fix(desktop): install matching V2 CLI in WSL

Co-authored-by: Dax Raad <d@ironbay.co>

packages/ai/src/protocols/bedrock-converse.ts

@@ -348,7 +348,10 @@ const lowerMessages = Effect.fn("BedrockConverse.lowerMessages")(function* (
           continue
         }
       }
-      messages.push({ role: "user", content })
+      const previous = messages.at(-1)
+      if (previous?.role === "user")
+        messages[messages.length - 1] = { role: "user", content: [...previous.content, ...content] }
+      else messages.push({ role: "user", content })
       continue
     }
 
@@ -392,7 +395,10 @@ const lowerMessages = Effect.fn("BedrockConverse.lowerMessages")(function* (
       const cachePoint = BedrockCache.block(breakpoints, part.cache)
       if (cachePoint) content.push(cachePoint)
     }
-    messages.push({ role: "user", content })
+    const previous = messages.at(-1)
+    if (previous?.role === "user")
+      messages[messages.length - 1] = { role: "user", content: [...previous.content, ...content] }
+    else messages.push({ role: "user", content })
   }
 
   return messages

packages/ai/test/fixtures/recordings/bedrock-converse/continues-after-parallel-tool-results.json

@@ -0,0 +1,36 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:bedrock-converse",
+      "provider:amazon-bedrock",
+      "protocol:bedrock-converse",
+      "tool",
+      "tool-loop",
+      "parallel"
+    ],
+    "name": "bedrock-converse/continues-after-parallel-tool-results",
+    "recordedAt": "2026-08-11T16:41:46.482Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://bedrock-runtime.us-east-1.amazonaws.com/model/us.amazon.nova-micro-v1%3A0/converse-stream",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"modelId\":\"us.amazon.nova-micro-v1:0\",\"messages\":[{\"role\":\"user\",\"content\":[{\"text\":\"Compare the weather in Paris and London.\"}]},{\"role\":\"assistant\",\"content\":[{\"toolUse\":{\"toolUseId\":\"weather_paris\",\"name\":\"get_weather\",\"input\":{\"city\":\"Paris\"}}},{\"toolUse\":{\"toolUseId\":\"weather_london\",\"name\":\"get_weather\",\"input\":{\"city\":\"London\"}}}]},{\"role\":\"user\",\"content\":[{\"toolResult\":{\"toolUseId\":\"weather_paris\",\"content\":[{\"json\":{\"temperature\":22,\"condition\":\"sunny\"}}],\"status\":\"success\"}},{\"toolResult\":{\"toolUseId\":\"weather_london\",\"content\":[{\"json\":{\"temperature\":14,\"condition\":\"rainy\"}}],\"status\":\"success\"}}]}],\"system\":[{\"text\":\"After receiving both tool results, reply exactly: Paris is sunny; London is rainy.\"}],\"inferenceConfig\":{\"maxTokens\":40,\"temperature\":0},\"toolConfig\":{\"tools\":[{\"toolSpec\":{\"name\":\"get_weather\",\"description\":\"Get current weather for a city.\",\"inputSchema\":{\"json\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}}}]}}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "application/vnd.amazon.eventstream"
+        },
+        "body": "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",
+        "bodyEncoding": "base64"
+      }
+    }
+  ]
+}

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

@@ -255,6 +255,57 @@ describe("Bedrock Converse route", () => {
     }),
   )
 
+  it.effect("merges parallel tool results into one user message", () =>
+    Effect.gen(function* () {
+      const prepared = yield* compileRequest(
+        LLM.request({
+          id: "req_parallel_history",
+          model,
+          messages: [
+            Message.user("Compare the weather."),
+            Message.assistant([
+              ToolCallPart.make({ id: "tool_paris", name: "lookup", input: { city: "Paris" } }),
+              ToolCallPart.make({ id: "tool_london", name: "lookup", input: { city: "London" } }),
+            ]),
+            Message.tool({ id: "tool_paris", name: "lookup", result: { forecast: "sunny" } }),
+            Message.tool({ id: "tool_london", name: "lookup", result: { forecast: "rainy" } }),
+          ],
+          cache: "none",
+        }),
+      )
+
+      expect(prepared.body.messages).toEqual([
+        { role: "user", content: [{ text: "Compare the weather." }] },
+        {
+          role: "assistant",
+          content: [
+            { toolUse: { toolUseId: "tool_paris", name: "lookup", input: { city: "Paris" } } },
+            { toolUse: { toolUseId: "tool_london", name: "lookup", input: { city: "London" } } },
+          ],
+        },
+        {
+          role: "user",
+          content: [
+            {
+              toolResult: {
+                toolUseId: "tool_paris",
+                content: [{ json: { forecast: "sunny" } }],
+                status: "success",
+              },
+            },
+            {
+              toolResult: {
+                toolUseId: "tool_london",
+                content: [{ json: { forecast: "rainy" } }],
+                status: "success",
+              },
+            },
+          ],
+        },
+      ])
+    }),
+  )
+
   it.effect("lowers image content in tool-result messages", () =>
     Effect.gen(function* () {
       const prepared = yield* compileRequest(
@@ -1165,4 +1216,39 @@ describe("Bedrock Converse recorded", () => {
       )
     }),
   )
+
+  recorded.effect.with("continues after parallel tool results", { tags: ["tool", "tool-loop", "parallel"] }, () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(
+        LLM.request({
+          id: "recorded_bedrock_parallel_tool_results",
+          model: recordedModel(),
+          system: "After receiving both tool results, reply exactly: Paris is sunny; London is rainy.",
+          messages: [
+            Message.user("Compare the weather in Paris and London."),
+            Message.assistant([
+              ToolCallPart.make({ id: "weather_paris", name: weatherToolName, input: { city: "Paris" } }),
+              ToolCallPart.make({ id: "weather_london", name: weatherToolName, input: { city: "London" } }),
+            ]),
+            Message.tool({
+              id: "weather_paris",
+              name: weatherToolName,
+              result: { temperature: 22, condition: "sunny" },
+            }),
+            Message.tool({
+              id: "weather_london",
+              name: weatherToolName,
+              result: { temperature: 14, condition: "rainy" },
+            }),
+          ],
+          tools: [weatherTool],
+          cache: "none",
+          generation: { maxTokens: 40, temperature: 0 },
+        }),
+      )
+
+      expect(response.text.trim()).toBe("Paris is sunny; London is rainy.")
+      expect(response.finishReason?.normalized).toBe("stop")
+    }),
+  )
 })

packages/app/src/context/server-session-v2-reducer.test.ts

@@ -69,6 +69,63 @@ describe("v2 session reducer", () => {
     })
   })
 
+  test("prefers durable selection predecessors and derives them for older events", () => {
+    const source: SessionMessageInfo[] = [
+      { id: "msg_previous_agent", type: "agent-switched", agent: "build", time: { created: 1 } },
+      {
+        id: "msg_previous_model",
+        type: "model-switched",
+        model: { id: "old", providerID: "provider" },
+        time: { created: 1 },
+      },
+    ]
+    const reducer = createV2SessionReducer()
+
+    const agent = reducer.reduce(
+      source,
+      event({
+        ...base,
+        id: "evt_agent",
+        type: "session.agent.selected",
+        data: { sessionID: "ses_1", agent: "plan", previous: "review" },
+      }),
+    )
+    const model = reducer.reduce(
+      source,
+      event({
+        ...base,
+        id: "evt_model",
+        type: "session.model.selected",
+        data: {
+          sessionID: "ses_1",
+          model: { id: "new", providerID: "provider" },
+          previous: { id: "durable", providerID: "provider" },
+        },
+      }),
+    )
+    const legacyAgent = reducer.reduce(
+      source,
+      event({
+        ...base,
+        id: "evt_legacy_agent",
+        type: "session.agent.selected",
+        data: { sessionID: "ses_1", agent: "plan" },
+      }),
+    )
+
+    expect(agent?.messages.at(-1)).toMatchObject({ type: "agent-switched", agent: "plan", previous: "review" })
+    expect(model?.messages.at(-1)).toMatchObject({
+      type: "model-switched",
+      model: { id: "new" },
+      previous: { id: "durable" },
+    })
+    expect(legacyAgent?.messages.at(-1)).toMatchObject({
+      type: "agent-switched",
+      agent: "plan",
+      previous: "build",
+    })
+  })
+
   test("folds tool, retry, and completion events", () => {
     const reducer = createV2SessionReducer()
     let messages: SessionMessageInfo[] = []

packages/app/src/context/server-session-v2-reducer.ts

@@ -61,6 +61,12 @@ export function createV2SessionReducer() {
           type: "agent-switched",
           metadata: event.metadata,
           agent: event.data.agent,
+          previous:
+            event.data.previous ??
+            source.findLast(
+              (item): item is Extract<SessionMessageInfo, { type: "agent-switched" | "assistant" }> =>
+                item.type === "agent-switched" || item.type === "assistant",
+            )?.agent,
           time: { created: event.created },
         })
       case "session.model.selected":
@@ -69,10 +75,12 @@ export function createV2SessionReducer() {
           type: "model-switched",
           metadata: event.metadata,
           model: event.data.model,
-          previous: source.findLast(
-            (item): item is Extract<SessionMessageInfo, { type: "model-switched" | "assistant" }> =>
-              item.type === "model-switched" || item.type === "assistant",
-          )?.model,
+          previous:
+            event.data.previous ??
+            source.findLast(
+              (item): item is Extract<SessionMessageInfo, { type: "model-switched" | "assistant" }> =>
+                item.type === "model-switched" || item.type === "assistant",
+            )?.model,
           time: { created: event.created },
         })
       case "session.synthetic":

packages/cli/src/acp/service.ts

@@ -422,8 +422,7 @@ async function loadCatalog(client: OpenCodeClient, cwd: string): Promise<Catalog
         defaultModel: {
           providerID: defaultModel.providerID,
           id: defaultModel.id,
-          variant:
-            defaultModel.variants.find((variant) => variant.id === "default")?.id ?? defaultModel.variants[0]?.id,
+          variant: defaultModel.variants.find((variant) => variant.id === "default")?.id,
         },
         modes: agents.map((agent) => ({ id: agent.id, name: agent.name, description: agent.description })),
         defaultModeID: defaultAgent.id,

packages/cli/test/acp/service-lifecycle.test.ts

@@ -3,6 +3,38 @@ import type { SessionConfigOption } from "@agentclientprotocol/sdk"
 import { makeACPFixture, makeSession, secondModel } from "./service-fixture"
 
 describe("acp service lifecycle", () => {
+  test("does not persist the first catalog variant when no explicit default exists", async () => {
+    const model = { ...secondModel, variants: [{ id: "none" }, { id: "high" }] }
+    await using fixture = makeACPFixture({
+      models: [model],
+      defaultModel: model,
+      fetch(request) {
+        if (request.method === "POST" && request.path === "/api/session") {
+          return Response.json({
+            data: makeSession("ses_default_variant", {
+              model: { providerID: model.providerID, id: model.id },
+            }),
+          })
+        }
+        return undefined
+      },
+    })
+
+    const created = await fixture.service.newSession({ cwd: "/workspace", mcpServers: [] })
+
+    expect(fixture.requests).toContainEqual({
+      method: "POST",
+      path: "/api/session",
+      query: {},
+      body: {
+        location: { directory: "/workspace" },
+        agent: "build",
+        model: { providerID: "test", id: "second-model" },
+      },
+    })
+    expect(currentValue(created, "effort")).toBe("none")
+  })
+
   test("loads and forks with paginated replay while resume does not replay", async () => {
     await using fixture = makeACPFixture({
       fetch(request) {

packages/client/src/effect/api/api.ts

@@ -339,7 +339,11 @@ export type Endpoint5_31Output =
           readonly type: "session.agent.selected"
           readonly durable: { readonly aggregateID: string; readonly seq: Event.Seq; readonly version: Event.Version }
           readonly location?: Location.Ref | undefined
-          readonly data: { readonly sessionID: Session.ID; readonly agent: Agent.ID }
+          readonly data: {
+            readonly sessionID: Session.ID
+            readonly agent: Agent.ID
+            readonly previous?: Agent.ID | undefined
+          }
         }
       | {
           readonly id: Event.ID
@@ -348,7 +352,11 @@ export type Endpoint5_31Output =
           readonly type: "session.model.selected"
           readonly durable: { readonly aggregateID: string; readonly seq: Event.Seq; readonly version: Event.Version }
           readonly location?: Location.Ref | undefined
-          readonly data: { readonly sessionID: Session.ID; readonly model: Model.Ref }
+          readonly data: {
+            readonly sessionID: Session.ID
+            readonly model: Model.Ref
+            readonly previous?: Model.Ref | undefined
+          }
         }
       | {
           readonly id: Event.ID

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

@@ -436,7 +436,7 @@ export type SessionAgentSelected = {
   type: "session.agent.selected"
   durable: { aggregateID: string; seq: number; version: 1 }
   location?: LocationRef
-  data: { sessionID: string; agent: string }
+  data: { sessionID: string; agent: string; previous?: string }
 }
 
 export type SessionModelSelected = {
@@ -446,7 +446,7 @@ export type SessionModelSelected = {
   type: "session.model.selected"
   durable: { aggregateID: string; seq: number; version: 1 }
   location?: LocationRef
-  data: { sessionID: string; model: ModelRef }
+  data: { sessionID: string; model: ModelRef; previous?: ModelRef }
 }
 
 export type SessionMoved = {

packages/core/src/config/plugin/source.ts

@@ -4,7 +4,7 @@ import { Directory, Document, type Entry } from "@opencode-ai/schema/config"
 import { ConfigPlugin } from "@opencode-ai/schema/config/plugin"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
-import { Context, Effect, Layer, Option, PubSub, Scope, Stream } from "effect"
+import { Context, Effect, Layer, Option, Predicate, PubSub, Schema, Scope, Stream } from "effect"
 import path from "path"
 import { fileURLToPath } from "url"
 import { Config } from "../../config"
@@ -154,19 +154,67 @@ const scan = Effect.fn("ConfigPluginSource.scan")(function* (
 })
 
 const sourceDirectories = ["plugin", "plugins"] as const
+const Package = Schema.Struct({
+  exports: Schema.optional(Schema.Unknown),
+  module: Schema.optional(Schema.Unknown),
+  main: Schema.optional(Schema.Unknown),
+})
+const decodePackage = Schema.decodeUnknownOption(Package)
 
