fix(core): retain interrupted shell output

bun.lock

@@ -143,10 +143,7 @@
         "open": "10.1.2",
         "semver": "catalog:",
         "solid-js": "catalog:",
-        "tree-sitter-bash": "0.25.0",
-        "tree-sitter-powershell": "0.25.10",
         "uqr": "0.1.3",
-        "web-tree-sitter": "0.25.10",
         "ws": "8.21.0",
       },
       "devDependencies": {
@@ -405,11 +402,8 @@
         "immer": "11.1.4",
         "jsonc-parser": "3.3.1",
         "semver": "^7.6.3",
-        "tree-sitter-bash": "0.25.0",
-        "tree-sitter-powershell": "0.25.10",
         "turndown": "7.2.0",
         "venice-ai-sdk-provider": "2.1.1",
-        "web-tree-sitter": "0.25.10",
         "which": "6.0.1",
         "zod": "catalog:",
       },
@@ -1079,11 +1073,9 @@
   },
   "trustedDependencies": [
     "esbuild",
-    "tree-sitter-powershell",
     "protobufjs",
     "electron",
     "web-tree-sitter",
-    "tree-sitter-bash",
   ],
   "patchedDependencies": {
     "@pierre/trees@1.0.0-beta.4": "patches/@pierre%2Ftrees@1.0.0-beta.4.patch",
@@ -4080,10 +4072,10 @@
 
     "fetch-blob": ["fetch-blob@3.2.0", "", { "dependencies": { "node-domexception": "^1.0.0", "web-streams-polyfill": "^3.0.3" } }, "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ=="],
 
-    "ffi-rs": ["ffi-rs@1.3.2", "", { "optionalDependencies": { "@yuuang/ffi-rs-android-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-x64": "1.3.2", "@yuuang/ffi-rs-linux-arm-gnueabihf": "1.3.2", "@yuuang/ffi-rs-linux-arm64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-arm64-musl": "1.3.2", "@yuuang/ffi-rs-linux-x64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-x64-musl": "1.3.2", "@yuuang/ffi-rs-win32-arm64-msvc": "1.3.2", "@yuuang/ffi-rs-win32-ia32-msvc": "1.3.2", "@yuuang/ffi-rs-win32-x64-msvc": "1.3.2" } }, "sha512-4s8dX9VbBw/jd5NOuE3EJRqXaIVdjMyiumeeDzrOhtjQRwp6Bz2za7iksWXTnvTQKV/tTdm1s1w7mObe92zPjQ=="],
-
     "file-uri-to-path": ["file-uri-to-path@1.0.0", "", {}, "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw=="],
 
+    "ffi-rs": ["ffi-rs@1.3.2", "", { "optionalDependencies": { "@yuuang/ffi-rs-android-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-arm64": "1.3.2", "@yuuang/ffi-rs-darwin-x64": "1.3.2", "@yuuang/ffi-rs-linux-arm-gnueabihf": "1.3.2", "@yuuang/ffi-rs-linux-arm64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-arm64-musl": "1.3.2", "@yuuang/ffi-rs-linux-x64-gnu": "1.3.2", "@yuuang/ffi-rs-linux-x64-musl": "1.3.2", "@yuuang/ffi-rs-win32-arm64-msvc": "1.3.2", "@yuuang/ffi-rs-win32-ia32-msvc": "1.3.2", "@yuuang/ffi-rs-win32-x64-msvc": "1.3.2" } }, "sha512-4s8dX9VbBw/jd5NOuE3EJRqXaIVdjMyiumeeDzrOhtjQRwp6Bz2za7iksWXTnvTQKV/tTdm1s1w7mObe92zPjQ=="],
+
     "filelist": ["filelist@1.0.6", "", { "dependencies": { "minimatch": "^5.0.1" } }, "sha512-5giy2PkLYY1cP39p17Ech+2xlpTRL9HLspOfEgm0L6CwBXBTgsK5ou0JtzYuepxkaQ/tvhCFIJ5uXo0OrM2DxA=="],
 
     "fill-range": ["fill-range@7.1.1", "", { "dependencies": { "to-regex-range": "^5.0.1" } }, "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg=="],
@@ -5642,10 +5634,6 @@
 
     "traverse": ["traverse@0.3.9", "", {}, "sha512-iawgk0hLP3SxGKDfnDJf8wTz4p2qImnyihM5Hh/sGvQ3K37dPi/w8sRhdNIxYA1TwFwc5mDhIJq+O0RsvXBKdQ=="],
 
-    "tree-sitter-bash": ["tree-sitter-bash@0.25.0", "", { "dependencies": { "node-addon-api": "^8.2.1", "node-gyp-build": "^4.8.2" }, "peerDependencies": { "tree-sitter": "^0.25.0" }, "optionalPeers": ["tree-sitter"] }, "sha512-gZtlj9+qFS81qKxpLfD6H0UssQ3QBc/F0nKkPsiFDyfQF2YBqYvglFJUzchrPpVhZe9kLZTrJ9n2J6lmka69Vg=="],
-
-    "tree-sitter-powershell": ["tree-sitter-powershell@0.25.10", "", { "dependencies": { "node-addon-api": "^7.1.0", "node-gyp-build": "^4.8.0" }, "peerDependencies": { "tree-sitter": "^0.25.0" }, "optionalPeers": ["tree-sitter"] }, "sha512-bEt8QoySpGFnU3aa8WedQyNMaN6aTwy/WUbvIVt0JSKF+BbJoSHNHu+wCbhj7xLMsfB0AuffmiJm+B8gzva8Lg=="],
-
     "treeverse": ["treeverse@3.0.0", "", {}, "sha512-gcANaAnd2QDZFmHFEOF4k7uc1J/6a6z3DJMd/QwEyxLoKGiptJRwid582r7QIsFlFMIZ3SnxfS52S4hm2DHkuQ=="],
 
     "trim-lines": ["trim-lines@3.0.1", "", {}, "sha512-kRj8B+YHZCc9kQYdWfJB2/oUl9rA99qbowYYBtr4ui4mZyAQ2JpvVBd/6U2YloATfqBhBTSMhTpgBHtU0Mf3Rg=="],
@@ -6868,8 +6856,6 @@
 
     "topojson-client/commander": ["commander@2.20.3", "", {}, "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ=="],
 
-    "tree-sitter-bash/node-addon-api": ["node-addon-api@8.9.0", "", {}, "sha512-ekZMeaaIzSQTSpr7X2X3iJM7lTzgnx8ahAG9pJfT/7+14mlEM8ZYQ9cgCDvSSRbReFK0oHli3WrZdCiRsgAT9Q=="],
-
     "tw-to-css/postcss": ["postcss@8.4.31", "", { "dependencies": { "nanoid": "^3.3.6", "picocolors": "^1.0.0", "source-map-js": "^1.0.2" } }, "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ=="],
 
     "tw-to-css/tailwindcss": ["tailwindcss@3.3.2", "", { "dependencies": { "@alloc/quick-lru": "^5.2.0", "arg": "^5.0.2", "chokidar": "^3.5.3", "didyoumean": "^1.2.2", "dlv": "^1.1.3", "fast-glob": "^3.2.12", "glob-parent": "^6.0.2", "is-glob": "^4.0.3", "jiti": "^1.18.2", "lilconfig": "^2.1.0", "micromatch": "^4.0.5", "normalize-path": "^3.0.0", "object-hash": "^3.0.0", "picocolors": "^1.0.0", "postcss": "^8.4.23", "postcss-import": "^15.1.0", "postcss-js": "^4.0.1", "postcss-load-config": "^4.0.1", "postcss-nested": "^6.0.1", "postcss-selector-parser": "^6.0.11", "postcss-value-parser": "^4.2.0", "resolve": "^1.22.2", "sucrase": "^3.32.0" }, "bin": { "tailwind": "lib/cli.js", "tailwindcss": "lib/cli.js" } }, "sha512-9jPkMiIBXvPc2KywkraqsUfbfj+dHDb+JPWtSJa9MLFdrPyazI7q6WX2sUrm7R9eVR7qqv3Pas7EvQFzxKnI6w=="],

packages/ai/src/provider-package.ts

@@ -1,7 +1,6 @@
 import type { Model, ProviderOptions } from "./schema"
 
 export interface Settings extends Readonly<Record<string, unknown>> {
-  readonly baseURL?: string
   readonly headers?: Readonly<Record<string, string>>
   readonly body?: Readonly<Record<string, unknown>>
   readonly limits?: {

packages/ai/src/providers/openrouter.ts

@@ -5,7 +5,6 @@ import { Framing } from "../route/framing"
 import { Protocol } from "../route/protocol"
 import { AuthOptions, type ProviderAuthOption } from "../route/auth-options"
 import { ProviderID, type ModelID, type ProviderOptions } from "../schema"
-import type { ProviderPackage } from "../provider-package"
 import * as OpenAICompatibleProfiles from "./openai-compatible-profile"
 import * as OpenAIChat from "../protocols/openai-chat"
 import { isRecord } from "../protocols/shared"
@@ -31,12 +30,6 @@ export type ModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
     readonly providerOptions?: OpenRouterProviderOptionsInput
   }
 
-export interface Settings extends ProviderPackage.Settings {
-  readonly apiKey?: string
-  readonly baseURL?: string
-  readonly providerOptions?: OpenRouterProviderOptionsInput
-}
-
 const OpenRouterBody = Schema.StructWithRest(Schema.Struct(OpenAIChat.bodyFields), [
   Schema.Record(Schema.String, Schema.Any),
 ])
@@ -120,15 +113,4 @@ export const configure = (input: ModelOptions = {}) => {
 }
 
 export const provider = configure()
-export const model: ProviderPackage.Definition<Settings, OpenRouterProviderOptionsInput>["model"] = (
-  modelID,
-  settings,
-) =>
-  configure({
-    apiKey: settings.apiKey,
-    baseURL: settings.baseURL,
-    headers: settings.headers,
-    http: settings.body === undefined ? undefined : { body: { ...settings.body } },
-    limits: settings.limits,
-    providerOptions: settings.providerOptions,
-  }).model(modelID)
+export const model = provider.model

packages/ai/src/providers/xai.ts

@@ -1,62 +1,31 @@
 import { AuthOptions, type ProviderAuthOption } from "../route/auth-options"
-import { Route, type RouteDefaultsInput } from "../route/client"
-import { Endpoint } from "../route/endpoint"
-import { HttpOptions, ProviderID, type ModelID, type ProviderOptions } from "../schema"
+import type { RouteDefaultsInput } from "../route/client"
+import { HttpOptions, ProviderID, type ModelID } from "../schema"
 import * as OpenAICompatibleProfiles from "./openai-compatible-profile"
 import * as OpenAICompatibleChat from "../protocols/openai-compatible-chat"
-import * as OpenAIChat from "../protocols/openai-chat"
 import * as OpenAIResponses from "../protocols/openai-responses"
 import { XAIImages } from "../protocols/xai-images"
-import type { OpenAIOptionsInput } from "./openai-options"
-import type { ProviderPackage } from "../provider-package"
+import type { OpenAIProviderOptionsInput } from "./openai-options"
 
 export const id = ProviderID.make("xai")
 
-export type XAIProviderOptionsInput = ProviderOptions & {
-  readonly xai?: OpenAIOptionsInput
-}
-
 export type ModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
   ProviderAuthOption<"optional"> & {
     readonly baseURL?: string
-    readonly providerOptions?: XAIProviderOptionsInput
+    readonly providerOptions?: OpenAIProviderOptionsInput
   }
 
-export interface Settings extends ProviderPackage.Settings {
-  readonly apiKey?: string
-  readonly baseURL?: string
-  readonly providerOptions?: XAIProviderOptionsInput
-}
-
 export type { XAIImageOptions } from "../protocols/xai-images"
 
-const responsesRoute = Route.make({
-  id: "openai-responses",
-  provider: id,
-  providerMetadataKey: "xai",
-  protocol: OpenAIResponses.protocol,
-  endpoint: Endpoint.path("/responses", { baseURL: OpenAICompatibleProfiles.profiles.xai.baseURL }),
-  transport: OpenAIResponses.httpTransport,
-  defaults: { providerOptions: { xai: { store: false } } },
-})
-
-const chatRoute = Route.make({
-  id: "openai-compatible-chat",
-  provider: id,
-  providerMetadataKey: "xai",
-  protocol: OpenAIChat.protocol,
-  endpoint: Endpoint.path("/chat/completions", { baseURL: OpenAICompatibleProfiles.profiles.xai.baseURL }),
-  transport: OpenAICompatibleChat.route.transport,
-})
-
-export const routes = [responsesRoute, chatRoute]
+export const routes = [OpenAIResponses.route, OpenAICompatibleChat.route]
 
 const auth = (options: ProviderAuthOption<"optional">) => AuthOptions.bearer(options, "XAI_API_KEY")
 
 const configuredResponsesRoute = (input: ModelOptions) => {
   const { apiKey: _, auth: _auth, baseURL, ...rest } = input
-  return responsesRoute.with({
+  return OpenAIResponses.route.with({
     ...rest,
+    provider: id,
     endpoint: { baseURL: baseURL ?? OpenAICompatibleProfiles.profiles.xai.baseURL },
     auth: auth(input),
   })
@@ -64,8 +33,9 @@ const configuredResponsesRoute = (input: ModelOptions) => {
 
 const configuredChatRoute = (input: ModelOptions) => {
   const { apiKey: _, auth: _auth, baseURL, ...rest } = input
-  return chatRoute.with({
+  return OpenAICompatibleChat.route.with({
     ...rest,
+    provider: id,
     endpoint: { baseURL: baseURL ?? OpenAICompatibleProfiles.profiles.xai.baseURL },
     auth: auth(input),
   })
@@ -74,8 +44,8 @@ const configuredChatRoute = (input: ModelOptions) => {
 export const configure = (input: ModelOptions = {}) => {
   const responsesRoute = configuredResponsesRoute(input)
   const chatRoute = configuredChatRoute(input)
-  const responses = (modelID: string | ModelID) => responsesRoute.model<XAIProviderOptionsInput>({ id: modelID })
-  const chat = (modelID: string | ModelID) => chatRoute.model<XAIProviderOptionsInput>({ id: modelID })
+  const responses = (modelID: string | ModelID) => responsesRoute.model<OpenAIProviderOptionsInput>({ id: modelID })
+  const chat = (modelID: string | ModelID) => chatRoute.model<OpenAIProviderOptionsInput>({ id: modelID })
   const image = (modelID: string | ModelID) =>
     XAIImages.model({
       id: modelID,
@@ -95,15 +65,7 @@ export const configure = (input: ModelOptions = {}) => {
 }
 
 export const provider = configure()
-export const model: ProviderPackage.Definition<Settings, XAIProviderOptionsInput>["model"] = (modelID, settings) =>
-  configure({
-    apiKey: settings.apiKey,
-    baseURL: settings.baseURL,
-    headers: settings.headers,
-    http: settings.body === undefined ? undefined : { body: { ...settings.body } },
-    limits: settings.limits,
-    providerOptions: settings.providerOptions,
-  }).model(modelID)
+export const model = provider.model
 export const responses = provider.responses
 export const chat = provider.chat
 export const image = provider.image

packages/ai/test/exports.test.ts

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

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

@@ -3,11 +3,11 @@ import { XAI } from "../../src/providers"
 
 const model = XAI.provider.model("grok-4")
 
-LLM.request({ model, prompt: "Hello", providerOptions: { xai: { reasoningEffort: "high" } } })
+LLM.request({ model, prompt: "Hello", providerOptions: { openai: { reasoningEffort: "high" } } })
 
 LLM.request({
   model,
   prompt: "Hello",
   // @ts-expect-error xAI's OpenAI-compatible reasoning effort must be a string.
-  providerOptions: { xai: { reasoningEffort: true } },
+  providerOptions: { openai: { reasoningEffort: true } },
 })

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

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

packages/app/src/components/titlebar-tab-nav.tsx

@@ -11,7 +11,6 @@ import { SessionTabAvatar } from "@/pages/layout/session-tab-avatar"
 import type { Session } from "@opencode-ai/sdk/v2"
 import { canOpenTabRename, forwardTabRef } from "./titlebar-tab-gesture"
 import { TabPreviewPopover } from "./titlebar-tab-popover"
-import { sessionTitle } from "@/utils/session-title"
 import "./titlebar-tab-nav.css"
 
 // MouseEvent.button uses 1 for the middle/wheel button.
@@ -55,10 +54,7 @@ export function TabNavItem(props: {
     if (!session) return
     return projectForSession(session, serverCtx()?.projects.list() ?? [])
   })
-  const title = createMemo(() => {
-    const session = props.session()
-    return session ? sessionTitle(session.title, session.parentID) : props.fallbackTitle
-  })
+  const title = createMemo(() => props.session()?.title ?? props.fallbackTitle)
 
   const projectName = createMemo(() => {
     const session = props.session()
@@ -147,7 +143,7 @@ export function TabNavItem(props: {
     if (!canOpenTabRename(props.dragging, editing(), rename.isPending)) return
     const session = props.session()
     if (!session) return
-    titleEl.textContent = session.title ?? ""
+    titleEl.textContent = session.title
     setEditing(true)
 
     requestAnimationFrame(() => {
@@ -306,7 +302,7 @@ export function TabNavItem(props: {
       }}
       data={{
         projectName: projectName(),
-        title: title(),
+        title: props.session()?.title,
         path: previewPath(),
         serverName: serverLabel(),
       }}

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

@@ -129,8 +129,8 @@ export const loadProjectsQuery = (scope: ServerScope, api: ProjectApi) =>
         api.list().then((projects) => {
           return projects
             .filter((p) => !!p?.id)
-            .map(normalizeProjectInfo)
             .filter((p) => !!p.worktree && !p.worktree.includes("opencode-test"))
+            .map(normalizeProjectInfo)
             .slice()
             .sort((a, b) => cmp(a.id, b.id))
         }),

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

@@ -168,7 +168,6 @@ export function sanitizeProject(project: Project) {
 export function normalizeProjectInfo(project: Project | CurrentProject): Project {
   return {
     ...project,
-    worktree: "canonical" in project ? project.canonical : project.worktree,
     vcs: project.vcs === "git" ? "git" : undefined,
   }
 }

packages/app/src/pages/home/home-session-search-controller.ts

@@ -7,7 +7,6 @@ import { createMemo, onCleanup } from "solid-js"
 import { createStore } from "solid-js/store"
 import type { HomeController } from "./home-controller"
 import { homeSessionSearchKey, type HomeSessionRecord, type HomeSessionsController } from "./home-sessions-controller"
-import { sessionTitle } from "@/utils/session-title"
 
 type HomeSessionSearchSource = Pick<HomeSessionsController, "data" | "session">
 
@@ -24,7 +23,7 @@ export function createHomeSessionSearchController(home: HomeController, sessions
     if (!value) return []
     return sessions.data
       .searchRecords()
-      .filter((record) => `${sessionTitle(record.session.title)} ${record.projectName}`.toLowerCase().includes(value))
+      .filter((record) => `${record.session.title} ${record.projectName}`.toLowerCase().includes(value))
   })
   const active = createMemo(() => {
     const records = results()

packages/app/src/pages/layout/sidebar-items.tsx

@@ -104,7 +104,7 @@ const SessionRow = (props: {
   warmPress: () => void
   warmFocus: () => void
 }): JSX.Element => {
-  const title = () => sessionTitle(props.session.title, props.session.parentID)
+  const title = () => sessionTitle(props.session.title)
 
   return (
     <A
@@ -229,7 +229,7 @@ export const SessionItem = (props: SessionItemProps): JSX.Element => {
               fallback={
                 <Tooltip
                   placement={props.mobile ? "bottom" : "right"}
-                  value={sessionTitle(props.session.title, props.session.parentID)}
+                  value={sessionTitle(props.session.title)}
                   gutter={10}
                   class="min-w-0 w-full"
                 >

packages/app/src/pages/session/timeline/message-timeline.tsx

@@ -297,11 +297,7 @@ export function MessageTimeline(props: {
     return sync().session.get(id)
   })
   const titleValue = createMemo(() => info()?.title)
-  const titleLabel = createMemo(() => {
-    const session = info()
-    if (!session) return
-    return sessionTitle(titleValue(), session.parentID)
-  })
+  const titleLabel = createMemo(() => sessionTitle(titleValue()))
   const shareUrl = createMemo(() => info()?.share?.url)
   const shareEnabled = createMemo(() => sync().data.config.share !== "disabled")
   const parentID = createMemo(() => info()?.parentID)
@@ -315,10 +311,7 @@ export function MessageTimeline(props: {
     if (!id) return emptyMessages
     return sync().data.message[id] ?? emptyMessages
   })
-  const parentTitle = createMemo(() => {
-    const session = parent()
-    return session ? sessionTitle(session.title, session.parentID) : language.t("command.session.new")
-  })
+  const parentTitle = createMemo(() => sessionTitle(parent()?.title) ?? language.t("command.session.new"))
   const getMsgParts = (msgId: string) => sync().data.part[msgId] ?? emptyParts
   const getMsgPart = (messageID: string, partID: string) => getMsgParts(messageID).find((part) => part.id === partID)
   const childTaskDescription = createMemo(() => {
@@ -336,7 +329,7 @@ export function MessageTimeline(props: {
     if (value) return value
     return language.t("command.session.new")
   })
-  const showHeader = createMemo(() => !!(titleLabel() || parentID()))
+  const showHeader = createMemo(() => !!(titleValue() || parentID()))
   const projection = createTimelineProjection({
     messages: sessionMessages,
     userMessages: () => props.userMessages,
@@ -919,10 +912,9 @@ export function MessageTimeline(props: {
   }
 
   function DialogDeleteSession(props: { sessionID: string }) {
-    const name = createMemo(() => {
-      const session = sync().session.get(props.sessionID)
-      return session ? sessionTitle(session.title, session.parentID) : language.t("command.session.new")
-    })
+    const name = createMemo(
+      () => sessionTitle(sync().session.get(props.sessionID)?.title) ?? language.t("command.session.new"),
+    )
     const handleDelete = async () => {
       await deleteSession(props.sessionID)
       dialog.close()

packages/app/src/utils/server-compat.ts

@@ -128,7 +128,7 @@ function createV1Api(input: CompatibleInput): CompatibleApi {
   const located = <T>(data: T, value?: { directory?: string }) => ({
     location: {
       directory: directory(value) ?? "",
-      project: { id: "", directory: directory(value) ?? "", canonical: directory(value) ?? "" },
+      project: { id: "", directory: directory(value) ?? "" },
     },
     data,
   })
@@ -298,19 +298,12 @@ function createV1Api(input: CompatibleInput): CompatibleApi {
     project: {
       ...input.current.project,
       async list() {
-        return ((await legacy().project.list()).data ?? []).map((project) => ({
-          ...project,
-          canonical: project.worktree,
-        }))
+        return ((await legacy().project.list()).data ?? []) as Project[]
       },
       async current(value?: Parameters<ServerApi["project"]["current"]>[0]) {
         const result = await legacy(value?.location).project.current()
         if (!result.data) throw new Error("Project not found")
-        return {
-          id: result.data.id,
-          directory: result.data.worktree,
-          canonical: result.data.worktree,
-        } satisfies ProjectCurrent
+        return { id: result.data.id, directory: result.data.worktree } satisfies ProjectCurrent
       },
       // async update(value: Parameters<ServerApi["project"]["update"]>[0]) {
       //   const project = (await legacy().project.list()).data?.find((item) => item.id === value.projectID)

packages/app/src/utils/session-title.test.ts

@@ -1,11 +0,0 @@
-import { describe, expect, test } from "bun:test"
-import { sessionTitle } from "./session-title"
-
-describe("sessionTitle", () => {
-  test("uses a display fallback without persisting it", () => {
-    expect(sessionTitle(undefined)).toBe("New session")
-    expect(sessionTitle(undefined, "ses_parent")).toBe("Child session")
-    expect(sessionTitle("New session - 2026-07-30T18:45:03.662Z")).toBe("New session")
-    expect(sessionTitle("Generated title")).toBe("Generated title")
-  })
-})

packages/app/src/utils/session-title.ts

@@ -1,7 +1,7 @@
 const pattern = /^(New session|Child session) - \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/
 
-export function sessionTitle(title?: string, parentID?: string) {
-  if (!title) return parentID ? "Child session" : "New session"
+export function sessionTitle(title?: string) {
+  if (!title) return title
   const match = title.match(pattern)
   return match?.[1] ?? title
 }

packages/app/src/utils/session.ts

@@ -13,7 +13,7 @@ export function normalizeSessionInfo(input: SessionInfo | Session): Session {
     parentID: input.parentID,
     cost: input.cost,
     tokens: input.tokens,
-    title: input.title ?? `${input.parentID ? "Child" : "New"} session - ${new Date(input.time.created).toISOString()}`,
+    title: input.title,
     agent: input.agent,
     model: input.model,
     version: "",

packages/cli/package.json

@@ -40,9 +40,6 @@
     "open": "10.1.2",
     "semver": "catalog:",
     "solid-js": "catalog:",
-    "tree-sitter-bash": "0.25.0",
-    "tree-sitter-powershell": "0.25.10",
-    "web-tree-sitter": "0.25.10",
     "uqr": "0.1.3",
     "ws": "8.21.0"
   },

packages/cli/script/build-node.ts

@@ -62,8 +62,8 @@ for (const target of targets) {
   await rm("dist-node", { recursive: true, force: true })
   const assetHash = await hashNodeAssets(assets)
   const input = { version: Script.version, channel: Script.channel, models: modelsData, assetHash, target }
-  await copyNodeAssets(assets)
   await build(mainConfig(input))
+  await copyNodeAssets(assets)
 
   const host = target.platform === process.platform && target.arch === process.arch
   if (host) {

packages/cli/script/node-assets.ts

@@ -3,7 +3,7 @@ import { copyFile, mkdir, readdir, readFile, stat } from "node:fs/promises"
 import path from "node:path"
 import { fileURLToPath } from "node:url"
 import { getNodeAssets } from "@opentui/core/node-assets"
-import { attentionSoundAssets, type NodeTarget, photonWasmAsset, shellParserWasmAssets } from "../src/node/target"
+import { attentionSoundAssets, type NodeTarget, photonWasmAsset } from "../src/node/target"
 
 const dir = path.resolve(import.meta.dirname, "..")
 
