refactor(core): remove unused agent default method

packages/app/src/context/command.tsx

@@ -248,11 +248,6 @@ export function formatKeybind(config: string, t?: (key: KeyLabel) => string): st
   return IS_MAC ? parts.join("") : parts.join("+")
 }
 
-// KeybindV2 takes an array instead of a string
-export function formatKeybindKeys(config: string, t?: (key: KeyLabel) => string): string[] {
-  return formatKeybindParts(config, t)
-}
-
 function isEditableTarget(target: EventTarget | null) {
   if (!(target instanceof HTMLElement)) return false
   if (target.isContentEditable) return true

packages/app/src/context/file.tsx

@@ -286,13 +286,6 @@ export const { use: useFile, provider: FileProvider } = createSimpleContext({
         children: tree.children,
         expand: tree.expandDir,
         collapse: tree.collapseDir,
-        toggle(input: string) {
-          if (tree.dirState(input)?.expanded) {
-            tree.collapseDir(input)
-            return
-          }
-          tree.expandDir(input)
-        },
       },
       get,
       load,

packages/app/src/context/global-sync/utils.ts

@@ -153,18 +153,6 @@ export function normalizeProviderList(
   }
 }
 
-export function sanitizeProject(project: Project) {
-  if (!project.icon?.url && !project.icon?.override) return project
-  return {
-    ...project,
-    icon: {
-      ...project.icon,
-      url: undefined,
-      override: undefined,
-    },
-  }
-}
-
 export function normalizeProjectInfo(project: Project | CurrentProject): Project {
   return {
     ...project,

packages/app/src/context/layout.tsx

@@ -753,9 +753,6 @@ export const { use: useLayout, provider: LayoutProvider } = createSimpleContext(
       },
       mobileSidebar: {
         opened: createMemo(() => store.mobileSidebar?.opened ?? false),
-        show() {
-          setStore("mobileSidebar", "opened", true)
-        },
         hide() {
           setStore("mobileSidebar", "opened", false)
         },
@@ -961,33 +958,6 @@ export const { use: useLayout, provider: LayoutProvider } = createSimpleContext(
               if (current.reviewOpen.includes(path)) return
               setStore("sessionView", session, "reviewOpen", current.reviewOpen.length, path)
             },
-            closePath(path: string) {
-              const session = key()
-              const current = store.sessionView[session]?.reviewOpen
-              if (!current) return
-
-              const index = current.indexOf(path)
-              if (index === -1) return
-              setStore(
-                "sessionView",
-                session,
-                "reviewOpen",
-                produce((draft) => {
-                  if (!draft) return
-                  draft.splice(index, 1)
-                }),
-              )
-            },
-            togglePath(path: string) {
-              const session = key()
-              const current = store.sessionView[session]?.reviewOpen
-              if (!current || !current.includes(path)) {
-                this.openPath(path)
-                return
-              }
-
-              this.closePath(path)
-            },
           },
         }
       },

packages/app/src/pages/session/helpers.ts

@@ -22,8 +22,6 @@ type TabsInput = {
   fileBrowser?: Accessor<boolean>
 }
 
-export const getSessionKey = (dir: string | undefined, id: string | undefined) => `${dir ?? ""}${id ? `/${id}` : ""}`
-
 export function shouldShowFileTree(input: { visible: boolean; opened: boolean }) {
   return input.opened && input.visible
 }

packages/cli/src/acp/event.ts

@@ -1,4 +1,4 @@
-import type { AgentSideConnection, PromptResponse } from "@agentclientprotocol/sdk"
+import type { AgentSideConnection, PromptResponse, SessionUpdate } from "@agentclientprotocol/sdk"
 import type {
   EventSubscribeOutput,
   OpenCodeClient,
@@ -37,6 +37,34 @@ export type TurnStart =
   | { readonly type: "skill"; readonly id: string }
   | { readonly type: "compaction"; readonly id: string }
 
+export const ChildSessionUpdatesCapability = "opencode/child-session-updates"
+export const ChildSessionUpdateMethod = "opencode/session/child_update"
+
+type ChildSessionUpdateBase = {
+  readonly rootSessionId: string
+  readonly childSessionId: string
+  readonly parentSessionId: string
+  readonly depth: number
+  readonly title?: string
+}
+
+type ChildSessionEvent =
+  | { readonly type: "update"; readonly update: SessionUpdate }
+  | {
+      readonly type: "status"
+      readonly status: "created" | "running" | "completed" | "failed" | "interrupted"
+      readonly error?: { readonly type: string; readonly message: string }
+    }
+
+export type ChildSessionUpdate = ChildSessionUpdateBase & ChildSessionEvent
+
+type ChildSession = {
+  readonly id: string
+  readonly parentID: string
+  readonly depth: number
+  readonly title?: string
+}
+
 function emptyToolState(): ToolState {
   return { name: "tool", input: {}, metadata: {}, content: [] }
 }
@@ -50,8 +78,13 @@ export async function streamTurn(input: {
   readonly writeTextFile: boolean
   readonly submit: (signal: AbortSignal) => Promise<unknown>
   readonly control: TurnControl
+  readonly childSessionUpdate?: (update: ChildSessionUpdate) => Promise<void>
+  readonly connectionSignal?: AbortSignal
+  readonly sessionSignal?: AbortSignal
 }): Promise<PromptResponse> {
   const streamController = new AbortController()
+  const connectionAbort = () => streamController.abort()
+  input.connectionSignal?.addEventListener("abort", connectionAbort, { once: true })
   const stream = input.client.event.subscribe({ signal: streamController.signal })[Symbol.asyncIterator]()
   const connected = await stream.next()
   if (connected.done) throw new Error("event stream disconnected before prompt admission")
@@ -62,47 +95,101 @@ export async function streamTurn(input: {
   let finish: SessionMessageAssistant["finish"]
   let executionError: { readonly type: string; readonly message: string } | undefined
   const tools = new Map<string, ToolState>()
+  const children = new Map<string, ChildSession>()
+  const openChildren = new Set<string>()
+  let handedOff = false
 
-  const update = (value: Parameters<Connection["sessionUpdate"]>[0]["update"]) =>
-    input.connection.sessionUpdate({ sessionId: input.sessionID, update: value })
+  const notifyChild = async (child: ChildSession, value: ChildSessionEvent) => {
+    if (!input.childSessionUpdate) return
+    await input
+      .childSessionUpdate({
+        rootSessionId: input.sessionID,
+        childSessionId: child.id,
+        parentSessionId: child.parentID,
+        depth: child.depth,
+        ...(child.title ? { title: child.title } : {}),
+        ...value,
+      })
+      .catch(() => {})
+  }
 
-  const consume = async () => {
+  const updateSession = async (value: SessionUpdate, child: ChildSession | undefined, mode: "turn" | "background") => {
+    const projected = child ? projectChildUpdate(value, child) : value
+    if (mode === "turn" && (!child || !input.childSessionUpdate)) {
+      await input.connection.sessionUpdate({ sessionId: input.sessionID, update: projected })
+    }
+    if (child) await notifyChild(child, { type: "update", update: projected })
+  }
+
+  const consume = async (mode: "turn" | "background") => {
     while (!streamController.signal.aborted) {
       const next = await stream.next()
       if (next.done) throw new Error("event stream disconnected during prompt execution")
       const event = next.value
-      if (event.type === "permission.asked" && event.data.sessionID === input.sessionID) {
-        const tool = event.data.source?.id ? tools.get(event.data.source.id) : undefined
+      if (event.type === "session.created") {
+        const parentID = event.data.info.parentID
+        if (!parentID) continue
+        const parent = parentID === input.sessionID ? undefined : children.get(parentID)
+        if ((mode === "turn" && parentID === input.sessionID) || parent) {
+          const child = {
+            id: event.data.sessionID,
+            parentID,
+            depth: parent ? parent.depth + 1 : 1,
+            title: event.data.info.title,
+          }
+          children.set(child.id, child)
+          openChildren.add(child.id)
+          await notifyChild(child, { type: "status", status: "created" })
+        }
+        continue
+      }
+
+      const eventSessionID = sessionIDFromEvent(event)
+      const child = eventSessionID ? children.get(eventSessionID) : undefined
+      const send = (update: SessionUpdate) => updateSession(update, child, mode)
+      if (mode === "background" && !child) continue
+
+      if (event.type === "permission.asked" && (event.data.sessionID === input.sessionID || child)) {
+        const tool = event.data.source?.id ? tools.get(toolKey(event.data.sessionID, event.data.source.id)) : undefined
         await replyPermission({
           client: input.client,
           connection: input.connection,
           event,
-          sessionID: input.sessionID,
+          sessionID: event.data.sessionID,
+          clientSessionID: input.sessionID,
           cwd: input.cwd,
           tool,
+          ...(child ? { toolCallPrefix: child.id, titlePrefix: child.title } : {}),
         })
         continue
       }
-      if (event.type === "form.created" && event.data.form.sessionID === input.sessionID) {
+      if (event.type === "form.created" && (event.data.form.sessionID === input.sessionID || child)) {
         await input.client.form
-          .cancel({ sessionID: input.sessionID, formID: event.data.form.id })
-          .catch(() => input.client.session.interrupt({ sessionID: input.sessionID }).catch(() => {}))
+          .cancel({ sessionID: event.data.form.sessionID, formID: event.data.form.id })
+          .catch(() => input.client.session.interrupt({ sessionID: event.data.form.sessionID }).catch(() => {}))
         continue
       }
-      if (!("sessionID" in event.data) || event.data.sessionID !== input.sessionID) continue
+      if (!eventSessionID || (eventSessionID !== input.sessionID && !child)) continue
       if (matchesStart(event, input.start)) {
         started = true
         continue
       }
       if (!started) continue
 
+      if (event.type === "session.execution.started") {
+        if (child) {
+          await notifyChild(child, { type: "status", status: "running" })
+        }
+        continue
+      }
+
       if (event.type === "session.step.started") {
-        assistantMessageID = event.data.assistantMessageID
+        if (!child) assistantMessageID = event.data.assistantMessageID
         continue
       }
       if (event.type === "session.text.delta") {
-        assistantMessageID = event.data.assistantMessageID
-        await update({
+        if (!child) assistantMessageID = event.data.assistantMessageID
+        await send({
           sessionUpdate: "agent_message_chunk",
           messageId: event.data.assistantMessageID,
           content: { type: "text", text: event.data.delta },
@@ -110,8 +197,8 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.reasoning.delta") {
-        assistantMessageID = event.data.assistantMessageID
-        await update({
+        if (!child) assistantMessageID = event.data.assistantMessageID
+        await send({
           sessionUpdate: "agent_thought_chunk",
           messageId: event.data.assistantMessageID,
           content: { type: "text", text: event.data.delta },
@@ -119,9 +206,14 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.tool.input.started") {
-        assistantMessageID = event.data.assistantMessageID
-        tools.set(event.data.id, { name: event.data.name, input: {}, metadata: {}, content: [] })
-        await update({
+        if (!child) assistantMessageID = event.data.assistantMessageID
+        tools.set(toolKey(event.data.sessionID, event.data.id), {
+          name: event.data.name,
+          input: {},
+          metadata: {},
+          content: [],
+        })
+        await send({
           sessionUpdate: "tool_call",
           ...pendingToolCall({
             toolCallId: event.data.id,
@@ -133,11 +225,12 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.tool.called") {
-        assistantMessageID = event.data.assistantMessageID
-        const current = tools.get(event.data.id) ?? emptyToolState()
+        if (!child) assistantMessageID = event.data.assistantMessageID
+        const key = toolKey(event.data.sessionID, event.data.id)
+        const current = tools.get(key) ?? emptyToolState()
         current.input = event.data.input
-        tools.set(event.data.id, current)
-        await update({
+        tools.set(key, current)
+        await send({
           sessionUpdate: "tool_call_update",
           ...runningToolUpdate({
             toolCallId: event.data.id,
@@ -149,10 +242,10 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.tool.progress") {
-        const current = tools.get(event.data.id)
+        const current = tools.get(toolKey(event.data.sessionID, event.data.id))
         if (!current) continue
         current.metadata = event.data.metadata
-        await update({
+        await send({
           sessionUpdate: "tool_call_update",
           ...runningToolUpdate({
             toolCallId: event.data.id,
@@ -164,8 +257,9 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.tool.success") {
-        const current = tools.get(event.data.id) ?? emptyToolState()
-        tools.delete(event.data.id)
+        const key = toolKey(event.data.sessionID, event.data.id)
+        const current = tools.get(key) ?? emptyToolState()
+        tools.delete(key)
         await syncEditedFiles({
           connection: input.connection,
           writeTextFile: input.writeTextFile,
@@ -175,7 +269,7 @@ export async function streamTurn(input: {
           toolInput: current.input,
           metadata: event.data.metadata ?? {},
         }).catch(() => {})
-        await update({
+        await send({
           sessionUpdate: "tool_call_update",
           ...completedToolUpdate({
             toolCallId: event.data.id,
@@ -188,9 +282,10 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.tool.failed") {
-        const current = tools.get(event.data.id) ?? emptyToolState()
-        tools.delete(event.data.id)
-        await update({
+        const key = toolKey(event.data.sessionID, event.data.id)
+        const current = tools.get(key) ?? emptyToolState()
+        tools.delete(key)
+        await send({
           sessionUpdate: "tool_call_update",
           ...errorToolUpdate({
             toolCallId: event.data.id,
@@ -205,13 +300,33 @@ export async function streamTurn(input: {
         continue
       }
       if (event.type === "session.step.ended") {
-        assistantMessageID = event.data.assistantMessageID
-        finish = event.data.finish
+        if (!child) {
+          assistantMessageID = event.data.assistantMessageID
+          finish = event.data.finish
+        }
+        continue
+      }
+      if (event.type === "session.execution.succeeded") {
+        if (!child) return "succeeded" as const
+        openChildren.delete(child.id)
+        await notifyChild(child, { type: "status", status: "completed" })
+        if (mode === "background" && openChildren.size === 0) return "succeeded" as const
+        continue
+      }
+      if (event.type === "session.execution.interrupted") {
+        if (!child) return "interrupted" as const
+        openChildren.delete(child.id)
+        await notifyChild(child, { type: "status", status: "interrupted" })
+        if (mode === "background" && openChildren.size === 0) return "interrupted" as const
         continue
       }
-      if (event.type === "session.execution.succeeded") return "succeeded" as const
-      if (event.type === "session.execution.interrupted") return "interrupted" as const
       if (event.type === "session.execution.failed") {
+        if (child) {
+          openChildren.delete(child.id)
+          await notifyChild(child, { type: "status", status: "failed", error: event.data.error })
+          if (mode === "background" && openChildren.size === 0) return "failed" as const
+          continue
+        }
         executionError = event.data.error
         return "failed" as const
       }
@@ -219,7 +334,13 @@ export async function streamTurn(input: {
     return "interrupted" as const
   }
 
-  const completed = consume()
+  const completed = consume("turn")
+  const closeStream = async () => {
+    streamController.abort()
+    input.connectionSignal?.removeEventListener("abort", connectionAbort)
+    input.sessionSignal?.removeEventListener("abort", connectionAbort)
+    await stream.return?.(undefined).catch(() => {})
+  }
   try {
     await input.submit(control.admission.signal).catch((error) => {
       if (!control.cancelled) throw error
@@ -233,6 +354,13 @@ export async function streamTurn(input: {
       }
     }
     const terminal = await completed
+    if (input.childSessionUpdate && openChildren.size > 0 && !input.sessionSignal?.aborted) {
+      handedOff = true
+      input.sessionSignal?.addEventListener("abort", connectionAbort, { once: true })
+      void consume("background")
+        .catch(() => {})
+        .finally(closeStream)
+    }
     const assistant = assistantMessageID
       ? await input.client.session
           .message({ sessionID: input.sessionID, messageID: assistantMessageID })
@@ -250,11 +378,38 @@ export async function streamTurn(input: {
     await completed.catch(() => {})
     throw error
   } finally {
-    streamController.abort()
-    await stream.return?.(undefined).catch(() => {})
+    if (!handedOff) await closeStream()
   }
 }
 
+function sessionIDFromEvent(event: EventSubscribeOutput) {
+  if ("sessionID" in event.data && typeof event.data.sessionID === "string") return event.data.sessionID
+  if (event.type === "form.created") return event.data.form.sessionID
+  return undefined
+}
+
+function toolKey(sessionID: string, id: string) {
+  return `${sessionID}:${id}`
+}
+
+function projectChildUpdate(update: SessionUpdate, child: ChildSession) {
+  const projected = { ...update }
+  projected._meta = {
+    ...projected._meta,
+    "opencode/child-session": {
+      id: child.id,
+      parentID: child.parentID,
+      depth: child.depth,
+      ...(child.title ? { title: child.title } : {}),
+    },
+  }
+  if (projected.sessionUpdate === "tool_call" || projected.sessionUpdate === "tool_call_update") {
+    projected.toolCallId = `${child.id}:${projected.toolCallId}`
+    if (projected.title && child.title) projected.title = `${child.title}: ${projected.title}`
+  }
+  return projected
+}
+
 export async function replayMessages(
   connection: Pick<AgentSideConnection, "sessionUpdate">,
   sessionID: string,

packages/cli/src/acp/permission.ts

@@ -20,20 +20,28 @@ export async function replyPermission(input: {
   readonly connection: Connection
   readonly event: PermissionEvent
   readonly sessionID: string
+  readonly clientSessionID?: string
   readonly cwd: string
   readonly tool?: Tool
+  readonly toolCallPrefix?: string
+  readonly titlePrefix?: string
 }) {
   const toolName = input.tool?.name ?? input.event.data.action
   const toolInput = { ...input.event.data.metadata, ...input.tool?.input }
   const previews = await permissionPreviews(toolName, toolInput, input.cwd)
+  const toolCallID = input.event.data.source?.id ?? input.event.data.id
+  const title = permissionTitle(toolName, toolInput, previews)
   const result = await input.connection
     .requestPermission({
-      sessionId: input.sessionID,
+      sessionId: input.clientSessionID ?? input.sessionID,
       toolCall: {
         ...pendingToolCall({
-          toolCallId: input.event.data.source?.id ?? input.event.data.id,
+          toolCallId: input.toolCallPrefix ? `${input.toolCallPrefix}:${toolCallID}` : toolCallID,
           toolName,
-          state: { input: toolInput, title: permissionTitle(toolName, toolInput, previews) },
+          state: {
+            input: toolInput,
+            title: prefixedTitle(input.titlePrefix, title),
+          },
           cwd: input.cwd,
         }),
         locations: permissionLocations(toolName, toolInput, input.event.data.resources, input.cwd, previews),
@@ -51,6 +59,12 @@ export async function replyPermission(input: {
   })
 }
 
+function prefixedTitle(prefix: string | undefined, title: string | undefined) {
+  if (!prefix) return title
+  if (!title) return prefix
+  return `${prefix}: ${title}`
+}
+
 export async function syncEditedFiles(input: {
   readonly connection: Partial<Pick<AgentSideConnection, "writeTextFile">>
   readonly writeTextFile: boolean

packages/cli/src/acp/service.ts

@@ -43,13 +43,21 @@ import { OPENCODE_VERSION } from "../version"
 import { SessionMessage } from "@opencode-ai/schema/session-message"
 import { buildConfigOptions, parseModelSelection, type ConfigOptionProvider } from "./config-option"
 import { promptContentToParts } from "./content"
-import { replayMessages, streamTurn, type TurnControl, type TurnStart } from "./event"
+import {
+  ChildSessionUpdateMethod,
+  ChildSessionUpdatesCapability,
+  replayMessages,
+  streamTurn,
+  type ChildSessionUpdate,
+  type TurnControl,
+  type TurnStart,
+} from "./event"
 import { ACPError } from "./error"
 
 export const AuthMethodID = "opencode-login"
 
 type Connection = Pick<AgentSideConnection, "sessionUpdate" | "requestPermission"> &
-  Partial<Pick<AgentSideConnection, "writeTextFile">>
+  Partial<Pick<AgentSideConnection, "writeTextFile" | "extNotification" | "signal">>
 
 type Catalog = {
   readonly providers: ConfigOptionProvider[]
@@ -64,6 +72,7 @@ type Catalog = {
 type Attached = {
   readonly id: string
   readonly cwd: string
+  readonly abort: AbortController
   catalog: Catalog
   model: ModelRef
   modeID: string
@@ -100,7 +109,7 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
   const catalogs = new Map<string, Promise<Catalog>>()
   const registeredMcp = new Map<string, Set<string>>()
   const active = new Map<string, TurnControl>()
-  const capabilities = { writeTextFile: false }
+  const capabilities = { writeTextFile: false, childSessionUpdates: false }
 
   const catalog = (cwd: string) => {
     const cached = catalogs.get(cwd)
@@ -119,11 +128,19 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
     throw new ACPError.SessionNotFoundError({ sessionId: sessionID })
   }
 