 function discoverDirectory(fs: FSUtil.Interface, directory: string) {
   return Effect.gen(function* () {
-    const files = yield* fs
-      .scan(`{${sourceDirectories.join(",")}}/*.{ts,js}`, {
-        cwd: directory,
-        absolute: true,
-        include: "file",
-        dot: true,
-        symlink: true,
-      })
-      .pipe(Effect.orElseSucceed(() => []))
-    return files.sort().map((target): Operation => ({ type: "add", target, options: {} }))
+    const children = (yield* Effect.forEach(sourceDirectories, (source) =>
+      fs.readDirectoryEntries(path.join(directory, source)).pipe(
+        Effect.orElseSucceed(() => []),
+        Effect.map((entries) =>
+          entries.map((entry) => ({ ...entry, target: path.join(directory, source, entry.name) })),
+        ),
+      ),
+    ))
+      .flat()
+      .sort((a, b) => (a.target < b.target ? -1 : a.target > b.target ? 1 : 0))
+    const targets = yield* Effect.forEach(children, (entry) => discoverChild(fs, entry))
+    return targets.flatMap(Option.toArray).map((target): Operation => ({ type: "add", target, options: {} }))
+  })
+}
+
+function discoverChild(fs: FSUtil.Interface, entry: FSUtil.DirEntry & { target: string }) {
+  return Effect.gen(function* () {
+    const source = entry.target.endsWith(".ts") || entry.target.endsWith(".js")
+    if (entry.type === "file" && source) return Option.some(entry.target)
+    if (entry.type === "directory") return yield* discoverPackage(fs, entry.target)
+    if (entry.type !== "symlink") return Option.none<string>()
+    if (source && (yield* fs.isFile(entry.target))) return Option.some(entry.target)
+    if (yield* fs.isDir(entry.target)) return yield* discoverPackage(fs, entry.target)
+    return Option.none<string>()
+  })
+}
+
+function discoverPackage(fs: FSUtil.Interface, directory: string) {
+  return Effect.gen(function* () {
+    const root = yield* fs.resolve(directory)
+    const manifest = yield* fs
+      .readJson(path.join(directory, "package.json"))
+      .pipe(Effect.map(decodePackage), Effect.orElseSucceed(Option.none))
+    const configured = Option.isSome(manifest)
+      ? [manifest.value.exports, manifest.value.module, manifest.value.main].filter(Predicate.isString)
+      : []
+    return yield* Effect.findFirst(
+      [...configured, "index.ts", "index.js"]
+        .filter((entry) => !path.isAbsolute(entry))
+        .map((entry) => path.resolve(directory, entry))
+        .filter((entry) => FSUtil.contains(directory, entry)),
+      (entry) =>
+        fs
+          .isFile(entry)
+          .pipe(
+            Effect.flatMap((exists) =>
+              exists
+                ? fs.resolve(entry).pipe(Effect.map((resolved) => FSUtil.contains(root, resolved)))
+                : Effect.succeed(false),
+            ),
+          ),
+    )
   })
 }
 

packages/core/src/database/sqlite.bun.ts

@@ -1,58 +1,32 @@
-import { Database } from "bun:sqlite"
+import { Database, type SQLQueryBindings } from "bun:sqlite"
 import { drizzle } from "drizzle-orm/bun-sqlite"
-import { Context, Effect, Fiber, Layer, Scope, Semaphore, Stream } from "effect"
-import { identity } from "effect/Function"
+import { Context, Effect, Layer } from "effect"
 import { Reactivity } from "effect/unstable/reactivity"
-import { SqlClient, Statement } from "effect/unstable/sql"
-import type { Connection } from "effect/unstable/sql/SqlConnection"
+import { SqlClient } from "effect/unstable/sql"
 import { classifySqliteError, SqlError } from "effect/unstable/sql/SqlError"
 import { Sqlite } from "./sqlite"
 
-const ATTR_DB_SYSTEM_NAME = "db.system.name"
-
 const TypeId = "~@opencode-ai/core/database/SqliteBun" as const
-type TypeId = typeof TypeId
 
-interface SqliteClient extends SqlClient.SqlClient {
-  readonly [TypeId]: TypeId
-  readonly config: Config
-  readonly export: Effect.Effect<Uint8Array, SqlError>
-  readonly loadExtension: (path: string) => Effect.Effect<void, SqlError>
-  readonly updateValues: never
-}
-
-interface Config {
+interface Config extends Sqlite.ClientConfig {
   readonly filename: string
   readonly readonly?: boolean
   readonly create?: boolean
   readonly readwrite?: boolean
   readonly disableWAL?: boolean
-  readonly spanAttributes?: Record<string, unknown>
-  readonly transformResultNames?: (str: string) => string
-  readonly transformQueryNames?: (str: string) => string
-}
-
-interface SqliteConnection extends Connection {
-  readonly export: Effect.Effect<Uint8Array, SqlError>
-  readonly loadExtension: (path: string) => Effect.Effect<void, SqlError>
 }
 
 const make = (options: Config) =>
   Effect.gen(function* () {
     const native = (yield* Sqlite.Native) as Database
 
-    const compiler = Statement.makeCompilerSqlite(options.transformQueryNames)
-    const transformRows = options.transformResultNames
-      ? Statement.defaultTransforms(options.transformResultNames).array
-      : undefined
-
     const run = (query: string, params: ReadonlyArray<unknown> = []) =>
       Effect.withFiber<Array<Record<string, unknown>>, SqlError>((fiber) => {
-        const statement = native.query(query)
+        const statement = native.query<Record<string, unknown>, SQLQueryBindings[]>(query)
         // @ts-ignore bun-types missing safeIntegers method, fixed in https://github.com/oven-sh/bun/pull/26627
         statement.safeIntegers(Context.get(fiber.context, SqlClient.SafeIntegers))
         try {
-          return Effect.succeed((statement.all(...(params as any)) ?? []) as Array<Record<string, unknown>>)
+          return Effect.succeed(statement.all(...(params as SQLQueryBindings[])) ?? [])
         } catch (cause) {
           return Effect.fail(
             new SqlError({
@@ -64,11 +38,11 @@ const make = (options: Config) =>
 
     const runValues = (query: string, params: ReadonlyArray<unknown> = []) =>
       Effect.withFiber<Array<unknown[]>, SqlError>((fiber) => {
-        const statement = native.query(query)
+        const statement = native.query<unknown, SQLQueryBindings[]>(query)
         // @ts-ignore bun-types missing safeIntegers method, fixed in https://github.com/oven-sh/bun/pull/26627
         statement.safeIntegers(Context.get(fiber.context, SqlClient.SafeIntegers))
         try {
-          return Effect.succeed((statement.values(...(params as any)) ?? []) as Array<unknown[]>)
+          return Effect.succeed(statement.values(...(params as SQLQueryBindings[])) ?? [])
         } catch (cause) {
           return Effect.fail(
             new SqlError({
@@ -78,25 +52,7 @@ const make = (options: Config) =>
         }
       })
 
-    const connection = identity<SqliteConnection>({
-      execute(query, params, transformRows) {
-        return transformRows ? Effect.map(run(query, params), transformRows) : run(query, params)
-      },
-      executeRaw(query, params) {
-        return run(query, params)
-      },
-      executeValues(query, params) {
-        return runValues(query, params)
-      },
-      executeValuesUnprepared(query, params) {
-        return runValues(query, params)
-      },
-      executeUnprepared(query, params, transformRows) {
-        return this.execute(query, params, transformRows)
-      },
-      executeStream() {
-        return Stream.die("executeStream not implemented")
-      },
+    const connection = Sqlite.makeConnection(run, runValues, {
       export: Effect.try({
         try: () => native.serialize(),
         catch: (cause) =>
@@ -104,7 +60,7 @@ const make = (options: Config) =>
             reason: classifySqliteError(cause, { message: "Failed to export database", operation: "export" }),
           }),
       }),
-      loadExtension: (path) =>
+      loadExtension: (path: string) =>
         Effect.try({
           try: () => native.loadExtension(path),
           catch: (cause) =>
@@ -114,37 +70,10 @@ const make = (options: Config) =>
         }),
     })
 
-    const semaphore = yield* Semaphore.make(1)
-    const acquirer = semaphore.withPermits(1)(Effect.succeed(connection))
-    const transactionAcquirer = Effect.uninterruptibleMask((restore) => {
-      const fiber = Fiber.getCurrent()!
-      const scope = Context.getUnsafe(fiber.context, Scope.Scope)
-      return Effect.as(
-        Effect.tap(restore(semaphore.take(1)), () => Scope.addFinalizer(scope, semaphore.release(1))),
-        connection,
-      )
-    })
-
-    const client = Object.assign(
-      (yield* SqlClient.make({
-        acquirer,
-        compiler,
-        transactionAcquirer,
-        spanAttributes: [
-          ...(options.spanAttributes ? Object.entries(options.spanAttributes) : []),
-          [ATTR_DB_SYSTEM_NAME, "sqlite"],
-        ],
-        transformRows,
-      })) as SqliteClient,
-      {
-        [TypeId]: TypeId,
-        config: options,
-        export: Effect.flatMap(acquirer, (_) => _.export),
-        loadExtension: (path: string) => Effect.flatMap(acquirer, (_) => _.loadExtension(path)),
-      },
-    )
-
-    return client
+    return yield* Sqlite.makeClient(options, connection, TypeId, (acquirer) => ({
+      export: Effect.flatMap(acquirer, (_) => _.export),
+      loadExtension: (path: string) => Effect.flatMap(acquirer, (_) => _.loadExtension(path)),
+    }))
   })
 
 const nativeLayer = (config: Config) =>

packages/core/src/database/sqlite.node.ts

@@ -1,26 +1,14 @@
 import { DatabaseSync, type SQLInputValue } from "node:sqlite"
 import { drizzle } from "drizzle-orm/node-sqlite"
-import { Context, Effect, Fiber, Layer, Scope, Semaphore, Stream } from "effect"
-import { identity } from "effect/Function"
+import { Context, Effect, Layer } from "effect"
 import { Reactivity } from "effect/unstable/reactivity"
-import { SqlClient, Statement } from "effect/unstable/sql"
-import type { Connection } from "effect/unstable/sql/SqlConnection"
+import { SqlClient } from "effect/unstable/sql"
 import { classifySqliteError, SqlError } from "effect/unstable/sql/SqlError"
 import { Sqlite } from "./sqlite"
 
-const ATTR_DB_SYSTEM_NAME = "db.system.name"
-
 const TypeId = "~@opencode-ai/core/database/SqliteNode" as const
-type TypeId = typeof TypeId
 
-interface SqliteClient extends SqlClient.SqlClient {
-  readonly [TypeId]: TypeId
-  readonly config: Config
-  readonly loadExtension: (path: string) => Effect.Effect<void, SqlError>
-  readonly updateValues: never
-}
-
-interface Config {
+interface Config extends Sqlite.ClientConfig {
   readonly filename: string
   readonly readonly?: boolean
   readonly create?: boolean
@@ -28,24 +16,12 @@ interface Config {
   readonly disableWAL?: boolean
   readonly timeout?: number
   readonly allowExtension?: boolean
-  readonly spanAttributes?: Record<string, unknown>
-  readonly transformResultNames?: (str: string) => string
-  readonly transformQueryNames?: (str: string) => string
-}
-
-interface SqliteConnection extends Connection {
-  readonly loadExtension: (path: string) => Effect.Effect<void, SqlError>
 }
 
 const make = (options: Config) =>
   Effect.gen(function* () {
     const native = (yield* Sqlite.Native) as DatabaseSync
 
-    const compiler = Statement.makeCompilerSqlite(options.transformQueryNames)
-    const transformRows = options.transformResultNames
-      ? Statement.defaultTransforms(options.transformResultNames).array
-      : undefined
-
     const run = (query: string, params: ReadonlyArray<unknown> = []) =>
       Effect.withFiber<Array<Record<string, unknown>>, SqlError>((fiber) => {
         const statement = native.prepare(query)
@@ -79,26 +55,8 @@ const make = (options: Config) =>
         }
       })
 
-    const connection = identity<SqliteConnection>({
-      execute(query, params, transformRows) {
-        return transformRows ? Effect.map(run(query, params), transformRows) : run(query, params)
-      },
-      executeRaw(query, params) {
-        return run(query, params)
-      },
-      executeValues(query, params) {
-        return runValues(query, params)
-      },
-      executeValuesUnprepared(query, params) {
-        return runValues(query, params)
-      },
-      executeUnprepared(query, params, transformRows) {
-        return this.execute(query, params, transformRows)
-      },
-      executeStream() {
-        return Stream.die("executeStream not implemented")
-      },
-      loadExtension: (path) =>
+    const connection = Sqlite.makeConnection(run, runValues, {
+      loadExtension: (path: string) =>
         Effect.try({
           try: () => native.loadExtension(path),
           catch: (cause) =>
@@ -108,36 +66,9 @@ const make = (options: Config) =>
         }),
     })
 
-    const semaphore = yield* Semaphore.make(1)
-    const acquirer = semaphore.withPermits(1)(Effect.succeed(connection))
-    const transactionAcquirer = Effect.uninterruptibleMask((restore) => {
-      const fiber = Fiber.getCurrent()!
-      const scope = Context.getUnsafe(fiber.context, Scope.Scope)
-      return Effect.as(
-        Effect.tap(restore(semaphore.take(1)), () => Scope.addFinalizer(scope, semaphore.release(1))),
-        connection,
-      )
-    })
-
-    const client = Object.assign(
-      (yield* SqlClient.make({
-        acquirer,
-        compiler,
-        transactionAcquirer,
-        spanAttributes: [
-          ...(options.spanAttributes ? Object.entries(options.spanAttributes) : []),
-          [ATTR_DB_SYSTEM_NAME, "sqlite"],
-        ],
-        transformRows,
-      })) as SqliteClient,
-      {
-        [TypeId]: TypeId,
-        config: options,
-        loadExtension: (path: string) => Effect.flatMap(acquirer, (_) => _.loadExtension(path)),
-      },
-    )
-
-    return client
+    return yield* Sqlite.makeClient(options, connection, TypeId, (acquirer) => ({
+      loadExtension: (path: string) => Effect.flatMap(acquirer, (_) => _.loadExtension(path)),
+    }))
   })
 
 const nativeLayer = (config: Config) =>

packages/core/src/database/sqlite.ts

@@ -1,8 +1,100 @@
 export * as Sqlite from "./sqlite"
 