@@ -43,10 +43,6 @@ export async function collectNodeAssets(target: NodeTarget) {
       key: photonWasmAsset,
       source: fileURLToPath(import.meta.resolve(photonWasmAsset)),
     },
-    ...Object.values(shellParserWasmAssets).map((key) => ({
-      key,
-      source: fileURLToPath(import.meta.resolve(key)),
-    })),
     ...attentionSoundAssets.map((key) => ({
       key,
       source: path.resolve(dir, "../ui/src/assets/audio", path.basename(key)),

packages/cli/src/acp/service.ts

@@ -213,9 +213,7 @@ export function make(input: { readonly client: OpenCodeClient; readonly connecti
         sessions: page.data.map((session) => ({
           sessionId: session.id,
           cwd: session.location.directory,
-          title:
-            session.title ??
-            `${session.parentID ? "Child" : "New"} session - ${new Date(session.time.created).toISOString()}`,
+          title: session.title,
           updatedAt: new Date(session.time.updated).toISOString(),
         })),
         ...(page.cursor.next ? { nextCursor: page.cursor.next } : {}),

packages/cli/src/node/target.ts

@@ -29,11 +29,6 @@ export function nodeTarget(platform: string, arch: string) {
 }
 
 export const photonWasmAsset = "@silvia-odwyer/photon-node/photon_rs_bg.wasm"
-export const shellParserWasmAssets = {
-  runtime: "web-tree-sitter/tree-sitter.wasm",
-  bash: "tree-sitter-bash/tree-sitter-bash.wasm",
-  powershell: "tree-sitter-powershell/tree-sitter-powershell.wasm",
-} as const
 export const nodeExecArgv = ["--experimental-ffi", "--use-system-ca", "--disable-warning=ExperimentalWarning"] as const
 
 export const attentionSoundAssets = [

packages/cli/test/session-target.test.ts

@@ -3,7 +3,7 @@ import { OpenCode, type LocationGetOutput, type ModelRef, type SessionInfo } fro
 import { resolveSessionTarget, SessionTargetMutationError } from "../src/session-target"
 
 function location(directory: string, workspaceID?: string): LocationGetOutput {
-  return { directory, workspaceID, project: { id: "project", directory, canonical: directory } }
+  return { directory, workspaceID, project: { id: "project", directory } }
 }
 
 function session(id: string, directory: string, workspaceID?: string, model?: ModelRef): SessionInfo {

packages/cli/vite.node.config.ts

@@ -3,13 +3,7 @@ import { readFile } from "node:fs/promises"
 import { createRequire } from "node:module"
 import { defineConfig, type Plugin, type UserConfig } from "vite"
 import solid from "vite-plugin-solid"
-import {
-  nodeExecArgv,
-  nodeTarget,
-  type NodeTarget,
-  photonWasmAsset,
-  shellParserWasmAssets,
-} from "./src/node/target"
+import { nodeExecArgv, nodeTarget, type NodeTarget, photonWasmAsset } from "./src/node/target"
 
 const dir = import.meta.dirname
 
@@ -200,9 +194,6 @@ process.env.OTUI_ASSET_ROOT = __ocAssetRoot
 process.env.OPENCODE_NODE_PTY_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(input.target.nodePtyEntryAsset)})
 process.env.OPENCODE_PARCEL_WATCHER_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(input.target.parcelWatcherAsset)})
 process.env.OPENCODE_PHOTON_WASM_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(photonWasmAsset)})
-process.env.OPENCODE_TREE_SITTER_WASM_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(shellParserWasmAssets.runtime)})
-process.env.OPENCODE_TREE_SITTER_BASH_WASM_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(shellParserWasmAssets.bash)})
-process.env.OPENCODE_TREE_SITTER_POWERSHELL_WASM_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(shellParserWasmAssets.powershell)})
 process.env.FFF_BINARY_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(input.target.fffAsset)})
 process.env.OPENCODE_FFF_FFI_PATH = __ocPath.join(__ocAssetRoot, ${JSON.stringify(input.target.fffFfiAsset)})
 try {

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

@@ -279,7 +279,7 @@ export type ProjectCommands = { start?: string }
 
 export type ProjectTime = { created: number; updated: number; initialized?: number }
 
-export type ProjectCurrent = { id: string; directory: string; canonical: string }
+export type ProjectCurrent = { id: string; directory: string }
 
 export type ProjectDirectory = { directory: string; strategy?: string }
 
@@ -1430,7 +1430,7 @@ export type McpResourceCatalog = { resources: Array<McpResource>; templates: Arr
 
 export type Project = {
   id: string
-  canonical: string
+  worktree: string
   vcs?: ProjectVcs
   name?: string
   icon?: ProjectIcon
@@ -1757,7 +1757,7 @@ export type SessionInfo = {
   cost: MoneyUSD
   tokens: TokenUsageInfo
   time: { created: number; updated: number; archived?: number }
-  title?: string
+  title: string
   location: LocationRef
   subpath?: string
   revert?: SessionRevert
@@ -2006,7 +2006,7 @@ export type SessionV1Info = {
   cost?: number
   tokens?: { input: number; output: number; reasoning: number; cache: { read: number; write: number } }
   share?: { url: string }
-  title?: string
+  title: string
   agent?: string
   model?: { id: string; providerID: string; variant?: string }
   version: string
@@ -2515,11 +2515,7 @@ export type LocationGetInput = {
   }["location"]
 }
 
-export type LocationGetOutput = {
-  directory: string
-  workspaceID?: string
-  project: { id: string; directory: string; canonical: string }
-}
+export type LocationGetOutput = { directory: string; workspaceID?: string; project: { id: string; directory: string } }
 
 export type AgentListInput = {
   readonly location?: {
@@ -2528,7 +2524,7 @@ export type AgentListInput = {
 }
 
 export type AgentListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<AgentInfo>
 }
 
@@ -2540,7 +2536,7 @@ export type AgentGetInput = {
 }
 
 export type AgentGetOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: AgentInfo
 }
 
@@ -2551,7 +2547,7 @@ export type PluginListInput = {
 }
 
 export type PluginListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<PluginInfo>
 }
 
@@ -3235,7 +3231,7 @@ export type ModelListInput = {
 }
 
 export type ModelListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<ModelInfo>
 }
 
@@ -3246,7 +3242,7 @@ export type ModelDefaultInput = {
 }
 
 export type ModelDefaultOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: ModelInfo | null
 }
 
@@ -3273,7 +3269,7 @@ export type ProviderListInput = {
 }
 
 export type ProviderListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<ProviderInfo>
 }
 
@@ -3285,7 +3281,7 @@ export type ProviderGetInput = {
 }
 
 export type ProviderGetOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: ProviderInfo
 }
 
@@ -3296,7 +3292,7 @@ export type IntegrationListInput = {
 }
 
 export type IntegrationListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<IntegrationInfo>
 }
 
@@ -3308,7 +3304,7 @@ export type IntegrationGetInput = {
 }
 
 export type IntegrationGetOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: IntegrationInfo | null
 }
 
@@ -3355,7 +3351,7 @@ export type IntegrationOauthConnectInput = {
 }
 
 export type IntegrationOauthConnectOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: {
     attemptID: string
     url: string
@@ -3374,7 +3370,7 @@ export type IntegrationOauthStatusInput = {
 }
 
 export type IntegrationOauthStatusOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: IntegrationAttemptStatus
 }
 
@@ -3409,7 +3405,7 @@ export type IntegrationCommandConnectInput = {
 }
 
 export type IntegrationCommandConnectOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: IntegrationCommandAttempt
 }
 
@@ -3422,7 +3418,7 @@ export type IntegrationCommandStatusInput = {
 }
 
 export type IntegrationCommandStatusOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: IntegrationCommandAttemptStatus
 }
 
@@ -3443,7 +3439,7 @@ export type McpListInput = {
 }
 
 export type McpListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<McpServer>
 }
 
@@ -3532,7 +3528,7 @@ export type McpResourceCatalogInput = {
 }
 
 export type McpResourceCatalogOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: McpResourceCatalog
 }
 
@@ -3581,7 +3577,7 @@ export type FormRequestListInput = {
 }
 
 export type FormRequestListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<FormInfo>
 }
 
@@ -4437,7 +4433,7 @@ export type PermissionRequestListInput = {
 }
 
 export type PermissionRequestListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<PermissionRequest>
 }
 
@@ -4559,7 +4555,7 @@ export type FileListInput = {
 }
 
 export type FileListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<FileSystemEntry>
 }
 
@@ -4591,7 +4587,7 @@ export type FileFindInput = {
 }
 
 export type FileFindOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<FileSystemEntry>
 }
 
@@ -4602,7 +4598,7 @@ export type CommandListInput = {
 }
 
 export type CommandListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<CommandInfo>
 }
 
@@ -4613,7 +4609,7 @@ export type SkillListInput = {
 }
 
 export type SkillListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<SkillInfo>
 }
 
@@ -4626,7 +4622,7 @@ export type PtyListInput = {
 }
 
 export type PtyListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<Pty>
 }
 
@@ -4672,7 +4668,7 @@ export type PtyCreateInput = {
 }
 
 export type PtyCreateOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Pty
 }
 
@@ -4684,7 +4680,7 @@ export type PtyGetInput = {
 }
 
 export type PtyGetOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Pty
 }
 
@@ -4701,7 +4697,7 @@ export type PtyUpdateInput = {
 }
 
 export type PtyUpdateOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Pty
 }
 
@@ -4721,7 +4717,7 @@ export type ShellListInput = {
 }
 
 export type ShellListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<ShellInfo1>
 }
 
@@ -4756,7 +4752,7 @@ export type ShellCreateInput = {
 }
 
 export type ShellCreateOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: ShellInfo1
 }
 
@@ -4768,7 +4764,7 @@ export type ShellGetInput = {
 }
 
 export type ShellGetOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: ShellInfo1
 }
 
@@ -4781,7 +4777,7 @@ export type ShellTimeoutInput = {
 }
 
 export type ShellTimeoutOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: ShellInfo1
 }
 
@@ -4805,7 +4801,7 @@ export type ShellOutputInput = {
 }
 
 export type ShellOutputOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: { output: string; cursor: number; size: number; truncated: boolean }
 }
 
@@ -4825,7 +4821,7 @@ export type QuestionRequestListInput = {
 }
 
 export type QuestionRequestListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<QuestionRequest>
 }
 
@@ -4855,7 +4851,7 @@ export type ReferenceListInput = {
 }
 
 export type ReferenceListOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<ReferenceInfo>
 }
 
@@ -4898,7 +4894,7 @@ export type VcsStatusInput = {
 }
 
 export type VcsStatusOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<VcsFileStatus>
 }
 
@@ -4921,7 +4917,7 @@ export type VcsDiffInput = {
 }
 
 export type VcsDiffOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<FileDiffInfo>
 }
 
@@ -4942,7 +4938,7 @@ export type WebsearchProvidersInput = {
 }
 
 export type WebsearchProvidersOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: Array<WebSearchProvider>
 }
 
@@ -4955,6 +4951,6 @@ export type WebsearchQueryInput = {
 }
 
 export type WebsearchQueryOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
+  location: { directory: string; workspaceID?: string; project: { id: string; directory: string } }
   data: { providerID: string; results: Array<WebSearchResult> }
 }

packages/core/package.json

@@ -41,11 +41,6 @@
       "node": "./src/image/photon-wasm.node.ts",
       "default": "./src/image/photon-wasm.bun.ts"
     },
-    "#shell-parser-wasm": {
-      "bun": "./src/shell/parser-wasm.bun.ts",
-      "node": "./src/shell/parser-wasm.node.ts",
-      "default": "./src/shell/parser-wasm.bun.ts"
-    },
     "#process-lock-ffi": {
       "bun": "./src/util/process-lock-ffi.bun.ts",
       "node": "./src/util/process-lock-ffi.node.ts",
@@ -124,10 +119,7 @@
     "jsonc-parser": "3.3.1",
     "semver": "^7.6.3",
     "turndown": "7.2.0",
-    "tree-sitter-bash": "0.25.0",
-    "tree-sitter-powershell": "0.25.10",
     "venice-ai-sdk-provider": "2.1.1",
-    "web-tree-sitter": "0.25.10",
     "which": "6.0.1",
     "zod": "catalog:"
   },

packages/core/schema.json

@@ -1,9 +1,9 @@
 {
   "version": "7",
   "dialect": "sqlite",
-  "id": "e43ed7e2-b9fc-4178-beae-3646e4a976e1",
+  "id": "db37a97f-9b5e-4c87-be8b-4feace35136c",
   "prevIds": [
-    "db37a97f-9b5e-4c87-be8b-4feace35136c"
+    "a4ba73b4-21bc-41ab-a415-94e2ca38d798"
   ],
   "ddl": [
     {
@@ -1302,7 +1302,7 @@
     },
     {
       "type": "text",
-      "notNull": false,
+      "notNull": true,
       "autoincrement": false,
       "default": null,
       "generated": null,

packages/core/src/aisdk-native.ts

@@ -1,59 +0,0 @@
-export * as AISDKNative from "./aisdk-native"
-
-export interface Mapping {
-  readonly package: string
-  readonly settings: Readonly<Record<string, unknown>>
-}
-
-export function map(packageName: string | undefined, settings: Readonly<Record<string, unknown>>): Mapping | undefined {
-  const baseSettings = mapBaseSettings(settings)
-  switch (packageName) {
-    case "@ai-sdk/google":
-      return {
-        package: "@opencode-ai/ai/providers/google",
-        settings: {
-          ...baseSettings,
-          ...mapAPIKey(settings),
-          ...mapProviderOptions("gemini", settings),
-        },
-      }
-    case "@openrouter/ai-sdk-provider":
-      return {
-        package: "@opencode-ai/ai/providers/openrouter",
-        settings: {
-          ...baseSettings,
-          ...mapAPIKey(settings),
-          ...mapProviderOptions("openrouter", settings),
-        },
-      }
-    case "@ai-sdk/xai":
-      return {
-        package: "@opencode-ai/ai/providers/xai",
-        settings: {
-          ...baseSettings,
-          ...mapAPIKey(settings),
-          ...mapProviderOptions("xai", settings),
-        },
-      }
-  }
-}
-
-function mapBaseSettings(settings: Readonly<Record<string, unknown>>) {
-  return {
-    ...(typeof settings.baseURL === "string" ? { baseURL: settings.baseURL } : {}),
-  }
-}
-
-function mapAPIKey(settings: Readonly<Record<string, unknown>>) {
-  return typeof settings.apiKey === "string" ? { apiKey: settings.apiKey } : {}
-}
-
-function mapProviderOptions(namespace: string, settings: Readonly<Record<string, unknown>>) {
-  const values = Object.fromEntries(
-    Object.entries(settings).filter(
-      ([key]) => !["apiKey", "authToken", "baseURL", "chunkTimeout", "fetch", "timeout"].includes(key),
-    ),
-  )
-  if (Object.keys(values).length === 0) return {}
-  return { providerOptions: { [namespace]: values } }
-}

packages/core/src/database/migration.gen.ts

@@ -58,6 +58,5 @@ export const migrations = (
     import("./migration/20260722011141_delete_tool_progress_events"),
     import("./migration/20260722170000_canonical_tool_results"),
     import("./migration/20260729022634_session_fork_boundary"),
-    import("./migration/20260730195856_optional_session_title"),
   ])
 ).map((module) => module.default) satisfies DatabaseMigration.Migration[]

packages/core/src/database/migration/20260730195856_optional_session_title.ts

@@ -1,14 +0,0 @@
-import { Effect } from "effect"
-import type { DatabaseMigration } from "../migration"
-
-export default {
-  id: "20260730195856_optional_session_title",
-  up(tx) {
-    return Effect.gen(function* () {
-      yield* tx.run(`ALTER TABLE \`session\` RENAME COLUMN \`title\` TO \`title_old\``)
-      yield* tx.run(`ALTER TABLE \`session\` ADD COLUMN \`title\` text`)
-      yield* tx.run(`UPDATE \`session\` SET \`title\` = \`title_old\``)
-      yield* tx.run(`ALTER TABLE \`session\` DROP COLUMN \`title_old\``)
-    })
-  },
-} satisfies DatabaseMigration.Migration

packages/core/src/database/schema.gen.ts

@@ -217,7 +217,7 @@ export default {
           \`slug\` text NOT NULL,
           \`directory\` text NOT NULL,
           \`path\` text,
-          \`title\` text,
+          \`title\` text NOT NULL,
           \`version\` text NOT NULL,
           \`share_url\` text,
           \`summary_additions\` integer,

packages/core/src/file-mutation.ts

@@ -5,7 +5,6 @@ import { Context, Effect, Layer, Schema } from "effect"
 import { dirname } from "path"
 import { KeyedMutex } from "./effect/keyed-mutex"
 import { FSUtil } from "@opencode-ai/util/fs-util"
-import { Bom } from "@opencode-ai/util/bom"
 
 export interface Target {
   readonly canonical: string
@@ -109,13 +108,13 @@ const layer = Layer.effect(
     const writeTextPreservingBom = Effect.fn("FileMutation.writeTextPreservingBom")((input: TextWriteInput) =>
       withTargetLock(input.target)(
         Effect.gen(function* () {
-          const next = Bom.split(input.content)
+          const next = splitBom(input.content)
           const current = yield* fs
             .readFile(input.target.canonical)
             .pipe(Effect.catchReason("PlatformError", "NotFound", () => Effect.succeed(undefined)))
           yield* fs.writeWithDirs(
             input.target.canonical,
-            Bom.join(next.text, Boolean(current && Bom.has(current)) || next.bom),
+            joinBom(next.text, Boolean(current && hasUtf8Bom(current)) || next.bom),
           )
           return writeResult(input.target, current !== undefined)
         }),
@@ -173,6 +172,20 @@ const layer = Layer.effect(
   }),
 )
 
+function splitBom(text: string) {
+  const stripped = text.replace(/^\uFEFF+/, "")
+  return { bom: stripped.length !== text.length, text: stripped }
+}
+
+function joinBom(text: string, bom: boolean) {
+  const stripped = splitBom(text).text
+  return bom ? `\uFEFF${stripped}` : stripped
+}
+
+function hasUtf8Bom(content: Uint8Array) {
+  return content[0] === 0xef && content[1] === 0xbb && content[2] === 0xbf
+}
+
 function sameBytes(left: Uint8Array, right: Uint8Array) {
   if (left.length !== right.length) return false
   return left.every((byte, index) => byte === right[index])

packages/core/src/formatter.ts

@@ -1,154 +0,0 @@
-export * as Formatter from "./formatter"
-
-import { Context, Effect, Layer, Schema } from "effect"
-import { ChildProcess } from "effect/unstable/process"
-import path from "path"
-import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
-import { FSUtil } from "@opencode-ai/util/fs-util"
-import { Npm } from "@opencode-ai/util/npm"
-import { AppProcess } from "@opencode-ai/util/process"
-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>
-}
-
-export class Service extends Context.Service<Service, Interface>()("@opencode/v2/Formatter") {}
-
-const layer = Layer.effect(
-  Service,
-  Effect.gen(function* () {
-    const config = yield* Config.Service
-    const fs = yield* FSUtil.Service
-    const location = yield* Location.Service
-    const npm = yield* Npm.Service
-    const processes = yield* AppProcess.Service
-    const commands = new Map<string, string[] | false>()
-    let formatters: Info[] = []
-
-    const load = yield* Effect.cached(
-      Effect.gen(function* () {
-        const configured = Config.latest(yield* config.entries(), "formatter")
-        if (!configured) {
-          yield* Effect.logInfo("all formatters are disabled")
-          return
-        }
-
-        const builtIns = make({
-          directory: location.directory,
-          worktree: location.project.directory,
-          fs,
-          npm,
-          processes,
-        })
-        formatters = builtIns
-        if (configured === true) return
-
-        for (const [name, entry] of Object.entries(configured)) {
-          const index = formatters.findIndex((formatter) => formatter.name === name)
-          if (entry.disabled) {
-            if (index !== -1) formatters.splice(index, 1)
-            continue
-          }
-
-          const builtIn = builtIns.find((formatter) => formatter.name === name)
-          const formatter: Info = {
-            name,
-            extensions: entry.extensions ?? builtIn?.extensions ?? [],
-            environment: { ...builtIn?.environment, ...entry.environment },
-            enabled:
-              builtIn && !entry.command ? builtIn.enabled : Effect.succeed(entry.command ? [...entry.command] : false),
-          }
-          if (index === -1) formatters.push(formatter)
-          else formatters[index] = formatter
-        }
-      }).pipe(Effect.withSpan("Formatter.load")),
-    )
-
-    const command = Effect.fnUntraced(function* (formatter: Info) {
-      const cached = commands.get(formatter.name)
-      if (cached !== undefined) return cached
-      const result = yield* formatter.enabled
-      if (result !== false) commands.set(formatter.name, result)
-      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) =>
-        formatter.extensions.includes(path.extname(filepath)),
-      )
-
-      for (const formatter of matching) {
-        const enabled = yield* command(formatter)
-        if (enabled === false) continue
-        const cmd = enabled.map((argument) => argument.replace("$FILE", filepath))
-        yield* Effect.logInfo("formatting file", { file: filepath, command: cmd })
-        const result = yield* processes
-          .run(
-            ChildProcess.make(cmd[0], cmd.slice(1), {
-              cwd: location.directory,
-              env: formatter.environment,
-              extendEnv: true,
-              stdin: "ignore",
-              stdout: "ignore",
-              stderr: "ignore",
-            }),
-          )
-          .pipe(
-            Effect.catch((error) =>
-              Effect.logError("failed to format file", {
-                file: filepath,
-                command: cmd,
-                error: error.message,
-              }).pipe(Effect.as(undefined)),
-            ),
-          )
-        if (!result) continue
-        if (result.exitCode === 0) return true
-        yield* Effect.logError("formatter exited unsuccessfully", {
-          file: filepath,
-          command: cmd,
-          exitCode: result.exitCode,
-        })
-      }
-      return false
-    })
-
-    return Service.of({ init, status, file })
-  }),
-)
-
-export const node = makeLocationNode({
-  service: Service,
-  layer,
-  deps: [Config.node, FSUtil.node, Location.node, Npm.node, AppProcess.node],
-})

packages/core/src/formatter/builtins.ts

@@ -1,314 +0,0 @@
-import { Effect } from "effect"
-import { ChildProcess } from "effect/unstable/process"
-import { FSUtil } from "@opencode-ai/util/fs-util"
-import { Npm } from "@opencode-ai/util/npm"
-import { AppProcess } from "@opencode-ai/util/process"
-import { which } from "../util/which"
-
-export interface Info {
-  readonly name: string
-  readonly environment?: Record<string, string>
-  readonly extensions: readonly string[]
-  readonly enabled: Effect.Effect<string[] | false>
-}
-
-export function make(input: {
-  readonly directory: string
-  readonly worktree: string
-  readonly fs: FSUtil.Interface
-  readonly npm: Npm.Interface
-  readonly processes: AppProcess.Interface
-}) {
-  const disabled = false as const
-  const findUp = (target: string) => input.fs.findUp(target, input.directory, input.worktree)
-  const readText = (file: string) => input.fs.readFileString(file).pipe(Effect.orElseSucceed(() => ""))
-  const commandOutput = (command: string[]) =>
-    input.processes
-      .run(
-        ChildProcess.make(command[0], command.slice(1), {
-          cwd: input.directory,
-          extendEnv: true,
-          stdin: "ignore",
-        }),
-      )
-      .pipe(Effect.option)
-
-  const gofmt: Info = {
-    name: "gofmt",
-    extensions: [".go"],
-    enabled: Effect.sync(() => {
-      const match = which("gofmt")
-      return match ? [match, "-w", "$FILE"] : disabled
-    }),
-  }
-
-  const mix: Info = {
-    name: "mix",
-    extensions: [".ex", ".exs", ".eex", ".heex", ".leex", ".neex", ".sface"],
-    enabled: Effect.sync(() => {
-      const match = which("mix")
-      return match ? [match, "format", "$FILE"] : disabled
-    }),
-  }
-
-  const prettier: Info = {
-    name: "prettier",
-    environment: { BUN_BE_BUN: "1" },
-    extensions: [
-      ".js",
-      ".jsx",
-      ".mjs",
-      ".cjs",
-      ".ts",
-      ".tsx",
-      ".mts",
-      ".cts",
-      ".html",
-      ".htm",
-      ".css",
-      ".scss",
-      ".sass",
-      ".less",
-      ".vue",
-      ".svelte",
-      ".json",
-      ".jsonc",
-      ".yaml",
-      ".yml",
-      ".toml",
-      ".xml",
-      ".md",
-      ".mdx",
-      ".graphql",
-      ".gql",
-    ],
-    enabled: Effect.gen(function* () {
-      for (const file of yield* findUp("package.json")) {
-        if (!hasDependency(yield* input.fs.readJson(file), "prettier")) continue
-        const bin = yield* input.npm.which("prettier")
-        if (bin) return [bin, "--write", "$FILE"]
-      }
-      return disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const oxfmt: Info = {
-    name: "oxfmt",
-    environment: { BUN_BE_BUN: "1" },
-    extensions: [".js", ".jsx", ".mjs", ".cjs", ".ts", ".tsx", ".mts", ".cts"],
-    enabled: Effect.gen(function* () {
-      for (const file of yield* findUp("package.json")) {
-        if (!hasDependency(yield* input.fs.readJson(file), "oxfmt")) continue
-        const bin = yield* input.npm.which("oxfmt")
-        if (bin) return [bin, "$FILE"]
-      }
-      return disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const biome: Info = {
-    name: "biome",
-    environment: { BUN_BE_BUN: "1" },
-    extensions: [
-      ".js",
-      ".jsx",
-      ".mjs",
-      ".cjs",
-      ".ts",
-      ".tsx",
-      ".mts",
-      ".cts",
-      ".html",
-      ".htm",
-      ".css",
-      ".scss",
-      ".sass",
-      ".less",
-      ".vue",
-      ".svelte",
-      ".json",
-      ".jsonc",
-      ".yaml",
-      ".yml",
-      ".toml",
-      ".xml",
-      ".md",
-      ".mdx",
-      ".graphql",
-      ".gql",
-    ],
-    enabled: Effect.gen(function* () {
-      const found = yield* Effect.forEach(["biome.json", "biome.jsonc"], findUp, { concurrency: "unbounded" })
-      if (!found.some((items) => items.length > 0)) return disabled
-      const bin = yield* input.npm.which("@biomejs/biome")
-      return bin ? [bin, "format", "--write", "$FILE"] : disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const zig: Info = {
-    name: "zig",
-    extensions: [".zig", ".zon"],
-    enabled: Effect.sync(() => {
-      const match = which("zig")
-      return match ? [match, "fmt", "$FILE"] : disabled
-    }),
-  }
-
-  const clang: Info = {
-    name: "clang-format",
-    extensions: [".c", ".cc", ".cpp", ".cxx", ".c++", ".h", ".hh", ".hpp", ".hxx", ".h++", ".ino", ".C", ".H"],
-    enabled: Effect.gen(function* () {
-      if (!(yield* findUp(".clang-format")).length) return disabled
-      const match = which("clang-format")
-      return match ? [match, "-i", "$FILE"] : disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const ktlint: Info = {
-    name: "ktlint",
-    extensions: [".kt", ".kts"],
-    enabled: Effect.sync(() => {
-      const match = which("ktlint")
-      return match ? [match, "-F", "$FILE"] : disabled
-    }),
-  }
-
-  const ruff: Info = {
-    name: "ruff",
-    extensions: [".py", ".pyi"],
-    enabled: Effect.gen(function* () {
-      if (!which("ruff")) return disabled
-      for (const config of ["pyproject.toml", "ruff.toml", ".ruff.toml"]) {
-        const found = yield* findUp(config)
-        if (!found.length) continue
-        if (config !== "pyproject.toml" || (yield* readText(found[0])).includes("[tool.ruff]")) {
-          return ["ruff", "format", "$FILE"]
-        }
-      }
-      for (const dependency of ["requirements.txt", "pyproject.toml", "Pipfile"]) {
-        const found = yield* findUp(dependency)
-        if (found.length && (yield* readText(found[0])).includes("ruff")) return ["ruff", "format", "$FILE"]
-      }
-      return disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const air: Info = {
-    name: "air",
-    extensions: [".R"],
-    enabled: Effect.gen(function* () {
-      const bin = which("air")
-      if (!bin) return disabled
-      const output = yield* commandOutput([bin, "--help"])
-      if (output._tag === "None" || output.value.exitCode !== 0) return disabled
-      const first = output.value.stdout.toString("utf8").split("\n")[0]
-      return first.includes("R language") && first.includes("formatter") ? [bin, "format", "$FILE"] : disabled
-    }),
-  }
-
-  const uv: Info = {
-    name: "uv",
-    extensions: [".py", ".pyi"],
-    enabled: Effect.gen(function* () {
-      const bin = which("uv")
-      if (!bin) return disabled
-      const output = yield* commandOutput([bin, "format", "--help"])
-      return output._tag === "Some" && output.value.exitCode === 0
-        ? [bin, "format", "--", "$FILE"]
-        : disabled
-    }),
-  }
-
-  const rubocop = executable("rubocop", [".rb", ".rake", ".gemspec", ".ru"], ["--autocorrect", "$FILE"])
-  const standardrb = executable("standardrb", [".rb", ".rake", ".gemspec", ".ru"], ["--fix", "$FILE"])
-  const htmlbeautifier = executable("htmlbeautifier", [".erb", ".html.erb"], ["$FILE"])
-  const dart = executable("dart", [".dart"], ["format", "$FILE"])
-
-  const ocamlformat: Info = {
-    name: "ocamlformat",
-    extensions: [".ml", ".mli"],
-    enabled: Effect.gen(function* () {
-      if (!(yield* findUp(".ocamlformat")).length) return disabled
-      const match = which("ocamlformat")
-      return match ? [match, "-i", "$FILE"] : disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const terraform = executable("terraform", [".tf", ".tfvars"], ["fmt", "$FILE"])
-  const latexindent = executable("latexindent", [".tex"], ["-w", "-s", "$FILE"])
-  const gleam = executable("gleam", [".gleam"], ["format", "$FILE"])
-  const shfmt = executable("shfmt", [".sh", ".bash"], ["-w", "$FILE"])
-  const nixfmt = executable("nixfmt", [".nix"], ["$FILE"])
-  const rustfmt = executable("rustfmt", [".rs"], ["$FILE"])
-
-  const pint: Info = {
-    name: "pint",
-    extensions: [".php"],
-    enabled: Effect.gen(function* () {
-      for (const file of yield* findUp("composer.json")) {
-        const json = yield* input.fs.readJson(file)
-        if (hasRecordKey(json, "require", "laravel/pint") || hasRecordKey(json, "require-dev", "laravel/pint")) {
-          return ["./vendor/bin/pint", "$FILE"]
-        }
-      }
-      return disabled
-    }).pipe(Effect.orElseSucceed(() => disabled)),
-  }
-
-  const ormolu = executable("ormolu", [".hs"], ["-i", "$FILE"])
-  const cljfmt = executable("cljfmt", [".clj", ".cljs", ".cljc", ".edn"], ["fix", "--quiet", "$FILE"])
-  const dfmt = executable("dfmt", [".d"], ["-i", "$FILE"])
-
-  return [
-    gofmt,
-    mix,
-    oxfmt,
-    prettier,
-    biome,
-    zig,
-    clang,
-    ktlint,
-    ruff,
-    air,
-    uv,
-    rubocop,
-    standardrb,
-    htmlbeautifier,
-    dart,
-    ocamlformat,
-    terraform,
-    latexindent,
-    gleam,
-    shfmt,
-    nixfmt,
-    rustfmt,
-    pint,
-    ormolu,
-    cljfmt,
-    dfmt,
-  ] satisfies Info[]
-}
-
-function executable(name: string, extensions: readonly string[], args: string[]): Info {
-  return {
-    name,
-    extensions,
-    enabled: Effect.sync(() => {
-      const match = which(name)
-      return match ? [match, ...args] : false
-    }),
-  }
-}
-
-function hasDependency(input: unknown, dependency: string) {
-  return hasRecordKey(input, "dependencies", dependency) || hasRecordKey(input, "devDependencies", dependency)
-}
-
-function hasRecordKey(input: unknown, field: string, key: string) {
-  if (!isRecord(input)) return false
-  return isRecord(input[field]) && key in input[field]
-}
-
-function isRecord(input: unknown): input is Record<string, unknown> {
-  return Boolean(input && typeof input === "object" && !Array.isArray(input))
-}