+  const detach = (sessionID: string) => {
+    sessions.get(sessionID)?.abort.abort()
+    sessions.delete(sessionID)
+    registeredMcp.delete(sessionID)
+  }
+
   const attach = async (session: SessionInfo, cwd: string, mcpServers: readonly McpServer[]) => {
     const currentCatalog = await catalog(cwd)
+    sessions.get(session.id)?.abort.abort()
     const state: Attached = {
       id: session.id,
       cwd,
+      abort: new AbortController(),
       catalog: currentCatalog,
       model: session.model ?? currentCatalog.defaultModel,
       modeID: session.agent ?? currentCatalog.defaultModeID,
@@ -161,6 +178,7 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
   return {
     initialize: async (params) => {
       capabilities.writeTextFile = params.clientCapabilities?.fs?.writeTextFile === true
+      capabilities.childSessionUpdates = params.clientCapabilities?._meta?.[ChildSessionUpdatesCapability] === true
       const authMethod: AuthMethod = {
         description: "Run `opencode auth login` in the terminal",
         name: "Login with opencode",
@@ -178,6 +196,7 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
           mcpCapabilities: { http: true, sse: false },
           promptCapabilities: { embeddedContext: true, image: true },
           sessionCapabilities: { close: {}, delete: {}, fork: {}, list: {}, resume: {} },
+          _meta: { [ChildSessionUpdatesCapability]: true },
         },
         authMethods: [authMethod],
         agentInfo: { name: "OpenCode", version: OPENCODE_VERSION },
@@ -224,8 +243,7 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
       await input.client.session.remove({ sessionID: params.sessionId }).catch((error) => {
         if (!isSessionNotFoundError(error)) throw error
       })
-      sessions.delete(params.sessionId)
-      registeredMcp.delete(params.sessionId)
+      detach(params.sessionId)
       return {}
     },
     resumeSession: async (params) => {
@@ -234,8 +252,7 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
       return { configOptions: configOptions(state) }
     },
     closeSession: async (params) => {
-      sessions.delete(params.sessionId)
-      registeredMcp.delete(params.sessionId)
+      detach(params.sessionId)
       const turn = active.get(params.sessionId)
       if (turn) {
         turn.cancelled = true
@@ -296,6 +313,11 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
       const messageID = SessionMessage.ID.create()
       const prepared = preparePrompt(state.catalog, params.prompt, messageID)
       const control: TurnControl = { cancelled: false, admission: new AbortController() }
+      const extNotification = input.connection.extNotification
+      const childSessionUpdate =
+        capabilities.childSessionUpdates && extNotification
+          ? (update: ChildSessionUpdate) => extNotification(ChildSessionUpdateMethod, update).then(() => {})
+          : undefined
       active.set(state.id, control)
       const response = await streamTurn({
         client: input.client,
@@ -305,7 +327,10 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
         start: prepared.start,
         writeTextFile: capabilities.writeTextFile,
         control,
+        connectionSignal: input.connection.signal,
+        sessionSignal: state.abort.signal,
         submit: (signal) => submitPrompt(input.client, state, prepared, signal),
+        ...(childSessionUpdate ? { childSessionUpdate } : {}),
       }).finally(() => {
         if (active.get(state.id) === control) active.delete(state.id)
       })

packages/cli/test/acp/event-behavior.test.ts

@@ -2,7 +2,7 @@ import { describe, expect, test } from "bun:test"
 import type { AgentSideConnection } from "@agentclientprotocol/sdk"
 import type { SessionMessageInfo } from "@opencode-ai/client/promise"
 import { resolve } from "node:path"
-import { replayMessages, streamTurn, type TurnControl } from "../../src/acp/event"
+import { replayMessages, streamTurn, type ChildSessionUpdate, type TurnControl } from "../../src/acp/event"
 import { createSseFixture, durableEvent, ephemeralEvent, withTimeout } from "./sse-fixture"
 
 type SessionUpdateParams = Parameters<AgentSideConnection["sessionUpdate"]>[0]
@@ -191,6 +191,181 @@ describe("acp event behavior", () => {
     }
   })
 
+  test("projects foreground child session updates onto the parent turn", async () => {
+    const updates: SessionUpdateParams[] = []
+    const fixture = createSseFixture({
+      onPrompt({ id, send }) {
+        send(durableEvent("session.input.promoted", { sessionID: "ses_parent", inputID: id }))
+        send(
+          durableEvent("session.created", {
+            sessionID: "ses_child",
+            info: childSession("ses_child", "ses_parent", "Explore code"),
+          }),
+        )
+        send(durableEvent("session.execution.started", { sessionID: "ses_child" }))
+        send(
+          durableEvent("session.tool.input.started", {
+            sessionID: "ses_child",
+            assistantMessageID: "msg_child",
+            id: "call_read",
+            name: "read",
+          }),
+        )
+        send(
+          durableEvent("session.tool.called", {
+            sessionID: "ses_child",
+            assistantMessageID: "msg_child",
+            id: "call_read",
+            input: { path: "/workspace/src/index.ts" },
+            executed: false,
+          }),
+        )
+        send(
+          durableEvent("session.tool.success", {
+            sessionID: "ses_child",
+            assistantMessageID: "msg_child",
+            id: "call_read",
+            metadata: {},
+            content: [{ type: "text", text: "source" }],
+            executed: true,
+          }),
+        )
+        send(durableEvent("session.execution.succeeded", { sessionID: "ses_child" }))
+        send(durableEvent("session.execution.succeeded", { sessionID: "ses_parent" }))
+      },
+    })
+
+    try {
+      const response = await turn({
+        fixture,
+        connection: recordingConnection(updates),
+        sessionID: "ses_parent",
+        inputID: "input_parent",
+      })
+
+      expect(updates.map((item) => [item.sessionId, item.update.sessionUpdate])).toEqual([
+        ["ses_parent", "tool_call"],
+        ["ses_parent", "tool_call_update"],
+        ["ses_parent", "tool_call_update"],
+      ])
+      expect(updates.map((item) => ("toolCallId" in item.update ? item.update.toolCallId : undefined))).toEqual([
+        "ses_child:call_read",
+        "ses_child:call_read",
+        "ses_child:call_read",
+      ])
+      expect(updates[0]?.update).toMatchObject({
+        title: "Explore code: read",
+        _meta: {
+          "opencode/child-session": {
+            id: "ses_child",
+            parentID: "ses_parent",
+            depth: 1,
+            title: "Explore code",
+          },
+        },
+      })
+      expect(response.stopReason).toBe("end_turn")
+    } finally {
+      await fixture.stop()
+    }
+  })
+
+  test("continues child extension updates after the parent turn ends", async () => {
+    const updates: SessionUpdateParams[] = []
+    const childUpdates: ChildSessionUpdate[] = []
+    const completed = Promise.withResolvers<void>()
+    const fixture = createSseFixture({
+      onPrompt({ id, send }) {
+        send(durableEvent("session.input.promoted", { sessionID: "ses_parent", inputID: id }))
+        send(
+          durableEvent("session.created", {
+            sessionID: "ses_background",
+            info: childSession("ses_background", "ses_parent", "Background research"),
+          }),
+        )
+        send(durableEvent("session.execution.succeeded", { sessionID: "ses_parent" }))
+      },
+    })
+
+    try {
+      const response = await turn({
+        fixture,
+        connection: recordingConnection(updates),
+        sessionID: "ses_parent",
+        inputID: "input_parent",
+        childSessionUpdate: async (update) => {
+          childUpdates.push(update)
+          if (update.type === "status" && update.status === "completed") completed.resolve()
+        },
+      })
+      expect(response.stopReason).toBe("end_turn")
+
+      fixture.send(
+        durableEvent("session.created", {
+          sessionID: "ses_future",
+          info: childSession("ses_future", "ses_parent", "Later turn child"),
+        }),
+      )
+      fixture.send(durableEvent("session.execution.started", { sessionID: "ses_future" }))
+      fixture.send(durableEvent("session.execution.started", { sessionID: "ses_background" }))
+      fixture.send(
+        durableEvent("session.tool.input.started", {
+          sessionID: "ses_background",
+          assistantMessageID: "msg_background",
+          id: "call_shell",
+          name: "shell",
+        }),
+      )
+      fixture.send(
+        durableEvent("session.tool.called", {
+          sessionID: "ses_background",
+          assistantMessageID: "msg_background",
+          id: "call_shell",
+          input: { command: "pwd" },
+          executed: false,
+        }),
+      )
+      fixture.send(
+        durableEvent("session.tool.success", {
+          sessionID: "ses_background",
+          assistantMessageID: "msg_background",
+          id: "call_shell",
+          metadata: { exit: 0 },
+          content: [{ type: "text", text: "/workspace" }],
+          executed: true,
+        }),
+      )
+      fixture.send(durableEvent("session.execution.succeeded", { sessionID: "ses_background" }))
+      await withTimeout(completed.promise, "background child completion was not delivered")
+
+      expect(updates).toEqual([])
+      expect(
+        childUpdates.map((update) =>
+          update.type === "status" ? [update.type, update.status] : [update.type, update.update.sessionUpdate],
+        ),
+      ).toEqual([
+        ["status", "created"],
+        ["status", "running"],
+        ["update", "tool_call"],
+        ["update", "tool_call_update"],
+        ["update", "tool_call_update"],
+        ["status", "completed"],
+      ])
+      expect(childUpdates[2]).toMatchObject({
+        rootSessionId: "ses_parent",
+        childSessionId: "ses_background",
+        parentSessionId: "ses_parent",
+        depth: 1,
+        title: "Background research",
+        type: "update",
+        update: { toolCallId: "ses_background:call_shell" },
+      })
+      expect(childUpdates.some((update) => update.childSessionId === "ses_future")).toBe(false)
+    } finally {
+      await fixture.stop()
+    }
+  })
+
   test("streams tool pending, progress, success, and failure updates", async () => {
     const updates: SessionUpdateParams[] = []
     const fixture = createSseFixture({
@@ -556,6 +731,7 @@ function turn(input: {
   readonly connection: Connection
   readonly sessionID: string
   readonly inputID: string
+  readonly childSessionUpdate?: (update: ChildSessionUpdate) => Promise<void>
 }) {
   return streamTurn({
     client: input.fixture.client,
@@ -565,11 +741,25 @@ function turn(input: {
     start: { type: "input", id: input.inputID },
     writeTextFile: false,
     control: { cancelled: false, admission: new AbortController() },
+    childSessionUpdate: input.childSessionUpdate,
     submit: (signal) =>
       input.fixture.client.session.prompt({ sessionID: input.sessionID, id: input.inputID, text: "hello" }, { signal }),
   })
 }
 
+function childSession(id: string, parentID: string, title: string) {
+  return {
+    id,
+    slug: id,
+    projectID: "project",
+    directory: "/workspace",
+    parentID,
+    title,
+    version: "test",
+    time: { created: 1, updated: 1 },
+  }
+}
+
 function tokens() {
   return { input: 1, output: 1, reasoning: 0, cache: { read: 0, write: 0 } }
 }

packages/cli/test/acp/permission-behavior.test.ts

@@ -153,6 +153,68 @@ describe("acp permission behavior", () => {
     }
   })
 
+  test("routes foreground child permissions through the parent ACP session", async () => {
+    const permissionRequests: RequestPermissionRequest[] = []
+    const fixture = createSseFixture({
+      onPrompt({ id, send }) {
+        send(durableEvent("session.input.promoted", { sessionID: "ses_parent", inputID: id }))
+        send(
+          durableEvent("session.created", {
+            sessionID: "ses_child",
+            info: {
+              id: "ses_child",
+              slug: "ses_child",
+              projectID: "project",
+              directory: "/workspace",
+              parentID: "ses_parent",
+              title: "Review code",
+              version: "test",
+              time: { created: 1, updated: 1 },
+            },
+          }),
+        )
+        send(durableEvent("session.execution.started", { sessionID: "ses_child" }))
+        send(
+          permissionAsked("ses_child", "perm_child", {
+            action: "read",
+            metadata: { path: "/workspace/child.ts" },
+            source: { type: "tool", messageID: "msg_child", id: "call_child" },
+          }),
+        )
+        send(durableEvent("session.execution.succeeded", { sessionID: "ses_child" }))
+        send(durableEvent("session.execution.succeeded", { sessionID: "ses_parent" }))
+      },
+    })
+    const connection = {
+      sessionUpdate: async () => {},
+      requestPermission: async (request) => {
+        permissionRequests.push(request)
+        return { outcome: { outcome: "selected", optionId: "once" } } as const
+      },
+    } satisfies Connection
+
+    try {
+      await startTurn(fixture, connection, "ses_parent", "input_parent")
+
+      expect(permissionRequests).toHaveLength(1)
+      expect(permissionRequests[0]).toMatchObject({
+        sessionId: "ses_parent",
+        toolCall: {
+          toolCallId: "ses_child:call_child",
+          title: "Review code: /workspace/child.ts",
+        },
+      })
+      expect(fixture.requests).toContainEqual(
+        expect.objectContaining({
+          method: "POST",
+          path: "/api/session/ses_child/permission/perm_child/reply",
+        }),
+      )
+    } finally {
+      await fixture.stop()
+    }
+  })
+
   test("previews edits during approval and syncs the completed file", async () => {
     const cwd = await fs.mkdtemp(path.join(os.tmpdir(), "opencode-acp-permission-"))
     const file = path.join(cwd, "file.ts")

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

@@ -2,6 +2,7 @@ import { describe, expect, test } from "bun:test"
 import type { AgentSideConnection } from "@agentclientprotocol/sdk"
 import { OpenCode } from "@opencode-ai/client/promise"
 import { ACPService } from "../../src/acp/service"
+import { ChildSessionUpdatesCapability } from "../../src/acp/event"
 
 describe("acp service", () => {
   test("creates a v2 session, registers mcp, and publishes commands", async () => {
@@ -39,11 +40,17 @@ describe("acp service", () => {
     })
 
     try {
+      const initialized = await service.initialize({
+        protocolVersion: 1,
+        clientCapabilities: { _meta: { [ChildSessionUpdatesCapability]: true } },
+        clientInfo: { name: "test", version: "1" },
+      })
       const result = await service.newSession({
         cwd: "/workspace",
         mcpServers: [{ name: "docs", command: "bun", args: ["docs.ts"], env: [{ name: "TOKEN", value: "x" }] }],
       })
       expect(result.sessionId).toBe("ses_acp")
+      expect(initialized.agentCapabilities?._meta).toEqual({ [ChildSessionUpdatesCapability]: true })
       expect(result.configOptions?.map((option) => option.id)).toEqual(["model", "effort", "mode"])
       expect(requests).toContainEqual({
         method: "PUT",

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

@@ -420,6 +420,7 @@ export type Endpoint5_26Output =
           readonly data: {
             readonly sessionID: Session.ID
             readonly delta: { readonly [x: string]: (string & Brand.Brand<"Instruction.Hash">) | "removed" }
+            readonly text?: string | undefined
           }
         }
       | {

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

@@ -676,7 +676,7 @@ export type SessionInstructionsUpdated = {
   type: "session.instructions.updated"
   durable: { aggregateID: string; seq: number; version: 2 }
   location?: LocationRef
-  data: { sessionID: string; delta: { [x: string]: string | "removed" } }
+  data: { sessionID: string; delta: { [x: string]: string | "removed" }; text?: string }
 }
 
 export type SessionSynthetic = {

packages/core/src/agent.ts

@@ -44,7 +44,6 @@ export type Draft = {
 
 export interface Interface extends State.Transformable<Draft> {
   readonly get: (id: ID) => Effect.Effect<Info | undefined>
-  readonly default: () => Effect.Effect<Info | undefined>
   readonly resolve: (id?: ID | string) => Effect.Effect<Info | undefined>
   readonly select: (id?: ID | string) => Effect.Effect<Selection>
   readonly list: () => Effect.Effect<Info[]>
@@ -110,9 +109,6 @@ const layer = Layer.effect(
       get: Effect.fn("Agent.get")(function* (id) {
         return state.get().agents.get(id)
       }),
-      default: Effect.fn("Agent.default")(function* () {
-        return selectedDefault()
-      }),
       resolve: Effect.fn("Agent.resolve")(function* (id) {
         if (id !== undefined) return state.get().agents.get(ID.make(id))
         return selectedDefault()

packages/core/src/bus.ts

@@ -3,7 +3,7 @@ export * as Bus from "./bus"
 import { Cause, Context, DateTime, Effect, Layer, Option, PubSub, Schema, Stream } from "effect"
 import { Event } from "@opencode-ai/schema/event"
 import type { EventLog } from "@opencode-ai/schema/event-log"
-import { and, asc, eq, gt, inArray, lte, sql } from "drizzle-orm"
+import { and, asc, eq, gt, lte, sql } from "drizzle-orm"
 import { Database } from "./database/database"
 import { EventSequenceTable, EventTable } from "./event/sql"
 import { Location } from "./location"
@@ -134,8 +134,6 @@ export interface Interface {
     readonly after?: number
     readonly follow?: boolean
   }) => Stream.Stream<LogItem>
-  /** Latest committed seq per aggregate. Aggregates without events are absent. */
-  readonly sequences: (aggregateIDs: ReadonlyArray<string>) => Effect.Effect<ReadonlyMap<string, Event.Seq>>
   /** @deprecated Use `subscribe()` and consume the returned stream. */
   readonly listen: (listener: Subscriber) => Effect.Effect<Unsubscribe>
   readonly project: <D extends Event.Definition>(definition: D, projector: Subscriber<D>) => Effect.Effect<void>
@@ -657,19 +655,6 @@ export const layerWith = (options?: LayerOptions) =>
           }),
         )
 
-      const sequences = (aggregateIDs: ReadonlyArray<string>): Effect.Effect<ReadonlyMap<string, Event.Seq>> => {
-        if (aggregateIDs.length === 0) return Effect.succeed(new Map())
-        return db
-          .select({ aggregateID: EventSequenceTable.aggregate_id, seq: EventSequenceTable.seq })
-          .from(EventSequenceTable)
-          .where(inArray(EventSequenceTable.aggregate_id, Array.from(aggregateIDs)))
-          .all()
-          .pipe(
-            Effect.orDie,
-            Effect.map((rows) => new Map(rows.map((row) => [row.aggregateID, Event.Seq.make(row.seq)]))),
-          )
-      }
-
       const listen = (listener: Subscriber): Effect.Effect<Unsubscribe> =>
         Effect.sync(() => {
           listeners.push(listener)
@@ -691,7 +676,6 @@ export const layerWith = (options?: LayerOptions) =>
         publish,
         subscribe,
         log,
-        sequences,
         listen,
         project,
         replay,

packages/core/src/file-mutation.ts

@@ -1,8 +1,7 @@
 export * as FileMutation from "./file-mutation"
 
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
-import { Context, Effect, Layer, Schema } from "effect"
-import { dirname } from "path"
+import { Context, Effect, Layer } from "effect"
 import { KeyedMutex } from "./effect/keyed-mutex"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Bom } from "@opencode-ai/util/bom"
@@ -22,22 +21,6 @@ export interface TextWriteInput {
   readonly content: string
 }
 
-export interface ConditionalWriteInput extends WriteInput {
-  readonly expected: Uint8Array
-}
-
-export interface RemoveInput {
-  readonly target: Target
-}
-
-export class StaleContentError extends Schema.TaggedErrorClass<StaleContentError>()("FileMutation.StaleContentError", {
-  path: Schema.String,
-}) {}
-
-export class TargetExistsError extends Schema.TaggedErrorClass<TargetExistsError>()("FileMutation.TargetExistsError", {
-  path: Schema.String,
-}) {}
-
 export interface WriteResult {
   readonly operation: "write"
   readonly target: string
@@ -45,24 +28,10 @@ export interface WriteResult {
   readonly existed: boolean
 }
 
-export interface RemoveResult {
-  readonly operation: "remove"
-  readonly target: string
-  readonly resource: string
-  readonly existed: boolean
-}
-
 export interface Interface {
-  /** Create without replacing an existing target. */
-  readonly create: (input: WriteInput) => Effect.Effect<WriteResult, TargetExistsError | FSUtil.Error>
   readonly write: (input: WriteInput) => Effect.Effect<WriteResult, FSUtil.Error>
   /** Write text while retaining an existing UTF-8 BOM and emitting at most one BOM. */
   readonly writeTextPreservingBom: (input: TextWriteInput) => Effect.Effect<WriteResult, FSUtil.Error>
-  /** Commit only if an existing target still has the expected bytes. */
-  readonly writeIfUnchanged: (
-    input: ConditionalWriteInput,
-  ) => Effect.Effect<WriteResult, StaleContentError | FSUtil.Error>
-  readonly remove: (input: RemoveInput) => Effect.Effect<RemoveResult, FSUtil.Error>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/FileMutation") {}
@@ -89,13 +58,6 @@ const layer = Layer.effect(
       existed,
     })
 
-    const removeResult = (target: Target, existed: boolean): RemoveResult => ({
-      operation: "remove",
-      target: target.canonical,
-      resource: target.resource,
-      existed,
-    })
-
     const write = Effect.fn("FileMutation.write")((input: WriteInput) =>
       withTargetLock(input.target)(
         Effect.gen(function* () {
@@ -122,62 +84,10 @@ const layer = Layer.effect(
       ),
     )
 