-import { Context } from "effect"
+import { Context, Effect, Fiber, Scope, Semaphore, Stream } from "effect"
+import { identity } from "effect/Function"
+import { SqlClient, Statement } from "effect/unstable/sql"
+import type { Connection } from "effect/unstable/sql/SqlConnection"
+import type { SqlError } from "effect/unstable/sql/SqlError"
 import type { drizzle } from "drizzle-orm/bun-sqlite"
 
 export type DrizzleClient = ReturnType<typeof drizzle>
 export class Native extends Context.Service<Native, unknown>()("@opencode-ai/core/database/SqliteNative") {}
 export class Drizzle extends Context.Service<Drizzle, DrizzleClient>()("@opencode-ai/core/database/SqliteDrizzle") {}
+
+export interface ClientConfig {
+  readonly spanAttributes?: Record<string, unknown>
+  readonly transformResultNames?: (str: string) => string
+  readonly transformQueryNames?: (str: string) => string
+}
+
+type Run = (
+  query: string,
+  params?: ReadonlyArray<unknown>,
+) => Effect.Effect<ReadonlyArray<Record<string, unknown>>, SqlError>
+
+type RunValues = (
+  query: string,
+  params?: ReadonlyArray<unknown>,
+) => Effect.Effect<ReadonlyArray<ReadonlyArray<unknown>>, SqlError>
+
+export const makeConnection = <Extensions extends object>(run: Run, runValues: RunValues, extensions: Extensions) =>
+  identity<Connection & Extensions>({
+    execute(query, params, transformRows) {
+      return transformRows ? Effect.map(run(query, params), transformRows) : run(query, params)
+    },
+    executeRaw(query, params) {
+      return run(query, params)
+    },
+    executeValues(query, params) {
+      return runValues(query, params)
+    },
+    executeValuesUnprepared(query, params) {
+      return runValues(query, params)
+    },
+    executeUnprepared(query, params, transformRows) {
+      return this.execute(query, params, transformRows)
+    },
+    executeStream() {
+      return Stream.die("executeStream not implemented")
+    },
+    ...extensions,
+  })
+
+export const makeClient = <
+  Config extends ClientConfig,
+  SqliteConnection extends Connection,
+  const TypeId extends string,
+  Extensions extends object,
+>(
+  options: Config,
+  connection: SqliteConnection,
+  typeId: TypeId,
+  extensions: (acquirer: Effect.Effect<SqliteConnection, SqlError, Scope.Scope>) => Extensions,
+) =>
+  Effect.gen(function* () {
+    const semaphore = yield* Semaphore.make(1)
+    const acquirer = semaphore.withPermits(1)(Effect.succeed(connection))
+    const transactionAcquirer = Effect.uninterruptibleMask((restore) => {
+      const fiber = Fiber.getCurrent()!
+      const scope = Context.getUnsafe(fiber.context, Scope.Scope)
+      return Effect.as(
+        Effect.tap(restore(semaphore.take(1)), () => Scope.addFinalizer(scope, semaphore.release(1))),
+        connection,
+      )
+    })
+    const transformRows = options.transformResultNames
+      ? Statement.defaultTransforms(options.transformResultNames).array
+      : undefined
+
+    return Object.assign(
+      yield* SqlClient.make({
+        acquirer,
+        compiler: Statement.makeCompilerSqlite(options.transformQueryNames),
+        transactionAcquirer,
+        spanAttributes: [
+          ...(options.spanAttributes ? Object.entries(options.spanAttributes) : []),
+          ["db.system.name", "sqlite"],
+        ],
+        transformRows,
+      }),
+      {
+        [typeId]: typeId,
+        config: options,
+        ...extensions(acquirer),
+      },
+    ) as SqlClient.SqlClient &
+      Record<TypeId, TypeId> & {
+        readonly config: Config
+        readonly updateValues: never
+      } & Extensions
+  })

packages/core/src/database/v1-migration.ts

@@ -7,7 +7,7 @@ import { SessionV1 } from "@opencode-ai/schema/session-v1"
 import { SessionMessage } from "../session/message"
 import { SessionSchema } from "../session/schema"
 import { KVTable } from "../kv/sql"
-import { EventSequenceTable, EventTable } from "../event/sql"
+import { EventSequenceTable } from "../event/sql"
 import { eq, sql } from "drizzle-orm"
 import { Global } from "@opencode-ai/util/global"
 import { existsSync } from "node:fs"
@@ -161,6 +161,7 @@ type NextMessage = {
 
 const lock = Semaphore.makeUnsafe(1)
 const MIGRATION_STATE_KEY = "migration.v1-v2"
+const EVENT_DELETE_BATCH_SIZE = 1_000
 const decodeJson = Schema.decodeUnknownOption(Schema.UnknownFromJsonString)
 const decodeMessage = Schema.decodeUnknownOption(SessionV1.Info)
 const decodePart = Schema.decodeUnknownOption(SessionV1.Part)
@@ -485,7 +486,15 @@ export function run(options: Options = {}): Effect.Effect<RunResult, never, Data
           yield* db
             .transaction((tx) =>
               Effect.gen(function* () {
-                yield* tx.delete(EventTable).run()
+                while (true) {
+                  yield* tx.run(sql`
+                    DELETE FROM event
+                    WHERE rowid IN (SELECT rowid FROM event LIMIT ${EVENT_DELETE_BATCH_SIZE})
+                  `)
+                  const deleted = (yield* tx.get<{ value: number }>(sql`SELECT changes() AS value`))?.value ?? 0
+                  if (deleted < EVENT_DELETE_BATCH_SIZE) break
+                  yield* Effect.yieldNow
+                }
                 yield* tx
                   .insert(KVTable)
                   .values({ key: MIGRATION_STATE_KEY, value: { phase: "sessions" } })

packages/core/src/plugin/internal.ts

@@ -17,6 +17,7 @@ import { ConfigProviderPlugin } from "../config/plugin/provider"
 import { ConfigPolicyPlugin } from "../config/plugin/policy"
 import { ConfigReferencePlugin } from "../config/plugin/reference"
 import { ConfigSkillPlugin } from "../config/plugin/skill"
+import { ConfigPluginSource } from "../config/plugin/source"
 import { ConfigWebSearchPlugin } from "../config/plugin/websearch"
 import { Bus } from "../bus"
 import { Environment } from "../environment"
@@ -76,6 +77,7 @@ const services = Effect.fn("PluginInternal.services")(function* () {
   const command = yield* Command.Service
   const config = yield* Config.Service
   const credential = yield* Credential.Service
+  const pluginSources = yield* ConfigPluginSource.Service
   const bus = yield* Bus.Service
   const environment = yield* Environment.Service
   const mutation = yield* FileMutation.Service
@@ -112,6 +114,7 @@ const services = Effect.fn("PluginInternal.services")(function* () {
     Context.make(Command.Service, command),
     Context.make(Config.Service, config),
     Context.make(Credential.Service, credential),
+    Context.make(ConfigPluginSource.Service, pluginSources),
     Context.make(Bus.Service, bus),
     Context.make(Environment.Service, environment),
     Context.make(FileMutation.Service, mutation),
@@ -155,6 +158,7 @@ export const requirements = LayerNode.group([
   Command.node,
   Config.node,
   Credential.node,
+  ConfigPluginSource.node,
   Bus.node,
   Environment.node,
   FileMutation.node,

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const AlibabaPlugin = define({
+export const AlibabaPlugin = createProviderPlugin({
   id: "opencode.provider.alibaba",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/alibaba") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/alibaba"))
-        evt.sdk = mod.createAlibaba(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/alibaba",
+  load: async (options) => {
+    const { createAlibaba } = await import("@ai-sdk/alibaba")
+    return createAlibaba(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const CoherePlugin = define({
+export const CoherePlugin = createProviderPlugin({
   id: "opencode.provider.cohere",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/cohere") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/cohere"))
-        evt.sdk = mod.createCohere(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/cohere",
+  load: async (options) => {
+    const { createCohere } = await import("@ai-sdk/cohere")
+    return createCohere(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const DeepInfraPlugin = define({
+export const DeepInfraPlugin = createProviderPlugin({
   id: "opencode.provider.deepinfra",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/deepinfra") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/deepinfra"))
-        evt.sdk = mod.createDeepInfra(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/deepinfra",
+  load: async (options) => {
+    const { createDeepInfra } = await import("@ai-sdk/deepinfra")
+    return createDeepInfra(options)
+  },
 })

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

@@ -0,0 +1,22 @@
+import { define } from "@opencode-ai/plugin/effect/plugin"
+import type { AISDKHooks } from "@opencode-ai/plugin/effect/aisdk"
+import { Effect } from "effect"
+
+export function createProviderPlugin(input: {
+  readonly id: string
+  readonly package: string
+  readonly load: (options: AISDKHooks["sdk"]["options"]) => Promise<unknown>
+}) {
+  return define({
+    id: input.id,
+    effect: Effect.fn(function* (ctx) {
+      yield* ctx.aisdk.hook(
+        "sdk",
+        Effect.fn(function* (evt) {
+          if (evt.package !== input.package) return
+          evt.sdk = yield* Effect.promise(() => input.load(evt.options))
+        }),
+      )
+    }),
+  })
+}

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const GatewayPlugin = define({
+export const GatewayPlugin = createProviderPlugin({
   id: "opencode.provider.gateway",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/gateway") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/gateway"))
-        evt.sdk = mod.createGateway(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/gateway",
+  load: async (options) => {
+    const { createGateway } = await import("@ai-sdk/gateway")
+    return createGateway(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const GroqPlugin = define({
+export const GroqPlugin = createProviderPlugin({
   id: "opencode.provider.groq",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/groq") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/groq"))
-        evt.sdk = mod.createGroq(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/groq",
+  load: async (options) => {
+    const { createGroq } = await import("@ai-sdk/groq")
+    return createGroq(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const MistralPlugin = define({
+export const MistralPlugin = createProviderPlugin({
   id: "opencode.provider.mistral",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/mistral") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/mistral"))
-        evt.sdk = mod.createMistral(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/mistral",
+  load: async (options) => {
+    const { createMistral } = await import("@ai-sdk/mistral")
+    return createMistral(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const PerplexityPlugin = define({
+export const PerplexityPlugin = createProviderPlugin({
   id: "opencode.provider.perplexity",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/perplexity") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/perplexity"))
-        evt.sdk = mod.createPerplexity(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/perplexity",
+  load: async (options) => {
+    const { createPerplexity } = await import("@ai-sdk/perplexity")
+    return createPerplexity(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const TogetherAIPlugin = define({
+export const TogetherAIPlugin = createProviderPlugin({
   id: "opencode.provider.togetherai",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "@ai-sdk/togetherai") return
-        const mod = yield* Effect.promise(() => import("@ai-sdk/togetherai"))
-        evt.sdk = mod.createTogetherAI(evt.options)
-      }),
-    )
-  }),
+  package: "@ai-sdk/togetherai",
+  load: async (options) => {
+    const { createTogetherAI } = await import("@ai-sdk/togetherai")
+    return createTogetherAI(options)
+  },
 })

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

@@ -1,16 +1,10 @@
-import { Effect } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
+import { createProviderPlugin } from "./factory"
 
-export const VenicePlugin = define({
+export const VenicePlugin = createProviderPlugin({
   id: "opencode.provider.venice",
-  effect: Effect.fn(function* (ctx) {
-    yield* ctx.aisdk.hook(
-      "sdk",
-      Effect.fn(function* (evt) {
-        if (evt.package !== "venice-ai-sdk-provider") return
-        const mod = yield* Effect.promise(() => import("venice-ai-sdk-provider"))
-        evt.sdk = mod.createVenice(evt.options)
-      }),
-    )
-  }),
+  package: "venice-ai-sdk-provider",
+  load: async (options) => {
+    const { createVenice } = await import("venice-ai-sdk-provider")
+    return createVenice(options)
+  },
 })

packages/core/src/plugin/skill.ts

@@ -6,12 +6,8 @@ import { define, type Context } from "@opencode-ai/plugin/effect/plugin"
 import { Effect } from "effect"
 import { AbsolutePath } from "../schema"
 import { Skill } from "../skill"
-import { Config } from "../config"
-import { Location } from "../location"
-import { FSUtil } from "@opencode-ai/util/fs-util"
+import { ConfigPluginSource } from "../config/plugin/source"
 import os from "os"
-import path from "path"
-import { fileURLToPath } from "url"
 import opencodeContent from "./skill/opencode.md" with { type: "text" }
 import reportContent from "./skill/report.md" with { type: "text" }
 
@@ -72,32 +68,10 @@ const reportContentWithDiagnostics = Effect.fn("SkillPlugin.reportContentWithDia
 })
 
 const configuredPlugins = Effect.fn("SkillPlugin.configuredPlugins")(function* () {
-  const config = yield* Config.Service
-  const fs = yield* FSUtil.Service
-  const location = yield* Location.Service
-  return yield* Effect.forEach(yield* config.entries(), (entry) => {
-    if (entry.type === "document") {
-      const directory = entry.path ? path.dirname(entry.path) : location.directory
-      return Effect.succeed(
-        (entry.info.plugins ?? []).map((item) => {
-          const ref = typeof item === "string" ? { package: item } : item
-          if (ref.package.startsWith("file://")) return fileURLToPath(ref.package)
-          if (ref.package.startsWith("./") || ref.package.startsWith("../")) return path.resolve(directory, ref.package)
-          return ref.package
-        }),
-      )
-    }
-    if (entry.type !== "directory") return Effect.succeed([])
-    return fs
-      .scan("{plugin,plugins}/*.{ts,js}", {
-        cwd: entry.path,
-        absolute: true,
-        include: "file",
-        dot: true,
-        symlink: true,
-      })
-      .pipe(Effect.orElseSucceed(() => []))
-  }).pipe(Effect.map((items) => items.flat().toSorted()))
+  const sources = yield* ConfigPluginSource.Service
+  return (yield* sources.operations())
+    .map((operation) => (operation.type === "remove" ? `-${operation.target}` : operation.target))
+    .toSorted()
 })
 
 function terminal() {

packages/core/src/project.ts

@@ -2,7 +2,7 @@ export * as Project from "./project"
 
 import { Context, Effect, Layer, Schema } from "effect"
 import { ChildProcess } from "effect/unstable/process"
-import { asc, desc, isNotNull, isNull, ne, or } from "drizzle-orm"
+import { asc, desc } from "drizzle-orm"
 import path from "path"
 import { AbsolutePath } from "./schema"
 import { Database } from "./database/database"
@@ -13,7 +13,7 @@ import { makeGlobalNode } from "@opencode-ai/util/effect/app-node"
 import { Hash } from "@opencode-ai/util/hash"
 import { ProjectDirectories } from "./project/directories"
 import { ProjectSchema } from "./project/schema"
-import { ProjectTable } from "./project/sql"
+import { ProjectTable, upsertProject } from "./project/sql"
 
 export const ID = ProjectSchema.ID
 export type ID = ProjectSchema.ID
@@ -98,19 +98,7 @@ const layer = Layer.effect(
       yield* db
         .transaction((tx) =>
           Effect.gen(function* () {
-            const vcs = project.vcs?.type
-            yield* tx
-              .insert(ProjectTable)
-              .values({ id: project.id, worktree: project.canonical, vcs, sandboxes: [] })
-              .onConflictDoUpdate({
-                target: ProjectTable.id,
-                set: { worktree: project.canonical, vcs: vcs ?? null },
-                setWhere: or(
-                  ne(ProjectTable.worktree, project.canonical),
-                  vcs ? or(isNull(ProjectTable.vcs), ne(ProjectTable.vcs, vcs)) : isNotNull(ProjectTable.vcs),
-                ),
-              })
-              .run()
+            yield* upsertProject(tx, project)
             if (!project.vcs) return
             yield* projectDirectories.create({ projectID: project.id, directory: project.canonical }, tx)
             if (project.directory === project.canonical) return

packages/core/src/project/sql.ts

@@ -1,8 +1,14 @@
+import type { EffectDrizzleSqlite } from "@opencode-ai/effect-drizzle-sqlite"
+import { isNotNull, isNull, ne, or } from "drizzle-orm"
 import { sqliteTable, text, integer, primaryKey } from "drizzle-orm/sqlite-core"
 import { absoluteArrayColumn, absoluteColumn } from "../database/path"
 import { Timestamps } from "../database/schema.sql"
+import type { AbsolutePath } from "../schema"
 import { ProjectSchema } from "./schema"
 