packages/core/src/git.ts

@@ -201,7 +201,7 @@ const layer = Layer.effect(
       locks.withLock(repository.gitDirectory)(effect)
 
     const discover = Effect.fn("Git.repo.discover")(function* (input: AbsolutePath) {
-      const dotgit = yield* fs.up({ targets: [".git"], start: input, mode: "first" }).pipe(
+      const dotgit = yield* fs.up({ targets: [".git"], start: input }).pipe(
         Effect.map((matches) => matches[0]),
         Effect.catch(() => Effect.succeed(undefined)),
       )

packages/core/src/location-services.ts

@@ -8,7 +8,6 @@ import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { Node } from "@opencode-ai/util/effect/app-node"
 import { Bus } from "./bus"
 import { FileMutation } from "./file-mutation"
-import { Formatter } from "./formatter"
 import { FileSystem } from "./filesystem"
 import { FileSystemSearch } from "./filesystem/search"
 import { Generate } from "./generate"
@@ -74,7 +73,6 @@ const locationServiceNodes = [
   InstructionDiscovery.node,
   LocationMutation.node,
   FileMutation.node,
-  Formatter.node,
   MCP.node,
   Permission.node,
   Tool.node,

packages/core/src/location.ts

@@ -25,7 +25,7 @@ const layer = (ref: Ref) =>
       return Service.of({
         directory: ref.directory,
         workspaceID: ref.workspaceID,
-        project: { id: resolved.id, directory: resolved.directory, canonical: resolved.canonical },
+        project: { id: resolved.id, directory: resolved.directory },
         vcs: resolved.vcs,
       })
     }),

packages/core/src/model-resolver.ts

@@ -12,7 +12,6 @@ import { Auth, type AnyRoute } from "@opencode-ai/ai/route"
 import { Context, Effect, Layer, Schema } from "effect"
 import { produce } from "immer"
 import { AISDK } from "./aisdk"
-import { AISDKNative } from "./aisdk-native"
 import { Catalog } from "./catalog"
 import { Credential } from "./credential"
 import { Integration } from "./integration"
@@ -183,10 +182,7 @@ export const fromCatalogModel = (
         .model({ id: resolved.modelID ?? resolved.id, compatibility: resolved.compatibility }),
     )
   }
-  const configured = { ...resolved.settings, ...credential?.metadata }
-  const mapping = Provider.isAISDK(resolved.package) ? AISDKNative.map(packageName, configured) : undefined
-  const native = mapping?.package ?? resolved.package
-  if (Provider.isAISDK(resolved.package) && !mapping) {
+  if (Provider.isAISDK(resolved.package)) {
     if (!dependencies?.loadAISDK) return Effect.fail(unsupported(resolved))
     const runtime = produce(resolved, (draft) => {
       draft.settings = Provider.mergeOverlay(draft.settings, {
@@ -197,16 +193,16 @@ export const fromCatalogModel = (
     })
     return dependencies.loadAISDK(runtime).pipe(Effect.mapError(() => unsupported(resolved)))
   }
-  if (!native) return Effect.fail(unsupported(resolved))
+  if (!resolved.package) return Effect.fail(unsupported(resolved))
 
-  const specifier = native
+  const specifier = resolved.package
   return Effect.gen(function* () {
     const module = yield* (dependencies?.loadPackage ?? Provider.loadPackage)(specifier).pipe(
       Effect.mapError(() => unsupported(resolved)),
     )
-    const mapped = mapping?.settings ?? configured
+    const configured = { ...resolved.settings, ...credential?.metadata }
     const settings = {
-      ...(credential ? withoutNativeAuthSettings(mapped) : mapped),
+      ...(credential ? withoutNativeAuthSettings(configured) : configured),
       ...nativeCredentialSettings(specifier, credential),
       headers: resolved.headers,
       body: resolved.body,

packages/core/src/plugin/agent.ts

@@ -11,6 +11,8 @@ import { Permission } from "../permission"
 // Combined output files written by the Shell service, e.g. `<data>/shell/<projectID>/<shellID>.out`.
 // Whitelisted so agents can read a command's full captured output without an external-directory prompt.
 const SHELL_OUTPUT_GLOB = path.join(Global.Path.data, "shell", "*", "*")
+const BUILD_SYSTEM =
+  "You are an AI coding agent. Help the user accomplish software engineering tasks by inspecting the workspace, making targeted changes, and using tools according to the configured permissions."
 
 const PROMPT_EXPLORE = `You are a file search specialist. You excel at thoroughly navigating and exploring codebases.
 

packages/core/src/plugin/internal.ts

@@ -16,7 +16,6 @@ import { ConfigSkillPlugin } from "../config/plugin/skill"
 import { ConfigWebSearchPlugin } from "../config/plugin/websearch"
 import { Bus } from "../bus"
 import { FileMutation } from "../file-mutation"
-import { Formatter } from "../formatter"
 import { Form } from "../form"
 import { FileSystem } from "../filesystem"
 import { FSUtil } from "@opencode-ai/util/fs-util"
@@ -69,7 +68,6 @@ const services = Effect.fn("PluginInternal.services")(function* () {
   const config = yield* Config.Service
   const bus = yield* Bus.Service
   const mutation = yield* FileMutation.Service
-  const formatter = yield* Formatter.Service
   const filesystem = yield* FileSystem.Service
   const fs = yield* FSUtil.Service
   const global = yield* Global.Service
@@ -100,7 +98,6 @@ const services = Effect.fn("PluginInternal.services")(function* () {
     Context.make(Config.Service, config),
     Context.make(Bus.Service, bus),
     Context.make(FileMutation.Service, mutation),
-    Context.make(Formatter.Service, formatter),
     Context.make(FileSystem.Service, filesystem),
     Context.make(FSUtil.Service, fs),
     Context.make(Global.Service, global),

packages/core/src/plugin/supervisor.ts

@@ -14,7 +14,6 @@ import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { httpClient } from "@opencode-ai/util/effect/app-node-platform"
 import { Bus } from "../bus"
 import { FileMutation } from "../file-mutation"
-import { Formatter } from "../formatter"
 import { FileSystem } from "../filesystem"
 import { Watcher } from "../filesystem/watcher"
 import { Form } from "../form"
@@ -319,7 +318,6 @@ export const node = makeLocationNode({
     Config.node,
     Bus.node,
     FileMutation.node,
-    Formatter.node,
     FileSystem.node,
     FSUtil.node,
     Global.node,

packages/core/src/project.ts

@@ -2,7 +2,7 @@ export * as Project from "./project"
 
 import { Context, Effect, Layer, Schema } from "effect"
 import { ChildProcess } from "effect/unstable/process"
-import { asc, desc, isNotNull, isNull, ne, or } from "drizzle-orm"
+import { asc, desc } from "drizzle-orm"
 import path from "path"
 import { AbsolutePath } from "./schema"
 import { Database } from "./database/database"
@@ -40,7 +40,6 @@ export interface Resolved {
   readonly previous?: ID
   readonly id: ID
   readonly directory: AbsolutePath
-  readonly canonical: AbsolutePath
   readonly vcs?: Vcs
 }
 
@@ -49,7 +48,7 @@ export const root = Effect.fn("Project.root")(function* (
   fs: FSUtil.Interface,
   input: AbsolutePath,
 ) {
-  return yield* fs.up({ targets: [".git", ".hg"], start: input, mode: "first" }).pipe(
+  return yield* fs.up({ targets: [".git", ".hg"], start: input }).pipe(
     Effect.map((matches) => matches[0] ? AbsolutePath.make(path.dirname(matches[0])) : undefined),
     Effect.catch(() => Effect.succeed(undefined)),
   )
@@ -84,7 +83,7 @@ function fromRow(row: typeof ProjectTable.$inferSelect): Info {
       : undefined
   return {
     id: row.id,
-    canonical: row.worktree,
+    worktree: row.worktree,
     vcs: row.vcs ?? undefined,
     name: row.name ?? undefined,
     icon,
@@ -107,40 +106,6 @@ const layer = Layer.effect(
     const db = (yield* Database.Service).db
     const projectDirectories = yield* ProjectDirectories.Service
 
-    const persist = Effect.fnUntraced(function* (project: Resolved) {
-      yield* db
-        .transaction((tx) =>
-          Effect.gen(function* () {
-            const vcs = project.vcs?.type
-            yield* tx
-              .insert(ProjectTable)
-              .values({ id: project.id, worktree: project.canonical, vcs, sandboxes: [] })
-              .onConflictDoUpdate({
-                target: ProjectTable.id,
-                set: { worktree: project.canonical, vcs: vcs ?? null },
-                setWhere: or(
-                  ne(ProjectTable.worktree, project.canonical),
-                  vcs ? or(isNull(ProjectTable.vcs), ne(ProjectTable.vcs, vcs)) : isNotNull(ProjectTable.vcs),
-                ),
-              })
-              .run()
-            if (!project.vcs) return
-            yield* projectDirectories.create({ projectID: project.id, directory: project.canonical }, tx)
-            if (project.directory === project.canonical) return
-            yield* projectDirectories.create(
-              {
-                projectID: project.id,
-                directory: project.directory,
-                strategy: project.vcs.type === "git" ? "git_worktree" : undefined,
-              },
-              tx,
-            )
-          }),
-        )
-        .pipe(Effect.orDie)
-      return project
-    })
-
     const list = Effect.fn("Project.list")(function* () {
       const rows = yield* db
         .select()
@@ -224,7 +189,7 @@ const layer = Layer.effect(
     })
 
     const hgDiscover = Effect.fnUntraced(function* (input: AbsolutePath) {
-      const dotHg = yield* fs.up({ targets: [".hg"], start: input, mode: "first" }).pipe(
+      const dotHg = yield* fs.up({ targets: [".hg"], start: input }).pipe(
         Effect.map((matches) => matches[0]),
         Effect.catch(() => Effect.succeed(undefined)),
       )
@@ -246,26 +211,17 @@ const layer = Layer.effect(
       if (repo) {
         const previous = yield* cached(repo.commonDirectory)
         const id = (yield* remote(repo)) ?? previous ?? (yield* root(repo))
-        const canonical =
-          repo.gitDirectory === repo.commonDirectory
-            ? repo.worktree
-            : yield* git.worktree.list(repo).pipe(
-                Effect.map((items) => items.find((item) => item.kind === "main")?.directory ?? repo.worktree),
-                Effect.catch(() => Effect.succeed(repo.worktree)),
-              )
-        return yield* persist({
+        return {
           previous,
           id: id ?? ID.global,
           directory: repo.worktree,
-          canonical,
           vcs: { type: "git" as const, store: repo.commonDirectory },
-        })
+        }
       }
 
       const hg = yield* hgDiscover(input)
-      if (hg) return yield* persist({ ...hg, canonical: hg.directory })
-      const directory = AbsolutePath.make(path.parse(input).root)
-      return yield* persist({ id: ID.global, directory, canonical: directory, vcs: undefined })
+      if (hg) return hg
+      return { id: ID.global, directory: AbsolutePath.make(path.parse(input).root), vcs: undefined }
     })
 
     const commit = Effect.fn("Project.commit")(function* (input: { store: AbsolutePath; id: ID }) {

packages/core/src/session.ts

@@ -3,7 +3,7 @@ export * from "./session/schema"
 
 import { Effect, Layer, Schema, Context, Stream, Scope } from "effect"
 import { ListAnchor } from "@opencode-ai/schema/session"
-import { and, asc, desc, eq, gt, isNotNull, isNull, like, lt, ne, or, type SQL } from "drizzle-orm"
+import { and, asc, desc, eq, gt, isNull, like, lt, or, type SQL } from "drizzle-orm"
 import { Project } from "./project"
 import { Workspace } from "./workspace"
 import { Model } from "./model"
@@ -325,22 +325,6 @@ const layer = Layer.effect(
     const shellLocks = KeyedMutex.makeUnsafe<SessionSchema.ID>()
     const decodeMessage = Schema.decodeUnknownEffect(SessionMessage.Info)
     const isDurableSessionEvent = Schema.is(SessionEvent.Durable)
-    const persistProject = (project: Project.Resolved) => {
-      const vcs = project.vcs?.type
-      return db
-        .insert(ProjectTable)
-        .values({ id: project.id, worktree: project.canonical, vcs, sandboxes: [] })
-        .onConflictDoUpdate({
-          target: ProjectTable.id,
-          set: { worktree: project.canonical, vcs: vcs ?? null },
-          setWhere: or(
-            ne(ProjectTable.worktree, project.canonical),
-            vcs ? or(isNull(ProjectTable.vcs), ne(ProjectTable.vcs, vcs)) : isNotNull(ProjectTable.vcs),
-          ),
-        })
-        .run()
-        .pipe(Effect.orDie)
-    }
     const decode = (row: typeof SessionMessageTable.$inferSelect) =>
       decodeMessage({ ...row.data, id: row.id, type: row.type }).pipe(
         Effect.mapError(
@@ -363,7 +347,12 @@ const layer = Layer.effect(
         if (location === undefined)
           return yield* Effect.die(new Error("Session.create requires either location or an existing parentID"))
         const project = yield* projects.resolve(location.directory)
-        yield* persistProject(project)
+        yield* db
+          .insert(ProjectTable)
+          .values({ id: project.id, worktree: project.directory, vcs: project.vcs?.type, sandboxes: [] })
+          .onConflictDoNothing()
+          .run()
+          .pipe(Effect.orDie)
         const now = Date.now()
         const info = SessionV1.SessionInfo.make({
           id: sessionID,
@@ -374,7 +363,7 @@ const layer = Layer.effect(
           directory: location.directory,
           path: path.relative(project.directory, location.directory).replaceAll("\\", "/"),
           workspaceID: location.workspaceID ? Workspace.ID.make(location.workspaceID) : undefined,
-          title: input.title,
+          title: input.title ?? `New session - ${new Date(now).toISOString()}`,
           agent: input.agent,
           model: input.model
             ? {
@@ -462,7 +451,6 @@ const layer = Layer.effect(
         if ("directory" in input) conditions.push(eq(SessionTable.directory, input.directory))
         if (input.workspaceID) conditions.push(eq(SessionTable.workspace_id, input.workspaceID))
         if ("project" in input) conditions.push(eq(SessionTable.project_id, input.project))
-        if ("project" in input && input.subpath !== undefined) conditions.push(eq(SessionTable.path, input.subpath))
         if (input.search) conditions.push(like(SessionTable.title, `%${input.search}%`))
         if (input.parentID !== undefined)
           conditions.push(
@@ -744,7 +732,12 @@ const layer = Layer.effect(
         )
           return
         const project = yield* projects.resolve(directory)
-        yield* persistProject(project)
+        yield* db
+          .insert(ProjectTable)
+          .values({ id: project.id, worktree: project.directory, vcs: project.vcs?.type, sandboxes: [] })
+          .onConflictDoNothing()
+          .run()
+          .pipe(Effect.orDie)
         if ((yield* execution.active).has(input.sessionID)) {
           yield* execution.interrupt(input.sessionID)
           yield* execution.awaitIdle(input.sessionID)

packages/core/src/session/history.ts

@@ -117,20 +117,21 @@ export const preview = Effect.fn("SessionHistory.preview")(function* (
     .pipe(Effect.catch((error) => (error instanceof Instructions.InitializationBlocked ? error : Effect.die(error))))
 })
 
-/** Returns the session's first user message. */
-export const firstUserMessage = Effect.fn("SessionHistory.firstUserMessage")(function* (
+/** Returns the session's sole user message, or `undefined` once a second one exists. */
+export const firstUserMessageIfOnly = Effect.fn("SessionHistory.firstUserMessageIfOnly")(function* (
   db: DatabaseService,
   sessionID: SessionSchema.ID,
 ) {
-  const row = yield* db
+  const rows = yield* db
     .select()
     .from(SessionMessageTable)
     .where(and(eq(SessionMessageTable.session_id, sessionID), eq(SessionMessageTable.type, "user")))
     .orderBy(asc(SessionMessageTable.seq))
-    .get()
+    .limit(2)
+    .all()
     .pipe(Effect.orDie)
-  if (!row) return undefined
-  const message = yield* decodeMessageRow(row).pipe(Effect.catch(() => Effect.succeed(undefined)))
+  if (rows.length !== 1) return undefined
+  const message = yield* decodeMessageRow(rows[0]).pipe(Effect.catch(() => Effect.succeed(undefined)))
   return message?.type === "user" ? message : undefined
 })
 

packages/core/src/session/info.ts

@@ -17,7 +17,7 @@ export function fromRow(row: typeof SessionTable.$inferSelect): SessionSchema.In
   return SessionSchema.Info.make({
     id: SessionSchema.ID.make(row.id),
     projectID: Project.ID.make(row.project_id),
-    title: row.title ?? undefined,
+    title: row.title,
     parentID: row.parent_id ? SessionSchema.ID.make(row.parent_id) : undefined,
     fork:
       row.fork_session_id && row.fork_boundary

packages/core/src/session/projector.ts

@@ -43,8 +43,7 @@ type Usage = {
 
 const ForkBatchSize = 500
 
-const forkTitle = (value?: string) => {
-  if (value === undefined) return
+const forkTitle = (value: string) => {
   const match = value.match(/^(.+) \(fork #(\d+)\)$/)
   if (match) return `${match[1]} (fork #${Number.parseInt(match[2], 10) + 1})`
   return `${value} (fork #1)`
@@ -217,7 +216,7 @@ const projectFork = Effect.fn("SessionProjector.projectFork")(function* (
       slug: Slug.create(),
       directory: parent.directory,
       path: parent.path,
-      title: forkTitle(parent.title ?? undefined),
+      title: forkTitle(parent.title),
       agent: parent.agent,
       model: parent.model,
       version: parent.version,
@@ -658,12 +657,6 @@ const layer = Layer.effectDiscard(
           input: event.data.input,
           timeCreated: event.created,
         })
-        yield* db
-          .update(SessionTable)
-          .set({ time_updated: DateTime.toEpochMillis(event.created) })
-          .where(eq(SessionTable.id, event.data.sessionID))
-          .run()
-          .pipe(Effect.orDie)
       }),
     )
     yield* bus.project(SessionEvent.Compaction.Admitted, (event) =>

packages/core/src/session/runner/llm.ts

@@ -93,9 +93,10 @@ const layer = Layer.effect(
     const db = (yield* Database.Service).db
     const compaction = yield* SessionCompaction.Service
     const title = yield* SessionTitle.Service
-    // Title generation is a side effect of a successful step; it must not delay continuation.
-    // The in-flight set coalesces overlapping steps while title presence records success durably.
-    const titlesRunning = new Set<SessionSchema.ID>()
+    // Title generation is a side effect of the first step; it must not delay step continuation.
+    // Tracked per process so repeated wakes before the second user message arrives don't
+    // re-fire a redundant LLM call; `SessionTitle` itself is idempotent based on durable history.
+    const titleStarted = new Set<SessionSchema.ID>()
     const forkTitle = yield* FiberSet.makeRuntime<never, void, never>()
     /**
      * Drains eligible manual compaction and user input until the Session becomes idle.
@@ -124,7 +125,7 @@ const layer = Layer.effect(
       let step = 1
       while (true) {
         const result = yield* runStep(sessionID, promotable, step)
-        if (step === 1) yield* startTitle(sessionID)
+        yield* startTitleOnce(sessionID)
         yield* runPendingCompaction(sessionID)
         if (!result.needsContinuation && !(yield* SessionPending.has(db, sessionID, "steer"))) return
         promotable = "steer"
@@ -480,20 +481,11 @@ const layer = Layer.effect(
       }
     })
 
-    /** Starts one title request at a time after a successful step makes user input visible. */
-    const startTitle = Effect.fnUntraced(function* (sessionID: SessionSchema.ID) {
-      if (titlesRunning.has(sessionID)) return
-      titlesRunning.add(sessionID)
-      forkTitle(
-        title.generateForFirstPrompt(sessionID).pipe(
-          Effect.ignore,
-          Effect.ensuring(
-            Effect.sync(() => {
-              titlesRunning.delete(sessionID)
-            }),
-          ),
-        ),
-      )
+    /** Fires title generation once per process after the first step makes a user message visible. */
+    const startTitleOnce = Effect.fnUntraced(function* (sessionID: SessionSchema.ID) {
+      if (titleStarted.has(sessionID)) return
+      titleStarted.add(sessionID)
+      forkTitle(title.generateForFirstPrompt(yield* getSession(sessionID)).pipe(Effect.ignore))
     })
 
     const getSession = Effect.fn("SessionRunner.getSession")(function* (sessionID: SessionSchema.ID) {

packages/core/src/session/sql.ts

@@ -36,7 +36,7 @@ export const SessionTable = sqliteTable(
     slug: text().notNull(),
     directory: directoryColumn().notNull(),
     path: pathColumn(),
-    title: text(),
+    title: text().notNull(),
     version: text().notNull(),
     share_url: text(),
     summary_additions: integer(),

packages/core/src/session/title.ts

@@ -1,7 +1,7 @@
 export * as SessionTitle from "./title"
 
 import { LLM, LLMClient, LLMError, LLMEvent, Message, type LLMRequest } from "@opencode-ai/ai"
-import { Context, DateTime, Effect, Layer, Stream } from "effect"
+import { Context, Effect, Layer, Stream } from "effect"
 import { Agent } from "../agent"
 import { Database } from "../database/database"
 import { Bus } from "../bus"
@@ -14,10 +14,8 @@ import { SessionModelHeaders } from "./model-headers"
 import { SessionRunnerModel } from "./runner/model"
 import { SessionSchema } from "./schema"
 import { SessionUsage } from "./usage"
-import { SessionStore } from "./store"
 
 const MAX_LENGTH = 100
-const titleChanged = Symbol("Session title changed")
 
 type Dependencies = {
   readonly app: App.Info
@@ -27,30 +25,24 @@ type Dependencies = {
   }
   readonly agents: Agent.Interface
   readonly models: SessionRunnerModel.Interface
-  readonly store: SessionStore.Interface
 }
 
 export interface Interface {
-  /** Generates a title from the session's first user message when the session remains untitled. */
-  readonly generateForFirstPrompt: (sessionID: SessionSchema.ID) => Effect.Effect<void>
+  /** Generates a title from the session's first user message and renames the session. Runs at most once per session. */
+  readonly generateForFirstPrompt: (session: SessionSchema.Info) => Effect.Effect<void>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/SessionTitle") {}
 
 const truncate = (value: string) => (value.length <= MAX_LENGTH ? value : `${value.slice(0, MAX_LENGTH - 3)}...`)
-const isUntitled = (session: SessionSchema.Info) =>
-  session.title === undefined || session.title === `New session - ${DateTime.formatIso(session.time.created)}`
 
 const make = (dependencies: Dependencies) => {
   const generateForFirstPrompt = Effect.fn("SessionTitle.generateForFirstPrompt")(function* (
     db: Database.Interface["db"],
-    sessionID: SessionSchema.ID,
+    session: SessionSchema.Info,
   ) {
-    const session = yield* dependencies.store.get(sessionID)
-    if (!session) return
     if (session.parentID) return
-    if (!isUntitled(session)) return
-    const firstUser = yield* SessionHistory.firstUserMessage(db, session.id)
+    const firstUser = yield* SessionHistory.firstUserMessageIfOnly(db, session.id)
     if (!firstUser) return
     const agent = yield* dependencies.agents.get(Agent.ID.make("title"))
     if (!agent) return
@@ -104,19 +96,10 @@ const make = (dependencies: Dependencies) => {
       .map((line) => line.trim())
       .find((line) => line.length > 0)
     if (!title) return
-    const expectedSequence = (yield* Bus.latestSequence(db, sessionID)) + 1
-    const current = yield* dependencies.store.get(sessionID)
-    if (!current || !isUntitled(current)) return
-    yield* dependencies.bus
-      .publish(
-        SessionEvent.Renamed,
-        {
-          sessionID: session.id,
-          title: truncate(title),
-        },
-        { commit: (sequence) => (sequence === expectedSequence ? Effect.void : Effect.die(titleChanged)) },
-      )
-      .pipe(Effect.catchDefect((defect) => (defect === titleChanged ? Effect.void : Effect.die(defect))))
+    yield* dependencies.bus.publish(SessionEvent.Renamed, {
+      sessionID: session.id,
+      title: truncate(title),
+    })
   })
   return { generateForFirstPrompt }
 }
@@ -128,12 +111,11 @@ export const layer = Layer.effect(
     const llm = yield* LLMClient.Service
     const agents = yield* Agent.Service
     const models = yield* SessionRunnerModel.Service
-    const store = yield* SessionStore.Service
     const database = yield* Database.Service
     const app = yield* App.Metadata
-    const title = make({ bus, llm, agents, models, store, app })
+    const title = make({ bus, llm, agents, models, app })
     return Service.of({
-      generateForFirstPrompt: (sessionID) => title.generateForFirstPrompt(database.db, sessionID),
+      generateForFirstPrompt: (session) => title.generateForFirstPrompt(database.db, session),
     })
   }),
 )
@@ -141,5 +123,5 @@ export const layer = Layer.effect(
 export const node = makeLocationNode({
   service: Service,
   layer,
-  deps: [Bus.node, llmClient, Agent.node, SessionRunnerModel.node, SessionStore.node, Database.node, App.node],
+  deps: [Bus.node, llmClient, Agent.node, SessionRunnerModel.node, Database.node, App.node],
 })

packages/core/src/shell.ts

@@ -35,6 +35,7 @@ type Active = {
   done: Deferred.Deferred<Info, NotFoundError>
   timeoutFiber?: Fiber.Fiber<void>
   timeout?: (duration: number) => Effect.Effect<void>
+  kill?: () => Effect.Effect<void>
 }
 
 /**
@@ -59,6 +60,8 @@ export interface Interface {
   readonly wait: (id: Shell.ID) => Effect.Effect<Shell.Info, NotFoundError>
   // Replaces the running command's timeout from now; zero clears it.
   readonly timeout: (id: Shell.ID, duration: number) => Effect.Effect<Shell.Info, NotFoundError>
+  // Stops a running command while retaining its terminal state and output.
+  readonly kill: (id: Shell.ID) => Effect.Effect<Shell.Info, NotFoundError>
   readonly output: (id: Shell.ID, input?: Shell.OutputInput) => Effect.Effect<Shell.Output, NotFoundError>
   readonly remove: (id: Shell.ID) => Effect.Effect<void, NotFoundError>
 }
@@ -120,6 +123,12 @@ export const layer = (options?: ShellSelect.Options) => Layer.effect(
       yield* removeSession(id)
     })
 
+    const kill = Effect.fn("Shell.kill")(function* (id: Shell.ID) {
+      const session = yield* require(id)
+      if (session.kill) yield* session.kill()
+      return yield* Deferred.await(session.done)
+    })
+
     const list = Effect.fn("Shell.list")(function* () {
       return Array.from(sessions.values())
         .filter((session) => session.info.status === "running")
@@ -313,6 +322,8 @@ export const layer = (options?: ShellSelect.Options) => Layer.effect(
                 )
               })
 