-    const create = Effect.fn("FileMutation.create")((input: WriteInput) =>
-      withTargetLock(input.target)(
-        Effect.gen(function* () {
-          const write =
-            typeof input.content === "string"
-              ? fs.writeFileString(input.target.canonical, input.content, { flag: "wx" })
-              : fs.writeFile(input.target.canonical, input.content, { flag: "wx" })
-          yield* write.pipe(
-            Effect.catchReason("PlatformError", "NotFound", () =>
-              fs.ensureDir(dirname(input.target.canonical)).pipe(Effect.andThen(write)),
-            ),
-            Effect.catchReason("PlatformError", "AlreadyExists", () =>
-              Effect.fail(new TargetExistsError({ path: input.target.canonical })),
-            ),
-          )
-          return writeResult(input.target, false)
-        }),
-      ),
-    )
-
-    const writeIfUnchanged = Effect.fn("FileMutation.writeIfUnchanged")((input: ConditionalWriteInput) =>
-      withTargetLock(input.target)(
-        Effect.gen(function* () {
-          const current = yield* fs.readFile(input.target.canonical)
-          if (!sameBytes(current, input.expected)) {
-            return yield* new StaleContentError({ path: input.target.canonical })
-          }
-          yield* typeof input.content === "string"
-            ? fs.writeFileString(input.target.canonical, input.content)
-            : fs.writeFile(input.target.canonical, input.content)
-          return writeResult(input.target, true)
-        }),
-      ),
-    )
-
-    const remove = Effect.fn("FileMutation.remove")((input: RemoveInput) =>
-      withTargetLock(input.target)(
-        Effect.gen(function* () {
-          const existed = yield* fs.remove(input.target.canonical).pipe(
-            Effect.as(true),
-            Effect.catchReason("PlatformError", "NotFound", () => Effect.succeed(false)),
-          )
-          return removeResult(input.target, existed)
-        }),
-      ),
-    )
-
-    return Service.of({ create, write, writeTextPreservingBom, writeIfUnchanged, remove })
+    return Service.of({ write, writeTextPreservingBom })
   }),
 )
 
-function sameBytes(left: Uint8Array, right: Uint8Array) {
-  if (left.length !== right.length) return false
-  return left.every((byte, index) => byte === right[index])
-}
-
 export const node = makeLocationNode({ service: Service, layer, deps: [FSUtil.node] })
 
 /**

packages/core/src/filesystem.ts

@@ -7,7 +7,7 @@ import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Location } from "./location"
 import { PositiveInt, RelativePath } from "./schema"
 import { FileSystemSearch } from "./filesystem/search"
-import { Entry, FileSystem, FindInput, Match } from "@opencode-ai/schema/filesystem"
+import { Entry, FileSystem, FindInput } from "@opencode-ai/schema/filesystem"
 export { Entry, Match, Submatch } from "@opencode-ai/schema/filesystem"
 
 export const ReadInput = Schema.Struct({
@@ -53,8 +53,6 @@ export interface Interface {
   readonly read: (input: ReadInput) => Effect.Effect<{ readonly content: Uint8Array; readonly mime: string }>
   readonly list: (input?: ListInput) => Effect.Effect<Entry[]>
   readonly find: (input: FindInput) => Effect.Effect<Entry[]>
-  readonly glob: (input: GlobInput) => Effect.Effect<readonly Entry[]>
-  readonly grep: (input: GrepInput) => Effect.Effect<readonly Match[]>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/FileSystem") {}
@@ -76,8 +74,6 @@ const baseLayer = Layer.effect(
     })
     return Service.of({
       find: search.find,
-      glob: search.glob,
-      grep: search.grep,
       read: Effect.fn("FileSystem.read")(function* (input) {
         const target = yield* resolve(input.path)
         const info = yield* fs.stat(target.real).pipe(Effect.orDie)

packages/core/src/filesystem/fff.bun.ts

@@ -3,9 +3,6 @@ import {
   type DirItem,
   type DirSearchResult,
   type FileItem,
-  type GrepCursor,
-  type GrepMatch,
-  type GrepResult,
   type InitOptions,
   type MixedItem,
   type MixedSearchResult,
@@ -45,19 +42,6 @@ export interface MixedSearch {
 export type File = FileItem
 export type Directory = DirItem
 export type Mixed = MixedItem
-export type Cursor = GrepCursor | null
-export type Hit = GrepMatch
-
-export interface Grep {
-  items: GrepResult["items"]
-  totalMatched: number
-  totalFilesSearched: number
-  totalFiles: number
-  filteredFileCount: number
-  nextCursor: Cursor
-  regexFallbackError?: string
-}
-
 export interface Picker {
   destroy(): void
   isScanning(): boolean
@@ -71,14 +55,6 @@ export interface Picker {
       pageSize?: number
     },
   ): Result<Search>
-  glob(
-    pattern: string,
-    opts?: {
-      currentFile?: string
-      pageIndex?: number
-      pageSize?: number
-    },
-  ): Result<Search>
   directorySearch(
     query: string,
     opts?: {
@@ -95,18 +71,6 @@ export interface Picker {
       pageSize?: number
     },
   ): Result<MixedSearch>
-  grep(
-    query: string,
-    opts?: {
-      mode?: "plain" | "regex" | "fuzzy"
-      maxMatchesPerFile?: number
-      timeBudgetMs?: number
-      beforeContext?: number
-      afterContext?: number
-      cursor?: Cursor
-      pageSize?: number
-    },
-  ): Result<Grep>
   trackQuery(query: string, file: string): Result<boolean>
   getHistoricalQuery(offset: number): Result<string | null>
 }
@@ -127,10 +91,8 @@ export function create(opts: Init): Result<Picker> {
       waitForScan: (timeoutMs) => pick.waitForScan(timeoutMs),
       refreshGitStatus: () => pick.refreshGitStatus(),
       fileSearch: (query, next) => pick.fileSearch(query, next),
-      glob: (pattern, next) => pick.glob(pattern, next),
       directorySearch: (query, next) => pick.directorySearch(query, next),
       mixedSearch: (query, next) => pick.mixedSearch(query, next),
-      grep: (query, next) => pick.grep(query, next),
       trackQuery: (query, file) => pick.trackQuery(query, file),
       getHistoricalQuery: (offset) => pick.getHistoricalQuery(offset),
     },

packages/core/src/filesystem/fff.node.ts

@@ -2,9 +2,6 @@ import type {
   DirItem,
   DirSearchResult,
   FileItem,
-  GrepCursor,
-  GrepMatch,
-  GrepResult,
   InitOptions,
   MixedItem,
   MixedSearchResult,
@@ -42,19 +39,6 @@ export interface MixedSearch {
 export type File = FileItem
 export type Directory = DirItem
 export type Mixed = MixedItem
-export type Cursor = GrepCursor | null
-export type Hit = GrepMatch
-
-export interface Grep {
-  items: GrepResult["items"]
-  totalMatched: number
-  totalFilesSearched: number
-  totalFiles: number
-  filteredFileCount: number
-  nextCursor: Cursor
-  regexFallbackError?: string
-}
-
 export interface Picker {
   destroy(): void
   isScanning(): boolean
@@ -68,14 +52,6 @@ export interface Picker {
       pageSize?: number
     },
   ): Result<Search>
-  glob(
-    pattern: string,
-    opts?: {
-      currentFile?: string
-      pageIndex?: number
-      pageSize?: number
-    },
-  ): Result<Search>
   directorySearch(
     query: string,
     opts?: {
@@ -92,18 +68,6 @@ export interface Picker {
       pageSize?: number
     },
   ): Result<MixedSearch>
-  grep(
-    query: string,
-    opts?: {
-      mode?: "plain" | "regex" | "fuzzy"
-      maxMatchesPerFile?: number
-      timeBudgetMs?: number
-      beforeContext?: number
-      afterContext?: number
-      cursor?: Cursor
-      pageSize?: number
-    },
-  ): Result<Grep>
   trackQuery(query: string, file: string): Result<boolean>
   getHistoricalQuery(offset: number): Result<string | null>
 }
@@ -125,10 +89,8 @@ export function create(opts: Init): Result<Picker> {
       waitForScan: (timeoutMs) => pick.waitForScan(timeoutMs),
       refreshGitStatus: () => pick.refreshGitStatus(),
       fileSearch: (query, next) => pick.fileSearch(query, next),
-      glob: (pattern, next) => pick.glob(pattern, next),
       directorySearch: (query, next) => pick.directorySearch(query, next),
       mixedSearch: (query, next) => pick.mixedSearch(query, next),
-      grep: (query, next) => pick.grep(query, next),
       trackQuery: (query, file) => pick.trackQuery(query, file),
       getHistoricalQuery: (offset) => pick.getHistoricalQuery(offset),
     },

packages/core/src/filesystem/location-watcher.ts

@@ -3,7 +3,6 @@ export * as LocationWatcher from "./location-watcher"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { Context, Effect, Layer, Stream } from "effect"
 import { FileSystem } from "@opencode-ai/schema/filesystem"
-import os from "os"
 import path from "path"
 import { Config } from "../config"
 import { Bus } from "../bus"
@@ -44,7 +43,7 @@ const layer = Layer.effect(
       const config = (yield* configService.entries())
         .filter((entry): entry is Config.Document => entry.type === "document")
         .flatMap((item) => item.info.watcher?.ignore ?? [])
-      const home = path.resolve(location.directory) === path.resolve(os.homedir())
+      const home = Protected.isHome(location.directory)
 
       if (!home && location.vcs) {
         const updates = yield* watcher.subscribe({

packages/core/src/filesystem/protected.ts

@@ -3,6 +3,10 @@ import path from "path"
 
 const home = os.homedir()
 
+export function isHome(directory: string) {
+  return path.resolve(directory) === path.resolve(home)
+}
+
 const DARWIN_HOME = [
   "Music",
   "Pictures",

packages/core/src/filesystem/search.ts

@@ -6,15 +6,13 @@ import { Context, Effect, Layer, Schema, Scope } from "effect"
 import { Fff } from "#fff"
 import fuzzysort from "fuzzysort"
 import { FileSystem } from "../filesystem"
-import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Location } from "../location"
 import { Ripgrep } from "../ripgrep"
 import { RelativePath } from "../schema"
+import { Protected } from "./protected"
 
 export interface Interface {
   readonly find: (input: FileSystem.FindInput) => Effect.Effect<FileSystem.Entry[]>
-  readonly glob: (input: FileSystem.GlobInput) => Effect.Effect<readonly FileSystem.Entry[]>
-  readonly grep: (input: FileSystem.GrepInput) => Effect.Effect<readonly FileSystem.Match[]>
 }
 
 export const Options = Schema.Struct({
@@ -27,89 +25,35 @@ export class Service extends Context.Service<Service, Interface>()("@opencode/Fi
 export const ripgrepLayer = Layer.effect(
   Service,
   Effect.gen(function* () {
-    const fs = yield* FSUtil.Service
     const location = yield* Location.Service
     const ripgrep = yield* Ripgrep.Service
     const scope = yield* Scope.Scope
-    const state = {
-      files: [] as string[],
-      directories: [] as string[],
-    }
+    const files: string[] = []
     const directories = new Set<string>()
+    const home = Protected.isHome(location.directory)
     yield* ripgrep
       .find({
         cwd: location.directory,
         pattern: "*",
-        limit: location.vcs ? Number.MAX_SAFE_INTEGER : 100_000,
+        limit: location.vcs && !home ? Number.MAX_SAFE_INTEGER : 100_000,
+        exclude: home ? [...Protected.names()].map((name) => `${name}/**`) : undefined,
         onEntry: (entry) =>
           Effect.sync(() => {
-            state.files.push(entry.path)
+            files.push(entry.path)
             const parts = entry.path.split("/")
             parts.slice(0, -1).forEach((_, index) => directories.add(parts.slice(0, index + 1).join("/") + path.sep))
-            state.directories = Array.from(directories)
           }),
       })
       .pipe(Effect.orDie, Effect.asVoid, Effect.forkIn(scope))
     return Service.of({
-      glob: (input) =>
-        Effect.gen(function* () {
-          const target = path.resolve(location.directory, input.path ?? ".")
-          const info = yield* fs.stat(target).pipe(Effect.orDie)
-          const cwd = info.type === "File" ? path.dirname(target) : target
-          return yield* ripgrep
-            .glob({
-              cwd,
-              pattern: input.pattern,
-              limit: input.limit ?? FileSystem.DEFAULT_SEARCH_LIMIT,
-            })
-            .pipe(
-              Effect.map((result) =>
-                result.map((entry) =>
-                  FileSystem.Entry.make({
-                    ...entry,
-                    path: RelativePath.make(path.relative(location.directory, path.resolve(cwd, entry.path))),
-                  }),
-                ),
-              ),
-              Effect.orDie,
-            )
-        }),
-      grep: (input) =>
-        Effect.gen(function* () {
-          const target = path.resolve(location.directory, input.path ?? ".")
-          const info = yield* fs.stat(target).pipe(Effect.orDie)
-          const cwd = info.type === "File" ? path.dirname(target) : target
-          return yield* ripgrep
-            .grep({
-              cwd,
-              pattern: input.pattern,
-              file: info.type === "File" ? path.basename(target) : undefined,
-              include: input.include,
-              limit: input.limit ?? FileSystem.DEFAULT_SEARCH_LIMIT,
-            })
-            .pipe(
-              Effect.map((result) =>
-                result.map((match) =>
-                  FileSystem.Match.make({
-                    ...match,
-                    entry: FileSystem.Entry.make({
-                      ...match.entry,
-                      path: RelativePath.make(path.relative(location.directory, path.resolve(cwd, match.entry.path))),
-                    }),
-                  }),
-                ),
-              ),
-              Effect.orDie,
-            )
-        }),
       find: (input) =>
         Effect.gen(function* () {
           const items =
             input.type === "file"
-              ? state.files
+              ? files
               : input.type === "directory"
-                ? state.directories
-                : [...state.files, ...state.directories]
+                ? Array.from(directories)
+                : [...files, ...directories]
           return fuzzysort.go(input.query, items, { limit: input.limit ?? 50 }).map((item) => {
             const relative = item.target
             const type = relative.endsWith(path.sep) ? ("directory" as const) : ("file" as const)
@@ -143,55 +87,10 @@ export const fffLayer = Layer.effect(
       if (result) yield* Effect.logWarning("failed to initialize fff", { error: result.error })
       return Service.of({
         find: () => Effect.succeed([]),
-        glob: () => Effect.succeed([]),
-        grep: () => Effect.succeed([]),
       })
     }
     yield* Effect.addFinalizer(() => Effect.sync(() => result.value.destroy()).pipe(Effect.ignore))
     return Service.of({
-      glob: (input) =>
-        Effect.sync(() => {
-          const prefix = input.path?.replaceAll("\\", "/").replace(/\/$/, "")
-          const found = result.value.glob(prefix ? `${prefix}/${input.pattern}` : input.pattern, {
-            pageIndex: 0,
-            pageSize: input.limit ?? FileSystem.DEFAULT_SEARCH_LIMIT,
-          })
-          if (!found.ok) throw found.error
-          return found.value.items.map((item) =>
-            FileSystem.Entry.make({
-              path: RelativePath.make(item.relativePath.replaceAll("\\", "/")),
-              type: "file",
-            }),
-          )
-        }),
-      grep: (input) =>
-        Effect.sync(() => {
-          const prefix = input.path?.replaceAll("\\", "/").replace(/\/$/, "")
-          const found = result.value.grep(
-            [prefix ? `${prefix}/**` : undefined, input.include, input.pattern]
-              .filter((value) => value !== undefined)
-              .join(" "),
-            { mode: "regex", pageSize: input.limit ?? FileSystem.DEFAULT_SEARCH_LIMIT, timeBudgetMs: 1_500 },
-          )
-          if (!found.ok) throw found.error
-          return found.value.items.map((match) => {
-            const bytes = Buffer.from(match.lineContent)
-            return FileSystem.Match.make({
-              entry: FileSystem.Entry.make({
-                path: RelativePath.make(match.relativePath.replaceAll("\\", "/")),
-                type: "file",
-              }),
-              line: match.lineNumber,
-              offset: match.byteOffset,
-              text: match.lineContent.length > 2_000 ? match.lineContent.slice(0, 2_000) + "..." : match.lineContent,
-              submatches: match.matchRanges.map(([start, end]) => ({
-                text: bytes.subarray(start, end).toString("utf8"),
-                start,
-                end,
-              })),
-            })
-          })
-        }),
       find: (input) =>
         Effect.sync(() => {
           const options = { pageIndex: 0, pageSize: input.limit ?? 50 }
@@ -236,18 +135,19 @@ export const fffLayer = Layer.effect(
   }),
 )
 
-export const layer = (options?: Options) => Layer.unwrap(
-  Effect.gen(function* () {
-    if (options?.fff === false || (options?.fff === undefined && process.platform === "win32") || !Fff.available())
-      return ripgrepLayer
-    const location = yield* Location.Service
-    // Non-VCS locations can contain many repositories, so avoid eagerly content-indexing the entire aggregate tree.
-    return location.vcs ? fffLayer : ripgrepLayer
-  }),
-)
+export const layer = (options?: Options) =>
+  Layer.unwrap(
+    Effect.gen(function* () {
+      if (options?.fff === false || (options?.fff === undefined && process.platform === "win32") || !Fff.available())
+        return ripgrepLayer
+      const location = yield* Location.Service
+      // Non-VCS locations can contain many repositories, so avoid eagerly content-indexing the entire aggregate tree.
+      return location.vcs && !Protected.isHome(location.directory) ? fffLayer : ripgrepLayer
+    }),
+  )
 
 export function configured(options?: Options) {
-  return makeLocationNode({ service: Service, layer: layer(options), deps: [FSUtil.node, Location.node, Ripgrep.node] })
+  return makeLocationNode({ service: Service, layer: layer(options), deps: [Location.node, Ripgrep.node] })
 }
 
 export const node = configured()

packages/core/src/formatter.ts

@@ -1,6 +1,6 @@
 export * as Formatter from "./formatter"
 
-import { Context, Effect, Layer, Schema } from "effect"
+import { Context, Effect, Layer } from "effect"
 import { ChildProcess } from "effect/unstable/process"
 import path from "path"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
@@ -11,16 +11,7 @@ import { Config } from "./config"
 import { Location } from "./location"
 import { make, type Info } from "./formatter/builtins"
 
-export const Status = Schema.Struct({
-  name: Schema.String,
-  extensions: Schema.Array(Schema.String),
-  enabled: Schema.Boolean,
-}).annotate({ identifier: "FormatterStatus" })
-export type Status = typeof Status.Type
-
 export interface Interface {
-  readonly init: () => Effect.Effect<void>
-  readonly status: () => Effect.Effect<Status[]>
   readonly file: (filepath: string) => Effect.Effect<boolean>
 }
 
@@ -84,23 +75,6 @@ const layer = Layer.effect(
       return result
     })
 
-    const init = Effect.fn("Formatter.init")(function* () {
-      yield* load
-    })
-
-    const status = Effect.fn("Formatter.status")(function* () {
-      yield* load
-      return yield* Effect.forEach(formatters, (formatter) =>
-        command(formatter).pipe(
-          Effect.map((enabled) => ({
-            name: formatter.name,
-            extensions: [...formatter.extensions],
-            enabled: enabled !== false,
-          })),
-        ),
-      )
-    })
-
     const file = Effect.fn("Formatter.file")(function* (filepath: string) {
       yield* load
       const matching = formatters.filter((formatter) =>
@@ -143,7 +117,7 @@ const layer = Layer.effect(
       return false
     })
 
-    return Service.of({ init, status, file })
+    return Service.of({ file })
   }),
 )
 

packages/core/src/git.ts

@@ -1,8 +1,7 @@
 export * as Git from "./git"
 
 import path from "path"
-import { randomUUID } from "crypto"
-import { Context, Effect, Layer, Schema, Stream } from "effect"
+import { Context, Effect, Layer, Schema } from "effect"
 import { ChildProcess } from "effect/unstable/process"
 import { AbsolutePath, RelativePath } from "./schema"
 import { FSUtil } from "@opencode-ai/util/fs-util"
@@ -36,9 +35,6 @@ const snapshotConfig = `[core]
 	threads = true
 `
 
-export const ChangeSet = Schema.String.pipe(Schema.brand("Git.ChangeSet"))
-export type ChangeSet = typeof ChangeSet.Type
-
 export const TreeID = Schema.String.pipe(Schema.brand("Git.TreeID"))
 export type TreeID = typeof TreeID.Type
 
@@ -73,13 +69,6 @@ export class WorktreeError extends Schema.TaggedErrorClass<WorktreeError>()("Git
   cause: Schema.optional(Schema.Defect()),
 }) {}
 
