect(page.locator('[data-timeline-part-id="prt_provider_text"]')).toBeVisible()
 })

packages/app/e2e/regression/session-timeline-reducer-projection.spec.ts

@@ -23,11 +23,10 @@ test("groups singleton and separated context operations at correct boundaries",
   ]
   await setupTimeline(page, { messages: [userMessage(), assistantMessage(parts)] })
 
-  await expect(
-    page.locator('[data-timeline-part-ids="prt_boundary_01_read,prt_boundary_03_glob,prt_boundary_04_grep"]'),
-  ).toBeVisible()
+  await expect(page.locator('[data-timeline-part-ids="prt_boundary_01_read"]')).toBeVisible()
+  await expect(page.locator('[data-timeline-part-ids="prt_boundary_03_glob,prt_boundary_04_grep"]')).toBeVisible()
   await expect(page.locator('[data-timeline-part-ids="prt_boundary_06_list"]')).toBeVisible()
-  await expect(page.locator('[data-timeline-row="AssistantPart"]')).toHaveCount(4)
+  await expect(page.locator('[data-timeline-row="AssistantPart"]')).toHaveCount(5)
 })
 
 test("reducer-hardening: converges when idle arrives before final part and message completion", async ({ page }) => {

packages/app/e2e/regression/session-timeline-shell-outline.spec.ts

@@ -145,6 +145,7 @@ test("allows paint rounding for every framed row but not fixed turn gaps", async
       }),
     ],
   })
+  await expect(page.locator('[data-timeline-row="DiffSummary"]')).toBeVisible()
   await expect(page.locator('[data-timeline-row="TurnGap"]')).toBeVisible()
 
   const rows = await page.locator("[data-timeline-key]").evaluateAll((elements) =>

packages/app/e2e/regression/session-timeline-transport.spec.ts

@@ -90,7 +90,7 @@ test("reconnects after a stream error", async ({ page }) => {
 })
 
 test("does not request replay when reconnecting the volatile V2 event stream", async ({ page }) => {
-  const timeline = await setupTimeline(page, { eventRetry: 10 })
+  const timeline = await setupTimeline(page, { eventRetry: 10, protocol: "v2" })
   const first = await timeline.transport.send(partUpdated(textPart("prt_transport_id", "event with id")), {
     id: "timeline-event-7",
   })
@@ -107,10 +107,10 @@ test("passes through non-event fetches", async ({ page }) => {
   const timeline = await setupTimeline(page)
 
   const health = await page.evaluate(async () => {
-    const response = await fetch("/api/health")
+    const response = await fetch("/global/health")
     return response.json()
   })
 
-  expect(health).toEqual({ healthy: true, version: "2.0.0", pid: 1 })
+  expect(health).toEqual({ healthy: true })
   expect(await timeline.transport.connections()).toHaveLength(1)
 })

packages/app/e2e/regression/session-todo-dock-navigation.spec.ts

@@ -23,7 +23,7 @@ type EventPayload = {
 
 test.use({ viewport: { width: 1440, height: 900 }, reducedMotion: "no-preference" })
 
-test("animates todo opening without replaying it across session tabs", async ({ page }) => {
+test("animates todo lifecycle without replaying it across session tabs", async ({ page }) => {
   test.setTimeout(90_000)
   const events: EventPayload[] = []
   const todos: Record<string, typeof activeTodos> = { [sourceID]: [], [otherID]: [] }
@@ -86,8 +86,28 @@ test("animates todo opening without replaying it across session tabs", async ({
   await switchSession(page, otherID, otherTitle)
   await expect(dock).toHaveCount(0)
 
+  const returningOpen = sampleDock(page, 700)
+  await switchSession(page, sourceID, sourceTitle)
+  const openSamples = (await returningOpen).filter((sample) => sample.present)
+  expect(openSamples.length).toBeGreaterThan(0)
+  expect(openSamples[0]!.opacity).toBeGreaterThan(0.98)
+  expect(openSamples[0]!.height).toBeGreaterThan(70)
+  await expect(dock.locator('[data-state="in_progress"]')).toHaveCount(1)
+
+  const completedTodos = activeTodos.map((todo) => ({ ...todo, status: "completed" }))
+  const closing = sampleDock(page, 1_000)
+  todos[sourceID] = completedTodos
+  events.push(todoEvent(sourceID, completedTodos))
+  await expect(dock).toHaveCount(0)
+  expect((await closing).some((sample) => sample.opacity > 0.05 && sample.opacity < 0.95)).toBe(true)
+  todos[sourceID] = []
+  events.push(todoEvent(sourceID, []))
+
+  await switchSession(page, otherID, otherTitle)
+  const returningEmpty = sampleDock(page, 700)
   await switchSession(page, sourceID, sourceTitle)
   await expect(dock).toHaveCount(0)
+  expect((await returningEmpty).every((sample) => !sample.present)).toBe(true)
 })
 
 function session(id: string, title: string, created: number) {

packages/app/e2e/regression/tab-navigate-mousedown.spec.ts

@@ -89,19 +89,23 @@ async function mockServer(page: Page) {
     if (url.origin !== server) return route.fallback()
     if ([`/api/session/${unresolvedSessionID}`, `/session/${unresolvedSessionID}`].includes(url.pathname))
       return new Promise(() => {})
-    if (url.pathname === "/api/event")
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
       return sse(route)
+    if (url.pathname === "/global/health") return json(route, { healthy: true })
     if (url.pathname === "/api/session") return json(route, { data: sessions.map(currentSession), cursor: {} })
     if (url.pathname === "/api/session/active") return json(route, { data: {} })
     const currentSessionInfo = sessions.find((item) => url.pathname === `/api/session/${item.id}`)
     if (currentSessionInfo) return json(route, { data: currentSession(currentSessionInfo) })
     if (sessions.some((item) => url.pathname === `/api/session/${item.id}/message`))
       return json(route, { data: [], cursor: {} })
+    const byId = sessions.find((item) => url.pathname === `/session/${item.id}`)
+    if (byId) return json(route, byId)
     if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
     if (/^\/session\/[^/]+\/message$/.test(url.pathname)) return json(route, [])
     if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
     if (["/skill", "/command", "/lsp", "/formatter", "/permission", "/question", "/vcs/diff"].includes(url.pathname))
       return json(route, [])
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
     if (url.pathname === "/provider")
       return json(route, { all: [], connected: [], default: { providerID: "", modelID: "" } })
     if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])

packages/app/e2e/regression/terminal-hidden.spec.ts

@@ -10,6 +10,7 @@ const title = "Hidden terminal regression"
 test("unmounts the terminal panel while it is hidden", async ({ page }) => {
   await page.setViewportSize({ width: 1400, height: 900 })
   await mockOpenCodeServer(page, {
+    protocol: "v2",
     directory,
     project: {
       id: projectID,

packages/app/e2e/regression/terminal-tab-switch.spec.ts

@@ -66,6 +66,7 @@ async function readProbe(page: Page) {
 
 async function setup(page: Page) {
   await mockOpenCodeServer(page, {
+    protocol: "v2",
     directory,
     project: {
       id: projectID,

packages/app/e2e/smoke/session-timeline.fixture.ts

@@ -21,7 +21,7 @@ const words = [
   "vector",
 ]
 
-const serverKey = `http://127.0.0.1:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+const serverKey = "http://127.0.0.1:4096"
 const sourceID = "ses_smoke_source"
 const targetID = "ses_smoke_target"
 const directory = "C:/OpenCode/SmokeProject"
@@ -134,7 +134,7 @@ function toolPart(
   return {
     id: id(`prt_tool_${tool}_${partIndex}`, index),
     type: "tool",
-    callID: id("call", index * 100 + partIndex),
+    callID: id("call", index * 10 + partIndex),
     tool,
     state: {
       status: "completed",
@@ -235,17 +235,8 @@ function renderable(part: MessagePart) {
   return part.type !== "step-start" && part.type !== "step-finish" && part.type !== "patch"
 }
 