+            session.kill = () => finish("exited", undefined, handle.kill().pipe(Effect.catch(() => Effect.void)))
+
             yield* session.timeout(invocation.timeout)
 
             runFork(
@@ -335,7 +346,7 @@ export const layer = (options?: ShellSelect.Options) => Layer.effect(
       return session.info
     })
 
-    return Service.of({ name, create, list, get, wait, timeout, output, remove })
+    return Service.of({ name, create, list, get, wait, timeout, kill, output, remove })
   }),
 )
 

packages/core/src/shell/parse.ts

@@ -1,296 +0,0 @@
-export * as ShellParse from "./parse"
-
-import { Effect } from "effect"
-import { fileURLToPath } from "url"
-import os from "os"
-import path from "path"
-import type { Node } from "web-tree-sitter"
-import { shellParserWasm } from "#shell-parser-wasm"
-import { ShellSelect } from "./select"
-
-type Part = { type: string; text: string }
-const CWD = new Set(["cd", "chdir", "popd", "pushd", "push-location", "set-location"])
-const POWERSHELL_PATH_FLAGS = new Set(["-literalpath", "-path"])
-
-const ARITY: Record<string, number> = {
-  cat: 1,
-  cd: 1,
-  chmod: 1,
-  chown: 1,
-  cp: 1,
-  echo: 1,
-  env: 1,
-  export: 1,
-  grep: 1,
-  kill: 1,
-  killall: 1,
-  ln: 1,
-  ls: 1,
-  mkdir: 1,
-  mv: 1,
-  ps: 1,
-  pwd: 1,
-  rm: 1,
-  rmdir: 1,
-  sleep: 1,
-  source: 1,
-  tail: 1,
-  touch: 1,
-  unset: 1,
-  which: 1,
-  aws: 3,
-  az: 3,
-  bazel: 2,
-  brew: 2,
-  bun: 2,
-  "bun run": 3,
-  "bun x": 3,
-  cargo: 2,
-  "cargo add": 3,
-  "cargo run": 3,
-  cdk: 2,
-  cf: 2,
-  cmake: 2,
-  composer: 2,
-  consul: 2,
-  "consul kv": 3,
-  crictl: 2,
-  deno: 2,
-  "deno task": 3,
-  doctl: 3,
-  docker: 2,
-  "docker builder": 3,
-  "docker compose": 3,
-  "docker container": 3,
-  "docker image": 3,
-  "docker network": 3,
-  "docker volume": 3,
-  eksctl: 2,
-  "eksctl create": 3,
-  firebase: 2,
-  flyctl: 2,
-  gcloud: 3,
-  gh: 3,
-  git: 2,
-  "git config": 3,
-  "git remote": 3,
-  "git stash": 3,
-  go: 2,
-  gradle: 2,
-  helm: 2,
-  heroku: 2,
-  hugo: 2,
-  ip: 2,
-  "ip addr": 3,
-  "ip link": 3,
-  "ip netns": 3,
-  "ip route": 3,
-  kind: 2,
-  "kind create": 3,
-  kubectl: 2,
-  "kubectl kustomize": 3,
-  "kubectl rollout": 3,
-  kustomize: 2,
-  make: 2,
-  mc: 2,
-  "mc admin": 3,
-  minikube: 2,
-  mongosh: 2,
-  mysql: 2,
-  mvn: 2,
-  ng: 2,
-  npm: 2,
-  "npm exec": 3,
-  "npm init": 3,
-  "npm run": 3,
-  "npm view": 3,
-  npx: 2,
-  nvm: 2,
-  nx: 2,
-  openssl: 2,
-  "openssl req": 3,
-  "openssl x509": 3,
-  pip: 2,
-  pipenv: 2,
-  pnpm: 2,
-  "pnpm dlx": 3,
-  "pnpm exec": 3,
-  "pnpm run": 3,
-  poetry: 2,
-  podman: 2,
-  "podman container": 3,
-  "podman image": 3,
-  psql: 2,
-  pulumi: 2,
-  "pulumi stack": 3,
-  python: 2,
-  pyenv: 2,
-  rake: 2,
-  rbenv: 2,
-  "redis-cli": 2,
-  rustup: 2,
-  serverless: 2,
-  sfdx: 3,
-  skaffold: 2,
-  sls: 2,
-  sst: 2,
-  swift: 2,
-  systemctl: 2,
-  terraform: 2,
-  "terraform workspace": 3,
-  tmux: 2,
-  turbo: 2,
-  ufw: 2,
-  vault: 2,
-  "vault auth": 3,
-  "vault kv": 3,
-  vercel: 2,
-  volta: 2,
-  wp: 2,
-  yarn: 2,
-  "yarn dlx": 3,
-  "yarn run": 3,
-}
-
-export const scan = Effect.fn("ShellParse.scan")(function* (command: string, shell: string, cwd: string) {
-  const parsers = yield* Effect.promise(load)
-  const powershell = ShellSelect.ps(shell)
-  const tree = (powershell ? parsers.ps : parsers.bash).parse(command)
-  if (!tree) return yield* Effect.fail(new Error("Failed to parse shell command"))
-
-  return yield* Effect.acquireUseRelease(
-    Effect.succeed(tree),
-    (tree) =>
-      Effect.sync(() =>
-        tree.rootNode.descendantsOfType("command").reduce(
-          (result, node) => {
-            if (!node) return result
-            const command = parts(node)
-            const tokens = command.map((part) => part.text)
-            if (tokens.length === 0) return result
-            const name = powershell ? tokens[0].toLowerCase() : tokens[0]
-            if (CWD.has(name)) {
-              result.directories.push(...directoryArgs(command, powershell, cwd, shell))
-              return result
-            }
-            result.commands.push({
-              resource: (node.parent?.type === "redirected_statement" ? node.parent.text : node.text).trim(),
-              save: `${prefix(tokens).join(" ")} *`,
-            })
-            return result
-          },
-          { commands: [] as Array<{ resource: string; save: string }>, directories: [] as string[] },
-        ),
-      ),
-    (tree) => Effect.sync(() => tree.delete()),
-  )
-})
-
-function parts(node: Node) {
-  return Array.from({ length: node.childCount }).flatMap((_, index): Part[] => {
-    const child = node.child(index)
-    if (!child) return []
-    if (child.type === "command_elements")
-      return Array.from({ length: child.childCount }).flatMap((_, itemIndex): Part[] => {
-        const item = child.child(itemIndex)
-        if (!item || item.type === "command_argument_sep" || item.type === "redirection") return []
-        return [{ type: item.type, text: item.text }]
-      })
-    if (!["command_name", "command_name_expr", "word", "string", "raw_string", "concatenation"].includes(child.type))
-      return []
-    return [{ type: child.type, text: child.text }]
-  })
-}
-
-function directoryArgs(command: Part[], powershell: boolean, cwd: string, shell: string) {
-  if (!powershell)
-    return command
-      .slice(1)
-      .filter((part) => !part.text.startsWith("-"))
-      .map((part) => directoryArgument(part.text, powershell, cwd, shell))
-      .filter((part) => part !== undefined)
-
-  const directories: string[] = []
-  let path = false
-  for (const part of command.slice(1)) {
-    if (path) {
-      const value = directoryArgument(part.text, powershell, cwd, shell)
-      if (value) directories.push(value)
-      path = false
-      continue
-    }
-    if (part.type === "command_parameter") {
-      path = POWERSHELL_PATH_FLAGS.has(part.text.toLowerCase())
-      continue
-    }
-    const value = directoryArgument(part.text, powershell, cwd, shell)
-    if (value) directories.push(value)
-  }
-  return directories
-}
-
-function directoryArgument(value: string, powershell: boolean, cwd: string, shell: string) {
-  const quote = value[0]
-  const text = (quote === '"' || quote === "'") && value.at(-1) === quote ? value.slice(1, -1) : value
-  if (!powershell) return expandKnownDirectory(text)
-
-  // PowerShell exposes environment variables through $env:NAME and provides these
-  // automatic directory variables. Expand only values we can determine without executing code.
-  return expandKnownDirectory(
-    text
-      .replace(/\$\{env:([^}]+)\}/gi, (_, key: string) => environment(key) ?? "")
-      .replace(/\$env:([A-Za-z_][A-Za-z0-9_]*)/gi, (_, key: string) => environment(key) ?? "")
-      .replace(/\$(HOME|PWD|PSHOME)(?=$|[\\/])/gi, (_, key: string) => {
-        if (key.toUpperCase() === "HOME") return os.homedir()
-        if (key.toUpperCase() === "PWD") return cwd
-        return path.dirname(shell)
-      }),
-  )
-}
-
-function expandKnownDirectory(value: string) {
-  // Unknown shell expressions cannot be resolved safely during permission analysis.
-  if (value.includes("$") || value.includes("`") || value.startsWith("(")) return
-  if (value === "~") return os.homedir()
-  if (value.startsWith("~/") || value.startsWith("~\\")) return path.join(os.homedir(), value.slice(2))
-  return value
-}
-
-function environment(key: string) {
-  if (process.platform !== "win32") return process.env[key]
-  const name = Object.keys(process.env).find((item) => item.toLowerCase() === key.toLowerCase())
-  return name ? process.env[name] : undefined
-}
-
-function prefix(tokens: string[]) {
-  for (let length = tokens.length; length > 0; length--) {
-    const arity = ARITY[tokens.slice(0, length).join(" ")]
-    if (arity !== undefined) return tokens.slice(0, arity)
-  }
-  return tokens.slice(0, 1)
-}
-
-function resolve(asset: string) {
-  if (asset.startsWith("file://")) return fileURLToPath(asset)
-  if (path.isAbsolute(asset)) return asset
-  return fileURLToPath(new URL(asset, import.meta.url))
-}
-
-const load = (() => {
-  let loading: ReturnType<typeof initialize> | undefined
-  return () => (loading ??= initialize())
-})()
-
-async function initialize() {
-  const { Parser, Language } = await import("web-tree-sitter")
-  await Parser.init({ locateFile: () => resolve(shellParserWasm.runtime) })
-  const [bashLanguage, psLanguage] = await Promise.all([
-    Language.load(resolve(shellParserWasm.bash)),
-    Language.load(resolve(shellParserWasm.powershell)),
-  ])
-  const bash = new Parser()
-  bash.setLanguage(bashLanguage)
-  const ps = new Parser()
-  ps.setLanguage(psLanguage)
-  return { bash, ps }
-}

packages/core/src/shell/parser-wasm.bun.ts

@@ -1,8 +0,0 @@
-// @ts-ignore Bun embeds static file imports when compiling the CLI.
-import runtime from "web-tree-sitter/tree-sitter.wasm" with { type: "file" }
-// @ts-ignore Bun embeds static file imports when compiling the CLI.
-import bash from "tree-sitter-bash/tree-sitter-bash.wasm" with { type: "file" }
-// @ts-ignore Bun embeds static file imports when compiling the CLI.
-import powershell from "tree-sitter-powershell/tree-sitter-powershell.wasm" with { type: "file" }
-
-export const shellParserWasm = { runtime, bash, powershell }

packages/core/src/shell/parser-wasm.node.ts

@@ -1,12 +0,0 @@
-import { createRequire } from "node:module"
-
-const require = createRequire(import.meta.url)
-
-export const shellParserWasm = {
-  runtime: process.env.OPENCODE_TREE_SITTER_WASM_PATH ?? require.resolve("web-tree-sitter/tree-sitter.wasm"),
-  bash:
-    process.env.OPENCODE_TREE_SITTER_BASH_WASM_PATH ?? require.resolve("tree-sitter-bash/tree-sitter-bash.wasm"),
-  powershell:
-    process.env.OPENCODE_TREE_SITTER_POWERSHELL_WASM_PATH ??
-    require.resolve("tree-sitter-powershell/tree-sitter-powershell.wasm"),
-}

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

@@ -9,14 +9,12 @@ export * as EditTool from "./edit"
 import type { Context as PluginContext } from "@opencode-ai/plugin/effect/plugin"
 import { ToolFailure } from "@opencode-ai/ai"
 import { FileDiff } from "@opencode-ai/schema/file-diff"
-import { Bom } from "@opencode-ai/util/bom"
+import { createTwoFilesPatch, diffLines } from "diff"
 import { Effect, Schema } from "effect"
 import { FileMutation } from "../../file-mutation"
-import { Formatter } from "../../formatter"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { LocationMutation } from "../../location-mutation"
 import { Permission } from "../../permission"
-import { fileDiff } from "./file-diff"
 
 export const name = "edit"
 
@@ -101,6 +99,7 @@ const findLineOccurrences = (content: string, search: string) => {
 }
 
 /** Deferred edit behavior and UX integrations remain visible at the model-facing seam. */
+// TODO: Add formatter integration after formatter runtime exists.
 // TODO: Publish watcher/file-edit events after watcher integration exists.
 // TODO: Add snapshots / undo after design exists.
 // TODO: Add LSP notification and diagnostics after LSP runtime exists.
@@ -110,7 +109,6 @@ export const Plugin = {
   effect: Effect.fn("EditTool.Plugin")(function* (ctx: PluginContext) {
     const mutation = yield* LocationMutation.Service
     const files = yield* FileMutation.Service
-    const formatter = yield* Formatter.Service
     const fs = yield* FSUtil.Service
     const permission = yield* Permission.Service
 
@@ -153,6 +151,14 @@ export const Plugin = {
                     })
                   }
 
+                  yield* permission.assert({
+                    action: "edit",
+                    resources: [target.resource],
+                    save: ["*"],
+                    sessionID: context.sessionID,
+                    agent: context.agent,
+                    source: permissionSource,
+                  })
                   const info = yield* fs.stat(target.canonical).pipe(
                     Effect.catchReason("PlatformError", "NotFound", () =>
                       Effect.fail(new ToolFailure({ message: `File not found: ${input.path}` })),
@@ -161,8 +167,9 @@ export const Plugin = {
                   if (info.type === "Directory") {
                     return yield* new ToolFailure({ message: `Path is a directory, not a file: ${input.path}` })
                   }
-                  const original = yield* Bom.readFile(fs, target.canonical)
-                  const source = original.text
+                  const bytes = yield* fs.readFile(target.canonical)
+                  const bom = bytes[0] === 0xef && bytes[1] === 0xbb && bytes[2] === 0xbf
+                  const source = new TextDecoder().decode(bom ? bytes.slice(3) : bytes)
                   const ending = source.includes(crlf) ? crlf : "\n"
                   const oldString = input.oldString.replaceAll(crlf, "\n").replaceAll("\n", ending)
                   const newString = input.newString.replaceAll(crlf, "\n").replaceAll("\n", ending)
@@ -176,26 +183,6 @@ export const Plugin = {
                       : findLineOccurrences(source, oldString)
                   const matches = exact.length > 0 ? exact : unicode.length > 0 ? unicode : trailing
                   const replacements = matches.length
-                  const replaced = (input.replaceAll === true ? matches : matches.slice(0, 1))
-                    .toReversed()
-                    .reduce(
-                      (content, match) =>
-                        `${content.slice(0, match.start)}${newString}${content.slice(match.end)}`,
-                      source,
-                    )
-                  const preview =
-                    replacements > 0 && (replacements === 1 || input.replaceAll === true)
-                      ? fileDiff(target.resource, source, replaced)
-                      : undefined
-                  yield* permission.assert({
-                    action: "edit",
-                    resources: [target.resource],
-                    save: ["*"],
-                    metadata: preview ? { files: [preview] } : undefined,
-                    sessionID: context.sessionID,
-                    agent: context.agent,
-                    source: permissionSource,
-                  })
                   if (replacements === 0) {
                     return yield* new ToolFailure({
                       message: `Could not find oldString in ${input.path}. It must match exactly, including whitespace and indentation.`,
@@ -206,17 +193,35 @@ export const Plugin = {
                       message: `Found ${replacements} matches for oldString, but expected exactly one. Add more surrounding context to make oldString unique, or set replaceAll to true to replace every occurrence.`,
                     })
                   }
+
+                  const replaced = (input.replaceAll === true ? matches : matches.slice(0, 1))
+                    .toReversed()
+                    .reduce(
+                      (content, match) =>
+                        `${content.slice(0, match.start)}${newString}${content.slice(match.end)}`,
+                      source,
+                    )
+                  const counts = diffLines(source, replaced).reduce(
+                    (result, item) => ({
+                      additions: result.additions + (item.added ? (item.count ?? 0) : 0),
+                      deletions: result.deletions + (item.removed ? (item.count ?? 0) : 0),
+                    }),
+                    { additions: 0, deletions: 0 },
+                  )
                   const replacementBom = replaced.startsWith("\uFEFF")
                   const result = yield* files.write({
                     target,
-                    content: Bom.join(replaced, original.bom || replacementBom),
+                    content: `${bom || replacementBom ? "\uFEFF" : ""}${replacementBom ? replaced.slice(1) : replaced}`,
                   })
-                  const bom = original.bom || replacementBom
-                  const formatted = (yield* formatter.file(target.canonical))
-                    ? yield* Bom.syncFile(fs, target.canonical, bom)
-                    : (yield* Bom.readFile(fs, target.canonical)).text
                   return {
-                    files: [fileDiff(result.resource, source, formatted)],
+                    files: [
+                      {
+                        file: result.resource,
+                        patch: createTwoFilesPatch(result.resource, result.resource, source, replaced),
+                        status: "modified" as const,
+                        ...counts,
+                      },
+                    ],
                     replacements,
                   } satisfies Output
                 }).pipe(

packages/core/src/tool/plugin/file-diff.ts

@@ -1,23 +0,0 @@
-import { FileDiff } from "@opencode-ai/schema/file-diff"
-import { createTwoFilesPatch, diffLines } from "diff"
-
-export function fileDiff(
-  file: string,
-  before: string,
-  after: string,
-  status: typeof FileDiff.Info.Type.status = "modified",
-): typeof FileDiff.Info.Type {
-  const counts = diffLines(before, after).reduce(
-    (result, item) => ({
-      additions: result.additions + (item.added ? (item.count ?? 0) : 0),
-      deletions: result.deletions + (item.removed ? (item.count ?? 0) : 0),
-    }),
-    { additions: 0, deletions: 0 },
-  )
-  return {
-    file,
-    patch: createTwoFilesPatch(file, file, before, after),
-    status,
-    ...counts,
-  }
-}

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

@@ -7,9 +7,7 @@ import { createTwoFilesPatch, diffLines } from "diff"
 import { Effect, Schema } from "effect"
 import { PlatformError } from "effect/PlatformError"
 import path from "path"
-import { Bom } from "@opencode-ai/util/bom"
 import { FSUtil } from "@opencode-ai/util/fs-util"
-import { Formatter } from "../../formatter"
 import { Location } from "../../location"
 import { Patch } from "@opencode-ai/util/patch"
 import { Permission } from "../../permission"
@@ -70,7 +68,6 @@ export const Plugin = {
   id: "opencode.tool.patch",
   effect: Effect.fn("PatchTool.Plugin")(function* (ctx: PluginContext) {
     const fs = yield* FSUtil.Service
-    const formatter = yield* Formatter.Service
     const location = yield* Location.Service
     const permission = yield* Permission.Service
 
@@ -132,16 +129,15 @@ export const Plugin = {
                           ...hunk,
                           target,
                           before: "",
-                          after: Bom.split(
-                            hunk.contents.endsWith("\n") || hunk.contents === ""
-                              ? hunk.contents
-                              : `${hunk.contents}\n`,
-                          ).text,
+                          after: (hunk.contents.endsWith("\n") || hunk.contents === ""
+                            ? hunk.contents
+                            : `${hunk.contents}\n`
+                          ).replace(/^\uFEFF/, ""),
                         })
                         return
                       }
                       if (hunk.type === "delete") {
-                        const content = yield* Bom.readFile(fs, target.canonical).pipe(
+                        const content = yield* fs.readFile(target.canonical).pipe(
                           Effect.mapError(
                             (error) =>
                               new ToolFailure({
@@ -149,7 +145,8 @@ export const Plugin = {
                               }),
                           ),
                         )
-                        prepared.push({ ...hunk, target, before: content.text, after: "" })
+                        const original = new TextDecoder("utf-8", { ignoreBOM: true }).decode(content)
+                        prepared.push({ ...hunk, target, before: original.replace(/^\uFEFF/, ""), after: "" })
                         return
                       }
                       const previous = updates.get(target.canonical)
@@ -169,17 +166,18 @@ export const Plugin = {
                               message: `patch verification failed: Failed to read file to update ${target.canonical}: path is a directory`,
                             })
                           }
-                          const content = yield* Bom.readFile(fs, target.canonical).pipe(
-                            Effect.mapError(
-                              (error) =>
-                                new ToolFailure({
-                                  message: `patch verification failed: Failed to read file to update ${target.canonical}: ${errorMessage(error)}`,
-                                }),
+                          return new TextDecoder("utf-8", { ignoreBOM: true }).decode(
+                            yield* fs.readFile(target.canonical).pipe(
+                              Effect.mapError(
+                                (error) =>
+                                  new ToolFailure({
+                                    message: `patch verification failed: Failed to read file to update ${target.canonical}: ${errorMessage(error)}`,
+                                  }),
+                              ),
                             ),
                           )
-                          return Bom.join(content.text, content.bom)
                         }))
-                      const before = Bom.split(original).text
+                      const before = original.replace(/^\uFEFF/, "")
                       const update = yield* Effect.try({
                         try: () => Patch.derive(hunk.path, hunk.chunks, original),
                         catch: (error) =>
@@ -219,7 +217,7 @@ export const Plugin = {
                     )
                   }
 
-                  const patchFiles = prepared.map((change) => patchFile(change))
+                  const patchFiles = prepared.map(patchFile)
                   yield* permission.assert({
                     action: "edit",
                     resources: [...new Set(targets.map((target) => target.resource))],
@@ -297,31 +295,7 @@ export const Plugin = {
                       }),
                     { discard: true },
                   )
-                  const formatted = new Map<string, string>()
-                  yield* Effect.forEach(
-                    [...new Set(applied.filter((item) => item.type !== "delete").map((item) => item.target))],
-                    (target) =>
-                      Effect.gen(function* () {
-                        const current = yield* Bom.readFile(fs, target).pipe(
-                          Effect.mapError((error) => fail(`Failed to read ${target}`, error)),
-                        )
-                        formatted.set(
-                          target,
-                          (yield* formatter.file(target))
-                            ? yield* Bom.syncFile(fs, target, current.bom).pipe(
-                                Effect.mapError((error) => fail(`Failed to sync ${target}`, error)),
-                              )
-                            : current.text,
-                        )
-                      }),
-                    { discard: true },
-                  )
-                  const files = yield* Effect.forEach(prepared, (change) => {
-                    if (change.type === "delete") return Effect.succeed(patchFile(change))
-                    const target = change.type === "update" && change.moveTarget ? change.moveTarget : change.target
-                    return Effect.succeed(patchFile(change, formatted.get(target.canonical)))
-                  })
-                  return { applied, files }
+                  return { applied, files: patchFiles }
                 }).pipe(
                   Effect.map((output) => ({
                     output,
@@ -363,15 +337,15 @@ function errorMessage(error: unknown) {
   return error instanceof Error ? error.message : String(error)
 }
 
-function patchFile(change: Prepared, after = change.after): typeof FileDiff.Info.Type {
+function patchFile(change: Prepared): typeof FileDiff.Info.Type {
   const target = (change.type === "update" ? change.moveTarget : undefined)?.resource ?? change.target.resource
   const patch = trimDiff(
-    createTwoFilesPatch(change.target.canonical, change.target.canonical, change.before, after),
+    createTwoFilesPatch(change.target.canonical, change.target.canonical, change.before, change.after),
   )
   const counts =
     change.type === "delete"
       ? { additions: 0, deletions: change.before.split("\n").length }
-      : diffLines(change.before, after).reduce(
+      : diffLines(change.before, change.after).reduce(
           (result, item) => ({
             additions: result.additions + (item.added ? (item.count ?? 0) : 0),
             deletions: result.deletions + (item.removed ? (item.count ?? 0) : 0),

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

@@ -1,6 +1,5 @@
 export * as ShellTool from "./shell"
 
-import path from "path"
 import { ToolFailure } from "@opencode-ai/ai"
 import type { Content } from "@opencode-ai/schema/tool"
 import type { Context as PluginContext } from "@opencode-ai/plugin/effect/plugin"
@@ -12,7 +11,6 @@ import { PluginRuntime } from "../../plugin/runtime"
 import { NonNegativeInt } from "../../schema"
 import { SessionSchema } from "../../session/schema"
 import { Shell } from "../../shell"
-import { ShellParse } from "../../shell/parse"
 
 export const name = "shell"
 export const DEFAULT_TIMEOUT_MS = 2 * 60 * 1_000
@@ -77,6 +75,18 @@ const modelOutput = (output: Output): string | undefined => {
   return `Command exited with code ${output.exit}.`
 }
 
+/**
+ * Minimal core shell boundary. Keep parity debt visible without pulling the
+ * legacy shell runtime into core.
+ */
+// TODO: Port tree-sitter bash / PowerShell parser-based approval reduction.
+// TODO: Port BashArity reusable command-prefix approvals.
+// TODO: Add plugin shell.env environment augmentation once plugin hooks exist.
+// TODO: Persist job status and define restart recovery before exposing remote observation.
+// TODO: Add HTTP job observation only after durable status, restart recovery, and authorization are defined.
+// TODO: Revisit process-group cleanup and platform coverage with shell-specific tests if current AppProcess semantics do not fully cover it.
+// TODO: Revisit binary output handling if stdout/stderr decoding is text-only.
+
 export const Plugin = {
   id: "opencode.tool.shell",
   effect: Effect.fn("ShellTool.Plugin")(function* (ctx: PluginContext) {
@@ -148,34 +158,24 @@ export const Plugin = {
                   (invocation) =>
                     Effect.gen(function* () {
                       const target = yield* mutation.resolve({ path: invocation.cwd, kind: "directory" })
-                      const parsed = yield* ShellParse.scan(invocation.command, invocation.shell, target.canonical)
-                      const directories = yield* Effect.forEach(parsed.directories, (directory) =>
-                        mutation.resolve({ path: path.resolve(target.canonical, directory), kind: "directory" }),
-                      )
                       invocation.cwd = target.canonical
                       finalTimeout = invocation.timeout
-                      const external = [target, ...directories]
-                        .map((item) => item.externalDirectory)
-                        .filter((item) => item !== undefined)
-                        .filter((item, index, items) => items.findIndex((other) => other.resource === item.resource) === index)
-                      if (external.length > 0)
+                      const external = target.externalDirectory
+                      if (external)
                         yield* permission.assert({
-                          action: "external_directory",
-                          resources: external.map((item) => item.resource),
-                          save: external.map((item) => item.save),
-                          sessionID: context.sessionID,
-                          agent: context.agent,
-                          source,
-                        })
-                      if (parsed.commands.length > 0)
-                        yield* permission.assert({
-                          action: name,
-                          resources: parsed.commands.map((command) => command.resource),
-                          save: parsed.commands.map((command) => command.save),
+                          ...LocationMutation.externalDirectoryPermission(external),
                           sessionID: context.sessionID,
                           agent: context.agent,
                           source,
                         })
+                      yield* permission.assert({
+                        action: name,
+                        resources: [invocation.command],
+                        save: [invocation.command],
+                        sessionID: context.sessionID,
+                        agent: context.agent,
+                        source,
+                      })
                       if ((yield* fsUtil.stat(target.canonical)).type !== "Directory")
                         return yield* Effect.fail(new Error(`Working directory is not a directory: ${target.canonical}`))
                     }),
@@ -198,20 +198,20 @@ export const Plugin = {
 
                 const settleShell = Effect.fn("ShellTool.settleShell")(function* () {
                   const final = yield* shell.wait(info.id)
-                  const capture = yield* captureShell()
 
                   // `exit` is optionalKey in the Output schema; a present-but-undefined key
                   // fails output encoding, so omit it when the process has no exit code.
                   if (final.status === "timeout") {
                     return {
                       ...(final.exit !== undefined ? { exit: final.exit } : {}),
-                      output: `${capture.output}\n\nCommand exceeded timeout of ${finalTimeout} ms. Retry with a larger timeout if the command is expected to take longer.`,
-                      truncated: capture.truncated,
+                      output: `Command exceeded timeout of ${finalTimeout} ms. Retry with a larger timeout if the command is expected to take longer.`,
+                      truncated: false,
                       timeout: true,
                       status: "completed" as const,
                     }
                   }
 