+type DatabaseClient = EffectDrizzleSqlite.EffectSQLiteDatabase
+type Transaction = Parameters<Parameters<DatabaseClient["transaction"]>[0]>[0]
+
 export const ProjectTable = sqliteTable("project", {
   id: text().$type<ProjectSchema.ID>().primaryKey(),
   worktree: absoluteColumn().notNull(),
@@ -33,3 +39,22 @@ export const ProjectDirectoryTable = sqliteTable(
   },
   (table) => [primaryKey({ columns: [table.project_id, table.directory] })],
 )
+
+export function upsertProject(
+  db: DatabaseClient | Transaction,
+  project: { readonly id: ProjectSchema.ID; readonly canonical: AbsolutePath; readonly vcs?: ProjectSchema.Vcs },
+) {
+  const vcs = project.vcs?.type
+  return db
+    .insert(ProjectTable)
+    .values({ id: project.id, worktree: project.canonical, vcs, sandboxes: [] })
+    .onConflictDoUpdate({
+      target: ProjectTable.id,
+      set: { worktree: project.canonical, vcs: vcs ?? null },
+      setWhere: or(
+        ne(ProjectTable.worktree, project.canonical),
+        vcs ? or(isNull(ProjectTable.vcs), ne(ProjectTable.vcs, vcs)) : isNotNull(ProjectTable.vcs),
+      ),
+    })
+    .run()
+}

packages/core/src/session.ts

@@ -3,7 +3,7 @@ export * from "./session/schema"
 
 import { Effect, Layer, Schema, Context, Stream, Scope } from "effect"
 import { ListAnchor } from "@opencode-ai/schema/session"
-import { and, asc, desc, eq, gt, isNotNull, isNull, like, lt, ne, or, type SQL } from "drizzle-orm"
+import { and, asc, desc, eq, gt, isNull, like, lt, or, type SQL } from "drizzle-orm"
 import { Project } from "./project"
 import { Workspace } from "./workspace"
 import { Model } from "./model"
@@ -21,7 +21,7 @@ import { Agent } from "./agent"
 import { Money } from "@opencode-ai/schema/money"
 import { App } from "./app"
 import { Slug } from "./util/slug"
-import { ProjectTable } from "./project/sql"
+import { upsertProject } from "./project/sql"
 import path from "path"
 import { fromRow } from "./session/info"
 import { SessionRunner } from "./session/runner/index"
@@ -309,22 +309,7 @@ const layer = Layer.effect(
     const shellLocks = KeyedMutex.makeUnsafe<SessionSchema.ID>()
     const decodeMessage = Schema.decodeUnknownEffect(SessionMessage.Info)
     const isDurableSessionEvent = Schema.is(SessionEvent.Durable)
-    const persistProject = (project: Project.Resolved) => {
-      const vcs = project.vcs?.type
-      return db
-        .insert(ProjectTable)
-        .values({ id: project.id, worktree: project.canonical, vcs, sandboxes: [] })
-        .onConflictDoUpdate({
-          target: ProjectTable.id,
-          set: { worktree: project.canonical, vcs: vcs ?? null },
-          setWhere: or(
-            ne(ProjectTable.worktree, project.canonical),
-            vcs ? or(isNull(ProjectTable.vcs), ne(ProjectTable.vcs, vcs)) : isNotNull(ProjectTable.vcs),
-          ),
-        })
-        .run()
-        .pipe(Effect.orDie)
-    }
+    const persistProject = (project: Project.Resolved) => upsertProject(db, project).pipe(Effect.orDie)
     const decode = (row: typeof SessionMessageTable.$inferSelect) =>
       decodeMessage({ ...row.data, id: row.id, type: row.type }).pipe(
         Effect.mapError(
@@ -716,10 +701,11 @@ const layer = Layer.effect(
             .pipe(Effect.ignore, Effect.forkIn(scope, { startImmediately: true }), Effect.asVoid)
       }),
       switchAgent: Effect.fn("Session.switchAgent")(function* (input) {
-        yield* result.get(input.sessionID)
+        const session = yield* result.get(input.sessionID)
         yield* bus.publish(SessionEvent.AgentSelected, {
           sessionID: input.sessionID,
           agent: input.agent,
+          previous: session.agent,
         })
       }),
       switchModel: Effect.fn("Session.switchModel")(function* (input) {
@@ -733,6 +719,7 @@ const layer = Layer.effect(
         yield* bus.publish(SessionEvent.ModelSelected, {
           sessionID: input.sessionID,
           model: input.model,
+          previous: session.model,
         })
       }),
       rename: Effect.fn("Session.rename")(function* (input) {

packages/core/src/session/message-updater.ts

@@ -61,7 +61,7 @@ export function update(adapter: Adapter, event: SessionEvent.DurableEvent) {
       "session.usage.recorded": () => Effect.void,
       "session.agent.selected": (event) => {
         return Effect.gen(function* () {
-          const previous = yield* adapter.getAgent()
+          const previous = event.data.previous ?? (yield* adapter.getAgent())
           yield* adapter.appendMessage(
             SessionMessage.AgentSelected.make({
               id: SessionMessage.ID.fromEvent(event.id),
@@ -76,7 +76,7 @@ export function update(adapter: Adapter, event: SessionEvent.DurableEvent) {
       },
       "session.model.selected": (event) => {
         return Effect.gen(function* () {
-          const previous = yield* adapter.getModel()
+          const previous = event.data.previous ?? (yield* adapter.getModel())
           yield* adapter.appendMessage(
             SessionMessage.ModelSelected.make({
               id: SessionMessage.ID.fromEvent(event.id),

packages/core/src/session/transfer.ts

@@ -3,7 +3,7 @@ export * as SessionTransfer from "./transfer"
 import { SessionTransfer } from "@opencode-ai/schema/session-transfer"
 import { Tool } from "@opencode-ai/schema/tool"
 import { Skill } from "@opencode-ai/schema/skill"
-import { eq, isNotNull, isNull, ne, or } from "drizzle-orm"
+import { eq } from "drizzle-orm"
 import { Context, DateTime, Effect, Layer, Schema } from "effect"
 import path from "path"
 import { makeGlobalNode } from "@opencode-ai/util/effect/app-node"
@@ -12,7 +12,7 @@ import { Bus } from "../bus"
 import { Database } from "../database/database"
 import { Location } from "../location"
 import { Project } from "../project"
-import { ProjectTable } from "../project/sql"
+import { upsertProject } from "../project/sql"
 import { AbsolutePath, RelativePath } from "../schema"
 import { Session } from "../session"
 import { Slug } from "../util/slug"
@@ -49,22 +49,7 @@ const layer = Layer.effect(
     const sessions = yield* Session.Service
     const encodeMessage = Schema.encodeSync(SessionMessage.Info)
 
-    const persistProject = (project: Project.Resolved) => {
-      const vcs = project.vcs?.type
-      return db
-        .insert(ProjectTable)
-        .values({ id: project.id, worktree: project.canonical, vcs, sandboxes: [] })
-        .onConflictDoUpdate({
-          target: ProjectTable.id,
-          set: { worktree: project.canonical, vcs: vcs ?? null },
-          setWhere: or(
-            ne(ProjectTable.worktree, project.canonical),
-            vcs ? or(isNull(ProjectTable.vcs), ne(ProjectTable.vcs, vcs)) : isNotNull(ProjectTable.vcs),
-          ),
-        })
-        .run()
-        .pipe(Effect.orDie)
-    }
+    const persistProject = (project: Project.Resolved) => upsertProject(db, project).pipe(Effect.orDie)
 
     return Service.of({
       export: Effect.fn("SessionTransfer.export")(function* (input) {

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

@@ -21,7 +21,7 @@ Usage notes:
 - If you recommend a specific option, make that the first option in the list and add "(Recommended)" at the end of the label`
 
 export const Input = Schema.Struct({
-  questions: Schema.NonEmptyArray(Question.Prompt).annotate({ description: "Questions to ask" }),
+  questions: Schema.Array(Question.Prompt).check(Schema.isNonEmpty()).annotate({ description: "Questions to ask" }),
 })
 
 export const Output = Schema.Struct({

packages/core/test/config/plugin.test.ts

@@ -168,6 +168,75 @@ describe("PluginSupervisor config", () => {
     ),
   )
 
+  it.live("loads auto-discovered plugin package entrypoints in order", () =>
+    withLocation(
+      undefined,
+      Effect.gen(function* () {
+        yield* ready()
+        const plugins = yield* Plugin.Service
+        const ids = (yield* plugins.list()).map((plugin) => String(plugin.id))
+        expect(ids).toContain("package-exports")
+        expect(ids).toContain("package-module")
+        expect(ids).toContain("package-main")
+        expect(ids).toContain("package-index")
+      }),
+      false,
+      async (directory) => {
+        await Promise.all([
+          writeDiscoveredPackage(directory, "exports", { exports: "./entry.ts" }, { "entry.ts": "package-exports" }),
+          writeDiscoveredPackage(
+            directory,
+            "module",
+            { exports: "./missing.js", module: "./entry.js" },
+            { "entry.js": "package-module" },
+          ),
+          writeDiscoveredPackage(
+            directory,
+            "main",
+            { exports: { import: "./missing.js" }, module: "./missing.js", main: "./entry.js" },
+            { "entry.js": "package-main" },
+          ),
+          writeDiscoveredPackage(directory, "index", undefined, { "index.js": "package-index" }),
+        ])
+      },
+    ),
+  )
+
+  it.live("keeps auto-discovered package entrypoints inside the package directory", () =>
+    withLocation(
+      undefined,
+      Effect.gen(function* () {
+        yield* ready()
+        const plugins = yield* Plugin.Service
+        const ids = (yield* plugins.list()).map((plugin) => String(plugin.id))
+        expect(ids).toContain("contained-fallback")
+        expect(ids).toContain("symlink-fallback")
+        expect(ids).not.toContain("escaped-entrypoint")
+      }),
+      false,
+      async (directory) => {
+        await fs.mkdir(path.join(directory, ".opencode"), { recursive: true })
+        await fs.writeFile(path.join(directory, ".opencode", "escape.js"), discoveredPlugin("escaped-entrypoint"))
+        await writeDiscoveredPackage(
+          directory,
+          "contained",
+          { exports: "../../escape.js" },
+          { "index.js": "contained-fallback" },
+        )
+        await writeDiscoveredPackage(
+          directory,
+          "symlink",
+          { exports: "./entry.js" },
+          { "index.js": "symlink-fallback" },
+        )
+        await fs.symlink(
+          path.join(directory, ".opencode", "escape.js"),
+          path.join(directory, ".opencode", "plugins", "symlink", "entry.js"),
+        )
+      },
+    ),
+  )
+
   staticIt.live("uses only internal and SDK plugins when the static source is wired", () =>
     Effect.gen(function* () {
       const sdk = yield* SdkPlugins.Service
@@ -389,3 +458,21 @@ export default Plugin.define({
 })
 `
 }
+
+function discoveredPlugin(id: string) {
+  return `export default { id: ${JSON.stringify(id)}, setup() {} }`
+}
+
+async function writeDiscoveredPackage(
+  directory: string,
+  name: string,
+  manifest: Record<string, unknown> | undefined,
+  files: Record<string, string>,
+) {
+  const plugin = path.join(directory, ".opencode", "plugins", name)
+  await fs.mkdir(plugin, { recursive: true })
+  await Promise.all([
+    ...(manifest ? [fs.writeFile(path.join(plugin, "package.json"), JSON.stringify(manifest))] : []),
+    ...Object.entries(files).map(([file, id]) => fs.writeFile(path.join(plugin, file), discoveredPlugin(id))),
+  ])
+}

packages/core/test/plugin/skill.test.ts

@@ -1,18 +1,18 @@
 import { describe, expect } from "bun:test"
-import { NodeFileSystem } from "@effect/platform-node"
-import { Config } from "@opencode-ai/core/config"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
-import { FSUtil } from "@opencode-ai/util/fs-util"
-import { Location } from "@opencode-ai/core/location"
-import { Effect, Stream } from "effect"
+import { ConfigPluginSource } from "@opencode-ai/core/config/plugin/source"
+import { Effect, Layer, Stream } from "effect"
 import { SkillPlugin } from "@opencode-ai/core/plugin/skill"
-import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Skill } from "@opencode-ai/core/skill"
-import { location } from "../fixture/location"
 import { testEffect } from "../lib/effect"
 import { host } from "./host"
 
 const it = testEffect(AppNodeBuilder.build(Skill.node))
+const sources = (operations: readonly ConfigPluginSource.Operation[] = []) =>
+  Layer.succeed(
+    ConfigPluginSource.Service,
+    ConfigPluginSource.Service.of({ operations: () => Effect.succeed(operations), changes: () => Stream.never }),
+  )
 
 describe("SkillPlugin.Plugin", () => {
   it.effect("registers built-in skills", () =>
@@ -27,15 +27,7 @@ describe("SkillPlugin.Plugin", () => {
             reload: skill.reload,
           },
         }),
-      ).pipe(
-        Effect.provide(Config.testLayer()),
-        Effect.provideService(
-          Location.Service,
-          Location.Service.of(location({ directory: AbsolutePath.make(import.meta.dir) })),
-        ),
-        Effect.provide(AppNodeBuilder.build(FSUtil.node)),
-        Effect.provide(NodeFileSystem.layer),
-      )
+      ).pipe(Effect.provide(sources()))
       const skills = yield* skill.list()
       const report = skills.find((item) => item.id === "report")
 
@@ -58,4 +50,30 @@ describe("SkillPlugin.Plugin", () => {
       expect(report?.content).toContain("- install/channel: beta")
     }),
   )
+
+  it.effect("reports canonical configured plugin sources with existing labels and ordering", () =>
+    Effect.gen(function* () {
+      const skill = yield* Skill.Service
+      yield* SkillPlugin.Plugin.effect(
+        host({
+          skill: {
+            list: () => Effect.die("unused skill.list"),
+            transform: skill.transform,
+            reload: skill.reload,
+          },
+        }),
+      )
+      const report = (yield* skill.list()).find((item) => item.id === "report")
+      expect(report?.content).toContain("- Active plugins: -disabled, local.ts, package-plugin, package-plugin")
+    }).pipe(
+      Effect.provide(
+        sources([
+          { type: "add", target: "package-plugin", options: {} },
+          { type: "remove", target: "disabled" },
+          { type: "add", target: "local.ts", options: {}, mtime: 1 },
+          { type: "add", target: "package-plugin", options: { enabled: true } },
+        ]),
+      ),
+    ),
+  )
 })

packages/core/test/session-create.test.ts

@@ -654,7 +654,7 @@ describe("Session.create", () => {
       expect(yield* session.get(created.id)).toMatchObject({ agent: "plan" })
       expect(
         Array.from(yield* logEvents(session, created.id, true).pipe(Stream.drop(1), Stream.take(1), Stream.runCollect)),
-      ).toMatchObject([{ type: "session.agent.selected", data: { agent: "plan" } }])
+      ).toMatchObject([{ type: "session.agent.selected", data: { agent: "plan", previous: "build" } }])
       expect(yield* session.messages({ sessionID: created.id, order: "asc" })).toMatchObject([
         { type: "agent-switched", agent: "plan", previous: "build" },
       ])
@@ -678,7 +678,12 @@ describe("Session.create", () => {
   it.effect("switches the selected model through the durable Session event", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
-      const created = yield* session.create({ location })
+      const previous = Model.Ref.make({
+        id: Model.ID.make("haiku"),
+        providerID: Provider.ID.anthropic,
+        variant: Model.VariantID.make("default"),
+      })
+      const created = yield* session.create({ location, model: previous })
       const model = Model.Ref.make({
         id: Model.ID.make("sonnet"),
         providerID: Provider.ID.anthropic,
@@ -692,7 +697,10 @@ describe("Session.create", () => {
         yield* logEvents(session, created.id, true).pipe(Stream.drop(1), Stream.take(1), Stream.runCollect),
       )
       expect(bus).toMatchObject([{ type: "session.model.selected" }])
-      expect(bus[0]?.data).toEqual({ sessionID: created.id, model })
+      expect(bus[0]?.data).toEqual({ sessionID: created.id, model, previous })
+      expect(yield* session.messages({ sessionID: created.id, order: "asc" })).toMatchObject([
+        { type: "model-switched", model, previous },
+      ])
     }),
   )
 