-function currentPartIDs(message: Message) {
-  const ordinals = { text: 0, reasoning: 0 }
-  return message.parts
-    .flatMap((part) => {
-      if (!renderable(part)) return []
-      if (part.type === "text") return [`${message.info.id}:text:${ordinals.text++}`]
-      if (part.type === "reasoning") return [`${message.info.id}:reasoning:${ordinals.reasoning++}`]
-      if (part.type === "tool") return [typeof part.callID === "string" ? part.callID : part.id]
-      return []
-    })
-    .sort()
+function orderedParts(message: Message) {
+  return message.parts.slice().sort((a, b) => a.id.localeCompare(b.id))
 }
 
 export const fixture = {
@@ -299,10 +290,12 @@ export const fixture = {
     targetMessageIDs: targetMessages
       .filter((message) => message.info.role === "user")
       .map((message) => message.info.id),
-    targetPartIDs: targetMessages.flatMap(currentPartIDs),
-    expandedShellPartID: targetMessages
-      .flatMap((message) => message.parts)
-      .find((part) => part.tool === "bash")!.callID,
+    targetPartIDs: targetMessages.flatMap((message) =>
+      orderedParts(message)
+        .filter(renderable)
+        .map((part) => part.id),
+    ),
+    expandedShellPartID: targetMessages.flatMap((message) => message.parts).find((part) => part.tool === "bash")!.id,
   },
 }
 

packages/app/e2e/smoke/session-timeline.spec.ts

@@ -125,19 +125,20 @@ test.describe("smoke: session timeline", () => {
     })
     await configureSmokePage(page, fixture.directory)
     await page.addInitScript(
-      ({ server, sourceID, targetID }) => {
+      ({ dirBase64, sourceID, targetID }) => {
         localStorage.setItem(
           "opencode.window.browser.dat:tabs",
           JSON.stringify(
             [sourceID, targetID].map((sessionId) => ({
               type: "session",
-              server,
+              server: "http://127.0.0.1:4096",
+              dirBase64,
               sessionId,
             })),
           ),
         )
       },
-      { server: fixture.serverKey, sourceID: fixture.sourceID, targetID: fixture.targetID },
+      { dirBase64: base64Encode(fixture.directory), sourceID: fixture.sourceID, targetID: fixture.targetID },
     )
 
     await page.goto(`/${base64Encode(fixture.directory)}/session/${fixture.targetID}`)
@@ -250,19 +251,20 @@ test.describe("smoke: session timeline", () => {
     })
     await configureSmokePage(page, fixture.directory)
     await page.addInitScript(
-      ({ server, sourceID, targetID }) => {
+      ({ dirBase64, sourceID, targetID }) => {
         localStorage.setItem(
           "opencode.window.browser.dat:tabs",
           JSON.stringify(
             [sourceID, targetID].map((sessionId) => ({
               type: "session",
-              server,
+              server: "http://127.0.0.1:4096",
+              dirBase64,
               sessionId,
             })),
           ),
         )
       },
-      { server: fixture.serverKey, sourceID: fixture.sourceID, targetID: fixture.targetID },
+      { dirBase64: base64Encode(fixture.directory), sourceID: fixture.sourceID, targetID: fixture.targetID },
     )
     await page.goto(`/${base64Encode(fixture.directory)}/session/${fixture.sourceID}`)
     await expectSessionTitle(page, fixture.expected.sourceTitle)

packages/app/e2e/tsconfig.json

@@ -12,7 +12,6 @@
     "./performance/unit/visual-stability.test.ts",
     "./reproduction/timeline-suspense/**/*.ts",
     "./reproduction/timeline-suspense/**/*.tsx",
-    "../src/types.ts",
     "../src/pages/session/timeline/observe-element-offset.ts",
     "./regression/new-session-panel-corner.spec.ts",
     "./regression/session-timeline-context-resize.spec.ts",

packages/app/e2e/user-story/model-selection-flow.spec.ts

@@ -4,7 +4,11 @@ import { expectAppVisible } from "../utils/waits"
 
 const directory = "C:/OpenCode/NewProject"
 
-test("creates a session in a new project and selects its model", async ({ page }) => {
+test("creates a session in a new project, connects OpenCode Go, and selects its model", async ({ page }) => {
+  let connectedGo = false
+  let pendingGo = false
+  const connections: Array<{ integrationID: string; body: unknown }> = []
+
   await mockOpenCodeServer(page, {
     directory,
     project: {
@@ -42,9 +46,17 @@ test("creates a session in a new project and selects its model", async ({ page }
           },
         },
       ],
-      connected: ["opencode", "opencode-go"],
+      connected: connectedGo ? ["opencode", "opencode-go"] : ["opencode"],
       default: { providerID: "opencode", modelID: "free-model" },
     }),
+    integrationMethods: { "opencode-go": [{ type: "api", label: "API key" }] },
+    onConnectKey: (input) => {
+      connections.push(input)
+      if (input.integrationID === "opencode-go") pendingGo = true
+    },
+    onInstanceDispose: () => {
+      if (pendingGo) connectedGo = true
+    },
     sessions: [],
     pageMessages: () => ({ items: [] }),
     fileList: (path) =>
@@ -54,17 +66,6 @@ test("creates a session in a new project and selects its model", async ({ page }
   await page.addInitScript(() => {
     localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
     localStorage.setItem("opencode.global.dat:server", JSON.stringify({ projects: { local: [] } }))
-    localStorage.setItem(
-      "opencode.global.dat:model",
-      JSON.stringify({
-        user: [
-          { providerID: "opencode", modelID: "free-model", visibility: "show" },
-          { providerID: "opencode-go", modelID: "go-model-1", visibility: "show" },
-        ],
-        recent: [],
-        variant: {},
-      }),
-    )
   })
 
   await page.goto("/")
@@ -78,7 +79,16 @@ test("creates a session in a new project and selects its model", async ({ page }
 
   const modelControl = page.locator('[data-action="prompt-model"]')
   await modelControl.click()
-  await expect(page.locator('[data-option-key="opencode:free-model"]')).toBeVisible()
+  await expect(page.locator('[data-section="free-models"]')).toContainText("Free models provided by OpenCode")
+
+  await page.locator('[data-provider-id="opencode-go"]').click()
+  await page.locator('[data-input="provider-api-key"]').fill("mock-go-api-key")
+  await page.locator('[data-action="provider-connect-submit"]').click()
+  await expect(page.locator('[data-component="dialog-v2"]')).toHaveCount(0)
+  expect(connections).toEqual([{ integrationID: "opencode-go", body: { type: "api", key: "mock-go-api-key" } }])
+
+  await expect(modelControl).toHaveAttribute("data-control-type", "popover")
+  await modelControl.click()
   const goModel = page.locator('[data-option-key="opencode-go:go-model-1"]')
   await expect(goModel).toBeVisible()
   await goModel.click()

packages/app/e2e/utils/mock-server.ts

@@ -1,17 +1,14 @@
 import type { Page, Route } from "@playwright/test"
-import type {
-  JsonValue,
-  PromptAgentAttachment,
-  PromptFileAttachment,
-  SessionMessageAssistant,
-  SessionMessageInfo,
-  SessionStructuredError,
-} from "@opencode-ai/client/promise"
+
+const emptyList = new Set(["/skill", "/command", "/lsp", "/formatter", "/vcs/status", "/vcs/diff"])
+const emptyObject = new Set(["/global/config", "/config", "/provider/auth", "/mcp", "/experimental/resource"])
 