-export class PatchError extends Schema.TaggedErrorClass<PatchError>()("Git.PatchError", {
-  operation: Schema.Literals(["capture", "apply", "reset"]),
-  directory: AbsolutePath,
-  message: Schema.String,
-  cause: Schema.optional(Schema.Defect()),
-}) {}
-
 export interface Interface {
   readonly repo: {
     readonly discover: (input: AbsolutePath) => Effect.Effect<Repository | undefined>
@@ -116,20 +105,6 @@ export interface Interface {
     ) => Effect.Effect<void, OperationError>
     readonly resetHard: (repository: Repository, revision: string) => Effect.Effect<void, OperationError>
   }
-  readonly change: {
-    readonly capture: (input: { repository: Repository; path: AbsolutePath }) => Effect.Effect<ChangeSet, PatchError>
-    readonly apply: (input: {
-      repository: Repository
-      path: AbsolutePath
-      changes: ChangeSet
-    }) => Effect.Effect<void, PatchError>
-    readonly discard: (input: {
-      repository: Repository
-      path: AbsolutePath
-      index: "preserve" | "reset"
-      untracked: "preserve" | "remove"
-    }) => Effect.Effect<void, PatchError>
-  }
   readonly worktree: {
     readonly create: (input: {
       repository: Repository
@@ -175,17 +150,10 @@ export interface Interface {
       context?: number
       paths?: readonly RelativePath[]
     }) => Effect.Effect<readonly File.Diff[], OperationError>
-    readonly preview: (input: {
-      repository: Repository
-      current: TreeID
-      files: ReadonlyMap<RelativePath, TreeID>
-      context?: number
-    }) => Effect.Effect<readonly File.Diff[], OperationError>
     readonly restore: (input: {
       repository: Repository
       files: ReadonlyMap<RelativePath, TreeID>
     }) => Effect.Effect<void, OperationError>
-    readonly checkout: (input: { repository: Repository; tree: TreeID }) => Effect.Effect<void, OperationError>
   }
 }
 
@@ -657,58 +625,6 @@ const layer = Layer.effect(
       return { mode: match[1], object: match[2] }
     })
 
-    const preview = Effect.fn("Git.tree.preview")(
-      (input: {
-        repository: Repository
-        current: TreeID
-        files: ReadonlyMap<RelativePath, TreeID>
-        context?: number
-      }) =>
-        locked(
-          input.repository,
-          Effect.gen(function* () {
-            const index = path.join(input.repository.gitDirectory, `preview-${randomUUID()}.index`)
-            const env = { GIT_INDEX_FILE: index }
-            return yield* Effect.gen(function* () {
-              yield* repositoryOperation("diff", input.repository, ["read-tree", input.current], { env })
-              yield* Effect.forEach(
-                input.files,
-                ([file, tree]) =>
-                  Effect.gen(function* () {
-                    const source = yield* entry(input.repository, tree, file)
-                    if (!source) {
-                      yield* repositoryOperation(
-                        "diff",
-                        input.repository,
-                        ["update-index", "--force-remove", "--", file],
-                        { env },
-                      )
-                      return
-                    }
-                    yield* repositoryOperation(
-                      "diff",
-                      input.repository,
-                      ["update-index", "--add", "--cacheinfo", source.mode, source.object, file],
-                      { env },
-                    )
-                  }),
-                { discard: true },
-              )
-              const target = TreeID.make(
-                (yield* repositoryOperation("diff", input.repository, ["write-tree"], { env })).text.trim(),
-              )
-              return yield* treeDiff({
-                repository: input.repository,
-                from: input.current,
-                to: target,
-                context: input.context,
-                paths: Array.from(input.files.keys()),
-              })
-            }).pipe(Effect.ensuring(fs.remove(index).pipe(Effect.catch(() => Effect.void))))
-          }),
-        ),
-    )
-
     const restore = Effect.fn("Git.tree.restore")(
       (input: { repository: Repository; files: ReadonlyMap<RelativePath, TreeID> }) =>
         locked(
@@ -738,142 +654,6 @@ const layer = Layer.effect(
         ),
     )
 
-    const checkoutTree = Effect.fn("Git.tree.checkout")((input: { repository: Repository; tree: TreeID }) =>
-      locked(
-        input.repository,
-        Effect.gen(function* () {
-          yield* repositoryOperation("restore", input.repository, ["read-tree", input.tree])
-          yield* repositoryOperation("restore", input.repository, ["checkout-index", "--all", "--force"])
-        }),
-      ),
-    )
-
-    const capture = Effect.fn("Git.change.capture")(function* (input: { repository: Repository; path: AbsolutePath }) {
-      const scope = path.relative(input.repository.worktree, input.path).replaceAll("\\", "/") || "."
-      const tracked = yield* execute(
-        input.repository.worktree,
-        proc,
-      )(["diff", "--binary", "HEAD", "--", scope]).pipe(
-        Effect.mapError(
-          (cause) => new PatchError({ operation: "capture", directory: input.path, message: cause.message, cause }),
-        ),
-      )
-      if (tracked.exitCode !== 0) {
-        return yield* new PatchError({
-          operation: "capture",
-          directory: input.path,
-          message: tracked.stderr.trim() || tracked.text.trim() || "Failed to capture tracked changes",
-        })
-      }
-
-      const untracked = yield* execute(
-        input.repository.worktree,
-        proc,
-      )(["ls-files", "--others", "--exclude-standard", "-z", "--", scope]).pipe(
-        Effect.mapError(
-          (cause) => new PatchError({ operation: "capture", directory: input.path, message: cause.message, cause }),
-        ),
-      )
-      if (untracked.exitCode !== 0) {
-        return yield* new PatchError({
-          operation: "capture",
-          directory: input.path,
-          message: untracked.stderr.trim() || untracked.text.trim() || "Failed to list untracked changes",
-        })
-      }
-
-      const created = yield* Effect.forEach(untracked.text.split("\0").filter(Boolean), (file) =>
-        execute(
-          input.repository.worktree,
-          proc,
-        )(["diff", "--binary", "--no-index", "--", "/dev/null", file]).pipe(
-          Effect.mapError(
-            (cause) => new PatchError({ operation: "capture", directory: input.path, message: cause.message, cause }),
-          ),
-          Effect.flatMap((result) =>
-            // git diff --no-index returns 1 when differences were found.
-            result.exitCode === 0 || result.exitCode === 1
-              ? Effect.succeed(result.text)
-              : Effect.fail(
-                  new PatchError({
-                    operation: "capture",
-                    directory: input.path,
-                    message:
-                      result.stderr.trim() || result.text.trim() || `Failed to capture untracked change: ${file}`,
-                  }),
-                ),
-          ),
-        ),
-      )
-      return ChangeSet.make([tracked.text, ...created].filter(Boolean).join("\n"))
-    })
-
-    const apply = Effect.fn("Git.change.apply")(function* (input: {
-      repository: Repository
-      path: AbsolutePath
-      changes: ChangeSet
-    }) {
-      const result = yield* proc
-        .run(
-          ChildProcess.make("git", ["apply", "-"], {
-            cwd: input.path,
-            extendEnv: true,
-            stdin: Stream.make(new TextEncoder().encode(input.changes)),
-          }),
-        )
-        .pipe(
-          Effect.mapError(
-            (cause) => new PatchError({ operation: "apply", directory: input.path, message: cause.message, cause }),
-          ),
-        )
-      if (result.exitCode === 0) return
-      return yield* new PatchError({
-        operation: "apply",
-        directory: input.path,
-        message:
-          result.stderr.toString("utf8").trim() || result.stdout.toString("utf8").trim() || "Failed to apply changes",
-      })
-    })
-
-    const discard = Effect.fn("Git.change.discard")(function* (input: {
-      repository: Repository
-      path: AbsolutePath
-      index: "preserve" | "reset"
-      untracked: "preserve" | "remove"
-    }) {
-      const scope = path.relative(input.repository.worktree, input.path).replaceAll("\\", "/") || "."
-      const restore = yield* execute(
-        input.repository.worktree,
-        proc,
-      )(input.index === "reset" ? ["checkout", "HEAD", "--", scope] : ["checkout", "--", scope]).pipe(
-        Effect.mapError(
-          (cause) => new PatchError({ operation: "reset", directory: input.path, message: cause.message, cause }),
-        ),
-      )
-      if (restore.exitCode !== 0) {
-        return yield* new PatchError({
-          operation: "reset",
-          directory: input.path,
-          message: restore.stderr.trim() || restore.text.trim() || "Failed to restore tracked changes",
-        })
-      }
-      if (input.untracked === "preserve") return
-      const clean = yield* execute(
-        input.repository.worktree,
-        proc,
-      )(["clean", "-fd", "--", scope]).pipe(
-        Effect.mapError(
-          (cause) => new PatchError({ operation: "reset", directory: input.path, message: cause.message, cause }),
-        ),
-      )
-      if (clean.exitCode === 0) return
-      return yield* new PatchError({
-        operation: "reset",
-        directory: input.path,
-        message: clean.stderr.trim() || clean.text.trim() || "Failed to clean untracked changes",
-      })
-    })
-
     const worktreeRun = Effect.fnUntraced(function* (
       operation: "create" | "remove" | "list",
       repository: Repository,
@@ -949,7 +729,6 @@ const layer = Layer.effect(
       remote: { get: remote },
       history: { head, branch, defaultRemoteBranch: remoteHead, rootCommits: roots },
       sync: { fetchRemotes: fetch, fetchBranch, checkoutRemoteBranch: checkout, resetHard: reset },
-      change: { capture, apply, discard },
       worktree: { create: worktreeCreate, remove: worktreeRemove, list: worktreeList },
       index: { refresh, ignored },
       tree: {
@@ -957,9 +736,7 @@ const layer = Layer.effect(
         write: writeTree,
         files: treeFiles,
         diff: treeDiff,
-        preview,
         restore,
-        checkout: checkoutTree,
       },
     })
   }),

packages/core/src/project.ts

@@ -59,16 +59,6 @@ export interface Interface {
   readonly list: () => Effect.Effect<ReadonlyArray<Info>>
   readonly directories: (input: DirectoriesInput) => Effect.Effect<Directories>
   readonly resolve: (input: AbsolutePath) => Effect.Effect<Resolved>
-  /**
-   * Temporary bridge method for writing the resolved project ID to the repo-local cache.
-   *
-   * This exists while the old opencode project service and this core project
-   * service work together: core resolves the ID, while the old service still owns
-   * database migration and persistence. The old service should call this after it
-   * finishes migrating from `resolve().previous` to `resolve().id`; once project
-   * persistence moves into core, this separate bridge method can go away.
-   */
-  readonly commit: (input: { store: AbsolutePath; id: ID }) => Effect.Effect<void>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/Project") {}
@@ -268,11 +258,7 @@ const layer = Layer.effect(
       return yield* persist({ id: ID.global, directory, canonical: directory, vcs: undefined })
     })
 
-    const commit = Effect.fn("Project.commit")(function* (input: { store: AbsolutePath; id: ID }) {
-      yield* fs.writeFileString(path.join(input.store, "opencode"), input.id).pipe(Effect.ignore)
-    })
-
-    return Service.of({ list, directories, resolve, commit })
+    return Service.of({ list, directories, resolve })
   }),
 )
 

packages/core/src/repository-cache.ts

@@ -31,14 +31,6 @@ export type EnsureInput = {
   readonly branch?: string
 }
 
-export class InvalidRepositoryError extends Schema.TaggedErrorClass<InvalidRepositoryError>()(
-  "RepositoryCacheInvalidRepositoryError",
-  {
-    repository: Schema.String,
-    message: Schema.String,
-  },
-) {}
-
 export class InvalidBranchError extends Schema.TaggedErrorClass<InvalidBranchError>()(
   "RepositoryCacheInvalidBranchError",
   {
@@ -86,7 +78,6 @@ export class CacheOperationError extends Schema.TaggedErrorClass<CacheOperationE
 ) {}
 
 export type Error =
-  | InvalidRepositoryError
   | InvalidBranchError
   | CloneFailedError
   | FetchFailedError
@@ -103,7 +94,6 @@ export class Service extends Context.Service<Service, Interface>()("@opencode/Re
 
 export function isError(error: unknown): error is Error {
   return (
-    error instanceof InvalidRepositoryError ||
     error instanceof InvalidBranchError ||
     error instanceof CloneFailedError ||
     error instanceof FetchFailedError ||
@@ -114,13 +104,6 @@ export function isError(error: unknown): error is Error {
   )
 }
 
-export const parseRemote = Effect.fn("RepositoryCache.parseRemote")(function* (repository: string) {
-  return yield* Effect.try({
-    try: () => Repository.parseRemote(repository),
-    catch: (error) => new InvalidRepositoryError({ repository, message: errorMessage(error) }),
-  })
-})
-
 export const validateBranch = Effect.fn("RepositoryCache.validateBranch")(function* (branch: string) {
   return yield* Effect.try({
     try: () => Repository.validateBranch(branch),

packages/core/src/repository.ts

@@ -44,16 +44,6 @@ export class InvalidBranchError extends Schema.TaggedErrorClass<InvalidBranchErr
   message: Schema.String,
 }) {}
 
-export type Error = InvalidReferenceError | UnsupportedLocalRepositoryError | InvalidBranchError
-
-export function isError(error: unknown): error is Error {
-  return (
-    error instanceof InvalidReferenceError ||
-    error instanceof UnsupportedLocalRepositoryError ||
-    error instanceof InvalidBranchError
-  )
-}
-
 export function parse(input: string): Reference | undefined {
   const cleaned = normalizeInput(input)
   if (!cleaned) return

packages/core/src/ripgrep.ts

@@ -52,6 +52,7 @@ export interface FindInput {
   readonly cwd: string
   readonly pattern: string
   readonly limit: number
+  readonly exclude?: readonly string[]
   readonly hidden?: boolean
   readonly follow?: boolean
   readonly signal?: AbortSignal
@@ -195,6 +196,7 @@ const layer = Layer.effect(
             ...(input.hidden ? ["--hidden"] : []),
             ...(input.follow ? ["--follow"] : []),
             ...(input.pattern === "*" ? [] : [`--glob=${input.pattern}`]),
+            ...(input.exclude ?? []).map((pattern) => `--glob=!${pattern}`),
             "--glob=!**/.git/**",
             ".",
           ],

packages/core/src/session.ts

@@ -410,7 +410,7 @@ const layer = Layer.effect(
       fork: Effect.fn("Session.fork")(function* (input) {
         const parent = yield* result.get(input.sessionID)
         const boundary = yield* db
-          .select({ id: SessionMessageTable.id, seq: SessionMessageTable.seq })
+          .select({ id: SessionMessageTable.id })
           .from(SessionMessageTable)
           .where(
             and(
@@ -429,13 +429,14 @@ const layer = Layer.effect(
           })
         if (!boundary) return yield* new ForkEmptyError({ sessionID: input.sessionID })
         const sessionID = SessionSchema.ID.create()
-        const instructionThrough =
-          input.boundary.type === "before" ? boundary.seq - 1 : yield* Bus.latestSequence(db, parent.id)
+        // The fork adopts the parent's newest instruction values rather than the
+        // values in effect at the boundary; copied history may contain frozen
+        // instruction-update text the initial baseline already reflects.
         yield* bus.publish(SessionEvent.Forked, {
           sessionID,
           parentID: parent.id,
           boundary: { ...input.boundary, messageID: boundary.id },
-          instructions: yield* InstructionState.valuesAt(db, parent.id, instructionThrough),
+          instructions: yield* InstructionState.current(db, parent.id),
         })
         return yield* result.get(sessionID).pipe(Effect.orDie)
       }),

packages/core/src/session/history.ts

@@ -80,10 +80,9 @@ export const entriesForRunner = Effect.fn("SessionHistory.entriesForRunner")(fun
     .transaction(() =>
       Effect.gen(function* () {
         const messages = yield* messageEntries(db, sessionID)
-        const assembled = yield* InstructionState.assemble(db, sessionID, instructions)
         return {
-          initial: assembled.initial,
-          entries: [...messages, ...assembled.updates].toSorted((a, b) => a.seq - b.seq),
+          initial: yield* InstructionState.initial(db, sessionID, instructions),
+          entries: messages,
         }
       }),
     )
@@ -106,10 +105,9 @@ export const preview = Effect.fn("SessionHistory.preview")(function* (
         )
         const settled = unsettled === -1 ? messages : messages.slice(0, unsettled)
         const assembled = yield* InstructionState.preview(db, sessionID, instructions, observed)
-        const entries = [...settled, ...assembled.updates].toSorted((a, b) => a.seq - b.seq)
         return {
           initial: assembled.initial,
-          messages: entries.map((entry) => entry.message),
+          messages: settled.map((entry) => entry.message),
           instructionUpdate: assembled.update,
         }
       }),

packages/core/src/session/instruction-state.ts

@@ -1,25 +1,20 @@
 export * as InstructionState from "./instruction-state"
 
-import { and, asc, desc, eq, gt, inArray, lte, sql } from "drizzle-orm"
-import { DateTime, Effect, Option, Schema } from "effect"
+import { eq, inArray, sql } from "drizzle-orm"
+import { Effect, Option, Schema } from "effect"
 import type { Database } from "../database/database"
-import { Bus } from "../bus"
-import { EventTable } from "../event/sql"
+import type { Bus } from "../bus"
 import { Instructions } from "../instructions/index"
 import { SessionEvent } from "./event"
-import { SessionMessage } from "./message"
-import { Event } from "@opencode-ai/schema/event"
 import { SessionSchema } from "./schema"
 import { InstructionBlobTable, InstructionStateTable } from "./sql"
 
 type DatabaseService = Database.Interface["db"]
 
-const decodeInstructionsUpdated = Schema.decodeUnknownSync(SessionEvent.InstructionsUpdated.data)
-const decodeForked = Schema.decodeUnknownSync(SessionEvent.Forked.data)
-
 export interface Observation extends Instructions.Admission {
   readonly sessionID: SessionSchema.ID
   readonly initial: boolean
+  readonly previous: Instructions.Values
   readonly current: Instructions.Values
 }
 
@@ -28,13 +23,14 @@ export const observe = Effect.fn("InstructionState.observe")(function* (
   instructions: Instructions.Instructions,
   sessionID: SessionSchema.ID,
 ): Effect.fn.Return<Observation, Instructions.InitializationBlocked> {
-  const [observed, stored] = yield* Effect.all([Instructions.read(instructions), ensure(db, sessionID)], {
+  const [observed, stored] = yield* Effect.all([Instructions.read(instructions), find(db, sessionID)], {
     concurrency: "unbounded",
   })
   const result = yield* observeAgainst(observed, stored?.current_values)
   return {
     sessionID,
     initial: !stored,
+    previous: stored?.current_values ?? {},
     ...result,
   }
 })
@@ -42,12 +38,20 @@ export const observe = Effect.fn("InstructionState.observe")(function* (
 export const commit = Effect.fn("InstructionState.commit")(function* (
   db: DatabaseService,
   bus: Bus.Interface,
+  instructions: Instructions.Instructions,
   observation: Observation,
 ) {
   if (!observation.initial && Object.keys(observation.delta).length === 0) return
+  // The rendered text is frozen into the durable event: replaying it later would
+  // require the Location-scoped registry that produced it.
+  const text = observation.initial ? "" : yield* renderUpdateText(db, instructions, observation)
   yield* bus.publish(
     SessionEvent.InstructionsUpdated,
-    { sessionID: observation.sessionID, delta: observation.delta },
+    {
+      sessionID: observation.sessionID,
+      delta: observation.delta,
+      ...(text.length > 0 ? { text } : {}),
+    },
     {
       // Initial sync establishes the baseline; unlike later deltas it is not chronological history.
       ...(observation.initial ? { metadata: { instructions: { initial: true } } } : {}),
@@ -56,13 +60,27 @@ export const commit = Effect.fn("InstructionState.commit")(function* (
   )
 })
 
+const renderUpdateText = Effect.fnUntraced(function* (
+  db: DatabaseService,
+  instructions: Instructions.Instructions,
+  observation: Observation,
+) {
+  const replaced = Object.entries(observation.previous).filter(([key]) => Object.hasOwn(observation.delta, key))
+  const blobs = yield* loadBlobs(db, replaced.map(([, hash]) => hash))
+  const previous = Object.fromEntries(replaced.map(([key, hash]) => [key, requireBlob(blobs, hash)]))
+  const admitted = new Map(
+    Object.entries(observation.blobs).map(([hash, value]) => [Instructions.Hash.make(hash), value]),
+  )
+  return Instructions.renderUpdate(instructions, previous, dereferenceDelta(observation.delta, admitted))
+})
+
 export const prepare = Effect.fn("InstructionState.prepare")(function* (
   db: DatabaseService,
   bus: Bus.Interface,
   instructions: Instructions.Instructions,
   sessionID: SessionSchema.ID,
 ) {
-  yield* commit(db, bus, yield* observe(db, instructions, sessionID))
+  yield* commit(db, bus, instructions, yield* observe(db, instructions, sessionID))
 })
 
 export const apply = Effect.fn("InstructionState.apply")(function* (
@@ -140,79 +158,24 @@ export const reset = Effect.fn("InstructionState.reset")(function* (db: Database
     .pipe(Effect.orDie)
 })
 