+                  const capture = yield* captureShell()
                   return {
                     ...(final.exit !== undefined ? { exit: final.exit } : {}),
                     output: capture.output,
@@ -224,7 +224,7 @@ export const Plugin = {
                 const run = settleShell().pipe(
                   Effect.tap((output) => Deferred.succeed(settled, output)),
                   Effect.map((output) => output.output),
-                  Effect.onInterrupt(() => shell.remove(info.id).pipe(Effect.ignore)),
+                  Effect.onInterrupt(() => shell.kill(info.id).pipe(Effect.ignore)),
                 )
                 const job = yield* runtime.job.start({
                   id: context.callID,

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

@@ -13,19 +13,15 @@ export const name = "subagent"
 
 const NO_TEXT = "Subagent completed without a text response."
 const backgroundStarted = (sessionID: SessionSchema.ID) =>
-  [
-    `The subagent is working in the background (id: ${sessionID}). You will be notified automatically when it finishes.`,
-    "DO NOT sleep, poll for progress, ask the subagent for status, or duplicate this subagent's work; avoid working with the same files or topics it is using.",
-    "Work on non-overlapping tasks, or briefly tell the user what you launched and end your response.",
-  ].join("\n")
+  `The subagent is working in the background (id: ${sessionID}). You will be notified automatically when it finishes. DO NOT sleep, poll, or proactively check on its progress.`
 
 export const Input = Schema.Struct({
-  agent: Schema.String.annotate({ description: "The type of specialized agent to use for this task" }),
-  description: Schema.String.annotate({ description: "A short 3-5 word label for the task, displayed to the user" }),
+  agent: Schema.String.annotate({ description: "The configured agent to run as the subagent" }),
+  description: Schema.String.annotate({ description: "A short description of the subagent's task" }),
   prompt: Schema.String.annotate({ description: "The task for the subagent to perform" }),
   background: Schema.optionalKey(Schema.Boolean).annotate({
     description:
-      "Run the subagent in the background and return immediately. You will be notified when it completes. DO NOT sleep, poll, or proactively check on its progress.",
+      "Run the subagent in the background and return immediately. You will be notified when it completes. DO NOT poll its progress.",
   }),
 })
 
@@ -35,8 +31,7 @@ export const Output = Schema.Struct({
   output: Schema.String,
 })
 export const description = [
-  "Spawns an agent in a child session to work on the specified task.",
-  "Include all relevant context and instructions in the prompt because the child starts with fresh context.",
+  "Spawn a subagent: a child session running a configured agent with fresh context.",
   "Foreground (default) runs the subagent to completion and returns its final response.",
   "Background mode (background=true) launches it asynchronously and returns immediately; you are notified when it finishes.",
   "Use background only for independent work that can run while you continue elsewhere.",

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

@@ -9,20 +9,17 @@ export * as WriteTool from "./write"
 import type { Context as PluginContext } from "@opencode-ai/plugin/effect/plugin"
 import { ToolFailure } from "@opencode-ai/ai"
 import { Effect, Schema } from "effect"
-import { Bom } from "@opencode-ai/util/bom"
-import { FSUtil } from "@opencode-ai/util/fs-util"
 import { FileMutation } from "../../file-mutation"
-import { Formatter } from "../../formatter"
 import { LocationMutation } from "../../location-mutation"
 import { Permission } from "../../permission"
-import { fileDiff } from "./file-diff"
 
 export const name = "write"
 
 // TODO: Revisit whether model-facing mutation schemas should prefer absolute `filePath` naming for trained-in compatibility after evaluating model behavior.
 export const Input = Schema.Struct({
   path: Schema.String.annotate({
-    description: "Path to the file to write to",
+    description:
+      "File path to write. Relative paths resolve within the active Location. Absolute paths inside that Location are accepted; external absolute paths require external_directory approval.",
   }),
   content: Schema.String.annotate({ description: "Content to write to the file" }),
 })
@@ -39,6 +36,7 @@ export const toModelOutput = (output: Output) =>
   `${output.existed ? "Wrote" : "Created"} file successfully: ${output.resource}`
 
 /** Deferred write UX integrations remain visible at the model-facing seam. */
+// TODO: Add formatter integration after formatter runtime exists.
 // TODO: Publish watcher/file-edit events after watcher integration exists.
 // TODO: Add snapshots / undo after design exists.
 // TODO: Add LSP notification and diagnostics after LSP runtime exists.
@@ -48,8 +46,6 @@ export const Plugin = {
   effect: Effect.fn("WriteTool.Plugin")(function* (ctx: PluginContext) {
     const mutation = yield* LocationMutation.Service
     const files = yield* FileMutation.Service
-    const formatter = yield* Formatter.Service
-    const fs = yield* FSUtil.Service
     const permission = yield* Permission.Service
 
     yield* ctx.tool
@@ -59,7 +55,7 @@ export const Plugin = {
               name,
               options: { codemode: false, permission: "edit" },
               description:
-                "Writes a file to the local filesystem, overwriting if one exists.\n\nMissing parent directories are created automatically.\n\nUse this tool to create new files or overwrite existing files. For partial changes, use the edit tool instead.",
+                "Write content to one file. Relative paths resolve within the active Location. Absolute paths inside the Location are accepted. Explicit external absolute paths require external_directory approval before edit approval.",
               input: Input,
               output: Output,
               execute: (input, context) =>
@@ -78,29 +74,15 @@ export const Plugin = {
                       agent: context.agent,
                       source,
                     })
-                  const current = yield* Bom.readFile(fs, target.canonical).pipe(
-                    Effect.catchReason("PlatformError", "NotFound", () => Effect.succeed(undefined)),
-                  )
-                  const next = Bom.split(input.content)
-                  const preview = fileDiff(
-                    target.resource,
-                    current?.text ?? "",
-                    next.text,
-                    current ? "modified" : "added",
-                  )
                   yield* permission.assert({
                     action: "edit",
                     resources: [target.resource],
                     save: ["*"],
-                    metadata: { files: [preview] },
                     sessionID: context.sessionID,
                     agent: context.agent,
                     source,
                   })
-                  const result = yield* files.writeTextPreservingBom({ target, content: input.content })
-                  const bom = (yield* Bom.readFile(fs, target.canonical)).bom
-                  if (yield* formatter.file(target.canonical)) yield* Bom.syncFile(fs, target.canonical, bom)
-                  return result
+                  return yield* files.writeTextPreservingBom({ target, content: input.content })
                 }).pipe(
                   Effect.map((output) => ({ output, content: toModelOutput(output) })),
                   Effect.mapError((error) => new ToolFailure({ message: `Unable to write ${input.path}`, error })),

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

@@ -26,7 +26,6 @@ import timeSuspendedMigration from "@opencode-ai/core/database/migration/2026070
 import instructionSyncMigration from "@opencode-ai/core/database/migration/20260710025429_instruction_sync"
 import deleteToolProgressEventsMigration from "@opencode-ai/core/database/migration/20260722011141_delete_tool_progress_events"
 import canonicalToolResultsMigration from "@opencode-ai/core/database/migration/20260722170000_canonical_tool_results"
-import optionalSessionTitleMigration from "@opencode-ai/core/database/migration/20260730195856_optional_session_title"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { Bus } from "@opencode-ai/core/bus"
@@ -400,40 +399,6 @@ describe("DatabaseMigration", () => {
     ).rejects.toThrow("Database is not empty and has no session table")
   })
 
-  test("makes session titles nullable without deleting dependent rows", async () => {
-    await run(
-      Effect.gen(function* () {
-        const db = yield* makeDb
-        yield* db.run(sql`PRAGMA foreign_keys = ON`)
-        yield* db.run(sql`
-          CREATE TABLE session (
-            id text PRIMARY KEY,
-            title text NOT NULL
-          )
-        `)
-        yield* db.run(sql`
-          CREATE TABLE message (
-            id text PRIMARY KEY,
-            session_id text NOT NULL REFERENCES session(id) ON DELETE CASCADE
-          )
-        `)
-        yield* db.run(sql`INSERT INTO session VALUES ('ses_existing', 'Existing title')`)
-        yield* db.run(sql`INSERT INTO message VALUES ('msg_existing', 'ses_existing')`)
-
-        yield* DatabaseMigration.applyOnly(db, [optionalSessionTitleMigration])
-
-        expect(yield* db.get(sql`SELECT title FROM session WHERE id = 'ses_existing'`)).toEqual({
-          title: "Existing title",
-        })
-        expect(yield* db.get(sql`SELECT id FROM message WHERE id = 'msg_existing'`)).toEqual({ id: "msg_existing" })
-        expect(
-          yield* db.get<{ notnull: number }>(sql`SELECT "notnull" FROM pragma_table_info('session') WHERE name = 'title'`),
-        ).toEqual({ notnull: 0 })
-        expect(yield* db.get<{ foreign_keys: number }>(sql`PRAGMA foreign_keys`)).toEqual({ foreign_keys: 1 })
-      }),
-    )
-  })
-
   test("backfills existing Context Epoch rows to the build agent", async () => {
     await run(
       Effect.gen(function* () {

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

@@ -56,7 +56,7 @@ describe("node build", () => {
               Location.Service.of({
                 directory: ref.directory,
                 workspaceID: ref.workspaceID,
-                project: { id: Project.ID.global, directory: service.directory, canonical: service.directory },
+                project: { id: Project.ID.global, directory: service.directory },
               }),
             ),
           { idleTimeToLive: "1 minute" },
@@ -79,7 +79,7 @@ describe("node build", () => {
         return Project.Service.of({
           list: () => Effect.succeed([]),
           directories: () => Effect.succeed([]),
-          resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+          resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
           commit: () => Effect.void,
         })
       }),

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

@@ -1,5 +1,5 @@
 import { describe, test, expect } from "bun:test"
-import { Effect, FileSystem, Layer } from "effect"
+import { Effect, FileSystem } from "effect"
 import { LayerNodePlatform } from "@opencode-ai/util/effect/app-node-platform"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { FSUtil } from "@opencode-ai/util/fs-util"
@@ -267,33 +267,6 @@ describe("FSUtil", () => {
         expect(result).toContain(path.join(tmp, "b.txt"))
       }),
     )
-
-    it(
-      "stops at the first match when requested",
-      Effect.gen(function* () {
-        const filesys = yield* FileSystem.FileSystem
-        const tmp = yield* filesys.makeTempDirectoryScoped()
-        yield* filesys.writeFileString(path.join(tmp, "marker"), "root")
-        const child = path.join(tmp, "sub")
-        yield* filesys.makeDirectory(child)
-        yield* filesys.writeFileString(path.join(child, "marker"), "child")
-        const checked: string[] = []
-        const instrumented = FileSystem.FileSystem.of({
-          ...filesys,
-          exists: (target) => Effect.sync(() => checked.push(target)).pipe(Effect.andThen(filesys.exists(target))),
-        })
-        const search = yield* FSUtil.Service.pipe(
-          Effect.provide(
-            FSUtil.layer.pipe(Layer.fresh, Layer.provide(Layer.succeed(FileSystem.FileSystem, instrumented))),
-          ),
-        )
-
-        expect(yield* search.up({ targets: ["marker", "other"], start: child, mode: "first" })).toEqual([
-          path.join(child, "marker"),
-        ])
-        expect(checked).toEqual([path.join(child, "marker")])
-      }),
-    )
   })
 
   describe("glob", () => {

packages/core/test/fixture/location.ts

@@ -5,11 +5,10 @@ import { Effect, Layer } from "effect"
 import { tmpdir } from "./tmpdir"
 
 export function location(ref: Location.Ref, input: { projectDirectory?: AbsolutePath; vcs?: Project.Vcs } = {}) {
-  const directory = input.projectDirectory ?? ref.directory
   return {
     directory: ref.directory,
     workspaceID: ref.workspaceID,
-    project: { id: Project.ID.global, directory, canonical: directory },
+    project: { id: Project.ID.global, directory: input.projectDirectory ?? ref.directory },
     vcs: input.vcs,
   } satisfies Location.Interface
 }

packages/core/test/formatter.test.ts

@@ -1,199 +0,0 @@
-import fs from "fs/promises"
-import path from "path"
-import { describe, expect } from "bun:test"
-import { Effect, Layer, Schema, Stream } from "effect"
-import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
-import { AbsolutePath } from "@opencode-ai/core/schema"
-import { Npm } from "@opencode-ai/util/npm"
-import { Config } from "../src/config"
-import { Formatter } from "../src/formatter"
-import { Location } from "../src/location"
-import { location } from "./fixture/location"
-import { tmpdir } from "./fixture/tmpdir"
-import { testEffect } from "./lib/effect"
-
-const it = testEffect(Layer.empty)
-type ConfigInput = typeof Config.Info.Encoded
-
-function formatterLayer(directory: string, configured?: ConfigInput["formatter"]) {
-  const entries =
-    configured === undefined
-      ? []
-      : [
-          new Config.Document({
-            type: "document",
-            info: Schema.decodeUnknownSync(Config.Info)({ formatter: configured }),
-          }),
-        ]
-  return AppNodeBuilder.build(Formatter.node, [
-    [
-      Config.node,
-      Layer.succeed(
-        Config.Service,
-        Config.Service.of({
-          entries: () => Effect.succeed(entries),
-          changes: () => Stream.empty,
-        }),
-      ),
-    ],
-    [
-      Location.node,
-      Layer.succeed(
-        Location.Service,
-        Location.Service.of(location({ directory: AbsolutePath.make(directory) })),
-      ),
-    ],
-    [Npm.node, Layer.mock(Npm.Service, { which: () => Effect.succeed(undefined) })],
-  ])
-}
-
-function withTemp<A, E, R>(body: (directory: string) => Effect.Effect<A, E, R>) {
-  return Effect.acquireUseRelease(
-    Effect.promise(() => tmpdir()),
-    (tmp) => body(tmp.path),
-    (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-  )
-}
-
-describe("Formatter", () => {
-  it.live("status() returns empty list when no formatters are configured", () =>
-    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))),
-    ),
-  )
-
-  it.live("file() returns false when no formatter runs", () =>
-    withTemp((directory) =>
-      Effect.gen(function* () {
-        const file = path.join(directory, "test.txt")
-        yield* Effect.promise(() => fs.writeFile(file, "x"))
-        expect(yield* Formatter.Service.use((formatter) => formatter.file(file))).toBe(false)
-      }).pipe(Effect.provide(formatterLayer(directory, false))),
-    ),
-  )
-
-  it.live("status() initializes formatter state per directory", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => Promise.all([tmpdir(), tmpdir()])),
-      ([off, on]) =>
-        Effect.gen(function* () {
-          const disabled = yield* Formatter.Service.use((formatter) => formatter.status()).pipe(
-            Effect.provide(formatterLayer(off.path, false)),
-          )
-          const enabled = yield* Formatter.Service.use((formatter) => formatter.status()).pipe(
-            Effect.provide(formatterLayer(on.path, true)),
-          )
-          expect(disabled).toEqual([])
-          expect(enabled.find((item) => item.name === "gofmt")).toBeDefined()
-        }),
-      (directories) =>
-        Effect.promise(() => Promise.all(directories.map((tmp) => tmp[Symbol.asyncDispose]())).then(() => undefined)),
-    ),
-  )
-
-  it.live("stops after the first matching formatter succeeds", () =>
-    withTemp((directory) =>
-      Effect.gen(function* () {
-        const file = path.join(directory, "test.seq")
-        yield* Effect.promise(() => fs.writeFile(file, "x"))
-        expect(yield* Formatter.Service.use((formatter) => formatter.file(file))).toBe(true)
-        expect(yield* Effect.promise(() => fs.readFile(file, "utf8"))).toBe("xA")
-      }).pipe(
-        Effect.provide(
-          formatterLayer(directory, {
-            first: {
-              command: [
-                process.execPath,
-                "-e",
-                "const fs = require('fs'); const file = process.argv.at(-1); fs.appendFileSync(file, 'A')",
-                "$FILE",
-              ],
-              extensions: [".seq"],
-            },
-            second: {
-              command: [
-                process.execPath,
-                "-e",
-                "const fs = require('fs'); const file = process.argv.at(-1); fs.appendFileSync(file, 'B')",
-                "$FILE",
-              ],
-              extensions: [".seq"],
-            },
-          }),
-        ),
-      ),
-    ),
-  )
-
-  it.live("tries the next matching formatter when the first fails", () =>
-    withTemp((directory) =>
-      Effect.gen(function* () {
-        const file = path.join(directory, "test.fallback")
-        yield* Effect.promise(() => fs.writeFile(file, "x"))
-        expect(yield* Formatter.Service.use((formatter) => formatter.file(file))).toBe(true)
-        expect(yield* Effect.promise(() => fs.readFile(file, "utf8"))).toBe("xB")
-      }).pipe(
-        Effect.provide(
-          formatterLayer(directory, {
-            first: {
-              command: [process.execPath, "-e", "process.exit(1)", "$FILE"],
-              extensions: [".fallback"],
-            },
-            second: {
-              command: [
-                process.execPath,
-                "-e",
-                "const fs = require('fs'); const file = process.argv.at(-1); fs.appendFileSync(file, 'B')",
-                "$FILE",
-              ],
-              extensions: [".fallback"],
-            },
-          }),
-        ),
-      ),
-    ),
-  )
-})

packages/core/test/generate.test.ts

@@ -15,7 +15,7 @@ import { testEffect } from "./lib/effect"
 
 const selected = Info.make({
   ...Info.default(Provider.ID.make("test-provider"), ID.make("gemini")),
-  package: Provider.aisdk("@ai-sdk/mistral"),
+  package: Provider.aisdk("@ai-sdk/google"),
 })
 const runtime = Model.make({ id: "gemini", provider: "test-provider", route: OpenAIChat.route })
 

packages/core/test/location.test.ts

@@ -18,7 +18,6 @@ const projectLayer = Layer.succeed(
       Effect.succeed({
         id: Project.ID.make("project"),
         directory: AbsolutePath.make("/repo"),
-        canonical: AbsolutePath.make("/main/repo"),
         vcs: { type: "git", store: AbsolutePath.make("/repo/.git") },
       }),
     commit: () => Effect.void,
@@ -35,7 +34,6 @@ describe("Location", () => {
       expect(location.workspaceID).toBe(workspaceID)
       expect(location.project.id).toBe(Project.ID.make("project"))
       expect(location.project.directory).toBe(AbsolutePath.make("/repo"))
-      expect(location.project.canonical).toBe(AbsolutePath.make("/main/repo"))
       expect(location.vcs).toEqual({
         type: "git",
         store: AbsolutePath.make("/repo/.git"),

packages/core/test/mcp.test.ts

@@ -1,7 +1,6 @@
 import path from "node:path"
 import { describe, expect, test } from "bun:test"
 import { Client } from "@modelcontextprotocol/sdk/client/index.js"
-import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js"
 import { InMemoryTransport } from "@modelcontextprotocol/sdk/inMemory.js"
 import { Server } from "@modelcontextprotocol/sdk/server/index.js"
 import { WebStandardStreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/webStandardStreamableHttp.js"
@@ -560,42 +559,6 @@ test("lists, reads, and reports MCP resource changes", async () => {
   )
 })
 
-test("does not reconnect an SSE stream after a JSON-RPC error response", async () => {
-  let requests = 0
-  const transport = new StreamableHTTPClientTransport(new URL("http://mcp.invalid"), {
-    fetch: async () => {
-      requests += 1
-      return new Response(
-        new ReadableStream({
-          start(controller) {
-            controller.enqueue(new TextEncoder().encode("id: prime\nretry: 1\ndata:\n\n"))
-            controller.enqueue(
-              new TextEncoder().encode(
-                'id: error\ndata: {"jsonrpc":"2.0","error":{"code":-32601,"message":"Method not found"},"id":1}\n\n',
-              ),
-            )
-            controller.close()
-          },
-        }),
-        { status: 200, headers: { "content-type": "text/event-stream" } },
-      )
-    },
-    reconnectionOptions: {
-      initialReconnectionDelay: 1,
-      maxReconnectionDelay: 1,
-      reconnectionDelayGrowFactor: 1,
-      maxRetries: 2,
-    },
-  })
-
-  await transport.start()
-  await transport.send({ jsonrpc: "2.0", method: "resources/list", id: 1 })
-  await Bun.sleep(25)
-  await transport.close()
-
-  expect(requests).toBe(1)
-})
-
 test("skips MCP resource requests when the capability is absent", async () => {
   await Effect.runPromise(
     Effect.scoped(

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

@@ -546,76 +546,6 @@ describe("ModelResolver", () => {
     }),
   )
 
-  it.effect("routes supported AISDK catalog packages through native provider packages", () =>
-    Effect.gen(function* () {
-      const native = yield* ModelResolver.fromCatalogModel(model(Provider.aisdk("@ai-sdk/openai")))
-      const packages = [
-        ["@ai-sdk/google", "@opencode-ai/ai/providers/google", "gemini"],
-        ["@openrouter/ai-sdk-provider", "@opencode-ai/ai/providers/openrouter", "openrouter"],
-        ["@ai-sdk/xai", "@opencode-ai/ai/providers/xai", "xai"],
-      ] as const
-
-      yield* Effect.forEach(packages, ([catalogPackage, nativePackage, optionKey]) =>
-        ModelResolver.fromCatalogModel(
-          model(Provider.aisdk(catalogPackage), {
-            modelID: "api-model",
-            settings: { baseURL: "https://provider.example/v1", reasoningEffort: "high" },
-            headers: { "x-provider": "header" },
-            body: { custom: true },
-          }),
-          Credential.Key.make({ type: "key", key: "secret" }),
-          {
-            loadPackage: (specifier) => {
-              expect(specifier).toBe(nativePackage)
-              return Effect.succeed({
-                model: (modelID, settings) => {
-                  expect(modelID).toBe("api-model")
-                  expect(settings).toMatchObject({
-                    apiKey: "secret",
-                    baseURL: "https://provider.example/v1",
-                    headers: { "x-provider": "header" },
-                    body: { custom: true },
-                    limits: { context: 100, output: 20 },
-                    providerOptions: { [optionKey]: { reasoningEffort: "high" } },
-                  })
-                  return Model.make({ id: modelID, provider: "native-provider", route: native.route })
-                },
-              })
-            },
-            loadAISDK: () => Effect.die("AI SDK loader should not be called"),
-          },
-        ),
-      )
-    }),
-  )
-
-  it.effect("loads supported AISDK catalog packages as native routes", () =>
-    Effect.gen(function* () {
-      const google = yield* ModelResolver.fromCatalogModel(
-        model(Provider.aisdk("@ai-sdk/google"), { settings: { thinkingConfig: { thinkingBudget: 1_024 } } }),
-      )
-      const openrouter = yield* ModelResolver.fromCatalogModel(
-        model(Provider.aisdk("@openrouter/ai-sdk-provider"), {
-          settings: { reasoning: { effort: "high" } },
-        }),
-      )
-      const xai = yield* ModelResolver.fromCatalogModel(
-        model(Provider.aisdk("@ai-sdk/xai"), { settings: { reasoningEffort: "high" } }),
-      )
-
-      expect(google.route.id).toBe("gemini")
-      expect(google.route.defaults.providerOptions).toEqual({
-        gemini: { thinkingConfig: { thinkingBudget: 1_024 } },
-      })
-      expect(openrouter.route.id).toBe("openrouter")
-      expect(openrouter.route.defaults.providerOptions).toEqual({ openrouter: { reasoning: { effort: "high" } } })
-      expect(xai.route.id).toBe("openai-responses")
-      expect(xai.route.defaults.providerOptions).toEqual({
-        xai: { reasoningEffort: "high", store: false },
-      })
-    }),
-  )
-
   it.effect("loads arbitrary AISDK packages through the injected AISDK loader", () =>
     Effect.gen(function* () {
       const native = yield* ModelResolver.fromCatalogModel(
@@ -624,8 +554,8 @@ describe("ModelResolver", () => {
         }),
       )
       const resolved = yield* ModelResolver.fromCatalogModel(
-        model(Provider.aisdk("@ai-sdk/mistral"), {
-          modelID: "mistral-api-model",
+        model(Provider.aisdk("@ai-sdk/google"), {
+          modelID: "gemini-api-model",
           settings: { project: "test" },
           headers: { "x-aisdk": "header" },
           body: { custom: true },
@@ -636,9 +566,9 @@ describe("ModelResolver", () => {
             Effect.sync(() => {
               expect(runtime).toMatchObject({
                 id: "test-model",
-                modelID: "mistral-api-model",
+                modelID: "gemini-api-model",
                 providerID: "test-provider",
-                package: Provider.aisdk("@ai-sdk/mistral"),
+                package: Provider.aisdk("@ai-sdk/google"),
                 settings: { project: "test", apiKey: "fallback-secret" },
                 headers: { "x-aisdk": "header" },
                 body: { custom: true },
@@ -652,15 +582,15 @@ describe("ModelResolver", () => {
         },
       )
 
-      expect(resolved).toMatchObject({ id: "mistral-api-model", provider: "test-provider" })
+      expect(resolved).toMatchObject({ id: "gemini-api-model", provider: "test-provider" })
     }),
   )
 
   it.effect("rejects AISDK packages without an available loader", () =>
     Effect.gen(function* () {
       const failure = yield* ModelResolver.fromCatalogModel(
-        model(Provider.aisdk("@ai-sdk/mistral"), {
-          settings: { baseURL: "https://mistral.example/v1" },
+        model(Provider.aisdk("@ai-sdk/google"), {
+          settings: { baseURL: "https://google.example/v1" },
         }),
       ).pipe(Effect.flip)
 
@@ -668,9 +598,9 @@ describe("ModelResolver", () => {
         _tag: "SessionRunnerModel.UnsupportedPackageError",
         providerID: "test-provider",
         modelID: "test-model",
-        package: "aisdk:@ai-sdk/mistral",
+        package: "aisdk:@ai-sdk/google",
       })
-      expect(failure.message).toBe("Unsupported package for test-provider/test-model: aisdk:@ai-sdk/mistral")
+      expect(failure.message).toBe("Unsupported package for test-provider/test-model: aisdk:@ai-sdk/google")
     }),
   )
 
@@ -682,8 +612,8 @@ describe("ModelResolver", () => {
         }),
       )
       yield* ModelResolver.fromCatalogModel(
-        model(Provider.aisdk("@ai-sdk/mistral"), {
-          settings: { apiKey: "", baseURL: "https://mistral.example/v1" },
+        model(Provider.aisdk("@ai-sdk/google"), {
+          settings: { apiKey: "", baseURL: "https://google.example/v1" },
         }),
         undefined,
         {