 export interface MockServerConfig {
+  protocol?: "v1" | "v2"
   provider: unknown | (() => unknown)
   integrationMethods?: Record<string, unknown[]>
   onConnectKey?: (input: { integrationID: string; body: unknown }) => void
+  onInstanceDispose?: () => void
   directory: string
   project: unknown
   sessions: ({ id: string } & Record<string, unknown>)[]
@@ -36,6 +33,21 @@ export interface MockServerConfig {
 export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
   const cursors = new Map<string, string>()
   let nextCursor = 0
+  const staticRoutes: Record<string, unknown> = {
+    "/path": {
+      state: config.directory,
+      config: config.directory,
+      worktree: config.directory,
+      directory: config.directory,
+      home: "C:/OpenCode",
+    },
+    "/project": [config.project],
+    "/project/current": config.project,
+    "/agent": [{ name: "build", mode: "primary" }],
+    "/vcs": { branch: "main", default_branch: "main" },
+    "/session": config.sessions,
+  }
+
   await page.route("**/*", async (route) => {
     const url = new URL(route.request().url())
     const targetPort = process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"
@@ -45,15 +57,61 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
     if (url.port !== targetPort && url.port !== appPort) return route.fallback()
 
     const path = url.pathname
-    if (path === "/api/event") {
+    if (path === "/global/event" || path === "/event" || path === "/api/event") {
       const events = config.events?.()
       return sse(
         route,
-        [{ id: "evt_mock_connected", type: "server.connected", data: {} }, ...(events?.map(currentEvent) ?? [])],
+        path === "/api/event"
+          ? [{ id: "evt_mock_connected", type: "server.connected", data: {} }, ...(events?.map(currentEvent) ?? [])]
+          : [
+              ...(path === "/global/event"
+                ? [{ payload: { id: "evt_mock_connected", type: "server.connected", properties: {} } }]
+                : []),
+              ...(events ?? []),
+            ],
         config.eventRetry,
       )
     }
-    if (path === "/api/health") return json(route, { healthy: true, version: "2.0.0", pid: 1 })
+    if (path === "/global/health")
+      return config.protocol === "v2" ? json(route, {}, undefined, 404) : json(route, { healthy: true })
+    if (path === "/api/health" && config.protocol === "v2")
+      return json(route, { healthy: true, version: "2.0.0", pid: 1 })
+    if (path === "/experimental/capabilities") return json(route, { backgroundSubagents: true })
+    if (path === "/provider")
+      return json(route, typeof config.provider === "function" ? config.provider() : config.provider)
+    if (path === "/provider/auth") return json(route, config.integrationMethods ?? {})
+    const legacyAuth = path.match(/^\/auth\/([^/]+)$/)?.[1]
+    if (legacyAuth && route.request().method() === "PUT") {
+      config.onConnectKey?.({ integrationID: legacyAuth, body: route.request().postDataJSON() })
+      return json(route, true)
+    }
+    if (path === "/instance/dispose" && route.request().method() === "POST") {
+      config.onInstanceDispose?.()
+      return json(route, true)
+    }
+    if (path === "/permission")
+      return json(route, typeof config.permissions === "function" ? config.permissions() : (config.permissions ?? []))
+    if (path === "/question")
+      return json(route, typeof config.questions === "function" ? config.questions() : (config.questions ?? []))
+    if (path === "/session/status")
+      return json(
+        route,
+        typeof config.sessionStatus === "function" ? config.sessionStatus() : (config.sessionStatus ?? {}),
+      )
+    if (path === "/vcs/diff" && config.vcsDiff) return json(route, config.vcsDiff)
+    if (path === "/file" && config.fileList)
+      return json(route, await config.fileList(url.searchParams.get("path") ?? ""))
+    if (path === "/file/content" && config.fileContent)
+      return json(route, await config.fileContent(url.searchParams.get("path") ?? ""))
+    if (path === "/find/file" && config.findFiles)
+      return json(
+        route,
+        await config.findFiles({
+          query: url.searchParams.get("query") ?? "",
+          dirs: url.searchParams.get("dirs") ?? undefined,
+          limit: url.searchParams.has("limit") ? Number(url.searchParams.get("limit")) : undefined,
+        }),
+      )
     if (path === "/api/reference")
       return json(route, {
         location: {
@@ -76,17 +134,7 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
           },
         ],
       })
-    if (path === "/api/provider")
-      return json(route, {
-        location: location(config),
-        data: currentProviders(providerConfig(config)),
-      })
-    if (path === "/api/model") return json(route, { location: location(config), data: currentModels(providerConfig(config)) })
-    if (path === "/api/model/default")
-      return json(route, { location: location(config), data: currentDefaultModel(providerConfig(config)) })
-    if (path === "/api/integration") return json(route, { location: location(config), data: [] })
     if (path === "/api/command") return json(route, { location: location(config), data: [] })
-    if (path === "/api/plugin") return json(route, { location: location(config), data: [] })
     if (path === "/api/mcp") return json(route, { location: location(config), data: [] })
     if (path === "/api/mcp/resource")
       return json(route, { location: location(config), data: { resources: [], templates: [] } })
@@ -94,31 +142,25 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
     if (integration && route.request().method() === "GET")
       return json(route, {
         location: location(config),
-        data: {
-          id: integration,
-          name: integration,
-          methods: config.integrationMethods?.[integration] ?? [{ type: "key", label: "API key" }],
-          connections: [],
-        },
+        data: { id: integration, name: integration, methods: [{ type: "key", label: "API key" }], connections: [] },
       })
     const integrationConnect = path.match(/^\/api\/integration\/([^/]+)\/connect\/key$/)?.[1]
     if (integrationConnect && route.request().method() === "POST") {
       config.onConnectKey?.({ integrationID: integrationConnect, body: route.request().postDataJSON() })
       return route.fulfill({ status: 204, headers: { "access-control-allow-origin": "*" } })
     }
-    if (/^\/api\/credential\/[^/]+$/.test(path) && route.request().method() === "DELETE")
-      return route.fulfill({ status: 204, headers: { "access-control-allow-origin": "*" } })
     if (path === "/api/project") return json(route, [config.project])
     if (path === "/api/project/current")
       return json(route, { id: (config.project as { id?: string }).id, directory: config.directory })
-    if (path === "/api/location") return json(route, location(config))
-    const projectCopy = path.match(/^\/experimental\/project\/([^/]+)\/copy$/)?.[1]
-    if (projectCopy && route.request().method() === "POST") {
-      const input = route.request().postDataJSON() as { directory: string; name?: string }
-      return json(route, { directory: `${input.directory}/${input.name ?? "copy"}` })
-    }
-    if (projectCopy && route.request().method() === "DELETE")
-      return route.fulfill({ status: 204, headers: { "access-control-allow-origin": "*" } })
+    if (path.startsWith("/api/project/") && route.request().method() === "PATCH") return json(route, config.project)
+    if (path === "/api/path")
+      return json(route, {
+        state: config.directory,
+        config: config.directory,
+        worktree: config.directory,
+        directory: config.directory,
+        home: "C:/OpenCode",
+      })
     if (path === "/api/permission/request")
       return json(route, {
         location: location(config),
@@ -135,43 +177,11 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
       return json(route, { location: location(config), data: { branch: "main", defaultBranch: "main" } })
     if (path === "/api/vcs/status") return json(route, { location: location(config), data: [] })
     if (path === "/api/vcs/diff") return json(route, { location: location(config), data: config.vcsDiff ?? [] })
-    if (path === "/api/fs/list" && config.fileList)
-      return json(route, {
-        location: location(config),
-        data: await config.fileList(url.searchParams.get("path") ?? ""),
-      })
-    const fileRead = path.match(/^\/api\/fs\/read\/(.+)$/)?.[1]
-    if (fileRead && config.fileContent) {
-      const value = await config.fileContent(decodeURIComponent(fileRead))
-      const content = value && typeof value === "object" && "content" in value ? String(value.content) : String(value ?? "")
-      return route.fulfill({ status: 200, body: content, headers: { "content-type": "application/octet-stream" } })
-    }
-    if (path === "/api/fs/find" && config.findFiles) {
-      const entries = await config.findFiles({
-        query: url.searchParams.get("query") ?? "",
-        dirs: url.searchParams.get("type") ?? undefined,
-        limit: url.searchParams.has("limit") ? Number(url.searchParams.get("limit")) : undefined,
-      })
-      return json(route, {
-        location: location(config),
-        data: Array.isArray(entries)
-          ? entries.map((entry) =>
-              typeof entry === "string"
-                ? {
-                    name: entry.split(/[\\/]/).at(-1) ?? entry,
-                    path: entry,
-                    absolute: `${config.directory}/${entry}`,
-                    type: "directory",
-                    ignored: false,
-                  }
-                : entry,
-            )
-          : entries,
-      })
-    }
     if (path === "/api/pty/shells") return json(route, { location: location(config), data: [] })
     if (/^\/api\/pty\/[^/]+\/connect-token$/.test(path))
       return json(route, { location: location(config), data: { ticket: "e2e-ticket", expires_in: 60 } })
+    if (emptyObject.has(path)) return json(route, {})
+    if (emptyList.has(path)) return json(route, [])
     if (path === "/api/session") {
       const directory = url.searchParams.get("directory")
       const parentID = url.searchParams.get("parentID")
@@ -198,9 +208,7 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
       })
     }
     if (path === "/api/session/active") {
-      const statuses = (
-        typeof config.sessionStatus === "function" ? config.sessionStatus() : (config.sessionStatus ?? {})
-      ) as Record<string, { type?: string }>
+      const statuses = (config.sessionStatus ?? {}) as Record<string, { type?: string }>
       return json(route, {
         data: Object.fromEntries(
           Object.entries(statuses).flatMap(([id, status]) =>
@@ -218,6 +226,12 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
     if (/^\/api\/session\/[^/]+\/permission\/[^/]+\/reply$/.test(path) && route.request().method() === "POST") {
       return route.fulfill({ status: 204, headers: { "access-control-allow-origin": "*" } })
     }
+    if (/^\/question\/[^/]+\/(reply|reject)$/.test(path) && route.request().method() === "POST") {
+      return json(route, true)
+    }
+    if (/^\/session\/[^/]+\/permissions\/[^/]+$/.test(path) && route.request().method() === "POST") {
+      return json(route, true)
+    }
     if (
       /^\/api\/session\/[^/]+\/(archive|rename|interrupt|revert\/clear|revert\/commit)$/.test(path) &&
       route.request().method() === "POST"
@@ -227,6 +241,7 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
     if (/^\/api\/session\/[^/]+$/.test(path) && route.request().method() === "DELETE") {
       return route.fulfill({ status: 204, headers: { "access-control-allow-origin": "*" } })
     }
+    if (path in staticRoutes) return json(route, staticRoutes[path])
 