-export const rebuild = Effect.fn("InstructionState.rebuild")(function* (
-  db: DatabaseService,
-  sessionID: SessionSchema.ID,
-) {
-  const state = yield* stateFromEvents(db, sessionID)
-  if (!state) {
-    yield* reset(db, sessionID)
-    return undefined
-  }
-  yield* db
-    .insert(InstructionStateTable)
-    .values(state)
-    .onConflictDoUpdate({
-      target: InstructionStateTable.session_id,
-      set: {
-        epoch_start: state.epoch_start,
-        through_seq: state.through_seq,
-        initial_values: state.initial_values,
-        current_values: state.current_values,
-      },
-    })
-    .run()
-    .pipe(Effect.orDie)
-  return state
-})
-
-const assembleState = Effect.fnUntraced(function* (
-  db: DatabaseService,
-  sessionID: SessionSchema.ID,
-  instructions: Instructions.Instructions,
-  state: typeof InstructionStateTable.$inferSelect,
-) {
-  const rows = yield* instructionUpdatesAfter(db, sessionID, state.epoch_start)
-  const updates = rows.map((row) => ({
-    row,
-    delta: decodeInstructionsUpdated(row.data).delta,
-  }))
-  const blobs = yield* loadBlobs(db, [
-    ...Object.values(state.initial_values),
-    ...updates.flatMap((update) =>
-      Object.values(update.delta).filter((hash): hash is Instructions.Hash => hash !== "removed"),
-    ),
-  ])
-  const valuesAtStart = dereference(state.initial_values, blobs)
-  let values = valuesAtStart
-  const result: Array<{ readonly seq: number; readonly message: SessionMessage.System }> = []
-  for (const update of updates) {
-    const delta = dereferenceDelta(update.delta, blobs)
-    const text = Instructions.renderUpdate(instructions, values, delta)
-    if (text.length > 0)
-      result.push({
-        seq: update.row.seq,
-        message: SessionMessage.System.make({
-          id: SessionMessage.ID.fromEvent(Event.ID.make(update.row.id)),
-          type: "system",
-          text,
-          time: { created: DateTime.makeUnsafe(update.row.created) },
-        }),
-      })
-    values = Instructions.applyDelta(values, delta)
-  }
-  return { initial: Instructions.renderInitial(instructions, valuesAtStart), updates: result, current: values }
-})
-
-export const assemble = Effect.fn("InstructionState.assemble")(function* (
+/** Renders the epoch baseline shown at the start of every model request. */
+export const initial = Effect.fn("InstructionState.initial")(function* (
   db: DatabaseService,
   sessionID: SessionSchema.ID,
   instructions: Instructions.Instructions,
 ) {
   const state = yield* find(db, sessionID)
   if (!state) return yield* Effect.die(new Error(`Instruction state not found during assembly: ${sessionID}`))
-  const assembled = yield* assembleState(db, sessionID, instructions, state)
-  return { initial: assembled.initial, updates: assembled.updates }
+  const blobs = yield* loadBlobs(db, Object.values(state.initial_values))
+  return Instructions.renderInitial(instructions, dereference(state.initial_values, blobs))
+})
+
+/** The current instruction values, used to seed a fork's baseline. */
+export const current = Effect.fn("InstructionState.current")(function* (
+  db: DatabaseService,
+  sessionID: SessionSchema.ID,
+) {
+  return (yield* find(db, sessionID))?.current_values
 })
 
 export const preview = Effect.fn("InstructionState.preview")(function* (
@@ -221,20 +184,26 @@ export const preview = Effect.fn("InstructionState.preview")(function* (
   instructions: Instructions.Instructions,
   observed: Instructions.ReadResult,
 ) {
-  const state = yield* readState(db, sessionID)
+  const state = yield* find(db, sessionID)
   const result = yield* observeAgainst(observed, state?.current_values)
-  const blobs = new Map<Instructions.Hash, Schema.Json>(
+  const observedBlobs = new Map<Instructions.Hash, Schema.Json>(
     Object.entries(result.blobs).map(([hash, value]) => [Instructions.Hash.make(hash), value]),
   )
   if (!state) {
-    const values = dereference(result.current, blobs)
-    return { initial: Instructions.renderInitial(instructions, values), updates: [], update: "" }
+    const values = dereference(result.current, observedBlobs)
+    return { initial: Instructions.renderInitial(instructions, values), update: "" }
   }
-  const assembled = yield* assembleState(db, sessionID, instructions, state)
+  const stored = yield* loadBlobs(db, [
+    ...Object.values(state.initial_values),
+    ...Object.values(state.current_values),
+  ])
   return {
-    initial: assembled.initial,
-    updates: assembled.updates,
-    update: Instructions.renderUpdate(instructions, assembled.current, dereferenceDelta(result.delta, blobs)),
+    initial: Instructions.renderInitial(instructions, dereference(state.initial_values, stored)),
+    update: Instructions.renderUpdate(
+      instructions,
+      dereference(state.current_values, stored),
+      dereferenceDelta(result.delta, new Map([...stored, ...observedBlobs])),
+    ),
   }
 })
 
@@ -255,46 +224,6 @@ const find = Effect.fnUntraced(function* (db: DatabaseService, sessionID: Sessio
     .pipe(Effect.orDie)
 })
 
-const ensure = Effect.fnUntraced(function* (db: DatabaseService, sessionID: SessionSchema.ID) {
-  const stored = yield* find(db, sessionID)
-  if (!stored) return yield* rebuild(db, sessionID)
-  const latest = yield* latestRelevantSequence(db, sessionID)
-  if (!latest || latest.seq <= stored.through_seq) return stored
-  return yield* rebuild(db, sessionID)
-})
-
-const readState = Effect.fnUntraced(function* (db: DatabaseService, sessionID: SessionSchema.ID) {
-  const stored = yield* find(db, sessionID)
-  if (!stored) return yield* stateFromEvents(db, sessionID)
-  const latest = yield* latestRelevantSequence(db, sessionID)
-  if (!latest || latest.seq <= stored.through_seq) return stored
-  return yield* stateFromEvents(db, sessionID)
-})
-
-const stateFromEvents = Effect.fnUntraced(function* (db: DatabaseService, sessionID: SessionSchema.ID) {
-  const folded = fold(yield* instructionEvents(db, sessionID))
-  return folded ? foldedState(sessionID, folded) : undefined
-})
-
-export const valuesAt = Effect.fn("InstructionState.valuesAt")(function* (
-  db: DatabaseService,
-  sessionID: SessionSchema.ID,
-  through: number,
-) {
-  return fold(yield* instructionEvents(db, sessionID, through))?.current
-})
-
-const latestRelevantSequence = Effect.fnUntraced(function* (db: DatabaseService, sessionID: SessionSchema.ID) {
-  return yield* db
-    .select({ seq: EventTable.seq })
-    .from(EventTable)
-    .where(and(eq(EventTable.aggregate_id, sessionID), inArray(EventTable.type, relevantEventTypes)))
-    .orderBy(desc(EventTable.seq))
-    .limit(1)
-    .get()
-    .pipe(Effect.orDie)
-})
-
 const insertBlobs = Effect.fnUntraced(function* (db: DatabaseService, blobs: Readonly<Record<string, Schema.Json>>) {
   const rows = Object.entries(blobs).map(([hash, value]) => ({ hash: Instructions.Hash.make(hash), value }))
   if (rows.length === 0) return
@@ -339,106 +268,3 @@ function requireBlob(blobs: ReadonlyMap<Instructions.Hash, Schema.Json>, hash: I
   if (value === undefined) throw new Error(`Instruction blob not found: ${hash}`)
   return value
 }
-
-const instructionEventType = Bus.versionedType(
-  SessionEvent.InstructionsUpdated.type,
-  SessionEvent.InstructionsUpdated.durable.version,
-)
-const compactionEventType = Bus.versionedType(
-  SessionEvent.Compaction.Ended.type,
-  SessionEvent.Compaction.Ended.durable.version,
-)
-const movedEventType = Bus.versionedType(SessionEvent.Moved.type, SessionEvent.Moved.durable.version)
-const revertedEventType = Bus.versionedType(
-  SessionEvent.RevertEvent.Committed.type,
-  SessionEvent.RevertEvent.Committed.durable.version,
-)
-const forkedEventType = Bus.versionedType(SessionEvent.Forked.type, SessionEvent.Forked.durable.version)
-const relevantEventTypes = [
-  forkedEventType,
-  instructionEventType,
-  compactionEventType,
-  movedEventType,
-  revertedEventType,
-]
-
-type InstructionEventRow = typeof EventTable.$inferSelect
-
-const instructionEvents = Effect.fnUntraced(function* (
-  db: DatabaseService,
-  sessionID: SessionSchema.ID,
-  through?: number,
-): Effect.fn.Return<ReadonlyArray<InstructionEventRow>> {
-  return yield* eventRows(db, sessionID, relevantEventTypes, undefined, through)
-})
-
-const instructionUpdatesAfter = Effect.fnUntraced(function* (
-  db: DatabaseService,
-  sessionID: SessionSchema.ID,
-  after: number,
-) {
-  return yield* eventRows(db, sessionID, [instructionEventType], after)
-})
-
-const eventRows = Effect.fnUntraced(function* (
-  db: DatabaseService,
-  sessionID: SessionSchema.ID,
-  types: ReadonlyArray<string>,
-  after?: number,
-  through?: number,
-): Effect.fn.Return<ReadonlyArray<InstructionEventRow>> {
-  return yield* db
-    .select()
-    .from(EventTable)
-    .where(
-      and(
-        eq(EventTable.aggregate_id, sessionID),
-        inArray(EventTable.type, types),
-        after === undefined ? undefined : gt(EventTable.seq, after),
-        through === undefined ? undefined : lte(EventTable.seq, through),
-      ),
-    )
-    .orderBy(asc(EventTable.seq))
-    .all()
-    .pipe(Effect.orDie)
-})
-
-function fold(rows: ReadonlyArray<InstructionEventRow>) {
-  return rows.reduce<
-    | {
-        readonly epochStart: number
-        readonly throughSeq: number
-        readonly initial: Instructions.Values
-        readonly current: Instructions.Values
-      }
-    | undefined
-  >((state, row) => {
-    if (row.type === forkedEventType) {
-      const instructions = decodeForked(row.data).instructions
-      return instructions
-        ? { epochStart: row.seq, throughSeq: row.seq, initial: instructions, current: instructions }
-        : undefined
-    }
-    if (row.type === movedEventType || row.type === revertedEventType) return undefined
-    if (row.type === compactionEventType)
-      return state
-        ? { epochStart: row.seq, throughSeq: row.seq, initial: state.current, current: state.current }
-        : undefined
-    if (row.type !== instructionEventType) return state
-    const delta = decodeInstructionsUpdated(row.data).delta
-    const current = Instructions.applyHashDelta(state?.current ?? {}, delta)
-    return state
-      ? { ...state, throughSeq: row.seq, current }
-      : { epochStart: row.seq, throughSeq: row.seq, initial: current, current }
-  }, undefined)
-}
-
-function foldedState(sessionID: SessionSchema.ID, folded: NonNullable<ReturnType<typeof fold>>) {
-  return {
-    session_id: sessionID,
-    epoch_start: folded.epochStart,
-    through_seq: folded.throughSeq,
-    initial_values: folded.initial,
-    current_values: folded.current,
-  }
-}

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

@@ -1,12 +1,8 @@
 import { castDraft, produce, type WritableDraft } from "immer"
-import { DateTime, Effect } from "effect"
+import { DateTime, Effect, Match, pipe } from "effect"
 import { SessionEvent } from "./event"
 import { SessionMessage } from "./message"
 
-export type MemoryState = {
-  messages: SessionMessage.Info[]
-}
-
 export interface Adapter {
   readonly getModel: () => Effect.Effect<SessionMessage.ModelSelected["model"] | undefined, never, never>
   readonly getCurrentAssistant: () => Effect.Effect<SessionMessage.Assistant | undefined, never, never>
@@ -23,89 +19,7 @@ export interface Adapter {
   readonly appendMessage: (message: SessionMessage.Info) => Effect.Effect<void, never, never>
 }
 
-export function memory(state: MemoryState): Adapter {
-  const assistantIndex = (messageID: SessionMessage.ID) =>
-    state.messages.findLastIndex((message) => message.id === messageID)
-  const shellIndex = (messageID: SessionMessage.ID) =>
-    state.messages.findLastIndex((message) => message.id === messageID)
-  const compactionIndex = () =>
-    state.messages.findLastIndex((message) => message.type === "compaction" && message.status === "running")
-  // A newer step supersedes stale incomplete rows; never resume an older assistant projection.
-  const latestAssistantIndex = () => state.messages.findLastIndex((message) => message.type === "assistant")
-
-  return {
-    getModel() {
-      return Effect.sync(
-        () =>
-          state.messages.findLast(
-            (message): message is SessionMessage.ModelSelected | SessionMessage.Assistant =>
-              message.type === "model-switched" || message.type === "assistant",
-          )?.model,
-      )
-    },
-    getCurrentAssistant() {
-      return Effect.sync(() => {
-        const index = latestAssistantIndex()
-        if (index < 0) return
-        const assistant = state.messages[index]
-        return assistant?.type === "assistant" && !assistant.time.completed ? assistant : undefined
-      })
-    },
-    getAssistant(messageID) {
-      return Effect.sync(() => {
-        const index = assistantIndex(messageID)
-        if (index < 0) return
-        const assistant = state.messages[index]
-        return assistant?.type === "assistant" ? assistant : undefined
-      })
-    },
-    getShell(shellID) {
-      return Effect.sync(() => {
-        return state.messages.find((message): message is SessionMessage.Shell => {
-          return message.type === "shell" && message.shellID === shellID
-        })
-      })
-    },
-    getCompaction() {
-      return Effect.sync(() => {
-        const index = compactionIndex()
-        const message = state.messages[index]
-        return message?.type === "compaction" ? message : undefined
-      })
-    },
-    updateAssistant(assistant) {
-      return Effect.sync(() => {
-        const index = assistantIndex(assistant.id)
-        if (index < 0) return
-        const current = state.messages[index]
-        if (current?.type !== "assistant") return
-        state.messages[index] = assistant
-      })
-    },
-    updateShell(shell) {
-      return Effect.sync(() => {
-        const index = shellIndex(shell.id)
-        if (index < 0) return
-        const current = state.messages[index]
-        if (current?.type !== "shell") return
-        state.messages[index] = shell
-      })
-    },
-    updateCompaction(compaction) {
-      return Effect.sync(() => {
-        const index = state.messages.findLastIndex((message) => message.id === compaction.id)
-        if (index >= 0) state.messages[index] = compaction
-      })
-    },
-    appendMessage(message) {
-      return Effect.sync(() => {
-        state.messages.push(message)
-      })
-    },
-  }
-}
-
-export function update(adapter: Adapter, event: SessionEvent.Event) {
+export function update(adapter: Adapter, event: SessionEvent.DurableEvent) {
   type DraftAssistant = WritableDraft<SessionMessage.Assistant>
   type DraftTool = WritableDraft<SessionMessage.AssistantTool>
   type DraftText = WritableDraft<SessionMessage.AssistantText>
@@ -139,9 +53,9 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
     }
   })
 
-  return Effect.gen(function* () {
-    yield* SessionEvent.All.match(event, {
-      "session.usage.updated": () => Effect.void,
+  const project = pipe(
+    Match.type<SessionEvent.DurableEvent>(),
+    Match.discriminatorsExhaustive("type")({
       "session.usage.recorded": () => Effect.void,
       "session.agent.selected": (event) => {
         return adapter.appendMessage(
@@ -179,7 +93,18 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
       "session.execution.succeeded": () => clearCurrentRetry,
       "session.execution.failed": () => clearCurrentRetry,
       "session.execution.interrupted": () => clearCurrentRetry,
-      "session.instructions.updated": () => Effect.void,
+      "session.instructions.updated": (event) => {
+        if (event.data.text === undefined) return Effect.void
+        return adapter.appendMessage(
+          SessionMessage.System.make({
+            id: SessionMessage.ID.fromEvent(event.id),
+            type: "system",
+            text: event.data.text,
+            metadata: event.metadata,
+            time: { created: event.created },
+          }),
+        )
+      },
       "session.synthetic": (event) => {
         return adapter.appendMessage(
           SessionMessage.Synthetic.make({
@@ -310,12 +235,6 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
           draft.content.push(castDraft(SessionMessage.AssistantText.make({ type: "text", text: "" })))
         })
       },
-      "session.text.delta": (event) => {
-        return updateOwnedAssistant(event.data.assistantMessageID, (draft) => {
-          const match = latestText(draft)
-          if (match) match.text += event.data.delta
-        })
-      },
       "session.text.ended": (event) => {
         return updateOwnedAssistant(event.data.assistantMessageID, (draft) => {
           const match = latestText(draft)
@@ -340,7 +259,6 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
           )
         })
       },
-      "session.tool.input.delta": () => Effect.void,
       "session.tool.input.ended": (event) => {
         return updateOwnedAssistant(event.data.assistantMessageID, (draft) => {
           const match = latestTool(draft, event.data.id)
@@ -364,14 +282,6 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
           }
         })
       },
-      "session.tool.progress": (event) => {
-        return updateOwnedAssistant(event.data.assistantMessageID, (draft) => {
-          const match = latestTool(draft, event.data.id)
-          if (match && match.state.status === "running") {
-            match.state.metadata = event.data.metadata
-          }
-        })
-      },
       // Terminal tool events are self-contained; projection is a direct copy and
       // never reaches into ephemeral progress history.
       "session.tool.success": (event) => {
@@ -425,12 +335,6 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
           )
         })
       },
-      "session.reasoning.delta": (event) => {
-        return updateOwnedAssistant(event.data.assistantMessageID, (draft) => {
-          const match = latestReasoning(draft)
-          if (match) match.text += event.data.delta
-        })
-      },
       "session.reasoning.ended": (event) => {
         return updateOwnedAssistant(event.data.assistantMessageID, (draft) => {
           const match = latestReasoning(draft)
@@ -464,12 +368,6 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
             time: { created: event.created },
           }),
         ),
-      "session.compaction.delta": (event) =>
-        Effect.gen(function* () {
-          const current = yield* adapter.getCompaction()
-          if (current?.status !== "running") return
-          yield* adapter.updateCompaction({ ...current, summary: current.summary + event.data.text })
-        }),
       "session.compaction.ended": (event) => {
         return Effect.gen(function* () {
           const current = yield* adapter.getCompaction()
@@ -515,8 +413,9 @@ export function update(adapter: Adapter, event: SessionEvent.Event) {
       "session.revert.staged": () => Effect.void,
       "session.revert.cleared": () => Effect.void,
       "session.revert.committed": () => Effect.void,
-    })
-  })
+    }),
+  )
+  return project(event)
 }
 
 export * as SessionMessageUpdater from "./message-updater"

packages/core/src/session/pending.ts

@@ -12,10 +12,8 @@ import {
   User,
   UserData,
 } from "@opencode-ai/schema/session-pending"
-import { Event } from "@opencode-ai/schema/event"
 import type { Database } from "../database/database"
 import { Bus } from "../bus"
-import { EventTable } from "../event/sql"
 import { KeyedMutex } from "../effect/keyed-mutex"
 import { SessionEvent } from "./event"
 import { SessionMessage } from "./message"
@@ -37,11 +35,7 @@ const decodeUser = Schema.decodeUnknownSync(UserData)
 const encodeUser = Schema.encodeSync(UserData)
 const decodeSynthetic = Schema.decodeUnknownSync(SyntheticData)
 const encodeSynthetic = Schema.encodeSync(SyntheticData)
-const decodeAdmittedEvent = Schema.decodeUnknownOption(SessionEvent.InputAdmitted.data)
-const admittedEventType = Bus.versionedType(
-  SessionEvent.InputAdmitted.type,
-  SessionEvent.InputAdmitted.durable.version,
-)
+const decodeMessage = Schema.decodeUnknownSync(SessionMessage.Info)
 const inboxLocks = KeyedMutex.makeUnsafe<SessionSchema.ID>()
 
 export class LifecycleConflict extends Schema.TaggedErrorClass<LifecycleConflict>()(
@@ -103,46 +97,35 @@ export const compaction = Effect.fn("SessionPending.compaction")(function* (
   return entry.type === "compaction" ? entry : undefined
 })
 