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

@@ -11,6 +11,7 @@ import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { Bus } from "@opencode-ai/core/bus"
 import { Job } from "@opencode-ai/core/job"
 import { Project } from "@opencode-ai/core/project"
+import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { ProjectDirectories } from "@opencode-ai/core/project/directories"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Session } from "@opencode-ai/core/session"
@@ -87,6 +88,11 @@ describe("MoveSession", () => {
       const projectID = (yield* Project.Service.use((service) => service.resolve(source))).id
       const sessionID = Session.ID.make("ses_move")
       const { db } = yield* Database.Service
+      yield* db
+        .insert(ProjectTable)
+        .values({ id: projectID, worktree: source, sandboxes: [], time_created: 1, time_updated: 1 })
+        .run()
+        .pipe(Effect.orDie)
       yield* db
         .insert(SessionTable)
         .values({
@@ -138,6 +144,11 @@ describe("MoveSession", () => {
       const projectID = (yield* Project.Service.use((service) => service.resolve(source))).id
       const sessionID = Session.ID.make("ses_move_nested")
       const { db } = yield* Database.Service
+      yield* db
+        .insert(ProjectTable)
+        .values({ id: projectID, worktree: source, sandboxes: [], time_created: 1, time_updated: 1 })
+        .run()
+        .pipe(Effect.orDie)
       yield* db
         .insert(SessionTable)
         .values({
@@ -193,6 +204,11 @@ describe("MoveSession", () => {
       const destinationProjectID = (yield* Project.Service.use((service) => service.resolve(destination))).id
       const sessionID = Session.ID.make("ses_move_project")
       const { db } = yield* Database.Service
+      yield* db
+        .insert(ProjectTable)
+        .values({ id: projectID, worktree: source, sandboxes: [], time_created: 1, time_updated: 1 })
+        .run()
+        .pipe(Effect.orDie)
       yield* db
         .insert(SessionTable)
         .values({
@@ -252,6 +268,11 @@ describe("MoveSession", () => {
       const projectID = (yield* Project.Service.use((service) => service.resolve(source))).id
       const sessionID = Session.ID.make("ses_move_nested_checkout")
       const { db } = yield* Database.Service
+      yield* db
+        .insert(ProjectTable)
+        .values({ id: projectID, worktree: source, sandboxes: [], time_created: 1, time_updated: 1 })
+        .run()
+        .pipe(Effect.orDie)
       yield* db
         .insert(SessionTable)
         .values({

packages/core/test/plugin/host.ts

@@ -121,11 +121,7 @@ export function agentHost(agent: Agent.Interface): Plugin.Context["agent"] {
             ? Effect.succeed({
                 location: new Location.Info({
                   directory: AbsolutePath.make("/"),
-                  project: {
-                    id: Project.ID.make("test"),
-                    directory: AbsolutePath.make("/"),
-                    canonical: AbsolutePath.make("/"),
-                  },
+                  project: { id: Project.ID.make("test"), directory: AbsolutePath.make("/") },
                 }),
                 data: agentInfo(value),
               })
@@ -167,11 +163,7 @@ export function catalogHost(catalog: Catalog.Interface): Plugin.Context["catalog
           Effect.map((data) => ({
             location: new Location.Info({
               directory: AbsolutePath.make("/"),
-              project: {
-                id: Project.ID.make("test"),
-                directory: AbsolutePath.make("/"),
-                canonical: AbsolutePath.make("/"),
-              },
+              project: { id: Project.ID.make("test"), directory: AbsolutePath.make("/") },
             }),
             data: data.map(modelInfo),
           })),
@@ -365,11 +357,7 @@ export function integrationHost(integration: Integration.Interface): Plugin.Cont
 export function webSearchHost(websearch: WebSearch.Interface): Plugin.Context["websearch"] {
   const location = Location.Info.make({
     directory: AbsolutePath.make("/tmp/websearch-test"),
-    project: {
-      id: Project.ID.make("websearch-test"),
-      directory: AbsolutePath.make("/tmp/websearch-test"),
-      canonical: AbsolutePath.make("/tmp/websearch-test"),
-    },
+    project: { id: Project.ID.make("websearch-test"), directory: AbsolutePath.make("/tmp/websearch-test") },
   })
   return {
     providers: () => websearch.providers().pipe(Effect.map((data) => ({ location, data }))),

packages/core/test/project.test.ts

@@ -47,13 +47,13 @@ describe("Project.list", () => {
       expect(yield* project.list()).toEqual([
         {
           id: Project.ID.make("newer"),
-          canonical: abs("/newer"),
+          worktree: abs("/newer"),
           time: { created: 2, updated: 2, initialized: 3 },
           sandboxes: [],
         },
         {
           id: Project.ID.make("older"),
-          canonical: abs("/older"),
+          worktree: abs("/older"),
           vcs: "git",
           name: "Older",
           icon: { color: "#000000" },
@@ -105,7 +105,6 @@ describe("Project.resolve", () => {
 
       expect(result.id).toBe(Project.ID.make("global"))
       expect(path.resolve(result.directory)).toBe(path.parse(tmp.path).root)
-      expect(result.canonical).toBe(result.directory)
       expect(result.previous).toBeUndefined()
       expect(result.vcs).toBeUndefined()
     }),
@@ -124,7 +123,6 @@ describe("Project.resolve", () => {
 
       expect(result.id).toBe(Project.ID.make("global"))
       expect(result.directory).toBe(yield* real(tmp.path))
-      expect(result.canonical).toBe(result.directory)
       expect(result.previous).toBeUndefined()
       expect(result.vcs?.type).toBe("git")
     }),
@@ -143,7 +141,6 @@ describe("Project.resolve", () => {
 
       expect(result.id).toBe(Project.ID.make(yield* Effect.promise(() => rootCommit(tmp.path))))
       expect(result.directory).toBe(yield* real(tmp.path))
-      expect(result.canonical).toBe(result.directory)
       expect(result.previous).toBeUndefined()
       expect(result.vcs?.type).toBe("git")
     }),
@@ -330,46 +327,13 @@ describe("Project.resolve", () => {
       yield* Effect.promise(() => Bun.write(path.join(tmp.path, ".git", "opencode"), "old-id"))
       yield* Effect.promise(() => $`git worktree add ${worktree} -b test-${Date.now()}`.cwd(tmp.path).quiet())
       const project = yield* Project.Service
-      const db = (yield* Database.Service).db
-      const id = remoteID("github.com/owner/repo")
-      yield* db
-        .insert(ProjectTable)
-        .values({
-          id,
-          worktree: abs("/stale-worktree"),
-          vcs: "hg",
-          name: "Preserved name",
-          icon_color: "#123456",
-          commands: { start: "bun dev" },
-          sandboxes: [abs("/preserved-sandbox")],
-          time_created: 1,
-          time_updated: 1,
-          time_initialized: 2,
-        })
-        .run()
 
       const result = yield* project.resolve(abs(worktree))
 
       expect(result.directory).toBe(yield* real(worktree))
-      expect(result.canonical).toBe(yield* real(tmp.path))
       expect(result.previous).toBe(Project.ID.make("old-id"))
-      expect(result.id).toBe(id)
+      expect(result.id).toBe(remoteID("github.com/owner/repo"))
       expect(result.vcs?.type).toBe("git")
-      expect((yield* project.list()).find((item) => item.id === id)).toMatchObject({
-        canonical: yield* real(tmp.path),
-        vcs: "git",
-        name: "Preserved name",
-        icon: { color: "#123456" },
-        commands: { start: "bun dev" },
-        sandboxes: [abs("/preserved-sandbox")],
-        time: { created: 1, initialized: 2 },
-      })
-      expect(
-        (yield* project.directories({ projectID: id })).toSorted((a, b) => a.directory.localeCompare(b.directory)),
-      ).toEqual([
-        { directory: yield* real(tmp.path) },
-        { directory: yield* real(worktree), strategy: "git_worktree" },
-      ])
     }),
   )
 })

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

@@ -34,7 +34,7 @@ const projects = Layer.succeed(
   Project.Service,
   Project.Service.of({
     list: () => Effect.succeed([]),
-    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
     directories: () => Effect.succeed([]),
     commit: () => Effect.void,
   }),

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

@@ -14,7 +14,7 @@ import { Model } from "@opencode-ai/core/model"
 import { Project } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { Provider } from "@opencode-ai/core/provider"
-import { AbsolutePath, RelativePath } from "@opencode-ai/core/schema"
+import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Session } from "@opencode-ai/core/session"
 import { SessionV1 } from "@opencode-ai/core/v1/session"
 import { SessionMessage } from "@opencode-ai/core/session/message"
@@ -32,7 +32,7 @@ const projects = Layer.succeed(
   Project.Service,
   Project.Service.of({
     list: () => Effect.succeed([]),
-    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
     directories: () => Effect.succeed([]),
     commit: () => Effect.void,
   }),
@@ -71,27 +71,6 @@ function withTmp<A, E, R>(f: (directory: string) => Effect.Effect<A, E, R>) {
 }
 
 describe("Session.create", () => {
-  it.effect("persists a missing title until one is generated or supplied", () =>
-    Effect.gen(function* () {
-      const session = yield* Session.Service
-      const { db } = yield* Database.Service
-
-      const created = yield* session.create({ location })
-      const row = yield* db.select().from(SessionTable).where(eq(SessionTable.id, created.id)).get().pipe(Effect.orDie)
-      const event = yield* db
-        .select({ data: EventTable.data })
-        .from(EventTable)
-        .where(eq(EventTable.aggregate_id, created.id))
-        .get()
-        .pipe(Effect.orDie)
-
-      expect(created.title).toBeUndefined()
-      expect(row?.title).toBeNull()
-      expect(event?.data).not.toHaveProperty("info.title")
-      expect((yield* session.create({ location, title: "Explicit title" })).title).toBe("Explicit title")
-    }),
-  )
-
   it.effect("creates a fresh projected session when the ID is omitted", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
@@ -192,30 +171,6 @@ describe("Session.create", () => {
     }),
   )
 
-  it.effect("orders sessions by their latest prompt", () =>
-    Effect.gen(function* () {
-      const session = yield* Session.Service
-      const { db } = yield* Database.Service
-      const active = yield* session.create({ location, title: "active" })
-      const newer = yield* session.create({ location, title: "newer" })
-
-      yield* db
-        .update(SessionTable)
-        .set({ time_created: -2, time_updated: -2 })
-        .where(eq(SessionTable.id, active.id))
-        .run()
-      yield* db
-        .update(SessionTable)
-        .set({ time_created: -1, time_updated: -1 })
-        .where(eq(SessionTable.id, newer.id))
-        .run()
-
-      yield* session.prompt({ sessionID: active.id, text: "continue", resume: false })
-
-      expect((yield* session.list()).data.map((item) => item.id)).toEqual([active.id, newer.id])
-    }),
-  )
-
   it.effect("filters direct child sessions by parent ID", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
@@ -229,26 +184,6 @@ describe("Session.create", () => {
     }),
   )
 
-  it.effect("filters project sessions by subpath", () =>
-    Effect.gen(function* () {
-      const session = yield* Session.Service
-      const { db } = yield* Database.Service
-      const root = yield* session.create({ location, title: "root" })
-      const nested = yield* session.create({ location, title: "nested" })
-
-      yield* db.update(SessionTable).set({ path: "packages/tui" }).where(eq(SessionTable.id, nested.id)).run()
-
-      const page = yield* session.list({
-        project: Project.ID.global,
-        subpath: RelativePath.make("packages/tui"),
-        parentID: null,
-      })
-
-      expect(page.data.map((item) => item.id)).toEqual([nested.id])
-      expect(page.data.map((item) => item.id)).not.toContain(root.id)
-    }),
-  )
-
   it.effect("forks a session by replaying a durable fork event into copied projected rows", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service
@@ -317,23 +252,6 @@ describe("Session.create", () => {
     }),
   )
 
-  it.effect("keeps a fork untitled when its parent is untitled", () =>
-    Effect.gen(function* () {
-      const session = yield* Session.Service
-      const bus = yield* Bus.Service
-      const { db } = yield* Database.Service
-      const parent = yield* session.create({ location })
-      yield* session.prompt({ sessionID: parent.id, text: "First", resume: false })
-      yield* SessionPending.promote(db, bus, parent.id, "steer")
-
-      const forked = yield* session.fork({ sessionID: parent.id, boundary: { type: "through" } })
-      const row = yield* db.select().from(SessionTable).where(eq(SessionTable.id, forked.id)).get().pipe(Effect.orDie)
-
-      expect(forked.title).toBeUndefined()
-      expect(row?.title).toBeNull()
-    }),
-  )
-
   it.effect("rejects forking an empty session", () =>
     Effect.gen(function* () {
       const session = yield* Session.Service

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

@@ -15,6 +15,7 @@ import { Location } from "@opencode-ai/core/location"
 import { McpInstructions } from "@opencode-ai/core/mcp/instructions"
 import { ID } from "@opencode-ai/core/model"
 import { Project } from "@opencode-ai/core/project"
+import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { Provider } from "@opencode-ai/core/provider"
 import { ReferenceInstructions } from "@opencode-ai/core/reference/instructions"
 import { AbsolutePath } from "@opencode-ai/core/schema"
@@ -190,6 +191,11 @@ const setup = Effect.gen(function* () {
       agent.mode = "primary"
     }),
   )
+  yield* db
+    .insert(ProjectTable)
+    .values({ id: Project.ID.global, worktree: AbsolutePath.make("/project"), sandboxes: [] })
+    .run()
+    .pipe(Effect.orDie)
   yield* db
     .insert(SessionTable)
     .values({

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

@@ -54,7 +54,7 @@ const projects = Layer.succeed(
   Project.Service,
   Project.Service.of({
     list: () => Effect.succeed([]),
-    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
     directories: () => Effect.succeed([]),
     commit: () => Effect.void,
   }),

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

@@ -21,7 +21,7 @@ const projects = Layer.succeed(
   Project.Service,
   Project.Service.of({
     list: () => Effect.succeed([]),
-    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
     directories: () => Effect.succeed([]),
     commit: () => Effect.void,
   }),

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

@@ -17,7 +17,7 @@ const projects = Layer.succeed(
   Project.Service,
   Project.Service.of({
     list: () => Effect.succeed([]),
-    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+    resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
     directories: () => Effect.succeed([]),
     commit: () => Effect.void,
   }),

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

@@ -796,59 +796,6 @@ const verifyPartialFlushOnInterruption = (kind: FragmentKind) =>
   })
 
 describe("SessionRunnerLLM", () => {
-  it.effect("retries title generation from the first prompt after execution and title failures", () =>
-    Effect.gen(function* () {
-      const session = yield* setup
-      const agents = yield* Agent.Service
-      const { db } = yield* Database.Service
-      yield* db.update(SessionTable).set({ title: null }).where(eq(SessionTable.id, sessionID)).run().pipe(Effect.orDie)
-      yield* agents.transform((draft) =>
-        draft.update(Agent.ID.make("title"), (agent) => {
-          agent.mode = "primary"
-          agent.hidden = true
-          agent.system = "Generate a title."
-        }),
-      )
-
-      yield* admit(session, "First prompt")
-      yield* TestLLM.push(Stream.fail(invalidRequest()))
-      expect((yield* session.resume(sessionID).pipe(Effect.exit))._tag).toBe("Failure")
-
-      yield* admit(session, "Second prompt")
-      const titleFailed = yield* Deferred.make<void>()
-      yield* TestLLM.push(
-        TestLLM.text("Recovered", "text-recovered"),
-        Stream.make(LLMEvent.providerError({ message: "Title provider unavailable" })).pipe(
-          Stream.ensuring(Deferred.succeed(titleFailed, undefined)),
-        ),
-      )
-      yield* session.resume(sessionID)
-      yield* Deferred.await(titleFailed)
-      yield* Effect.yieldNow
-      expect((yield* session.get(sessionID)).title).toBeUndefined()
-
-      const bus = yield* Bus.Service
-      const renamed = yield* bus.subscribe(SessionEvent.Renamed).pipe(
-        Stream.filter((event) => event.data.sessionID === sessionID),
-        Stream.take(1),
-        Stream.runCollect,
-        Effect.forkScoped({ startImmediately: true }),
-      )
-      yield* admit(session, "Third prompt")
-      yield* TestLLM.push(
-        TestLLM.text("Recovered again", "text-recovered-again"),
-        TestLLM.text("Generated title", "text-title"),
-      )
-      yield* session.resume(sessionID)
-      yield* Fiber.join(renamed)
-
-      expect(requests).toHaveLength(5)
-      expect(requests[2]?.messages).toContainEqual(Message.user("First prompt"))
-      expect(requests[4]?.messages).toContainEqual(Message.user("First prompt"))
-      expect((yield* session.get(sessionID)).title).toBe("Generated title")
-    }),
-  )
-
   it.effect("applies session context hooks without exposing unavailable tools", () =>
     Effect.gen(function* () {
       const session = yield* setup

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

@@ -20,7 +20,7 @@ import { testEffect } from "./lib/effect"
 
 const location = Location.Ref.make({ directory: AbsolutePath.make("/project") })
 const projects = Layer.mock(Project.Service, {
-  resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+  resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
 })
 const skills = Layer.mock(Skill.Service, {
   list: () =>

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

@@ -20,7 +20,7 @@ import { ProjectTable } from "@opencode-ai/core/project/sql"
 import { App } from "@opencode-ai/core/app"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Money } from "@opencode-ai/schema/money"
-import { Deferred, Effect, Fiber, Layer, Stream } from "effect"
+import { Effect, Layer, Stream } from "effect"
 import { testEffect } from "./lib/effect"
 
 let requests: LLMRequest[] = []
@@ -39,30 +39,27 @@ const cost = [
     },
   },
 ]
-const successfulTitle = () =>
-  Stream.make(
-    LLMEvent.textDelta({ id: "title", text: "Generated Title\n" }),
-    LLMEvent.stepFinish({
-      index: 0,
-      reason: { normalized: "stop" },
-      usage: {
-        inputTokens: 15,
-        outputTokens: 6,
-        nonCachedInputTokens: 10,
-        cacheReadInputTokens: 3,
-        cacheWriteInputTokens: 2,
-        reasoningTokens: 2,
-      },
-    }),
-    LLMEvent.finish({
-      reason: { normalized: "stop" },
-    }),
-  )
-let titleStream: () => Stream.Stream<LLMEvent> = successfulTitle
 const client = Layer.mock(LLMClient.Service)({
   stream: (request: LLMRequest) => {
     requests.push(request)
-    return titleStream()
+    return Stream.make(
+      LLMEvent.textDelta({ id: "title", text: "Generated Title\n" }),
+      LLMEvent.stepFinish({
+        index: 0,
+        reason: { normalized: "stop" },
+        usage: {
+          inputTokens: 15,
+          outputTokens: 6,
+          nonCachedInputTokens: 10,
+          cacheReadInputTokens: 3,
+          cacheWriteInputTokens: 2,
+          reasoningTokens: 2,
+        },
+      }),
+      LLMEvent.finish({
+        reason: { normalized: "stop" },
+      }),
+    )
   },
   generate: () => Effect.die("unused"),
 })
@@ -92,7 +89,7 @@ const it = testEffect(
   ),
 )
 
-const insertSession = (id: Session.ID, title?: string, created?: number) =>
+const insertSession = (id: Session.ID) =>
   Effect.gen(function* () {
     const { db } = yield* Database.Service
     yield* db
@@ -108,8 +105,7 @@ const insertSession = (id: Session.ID, title?: string, created?: number) =>
         project_id: Project.ID.global,
         slug: id,
         directory: "/project",
-        title,
-        time_created: created,
+        title: "New session - fake",
         version: "test",
       })
       .onConflictDoNothing()
@@ -135,7 +131,6 @@ const prompt = (sessionID: Session.ID, text: string) =>
 it.effect("generates a title from the sole user message and renames the session", () =>
   Effect.gen(function* () {
     requests = []
-    titleStream = successfulTitle
     const agentService = yield* Agent.Service
     yield* agentService.transform((editor) => {
       editor.update(Agent.ID.make("title"), (agent) => {
@@ -149,8 +144,11 @@ it.effect("generates a title from the sole user message and renames the session"
     yield* prompt(sessionID, "Help me debug the failing build")
 
     const store = yield* SessionStore.Service
+    const session = yield* store
+      .get(sessionID)
+      .pipe(Effect.flatMap((session) => (session ? Effect.succeed(session) : Effect.die("session missing"))))
     const title = yield* SessionTitle.Service
-    yield* title.generateForFirstPrompt(sessionID)
+    yield* title.generateForFirstPrompt(session)
 
     expect(requests).toHaveLength(1)
     expect(requests[0]?.http?.headers).toEqual({
@@ -169,10 +167,9 @@ it.effect("generates a title from the sole user message and renames the session"
   }),
 )
 
-it.effect("generates from the first user message after later messages exist", () =>
+it.effect("does not generate once a second user message exists", () =>
   Effect.gen(function* () {
     requests = []
-    titleStream = successfulTitle
     const agentService = yield* Agent.Service
     yield* agentService.transform((editor) => {
       editor.update(Agent.ID.make("title"), (agent) => {
@@ -187,46 +184,21 @@ it.effect("generates from the first user message after later messages exist", ()
     yield* prompt(sessionID, "Second message")
 
     const store = yield* SessionStore.Service
+    const session = yield* store
+      .get(sessionID)
+      .pipe(Effect.flatMap((session) => (session ? Effect.succeed(session) : Effect.die("session missing"))))
     const title = yield* SessionTitle.Service
-    yield* title.generateForFirstPrompt(sessionID)
+    yield* title.generateForFirstPrompt(session)
 
-    expect(requests).toHaveLength(1)
-    expect(JSON.stringify(requests[0]?.messages)).toContain("First message")
-    expect(JSON.stringify(requests[0]?.messages)).not.toContain("Second message")
-    expect((yield* store.get(sessionID))?.title).toBe("Generated Title")
-  }),
-)
-
-it.effect("retries a legacy persisted fallback title", () =>
-  Effect.gen(function* () {
-    requests = []
-    titleStream = successfulTitle
-    const agentService = yield* Agent.Service
-    yield* agentService.transform((editor) => {
-      editor.update(Agent.ID.make("title"), (agent) => {
-        agent.mode = "primary"
-        agent.hidden = true
-        agent.system = "You are a title generator."
-      })
-    })
-    const sessionID = Session.ID.make("ses_title_legacy")
-    const created = Date.parse("2026-07-30T18:45:03.662Z")
-    yield* insertSession(sessionID, "New session - 2026-07-30T18:45:03.662Z", created)
-    yield* prompt(sessionID, "Retry the legacy title")
-
-    const title = yield* SessionTitle.Service
-    yield* title.generateForFirstPrompt(sessionID)
-
-    const store = yield* SessionStore.Service
-    expect(requests).toHaveLength(1)
-    expect((yield* store.get(sessionID))?.title).toBe("Generated Title")
+    expect(requests).toHaveLength(0)
+    const untouched = yield* store.get(sessionID)
+    expect(untouched?.title).toBe("New session - fake")
   }),
 )
 
 it.effect("does not generate for a child session", () =>
   Effect.gen(function* () {
     requests = []
-    titleStream = successfulTitle
     const agentService = yield* Agent.Service
     yield* agentService.transform((editor) => {
       editor.update(Agent.ID.make("title"), (agent) => {
@@ -251,6 +223,7 @@ it.effect("does not generate for a child session", () =>
         parent_id: Session.ID.make("ses_title_parent"),
         slug: sessionID,
         directory: "/project",
+        title: "Child session - fake",
         version: "test",
       })
       .onConflictDoNothing()
@@ -258,8 +231,12 @@ it.effect("does not generate for a child session", () =>
       .pipe(Effect.orDie)
     yield* prompt(sessionID, "Do this subtask")
 
+    const store = yield* SessionStore.Service
+    const session = yield* store
+      .get(sessionID)
+      .pipe(Effect.flatMap((session) => (session ? Effect.succeed(session) : Effect.die("session missing"))))
     const title = yield* SessionTitle.Service
-    yield* title.generateForFirstPrompt(sessionID)
+    yield* title.generateForFirstPrompt(session)
 
     expect(requests).toHaveLength(0)
   }),
@@ -268,100 +245,19 @@ it.effect("does not generate for a child session", () =>
 it.effect("does not generate when the title agent is removed", () =>
   Effect.gen(function* () {
     requests = []
-    titleStream = successfulTitle
     const sessionID = Session.ID.make("ses_title_no_agent")
     yield* insertSession(sessionID)
     yield* prompt(sessionID, "Help me debug the failing build")
 
     const store = yield* SessionStore.Service
+    const session = yield* store
+      .get(sessionID)
+      .pipe(Effect.flatMap((session) => (session ? Effect.succeed(session) : Effect.die("session missing"))))
     const title = yield* SessionTitle.Service
-    yield* title.generateForFirstPrompt(sessionID)
+    yield* title.generateForFirstPrompt(session)
 
     expect(requests).toHaveLength(0)
     const untouched = yield* store.get(sessionID)
-    expect(untouched?.title).toBeUndefined()
-  }),
-)
-
-it.effect("does not overwrite an explicit title", () =>
-  Effect.gen(function* () {
-    requests = []
-    titleStream = successfulTitle
-    const sessionID = Session.ID.make("ses_title_explicit")
-    yield* insertSession(sessionID)
-    yield* prompt(sessionID, "Help me debug the failing build")
-    const events = yield* Bus.Service
-    yield* events.publish(SessionEvent.Renamed, { sessionID, title: "New session - 2099-01-01T00:00:00.000Z" })
-
-    const title = yield* SessionTitle.Service
-    yield* title.generateForFirstPrompt(sessionID)
-
-    const store = yield* SessionStore.Service
-    expect(requests).toHaveLength(0)
-    expect((yield* store.get(sessionID))?.title).toBe("New session - 2099-01-01T00:00:00.000Z")
-  }),
-)
-
-it.effect("retries after a failed title request", () =>
-  Effect.gen(function* () {
-    requests = []
-    const agentService = yield* Agent.Service
-    yield* agentService.transform((editor) => {
-      editor.update(Agent.ID.make("title"), (agent) => {
-        agent.mode = "primary"
-        agent.hidden = true
-        agent.system = "You are a title generator."
-      })
-    })
-    const sessionID = Session.ID.make("ses_title_retry")
-    yield* insertSession(sessionID)
-    yield* prompt(sessionID, "Retry this title")
-    const title = yield* SessionTitle.Service
-    titleStream = () => Stream.make(LLMEvent.providerError({ message: "Provider unavailable" }))
-
-    yield* title.generateForFirstPrompt(sessionID)
-    titleStream = successfulTitle
-    yield* title.generateForFirstPrompt(sessionID)
-
-    const store = yield* SessionStore.Service
-    expect(requests).toHaveLength(2)
-    expect((yield* store.get(sessionID))?.title).toBe("Generated Title")
-  }),
-)
-
-it.effect("preserves a manual rename completed while generation is in flight", () =>
-  Effect.gen(function* () {
-    requests = []
-    const agentService = yield* Agent.Service
-    yield* agentService.transform((editor) => {
-      editor.update(Agent.ID.make("title"), (agent) => {
-        agent.mode = "primary"
-        agent.hidden = true
-        agent.system = "You are a title generator."
-      })
-    })
-    const sessionID = Session.ID.make("ses_title_manual_rename")
-    yield* insertSession(sessionID)
-    yield* prompt(sessionID, "Generate this title")
-    const started = yield* Deferred.make<void>()
-    const release = yield* Deferred.make<void>()
-    titleStream = () =>
-      Stream.unwrap(
-        Deferred.succeed(started, undefined).pipe(
-          Effect.andThen(Deferred.await(release)),
-          Effect.as(successfulTitle()),
-        ),
-      )
-    const title = yield* SessionTitle.Service
-    const fiber = yield* title.generateForFirstPrompt(sessionID).pipe(Effect.forkScoped)
-    yield* Deferred.await(started)
-    const events = yield* Bus.Service
-    yield* events.publish(SessionEvent.Renamed, { sessionID, title: "Manual title" })
-    yield* Deferred.succeed(release, undefined)
-    yield* Fiber.join(fiber)
-
-    const store = yield* SessionStore.Service
-    expect(requests).toHaveLength(1)
-    expect((yield* store.get(sessionID))?.title).toBe("Manual title")
+    expect(untouched?.title).toBe("New session - fake")
   }),
 )

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

@@ -17,7 +17,7 @@ import { testEffect } from "./lib/effect"
 const location = Location.Ref.make({ directory: AbsolutePath.make("/project") })
 const awaited: Session.ID[] = []
 const projects = Layer.mock(Project.Service, {
-  resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory, canonical: directory }),
+  resolve: (directory) => Effect.succeed({ id: Project.ID.global, directory }),
 })
 const execution = Layer.mock(SessionExecution.Service, {
   awaitIdle: (sessionID) => Effect.sync(() => awaited.push(sessionID)),

packages/core/test/shell-parse.test.ts

@@ -1,55 +0,0 @@
-import { describe, expect, test } from "bun:test"
-import { Effect } from "effect"
-import os from "os"
-import path from "path"
-import { ShellParse } from "@opencode-ai/core/shell/parse"
-
-describe("ShellParse", () => {
-  test("splits bash commands and derives reusable prefixes", async () => {
-    const result = await Effect.runPromise(
-      ShellParse.scan("git status && npm run test -- --watch", "/bin/bash", "/workspace"),
-    )
-    expect(result).toEqual({
-      commands: [
-        { resource: "git status", save: "git status *" },
-        { resource: "npm run test -- --watch", save: "npm run test *" },
-      ],
-      directories: [],
-    })
-  })
-
-  test("splits PowerShell commands case-insensitively", async () => {
-    const result = await Effect.runPromise(
-      ShellParse.scan("Get-ChildItem; Write-Output 'done'", "C:\\Program Files\\PowerShell\\7\\pwsh.exe", "C:\\workspace"),
-    )
-    expect(result.commands).toEqual([
-      { resource: "Get-ChildItem", save: "Get-ChildItem *" },
-      { resource: "Write-Output 'done'", save: "Write-Output *" },
-    ])
-  })
-
-  test("does not permission directory changes separately", async () => {
-    const result = await Effect.runPromise(ShellParse.scan("cd 'src dir' && git status", "/bin/bash", "/workspace"))
-    expect(result).toEqual({
-      commands: [{ resource: "git status", save: "git status *" }],
-      directories: ["src dir"],
-    })
-  })
-
-  test("extracts PowerShell directory parameters", async () => {
-    const result = await Effect.runPromise(
-      ShellParse.scan("Set-Location -LiteralPath '..\\outside'; Get-ChildItem", "pwsh", "C:\\workspace"),
-    )
-    expect(result.directories).toEqual(["..\\outside"])
-  })
-
-  test("expands deterministic directory variables", async () => {
-    const bash = await Effect.runPromise(ShellParse.scan("cd ~/src", "/bin/bash", "/workspace"))
-    expect(bash.directories).toEqual([path.join(os.homedir(), "src")])
-
-    const powershell = await Effect.runPromise(
-      ShellParse.scan('Set-Location "$PWD/src"; Set-Location $PSHOME', "/usr/local/bin/pwsh", "/workspace"),
-    )
-    expect(powershell.directories).toEqual(["/workspace/src", "/usr/local/bin"])
-  })
-})