     const currentSessionMatch = path.match(/^\/api\/session\/([^/]+)$/)
     if (currentSessionMatch) {
@@ -237,15 +252,28 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
       })
     }
 
-    const currentMessageMatch = path.match(/^\/api\/session\/([^/]+)\/message\/([^/]+)$/)
-    if (currentMessageMatch) {
-      config.onMessage?.({ sessionID: currentMessageMatch[1]!, messageID: currentMessageMatch[2]! })
-      if (config.messageDelay !== undefined) await new Promise((resolve) => setTimeout(resolve, config.messageDelay))
-      const message = config.message?.(currentMessageMatch[1]!, currentMessageMatch[2]!)
-      if (message === undefined) return json(route, { error: "Message not found" }, undefined, 404)
-      return json(route, { data: currentMessage(message) })
+    const sessionMatch = path.match(/^\/session\/([^/]+)$/)
+    if (sessionMatch) {
+      const session = config.sessions.find((s) => s.id === sessionMatch[1])
+      return json(route, session ?? {})
     }
 
+    const projectMatch = path.match(/^\/project\/([^/]+)$/)
+    if (projectMatch) return json(route, config.project)
+
+    const messageMatch = path.match(/^\/session\/([^/]+)\/message\/([^/]+)$/)
+    if (messageMatch) {
+      config.onMessage?.({ sessionID: messageMatch[1]!, messageID: messageMatch[2]! })
+      if (config.messageDelay !== undefined) await new Promise((resolve) => setTimeout(resolve, config.messageDelay))
+      const message = config.message?.(messageMatch[1]!, messageMatch[2]!)
+      if (message === undefined) return json(route, { error: "Message not found" }, undefined, 404)
+      return json(route, message)
+    }
+
+    const todoMatch = path.match(/^\/session\/([^/]+)\/todo$/)
+    if (todoMatch) return json(route, config.todos?.(todoMatch[1]!) ?? [])
+    if (/^\/session\/[^/]+\/(children|diff)$/.test(path)) return json(route, [])
+
     const currentMessagesMatch = path.match(/^\/api\/session\/([^/]+)\/message$/)
     if (currentMessagesMatch) {
       const token = url.searchParams.get("cursor") ?? undefined
@@ -264,6 +292,23 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
       })
     }
 
+    const messagesMatch = path.match(/^\/session\/([^/]+)\/message$/)
+    if (messagesMatch) {
+      const token = url.searchParams.get("before") ?? undefined
+      const before = token ? cursors.get(token) : undefined
+      if (token && !before) return json(route, { error: "Invalid cursor" }, undefined, 400)
+      config.onMessages?.({ sessionID: messagesMatch[1], before, phase: "start" })
+      await config.beforeMessagesResponse?.({ sessionID: messagesMatch[1]!, before })
+      if (config.messageDelay !== undefined) await new Promise((resolve) => setTimeout(resolve, config.messageDelay))
+      const limit = Number(url.searchParams.get("limit") ?? 80)
+      const pageData = config.pageMessages(messagesMatch[1], limit, before)
+      config.onMessages?.({ sessionID: messagesMatch[1], before, phase: "end" })
+      if (!pageData.cursor) return json(route, pageData.items)
+      const cursor = `cursor_${++nextCursor}`
+      cursors.set(cursor, pageData.cursor)
+      return json(route, pageData.items, { "x-next-cursor": cursor })
+    }
+
     if (url.port === targetPort && targetPort !== appPort) return json(route, {})
     return route.fallback()
   })
@@ -272,75 +317,10 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
 function location(config: MockServerConfig) {
   return {
     directory: config.directory,
-    project: { id: (config.project as { id?: string }).id, directory: config.directory, canonical: config.directory },
+    project: { id: (config.project as { id?: string }).id, directory: config.directory },
   }
 }
 