-/**
- * Reconstruct the admitted record for a pending row that was already consumed
- * by promotion. The projected `session_message` row proves promotion happened;
- * the durable `session.input.admitted` event retains the exact admitted
- * message, including delivery.
- */
-const promotedFromHistory = Effect.fn("SessionPending.promotedFromHistory")(function* (
+const promotedFromMessage = Effect.fn("SessionPending.promotedFromMessage")(function* (
   db: DatabaseService,
   sessionID: SessionSchema.ID,
   id: SessionMessage.ID,
+  delivery: Delivery,
 ) {
-  const message = yield* db
+  const row = yield* db
     .select()
     .from(SessionMessageTable)
     .where(eq(SessionMessageTable.id, id))
     .get()
     .pipe(Effect.orDie)
-  if (message === undefined) return undefined
-  if (message.session_id !== sessionID || (message.type !== "user" && message.type !== "synthetic"))
+  if (row === undefined) return undefined
+  if (row.session_id !== sessionID || (row.type !== "user" && row.type !== "synthetic"))
     return yield* Effect.die(new LifecycleConflict({ id }))
-  const rows = yield* db
-    .select()
-    .from(EventTable)
-    .where(and(eq(EventTable.aggregate_id, sessionID), eq(EventTable.type, admittedEventType)))
-    .all()
-    .pipe(Effect.orDie)
-  for (const row of rows) {
-    const decoded = decodeAdmittedEvent(row.data)
-    if (decoded._tag !== "Some" || decoded.value.inputID !== id) continue
-    const base = {
-      id,
-      sessionID,
-      timeCreated: DateTime.makeUnsafe(row.created),
-    }
-    return decoded.value.input.type === "user"
-      ? User.make({ ...base, ...decoded.value.input })
-      : Synthetic.make({ ...base, ...decoded.value.input })
-  }
-  // A projected message without an admitted event in this aggregate (for
-  // example fork-copied history) is not a retryable admission.
+  const message = decodeMessage({ ...row.data, id: row.id, type: row.type })
+  const base = { id, sessionID, timeCreated: message.time.created, delivery }
+  if (message.type === "user")
+    return User.make({
+      ...base,
+      type: "user",
+      data: decodeUser(message),
+    })
+  if (message.type === "synthetic")
+    return Synthetic.make({
+      ...base,
+      type: "synthetic",
+      data: decodeSynthetic(message),
+    })
   return yield* Effect.die(new LifecycleConflict({ id }))
 })
 
@@ -160,7 +143,7 @@ export const admit = Effect.fn("SessionPending.admit")(function* (
     if (existing.type === "compaction") return yield* Effect.die(new LifecycleConflict({ id: request.id }))
     return existing
   }
-  const promoted = yield* promotedFromHistory(db, request.sessionID, request.id)
+  const promoted = yield* promotedFromMessage(db, request.sessionID, request.id, request.input.delivery)
   if (promoted !== undefined) return promoted
   return yield* bus
     .publish(SessionEvent.InputAdmitted, {
@@ -426,7 +409,7 @@ const publish = Effect.fn("SessionPending.publish")(function* (
         .pipe(
           Effect.catchDefect((defect) =>
             defect instanceof LifecycleConflict
-              ? promotedFromHistory(db, sessionID, entry.id).pipe(
+              ? promotedFromMessage(db, sessionID, entry.id, entry.delivery).pipe(
                   Effect.flatMap((stored) => (stored !== undefined ? Effect.void : Effect.die(defect))),
                 )
               : Effect.die(defect),

packages/core/src/session/projector.ts

@@ -1,6 +1,6 @@
 export * as SessionProjector from "./projector"
 
-import { and, asc, desc, eq, gt, gte, inArray, lt, lte, sql } from "drizzle-orm"
+import { and, asc, desc, eq, gt, gte, lt, lte, sql } from "drizzle-orm"
 import { DateTime, Effect, Layer, Schema, Stream } from "effect"
 import { Database } from "../database/database"
 import { Bus } from "../bus"
@@ -21,10 +21,7 @@ import { Money } from "@opencode-ai/schema/money"
 
 type DatabaseService = Database.Interface["db"]
 type CurrentDurableEvent = Extract<SessionEvent.Event, { readonly durable: object }>
-type MessageEvent = Exclude<
-  CurrentDurableEvent,
-  typeof SessionEvent.Forked.Type | typeof SessionEvent.Deleted.Type | typeof SessionEvent.InstructionsUpdated.Type
->
+type MessageEvent = Exclude<CurrentDurableEvent, typeof SessionEvent.Forked.Type | typeof SessionEvent.Deleted.Type>
 
 const decodeMessage = Schema.decodeUnknownSync(SessionMessage.Info)
 const encodeMessage = Schema.encodeSync(SessionMessage.Info)
@@ -255,66 +252,22 @@ const projectFork = Effect.fn("SessionProjector.projectFork")(function* (
       .pipe(Effect.orDie)
     if (rows.length === 0) break
 
-    const idMap = new Map(rows.map((row) => [row.id, SessionMessage.ID.create()]))
     yield* db
       .insert(SessionMessageTable)
       .values(
-        rows.map((row) => {
-          const id = idMap.get(row.id)
-          if (!id) throw new Error(`Fork message ID mapping missing: ${row.id}`)
-          return {
-            id,
-            session_id: event.data.sessionID,
-            type: row.type,
-            seq: row.seq,
-            time_created: row.time_created,
-            time_updated: row.time_updated,
-            data: row.data,
-          }
-        }),
+        rows.map((row) => ({
+          id: SessionMessage.ID.create(),
+          session_id: event.data.sessionID,
+          type: row.type,
+          seq: row.seq,
+          time_created: row.time_created,
+          time_updated: row.time_updated,
+          data: row.data,
+        })),
       )
       .run()
       .pipe(Effect.orDie)
 
-    const pendingRows = yield* db
-      .select()
-      .from(SessionPendingTable)
-      .where(
-        and(
-          eq(SessionPendingTable.session_id, event.data.parentID),
-          inArray(
-            SessionPendingTable.id,
-            rows.map((row) => row.id),
-          ),
-        ),
-      )
-      .all()
-      .pipe(Effect.orDie)
-    if (pendingRows.length > 0) {
-      yield* db
-        .insert(SessionPendingTable)
-        .values(
-          pendingRows.flatMap((row) => {
-            const id = idMap.get(row.id)
-            return id && row.type !== "compaction"
-              ? [
-                  {
-                    id,
-                    session_id: event.data.sessionID,
-                    type: row.type,
-                    data: row.data,
-                    delivery: row.delivery,
-                    admitted_seq: row.admitted_seq,
-                    time_created: row.time_created,
-                  },
-                ]
-              : []
-          }),
-        )
-        .run()
-        .pipe(Effect.orDie)
-    }
-
     cursor = rows.at(-1)!.seq
   }
   if (copiedSeq !== undefined) yield* Bus.reserveSequence(db, event.data.sessionID, copiedSeq)
@@ -682,7 +635,10 @@ const layer = Layer.effectDiscard(
     yield* bus.project(SessionEvent.Execution.Failed, (event) => run(db, event))
     yield* bus.project(SessionEvent.Execution.Interrupted, (event) => run(db, event))
     yield* bus.project(SessionEvent.InstructionsUpdated, (event) =>
-      InstructionState.apply(db, event.data.sessionID, event.durable.seq, event.data.delta),
+      Effect.gen(function* () {
+        yield* run(db, event)
+        yield* InstructionState.apply(db, event.data.sessionID, event.durable.seq, event.data.delta)
+      }),
     )
     yield* bus.project(SessionEvent.Synthetic, (event) => run(db, event))
     yield* bus.project(SessionEvent.Skill.Activated, (event) => run(db, event))

packages/core/src/shell/select.ts

@@ -1,15 +1,12 @@
 export * as ShellSelect from "./select"
 
 import path from "path"
-import { spawn, type ChildProcess } from "child_process"
 import { readFile } from "fs/promises"
 import { statSync } from "fs"
-import { setTimeout } from "node:timers/promises"
 import { Schema } from "effect"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { which } from "../util/which"
 
-const SIGKILL_TIMEOUT_MS = 200
 const META: Record<string, { deny?: boolean; login?: boolean; posix?: boolean; ps?: boolean }> = {
   bash: { login: true, posix: true },
   dash: { login: true, posix: true },
@@ -33,37 +30,6 @@ export const Options = Schema.Struct({
 })
 export type Options = typeof Options.Type
 
-export async function killTree(proc: ChildProcess, opts?: { exited?: () => boolean }): Promise<void> {
-  const pid = proc.pid
-  if (!pid || opts?.exited?.()) return
-
-  if (process.platform === "win32") {
-    await new Promise<void>((resolve) => {
-      const killer = spawn("taskkill", ["/pid", String(pid), "/f", "/t"], {
-        stdio: "ignore",
-        windowsHide: true,
-      })
-      killer.once("exit", () => resolve())
-      killer.once("error", () => resolve())
-    })
-    return
-  }
-
-  try {
-    process.kill(-pid, "SIGTERM")
-    await setTimeout(SIGKILL_TIMEOUT_MS)
-    if (!opts?.exited?.()) {
-      process.kill(-pid, "SIGKILL")
-    }
-  } catch {
-    proc.kill("SIGTERM")
-    await setTimeout(SIGKILL_TIMEOUT_MS)
-    if (!opts?.exited?.()) {
-      proc.kill("SIGKILL")
-    }
-  }
-}
-
 function stat(file: string) {
   return statSync(file, { throwIfNoEntry: false }) ?? undefined
 }

packages/core/src/snapshot.ts

@@ -16,7 +16,7 @@ import { Hash } from "@opencode-ai/util/hash"
 export { ID }
 
 export class Error extends Schema.TaggedErrorClass<Error>()("Snapshot.Error", {
-  operation: Schema.Literals(["capture", "files", "diff", "preview", "restore"]),
+  operation: Schema.Literals(["capture", "files", "diff", "restore"]),
   message: Schema.String,
   cause: Schema.optional(Schema.Defect()),
 }) {}
@@ -36,10 +36,6 @@ export interface RestoreInput {
   readonly files: ReadonlyMap<RelativePath, ID>
 }
 
-export interface PreviewInput extends RestoreInput {
-  readonly context?: number
-}
-
 export interface Interface {
   /**
    * Capture the current Location-scoped filesystem state as a content-addressed
@@ -60,25 +56,11 @@ export interface Interface {
    */
   readonly diff: (input: DiffInput) => Effect.Effect<readonly File.Diff[], Error>
 
-  /**
-   * Preview the filesystem result of a selective restore without modifying the
-   * worktree. Each project-relative path maps to the tree it would be restored
-   * from.
-   */
-  readonly preview: (input: PreviewInput) => Effect.Effect<readonly File.Diff[], Error>
-
   /**
    * Restore selected project-relative paths from their associated trees. A path
    * absent from its selected tree is removed; paths outside the map are untouched.
-   */
+  */
   readonly restore: (input: RestoreInput) => Effect.Effect<void, Error>
-
-  /**
-   * Replace the snapshot index with a captured tree and check out all its entries.
-   * Files absent from the tree remain untouched. Prefer selective `restore` when
-   * only known paths should change.
-   */
-  readonly checkout: (snapshot: ID) => Effect.Effect<void, Error>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/Snapshot") {}
@@ -176,59 +158,26 @@ const layer = Layer.effect(
         .pipe(Effect.mapError((cause) => failure("diff", cause)))
     })
 
-    const plan = Effect.fnUntraced(function* (
-      operation: "preview" | "restore",
-      worktree: AbsolutePath,
-      input: RestoreInput,
-    ) {
+    const plan = Effect.fnUntraced(function* (worktree: AbsolutePath, input: RestoreInput) {
       const files = new Map<RelativePath, Git.TreeID>()
       for (const [file, snapshot] of input.files) {
         const absolute = path.resolve(worktree, file)
         if (!FSUtil.contains(worktree, absolute))
-          return yield* new Error({ operation, message: `Path escapes the project: ${file}` })
+          return yield* new Error({ operation: "restore", message: `Path escapes the project: ${file}` })
         files.set(file, Git.TreeID.make(snapshot))
       }
       return files
     })
 
-    const preview = Effect.fn("Snapshot.preview")(function* (input: PreviewInput) {
-      if (!(yield* enabled())) return yield* new Error({ operation: "preview", message: "Snapshots are disabled" })
-      const repo = yield* repository.pipe(Effect.mapError((cause) => failure("preview", cause)))
-      const files = yield* plan("preview", repo.worktree, input)
-      const current = yield* git.tree
-        .capture({
-          repository: repo.snapshotRepository,
-          scopes: Array.from(files.keys()),
-          ignores: repo.source,
-          maximumUntrackedFileBytes: 2 * 1024 * 1024,
-        })
-        .pipe(Effect.mapError((cause) => failure("preview", cause)))
-      return yield* git.tree
-        .preview({
-          repository: repo.snapshotRepository,
-          current,
-          files,
-          context: input.context,
-        })
-        .pipe(Effect.mapError((cause) => failure("preview", cause)))
-    })
-
     const restore = Effect.fn("Snapshot.restore")(function* (input: RestoreInput) {
       if (!(yield* enabled())) return yield* new Error({ operation: "restore", message: "Snapshots are disabled" })
       const repo = yield* repository.pipe(Effect.mapError((cause) => failure("restore", cause)))
       yield* git.tree
-        .restore({ repository: repo.snapshotRepository, files: yield* plan("restore", repo.worktree, input) })
+        .restore({ repository: repo.snapshotRepository, files: yield* plan(repo.worktree, input) })
         .pipe(Effect.mapError((cause) => failure("restore", cause)))
     })
 
-    const checkout = Effect.fn("Snapshot.checkout")(function* (snapshot: ID) {
-      const repo = yield* repository.pipe(Effect.mapError((cause) => failure("restore", cause)))
-      yield* git.tree
-        .checkout({ repository: repo.snapshotRepository, tree: Git.TreeID.make(snapshot) })
-        .pipe(Effect.mapError((cause) => failure("restore", cause)))
-    })
-
-    return Service.of({ capture, files, diff, preview, restore, checkout })
+    return Service.of({ capture, files, diff, restore })
   }).pipe(Effect.withSpan("Snapshot.boot")),
 )
 
@@ -244,9 +193,7 @@ export const noopLayer = Layer.succeed(
     capture: () => Effect.succeed(undefined),
     files: () => Effect.succeed([]),
     diff: () => Effect.succeed([]),
-    preview: () => Effect.succeed([]),
     restore: () => Effect.void,
-    checkout: () => Effect.void,
   }),
 )
 

packages/core/test/bus.test.ts

@@ -1298,24 +1298,4 @@ describe("Bus", () => {
     }),
   )
 
-  it.effect("sequences returns the latest committed seq per aggregate and omits unknown aggregates", () =>
-    Effect.gen(function* () {
-      const bus = yield* Bus.Service
-      const first = Session.ID.create()
-      const second = Session.ID.create()
-      yield* bus.publish(DurableMessage, durableData(first, "zero"))
-      yield* bus.publish(DurableMessage, durableData(first, "one"))
-      yield* bus.publish(DurableMessage, durableData(second, "zero"))
-
-      const sequences = yield* bus.sequences([first, second, Session.ID.create()])
-
-      expect(sequences).toEqual(
-        new Map([
-          [first, Event.Seq.make(1)],
-          [second, Event.Seq.make(0)],
-        ]),
-      )
-      expect(yield* bus.sequences([])).toEqual(new Map())
-    }),
-  )
 })

packages/core/test/effect/layer-node/node-build.test.ts

@@ -80,7 +80,6 @@ describe("node build", () => {
           list: () => Effect.succeed([]),
           directories: () => Effect.succeed([]),
           resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
-          commit: () => Effect.void,
         })
       }),
     )

packages/core/test/file-mutation.test.ts

@@ -89,68 +89,6 @@ describe("FileMutation", () => {
     ),
   )
 
-  it.live("rejects create when a prospective target appears after resolution", () =>
-    withTmp((directory) =>
-      Effect.gen(function* () {
-        const targetPath = path.join(directory, "appeared.txt")
-        const target = yield* (yield* LocationMutation.Service).resolve({ path: "appeared.txt" })
-        yield* Effect.promise(() => fs.writeFile(targetPath, "winner"))
-
-        expect(
-          yield* (yield* FileMutation.Service).create({ target, content: "replacement" }).pipe(Effect.flip),
-        ).toMatchObject({
-          _tag: "FileMutation.TargetExistsError",
-        })
-        expect(yield* Effect.promise(() => fs.readFile(targetPath, "utf8"))).toBe("winner")
-      }).pipe(provide(directory)),
-    ),
-  )
-
-  it.live("creates when an existing target disappears after resolution", () =>
-    withTmp((directory) =>
-      Effect.gen(function* () {
-        const targetPath = path.join(directory, "removed.txt")
-        yield* Effect.promise(() => fs.writeFile(targetPath, "before"))
-        const target = yield* (yield* LocationMutation.Service).resolve({ path: "removed.txt" })
-        yield* Effect.promise(() => fs.rm(targetPath))
-
-        expect(yield* (yield* FileMutation.Service).create({ target, content: "after" })).toEqual({
-          operation: "write",
-          target: target.canonical,
-          resource: "removed.txt",
-          existed: false,
-        })
-        expect(yield* Effect.promise(() => fs.readFile(targetPath, "utf8"))).toBe("after")
-      }).pipe(provide(directory)),
-    ),
-  )
-
-  it.live("removes an existing internal file", () =>
-    withTmp((directory) =>
-      Effect.gen(function* () {
-        const targetPath = path.join(directory, "remove.txt")
-        yield* Effect.promise(() => fs.writeFile(targetPath, "remove"))
-        const target = yield* (yield* LocationMutation.Service).resolve({ path: "remove.txt" })
-        const result = yield* (yield* FileMutation.Service).remove({ target })
-
-        expect(result).toEqual({
-          operation: "remove",
-          target: target.canonical,
-          resource: "remove.txt",
-          existed: true,
-        })
-        expect(
-          yield* Effect.promise(() =>
-            fs.stat(targetPath).then(
-              () => true,
-              () => false,
-            ),
-          ),
-        ).toBe(false)
-      }).pipe(provide(directory)),
-    ),
-  )
-
   it.live("writes an explicitly resolved external target", () =>
     withTmp((directory) =>
       withTmp((outside) =>
@@ -171,49 +109,6 @@ describe("FileMutation", () => {
     ),
   )
 
-  it.live("removes an explicitly resolved external target", () =>
-    withTmp((directory) =>
-      withTmp((outside) =>
-        Effect.gen(function* () {
-          const targetPath = path.join(outside, "external.txt")
-          yield* Effect.promise(() => fs.writeFile(targetPath, "external"))
-          const target = yield* (yield* LocationMutation.Service).resolve({ path: targetPath })
-          const result = yield* (yield* FileMutation.Service).remove({ target })
-
-          expect(result).toEqual({
-            operation: "remove",
-            target: target.canonical,
-            resource: target.resource,
-            existed: true,
-          })
-          expect(
-            yield* Effect.promise(() =>
-              fs.stat(targetPath).then(
-                () => true,
-                () => false,
-              ),
-            ),
-          ).toBe(false)
-        }).pipe(provide(directory)),
-      ),
-    ),
-  )
-
-  it.live("reports a missing target as not removed without checking existence first", () =>
-    withTmp((directory) =>
-      Effect.gen(function* () {
-        const target = yield* (yield* LocationMutation.Service).resolve({ path: "missing.txt" })
-
-        expect(yield* (yield* FileMutation.Service).remove({ target })).toEqual({
-          operation: "remove",
-          target: target.canonical,
-          resource: "missing.txt",
-          existed: false,
-        })
-      }).pipe(provide(directory)),
-    ),
-  )
-
   it.live("serializes concurrent writes to the same canonical target", () =>
     withTmp((directory) =>
       Effect.gen(function* () {
@@ -257,63 +152,6 @@ describe("FileMutation", () => {
     ),
   )
 