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

@@ -89,6 +89,30 @@ const it = testEffect(
 )
 
 describe("QuestionTool", () => {
+  it.effect("emits one item schema for the nonempty questions array", () =>
+    Effect.gen(function* () {
+      captured = undefined
+      const registry = yield* Tool.Service
+      const definition = (yield* toolDefinitions(registry)).find((tool) => tool.name === QuestionTool.name)
+
+      expect(definition?.inputSchema).toHaveProperty("properties.questions.type", "array")
+      expect(definition?.inputSchema).toHaveProperty("properties.questions.minItems", 1)
+      expect(definition?.inputSchema).toHaveProperty("properties.questions.items")
+      expect(definition?.inputSchema).not.toHaveProperty("properties.questions.prefixItems")
+      expect(
+        yield* executeTool(registry, {
+          sessionID,
+          ...toolIdentity,
+          call: { type: "tool-call", id: "call-question-empty", name: QuestionTool.name, input: { questions: [] } },
+        }),
+      ).toMatchObject({
+        status: "error",
+        error: { type: "tool.execution", message: expect.stringContaining("Invalid tool input") },
+      })
+      expect(capturedInput()).toBeUndefined()
+    }),
+  )
+
   it.effect("omits a catalog-denied question and enforces its leaf permission", () =>
     Effect.gen(function* () {
       captured = undefined

packages/core/test/v1-migration.test.ts

@@ -11,7 +11,7 @@ import { Project } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Global } from "@opencode-ai/util/global"
-import { Effect, Layer, Logger, Schedule, Schema, Scope } from "effect"
+import { Effect, Fiber, Layer, Logger, Schedule, Schema, Scope } from "effect"
 import { eq, sql } from "drizzle-orm"
 import type { SqlClient } from "effect/unstable/sql/SqlClient"
 import { tmpdir } from "./fixture/tmpdir"
@@ -798,6 +798,35 @@ describe("V1Migration database workflow", () => {
     )
   })
 
+  test("yields while clearing stale events in batches", async () => {
+    await database(
+      Effect.gen(function* () {
+        const { db } = yield* Database.Service
+        yield* db.run(sql`INSERT INTO event_sequence (aggregate_id, seq) VALUES ('stale', 2500)`)
+        yield* db.run(sql`
+          WITH RECURSIVE rows(value) AS (
+            VALUES(1)
+            UNION ALL
+            SELECT value + 1 FROM rows WHERE value < 2500
+          )
+          INSERT INTO event (id, aggregate_id, seq, created, type, data)
+          SELECT printf('event_%04d', value), 'stale', value, 1, 'session.renamed.1', '{}'
+          FROM rows
+        `)
+        let yielded = false
+        const heartbeat = yield* Effect.yieldNow.pipe(
+          Effect.andThen(Effect.sync(() => (yielded = true))),
+          Effect.forkChild({ startImmediately: true }),
+        )
+
+        expect(yield* V1Migration.run()).toEqual({ status: "completed" })
+        expect(yielded).toBe(true)
+        yield* Fiber.join(heartbeat)
+        expect(yield* db.get<{ value: number }>(sql`SELECT COUNT(*) AS value FROM event`)).toEqual({ value: 0 })
+      }),
+    )
+  })
+
   test("imports previous V2 sessions and messages as part of the migration", async () => {
     await using tmp = await tmpdir()
     const filename = path.join(tmp.path, "opencode-next.db")

packages/desktop/src/main/background-cli.ts

@@ -37,6 +37,7 @@ export async function startBackgroundCli(logger: Logger) {
     url: service.url,
     username: service.auth.username,
     password: service.auth.password,
+    version,
   }
 }
 

packages/desktop/src/main/index.ts

@@ -134,10 +134,10 @@ const main = Effect.gen(function* () {
   initCrashReporter()
 
   const wslServers = createWslServersController(
-    app.getVersion(),
-    async (distro) => {
+    CHANNEL === "beta" ? null : app.getVersion(),
+    async (distro, version, channel) => {
       logger.log("spawning wsl sidecar", { distro })
-      return spawnWslSidecar(distro, {
+      return spawnWslSidecar(distro, version, channel, {
         onLine: (line) => logger.log("wsl sidecar", { distro, stream: line.stream, text: line.text }),
       })
     },
@@ -146,6 +146,7 @@ const main = Effect.gen(function* () {
         log: (message, meta) => logger.log(message, meta),
         error: (message, meta) => logger.error(message, meta),
       },
+      channel: CHANNEL,
     },
   )
   const stopSidecars = async () => wslServers.stopAll()
@@ -311,6 +312,7 @@ const main = Effect.gen(function* () {
 
     logger.log("starting v2 background service")
     const sidecar = yield* Effect.promise(() => startBackgroundCli(logger))
+    if (CHANNEL === "beta") wslServers.setCliVersion(sidecar.version)
     yield* Deferred.succeed(serverReady, {
       url: sidecar.url,
       username: sidecar.username,

packages/desktop/src/main/wsl/runtime.ts

@@ -264,18 +264,22 @@ export async function installWslDistro(name: string, opts?: RunWslOptions) {
   )
 }
 
-export async function installWslOpencode(version: string, distro: string, opts?: RunWslOptions) {
+export async function installWslOpencode(version: string, channel: string, distro: string, opts?: RunWslOptions) {
   return runInteractiveCommand(
     resolveSystem32Command("wsl.exe"),
-    wslArgs(
-      ["bash", "-lc", `curl -fsSL https://opencode.ai/install | bash -s -- --version ${shellEscape(version)}`],
-      distro,
-    ),
+    wslArgs(["bash", "-lc", wslOpencodeInstallCommand(version, channel)], distro),
     withTimeout(opts, DEFAULT_WSL_INSTALL_TIMEOUT_MS),
     DEFAULT_WSL_INSTALL_TIMEOUT_MS,
   )
 }
 
+export function wslOpencodeInstallCommand(version: string, channel: string) {
+  if (channel === "beta") {
+    return `npm install --global --no-audit --no-fund ${shellEscape(`@opencode-ai/cli@${version}`)}`
+  }
+  return `curl -fsSL https://opencode.ai/install | bash -s -- --version ${shellEscape(version)}`
+}
+
 export async function probeWslDistro(name: string, opts?: RunWslOptions): Promise<WslDistroProbe> {
   const executable = await runWslInDistro(["/bin/true"], name, opts).catch((error) => ({
     code: 1,
@@ -307,11 +311,22 @@ export async function probeWslDistro(name: string, opts?: RunWslOptions): Promis
   }
 }
 
-export async function resolveWslOpencode(distro: string, opts?: RunWslOptions) {
+export async function resolveWslOpencode(distro: string, channel: string, opts?: RunWslOptions) {
+  if (channel !== "beta") {
+    return firstLine(
+      (
+        await runWslSh(
+          'if [ -x "$HOME/.opencode/bin/opencode" ]; then printf "%s\\n" "$HOME/.opencode/bin/opencode"; fi',
+          distro,
+          opts,
+        )
+      ).stdout,
+    )
+  }
   return firstLine(
     (
       await runWslSh(
-        'if [ -x "$HOME/.opencode/bin/opencode" ]; then printf "%s\\n" "$HOME/.opencode/bin/opencode"; fi',
+        'PATH=$(awk -v RS=: -v ORS=: \'$0 !~ /^\\/mnt\\//\' <<<"$PATH" | sed "s/:$//"); export PATH; command -v opencode2 || true',
         distro,
         opts,
       )
@@ -321,7 +336,13 @@ export async function resolveWslOpencode(distro: string, opts?: RunWslOptions) {
 
 export async function readWslCommandVersion(command: string, distro: string, opts?: RunWslOptions) {
   const result = await runWslSh(`${shellEscape(command)} --version 2>/dev/null || true`, distro, opts)
-  return firstLine(result.stdout)
+  return parseWslOpencodeVersion(firstLine(result.stdout))
+}
+
+export function parseWslOpencodeVersion(output: string | null) {
+  if (!output) return null
+  const marker = output.lastIndexOf(" v")
+  return marker === -1 ? output : output.slice(marker + 2)
 }
 
 export function openWslTerminal(distro?: string | null) {

packages/desktop/src/main/wsl/servers.test.ts

@@ -13,6 +13,10 @@ import {
   wslServerIdsToStartOnInitialize,
 } from "./startup"
 import { createWslServersController, type WslServerConfig } from "./servers"
+import {
+  parseWslOpencodeVersion,
+  wslOpencodeInstallCommand,
+} from "./runtime"
 
 let persistedServers: WslServerConfig[] = []
 let releaseOpencodeResolve: (() => void) | undefined
@@ -33,6 +37,51 @@ test("rejects an update that did not install the desktop version", () => {
   )
 })
 
+test("installs the exact V2 CLI package through npm", () => {
+  const version = "0.0.0-next-17181"
+  const command = wslOpencodeInstallCommand(version, "beta")
+
+  expect(command).toBe("npm install --global --no-audit --no-fund '@opencode-ai/cli@0.0.0-next-17181'")
+  expect(command).not.toContain("@next")
+  expect(command).not.toContain("https://opencode.ai/install")
+})
+
+test("keeps the curl installer outside the beta channel", () => {
+  expect(wslOpencodeInstallCommand("1.18.16", "prod")).toBe(
+    "curl -fsSL https://opencode.ai/install | bash -s -- --version '1.18.16'",
+  )
+  expect(wslOpencodeInstallCommand("1.18.16", "dev")).toBe(
+    "curl -fsSL https://opencode.ai/install | bash -s -- --version '1.18.16'",
+  )
+})
+
+test("reads the version reported by the V2 binary", () => {
+  expect(parseWslOpencodeVersion("opencode2 v0.0.0-next-17181")).toBe("0.0.0-next-17181")
+  expect(parseWslOpencodeVersion("1.18.16")).toBe("1.18.16")
+})
+
+test("installs the bundled CLI version instead of the Desktop release version", async () => {
+  persistedServers = []
+  let requested: { version: string; channel: string; distro: string } | undefined
+  const controller = createWslServersController(null, async () => new Promise<never>(() => undefined), {
+    channel: "beta",
+    readServers: () => persistedServers,
+    writeServers: () => undefined,
+    resolveOpencode: async () => "/home/me/.npm/bin/opencode2",
+    readCommandVersion: async () => "0.0.0-next-17181",
+    installOpencode: async (version, channel, distro) => {
+      requested = { version, channel, distro }
+      return { code: 0, signal: null, stdout: "", stderr: "" }
+    },
+  })
+  controller.setCliVersion("0.0.0-next-17181")
+
+  await controller.installOpencode("Debian")
+
+  expect(requested).toEqual({ version: "0.0.0-next-17181", channel: "beta", distro: "Debian" })
+  expect(controller.getState().opencodeChecks.Debian?.matchesDesktop).toBe(true)
+})
+
 test("restarts an existing distro server after updating OpenCode", () => {
   expect(
     wslServerIdToRestart(
@@ -55,7 +104,7 @@ test("clears cached distro probes when removing a WSL server", () => {
       {
         Debian: {
           distro: "Debian",
-          resolvedPath: "/home/luke/.opencode/bin/opencode",
+          resolvedPath: "/home/luke/.local/share/opencode/desktop/beta/1.16.2/opencode2",
           version: "1.16.2",
           expectedVersion: "1.16.2",
           matchesDesktop: true,
@@ -164,7 +213,7 @@ test("probes addable distros in parallel before checking OpenCode", async () =>
     },
     resolveOpencode: async (distro) => {
       opencode.push(distro)
-      return "/home/me/.opencode/bin/opencode"
+      return "/home/me/.local/share/opencode/desktop/dev/1.16.2/opencode2"
     },
   })
 
@@ -195,7 +244,7 @@ test("does not check OpenCode in addable distros that cannot execute commands",
     }),
     resolveOpencode: async (distro) => {
       opencode.push(distro)
-      return "/home/me/.opencode/bin/opencode"
+      return "/home/me/.local/share/opencode/desktop/dev/1.16.2/opencode2"
     },
   })
 
@@ -225,7 +274,7 @@ function testControllerOptions() {
       await new Promise<void>((resolve) => {
         releaseOpencodeResolve = resolve
       })
-      return "/home/me/.opencode/bin/opencode"
+      return "/home/me/.local/share/opencode/desktop/dev/1.16.2/opencode2"
     },
   }
 }

packages/desktop/src/main/wsl/servers.ts

@@ -37,7 +37,7 @@ type RunningSidecar = {
   password: string
 }
 
-type SpawnSidecar = (distro: string) => Promise<RunningSidecar>
+type SpawnSidecar = (distro: string, version: string, channel: string) => Promise<RunningSidecar>
 
 type ControllerLogger = {
   log: (message: string, meta?: unknown) => void
@@ -51,6 +51,8 @@ type WslServersControllerOptions = {
   probeDistro?: typeof probeWslDistro
   resolveOpencode?: typeof resolveWslOpencode
   readCommandVersion?: typeof readWslCommandVersion
+  installOpencode?: typeof installWslOpencode
+  channel?: string
 }
 
 export type WslServersController = ReturnType<typeof createWslServersController>
@@ -60,7 +62,7 @@ export function wslServerIdForDistro(distro: string) {
 }
 
 export function createWslServersController(
-  appVersion: string,
+  initialCliVersion: string | null,
   spawnSidecar: SpawnSidecar,
   options?: WslServersControllerOptions,
 ) {
@@ -69,10 +71,17 @@ export function createWslServersController(
   const sidecars = new Map<string, RunningSidecar>()
   const startAttempts = new Map<string, number>()
   let jobAbort: AbortController | undefined
+  let cliVersion = initialCliVersion
   const logger = options?.logger
   const readServers = options?.readServers ?? readPersistedServers
   const writeServers = options?.writeServers ?? writePersistedServers
   const probeDistro = options?.probeDistro ?? probeWslDistro
+  const channel = options?.channel ?? "dev"
+
+  const expectedVersion = () => {
+    if (cliVersion) return cliVersion
+    throw new Error(nativeT("desktop.wsl.error.opencodeCannotRun"))
+  }
 
   const emit = () => {
     for (const listener of listeners) listener({ type: "state", state })
@@ -132,11 +141,12 @@ export function createWslServersController(
   }
 
   const checkOpencode = async (distro: string, opts?: { signal?: AbortSignal }) => {
-    const resolved = await (options?.resolveOpencode ?? resolveWslOpencode)(distro, opts)
-    const version = resolved
+    const version = expectedVersion()
+    const resolved = await (options?.resolveOpencode ?? resolveWslOpencode)(distro, channel, opts)
+    const installed = resolved
       ? await (options?.readCommandVersion ?? readWslCommandVersion)(resolved, distro, opts)
       : null
-    return opencodeCheck(distro, resolved, version, appVersion)
+    return opencodeCheck(distro, resolved, installed, version)
   }
 
   const refreshOpencodeCheck = async (distro: string, opts?: { signal?: AbortSignal }) => {
@@ -229,7 +239,7 @@ export function createWslServersController(
     setRuntime(id, { kind: "starting" })
     logger?.log("wsl sidecar starting", { id, distro: item.config.distro })
     try {
-      const sidecar = await spawnSidecar(item.config.distro)
+      const sidecar = await spawnSidecar(item.config.distro, expectedVersion(), channel)
       if (!isCurrentStartAttempt(id, attempt)) {
         try {
           sidecar.listener.stop()
@@ -294,6 +304,10 @@ export function createWslServersController(
   }
 
   return {
+    setCliVersion(version: string) {
+      cliVersion = version
+    },
+
     getState() {
       return state
     },
@@ -362,12 +376,15 @@ export function createWslServersController(
 
     async installOpencode(name: string) {
       await runJob({ kind: "install-opencode", distro: name, startedAt: Date.now() }, async (abort) => {
-        const result = await installWslOpencode(appVersion, name, { signal: abort.signal })
+        const version = expectedVersion()
+        const result = await (options?.installOpencode ?? installWslOpencode)(version, channel, name, {
+          signal: abort.signal,
+        })
         if (result.code !== 0) {
           throw new Error(summarize(result.stderr || result.stdout) || nativeT("desktop.wsl.error.installOpencode"))
         }
         await refreshOpencodeCheck(name, { signal: abort.signal })
-        expectOpencodeVersion(state.opencodeChecks[name]?.version ?? null, appVersion, name)
+        expectOpencodeVersion(state.opencodeChecks[name]?.version ?? null, version, name)
         const id = wslServerIdToRestart(state.servers, name)
         if (id) await startServer(id)
       })

packages/desktop/src/main/wsl/sidecar.ts

@@ -3,7 +3,7 @@ import { randomUUID } from "node:crypto"
 import { createServer } from "node:net"
 import { app } from "electron"
 import { checkHealth } from "../server"
-import { type WslCommandLine, resolveWslOpencode, shellEscape, wslArgs } from "./runtime"
+import { type WslCommandLine, readWslCommandVersion, resolveWslOpencode, shellEscape, wslArgs } from "./runtime"
 import { pollWslHealth } from "./startup"
 import { nativeT } from "../native-translations"
 