-function providerConfig(config: MockServerConfig) {
-  return typeof config.provider === "function" ? config.provider() : config.provider
-}
-
-function currentProviders(value: unknown) {
-  if (!record(value) || !Array.isArray(value.all)) return Array.isArray(value) ? value : []
-  return value.all.filter(record).flatMap((provider) =>
-    typeof provider.id === "string" && typeof provider.name === "string"
-      ? [{ id: provider.id, name: provider.name, package: provider.id }]
-      : [],
-  )
-}
-
-function currentModels(value: unknown) {
-  if (!record(value) || !Array.isArray(value.all)) return []
-  return value.all.filter(record).flatMap((provider) => {
-    if (typeof provider.id !== "string" || !record(provider.models)) return []
-    return Object.values(provider.models)
-      .filter(record)
-      .flatMap((model) => {
-        if (typeof model.id !== "string" || typeof model.name !== "string") return []
-        const limit = record(model.limit) ? model.limit : {}
-        const cost = record(model.cost) ? model.cost : {}
-        return [
-          {
-            id: model.id,
-            modelID: model.id,
-            providerID: provider.id,
-            name: model.name,
-            capabilities: { tools: true, input: ["text"], output: ["text"] },
-            variants: record(model.variants)
-              ? Object.entries(model.variants).map(([id, settings]) => ({
-                  id,
-                  ...(jsonRecord(settings) ? { settings: jsonRecord(settings) } : {}),
-                }))
-              : [],
-            time: { released: Date.now() },
-            cost: [
-              {
-                input: typeof cost.input === "number" ? cost.input : 0,
-                output: typeof cost.output === "number" ? cost.output : 0,
-                cache: { read: 0, write: 0 },
-              },
-            ],
-            status: "active",
-            enabled: true,
-            limit: {
-              context: typeof limit.context === "number" ? limit.context : 200_000,
-              output: typeof limit.output === "number" ? limit.output : 32_000,
-            },
-          },
-        ]
-      })
-  })
-}
-
-function currentDefaultModel(value: unknown) {
-  if (!record(value) || !record(value.default)) return null
-  const selected = value.default
-  const models = currentModels(value)
-  return models.find(
-    (model) => model.providerID === selected.providerID && model.id === selected.modelID,
-  ) ?? null
-}
-
 function currentPermission(value: unknown) {
   const permission = value as Record<string, unknown>
   if (permission.action) return permission
@@ -384,222 +364,63 @@ export function currentSession(session: { id: string } & Record<string, unknown>
   }
 }
 
-export function currentMessage(value: unknown): SessionMessageInfo {
-  if (isCurrentMessage(value)) return value
-  if (!record(value) || !record(value.info) || !Array.isArray(value.parts)) throw new Error("Invalid message fixture")
-
-  const info = value.info
-  const parts = value.parts.filter(record)
-  if (typeof info.id !== "string" || !record(info.time) || typeof info.time.created !== "number")
-    throw new Error("Invalid legacy message fixture")
-
-  const time = {
-    created: info.time.created,
-    ...(typeof info.time.completed === "number" ? { completed: info.time.completed } : {}),
+function currentMessage(value: unknown) {
+  const item = value as {
+    info: Record<string, unknown> & { id: string; role: "user" | "assistant"; time: { created: number } }
+    parts: Array<Record<string, unknown> & { type: string }>
   }
-  if (info.role === "user") {
+  if (item.info.role === "user") {
     return {
-      id: info.id,
+      id: item.info.id,
       type: "user",
-      time: { created: time.created },
-      text: parts
+      time: item.info.time,
+      text: item.parts
         .flatMap((part) => (part.type === "text" && typeof part.text === "string" ? [part.text] : []))
         .join("\n"),
-      files: parts.flatMap((part) => (part.type === "file" ? legacyFile(part) : [])),
-      agents: parts.flatMap((part) => (part.type === "agent" ? legacyAgent(part) : [])),
     }
   }
-  if (info.role !== "assistant") throw new Error("Invalid legacy message role")
-
   return {
-    id: info.id,
+    id: item.info.id,
     type: "assistant",
-    time,
-    agent: typeof info.agent === "string" ? info.agent : typeof info.mode === "string" ? info.mode : "build",
-    model: {
-      id: typeof info.modelID === "string" ? info.modelID : "model",
-      providerID: typeof info.providerID === "string" ? info.providerID : "provider",
-      ...(typeof info.variant === "string" ? { variant: info.variant } : {}),
-    },
-    content: parts.flatMap((part) => legacyAssistantContent(part, time.created)),
-    ...(typeof info.cost === "number" ? { cost: info.cost } : {}),
-    ...(tokens(info.tokens) ? { tokens: tokens(info.tokens) } : {}),
-    ...(structuredError(info.error) ? { error: structuredError(info.error) } : {}),
-    ...(finish(info.finish) ? { finish: finish(info.finish) } : {}),
-  }
-}
-
-function isCurrentMessage(value: unknown): value is SessionMessageInfo {
-  return record(value) && typeof value.id === "string" && typeof value.type === "string" && !record(value.info)
-}
-
-function legacyFile(part: Record<string, unknown>): PromptFileAttachment[] {
-  if (typeof part.mime !== "string" || typeof part.url !== "string") return []
-  const data = part.url.match(/^data:[^,]*;base64,(.*)$/)?.[1] ?? ""
-  const source = record(part.source) ? part.source : undefined
-  const sourceText = source && record(source.text) ? source.text : undefined
-  const mention = mentionFrom(sourceText)
-  const uri = source?.type === "resource" && typeof source.uri === "string" ? source.uri : part.url
-  return [
-    {
-      data,
-      mime: part.mime,
-      source: part.url.startsWith("data:") ? { type: "inline" } : { type: "uri", uri },
-      ...(typeof part.filename === "string" ? { name: part.filename } : {}),
-      ...(mention ? { mention } : {}),
-    },
-  ]
-}
-
-function legacyAgent(part: Record<string, unknown>): PromptAgentAttachment[] {
-  if (typeof part.name !== "string") return []
-  const mention = mentionFrom(record(part.source) ? part.source : undefined)
-  return [{ name: part.name, ...(mention ? { mention } : {}) }]
-}
-
-function mentionFrom(value: Record<string, unknown> | undefined) {
-  if (
-    !value ||
-    typeof value.value !== "string" ||
-    typeof value.start !== "number" ||
-    typeof value.end !== "number"
-  )
-    return
-  return { text: value.value, start: value.start, end: value.end }
-}
-
-function legacyAssistantContent(
-  part: Record<string, unknown>,
-  created: number,
-): SessionMessageAssistant["content"] {
-  if (part.type === "text" && typeof part.text === "string")
-    return [{ type: "text", text: part.text, ...(jsonRecord(part.metadata) ? { state: jsonRecord(part.metadata) } : {}) }]
-  if (part.type === "reasoning" && typeof part.text === "string") {
-    const time = record(part.time) ? part.time : undefined
-    return [
-      {
-        type: "reasoning",
-        text: part.text,
-        ...(jsonRecord(part.metadata) ? { state: jsonRecord(part.metadata) } : {}),
-        ...(time && typeof time.start === "number"
-          ? {
-              time: {
-                created: time.start,
-                ...(typeof time.end === "number" ? { completed: time.end } : {}),
-              },
-            }
-          : {}),
-      },
-    ]
-  }
-  if (part.type !== "tool" || typeof part.id !== "string" || typeof part.tool !== "string" || !record(part.state))
-    return []
-
-  const state = part.state
-  const time = record(state.time) ? state.time : undefined
-  const toolTime = {
-    created: time && typeof time.start === "number" ? time.start : created,
-    ...(time && typeof time.start === "number" ? { ran: time.start } : {}),
-    ...(time && typeof time.end === "number" ? { completed: time.end } : {}),
-  }
-  const input = jsonRecord(state.input) ?? {}
-  const metadata = jsonRecord(state.metadata)
-  const base = {
-    type: "tool" as const,
-    id: typeof part.callID === "string" ? part.callID : part.id,
-    name: part.tool,
-    time: toolTime,
-    ...(typeof part.executed === "boolean" ? { executed: part.executed } : {}),
-    ...(jsonRecord(part.providerState) ? { providerState: jsonRecord(part.providerState) } : {}),
-    ...(jsonRecord(part.providerResultState) ? { providerResultState: jsonRecord(part.providerResultState) } : {}),
-  }
-  if (state.status === "pending")
-    return [{ ...base, state: { status: "streaming", input: typeof state.raw === "string" ? state.raw : JSON.stringify(input) } }]
-  if (state.status === "completed")
-    return [
-      {
-        ...base,
-        state: {
-          status: "completed",
-          input,
-          content: [{ type: "text", text: typeof state.output === "string" ? state.output : "" }],
-          ...(metadata ? { metadata } : {}),
+    time: item.info.time,
+    agent: item.info.agent ?? "build",
+    model: { id: item.info.modelID ?? "model", providerID: item.info.providerID ?? "provider" },
+    cost: item.info.cost,
+    tokens: item.info.tokens,
+    error: item.info.error,
+    content: item.parts.flatMap<unknown>((part) => {
+      if (part.type === "text" || part.type === "reasoning") return [{ type: part.type, text: part.text ?? "" }]
+      if (part.type !== "tool") return []
+      const state = part.state as Record<string, unknown>
+      return [
+        {
+          type: "tool",
+          id: part.id,
+          name: part.tool,
+          time: state.time ?? { created: item.info.time.created },
+          state:
+            state.status === "pending"
+              ? { status: "streaming", input: state.raw ?? JSON.stringify(state.input ?? {}) }
+              : state.status === "completed"
+                ? {
+                    status: "completed",
+                    input: state.input ?? {},
+                    structured: state.metadata ?? {},
+                    content: [{ type: "text", text: state.output ?? "" }],
+                  }
+                : state.status === "error"
+                  ? {
+                      status: "error",
+                      input: state.input ?? {},
+                      structured: state.metadata ?? {},
+                      content: [],
+                      error: { type: "ToolError", message: state.error ?? "Tool failed" },
+                    }
+                  : { status: "running", input: state.input ?? {}, structured: state.metadata ?? {}, content: [] },
         },
-      },
-    ]
-  if (state.status === "error")
-    return [
-      {
-        ...base,
-        state: {
-          status: "error",
-          input,
-          error: structuredError(state.error) ?? { type: "ToolError", message: "Tool failed" },
-          ...(metadata ? { metadata } : {}),
-        },
-      },
-    ]
-  return [{ ...base, state: { status: "running", input, metadata: metadata ?? {} } }]
-}
-
-function structuredError(value: unknown): SessionStructuredError | undefined {
-  if (typeof value === "string") return { type: "Error", message: value }
-  if (!record(value)) return
-  if (typeof value.type === "string" && typeof value.message === "string")
-    return { type: value.type, message: value.message }
-  if (typeof value.name !== "string" || !record(value.data) || typeof value.data.message !== "string") return
-  return { type: value.name, message: value.data.message }
-}
-
-function tokens(value: unknown): SessionMessageAssistant["tokens"] | undefined {
-  if (!record(value) || !record(value.cache)) return
-  if (
-    typeof value.input !== "number" ||
-    typeof value.output !== "number" ||
-    typeof value.reasoning !== "number" ||
-    typeof value.cache.read !== "number" ||
-    typeof value.cache.write !== "number"
-  )
-    return
-  return {
-    input: value.input,
-    output: value.output,
-    reasoning: value.reasoning,
-    cache: { read: value.cache.read, write: value.cache.write },
-  }
-}
-
-function finish(value: unknown): SessionMessageAssistant["finish"] | undefined {
-  if (
-    value === "stop" ||
-    value === "length" ||
-    value === "tool-calls" ||
-    value === "content-filter" ||
-    value === "error" ||
-    value === "unknown"
-  )
-    return value
-}
-
-function jsonRecord(value: unknown): Record<string, JsonValue> | undefined {
-  if (!record(value)) return
-  return Object.fromEntries(
-    Object.entries(value).flatMap(([key, item]) => {
-      const next = jsonValue(item)
-      return next === undefined ? [] : [[key, next]]
+      ]
     }),
-  )
-}
-
-function jsonValue(value: unknown): JsonValue | undefined {
-  if (value === null || typeof value === "string" || typeof value === "boolean") return value
-  if (typeof value === "number") return Number.isFinite(value) ? value : null
-  if (Array.isArray(value)) return value.map((item) => jsonValue(item) ?? null)
-  return jsonRecord(value)
-}
-
-function record(value: unknown): value is Record<string, unknown> {
-  return !!value && typeof value === "object" && !Array.isArray(value)
+  }
 }
 