-  it.live("allows only one concurrent conditional write based on the same bytes", () =>
-    withTmp((directory) =>
-      Effect.gen(function* () {
-        const targetPath = path.join(directory, "shared.txt")
-        yield* Effect.promise(() => fs.writeFile(targetPath, "initial"))
-        const firstStarted = yield* Deferred.make<void>()
-        const releaseFirst = yield* Deferred.make<void>()
-        let writes = 0
-        const filesystem = instrumentWrites((write) =>
-          Effect.gen(function* () {
-            writes++
-            if (writes === 1) {
-              yield* Deferred.succeed(firstStarted, undefined)
-              yield* Deferred.await(releaseFirst)
-            }
-            yield* write
-          }),
-        )
-
-        yield* Effect.gen(function* () {
-          const mutation = yield* LocationMutation.Service
-          const files = yield* FileMutation.Service
-          const target = yield* mutation.resolve({ path: "shared.txt" })
-          const expected = new TextEncoder().encode("initial")
-          const first = yield* files.writeIfUnchanged({ target, expected, content: "first" }).pipe(Effect.forkChild)
-          yield* Deferred.await(firstStarted)
-          const second = yield* files
-            .writeIfUnchanged({ target, expected, content: "second" })
-            .pipe(Effect.flip, Effect.forkChild)
-
-          yield* Deferred.succeed(releaseFirst, undefined)
-          yield* Fiber.join(first)
-          expect(yield* Fiber.join(second)).toMatchObject({ _tag: "FileMutation.StaleContentError" })
-          expect(yield* Effect.promise(() => fs.readFile(targetPath, "utf8"))).toBe("first")
-          expect(writes).toBe(1)
-        }).pipe(provide(directory, filesystem))
-      }),
-    ),
-  )
-
-  it.live("rejects a conditional write when target content is already stale", () =>
-    withTmp((directory) =>
-      Effect.gen(function* () {
-        const targetPath = path.join(directory, "stale.txt")
-        yield* Effect.promise(() => fs.writeFile(targetPath, "current"))
-        const target = yield* (yield* LocationMutation.Service).resolve({ path: "stale.txt" })
-
-        expect(
-          yield* (yield* FileMutation.Service)
-            .writeIfUnchanged({ target, expected: new TextEncoder().encode("older"), content: "replacement" })
-            .pipe(Effect.flip),
-        ).toMatchObject({ _tag: "FileMutation.StaleContentError", path: target.canonical })
-        expect(yield* Effect.promise(() => fs.readFile(targetPath, "utf8"))).toBe("current")
-      }).pipe(provide(directory)),
-    ),
-  )
-
   it.live("allows distinct canonical targets to proceed independently", () =>
     withTmp((directory) =>
       Effect.gen(function* () {

packages/core/test/filesystem/search.test.ts

@@ -1,44 +1,59 @@
-import { describe, expect } from "bun:test"
-import fs from "fs/promises"
+import { describe, expect, test } from "bun:test"
+import os from "os"
 import path from "path"
-import { Effect } from "effect"
-import { LayerNode } from "@opencode-ai/util/effect/layer-node"
+import { Effect, Layer } from "effect"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { FileSystem } from "@opencode-ai/core/filesystem"
+import { Protected } from "@opencode-ai/core/filesystem/protected"
+import { FileSystemSearch } from "@opencode-ai/core/filesystem/search"
+import { Location } from "@opencode-ai/core/location"
 import { Ripgrep } from "@opencode-ai/core/ripgrep"
 import { AbsolutePath, RelativePath } from "@opencode-ai/core/schema"
-import { tmpdir } from "../fixture/tmpdir"
-import { testEffect } from "../lib/effect"
+import { location } from "../fixture/location"
 
-const it = testEffect(LayerNode.compile(Ripgrep.node))
+describe("FileSystemSearch", () => {
+  test("bounds a home scan even when home is detected as a repository", async () => {
+    let observed: Ripgrep.FindInput | undefined
+    const home = AbsolutePath.make(os.homedir())
+    const layer = AppNodeBuilder.build(FileSystemSearch.node, [
+      [
+        Location.node,
+        Layer.succeed(
+          Location.Service,
+          Location.Service.of(
+            location({ directory: home }, { vcs: { type: "git", store: AbsolutePath.make(path.join(home, ".git")) } }),
+          ),
+        ),
+      ],
+      [
+        Ripgrep.node,
+        Layer.succeed(
+          Ripgrep.Service,
+          Ripgrep.Service.of({
+            find: (input) =>
+              Effect.gen(function* () {
+                observed = input
+                if (input.onEntry)
+                  yield* input.onEntry(FileSystem.Entry.make({ path: RelativePath.make("src/index.ts"), type: "file" }))
+                return []
+              }),
+            glob: () => Effect.succeed([]),
+            grep: () => Effect.succeed([]),
+          }),
+        ),
+      ],
+    ])
 
-const withTmp = <A, E, R>(f: (directory: AbsolutePath) => Effect.Effect<A, E, R>) =>
-  Effect.acquireRelease(
-    Effect.promise(() => tmpdir()),
-    (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-  ).pipe(Effect.flatMap((tmp) => f(AbsolutePath.make(tmp.path))))
-
-describe("Ripgrep", () => {
-  it.live("globs files as an array", () =>
-    withTmp((cwd) =>
+    await Effect.runPromise(
       Effect.gen(function* () {
-        yield* Effect.promise(() => fs.mkdir(path.join(cwd, "src")))
-        yield* Effect.promise(() => fs.writeFile(path.join(cwd, "src", "match.ts"), "needle\n"))
-        const result = yield* (yield* Ripgrep.Service).glob({ cwd, pattern: "**/*.ts", limit: 10 })
-        expect(result.map((item) => item.path)).toEqual([RelativePath.make("src/match.ts")])
-      }),
-    ),
-  )
-
-  it.live("greps files with include filtering", () =>
-    withTmp((cwd) =>
-      Effect.gen(function* () {
-        yield* Effect.promise(() => fs.mkdir(path.join(cwd, "src")))
-        yield* Effect.promise(() => fs.writeFile(path.join(cwd, "src", "match.ts"), "needle\n"))
-        yield* Effect.promise(() => fs.writeFile(path.join(cwd, "src", "skip.txt"), "needle\n"))
-        const result = yield* (yield* Ripgrep.Service).grep({ cwd, pattern: "needle", include: "*.ts", limit: 10 })
-        expect(result).toHaveLength(1)
-        expect(result[0]?.entry.path).toBe(RelativePath.make("src/match.ts"))
-        expect(result[0]?.submatches[0]?.text).toBe("needle")
-      }),
-    ),
-  )
+        const search = yield* FileSystemSearch.Service
+        yield* Effect.sleep("10 millis")
+        expect(observed?.limit).toBe(100_000)
+        expect(observed?.exclude).toEqual([...Protected.names()].map((name) => `${name}/**`))
+        expect((yield* search.find({ query: "src", type: "directory" }))[0]?.path).toBe(
+          RelativePath.make(`src${path.sep}`),
+        )
+      }).pipe(Effect.provide(layer), Effect.scoped),
+    )
+  })
 })

packages/core/test/formatter.test.ts

@@ -56,52 +56,22 @@ function withTemp<A, E, R>(body: (directory: string) => Effect.Effect<A, E, R>)
 }
 
 describe("Formatter", () => {
-  it.live("status() returns empty list when no formatters are configured", () =>
+  it.live("does not run formatters marked as disabled in config", () =>
     withTemp((directory) =>
-      Formatter.Service.use((formatter) => formatter.status()).pipe(Effect.provide(formatterLayer(directory))),
-    ),
-  )
-
-  it.live("status() returns built-in formatters when formatter is true", () =>
-    withTemp((directory) =>
-      Formatter.Service.use((formatter) =>
-        Effect.gen(function* () {
-          const statuses = yield* formatter.status()
-          const gofmt = statuses.find((item) => item.name === "gofmt")
-          expect(gofmt).toBeDefined()
-          expect(gofmt?.extensions).toContain(".go")
-        }),
-      ).pipe(Effect.provide(formatterLayer(directory, true))),
-    ),
-  )
-
-  it.live("status() keeps built-in formatters when config object is provided", () =>
-    withTemp((directory) =>
-      Formatter.Service.use((formatter) =>
-        Effect.gen(function* () {
-          const statuses = yield* formatter.status()
-          expect(statuses.find((item) => item.name === "gofmt")?.extensions).toContain(".go")
-          expect(statuses.find((item) => item.name === "mix")).toBeDefined()
-        }),
-      ).pipe(Effect.provide(formatterLayer(directory, { gofmt: {} }))),
-    ),
-  )
-
-  it.live("status() excludes formatters marked as disabled in config", () =>
-    withTemp((directory) =>
-      Formatter.Service.use((formatter) =>
-        Effect.gen(function* () {
-          const statuses = yield* formatter.status()
-          expect(statuses.find((item) => item.name === "gofmt")).toBeUndefined()
-          expect(statuses.find((item) => item.name === "mix")).toBeDefined()
-        }),
-      ).pipe(Effect.provide(formatterLayer(directory, { gofmt: { disabled: true } }))),
-    ),
-  )
-
-  it.live("service initializes without error", () =>
-    withTemp((directory) =>
-      Formatter.Service.use((formatter) => formatter.init()).pipe(Effect.provide(formatterLayer(directory))),
+      Effect.gen(function* () {
+        const file = path.join(directory, "test.disabled")
+        expect(yield* Formatter.Service.use((formatter) => formatter.file(file))).toBe(false)
+      }).pipe(
+        Effect.provide(
+          formatterLayer(directory, {
+            disabled: {
+              disabled: true,
+              command: [process.execPath, "-e", "process.exit(0)", "$FILE"],
+              extensions: [".disabled"],
+            },
+          }),
+        ),
+      ),
     ),
   )
 
@@ -115,22 +85,29 @@ describe("Formatter", () => {
     ),
   )
 
-  it.live("status() initializes formatter state per directory", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => Promise.all([tmpdir(), tmpdir()])),
-      ([off, on]) =>
+  it.live("loads formatter state per directory", () =>
+    withTemp((off) =>
+      withTemp((on) =>
         Effect.gen(function* () {
-          const disabled = yield* Formatter.Service.use((formatter) => formatter.status()).pipe(
-            Effect.provide(formatterLayer(off.path, false)),
+          const offFile = path.join(off, "test.isolated")
+          const onFile = path.join(on, "test.isolated")
+          const disabled = yield* Formatter.Service.use((formatter) => formatter.file(offFile)).pipe(
+            Effect.provide(formatterLayer(off, false)),
           )
-          const enabled = yield* Formatter.Service.use((formatter) => formatter.status()).pipe(
-            Effect.provide(formatterLayer(on.path, true)),
+          const enabled = yield* Formatter.Service.use((formatter) => formatter.file(onFile)).pipe(
+            Effect.provide(
+              formatterLayer(on, {
+                isolated: {
+                  command: [process.execPath, "-e", "process.exit(0)", "$FILE"],
+                  extensions: [".isolated"],
+                },
+              }),
+            ),
           )
-          expect(disabled).toEqual([])
-          expect(enabled.find((item) => item.name === "gofmt")).toBeDefined()
+          expect(disabled).toBe(false)
+          expect(enabled).toBe(true)
         }),
-      (directories) =>
-        Effect.promise(() => Promise.all(directories.map((tmp) => tmp[Symbol.asyncDispose]())).then(() => undefined)),
+      ),
     ),
   )
 

packages/core/test/git.test.ts

@@ -185,9 +185,6 @@ describe("Git trees", () => {
       ])
 
       const files = new Map([[RelativePath.make("scope/tracked.txt"), before]])
-      const preview = yield* git.tree.preview({ repository, current: after, files, context: 1 })
-      expect(preview).toHaveLength(1)
-      expect(preview[0]?.file).toBe(RelativePath.make("scope/tracked.txt"))
       yield* git.tree.restore({ repository, files })
       expect(yield* read(path.join(root.path, "scope", "tracked.txt"))).toBe("one\n")
       expect(yield* read(path.join(root.path, "scope", "added.txt"))).toBe("added\n")

packages/core/test/instruction-state.test.ts

@@ -14,7 +14,7 @@ import { AbsolutePath } from "@opencode-ai/core/schema"
 import { InstructionState } from "@opencode-ai/core/session/instruction-state"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
 import { SessionSchema } from "@opencode-ai/core/session/schema"
-import { InstructionBlobTable, InstructionStateTable, SessionTable } from "@opencode-ai/core/session/sql"
+import { InstructionBlobTable, InstructionStateTable, SessionMessageTable, SessionTable } from "@opencode-ai/core/session/sql"
 import { testEffect } from "./lib/effect"
 
 const it = testEffect(AppNodeBuilder.build(LayerNode.group([Database.node, Bus.node, SessionProjector.node])))
@@ -105,6 +105,7 @@ describe("InstructionState", () => {
       expect(observation).toEqual({
         sessionID,
         initial: true,
+        previous: {},
         current: {
           "test/first": Instructions.hash("first"),
           "test/second": Instructions.hash("second"),
@@ -156,7 +157,7 @@ describe("InstructionState", () => {
 
       const initial = yield* InstructionState.observe(db, instructions, sessionID)
       expect(reads).toBe(2)
-      yield* InstructionState.commit(db, events, initial)
+      yield* InstructionState.commit(db, events, instructions, initial)
       expect(reads).toBe(2)
 
       current = "changed"
@@ -166,6 +167,10 @@ describe("InstructionState", () => {
       expect(changed).toMatchObject({
         sessionID,
         initial: false,
+        previous: {
+          "test/current": Instructions.hash("initial"),
+          "test/retired": Instructions.hash("retired"),
+        },
         current: { "test/current": Instructions.hash("changed") },
         delta: {
           "test/current": Instructions.hash("changed"),
@@ -173,7 +178,7 @@ describe("InstructionState", () => {
         },
         blobs: { [Instructions.hash("changed")]: "changed" },
       })
-      yield* InstructionState.commit(db, events, changed)
+      yield* InstructionState.commit(db, events, instructions, changed)
       expect(reads).toBe(4)
       yield* unsubscribe
 
@@ -190,6 +195,11 @@ describe("InstructionState", () => {
           "test/retired": "removed",
         },
       ])
+      // The chronological update text is frozen into the event; the baseline has none.
+      expect((yield* instructionEvents(db, sessionID)).map((event) => event.data.text)).toEqual([
+        undefined,
+        "changed\n\nRemoved retired",
+      ])
       expect(yield* db.select().from(InstructionStateTable).get().pipe(Effect.orDie)).toMatchObject({
         initial_values: {
           "test/current": Instructions.hash("initial"),
@@ -222,18 +232,19 @@ describe("InstructionState", () => {
       expect(observation).toEqual({
         sessionID,
         initial: false,
+        previous: { "test/context": Instructions.hash("unchanged") },
         current: { "test/context": Instructions.hash("unchanged") },
         delta: {},
         blobs: {},
       })
-      yield* InstructionState.commit(db, events, observation)
+      yield* InstructionState.commit(db, events, instructions, observation)
 
       expect(yield* instructionEvents(db, sessionID)).toEqual(beforeEvents)
       expect(yield* db.select().from(InstructionBlobTable).all().pipe(Effect.orDie)).toEqual(beforeBlobs)
     }),
   )
 
-  it.effect("assembles a fresh private update without repairing a missing cache", () =>
+  it.effect("treats a missing state row as a fresh baseline without repairing it", () =>
     Effect.gen(function* () {
       const sessionID = SessionSchema.ID.make("ses_instruction_generate")
       const { db, events } = yield* setup(sessionID)
@@ -254,7 +265,7 @@ describe("InstructionState", () => {
 
       const assembled = yield* preview(db, sessionID, instructions)
 
-      expect(assembled).toEqual({ initial: "Initial context", updates: [], update: "Changed context" })
+      expect(assembled).toEqual({ initial: "Changed context", update: "" })
       expect(yield* instructionEvents(db, sessionID)).toEqual(beforeEvents)
       expect(yield* db.select().from(InstructionBlobTable).all().pipe(Effect.orDie)).toEqual(beforeBlobs)
       expect(
@@ -268,7 +279,7 @@ describe("InstructionState", () => {
     }),
   )
 
-  it.effect("reads through a stale cache without repairing it", () =>
+  it.effect("trusts the projected state without consulting durable events", () =>
     Effect.gen(function* () {
       const sessionID = SessionSchema.ID.make("ses_instruction_generate_stale")
       const { db, events } = yield* setup(sessionID)
@@ -280,6 +291,7 @@ describe("InstructionState", () => {
       yield* InstructionState.prepare(db, events, instructions, sessionID)
       value = "Committed update"
       yield* InstructionState.prepare(db, events, instructions, sessionID)
+      // Tamper with the projected state; the authoritative row wins over event history.
       yield* db
         .update(InstructionStateTable)
         .set({ through_seq: 0, current_values: { "test/context": Instructions.hash("Initial context") } })
@@ -294,7 +306,6 @@ describe("InstructionState", () => {
       const assembled = yield* preview(db, sessionID, instructions)
 
       expect(assembled.initial).toBe("Initial context")
-      expect(assembled.updates.map((entry) => entry.message.text)).toEqual(["Committed update"])
       expect(assembled.update).toBe("Private update")
       expect(yield* instructionEvents(db, sessionID)).toEqual(beforeEvents)
       expect(yield* db.select().from(InstructionBlobTable).all().pipe(Effect.orDie)).toEqual(beforeBlobs)
@@ -302,6 +313,41 @@ describe("InstructionState", () => {
     }),
   )
 
+  it.effect("persists chronological updates as system messages", () =>
+    Effect.gen(function* () {
+      const sessionID = SessionSchema.ID.make("ses_instruction_messages")
+      const { db, events } = yield* setup(sessionID)
+      let value = "Initial context"
+      const instructions = source(
+        "test/context",
+        Effect.sync(() => value),
+      )
+      const messages = () =>
+        db
+          .select()
+          .from(SessionMessageTable)
+          .where(and(eq(SessionMessageTable.session_id, sessionID), eq(SessionMessageTable.type, "system")))
+          .orderBy(asc(SessionMessageTable.seq))
+          .all()
+          .pipe(Effect.orDie)
+
+      // The initial baseline is not chronological history and produces no message.
+      yield* InstructionState.prepare(db, events, instructions, sessionID)
+      expect(yield* messages()).toEqual([])
+
+      value = "Changed context"
+      yield* InstructionState.prepare(db, events, instructions, sessionID)
+      const rows = yield* messages()
+      expect(rows).toHaveLength(1)
+      expect(rows[0]?.data).toMatchObject({ text: "Changed context" })
+      expect(rows.map((row) => row.seq)).toEqual([(yield* instructionEvents(db, sessionID)).at(-1)!.seq])
+
+      // A no-op observation adds nothing.
+      yield* InstructionState.prepare(db, events, instructions, sessionID)
+      expect(yield* messages()).toHaveLength(1)
+    }),
+  )
+
   it.effect("assembles initial instructions without persisting a baseline", () =>
     Effect.gen(function* () {
       const sessionID = SessionSchema.ID.make("ses_instruction_generate_initial")
@@ -310,7 +356,6 @@ describe("InstructionState", () => {
 
       expect(yield* preview(db, sessionID, instructions)).toEqual({
         initial: "Initial context",
-        updates: [],
         update: "",
       })
       expect(yield* instructionEvents(db, sessionID)).toEqual([])
@@ -336,7 +381,6 @@ describe("InstructionState", () => {
 
       expect(yield* preview(db, sessionID, instructions)).toEqual({
         initial: "Committed context",
-        updates: [],
         update: "",
       })
       expect(yield* instructionEvents(db, sessionID)).toEqual(beforeEvents)
@@ -388,7 +432,7 @@ describe("InstructionState", () => {
       for (const next of ["initial", "changed", "changed", Instructions.removed] as const) {
         value = next
         yield* InstructionState.observe(db, observedInstructions, observedSessionID).pipe(
-          Effect.flatMap((observation) => InstructionState.commit(db, events, observation)),
+          Effect.flatMap((observation) => InstructionState.commit(db, events, observedInstructions, observation)),
         )
         yield* InstructionState.prepare(db, events, preparedInstructions, preparedSessionID)
       }

packages/core/test/location.test.ts

@@ -21,7 +21,6 @@ const projectLayer = Layer.succeed(
         canonical: AbsolutePath.make("/main/repo"),
         vcs: { type: "git", store: AbsolutePath.make("/repo/.git") },
       }),
-    commit: () => Effect.void,
   }),
 )
 const it = testEffect(AppNodeBuilder.build(Location.boundNode(ref), [[Project.node, projectLayer]]))

packages/core/test/repository-cache.test.ts

@@ -101,13 +101,10 @@ describe("RepositoryCache", () => {
     ),
   )
 
-  it.live("returns typed validation and clone failures", () =>
+  it.live("returns typed branch validation and clone failures", () =>
     withRemote((fixture) =>
       Effect.gen(function* () {
         const cache = yield* RepositoryCache.Service
-        const invalidRepository = yield* Effect.flip(RepositoryCache.parseRemote("not-a-repo"))
-        expect(invalidRepository).toBeInstanceOf(RepositoryCache.InvalidRepositoryError)
-
         const invalidBranch = yield* Effect.flip(cache.ensure({ reference: fixture.reference, branch: "../unsafe" }))
         expect(invalidBranch).toBeInstanceOf(RepositoryCache.InvalidBranchError)
 

packages/core/test/ripgrep.test.ts

@@ -11,6 +11,44 @@ import { testEffect } from "./lib/effect"
 const it = testEffect(LayerNode.compile(Ripgrep.node))
 
 describe("Ripgrep", () => {
+  it.live("globs files as an array", () =>
+    Effect.acquireUseRelease(
+      Effect.promise(() => tmpdir()),
+      (tmp) =>
+        Effect.gen(function* () {
+          yield* Effect.promise(() => fs.mkdir(path.join(tmp.path, "src")))
+          yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "src", "match.ts"), "needle\n"))
+
+          const result = yield* (yield* Ripgrep.Service).glob({ cwd: tmp.path, pattern: "**/*.ts", limit: 10 })
+          expect(result.map((item) => item.path)).toEqual([RelativePath.make("src/match.ts")])
+        }),
+      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+    ),
+  )
+
+  it.live("greps files with include filtering", () =>
+    Effect.acquireUseRelease(
+      Effect.promise(() => tmpdir()),
+      (tmp) =>
+        Effect.gen(function* () {
+          yield* Effect.promise(() => fs.mkdir(path.join(tmp.path, "src")))
+          yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "src", "match.ts"), "needle\n"))
+          yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "src", "skip.txt"), "needle\n"))
+
+          const result = yield* (yield* Ripgrep.Service).grep({
+            cwd: tmp.path,
+            pattern: "needle",
+            include: "*.ts",
+            limit: 10,
+          })
+          expect(result).toHaveLength(1)
+          expect(result[0]?.entry.path).toBe(RelativePath.make("src/match.ts"))
+          expect(result[0]?.submatches[0]?.text).toBe("needle")
+        }),
+      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+    ),
+  )
+
   it.live("keeps ignored files out of catch-all find results", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
@@ -63,6 +101,29 @@ describe("Ripgrep", () => {
     ),
   )
 