@@ -16,10 +16,22 @@ export type WslSidecar = {
 
 export async function spawnWslSidecar(
   distro: string,
+  version: string,
+  channel: string,
   opts: { onLine?: (line: WslCommandLine) => void; healthTimeoutMs?: number } = {},
 ): Promise<WslSidecar> {
-  const opencode = await resolveWslOpencode(distro)
+  const opencode = await resolveWslOpencode(distro, channel)
   if (!opencode) throw new Error(nativeT("desktop.wsl.error.opencodeNotInstalled", { distro }))
+  const installed = await readWslCommandVersion(opencode, distro)
+  if (installed !== version) {
+    throw new Error(
+      nativeT("desktop.wsl.error.updateVersion", {
+        distro,
+        installed: installed ?? nativeT("desktop.wsl.error.noVersion"),
+        expected: version,
+      }),
+    )
+  }
 
   const port = await allocatePort()
   const password = randomUUID()

packages/merman/src/markdown.ts

@@ -1,6 +1,5 @@
 import {
   TextRenderable,
-  BoxRenderable,
   RenderableEvents,
   createMarkdownCodeBlockRenderer,
   parseColor,
@@ -34,7 +33,6 @@ interface PreparedDiagram {
   readonly source: string
   readonly text: StyledText
   readonly height: number
-  readonly width: number
 }
 
 export interface MermaidMarkdownRendererOptions {
@@ -57,23 +55,16 @@ function color(value: ColorInput | undefined): RGBA | undefined {
   return value === undefined ? undefined : parseColor(value)
 }
 
-class StaticDiagramRenderable extends BoxRenderable {
+class StaticDiagramRenderable extends TextRenderable {
   constructor(ctx: RenderContext, prepared: PreparedDiagram) {
     super(ctx, {
-      width: "100%",
-      alignItems: "flex-start",
-      flexShrink: 0,
-      marginTop: 1,
-    })
-    const diagram = new TextRenderable(ctx, {
       content: prepared.text,
-      width: prepared.width,
-      maxWidth: "100%",
+      width: "100%",
       height: prepared.height,
       wrapMode: "none",
       selectable: false,
+      marginTop: 1,
     })
-    this.add(diagram)
     let dragX: number | undefined
     this.onMouseDown = (event: MouseEvent) => {
       if (event.button !== 0) return
@@ -88,7 +79,7 @@ class StaticDiagramRenderable extends BoxRenderable {
       if (dragX === undefined) return
       const dx = event.x - dragX
       dragX = event.x
-      if (dx) diagram.scrollX -= dx
+      if (dx) this.scrollX -= dx
     }
     this.onMouseDragEnd = (event: MouseEvent) => {
       dragX = undefined
@@ -130,7 +121,6 @@ function prepareDiagram(kind: DiagramKind, source: string, options: MermaidMarkd
           }),
         ),
         height: size.height,
-        width: size.width,
       }
     }
     case "sequence": {
@@ -154,7 +144,6 @@ function prepareDiagram(kind: DiagramKind, source: string, options: MermaidMarkd
           }),
         ),
         height: size.height,
-        width: size.width,
       }
     }
     case "state": {
@@ -179,7 +168,6 @@ function prepareDiagram(kind: DiagramKind, source: string, options: MermaidMarkd
           }),
         ),
         height: size.height,
-        width: size.width,
       }
     }
   }

packages/merman/src/test/markdown.test.ts

@@ -2,7 +2,7 @@ import { afterAll, afterEach, beforeAll, expect, test } from "bun:test"
 import { mkdir } from "node:fs/promises"
 import { tmpdir } from "node:os"
 import { join } from "node:path"
-import { CodeRenderable, MarkdownRenderable, RGBA, SyntaxStyle, TextRenderable, TreeSitterClient } from "@opentui/core"
+import { CodeRenderable, MarkdownRenderable, RGBA, SyntaxStyle, TreeSitterClient } from "@opentui/core"
 import { createTestRenderer } from "@opentui/core/testing"
 import { createMermaidMarkdownRenderer } from "../markdown.js"
 
@@ -78,31 +78,6 @@ flowchart LR
   expect(markdown.getChildren()[0]?.marginTop).toBe(1)
 })
 
-test("leaves Mermaid alignment to its containing layout", async () => {
-  const testRenderer = await createTestRenderer({ width: 80, height: 14 })
-  renderer = testRenderer.renderer
-  const markdown = new MarkdownRenderable(renderer, {
-    id: "markdown-centered-mermaid",
-    content: `\`\`\`mermaid
-flowchart LR
-  A[Start] --> B[Done]
-\`\`\``,
-    syntaxStyle,
-    treeSitterClient,
-    renderNode: createMermaidMarkdownRenderer(renderer),
-  })
-
-  renderer.root.add(markdown)
-  await renderMarkdown(markdown, testRenderer.renderOnce)
-
-  const line = testRenderer
-    .captureCharFrame()
-    .split("\n")
-    .find((value) => value.includes("Start"))
-  if (!line) throw new Error("Expected the rendered diagram")
-  expect(line.indexOf("Start")).toBeLessThan(10)
-})
-
 test("recognizes normalized Mermaid fence info strings", async () => {
   const testRenderer = await createTestRenderer({ width: 80, height: 14 })
   renderer = testRenderer.renderer
@@ -260,19 +235,17 @@ sequenceDiagram
   renderer.root.add(markdown)
   await renderMarkdown(markdown, testRenderer.renderOnce)
 
-  const wrapper = markdown.getChildren()[0]
-  if (!wrapper) throw new Error("Expected the rendered diagram wrapper")
-  const diagram = wrapper.getChildren()[0] as TextRenderable
+  const diagram = markdown.getChildren()[0] as CodeRenderable
   expect(diagram.scrollWidth).toBeGreaterThan(diagram.width)
   expect(diagram.scrollX).toBe(0)
 
-  await testRenderer.mockMouse.drag(wrapper.x + 20, wrapper.y + 2, wrapper.x + 5, wrapper.y + 2)
+  await testRenderer.mockMouse.drag(diagram.x + 20, diagram.y + 2, diagram.x + 5, diagram.y + 2)
   await testRenderer.renderOnce()
   expect(diagram.scrollX).toBeGreaterThan(0)
   expect(diagram.hasSelection()).toBe(false)
 
   diagram.scrollX = 0
-  await testRenderer.mockMouse.scroll(wrapper.x + 20, wrapper.y + 2, "right")
+  await testRenderer.mockMouse.scroll(diagram.x + 20, diagram.y + 2, "right")
   await testRenderer.renderOnce()
   expect(diagram.scrollX).toBeGreaterThan(0)
 })

packages/protocol/openapi.json

@@ -14373,6 +14373,9 @@
               },
               "agent": {
                 "type": "string"
+              },
+              "previous": {
+                "type": "string"
               }
             },
             "required": ["sessionID", "agent"],
@@ -14441,6 +14444,9 @@
               },
               "model": {
                 "$ref": "#/components/schemas/Model.Ref"
+              },
+              "previous": {
+                "$ref": "#/components/schemas/Model.Ref"
               }
             },
             "required": ["sessionID", "model"],

packages/schema/src/session-event.ts

@@ -69,6 +69,7 @@ export const AgentSelected = Event.durable({
   schema: {
     ...Base,
     agent: Agent.ID,
+    previous: Agent.ID.pipe(optional),
   },
 })
 export type AgentSelected = typeof AgentSelected.Type
@@ -79,6 +80,7 @@ export const ModelSelected = Event.durable({
   schema: {
     ...Base,
     model: Model.Ref,
+    previous: Model.Ref.pipe(optional),
   },
 })
 export type ModelSelected = typeof ModelSelected.Type

packages/server/src/handlers/model.ts

@@ -12,6 +12,19 @@ export const ModelHandler = HttpApiBuilder.group(Api, "server.model", (handlers)
       .handle(
         "model.list",
         Effect.fn(function* () {
+          const plugins = yield* PluginSupervisor.Service
+          yield* plugins.flush.pipe(
+            Effect.timeoutOrElse({
+              duration: "5 seconds",
+              orElse: () =>
+                Effect.fail(
+                  new ServiceUnavailableError({
+                    message: "Model catalog initialization timed out",
+                    service: "model.catalog",
+                  }),
+                ),
+            }),
+          )
           const catalog = yield* Catalog.Service
           return yield* response(catalog.model.available())
         }),

packages/server/test/model.test.ts

@@ -0,0 +1,57 @@
+import fs from "node:fs/promises"
+import path from "node:path"
+import { expect } from "bun:test"
+import { Effect } from "effect"
+import { HttpServer } from "effect/unstable/http"
+import { tmpdir } from "../../core/test/fixture/tmpdir"
+import { it } from "../../core/test/lib/effect"
+import { ServerProcess } from "../src/process"
+
+it.live("waits for plugin initialization before listing models", () =>
+  Effect.acquireUseRelease(
+    Effect.promise(() => tmpdir("opencode-model-endpoint-")),
+    (tmp) =>
+      Effect.gen(function* () {
+        yield* Effect.promise(() =>
+          fs.writeFile(
+            path.join(tmp.path, "opencode.json"),
+            JSON.stringify({
+              providers: {
+                custom: {
+                  package: "aisdk:@ai-sdk/openai-compatible",
+                  settings: { apiKey: "secret" },
+                  models: { chat: {} },
+                },
+              },
+            }),
+          ),
+        )
+        const server = yield* ServerProcess.start<never, never>({
+          hostname: "127.0.0.1",
+          port: 0,
+          password: "secret",
+          app: { version: "test-version" },
+          database: { path: ":memory:" },
+          config: { directory: tmp.path },
+          fs: { filewatcher: false },
+        })
+        const url = new URL("/api/model", HttpServer.formatAddress(server.address))
+        url.searchParams.set("location[directory]", tmp.path)
+        const response = yield* Effect.promise(() =>
+          fetch(url, { headers: { authorization: `Basic ${btoa("opencode:secret")}` } }),
+        )
+
+        expect(response.status).toBe(200)
+        const body: unknown = yield* Effect.promise(() => response.json())
+        if (!isRecord(body) || !Array.isArray(body["data"])) throw new Error("Expected a model list response")
+        expect(
+          body["data"].some((model) => isRecord(model) && model["providerID"] === "custom" && model["id"] === "chat"),
+        ).toBeTrue()
+      }),
+    (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+  ),
+)
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value)
+}

packages/tui/src/component/dialog-config.tsx

@@ -60,15 +60,6 @@ export const settings: Setting[] = [
     labels: ["off", "on"],
     keywords: ["scroll bar"],
   },
-  {
-    title: "Reading width",
-    category: "Session",
-    path: ["session", "max_width"],
-    default: "auto",
-    values: ["auto", 66, 72, 80],
-    labels: ["auto", "66 columns", "72 columns", "80 columns"],
-    keywords: ["transcript", "composer", "centered", "max width", "prose"],
-  },
   {
     title: "Thinking",
     category: "Session",

packages/tui/src/config/index.tsx

@@ -125,11 +125,6 @@ export const Info = Schema.Struct({
         description: "Session sidebar visibility; 'auto' shows it when space permits",
       }),
       scrollbar: Schema.optional(Schema.Boolean).annotate({ description: "Show the session transcript scrollbar" }),
-      max_width: Schema.optional(
-        Schema.Union([Schema.Int.check(Schema.isGreaterThan(4)), Schema.Literal("auto")]),
-      ).annotate({
-        description: "Session prose and composer max width, or 'auto' to use the available width",
-      }),
       thinking: Schema.optional(Schema.Literals(["show", "hide"])).annotate({
         description: "Show or hide model reasoning by default",
       }),

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

@@ -68,7 +68,7 @@ import { errorMessage } from "../../util/error"
 import { useToast } from "../../ui/toast"
 import stripAnsi from "strip-ansi"
 import { usePromptRef } from "../../context/prompt"
-import { sessionLaneLayout, sessionTabsFitVertically, SESSION_SIDEBAR_WIDTH } from "../../ui/layout"
+import { sessionTabsFitVertically, SESSION_SIDEBAR_WIDTH } from "../../ui/layout"
 import { projectedPromptInput } from "../../prompt/codec"
 import { deduplicateVisibleImages } from "../../prompt/attachment"
 import { useEpilogue } from "../../context/epilogue"
@@ -108,13 +108,13 @@ import { createSingleFlight } from "../../util/single-flight"
 import type { SessionPending } from "@opencode-ai/schema/session-pending"
 import { generateThinkingSyntax } from "./thinking-syntax"
 import { createDelayedPresence } from "../../util/delayed-presence"
-import { markdownLaneMarginTop, markdownLanes } from "./markdown-lanes"
 
 addDefaultParsers(parsers.parsers)
 