 function json(route: Route, body: unknown, headers?: Record<string, string>, status = 200) {

packages/app/e2e/utils/sse-transport.ts

@@ -3,7 +3,7 @@ import type { Page } from "@playwright/test"
 export type SseConnectionRecord = {
   id: number
   url: string
-  path: "/api/event"
+  path: "/global/event" | "/event" | "/api/event"
   headers: Record<string, string>
   openedAt: number
   endedAt?: number
@@ -174,7 +174,10 @@ export async function installSseTransport<T>(
       const fetch = (input: RequestInfo | URL, init?: RequestInit) => {
         const request = new Request(input, init)
         const url = new URL(request.url)
-        if (url.origin !== server || url.pathname !== "/api/event")
+        if (
+          url.origin !== server ||
+          (url.pathname !== "/global/event" && url.pathname !== "/event" && url.pathname !== "/api/event")
+        )
           return originalFetch(request)
 
         const id = ++nextConnectionID
@@ -190,9 +193,18 @@ export async function installSseTransport<T>(
             record.controller = controller
             connections.push(record)
             if (retry !== undefined) controller.enqueue(encoder.encode(`retry: ${retry}\n\n`))
-            controller.enqueue(
-              encoder.encode(frame({ id: `evt_mock_connected_${id}`, type: "server.connected", data: {} })),
-            )
+            if (url.pathname === "/api/event")
+              controller.enqueue(
+                encoder.encode(frame({ id: `evt_mock_connected_${id}`, type: "server.connected", data: {} })),
+              )
+            if (url.pathname === "/global/event")
+              controller.enqueue(
+                encoder.encode(
+                  frame({
+                    payload: { id: `evt_mock_connected_${id}`, type: "server.connected", properties: {} },
+                  }),
+                ),
+              )
             request.signal.addEventListener(
               "abort",
               () => {

packages/app/index.html

@@ -20,7 +20,7 @@
     <meta property="twitter:image" content="/social-share.png" />
     <script id="oc-theme-preload-script" src="/oc-theme-preload.js"></script>
   </head>
-  <body data-new-layout class="antialiased overscroll-none font-(family-name:--font-family-text) text-[13px] font-[440] overflow-hidden bg-v2-background-bg-deep">
+  <body class="antialiased overscroll-none text-12-regular overflow-hidden bg-v2-background-bg-deep">
     <noscript>You need to enable JavaScript to run this app.</noscript>
     <div id="root" class="flex flex-col h-dvh bg-v2-background-bg-deep p-px"></div>
     <script src="/src/entry.tsx" type="module"></script>

packages/app/package.json

@@ -56,6 +56,7 @@
     "@opencode-ai/client": "workspace:*",
     "@opencode-ai/core": "workspace:*",
     "@opencode-ai/schema": "workspace:*",
+    "@opencode-ai/sdk": "file:vendor/opencode-ai-sdk-1.18.8-dev.tgz",
     "@opencode-ai/session-ui": "workspace:*",
     "@opencode-ai/ui": "workspace:*",
     "@pierre/trees": "1.0.0-beta.4",