+  it.live("excludes protected directory trees from catch-all find results", () =>
+    Effect.acquireUseRelease(
+      Effect.promise(() => tmpdir()),
+      (tmp) =>
+        Effect.gen(function* () {
+          yield* Effect.promise(() => fs.mkdir(path.join(tmp.path, "Pictures")))
+          yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "Pictures", "private.jpg"), "private\n"))
+          yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "visible.txt"), "visible\n"))
+
+          const files = yield* (yield* Ripgrep.Service).find({
+            cwd: tmp.path,
+            pattern: "*",
+            limit: 10,
+            exclude: ["Pictures/**"],
+          })
+
+          expect(files.map((item) => item.path)).toContain(RelativePath.make("visible.txt"))
+          expect(files.map((item) => item.path)).not.toContain(RelativePath.make("Pictures/private.jpg"))
+        }),
+      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+    ),
+  )
+
   it.live("returns a bounded preview for matches on oversized lines", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),

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

@@ -36,7 +36,6 @@ const projects = Layer.succeed(
     list: () => Effect.succeed([]),
     resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
     directories: () => Effect.succeed([]),
-    commit: () => Effect.void,
   }),
 )
 let requests: LLMRequest[] = []

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

@@ -34,7 +34,6 @@ const projects = Layer.succeed(
     list: () => Effect.succeed([]),
     resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
     directories: () => Effect.succeed([]),
-    commit: () => Effect.void,
   }),
 )
 const it = testEffect(
@@ -284,13 +283,9 @@ describe("Session.create", () => {
       })
       expect(yield* SessionPending.find(db, forkContext[0].id)).toBeUndefined()
       expect(yield* SessionPending.find(db, forkContext[1].id)).toBeUndefined()
-      // Fork-copied messages have no admitted event in the fork aggregate, so
-      // reusing their IDs as prompt IDs is conflicting reuse, not a retry.
       expect(
-        yield* session
-          .prompt({ id: forkContext[0].id, sessionID: forked.id, text: "First", resume: false })
-          .pipe(Effect.flip),
-      ).toMatchObject({ _tag: "Session.PromptConflictError", messageID: forkContext[0].id })
+        yield* session.prompt({ id: forkContext[0].id, sessionID: forked.id, text: "First", resume: false }),
+      ).toMatchObject({ id: forkContext[0].id, type: "user", data: { text: "First" } })
 
       yield* session.prompt({
         sessionID: parent.id,

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

@@ -56,7 +56,6 @@ const projects = Layer.succeed(
     list: () => Effect.succeed([]),
     resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
     directories: () => Effect.succeed([]),
-    commit: () => Effect.void,
   }),
 )
 const permission = Layer.succeed(

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

@@ -23,7 +23,6 @@ const projects = Layer.succeed(
     list: () => Effect.succeed([]),
     resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
     directories: () => Effect.succeed([]),
-    commit: () => Effect.void,
   }),
 )
 const it = testEffect(
@@ -41,17 +40,15 @@ describe("Session.log", () => {
   it.effect("replays public session events and marks synced at the aggregate watermark", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
-      const bus = yield* Bus.Service
       const created = yield* session.create({ location })
       yield* session.rename({ sessionID: created.id, title: "session.renamed" })
 
       const items = Array.from(yield* Stream.runCollect(session.log({ sessionID: created.id })))
-      const watermark = (yield* bus.sequences([created.id])).get(created.id)
 
       // Session creation commits a non-public durable event, so the marker's
       // seq covers more of the aggregate than the public events emitted.
       expect(items.map((item) => item.type)).toEqual(["session.renamed", "log.synced"])
-      expect(items.at(-1)).toEqual({ type: "log.synced", aggregateID: created.id, seq: watermark })
+      expect(items.at(-1)).toEqual({ type: "log.synced", aggregateID: created.id, seq: Event.Seq.make(1) })
     }),
   )
 

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

@@ -17,7 +17,6 @@ import { Session } from "@opencode-ai/core/session"
 import { SessionEvent } from "@opencode-ai/core/session/event"
 import { SessionMessage } from "@opencode-ai/core/session/message"
 import { Money } from "@opencode-ai/schema/money"
-import { SessionMessageUpdater } from "@opencode-ai/core/session/message-updater"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
 import { SessionExecution } from "@opencode-ai/core/session/execution"
 import { fromRow } from "@opencode-ai/core/session/info"
@@ -126,34 +125,6 @@ describe("SessionProjector", () => {
     }),
   )
 
-  it.effect("folds live compaction deltas into running memory state", () =>
-    Effect.gen(function* () {
-      const state = {
-        messages: [
-          SessionMessage.CompactionRunning.make({
-            id: SessionMessage.ID.make("msg_compaction"),
-            type: "compaction",
-            status: "running",
-            reason: "manual",
-            summary: "partial ",
-            recent: "recent",
-            time: { created },
-          }),
-        ],
-      }
-      yield* SessionMessageUpdater.update(
-        SessionMessageUpdater.memory(state),
-        SessionEvent.Compaction.Delta.make({
-          id: Event.ID.make("evt_delta"),
-          type: "session.compaction.delta",
-          created,
-          data: { sessionID, text: "summary" },
-        }),
-      )
-      expect(state.messages[0]).toMatchObject({ status: "running", summary: "partial summary", recent: "recent" })
-    }),
-  )
-
   it.effect("projects staged, cleared, and committed reverts", () =>
     Effect.gen(function* () {
       const db = (yield* Database.Service).db
@@ -550,31 +521,6 @@ describe("SessionProjector", () => {
     }),
   )
 
-  it.effect("does not revive a stale incomplete in-memory assistant projection", () =>
-    Effect.gen(function* () {
-      const stale = SessionMessage.Assistant.make({
-        id: SessionMessage.ID.make("msg_assistant_stale"),
-        type: "assistant",
-        agent: build,
-        model,
-        content: [],
-        time: { created },
-      })
-      const completed = SessionMessage.Assistant.make({
-        id: SessionMessage.ID.make("msg_assistant_completed"),
-        type: "assistant",
-        agent: build,
-        model,
-        content: [],
-        time: { created: DateTime.makeUnsafe(1), completed: DateTime.makeUnsafe(2) },
-      })
-
-      expect(
-        yield* SessionMessageUpdater.memory({ messages: [stale, completed] }).getCurrentAssistant(),
-      ).toBeUndefined()
-    }),
-  )
-
   it.effect("projects retry state and clears it at the next step or execution terminal", () =>
     Effect.gen(function* () {
       const { db } = yield* Database.Service

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

@@ -553,6 +553,47 @@ describe("Session.prompt", () => {
     }),
   )
 
+  it.effect("reconciles an exact retry from the promoted message without admission history", () =>
+    Effect.gen(function* () {
+      yield* setup
+      const session = yield* Session.Service
+      const bus = yield* Bus.Service
+      const { db } = yield* Database.Service
+      const input = { sessionID, id: messageID, text: "Fix the failing tests", resume: false }
+      const first = yield* session.prompt(input)
+      yield* SessionPending.promote(db, bus, sessionID, "steer")
+      yield* db
+        .delete(EventTable)
+        .where(eq(EventTable.aggregate_id, sessionID))
+        .run()
+        .pipe(Effect.orDie)
+
+      const retried = yield* session.prompt(input)
+
+      expect(retried).toMatchObject({ id: first.id, type: "user", data: { text: first.data.text } })
+      expect(yield* session.messages({ sessionID })).toMatchObject([
+        { id: messageID, type: "user", text: "Fix the failing tests" },
+      ])
+    }),
+  )
+
+  it.effect("ignores delivery when retrying a promoted message", () =>
+    Effect.gen(function* () {
+      yield* setup
+      const session = yield* Session.Service
+      const bus = yield* Bus.Service
+      const { db } = yield* Database.Service
+      const input = { sessionID, id: messageID, text: "Fix the failing tests", resume: false }
+      yield* session.prompt(input)
+      yield* SessionPending.promote(db, bus, sessionID, "steer")
+
+      const retried = yield* session.prompt({ ...input, delivery: "queue" })
+
+      expect(retried).toMatchObject({ id: messageID, type: "user", data: { text: input.text } })
+      expect(yield* admitted(messageID)).toBeUndefined()
+    }),
+  )
+
   it.effect("wakes execution when an exact prompt retry recovers a committed message", () =>
     Effect.gen(function* () {
       yield* setup

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

@@ -19,7 +19,6 @@ const projects = Layer.succeed(
     list: () => Effect.succeed([]),
     resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
     directories: () => Effect.succeed([]),
-    commit: () => Effect.void,
   }),
 )
 const it = testEffect(

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

@@ -1180,7 +1180,7 @@ describe("SessionRunnerLLM", () => {
     }),
   )
 
-  it.effect("forks instruction values at the selected message instead of the parent's latest state", () =>
+  it.effect("seeds a fork with the parent's newest instruction values", () =>
     Effect.gen(function* () {
       const session = yield* setup
       yield* runPrompt(session, "First")
@@ -1197,14 +1197,16 @@ describe("SessionRunnerLLM", () => {
           .where(eq(InstructionStateTable.session_id, forked.id))
           .get(),
       ).toMatchObject({
-        initial_values: { "test/context": Instructions.hash("Changed context") },
-        current_values: { "test/context": Instructions.hash("Changed context") },
+        initial_values: { "test/context": Instructions.hash("Latest context") },
+        current_values: { "test/context": Instructions.hash("Latest context") },
       })
       yield* session.prompt({ sessionID: forked.id, text: "Forked", resume: false })
       yield* session.resume(forked.id)
 
-      expect(requests.at(-1)?.system.map((part) => part.text)).toEqual([defaultSystem, "Changed context"])
-      expect(systemTexts(requests.at(-1)!)).toContain("Latest context")
+      expect(requests.at(-1)?.system.map((part) => part.text)).toEqual([defaultSystem, "Latest context"])
+      // Copied history keeps the frozen chronological update; no new update is emitted.
+      expect(systemTexts(requests.at(-1)!)).toContain("Changed context")
+      expect(systemTexts(requests.at(-1)!)).not.toContain("Latest context")
 
       const { db } = yield* Database.Service
       const bus = yield* Bus.Service
@@ -1263,7 +1265,7 @@ describe("SessionRunnerLLM", () => {
     }),
   )
 
-  it.effect("rebuilds a missing instruction cache without admitting another delta", () =>
+  it.effect("re-establishes a fresh baseline when instruction state is missing", () =>
     Effect.gen(function* () {
       const session = yield* setup
       const { db } = yield* Database.Service
@@ -1277,13 +1279,15 @@ describe("SessionRunnerLLM", () => {
       expect(requests).toHaveLength(1)
       expect(requests[0]?.system.map((part) => part.text)).toEqual([defaultSystem, "Initial context"])
       expect(messageRoles(requests[0])).toEqual(["user", "user"])
+      // The projected row is authoritative: a missing row admits a fresh baseline
+      // instead of rebuilding from durable events.
       expect(
         yield* db
-          .select({ id: EventTable.id })
+          .select({ data: EventTable.data })
           .from(EventTable)
           .where(eq(EventTable.type, "session.instructions.updated.2"))
           .all(),
-      ).toHaveLength(1)
+      ).toHaveLength(2)
       expect(yield* db.select().from(InstructionStateTable).get()).toMatchObject({
         initial_values: { "test/context": Instructions.hash("Initial context") },
         current_values: { "test/context": Instructions.hash("Initial context") },
@@ -1310,7 +1314,10 @@ describe("SessionRunnerLLM", () => {
       ])
       expect(messageRoles(requests[1])).toEqual(["user", "system", "user"])
       expect(requests[1]?.messages.at(1)?.content).toEqual([{ type: "text", text: "Changed context" }])
-      expect(yield* session.messages({ sessionID })).toHaveLength(2)
+      // The chronological update is a durable client-visible system message.
+      const messages = yield* session.messages({ sessionID })
+      expect(messages).toHaveLength(3)
+      expect(messages[1]).toMatchObject({ type: "system", text: "Changed context" })
       const { db } = yield* Database.Service
       const updates = yield* db
         .select({ data: EventTable.data })
@@ -1327,9 +1334,10 @@ describe("SessionRunnerLLM", () => {
       expect(updates[1]?.data).toEqual({
         sessionID,
         delta: { "test/context": Instructions.hash("Changed context") },
+        text: "Changed context",
       })
       yield* replaySessionProjection(sessionID)
-      expect(yield* session.messages({ sessionID })).toHaveLength(2)
+      expect(yield* session.messages({ sessionID })).toHaveLength(3)
     }),
   )
 
@@ -1596,7 +1604,7 @@ describe("SessionRunnerLLM", () => {
       expect(requests[1]?.messages.at(1)?.content).toEqual([
         { type: "text", text: "System context source removed: test/context" },
       ])
-      expect(yield* session.messages({ sessionID })).toHaveLength(2)
+      expect(yield* session.messages({ sessionID })).toHaveLength(3)
     }),
   )
 
@@ -1708,12 +1716,14 @@ describe("SessionRunnerLLM", () => {
       expect(requests[2]?.messages.filter((message) => message.role === "system")).toHaveLength(2)
       expect((yield* session.context(sessionID)).map((message) => message.type)).toEqual([
         "user",
+        "system",
         "user",
         "model-switched",
+        "system",
         "user",
       ])
       yield* replaySessionProjection(sessionID)
-      expect(yield* session.messages({ sessionID })).toHaveLength(4)
+      expect(yield* session.messages({ sessionID })).toHaveLength(6)
       yield* runPrompt(session, "Fourth")
     }),
   )

packages/core/test/snapshot.test.ts

@@ -117,9 +117,6 @@ describe("Snapshot", () => {
               RelativePath.make("scope/tracked.txt"),
             ])
             const plan = new Map([[RelativePath.make("scope/tracked.txt"), before]])
-            const preview = yield* snapshot.preview({ files: plan, context: 1 })
-            expect(preview).toHaveLength(1)
-            expect(preview[0]?.file).toBe(RelativePath.make("scope/tracked.txt"))
             yield* snapshot.restore({ files: plan })
             expect(yield* read(path.join(location, "tracked.txt"))).toBe("one\n")
             expect(yield* read(path.join(location, "added.txt"))).toBe("added\n")
@@ -185,36 +182,6 @@ describe("Snapshot", () => {
       (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
     ),
   )
-
-  testEffect(Layer.empty).live("checks out a legacy revert snapshot without removing unrelated files", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) =>
-        Effect.gen(function* () {
-          const project = path.join(tmp.path, "project")
-          yield* Effect.promise(async () => {
-            await fs.mkdir(project)
-            await fs.writeFile(path.join(project, "tracked.txt"), "one\n")
-            await initGit(project)
-          })
-
-          yield* Effect.gen(function* () {
-            const snapshot = yield* Snapshot.Service
-            const before = yield* snapshot.capture()
-            expect(before).toBeDefined()
-            if (!before) return
-            yield* Effect.promise(async () => {
-              await fs.writeFile(path.join(project, "tracked.txt"), "two\n")
-              await fs.writeFile(path.join(project, "unrelated.txt"), "keep\n")
-            })
-            yield* snapshot.checkout(before)
-            expect(yield* read(path.join(project, "tracked.txt"))).toBe("one\n")
-            expect(yield* read(path.join(project, "unrelated.txt"))).toBe("keep\n")
-          }).pipe(Effect.provide(snapshotLayer(tmp.path, project)))
-        }),
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-    ),
-  )
 })
 
 function snapshotLayer(data: string, directory: string) {

packages/schema/src/session-event.ts

@@ -186,6 +186,11 @@ export const InstructionsUpdated = Event.durable({
   schema: {
     ...Base,
     delta: Instruction.Delta,
+    /**
+     * The rendered chronological update shown to the model, frozen at emit time.
+     * Absent for the initial baseline observation and for deltas that render empty.
+     */
+    text: Schema.String.pipe(optional),
   },
 })
 export type InstructionsUpdated = typeof InstructionsUpdated.Type

packages/server/src/auth.ts

@@ -2,10 +2,6 @@ export * as ServerAuth from "./auth"
 
 import { Context, Layer, Option, Redacted } from "effect"
 
-export type Credentials = {
-  password?: string
-}
-
 export type DecodedCredentials = {
   readonly username: string
   readonly password: Redacted.Redacted
@@ -37,16 +33,3 @@ export function authorized(credentials: DecodedCredentials, config: Info) {
     Redacted.value(credentials.password) === config.password.value
   )
 }
-
-export function header(credentials?: Credentials) {
-  const password = credentials?.password
-  if (!password) return undefined
-
-  return `Basic ${Buffer.from(`opencode:${password}`).toString("base64")}`
-}
-
-export function headers(credentials?: Credentials) {
-  const authorization = header(credentials)
-  if (!authorization) return undefined
-  return { Authorization: authorization }
-}

packages/server/test/auth.test.ts

@@ -7,7 +7,3 @@ test("accepts only the fixed opencode username", () => {
   expect(ServerAuth.authorized({ username: "opencode", password: Redacted.make("secret") }, config)).toBe(true)
   expect(ServerAuth.authorized({ username: "custom", password: Redacted.make("secret") }, config)).toBe(false)
 })
-
-test("encodes the fixed opencode username", () => {
-  expect(ServerAuth.header({ password: "secret" })).toBe(`Basic ${Buffer.from("opencode:secret").toString("base64")}`)
-})

packages/session-ui/src/components/line-comment-styles.ts

@@ -36,10 +36,6 @@ export const lineCommentStyles = `
   border: none;
 }
 
-[data-component="line-comment"][data-variant="add"] [data-slot="line-comment-button"] {
-  background: var(--syntax-diff-add);
-}
-
 [data-component="line-comment"] [data-component="icon"] {
   color: var(--white);
 }

packages/session-ui/src/components/line-comment.tsx

@@ -9,7 +9,7 @@ import { useI18n } from "@opencode-ai/ui/context/i18n"
 
 installLineCommentStyles()
 
-export type LineCommentVariant = "default" | "editor" | "add"
+export type LineCommentVariant = "default" | "editor"
 
 function InlineGlyph(props: { icon: "comment" | "plus" }) {
   return (
@@ -156,25 +156,6 @@ export const LineComment = (props: LineCommentProps) => {
   )
 }
 
-export type LineCommentAddProps = Omit<LineCommentAnchorProps, "children" | "variant" | "open" | "icon"> & {
-  label?: string
-}
-
-export const LineCommentAdd = (props: LineCommentAddProps) => {
-  const [split, rest] = splitProps(props, ["label"])
-  const i18n = useI18n()
-
-  return (
-    <LineCommentAnchor
-      {...rest}
-      open={false}
-      variant="add"
-      icon="plus"
-      buttonLabel={split.label ?? i18n.t("ui.lineComment.submit")}
-    />
-  )
-}
-
 export type LineCommentEditorProps = Omit<LineCommentAnchorProps, "children" | "open" | "variant" | "onClick"> & {
   value: string
   selection: JSX.Element

packages/session-ui/src/components/message-part.tsx

@@ -948,10 +948,6 @@ function ExaOutput(props: { output?: string }) {
   )
 }
 
-export function registerPartComponent(type: string, component: PartComponent) {
-  PART_MAPPING[type] = component
-}
-
 export function Message(props: MessageProps) {
   return (
     <Switch>

packages/tui/test/cli/tui/diff-viewer.test.tsx

@@ -147,12 +147,12 @@ async function renderDiffViewer(vcsDiff: unknown[], height = 20, initialRoute?:
   const config = createTuiResolvedConfig()
   const transport = createFetch((url) => {
     if (url.pathname !== "/api/vcs/diff") return
-    if (fail) return json({ message: "boom" }, { status: 500 })
     vcsDiffInput = {
       location: { directory: url.searchParams.get("location[directory]") },
       mode: url.searchParams.get("mode"),
       context: url.searchParams.get("context"),
     }
+    if (fail) return json({ message: "boom" }, { status: 500 })
     return json({
       location: { directory: "/repo/session", project: { id: "project-1", directory: "/repo/session" } },
       data: vcsDiff,
@@ -238,6 +238,7 @@ async function renderDiffViewer(vcsDiff: unknown[], height = 20, initialRoute?:
 
   const app = await testRender(() => <Harness />, { width: 80, height })
   await waitForCommand(app, commands, "diff.close")
+  await app.waitFor(() => vcsDiffInput !== undefined)
   return {
     app,
     commands,