 // Exclude temporary bottom space when measuring the real transcript height.
 const NAVIGATION_SLACK_ID = "session-navigation-slack"
 const BACKGROUND_TOOL_HINT_DELAY = 1_000
+
 // Tail-first transcript mounting: rows mounted with the session, then backfill cadence.
 // The tail comfortably overfills a tall viewport; backfill drains a 200-message transcript
 // in a few hundred milliseconds without a perceptible pause.
@@ -1084,57 +1084,55 @@ export function Session() {
                 {(height) => <box id={NAVIGATION_SLACK_ID} height={height()} flexShrink={0} />}
               </Show>
             </scrollbox>
-            <SessionContentLane width="readable">
-              <box flexShrink={0}>
-                <Show when={!composer.open && !disabled() && queuedPrompts().length > 0}>
-                  <QueuedPromptDock prompts={queuedPrompts()} onOpen={openQueuedPrompts} />
-                </Show>
-                <PluginSlot name="session.composer.top" input={{ sessionID: route.sessionID }} mode="all" />
-                <Composer
-                  sessionID={route.sessionID}
-                  open={composer.open || (!!session()?.parentID && forms().length === 0)}
-                  defaultTab={composer.tab ?? (session()?.parentID ? "subagents" : undefined)}
-                  onClose={() => setComposer("open", false)}
-                />
-                <Switch>
-                  <Match when={composer.open || (!!session()?.parentID && forms().length === 0)}>{null}</Match>
-                  <Match when={promptedPermissions().length > 0}>
-                    <Show when={promptedPermissions()[0]?.id} keyed>
-                      {(_) => {
-                        const request = promptedPermissions()[0]
-                        return request ? (
-                          <PermissionPrompt request={request} directory={session()?.location.directory} />
-                        ) : null
-                      }}
-                    </Show>
-                  </Match>
-                  <Match when={forms().length > 0}>
-                    <Show when={forms()[0]?.id} keyed>
-                      {(_) => {
-                        const form = forms()[0]
-                        return form ? <FormPrompt form={form} /> : null
-                      }}
-                    </Show>
-                  </Match>
-                  <Match when={!disabled()}>
-                    <Prompt
-                      visible={true}
-                      ref={bind}
-                      disabled={false}
-                      onSubmit={() => {
-                        toBottom()
-                      }}
-                      onEmptySubmit={async () => {
-                        const next = queuedPrompts()[0]
-                        if (!next) return false
-                        return mutatePending("steer", next.id)
-                      }}
-                      sessionID={route.sessionID}
-                    />
-                  </Match>
-                </Switch>
-              </box>
-            </SessionContentLane>
+            <box flexShrink={0}>
+              <Show when={!composer.open && !disabled() && queuedPrompts().length > 0}>
+                <QueuedPromptDock prompts={queuedPrompts()} onOpen={openQueuedPrompts} />
+              </Show>
+              <PluginSlot name="session.composer.top" input={{ sessionID: route.sessionID }} mode="all" />
+              <Composer
+                sessionID={route.sessionID}
+                open={composer.open || (!!session()?.parentID && forms().length === 0)}
+                defaultTab={composer.tab ?? (session()?.parentID ? "subagents" : undefined)}
+                onClose={() => setComposer("open", false)}
+              />
+              <Switch>
+                <Match when={composer.open || (!!session()?.parentID && forms().length === 0)}>{null}</Match>
+                <Match when={promptedPermissions().length > 0}>
+                  <Show when={promptedPermissions()[0]?.id} keyed>
+                    {(_) => {
+                      const request = promptedPermissions()[0]
+                      return request ? (
+                        <PermissionPrompt request={request} directory={session()?.location.directory} />
+                      ) : null
+                    }}
+                  </Show>
+                </Match>
+                <Match when={forms().length > 0}>
+                  <Show when={forms()[0]?.id} keyed>
+                    {(_) => {
+                      const form = forms()[0]
+                      return form ? <FormPrompt form={form} /> : null
+                    }}
+                  </Show>
+                </Match>
+                <Match when={!disabled()}>
+                  <Prompt
+                    visible={true}
+                    ref={bind}
+                    disabled={false}
+                    onSubmit={() => {
+                      toBottom()
+                    }}
+                    onEmptySubmit={async () => {
+                      const next = queuedPrompts()[0]
+                      if (!next) return false
+                      return mutatePending("steer", next.id)
+                    }}
+                    sessionID={route.sessionID}
+                  />
+                </Match>
+              </Switch>
+            </box>
           </Show>
         </box>
         <Show when={sidebarVisible()}>
@@ -1178,30 +1176,22 @@ function SessionRowView(props: SessionRowViewProps) {
           )}
         </Match>
         <Match when={props.row.type === "compaction-queued"}>
-          <SessionContentLane width="readable">
-            <CompactionQueued />
-          </SessionContentLane>
+          <CompactionQueued />
         </Match>
         <Match when={props.row.type === "part" ? props.row : undefined}>
           {(row) => <SessionPartView partRef={row().ref} message={props.message} />}
         </Match>
         <Match when={props.row.type === "group" && props.row.kind === "reasoning" ? props.row : undefined}>
-          {(row) => (
-            <SessionContentLane width="readable">
-              <SessionReasoningGroupView refs={row().refs} completed={row().completed} message={props.message} />
-            </SessionContentLane>
-          )}
+          {(row) => <SessionReasoningGroupView refs={row().refs} completed={row().completed} message={props.message} />}
         </Match>
         <Match when={props.row.type === "group" && props.row.kind === "exploration" ? props.row : undefined}>
           {(row) => (
-            <SessionContentLane width="readable">
-              <SessionGroupView
-                refs={row().refs}
-                pending={row().pending}
-                completed={row().completed}
-                message={props.message}
-              />
-            </SessionContentLane>
+            <SessionGroupView
+              refs={row().refs}
+              pending={row().pending}
+              completed={row().completed}
+              message={props.message}
+            />
           )}
         </Match>
         <Match when={props.row.type === "assistant-footer" ? props.row : undefined}>
@@ -1209,9 +1199,7 @@ function SessionRowView(props: SessionRowViewProps) {
             <Show when={props.message(row().messageID)}>
               {(message) => (
                 <Show when={message().type === "assistant"}>
-                  <SessionContentLane width="readable">
-                    <AssistantFooter message={message() as SessionMessageAssistant} />
-                  </SessionContentLane>
+                  <AssistantFooter message={message() as SessionMessageAssistant} />
                 </Show>
               )}
             </Show>
@@ -1219,13 +1207,7 @@ function SessionRowView(props: SessionRowViewProps) {
         </Match>
         <Match when={props.row.type === "turn-usage" ? props.row : undefined}>
           {(row) => (
-            <SessionContentLane width="technical">
-              <TurnTokenUsage
-                messageIDs={row().messageIDs}
-                previousCache={row().previousCache}
-                message={props.message}
-              />
-            </SessionContentLane>
+            <TurnTokenUsage messageIDs={row().messageIDs} previousCache={row().previousCache} message={props.message} />
           )}
         </Match>
       </Switch>
@@ -1233,42 +1215,6 @@ function SessionRowView(props: SessionRowViewProps) {
   )
 }
 
-function SessionContentLane(props: { children: JSX.Element; width: "readable" | "technical" }) {
-  const ctx = use()
-  const readable = () => ctx.config.session?.max_width ?? "auto"
-  const layout = createMemo(() => {
-    const width = readable()
-    return width === "auto" ? undefined : sessionLaneLayout(ctx.width, width)
-  })
-  return (
-    <Show when={layout()} fallback={props.children}>
-      {(value) => (
-        <box width="100%" paddingLeft={value().inset} flexShrink={0}>
-          <box width={value()[props.width]} flexShrink={0}>
-            {props.children}
-          </box>
-        </box>
-      )}
-    </Show>
-  )
-}
-
-function SessionBreakoutLane(props: { children: JSX.Element }) {
-  const ctx = use()
-  const readable = () => ctx.config.session?.max_width ?? "auto"
-  const inset = createMemo(() => {
-    const width = readable()
-    return width === "auto" ? undefined : sessionLaneLayout(ctx.width, width).inset
-  })
-  return (
-    <Show when={inset() !== undefined} fallback={props.children}>
-      <box width="100%" paddingLeft={inset()} flexShrink={0}>
-        {props.children}
-      </box>
-    </Show>
-  )
-}
-
 function TurnTokenUsage(props: {
   messageIDs: string[]
   previousCache?: CacheUsage
@@ -1431,35 +1377,20 @@ function SessionMessageView(props: { message: SessionMessageInfo }) {
         <UserMessage message={props.message as SessionMessageUser} />
       </Match>
       <Match when={props.message.type === "shell"}>
-        <SessionContentLane width="technical">
-          <ShellMessage message={props.message as Extract<SessionMessageInfo, { type: "shell" }>} />
-        </SessionContentLane>
+        <ShellMessage message={props.message as Extract<SessionMessageInfo, { type: "shell" }>} />
       </Match>
       <Match when={props.message.type === "agent-switched" || props.message.type === "model-switched"}>
-        <SessionContentLane width="readable">
-          <SessionSwitchMessageV2 message={props.message} />
-        </SessionContentLane>
+        <SessionSwitchMessageV2 message={props.message} />
       </Match>
       <Match
         when={props.message.type === "system" || props.message.type === "synthetic" || props.message.type === "skill"}
       >
-        <Show
-          when={props.message.type === "skill"}
-          fallback={
-            <SessionContentLane width="readable">
-              <SessionNoticeMessageV2 message={props.message} />
-            </SessionContentLane>
-          }
-        >
-          <SessionContentLane width="readable">
-            <SessionSkillMessage message={props.message as Extract<SessionMessageInfo, { type: "skill" }>} />
-          </SessionContentLane>
+        <Show when={props.message.type === "skill"} fallback={<SessionNoticeMessageV2 message={props.message} />}>
+          <SessionSkillMessage message={props.message as Extract<SessionMessageInfo, { type: "skill" }>} />
         </Show>
       </Match>
       <Match when={props.message.type === "compaction"}>
-        <SessionContentLane width="readable">
-          <CompactionMessage message={props.message as Extract<SessionMessageInfo, { type: "compaction" }>} />
-        </SessionContentLane>
+        <CompactionMessage message={props.message as Extract<SessionMessageInfo, { type: "compaction" }>} />
       </Match>
     </Switch>
   )
@@ -1480,13 +1411,11 @@ function SessionPartView(props: { partRef: PartRef; message: (messageID: string)
             <TextPart part={item() as SessionMessageAssistantText} last={false} />
           </Match>
           <Match when={item().type === "reasoning"}>
-            <SessionContentLane width="readable">
-              <ReasoningPart
-                part={item() as SessionMessageAssistantReasoning}
-                message={message() as SessionMessageAssistant}
-                last={false}
-              />
-            </SessionContentLane>
+            <ReasoningPart
+              part={item() as SessionMessageAssistantReasoning}
+              message={message() as SessionMessageAssistant}
+              last={false}
+            />
           </Match>
           <Match when={item().type === "tool"}>
             <ToolPart part={item() as SessionMessageAssistantTool} />
@@ -2009,56 +1938,79 @@ function UserMessage(props: { message: SessionMessageUser }) {
 
   return (
     <Show when={props.message.text.trim() || files().length || skills().length}>
-      <SessionContentLane width="readable">
+      <box
+        border={["left"]}
+        borderColor={delivery() ? theme.border.default : color()}
+        customBorderChars={SplitBorder.customBorderChars}
+      >
+        <SessionImages images={images()} paddingLeft={2} />
         <box
-          border={["left"]}
-          borderColor={delivery() ? theme.border.default : color()}
-          customBorderChars={SplitBorder.customBorderChars}
-        >
-          <SessionImages images={images()} paddingLeft={2} />
-          <box
-            onMouseOver={() => {
-              setHover(true)
-            }}
-            onMouseOut={() => {
-              setHover(false)
-            }}
-            onMouseUp={() => {
-              if (renderer.getSelection()?.getSelectedText()) return
-              if (delivery() === "steer") {
-                dialog.replace(() => (
-                  <DialogSelect
-                    title="Pending steer"
-                    options={[
-                      { title: "Move to queue", value: "queue" as const },
-                      { title: "Delete", value: "cancel" as const },
-                    ]}
-                    onSelect={(option) => {
-                      void updatePendingSteer(option.value)
-                    }}
-                  />
-                ))
-                return
-              }
+          onMouseOver={() => {
+            setHover(true)
+          }}
+          onMouseOut={() => {
+            setHover(false)
+          }}
+          onMouseUp={() => {
+            if (renderer.getSelection()?.getSelectedText()) return
+            if (delivery() === "steer") {
               dialog.replace(() => (
-                <DialogMessage
-                  messageID={props.message.id}
-                  sessionID={ctx.sessionID}
-                  setPrompt={(value) => promptRef.current?.set(value)}
+                <DialogSelect
+                  title="Pending steer"
+                  options={[
+                    { title: "Move to queue", value: "queue" as const },
+                    { title: "Delete", value: "cancel" as const },
+                  ]}
+                  onSelect={(option) => {
+                    void updatePendingSteer(option.value)
+                  }}
                 />
               ))
-            }}
-            paddingTop={1}
-            paddingBottom={1}
-            paddingLeft={2}
-            backgroundColor={hover() ? theme.raise(theme.background.default) : theme.background.default}
-            flexShrink={0}
-          >
-            <text fg={theme.text.default}>{props.message.text}</text>
-            <Show when={skills().length}>
-              <box flexDirection="row" paddingTop={1} gap={1} flexWrap="wrap">
-                <For each={skills()}>
-                  {(skill) => (
+              return
+            }
+            dialog.replace(() => (
+              <DialogMessage
+                messageID={props.message.id}
+                sessionID={ctx.sessionID}
+                setPrompt={(value) => promptRef.current?.set(value)}
+              />
+            ))
+          }}
+          paddingTop={1}
+          paddingBottom={1}
+          paddingLeft={2}
+          backgroundColor={hover() ? theme.raise(theme.background.default) : theme.background.default}
+          flexShrink={0}
+        >
+          <text fg={theme.text.default}>{props.message.text}</text>
+          <Show when={skills().length}>
+            <box flexDirection="row" paddingTop={1} gap={1} flexWrap="wrap">
+              <For each={skills()}>
+                {(skill) => (
+                  <text fg={theme.text.default}>
+                    <span
+                      style={{
+                        bg: theme.hue.accent[mode() === "light" ? 700 : 200],
+                        fg: theme.background.default,
+                        bold: true,
+                      }}
+                    >
+                      {" skill "}
+                    </span>
+                    <span style={{ bg: theme.raise(theme.background.default), fg: theme.text.subdued }}>
+                      {` ${skill.name} `}
+                    </span>
+                  </text>
+                )}
+              </For>
+            </box>
+          </Show>
+          <Show when={files().length}>
+            <box flexDirection="row" paddingTop={1} gap={1} flexWrap="wrap">
+              <For each={files()}>
+                {(file) => {
+                  const label = file.mime === "application/x-directory" ? "dir" : "file"
+                  return (
                     <text fg={theme.text.default}>
                       <span
                         style={{
@@ -2067,45 +2019,20 @@ function UserMessage(props: { message: SessionMessageUser }) {
                           bold: true,
                         }}
                       >
-                        {" skill "}
+                        {` ${label} `}
                       </span>
                       <span style={{ bg: theme.raise(theme.background.default), fg: theme.text.subdued }}>
-                        {` ${skill.name} `}
+                        {" "}
+                        {file.name ?? (file.source.type === "uri" ? file.source.uri : "attachment")}{" "}
                       </span>
                     </text>
-                  )}
-                </For>
-              </box>
-            </Show>
-            <Show when={files().length}>
-              <box flexDirection="row" paddingTop={1} gap={1} flexWrap="wrap">
-                <For each={files()}>
-                  {(file) => {
-                    const label = file.mime === "application/x-directory" ? "dir" : "file"
-                    return (
-                      <text fg={theme.text.default}>
-                        <span
-                          style={{
-                            bg: theme.hue.accent[mode() === "light" ? 700 : 200],
-                            fg: theme.background.default,
-                            bold: true,
-                          }}
-                        >
-                          {` ${label} `}
-                        </span>
-                        <span style={{ bg: theme.raise(theme.background.default), fg: theme.text.subdued }}>
-                          {" "}
-                          {file.name ?? (file.source.type === "uri" ? file.source.uri : "attachment")}{" "}
-                        </span>
-                      </text>
-                    )
-                  }}
-                </For>
-              </box>
-            </Show>
-          </box>
+                  )
+                }}
+              </For>
+            </box>
+          </Show>
         </box>
-      </SessionContentLane>
+      </box>
     </Show>
   )
 }
@@ -2288,16 +2215,14 @@ function TextPart(props: { last: boolean; part: SessionMessageAssistantText }) {
   const theme = useTheme()
   const { currentSyntax: syntax } = useThemes()
   const plugins = usePlugin()
-  const constrained = () => (ctx.config.session?.max_width ?? "auto") !== "auto"
-
-  function Content(input: { content: string }) {
-    return (
+  return (
+    <Show when={props.part.text.trim()}>
       <box paddingLeft={3} flexShrink={0}>
         <markdown
           syntaxStyle={syntax()}
           streaming={true}
           internalBlockMode="top-level"
-          content={input.content.trim()}
+          content={props.part.text.trim()}
           tableOptions={{ style: "grid" }}
           conceal={ctx.markdownMode() === "rendered"}
           fg={theme.markdown.text}
@@ -2305,38 +2230,6 @@ function TextPart(props: { last: boolean; part: SessionMessageAssistantText }) {
           renderNode={plugins.markdown()}
         />
       </box>
-    )
-  }
-
-  return (
-    <Show when={props.part.text.trim()}>
-      <Switch>
-        <Match when={!constrained()}>
-          <Content content={props.part.text} />
-        </Match>
-        <Match when={constrained()}>
-          <Index each={markdownLanes(props.part.text.trim())}>
-            {(segment, index) => {
-              const content = <Content content={segment().content} />
-              return (
-                <box width="100%" marginTop={markdownLaneMarginTop(index, segment().width)} flexShrink={0}>
-                  <Switch>
-                    <Match when={segment().width === "full"}>
-                      <SessionBreakoutLane>{content}</SessionBreakoutLane>
-                    </Match>
-                    <Match when={segment().width === "technical"}>
-                      <SessionContentLane width="technical">{content}</SessionContentLane>
-                    </Match>
-                    <Match when={segment().width === "readable"}>
-                      <SessionContentLane width="readable">{content}</SessionContentLane>
-                    </Match>
-                  </Switch>
-                </box>
-              )
-            }}
-          </Index>
-        </Match>
-      </Switch>
     </Show>
   )
 }
@@ -2345,7 +2238,6 @@ function TextPart(props: { last: boolean; part: SessionMessageAssistantText }) {
 