packages/app/src/app.tsx

@@ -14,11 +14,14 @@ import {
   Navigate,
   Route,
   Router,
+  useLocation,
+  useNavigate,
   useParams,
   useSearchParams,
 } from "@solidjs/router"
 import { QueryClient, QueryClientProvider } from "@tanstack/solid-query"
 import { Effect } from "effect"
+import { base64Encode } from "@opencode-ai/core/util/encode"
 import {
   type Component,
   createEffect,
@@ -40,7 +43,7 @@ import { CommandProvider, useCommand, type CommandOption } from "@/context/comma
 import { CommentsProvider } from "@/context/comments"
 import { FileProvider } from "@/context/file"
 import { ServerSDKProvider } from "@/context/server-sdk"
-import { ServerSyncProvider } from "@/context/server-sync"
+import { ServerSyncProvider, useServerSync } from "@/context/server-sync"
 import { GlobalProvider, useGlobal } from "@/context/global"
 import { HighlightsProvider } from "@/context/highlights"
 import { LanguageProvider, type Locale, useLanguage } from "@/context/language"
@@ -51,36 +54,58 @@ import { PermissionProvider } from "@/context/permission"
 import { usePlatform } from "@/context/platform"
 import { PromptProvider } from "@/context/prompt"
 import { ServerConnection, ServerProvider, serverName, useServer } from "@/context/server"
-import { SettingsProvider } from "@/context/settings"
+import { SettingsProvider, useSettings } from "@/context/settings"
 import { TabsProvider, useTabs, type DraftTab } from "@/context/tabs"
-import { SDKProvider } from "@/context/sdk"
+import { SDKProvider, useSDK } from "@/context/sdk"
 import { WslServersProvider } from "@/wsl/context"
-import { DirectoryDataProvider } from "@/pages/directory-layout"
-import Layout from "@/pages/layout"
+import DirectoryLayout, { DirectoryDataProvider } from "@/pages/directory-layout"
+import LegacyLayout from "@/pages/layout"
+import NewLayout from "@/pages/layout-new"
 import { ErrorPage } from "./pages/error"
 import { useCheckServerHealth } from "./utils/server-health"
-import { legacySessionServer, requireServerKey, sessionHref } from "./utils/session-route"
-import { decode64 } from "@/utils/base64"
+import { legacySessionHref, legacySessionServer, requireServerKey, sessionHref } from "./utils/session-route"
+import { createSessionLineage } from "@/pages/session/session-lineage"
 
-import { TargetSessionRouteContent } from "@/pages/session"
-import { Home } from "@/pages/home"
+import { SessionPage, SessionRouteErrorBoundary, TargetSessionRouteContent } from "@/pages/session"
+import { NewHome } from "@/pages/home"
+import { LegacyHome } from "@/pages/home/legacy-home"
 
 const NewSession = lazy(() => import("@/pages/new-session"))
 
-const DirectoryDraftRedirect = () => {
+const SessionRoute = () => {
+  const settings = useSettings()
   const params = useParams()
   const [search] = useSearchParams<{ draftId?: string; prompt?: string }>()
+  const sdk = useSDK()
   const server = useServer()
   const tabs = useTabs()
 
+  if (params.id && settings.general.newLayoutDesigns()) {
+    const sessionID = params.id
+    return (
+      <Show when={tabs.ready()}>
+        {(_) => {
+          const persisted = tabs.store.filter((item) => item.type === "session")
+          return <Navigate href={sessionHref(legacySessionServer(persisted, sessionID, server.key), sessionID)} />
+        }}
+      </Show>
+    )
+  }
+
+  // When the new layout is enabled, the legacy new-session route (/:dir/session with no id)
+  // is replaced by a draft at /new-session?draftId=…
   createEffect(() => {
-    if (search.draftId || !tabs.ready()) return
-    const directory = decode64(params.dir)
-    if (!directory) return
-    tabs.newDraft({ server: server.key, directory }, search.prompt)
+    if (!settings.general.newLayoutDesigns()) return
+    if (params.id || search.draftId) return
+    if (!tabs.ready() || !sdk().directory) return
+    tabs.newDraft({ server: server.key, directory: sdk().directory }, search.prompt)
   })
 
-  return null
+  return (
+    <SessionRouteErrorBoundary sessionID={params.id}>
+      <SessionPage />
+    </SessionRouteErrorBoundary>
+  )
 }
 
 function TargetServerRoute(props: ParentProps) {
@@ -92,7 +117,9 @@ function TargetServerRoute(props: ParentProps) {
   })
 
   return (
-    // Owns the server-identity remount. Session changes must not remount this subtree.
+    // Owns the server-identity remount. Session changes must NOT remount this
+    // subtree (SessionRouteErrorBoundary resets and createSessionLineage
+    // re-resolves reactively instead); both rely on this key for server changes.
     <Show when={requireServerKey(params.serverKey)} keyed>
       <ServerSDKProvider server={conn}>
         <ServerSyncProvider server={conn}>{props.children}</ServerSyncProvider>
@@ -107,6 +134,35 @@ const TargetSessionRoute = () => (
   </TargetServerRoute>
 )
 
+function LegacyTargetSessionRoute() {
+  const params = useParams<{ serverKey: string; id: string }>()
+  return (
+    <TargetServerRoute>
+      <SessionRouteErrorBoundary sessionID={params.id} serverKey={requireServerKey(params.serverKey)}>
+        <LegacyTargetSessionRedirect />
+      </SessionRouteErrorBoundary>
+    </TargetServerRoute>
+  )
+}
+
+function LegacyTargetSessionRedirect() {
+  const params = useParams<{ id: string }>()
+  const navigate = useNavigate()
+  const sync = useServerSync()
+  const current = createSessionLineage(
+    () => params.id,
+    () => sync().session.lineage,
+  )
+
+  createEffect(() => {
+    const directory = current()?.session.directory
+    if (!directory) return
+    navigate(legacySessionHref(directory, params.id), { replace: true })
+  })
+
+  return null
+}
+
 // Wraps the non-draft routes. They are gated on (and keyed to) the globally selected
 // server via ServerKey, then provide the server-scoped shell for that server.
 function SelectedServerProviders(props: ParentProps) {
@@ -119,8 +175,17 @@ function SelectedServerProviders(props: ParentProps) {
   )
 }
 
+function LegacyServerLayout(props: ParentProps<{ serverScoped?: JSX.Element }>) {
+  return (
+    <SelectedServerProviders>
+      <LegacyServerScopedShell serverScoped={props.serverScoped}>{props.children}</LegacyServerScopedShell>
+    </SelectedServerProviders>
+  )
+}
+
 function DraftRoute() {
   const [search] = useSearchParams<{ draftId?: string }>()
+  const settings = useSettings()
   const tabs = useTabs()
   return (
     <Show when={tabs.ready()}>
@@ -129,7 +194,14 @@ function DraftRoute() {
         keyed
         fallback={<Navigate href="/" />}
       >
-        {(draft) => <ResolvedDraftRoute draft={draft} />}
+        {(draft) => (
+          <Show
+            when={settings.general.newLayoutDesigns()}
+            fallback={<Navigate href={`/${base64Encode(draft.directory)}/session`} />}
+          >
+            <ResolvedDraftRoute draft={draft} />
+          </Show>
+        )}
       </Show>
     </Show>
   )
@@ -165,6 +237,30 @@ function UiI18nBridge(props: ParentProps) {
   return <I18nProvider value={{ locale: language.intl, t: language.t }}>{props.children}</I18nProvider>
 }
 