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

@@ -5,7 +5,6 @@ import { Effect, Layer } from "effect"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { FileMutation } from "@opencode-ai/core/file-mutation"
-import { Formatter } from "@opencode-ai/core/formatter"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Location } from "@opencode-ai/core/location"
 import { LocationMutation } from "@opencode-ai/core/location-mutation"
@@ -23,7 +22,7 @@ import { toolIdentity, executeTool, registerToolPlugin, toolDefinitions } from "
 const editToolNode = makeLocationNode({
   name: "test/edit-tool-plugin",
   layer: Layer.effectDiscard(registerToolPlugin(EditTool.Plugin)),
-  deps: [Tool.node, LocationMutation.node, FileMutation.node, Formatter.node, FSUtil.node, Permission.node],
+  deps: [Tool.node, LocationMutation.node, FileMutation.node, FSUtil.node, Permission.node],
 })
 
 const sessionID = Session.ID.make("ses_edit_tool_test")
@@ -32,7 +31,6 @@ const writes: string[] = []
 let reads = 0
 let denyAction: string | undefined
 let afterRead = (_target: string, _content: Uint8Array): Effect.Effect<void> => Effect.void
-let formatFile = (_target: string): Effect.Effect<boolean> => Effect.succeed(false)
 
 const permission = Layer.succeed(
   Permission.Service,
@@ -59,17 +57,12 @@ const permission = Layer.succeed(
   }),
 )
 
-const formatter = Layer.mock(Formatter.Service, {
-  file: (target) => formatFile(target),
-})
-
 const reset = () => {
   assertions.length = 0
   writes.length = 0
   reads = 0
   denyAction = undefined
   afterRead = () => Effect.void
-  formatFile = () => Effect.succeed(false)
 }
 
 const filesystem = Layer.effect(
@@ -116,7 +109,6 @@ const withTool = <A, E, R>(directory: string, body: (registry: Tool.Interface) =
         [
           [FSUtil.node, filesystem],
           [Location.node, activeLocation],
-          [Formatter.node, formatter],
           [Permission.node, permission],
         ],
       ),
@@ -179,17 +171,6 @@ describe("EditTool", () => {
                 })
                 expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("after\nrest\n")
                 expect(assertions).toMatchObject([{ sessionID, action: "edit", resources: ["hello.txt"], save: ["*"] }])
-                expect(assertions[0]?.metadata).toMatchObject({
-                  files: [
-                    {
-                      file: "hello.txt",
-                      status: "modified",
-                      additions: 1,
-                      deletions: 1,
-                      patch: expect.stringContaining("-before\n+after"),
-                    },
-                  ],
-                })
                 expect(writes).toEqual([yield* Effect.promise(() => fs.realpath(target))])
               }),
             ),
@@ -200,39 +181,6 @@ describe("EditTool", () => {
     ),
   )
 
-  it.live("returns the diff for final formatted content", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => {
-        reset()
-        const target = path.join(tmp.path, "formatted.txt")
-        formatFile = (file) =>
-          Effect.promise(async () => {
-            await fs.writeFile(file, (await fs.readFile(file, "utf8")).replace("after", "AFTER"))
-            return true
-          })
-        return Effect.promise(() => fs.writeFile(target, "before\n")).pipe(
-          Effect.andThen(
-            withTool(tmp.path, (registry) =>
-              Effect.gen(function* () {
-                const settled = yield* executeTool(
-                  registry,
-                  call({ path: "formatted.txt", oldString: "before", newString: "after" }),
-                )
-                expect(settled.status).toBe("completed")
-                if (settled.status !== "completed") return
-                expect(settled.output.files[0]?.patch).toContain("-before\n+AFTER")
-                expect(settled.metadata?.files?.[0]?.patch).toContain("-before\n+AFTER")
-                expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("AFTER\n")
-              }),
-            ),
-          ),
-        )
-      },
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-    ),
-  )
-
   it.live("accepts an absolute file path inside the active Location", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
@@ -354,7 +302,7 @@ describe("EditTool", () => {
             error: { type: "permission.rejected", message: "Permission denied: edit" },
           })
           expect(assertions.map((input) => input.action)).toEqual(["external_directory", "edit"])
-          expect(reads).toBe(1)
+          expect(reads).toBe(0)
           expect(writes).toEqual([])
           expect(yield* Effect.promise(() => fs.readFile(external, "utf8"))).toBe("before")
         }),
@@ -365,7 +313,7 @@ describe("EditTool", () => {
     ),
   )
 
-  it.live("denied edit does not disclose whether oldString matches", () =>
+  it.live("denied edit reads no target content and does not disclose whether oldString matches", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
       (tmp) => {
@@ -391,7 +339,7 @@ describe("EditTool", () => {
                 })
                 expect(missing).toEqual(matching)
                 expect(assertions.map((input) => input.action)).toEqual(["edit", "edit"])
-                expect(reads).toBe(2)
+                expect(reads).toBe(0)
                 expect(writes).toEqual([])
               }),
             ),
@@ -626,11 +574,6 @@ describe("EditTool", () => {
       (tmp) => {
         reset()
         const target = path.join(tmp.path, "windows.txt")
-        formatFile = (file) =>
-          Effect.promise(async () => {
-            await fs.writeFile(file, (await fs.readFile(file, "utf8")).replace(/^\uFEFF/, ""))
-            return true
-          })
         return Effect.promise(() => fs.writeFile(target, "\uFEFFbefore\r\nrest\r\n")).pipe(
           Effect.andThen(
             withTool(tmp.path, (registry) =>

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

@@ -6,7 +6,6 @@ import { systemError } from "effect/PlatformError"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { FSUtil } from "@opencode-ai/util/fs-util"
-import { Formatter } from "@opencode-ai/core/formatter"
 import { Location } from "@opencode-ai/core/location"
 import { Permission } from "@opencode-ai/core/permission"
 import { AbsolutePath } from "@opencode-ai/core/schema"
@@ -22,7 +21,7 @@ import { toolIdentity, executeTool, registerToolPlugin, toolDefinitions } from "
 const patchToolNode = makeLocationNode({
   name: "test/patch-tool-plugin",
   layer: Layer.effectDiscard(registerToolPlugin(PatchTool.Plugin)),
-  deps: [Tool.node, Formatter.node, FSUtil.node, Location.node, Permission.node],
+  deps: [Tool.node, FSUtil.node, Location.node, Permission.node],
 })
 
 const sessionID = Session.ID.make("ses_patch_tool_test")
@@ -34,7 +33,6 @@ let failWriteTarget: string | undefined
 let readsBeforeEditApproval = 0
 let editApproved = false
 let afterEditApproval = (): Effect.Effect<void> => Effect.void
-let formatFile = (_target: string): Effect.Effect<boolean> => Effect.succeed(false)
 
 const permission = Layer.succeed(
   Permission.Service,
@@ -65,10 +63,6 @@ const permission = Layer.succeed(
   }),
 )
 
-const formatter = Layer.mock(Formatter.Service, {
-  file: (target) => formatFile(target),
-})
-
 const reset = () => {
   assertions.length = 0
   denyAction = undefined
@@ -78,7 +72,6 @@ const reset = () => {
   readsBeforeEditApproval = 0
   editApproved = false
   afterEditApproval = () => Effect.void
-  formatFile = () => Effect.succeed(false)
 }
 
 const filesystem = Layer.effect(
@@ -142,7 +135,6 @@ const withTool = <A, E, R>(
       AppNodeBuilder.build(LayerNode.group([Tool.node, patchToolNode]), [
         [FSUtil.node, filesystem],
         [Location.node, activeLocation],
-        [Formatter.node, formatter],
         [Permission.node, permission],
       ]),
     ),
@@ -262,28 +254,6 @@ describe("PatchTool", () => {
     ),
   )
 
-  it.live("returns file diffs for final formatted content", () =>
-    withTempTool((directory, registry) => {
-      const target = path.join(directory, "formatted.txt")
-      formatFile = (file) =>
-        Effect.promise(async () => {
-          await fs.writeFile(file, (await fs.readFile(file, "utf8")).replace("created", "FORMATTED"))
-          return true
-        })
-      return Effect.gen(function* () {
-        const settled = yield* executeTool(
-          registry,
-          call("*** Begin Patch\n*** Add File: formatted.txt\n+created\n*** End Patch"),
-        )
-        expect(settled.status).toBe("completed")
-        if (settled.status !== "completed") return
-        expect(settled.output.files[0]?.patch).toContain("+FORMATTED")
-        expect(settled.metadata?.files?.[0]?.patch).toContain("+FORMATTED")
-        expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("FORMATTED\n")
-      })
-    }),
-  )
-
   it.live("moves and updates a file", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
@@ -582,11 +552,6 @@ describe("PatchTool", () => {
         const bom = "\uFEFF"
         const target = path.join(directory, "example.cs")
         yield* Effect.promise(() => fs.writeFile(target, `${bom}using System;\n\nclass Test {}\n`))
-        formatFile = (file) =>
-          Effect.promise(async () => {
-            await fs.writeFile(file, (await fs.readFile(file, "utf8")).replace(/^\uFEFF/, ""))
-            return true
-          })
         const settled = yield* executeTool(
           registry,
           call("*** Begin Patch\n*** Update File: example.cs\n@@\n class Test {}\n+class Next {}\n*** End Patch"),

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

@@ -1,6 +1,5 @@
 import fs from "fs/promises"
 import { realpathSync } from "node:fs"
-import os from "os"
 import path from "path"
 import { describe, expect } from "bun:test"
 import { DateTime, Deferred, Duration, Effect, Fiber, Layer, Scope, Stream } from "effect"
@@ -158,9 +157,6 @@ const mixedOutputCommand = isWindows
   ? "[Console]::Out.Write('stdout'); Start-Sleep -Milliseconds 50; [Console]::Error.Write('stderr'); Start-Sleep -Milliseconds 100"
   : "printf stdout; sleep 0.05; printf stderr >&2"
 const idleCommand = isWindows ? "Start-Sleep -Seconds 60" : "sleep 60"
-const timeoutOutputCommand = isWindows
-  ? "[Console]::Out.Write('before timeout'); Start-Sleep -Seconds 60"
-  : "printf 'before timeout'; sleep 60"
 const steadyProgressCommand = isWindows
   ? "[Console]::Out.Write('steady'); Start-Sleep -Milliseconds 3400"
   : "printf steady; sleep 3.4"
@@ -223,10 +219,7 @@ describe("ShellTool", () => {
               type: "text",
               text: expect.stringContaining("Command exited with code 0."),
             })
-            expect(assertions).toMatchObject([
-              { sessionID, action: "shell", resources: [isWindows ? "Start-Sleep -Milliseconds 100" : helloCommand] },
-            ])
-            expect(assertions[0]?.save).toEqual([isWindows ? "Start-Sleep *" : "printf *"])
+            expect(assertions).toMatchObject([{ sessionID, action: "shell", resources: [helloCommand] }])
           }),
         )
       },
@@ -257,29 +250,6 @@ describe("ShellTool", () => {
     ),
   )
 
-  it.live("permissions compound commands separately", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => {
-        reset()
-        return withSession(tmp.path, (registry) =>
-          executeTool(registry, call({ command: "printf one && printf two" }, "call-compound")),
-        ).pipe(
-          Effect.andThen(
-            Effect.sync(() => {
-              expect(assertions).toHaveLength(1)
-              expect(assertions[0]).toMatchObject({
-                resources: ["printf one", "printf two"],
-                save: ["printf *", "printf *"],
-              })
-            }),
-          ),
-        )
-      },
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]().then(() => undefined)),
-    ),
-  )
-
   it.live("captures stderr-only and mixed stdout/stderr output", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
@@ -352,51 +322,6 @@ describe("ShellTool", () => {
     ),
   )
 
-  it.live("approves an external directory used by a directory-change command", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => Promise.all([tmpdir(), tmpdir()])),
-      ([active, outside]) => {
-        reset()
-        const command = isWindows
-          ? `Set-Location -LiteralPath '${outside.path}'; (Get-Location).Path`
-          : `cd '${outside.path}' && pwd`
-        return withSession(active.path, (registry) => executeTool(registry, call({ command }, "call-external-cd"))).pipe(
-          Effect.andThen(
-            Effect.sync(() => {
-              expect(assertions.map((item) => item.action)).toEqual(["external_directory", "shell"])
-              expect(assertions[0]).toMatchObject({
-                resources: [path.join(realpathSync(outside.path), "*").replaceAll("\\", "/")],
-              })
-            }),
-          ),
-        )
-      },
-      ([active, outside]) =>
-        Effect.promise(() =>
-          Promise.all([active[Symbol.asyncDispose](), outside[Symbol.asyncDispose]()]).then(() => undefined),
-        ),
-    ),
-  )
-
-  it.live("approves an expanded external home directory", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => {
-        reset()
-        const command = isWindows ? "Set-Location $HOME; (Get-Location).Path" : "cd ~ && pwd"
-        return withSession(tmp.path, (registry) => executeTool(registry, call({ command }, "call-external-home"))).pipe(
-          Effect.andThen(
-            Effect.sync(() => {
-              expect(assertions.map((item) => item.action)).toEqual(["external_directory", "shell"])
-              expect(assertions[0]?.resources[0]).toStartWith(os.homedir().replaceAll("\\", "/"))
-            }),
-          ),
-        )
-      },
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]().then(() => undefined)),
-    ),
-  )
-
   it.live("does not execute after external-directory or shell denial", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => Promise.all([tmpdir(), tmpdir()])),
@@ -536,18 +461,14 @@ describe("ShellTool", () => {
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
       (tmp) => {
-          reset()
-          return withSession(tmp.path, (registry) =>
-            executeTool(registry, call({ command: timeoutOutputCommand, timeout: isWindows ? 500 : 50 })),
-          ).pipe(
-            Effect.andThen((settled) =>
-              Effect.sync(() => {
-                expect(settled.metadata).toMatchObject({ timeout: true, truncated: false })
-                expect(settled.content?.[0]).toMatchObject({
-                  type: "text",
-                  text: expect.stringContaining("before timeout"),
-                })
-                expect(settled.content?.[1]).toMatchObject({
+        reset()
+        return withSession(tmp.path, (registry) =>
+          executeTool(registry, call({ command: idleCommand, timeout: 50 })),
+        ).pipe(
+          Effect.andThen((settled) =>
+            Effect.sync(() => {
+              expect(settled.metadata).toMatchObject({ timeout: true, truncated: false })
+              expect(settled.content?.[1]).toMatchObject({
                 type: "text",
                 text: expect.stringContaining("Command timed out"),
               })
@@ -559,6 +480,44 @@ describe("ShellTool", () => {
     ),
   )
 
+  it.live("retains partial output when a foreground command is interrupted", () =>
+    Effect.acquireUseRelease(
+      Effect.promise(() => tmpdir()),
+      (tmp) => {
+        reset()
+        return withSession(tmp.path, (registry) =>
+          Effect.gen(function* () {
+            const jobs = yield* Job.Service
+            const shell = yield* Shell.Service
+            const scope = yield* Scope.Scope
+            const waiting = yield* executeTool(
+              registry,
+              call({ command: steadyProgressCommand }, "call-interrupt-output"),
+            ).pipe(Effect.forkIn(scope, { startImmediately: true }))
+
+            const waitForShell = (remaining = 1000): Effect.Effect<ShellSchema.ID, Error> =>
+              Effect.gen(function* () {
+                const job = yield* jobs.get("call-interrupt-output")
+                const shellID = job?.metadata?.shellID
+                if (typeof shellID === "string") return ShellSchema.ID.make(shellID)
+                if (remaining <= 0) return yield* Effect.fail(new Error("Timed out waiting for foreground shell"))
+                yield* Effect.promise(() => Bun.sleep(1))
+                return yield* waitForShell(remaining - 1)
+              })
+            const id = yield* waitForShell()
+            yield* Effect.sleep(Duration.millis(100))
+            yield* Fiber.interrupt(waiting)
+
+            expect((yield* shell.get(id)).status).toBe("exited")
+            expect((yield* shell.output(id)).output).toContain("steady")
+            yield* shell.remove(id)
+          }),
+        )
+      },
+      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]().then(() => undefined)),
+    ),
+  )
+
   it.live("returns the shell id for a background command", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),

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

@@ -47,7 +47,7 @@ const executionNode = makeGlobalNode({
       const completed = new Set<Session.ID>()
       const complete = Effect.fn("SubagentTest.complete")(function* (sessionID: Session.ID) {
         if (completed.has(sessionID)) return
-        if ((yield* store.get(sessionID))?.title?.includes("fail")) {
+        if ((yield* store.get(sessionID))?.title.includes("fail")) {
           yield* new SessionRunnerModel.ModelNotSelectedError({ sessionID })
           return
         }

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

@@ -3,7 +3,6 @@ import path from "path"
 import { describe, expect } from "bun:test"
 import { Effect, Layer } from "effect"
 import { FileMutation } from "@opencode-ai/core/file-mutation"
-import { Formatter } from "@opencode-ai/core/formatter"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { FSUtil } from "@opencode-ai/util/fs-util"
@@ -23,13 +22,12 @@ import { toolIdentity, executeTool, registerToolPlugin, toolDefinitions } from "
 const writeToolNode = makeLocationNode({
   name: "test/write-tool-plugin",
   layer: Layer.effectDiscard(registerToolPlugin(WriteTool.Plugin)),
-  deps: [Tool.node, LocationMutation.node, FileMutation.node, Formatter.node, FSUtil.node, Permission.node],
+  deps: [Tool.node, LocationMutation.node, FileMutation.node, Permission.node],
 })
 
 const sessionID = Session.ID.make("ses_write_tool_test")
 const assertions: Permission.AssertInput[] = []
 const writes: string[] = []
-let formatFile = (_target: string): Effect.Effect<boolean> => Effect.succeed(false)
 let denyAction: string | undefined
 
 const permission = Layer.succeed(
@@ -57,14 +55,9 @@ const permission = Layer.succeed(
   }),
 )
 
-const formatter = Layer.mock(Formatter.Service, {
-  file: (target) => formatFile(target),
-})
-
 const reset = () => {
   assertions.length = 0
   writes.length = 0
-  formatFile = () => Effect.succeed(false)
   denyAction = undefined
 }
 
@@ -100,7 +93,6 @@ const withTool = <A, E, R>(directory: string, body: (registry: Tool.Interface) =
         [
           [FSUtil.node, filesystem],
           [Location.node, activeLocation],
-          [Formatter.node, formatter],
           [Permission.node, permission],
         ],
       ),
@@ -140,17 +132,6 @@ describe("WriteTool", () => {
               "created",
             )
             expect(assertions).toMatchObject([{ sessionID, action: "edit", resources: ["src/new.txt"], save: ["*"] }])
-            expect(assertions[0]?.metadata).toMatchObject({
-              files: [
-                {
-                  file: "src/new.txt",
-                  status: "added",
-                  additions: 1,
-                  deletions: 0,
-                  patch: expect.stringContaining("+created"),
-                },
-              ],
-            })
             expect(writes).toEqual([path.join(yield* Effect.promise(() => fs.realpath(tmp.path)), "src", "new.txt")])
           }),
         )
@@ -159,30 +140,6 @@ describe("WriteTool", () => {
     ),
   )
 
-  it.live("formats the committed file", () =>
-    Effect.acquireUseRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => {
-        reset()
-        const target = path.join(tmp.path, "formatted.txt")
-        formatFile = (file) =>
-          Effect.promise(async () => {
-            await fs.writeFile(file, (await fs.readFile(file, "utf8")).toUpperCase())
-            return true
-          })
-        return withTool(tmp.path, (registry) =>
-          Effect.gen(function* () {
-            expect(yield* executeTool(registry, call({ path: "formatted.txt", content: "format me" }))).toMatchObject({
-              status: "completed",
-            })
-            expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("FORMAT ME")
-          }),
-        )
-      },
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-    ),
-  )
-
   it.live("overwrites a relative existing file and reports that it wrote the file", () =>
     Effect.acquireUseRelease(
       Effect.promise(() => tmpdir()),
@@ -198,17 +155,6 @@ describe("WriteTool", () => {
               if (settled.status !== "completed") return
               expect(settled.content).toEqual([{ type: "text", text: "Wrote file successfully: existing.txt" }])
               expect(settled.output).toMatchObject({ resource: "existing.txt", existed: true })
-              expect(assertions[0]?.metadata).toMatchObject({
-                files: [
-                  {
-                    file: "existing.txt",
-                    status: "modified",
-                    additions: 1,
-                    deletions: 1,
-                    patch: expect.stringMatching(/-before[\s\S]*\+after/),
-                  },
-                ],
-              })
               expect(yield* Effect.promise(() => fs.readFile(path.join(tmp.path, "existing.txt"), "utf8"))).toBe(
                 "after",
               )
@@ -228,11 +174,6 @@ describe("WriteTool", () => {
         reset()
         const preserved = path.join(tmp.path, "preserved.txt")
         const deduplicated = path.join(tmp.path, "deduplicated.txt")
-        formatFile = (target) =>
-          Effect.promise(async () => {
-            await fs.writeFile(target, `\uFEFF\uFEFF\uFEFF${(await fs.readFile(target, "utf8")).replace(/^\uFEFF+/, "")}`)
-            return true
-          })
         return Effect.promise(() =>
           Promise.all([fs.writeFile(preserved, "\uFEFFbefore"), fs.writeFile(deduplicated, "\uFEFFbefore")]),
         ).pipe(

packages/enterprise/src/routes/share/[shareID].tsx

@@ -158,11 +158,6 @@ export default function () {
           const match = createMemo(() => Binary.search(data().session, data().sessionID, (s) => s.id))
           if (!match().found) throw new Error(`Session ${data().sessionID} not found`)
           const info = createMemo(() => data().session[match().index])
-          const title = createMemo(
-            () =>
-              info().title ??
-              `${info().parentID ? "Child" : "New"} session - ${new Date(info().time.created).toISOString()}`,
-          )
           const ogImage = createMemo(() => {
             const models = new Set<string>()
             const messages = data().message[data().sessionID] ?? []
@@ -172,7 +167,7 @@ export default function () {
               }
             }
             const modelIDs = Array.from(models)
-            const encodedTitle = encodeURIComponent(Base64.encode(encodeURIComponent(title().substring(0, 700))))
+            const encodedTitle = encodeURIComponent(Base64.encode(encodeURIComponent(info().title.substring(0, 700))))
             let modelParam: string
             if (modelIDs.length === 1) {
               modelParam = modelIDs[0]
@@ -189,7 +184,9 @@ export default function () {
 
           return (
             <>
-              <Title>{title()} | OpenCode</Title>
+              <Show when={info().title}>
+                <Title>{info().title} | OpenCode</Title>
+              </Show>
               <Meta name="description" content="opencode - The AI coding agent built for the terminal." />
               <Meta property="og:image" content={ogImage()} />
               <Meta name="twitter:image" content={ogImage()} />
@@ -243,7 +240,7 @@ export default function () {
                               </div>
                             </div>
                           </div>
-                          <div class="text-left text-16-medium text-text-strong">{title()}</div>
+                          <div class="text-left text-16-medium text-text-strong">{info().title}</div>
                         </div>
                       )
 

packages/plugin/src/tui/context.ts

@@ -11,7 +11,6 @@ import type {
   OpenCodeEvent,
   PermissionSavedInfo,
   PermissionRequest,
-  Project,
   ProviderInfo,
   ReferenceInfo,
   SessionInfo,
@@ -78,10 +77,6 @@ export interface Data {
     }
   }
   readonly project: {
-    list(): Project[]
-    get(projectID: string): Project | undefined
-    sync(): Promise<void>
-    invalidate(): void
     readonly permission: {
       list(projectID: string): PermissionSavedInfo[] | undefined
       sync(projectID: string): Promise<void>
@@ -351,25 +346,6 @@ export interface UI {
     navigate(destination: Destination): void
     current(): Route
   }
-  readonly tabs: {
-    /** Returns whether session tabs are enabled for this TUI. */
-    enabled(): boolean
-    /** Returns the currently open root-session tabs. Reactive when read in a Solid computation. */
-    list(): readonly {
-      readonly sessionID: string
-      readonly title?: string
-      readonly active: boolean
-      readonly busy: boolean
-      readonly attention: boolean
-      readonly unread?: "activity" | "error"
-    }[]
-    /** Opens (or focuses) a tab for a session, adding it when not already open. Returns false when tabs are disabled. */
-    open(sessionID: string): boolean
-    /** Focuses an already-open tab and returns false when it is not open. */
-    focus(sessionID: string): boolean
-    /** Closes an open tab, or the active tab when omitted, and returns false when no tab matched. */
-    close(sessionID?: string): boolean
-  }
   readonly slot: <Name extends SlotName>(name: Name, render: Slot<Name>) => () => void
 }
 

packages/schema/src/location.ts

@@ -17,7 +17,6 @@ export class Info extends Schema.Class<Info>("Location.Info")({
   project: Schema.Struct({
     id: ProjectID,
     directory: AbsolutePath,
-    canonical: AbsolutePath,
   }),
 }) {}
 

packages/schema/src/project.ts

@@ -12,7 +12,6 @@ export const Vcs = Schema.Literals(["git", "hg"]).annotate({ identifier: "Projec
 export const Current = Schema.Struct({
   id: ID,
   directory: AbsolutePath,
-  canonical: AbsolutePath,
 }).annotate({ identifier: "Project.Current" })
 export interface Current extends Schema.Schema.Type<typeof Current> {}
 export const Directory = Schema.Struct({
@@ -47,7 +46,7 @@ export interface Time extends Schema.Schema.Type<typeof Time> {}
 
 export const Info = Schema.Struct({
   id: ID,
-  canonical: AbsolutePath,
+  worktree: Schema.String,
   vcs: optional(Vcs),
   name: optional(Schema.String),
   icon: optional(Icon),

packages/schema/src/session.ts

@@ -42,7 +42,7 @@ export const Info = Schema.Struct({
     updated: DateTimeUtcFromMillis,
     archived: DateTimeUtcFromMillis.pipe(optional),
   }),
-  title: Schema.String.pipe(optional),
+  title: Schema.String,
   location: Location.Ref,
   subpath: RelativePath.pipe(optional),
   revert: Revert.pipe(optional),

packages/schema/src/v1/session.ts

@@ -552,7 +552,7 @@ export const SessionInfo = Schema.Struct({
   cost: optional(Schema.Finite),
   tokens: optional(SessionTokens),
   share: optional(SessionShare),
-  title: optional(Schema.String),
+  title: Schema.String,
   agent: optional(Schema.String),
   model: optional(SessionModel),
   version: Schema.String,

packages/schema/test/contract-hygiene.test.ts

@@ -17,7 +17,7 @@ import { Money } from "../src/money.js"
 import { Skill } from "../src/skill.js"
 import { Shell } from "../src/shell.js"
 import { PersistedRevert } from "../src/session-revert.js"
-import { AbsolutePath, optional } from "../src/schema.js"
+import { optional } from "../src/schema.js"
 
 describe("contract hygiene", () => {
   test("restricts agent colors to six-digit hex values", () => {
@@ -52,18 +52,6 @@ describe("contract hygiene", () => {
         metadata: undefined,
       }),
     ).toEqual({ text: "completed" })
-
-    expect(
-      Schema.encodeSync(Session.Info)({
-        id: Session.ID.make("ses_untitled"),
-        projectID: Project.ID.make("global"),
-        cost: Money.USD.zero,
-        tokens: { input: 0, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
-        time: { created: DateTime.makeUnsafe(0), updated: DateTime.makeUnsafe(0) },
-        title: undefined,
-        location: { directory: AbsolutePath.make("/project") },
-      }),
-    ).not.toHaveProperty("title")
   })
 
   test("pending session items omit the internal admission sequence", () => {

packages/server/src/handlers/project.ts

@@ -9,11 +9,7 @@ export const ProjectHandler = HttpApiBuilder.group(Api, "server.project", (handl
     .handle("project.list", () => Project.Service.use((project) => project.list()))
     .handle("project.current", () =>
       Location.Service.use((location) =>
-        Effect.succeed({
-          id: location.project.id,
-          directory: location.project.directory,
-          canonical: location.project.canonical,
-        }),
+        Effect.succeed({ id: location.project.id, directory: location.project.directory }),
       ),
     )
     .handle("project.directories", (ctx) =>

packages/simulation/src/frontend/renderer.ts

@@ -41,7 +41,6 @@ export const create = Effect.fn("SimulationRenderer.create")(function* (
         ...options,
         width: cols,
         height: rows,
-        kittyKeyboard: Boolean(options.useKittyKeyboard),
         ...(recording
           ? {
               stdout: recording as unknown as NodeJS.WriteStream,

packages/simulation/test/actions.test.ts

@@ -43,25 +43,6 @@ test("normalizes named keys for OpenTUI", async () => {
   ])
 })
 