 function ToolPart(props: { part: SessionMessageAssistantTool; images?: boolean }) {
   const display = createMemo(() => toolDisplay(props.part.name))
-  const width = createMemo(() => toolLane(props.part.name))
 
   const toolprops = {
     get metadata() {
@@ -2415,12 +2307,10 @@ function ToolPart(props: { part: SessionMessageAssistantTool; images?: boolean }
     </Switch>
   )
   return [
-    <SessionContentLane width={width()}>{content}</SessionContentLane>,
-    <SessionContentLane width="readable">
-      <Show when={props.images !== false}>
-        <ToolImages parts={[props.part]} />
-      </Show>
-    </SessionContentLane>,
+    content,
+    <Show when={props.images !== false}>
+      <ToolImages parts={[props.part]} />
+    </Show>,
   ]
 }
 
@@ -3254,7 +3144,7 @@ function Edit(props: ToolProps) {
     const diffView = ctx.config.diffs?.view
     if (diffView === "unified") return "unified"
     if (diffView === "split") return "split"
-    if ((ctx.config.session?.max_width ?? "auto") !== "auto") return "unified"
+    // Default to "auto" behavior
     return ctx.width > 120 ? "split" : "unified"
   })
 
@@ -3332,7 +3222,6 @@ function ApplyPatch(props: ToolProps) {
   const view = createMemo(() => {
     if (ctx.config.diffs?.view === "unified") return "unified"
     if (ctx.config.diffs?.view === "split") return "split"
-    if ((ctx.config.session?.max_width ?? "auto") !== "auto") return "unified"
     return ctx.width > 120 ? "split" : "unified"
   })
 
@@ -3518,17 +3407,11 @@ const toolDisplays = new Set([
   "skill",
 ])
 
-const technicalToolDisplays = new Set(["shell", "write", "edit", "execute", "patch", "generic"])
-
 export function toolDisplay(tool: string) {
   const normalized = canonicalToolName(tool)
   return toolDisplays.has(normalized) ? normalized : "generic"
 }
 
-export function toolLane(tool: string): "readable" | "technical" {
-  return technicalToolDisplays.has(toolDisplay(tool)) ? "technical" : "readable"
-}
-
 function recordValue(value: unknown): Record<string, unknown> | undefined {
   if (typeof value !== "object" || value === null || Array.isArray(value)) return
   return value as Record<string, unknown>

packages/tui/src/routes/session/markdown-lanes.ts

@@ -1,65 +0,0 @@
-export type MarkdownLane = {
-  content: string
-  width: "readable" | "technical" | "full"
-}
-
-export function markdownLanes(content: string): MarkdownLane[] {
-  const result: MarkdownLane[] = []
-  let fence: { marker: "`" | "~"; length: number } | undefined
-  let table = false
-  const lines = content.match(/[^\n]*(?:\n|$)/g)?.filter(Boolean) ?? []
-
-  for (const [index, line] of lines.entries()) {
-    const opening = fence ? undefined : line.match(/^ {0,3}(`{3,}|~{3,})([^\n]*)/)
-    const marker = opening?.[1]
-    const tableOpening = !opening && !fence && isTableRow(line) && isTableDelimiter(lines[index + 1])
-    if (marker) fence = { marker: marker.startsWith("`") ? "`" : "~", length: marker.length }
-    if (tableOpening) table = true
-
-    const width = opening
-      ? opening[2]?.trim().split(/\s/, 1)[0]?.toLowerCase() === "mermaid"
-        ? "full"
-        : "technical"
-      : fence
-        ? (result.at(-1)?.width ?? "technical")
-        : table
-          ? "technical"
-          : "readable"
-    const previous = result.at(-1)
-    if (previous?.width === width) previous.content += line
-    else result.push({ content: line, width })
-
-    if (!fence) {
-      if (table && !isTableRow(lines[index + 1])) table = false
-      continue
-    }
-    const currentFence = fence
-    const trimmed = line.trim()
-    if (
-      !opening &&
-      (line.match(/^ */)?.[0].length ?? 0) <= 3 &&
-      trimmed.length >= currentFence.length &&
-      [...trimmed].every((character) => character === currentFence.marker)
-    ) {
-      fence = undefined
-    }
-  }
-
-  return result
-}
-
-function isTableRow(line: string | undefined) {
-  return Boolean(line?.trim() && line.includes("|"))
-}
-
-function isTableDelimiter(line: string | undefined) {
-  if (!line) return false
-  const value = line.trim().replace(/^\||\|$/g, "")
-  const cells = value.split("|")
-  return cells.length > 1 && cells.every((cell) => /^:?-{3,}:?$/.test(cell.trim()))
-}
-
-export function markdownLaneMarginTop(index: number, width: MarkdownLane["width"]) {
-  if (index === 0 || width === "full") return 0
-  return 1
-}

packages/tui/src/ui/layout.ts

@@ -1,19 +1,6 @@
 export const SESSION_SIDEBAR_WIDTH = 42
-export const SESSION_TECHNICAL_LANE_WIDTH = 88
 const SESSION_CONTENT_MIN_WIDTH = 44
 
 export function sessionTabsFitVertically(total: number) {
   return total >= SESSION_SIDEBAR_WIDTH + SESSION_CONTENT_MIN_WIDTH
 }
-
-// The shared spine centers the prose measure; the technical rail shares its
-// leading edge and extends rightward, clamped so it still fits the canvas.
-export function sessionLaneLayout(available: number, readable: number) {
-  const technical = Math.min(available, Math.max(readable, SESSION_TECHNICAL_LANE_WIDTH))
-  const centered = Math.floor((available - Math.min(readable, technical)) / 2)
-  return {
-    inset: Math.max(0, Math.min(centered, available - technical)),
-    readable: Math.min(readable, technical),
-    technical,
-  }
-}

packages/tui/test/cli/tui/inline-tool-wrap-snapshot.test.tsx

@@ -10,7 +10,6 @@ import {
   parseQuestionAnswers,
   parseQuestions,
   toolDisplay,
-  toolLane,
 } from "../../../src/routes/session"
 
 let testSetup: Awaited<ReturnType<typeof testRender>> | undefined
@@ -132,11 +131,6 @@ describe("TUI inline tool wrapping", () => {
     expect(toolDisplay("apply_patch")).toBe("patch")
     expect(toolDisplay("patch")).toBe("patch")
     expect(toolDisplay("plugin_tool")).toBe("generic")
-    expect(toolLane("glob")).toBe("readable")
-    expect(toolLane("webfetch")).toBe("readable")
-    expect(toolLane("shell")).toBe("technical")
-    expect(toolLane("apply_patch")).toBe("technical")
-    expect(toolLane("plugin_tool")).toBe("technical")
   })
 
   test("replaces pending copy when a tool fails before completion", async () => {

packages/tui/test/cli/tui/markdown-lanes.test.ts

@@ -1,68 +0,0 @@
-import { expect, test } from "bun:test"
-import { markdownLaneMarginTop, markdownLanes } from "../../../src/routes/session/markdown-lanes"
-
-test("keeps prose in the readable lane", () => {
-  expect(markdownLanes("Before\n\nAfter")).toEqual([{ content: "Before\n\nAfter", width: "readable" }])
-})
-
-test("moves Mermaid fences into the full lane", () => {
-  expect(
-    markdownLanes(`Before
-
-\`\`\`mermaid
-flowchart LR
-  A --> B
-\`\`\`
-
-After`),
-  ).toEqual([
-    { content: "Before\n\n", width: "readable" },
-    { content: "```mermaid\nflowchart LR\n  A --> B\n```\n", width: "full" },
-    { content: "\nAfter", width: "readable" },
-  ])
-})
-
-test("keeps an incomplete streaming Mermaid fence full width", () => {
-  expect(markdownLanes("Before\n```mermaid\nflowchart LR\n  A -->")).toEqual([
-    { content: "Before\n", width: "readable" },
-    { content: "```mermaid\nflowchart LR\n  A -->", width: "full" },
-  ])
-})
-
-test("supports tilde fences and longer closing fences", () => {
-  expect(markdownLanes("~~~ts\nconst value = 1\n~~~~\nAfter")).toEqual([
-    { content: "~~~ts\nconst value = 1\n~~~~\n", width: "technical" },
-    { content: "After", width: "readable" },
-  ])
-})
-
-test("does not close a fence indented as code", () => {
-  expect(markdownLanes("```ts\n    ```\nstill code")).toEqual([
-    { content: "```ts\n    ```\nstill code", width: "technical" },
-  ])
-})
-
-test("gives ordinary fenced code an intermediate lane", () => {
-  expect(markdownLanes("```ts\nexport const value = true\n```")).toEqual([
-    { content: "```ts\nexport const value = true\n```", width: "technical" },
-  ])
-})
-
-test("gives Markdown tables the technical lane", () => {
-  expect(markdownLanes("Before\n\n| Name | Value |\n| --- | ---: |\n| Width | 88 |\n\nAfter")).toEqual([
-    { content: "Before\n\n", width: "readable" },
-    { content: "| Name | Value |\n| --- | ---: |\n| Width | 88 |\n", width: "technical" },
-    { content: "\nAfter", width: "readable" },
-  ])
-})
-
-test("does not treat ordinary pipe characters as a table", () => {
-  expect(markdownLanes("Use foo | bar in prose.")).toEqual([{ content: "Use foo | bar in prose.", width: "readable" }])
-})
-
-test("restores spacing between separately rendered blocks", () => {
-  expect(markdownLaneMarginTop(0, "readable")).toBe(0)
-  expect(markdownLaneMarginTop(1, "technical")).toBe(1)
-  expect(markdownLaneMarginTop(2, "readable")).toBe(1)
-  expect(markdownLaneMarginTop(1, "full")).toBe(0)
-})

packages/tui/test/config-v2.test.tsx

@@ -27,15 +27,6 @@ test("validates the session tabs setting", () => {
   expect(decode({ session: { image_preview: true } })).toEqual({ session: { image_preview: true } })
 })
 
-test("validates the session max width setting", () => {
-  const decode = Schema.decodeUnknownSync(Info)
-
-  expect(decode({ session: { max_width: "auto" } })).toEqual({ session: { max_width: "auto" } })
-  expect(decode({ session: { max_width: 100 } })).toEqual({ session: { max_width: 100 } })
-  expect(() => decode({ session: { max_width: 4 } })).toThrow()
-  expect(() => decode({ session: { max_width: 100.5 } })).toThrow()
-})
-
 test("resolves nested config and keybind defaults", () => {
   const config = resolve(
     {
@@ -62,13 +53,6 @@ test("shows resolved tab defaults in settings", () => {
   expect(settings.find((setting) => setting.path.join(".") === "tabs.layout")?.default).toBe("horizontal")
 })
 
-test("shows session reading width presets in settings", () => {
-  const setting = settings.find((setting) => setting.path.join(".") === "session.max_width")
-
-  expect(setting?.default).toBe("auto")
-  expect(setting?.values).toEqual(["auto", 66, 72, 80])
-})
-
 test("provides config and its host interface", async () => {
   const config = resolve({}, { terminalSuspend: true })
   let current = {}

packages/tui/test/ui/layout.test.ts

@@ -1,23 +1,8 @@
 import { expect, test } from "bun:test"
-import {
-  sessionLaneLayout,
-  sessionTabsFitVertically,
-  SESSION_SIDEBAR_WIDTH,
-  SESSION_TECHNICAL_LANE_WIDTH,
-} from "../../src/ui/layout"
+import { sessionTabsFitVertically, SESSION_SIDEBAR_WIDTH } from "../../src/ui/layout"
 
 test("vertical tabs match the session sidebar and preserve compact content width", () => {
   expect(SESSION_SIDEBAR_WIDTH).toBe(42)
   expect(sessionTabsFitVertically(86)).toBe(true)
   expect(sessionTabsFitVertically(85)).toBe(false)
 })
-
-test("session lanes center the prose measure on one leading edge", () => {
-  expect(SESSION_TECHNICAL_LANE_WIDTH).toBe(88)
-  // Wide canvas: prose is truly centered, technical extends rightward.
-  expect(sessionLaneLayout(156, 66)).toEqual({ inset: 45, readable: 66, technical: 88 })
-  // Centering the prose would push the technical rail past the canvas; clamp.
-  expect(sessionLaneLayout(100, 66)).toEqual({ inset: 12, readable: 66, technical: 88 })
-  expect(sessionLaneLayout(80, 66)).toEqual({ inset: 0, readable: 66, technical: 80 })
-  expect(sessionLaneLayout(60, 66)).toEqual({ inset: 0, readable: 60, technical: 60 })
-})

packages/www/openapi.json

@@ -14373,6 +14373,9 @@
               },
               "agent": {
                 "type": "string"
+              },
+              "previous": {
+                "type": "string"
               }
             },
             "required": ["sessionID", "agent"],
@@ -14441,6 +14444,9 @@
               },
               "model": {
                 "$ref": "#/components/schemas/Model.Ref"
+              },
+              "previous": {
+                "$ref": "#/components/schemas/Model.Ref"
               }
             },
             "required": ["sessionID", "model"],

packages/www/public/openapi.json

@@ -14373,6 +14373,9 @@
               },
               "agent": {
                 "type": "string"
+              },
+              "previous": {
+                "type": "string"
               }
             },
             "required": ["sessionID", "agent"],
@@ -14441,6 +14444,9 @@
               },
               "model": {
                 "$ref": "#/components/schemas/Model.Ref"
+              },
+              "previous": {
+                "$ref": "#/components/schemas/Model.Ref"
               }
             },
             "required": ["sessionID", "model"],