+function LayoutCompatibility(props: ParentProps) {
+  const global = useGlobal()
+  const navigate = useNavigate()
+  const server = useServer()
+  const settings = useSettings()
+
+  createEffect(() => {
+    if (settings.general.newLayoutDesigns()) return
+    const current = server.current
+    if (!current) return
+    const protocol = global.ensureServerCtx(current).sdk.protocolKind()
+    if (protocol !== "v2") return
+    const next = global.servers.list().find((s) => {
+      if (ServerConnection.key(s) === ServerConnection.key(current)) return false
+      return global.ensureServerCtx(s).sdk.protocolKind() !== "v2"
+    })
+    if (!next) return
+    navigate("/")
+    queueMicrotask(() => server.setActive(ServerConnection.key(next)))
+  })
+
+  return <>{props.children}</>
+}
+
 declare global {
   interface Window {
     __OPENCODE__?: {
@@ -191,11 +287,17 @@ function QueryProvider(props: ParentProps) {
 }
 
 function BodyDesignClass() {
+  const settings = useSettings()
+
   createRenderEffect(() => {
     if (typeof document === "undefined") return
-    document.body.toggleAttribute("data-new-layout", true)
-    document.body.classList.remove("text-12-regular")
-    document.body.classList.add("font-(family-name:--font-family-text)", "text-[13px]", "font-[440]")
+
+    const enabled = settings.general.newLayoutDesigns()
+    document.body.toggleAttribute("data-new-layout", enabled)
+    document.body.classList.toggle("text-12-regular", !enabled)
+    document.body.classList.toggle("font-(family-name:--font-family-text)", enabled)
+    document.body.classList.toggle("text-[13px]", enabled)
+    document.body.classList.toggle("font-[440]", enabled)
   })
 
   return null
@@ -238,6 +340,7 @@ function DesktopCommands() {
   return null
 }
 
+// Server-scoped providers shared by the legacy shell and the top-level new shell.
 type ServerScopedShellProps = ParentProps<{
   directory?: () => string | undefined
   serverScoped?: JSX.Element
@@ -252,11 +355,19 @@ function ServerScopedProviders(props: ServerScopedShellProps) {
   )
 }
 
-function AppLayout(props: ParentProps<{ serverScoped?: JSX.Element }>) {
+function LegacyServerScopedShell(props: ServerScopedShellProps) {
+  return (
+    <ServerScopedProviders directory={props.directory} serverScoped={props.serverScoped}>
+      <LegacyLayout>{props.children}</LegacyLayout>
+    </ServerScopedProviders>
+  )
+}
+
+function NewAppLayout(props: ParentProps<{ serverScoped?: JSX.Element }>) {
   return (
     <SelectedServerProviders>
       <ServerScopedProviders serverScoped={props.serverScoped}>
-        <Layout>{props.children}</Layout>
+        <NewLayout>{props.children}</NewLayout>
       </ServerScopedProviders>
     </SelectedServerProviders>
   )
@@ -445,7 +556,7 @@ export function AppInterface(props: {
   startup?: Promise<void>
   serverScoped?: JSX.Element
 }) {
-  // The visual layout lives in the router root so it remains mounted across
+  // The visual new layout lives in the router root so it remains mounted across
   // route changes. Draft and session routes override only their server-bound data
   // providers beneath it.
   const ServerShell = (shellProps: ParentProps) => (
@@ -466,22 +577,26 @@ export function AppInterface(props: {
       <GlobalProvider>
         <SettingsProvider>
           <ConnectionGate disableHealthCheck={props.disableHealthCheck} startup={props.startup}>
-            <Dynamic
-              component={props.router ?? Router}
-              root={(routerProps) => (
-                <TabsProvider>
-                  <PermissionProvider>
-                    <NotificationProvider>
-                      <ServerShell>
-                        <AppLayout serverScoped={props.serverScoped}>{routerProps.children}</AppLayout>
-                      </ServerShell>
-                    </NotificationProvider>
-                  </PermissionProvider>
-                </TabsProvider>
-              )}
-            >
-              <Routes />
-            </Dynamic>
+            <Show when={useSettings().general.newLayoutDesigns().toString()} keyed>
+              <Dynamic
+                component={props.router ?? Router}
+                root={(routerProps) => (
+                  <TabsProvider>
+                    <PermissionProvider>
+                      <NotificationProvider>
+                        <ServerShell>
+                          <Show when={useSettings().general.newLayoutDesigns()} fallback={routerProps.children}>
+                            <NewAppLayout serverScoped={props.serverScoped}>{routerProps.children}</NewAppLayout>
+                          </Show>
+                        </ServerShell>
+                      </NotificationProvider>
+                    </PermissionProvider>
+                  </TabsProvider>
+                )}
+              >
+                <Routes serverScoped={props.serverScoped} />
+              </Dynamic>
+            </Show>
           </ConnectionGate>
         </SettingsProvider>
       </GlobalProvider>
@@ -489,20 +604,40 @@ export function AppInterface(props: {
   )
 }
 
-function Routes() {
+function Routes(props: { serverScoped?: JSX.Element }) {
+  const settings = useSettings()
+
   return (
     <>
-      <Route path="/" component={Home} />
-      <Route path="/:dir" component={DirectoryDraftRedirect} />
-      <Route path="/:dir/session" component={DirectoryDraftRedirect} />
-      <Route path="/:dir/session/:id" component={LegacySessionRedirect} />
-      <Route path="/server/:serverKey/session/:id" component={TargetSessionRoute} />
+      <Route
+        component={(routeProps) => (
+          <LegacyServerLayout serverScoped={props.serverScoped}>{routeProps.children}</LegacyServerLayout>
+        )}
+      >
+        <Show when={!settings.general.newLayoutDesigns()}>
+          {
+            <>
+              <Route path="/" component={LegacyHome} />
+              <Route path="/server/:serverKey/session/:id" component={LegacyTargetSessionRoute} />
+            </>
+          }
+        </Show>
+        <Route path="/:dir" component={DirectoryLayout}>
+          <Route path="/" component={() => <Navigate href="session" />} />
+          <Route path="/session/:id?" component={SessionRoute} />
+        </Route>
+      </Route>
+      <Show when={settings.general.newLayoutDesigns()}>
+        <Route path="/" component={NewHome} />
+        <Route path="/:dir/session/:id" component={NewLayoutLegacySessionRedirect} />
+        <Route path="/server/:serverKey/session/:id" component={TargetSessionRoute} />
+      </Show>
       <Route path="/new-session" component={DraftRoute} />
     </>
   )
 }
 
-function LegacySessionRedirect() {
+function NewLayoutLegacySessionRedirect() {
   const server = useServer()
   const tabs = useTabs()
   const params = useParams<{ id: string }>()

packages/app/src/components/command-palette.ts

@@ -1,5 +1,5 @@
 import { getFilename } from "@opencode-ai/core/util/path"
-import type { Project } from "@/types"
+import type { Project } from "@opencode-ai/sdk/v2/client"
 import type { SessionInfo } from "@opencode-ai/client/promise"
 import { useDialog } from "@opencode-ai/ui/context/dialog"
 import { createMemo, onCleanup } from "solid-js"

packages/app/src/components/dialog-custom-provider.tsx

@@ -130,9 +130,26 @@ export function CustomProviderForm(props: { autofocus?: boolean } = {}) {
   }
 
   const saveMutation = useMutation(() => ({
-    mutationFn: async (result: NonNullable<ReturnType<typeof validate>>): Promise<typeof result> => {
-      // TODO: Restore custom providers when V2 exposes config and arbitrary credential APIs.
-      throw new Error(`Custom provider ${result.providerID} is unavailable`)
+    mutationFn: async (result: NonNullable<ReturnType<typeof validate>>) => {
+      if ((await serverSDK().protocol) !== "v1") throw new Error("Custom providers are unavailable on this server")
+      const disabledProviders = serverSync().data.config.disabled_providers ?? []
+      const nextDisabled = disabledProviders.filter((id) => id !== result.providerID)
+
+      if (result.key) {
+        await serverSDK().client.auth.set({
+          providerID: result.providerID,
+          auth: {
+            type: "api",
+            key: result.key,
+          },
+        })
+      }
+
+      await serverSync().updateConfig({
+        provider: { [result.providerID]: result.config },
+        disabled_providers: nextDisabled,
+      })
+      return result
     },
     onSuccess: (result) => {
       dialog.close()