-test("headless input mirrors the configured kitty keyboard protocol", async () => {
-  await Effect.runPromise(
-    Effect.scoped(
-      Effect.gen(function* () {
-        const renderer = yield* SimulationRenderer.create({ useKittyKeyboard: {} })
-        const harness = createHarness(renderer)
-        let key: { readonly name: string; readonly source: string } | undefined
-        renderer.keyInput.once("keypress", (event) => {
-          key = event
-        })
-
-        yield* execute(harness, { type: "ui.press", key: "escape" })
-
-        expect(key).toMatchObject({ name: "escape", source: "kitty" })
-      }),
-    ),
-  )
-})
-
 test("clicks a target at relative coordinates through descendant text", async () => {
   await Effect.runPromise(
     Effect.scoped(

packages/tui/src/app.tsx

@@ -66,7 +66,6 @@ import { DialogThemeList } from "./component/dialog-theme-list"
 import { DialogHelp } from "./ui/dialog-help"
 import { DialogAgent } from "./component/dialog-agent"
 import { DialogSessionList } from "./component/dialog-session-list"
-import { DialogOpen } from "./component/dialog-open"
 import { SessionTabs } from "./component/session-tabs"
 import { ThemeErrorToast } from "./component/theme-error-toast"
 import { ThemeProvider, useTheme, useThemes } from "./context/theme"
@@ -95,15 +94,16 @@ import { StorageProvider } from "./context/storage"
 
 registerOpencodeSpinner()
 
-const appGlobalBindingCommands = ["session.list", "session.new", "open.menu"] as const
+const appGlobalBindingCommands = ["session.list", "session.new"] as const
 
 const sessionTabBindingCommands = [
   "session.tab.next",
   "session.tab.previous",
+  "session.tab.history.back",
+  "session.tab.history.forward",
   "session.tab.next_unread",
   "session.tab.previous_unread",
   "session.tab.close",
-  "session.tab.reopen",
   "session.tab.select.1",
   "session.tab.select.2",
   "session.tab.select.3",
@@ -326,17 +326,8 @@ export const run = Effect.fn("Tui.run")(function* (input: TuiInput) {
                             >
                               <TuiStartupProvider
                                 value={{
-                                  initialRoute: process.env.OPENCODE_STORY
-                                    ? {
-                                        type: "plugin",
-                                        id: "opencode.storybook",
-                                        name: "storybook",
-                                        // OPENCODE_STORY=1 opens the index; any other value opens that story.
-                                        data:
-                                          process.env.OPENCODE_STORY === "1"
-                                            ? undefined
-                                            : { story: process.env.OPENCODE_STORY },
-                                      }
+                                  initialRoute: process.env.OPENCODE_SCRAP
+                                    ? { type: "plugin", id: "scrap", name: "scrap" }
                                     : process.env.OPENCODE_ROUTE
                                       ? JSON.parse(process.env.OPENCODE_ROUTE)
                                       : undefined,
@@ -523,11 +514,8 @@ function App(props: { pair?: DialogPairCredentials }) {
     renderer.useMouse = config.data.mouse
   })
 
-  let active: { id: string; title?: string } | undefined
   // Update terminal window title based on current route and session
   createEffect(() => {
-    const session = route.data.type === "session" ? data.session.get(route.data.sessionID) : undefined
-    if (session) active = { id: session.id, title: session.title }
     if (!terminalTitleEnabled()) return
 
     if (route.data.type === "home") {
@@ -536,13 +524,14 @@ function App(props: { pair?: DialogPairCredentials }) {
     }
 
     if (route.data.type === "session") {
-      const title = session?.title
-      if (!title || isDefaultTitle(title)) {
+      const session = data.session.get(route.data.sessionID)
+      if (!session || isDefaultTitle(session.title)) {
         renderer.setTerminalTitle("OpenCode")
         return
       }
 
-      renderer.setTerminalTitle(`OC | ${title.length > 40 ? title.slice(0, 37) + "..." : title}`)
+      const title = session.title.length > 40 ? session.title.slice(0, 37) + "..." : session.title
+      renderer.setTerminalTitle(`OC | ${title}`)
       return
     }
 
@@ -646,20 +635,10 @@ function App(props: { pair?: DialogPairCredentials }) {
         run: () => {
           route.navigate({
             type: "home",
-            location: route.data.type === "session" ? data.session.get(route.data.sessionID)?.location : undefined,
           })
           dialog.clear()
         },
       },
-      {
-        name: "open.menu",
-        title: "Open session or project",
-        category: "Session",
-        slash: { name: "open", aliases: ["projects", "project"] },
-        run: () => {
-          dialog.replace(() => <DialogOpen />)
-        },
-      },
       ...Array.from({ length: 9 }, (_, i) => ({
         name: `session.quick_switch.${i + 1}`,
         title: `Switch to session in quick slot ${i + 1}`,
@@ -670,7 +649,7 @@ function App(props: { pair?: DialogPairCredentials }) {
       })),
       {
         name: "session.tab.next",
-        title: "Next tab",
+        title: "Next open session tab",
         category: "Session",
         palette: undefined,
         enabled: sessionTabs.enabled,
@@ -678,15 +657,31 @@ function App(props: { pair?: DialogPairCredentials }) {
       },
       {
         name: "session.tab.previous",
-        title: "Previous tab",
+        title: "Previous open session tab",
         category: "Session",
         palette: undefined,
         enabled: sessionTabs.enabled,
         run: () => sessionTabs.cycle(-1),
       },
+      {
+        name: "session.tab.history.back",
+        title: "Back in session tab history",
+        category: "Session",
+        palette: undefined,
+        enabled: sessionTabs.enabled,
+        run: () => sessionTabs.history(-1),
+      },
+      {
+        name: "session.tab.history.forward",
+        title: "Forward in session tab history",
+        category: "Session",
+        palette: undefined,
+        enabled: sessionTabs.enabled,
+        run: () => sessionTabs.history(1),
+      },
       {
         name: "session.tab.next_unread",
-        title: "Next unread tab",
+        title: "Next unread session tab",
         category: "Session",
         palette: undefined,
         enabled: sessionTabs.enabled,
@@ -694,7 +689,7 @@ function App(props: { pair?: DialogPairCredentials }) {
       },
       {
         name: "session.tab.previous_unread",
-        title: "Previous unread tab",
+        title: "Previous unread session tab",
         category: "Session",
         palette: undefined,
         enabled: sessionTabs.enabled,
@@ -702,21 +697,14 @@ function App(props: { pair?: DialogPairCredentials }) {
       },
       {
         name: "session.tab.close",
-        title: "Close tab",
+        title: "Close current session tab",
         category: "Session",
         enabled: sessionTabs.enabled,
         run: () => sessionTabs.close(),
       },
-      {
-        name: "session.tab.reopen",
-        title: "Reopen closed tab",
-        category: "Session",
-        enabled: sessionTabs.enabled,
-        run: () => sessionTabs.reopen(),
-      },
       ...Array.from({ length: 9 }, (_, i) => ({
         name: `session.tab.select.${i + 1}`,
-        title: `Switch to tab ${i + 1}`,
+        title: `Switch to session tab ${i + 1}`,
         category: "Session",
         palette: undefined,
         enabled: sessionTabs.enabled,
@@ -1145,11 +1133,10 @@ function App(props: { pair?: DialogPairCredentials }) {
 
   event.on("session.deleted", (evt) => {
     if (route.data.type === "session" && route.data.sessionID === evt.data.sessionID) {
-      const title = active?.id === evt.data.sessionID ? active.title : undefined
       route.navigate({ type: "home" })
       toast.show({
         variant: "info",
-        message: title ? `Session "${title}" was deleted` : "The current session was deleted",
+        message: "The current session was deleted",
       })
     }
   })
@@ -1213,13 +1200,7 @@ function App(props: { pair?: DialogPairCredentials }) {
         <box flexGrow={1} minWidth={0} flexDirection="column">
           <Show when={plugins.ready()}>
             <box flexGrow={1} minHeight={0} flexDirection="column">
-              <Show
-                when={
-                  sessionTabs.enabled() &&
-                  (sessionTabs.tabs().length > 0 || sessionTabs.newTab()) &&
-                  route.data.type !== "plugin"
-                }
-              >
+              <Show when={sessionTabs.enabled() && sessionTabs.tabs().length > 0 && route.data.type !== "plugin"}>
                 <SessionTabs />
               </Show>
               <Switch>

packages/tui/src/component/bg-pulse-render.ts

@@ -0,0 +1,436 @@
+import { OptimizedBuffer, RGBA, TextAttributes } from "@opentui/core"
+import { go } from "../logo"
+
+const PERIOD = 4600
+const RINGS = 3
+const WIDTH = 3.8
+const TAIL = 9.5
+const AMP = 0.55
+const TAIL_AMP = 0.16
+const BREATH_AMP = 0.05
+const BREATH_SPEED = 0.0008
+// Offset so the bg ring emits from the estimated GO center when the logo shimmer peaks.
+const PHASE_OFFSET = 0.29
+const LOGO_GAP = 1
+const LOGO_TOP_BIAS = -1
+const LOGO_LEFT_WIDTH = go.left[0]?.length ?? 0
+const LOGO_LINES = go.left.map((line, index) => line + " ".repeat(LOGO_GAP) + go.right[index])
+const LOGO_WIDTH = LOGO_LINES[0]?.length ?? 0
+const LOGO_HEIGHT = LOGO_LINES.length
+const SPACE = " ".codePointAt(0)!
+const TOP_HALF = "▀".codePointAt(0)!
+const FULL_BLOCK = "█".codePointAt(0)!
+const RING_SCALE = 1 / RINGS
+const TAIL_SCALE = 1 / TAIL
+const LOGO_REACH = Math.hypot(LOGO_WIDTH, LOGO_HEIGHT * 2) + 3
+
+const enum LogoCellKind {
+  Background,
+  Top,
+  ShadowTop,
+  Solid,
+  Char,
+}
+
+type LogoTemplateCell = {
+  x: number
+  y: number
+  kind: LogoCellKind
+  charCode: number
+  attributes: number
+  topDist: number
+  bottomDist: number
+}
+
+const LOGO_TEMPLATE: LogoTemplateCell[] = LOGO_LINES.flatMap((line, y) =>
+  Array.from(line)
+    .map((char, x) => {
+      if (char === " ") return
+      const kind =
+        char === "_"
+          ? LogoCellKind.Background
+          : char === "^"
+            ? LogoCellKind.Top
+            : char === "~"
+              ? LogoCellKind.ShadowTop
+              : char === "█"
+                ? LogoCellKind.Solid
+                : LogoCellKind.Char
+      return {
+        x,
+        y,
+        kind,
+        charCode: char.codePointAt(0) ?? SPACE,
+        attributes: x > LOGO_LEFT_WIDTH ? TextAttributes.BOLD : 0,
+        topDist: Math.hypot(x + 0.5 - LOGO_WIDTH / 2, y * 2 - LOGO_HEIGHT),
+        bottomDist: Math.hypot(x + 0.5 - LOGO_WIDTH / 2, y * 2 + 1 - LOGO_HEIGHT),
+      }
+    })
+    .filter((cell): cell is LogoTemplateCell => !!cell),
+)
+
+export type Rgb = [number, number, number]
+
+export type GoUpsellArtRenderOptions = {
+  deltaTime?: number
+  rgb?: boolean
+  cache?: boolean
+}
+
+const CACHE_FRAME_COUNT = Math.round(PERIOD / (1000 / 30))
+const CACHE_FRAMES_PER_RENDER = 1
+
+export function toRgb(color: RGBA): Rgb {
+  const [r, g, b] = color.toInts()
+  return [r, g, b]
+}
+
+function clamp(n: number) {
+  return Math.max(0, Math.min(1, n))
+}
+
+function writeRgb(buffer: Uint16Array, offset: number, r: number, g: number, b: number, a = 255) {
+  buffer[offset] = r
+  buffer[offset + 1] = g
+  buffer[offset + 2] = b
+  buffer[offset + 3] = a
+}
+
+function mixChannel(base: number, overlay: number, alpha: number) {
+  return Math.round(base + (overlay - base) * clamp(alpha))
+}
+
+function writeLogoTint(
+  buffer: Uint16Array,
+  offset: number,
+  base: Rgb,
+  primary: Rgb,
+  primaryMix: number,
+  peakMix: number,
+) {
+  const p = clamp(primaryMix)
+  const q = clamp(peakMix)
+  const r = mixChannel(mixChannel(base[0], primary[0], p), 255, q)
+  const g = mixChannel(mixChannel(base[1], primary[1], p), 255, q)
+  const b = mixChannel(mixChannel(base[2], primary[2], p), 255, q)
+  writeRgb(buffer, offset, r, g, b)
+}
+
+function sameRgb(a: Rgb, b: Rgb) {
+  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2]
+}
+
+export class GoUpsellArtPainter {
+  private panelRgb: Rgb = [0, 0, 0]
+  private primaryRgb: Rgb = [255, 255, 255]
+  private logoBaseRgb: Rgb = [180, 180, 180]
+  private elapsed = 0
+  private distances = new Float32Array(0)
+  private edgeFalloff = new Float32Array(0)
+  private geometryWidth = 0
+  private geometryHeight = 0
+  private reach = 1
+  private logoX = 0
+  private logoY = 0
+  private logoIndexes = new Int32Array(0)
+  private logoRgb: boolean | undefined
+  private pulsePeak = 0
+  private pulsePrimary = 0
+  private cacheDirty = true
+  private frameCache: Array<{ fg: Uint16Array; bg: Uint16Array }> = []
+  private cacheBuildIndex = 0
+
+  setBackgroundPanel(value: RGBA | Rgb | undefined) {
+    if (!value) return false
+    const next = value instanceof RGBA ? toRgb(value) : value
+    if (sameRgb(this.panelRgb, next)) return false
+    this.panelRgb = next
+    this.invalidateCache()
+    return true
+  }
+
+  setLogoBase(value: RGBA | Rgb | undefined) {
+    if (!value) return false
+    const next = value instanceof RGBA ? toRgb(value) : value
+    if (sameRgb(this.logoBaseRgb, next)) return false
+    this.logoBaseRgb = next
+    this.invalidateCache()
+    return true
+  }
+
+  setPrimary(value: RGBA | Rgb | undefined) {
+    if (!value) return false
+    const next = value instanceof RGBA ? toRgb(value) : value
+    if (sameRgb(this.primaryRgb, next)) return false
+    this.primaryRgb = next
+    this.invalidateCache()
+    return true
+  }
+
+  render(frameBuffer: OptimizedBuffer, options: GoUpsellArtRenderOptions = {}) {
+    const rgb = options.rgb === true
+    this.elapsed = (this.elapsed + (options.deltaTime ?? 0)) % PERIOD
+    this.rebuildGeometry(frameBuffer, rgb)
+    if (options.cache !== false) {
+      this.drawCached(frameBuffer, rgb)
+      return
+    }
+    this.drawBackground(frameBuffer, this.elapsed)
+    this.drawLogo(frameBuffer, this.elapsed, rgb)
+  }
+
+  private invalidateCache() {
+    this.cacheDirty = true
+    this.cacheBuildIndex = 0
+    this.frameCache = []
+  }
+
+  private rebuildGeometry(frameBuffer: OptimizedBuffer, rgb: boolean) {
+    const width = frameBuffer.width
+    const height = frameBuffer.height
+    const geometryChanged = width !== this.geometryWidth || height !== this.geometryHeight
+    const logoTemplateChanged = this.logoRgb !== rgb
+    if (!geometryChanged && !logoTemplateChanged) return
+
+    if (geometryChanged) {
+      this.geometryWidth = width
+      this.geometryHeight = height
+      this.logoX = Math.max(0, Math.floor((width - LOGO_WIDTH) / 2))
+      this.logoY = Math.max(
+        0,
+        Math.min(Math.max(0, height - LOGO_HEIGHT), Math.round((height - LOGO_HEIGHT) / 2) + LOGO_TOP_BIAS),
+      )
+
+      const centerX = this.logoX + LOGO_WIDTH / 2
+      const centerY = this.logoY + LOGO_HEIGHT / 2
+      this.reach = Math.hypot(Math.max(centerX, width - centerX), Math.max(centerY, height - centerY) * 2) + TAIL
+      this.distances = new Float32Array(width * height)
+      this.edgeFalloff = new Float32Array(width * height)
+
+      for (let y = 0; y < height; y++) {
+        for (let x = 0; x < width; x++) {
+          const index = y * width + x
+          const dist = Math.hypot(x + 0.5 - centerX, (y + 0.5 - centerY) * 2)
+          this.distances[index] = dist
+          this.edgeFalloff[index] = Math.max(0, 1 - (dist / (this.reach * 0.85)) ** 2)
+        }
+      }
+    }
+
+    this.logoRgb = rgb
+    this.invalidateCache()
+    this.rebuildCellTemplate(frameBuffer, rgb)
+  }
+
+  private drawCached(frameBuffer: OptimizedBuffer, rgb: boolean) {
+    if (this.cacheDirty) this.startFrameCache(frameBuffer, rgb)
+    if (this.cacheBuildIndex < CACHE_FRAME_COUNT) {
+      this.buildFrameCache(frameBuffer, rgb)
+      this.drawBackground(frameBuffer, this.elapsed)
+      this.drawLogo(frameBuffer, this.elapsed, rgb)
+      return
+    }
+
+    const frame = this.frameCache[Math.floor((this.elapsed / PERIOD) * CACHE_FRAME_COUNT) % CACHE_FRAME_COUNT]
+    if (frame) {
+      frameBuffer.buffers.fg.set(frame.fg)
+      frameBuffer.buffers.bg.set(frame.bg)
+    }
+  }
+
+  private startFrameCache(frameBuffer: OptimizedBuffer, rgb: boolean) {
+    this.frameCache = []
+    this.cacheBuildIndex = 0
+    this.rebuildCellTemplate(frameBuffer, rgb)
+    this.cacheDirty = false
+  }
+
+  private buildFrameCache(frameBuffer: OptimizedBuffer, rgb: boolean) {
+    const end = Math.min(CACHE_FRAME_COUNT, this.cacheBuildIndex + CACHE_FRAMES_PER_RENDER)
+    for (; this.cacheBuildIndex < end; this.cacheBuildIndex++) {
+      const t = (this.cacheBuildIndex / CACHE_FRAME_COUNT) * PERIOD
+      this.drawBackground(frameBuffer, t)
+      this.drawLogo(frameBuffer, t, rgb)
+      this.frameCache.push({
+        fg: new Uint16Array(frameBuffer.buffers.fg),
+        bg: new Uint16Array(frameBuffer.buffers.bg),
+      })
+    }
+  }
+
+  private rebuildCellTemplate(frameBuffer: OptimizedBuffer, rgb: boolean) {
+    const buffers = frameBuffer.buffers
+    buffers.char.fill(SPACE)
+    buffers.attributes.fill(0)
+
+    if (this.geometryWidth < LOGO_WIDTH || this.geometryHeight < LOGO_HEIGHT) {
+      this.logoIndexes = new Int32Array(0)
+      return
+    }
+
+    this.logoIndexes = new Int32Array(LOGO_TEMPLATE.length)
+    for (let i = 0; i < LOGO_TEMPLATE.length; i++) {
+      const cell = LOGO_TEMPLATE[i]!
+      const index = (this.logoY + cell.y) * this.geometryWidth + this.logoX + cell.x
+      this.logoIndexes[i] = index
+      buffers.attributes[index] = cell.attributes
+      buffers.char[index] =
+        cell.kind === LogoCellKind.Background
+          ? SPACE
+          : cell.kind === LogoCellKind.Top || cell.kind === LogoCellKind.ShadowTop
+            ? TOP_HALF
+            : cell.kind === LogoCellKind.Solid
+              ? rgb
+                ? TOP_HALF
+                : FULL_BLOCK
+              : cell.charCode
+    }
+  }
+
+  private drawBackground(frameBuffer: OptimizedBuffer, t: number) {
+    const buffers = frameBuffer.buffers
+    const fg = buffers.fg
+    const bg = buffers.bg
+    const distances = this.distances
+    const edgeFalloff = this.edgeFalloff
+    const baseR = this.panelRgb[0]
+    const baseG = this.panelRgb[1]
+    const baseB = this.panelRgb[2]
+    const deltaR = this.primaryRgb[0] - baseR
+    const deltaG = this.primaryRgb[1] - baseG
+    const deltaB = this.primaryRgb[2] - baseB
+    const breath = (0.5 + 0.5 * Math.sin(t * BREATH_SPEED)) * BREATH_AMP
+
+    const phase0 = (t / PERIOD - PHASE_OFFSET + 1) % 1
+    const phase1 = (t / PERIOD + 1 / RINGS - PHASE_OFFSET + 1) % 1
+    const phase2 = (t / PERIOD + 2 / RINGS - PHASE_OFFSET + 1) % 1
+    const envelope0 = Math.sin(phase0 * Math.PI)
+    const envelope1 = Math.sin(phase1 * Math.PI)
+    const envelope2 = Math.sin(phase2 * Math.PI)
+    const eased0 = envelope0 * envelope0 * (3 - 2 * envelope0)
+    const eased1 = envelope1 * envelope1 * (3 - 2 * envelope1)
+    const eased2 = envelope2 * envelope2 * (3 - 2 * envelope2)
+    const head0 = phase0 * this.reach
+    const head1 = phase1 * this.reach
+    const head2 = phase2 * this.reach
+
+    for (let index = 0; index < distances.length; index++) {
+      const dist = distances[index]
+      const delta0 = dist - head0
+      const abs0 = delta0 < 0 ? -delta0 : delta0
+      const crest0 = abs0 < WIDTH ? 0.5 + 0.5 * Math.cos((delta0 / WIDTH) * Math.PI) : 0
+      const tail0 = delta0 < 0 && delta0 > -TAIL ? (1 + delta0 * TAIL_SCALE) ** 2.3 : 0
+
+      const delta1 = dist - head1
+      const abs1 = delta1 < 0 ? -delta1 : delta1
+      const crest1 = abs1 < WIDTH ? 0.5 + 0.5 * Math.cos((delta1 / WIDTH) * Math.PI) : 0
+      const tail1 = delta1 < 0 && delta1 > -TAIL ? (1 + delta1 * TAIL_SCALE) ** 2.3 : 0
+
+      const delta2 = dist - head2
+      const abs2 = delta2 < 0 ? -delta2 : delta2
+      const crest2 = abs2 < WIDTH ? 0.5 + 0.5 * Math.cos((delta2 / WIDTH) * Math.PI) : 0
+      const tail2 = delta2 < 0 && delta2 > -TAIL ? (1 + delta2 * TAIL_SCALE) ** 2.3 : 0
+
+      const level =
+        (crest0 * AMP + tail0 * TAIL_AMP) * eased0 +
+        (crest1 * AMP + tail1 * TAIL_AMP) * eased1 +
+        (crest2 * AMP + tail2 * TAIL_AMP) * eased2
+      const rawStrength = (level * RING_SCALE + breath) * edgeFalloff[index]
+      const strength = (rawStrength > 1 ? 1 : rawStrength) * 0.7
+      const offset = index * 4
+      const r = Math.round(baseR + deltaR * strength)
+      const g = Math.round(baseG + deltaG * strength)
+      const b = Math.round(baseB + deltaB * strength)
+      bg[offset] = fg[offset] = r
+      bg[offset + 1] = fg[offset + 1] = g
+      bg[offset + 2] = fg[offset + 2] = b
+      bg[offset + 3] = fg[offset + 3] = 255
+    }
+  }
+
+  private setLogoPulse(dist: number, head0: number, eased0: number, head1: number, eased1: number) {
+    let peak = 0.04
+    let primary = 0
+
+    const delta0 = dist - head0
+    const core0 = Math.exp(-(Math.abs(delta0 / 1.2) ** 1.8))
+    const soft0 = Math.exp(-(Math.abs(delta0 / 7) ** 1.6))
+    const tail0 = delta0 < 0 && delta0 > -7 ? (1 + delta0 / 7) ** 2.6 : 0
+    peak += core0 * 0.65 * eased0
+    primary += (soft0 * 0.16 + tail0 * 0.22) * eased0
+
+    const delta1 = dist - head1
+    const core1 = Math.exp(-(Math.abs(delta1 / 1.2) ** 1.8))
+    const soft1 = Math.exp(-(Math.abs(delta1 / 7) ** 1.6))
+    const tail1 = delta1 < 0 && delta1 > -7 ? (1 + delta1 / 7) ** 2.6 : 0
+    peak += core1 * 0.65 * eased1
+    primary += (soft1 * 0.16 + tail1 * 0.22) * eased1
+
+    this.pulsePeak = peak > 1 ? 1 : peak
+    this.pulsePrimary = primary > 1 ? 1 : primary
+  }
+
+  private drawLogo(frameBuffer: OptimizedBuffer, t: number, rgb: boolean) {
+    if (this.logoIndexes.length === 0) return
+
+    const buffers = frameBuffer.buffers
+    const fg = buffers.fg
+    const bg = buffers.bg
+    const shadow: Rgb = [
+      mixChannel(this.panelRgb[0], this.logoBaseRgb[0], 0.25),
+      mixChannel(this.panelRgb[1], this.logoBaseRgb[1], 0.25),
+      mixChannel(this.panelRgb[2], this.logoBaseRgb[2], 0.25),
+    ]
+    const phase0 = (t / PERIOD) % 1
+    const phase1 = (t / PERIOD + 0.5) % 1
+    const envelope0 = Math.sin(phase0 * Math.PI)
+    const envelope1 = Math.sin(phase1 * Math.PI)
+    const eased0 = envelope0 * envelope0 * (3 - 2 * envelope0)
+    const eased1 = envelope1 * envelope1 * (3 - 2 * envelope1)
+    const head0 = phase0 * LOGO_REACH
+    const head1 = phase1 * LOGO_REACH
+
+    for (let i = 0; i < LOGO_TEMPLATE.length; i++) {
+      const cell = LOGO_TEMPLATE[i]!
+      const index = this.logoIndexes[i]!
+      const offset = index * 4
+      this.setLogoPulse(cell.topDist, head0, eased0, head1, eased1)
+      const topPeak = this.pulsePeak
+      const topPrimary = this.pulsePrimary
+      this.setLogoPulse(cell.bottomDist, head0, eased0, head1, eased1)
+      const bottomPeak = this.pulsePeak
+      const bottomPrimary = this.pulsePrimary
+
+      if (cell.kind === LogoCellKind.Background) {
+        writeLogoTint(bg, offset, shadow, this.primaryRgb, 0, Math.max(topPeak, bottomPeak) * 0.18)
+        continue
+      }
+
+      if (cell.kind === LogoCellKind.Top) {
+        writeLogoTint(fg, offset, this.logoBaseRgb, this.primaryRgb, topPrimary, topPeak)
+        writeLogoTint(bg, offset, shadow, this.primaryRgb, 0, bottomPeak * 0.18)
+        continue
+      }
+
+      if (cell.kind === LogoCellKind.ShadowTop) {
+        writeLogoTint(fg, offset, shadow, this.primaryRgb, 0, topPeak * 0.18)
+        continue
+      }
+
+      if (cell.kind === LogoCellKind.Solid && rgb) {
+        writeLogoTint(fg, offset, this.logoBaseRgb, this.primaryRgb, topPrimary, topPeak)
+        writeLogoTint(bg, offset, this.logoBaseRgb, this.primaryRgb, bottomPrimary, bottomPeak)
+        continue
+      }
+
+      writeLogoTint(
+        fg,
+        offset,
+        this.logoBaseRgb,
+        this.primaryRgb,
+        (topPrimary + bottomPrimary) / 2,
+        (topPeak + bottomPeak) / 2,
+      )
+    }
+  }
+}

packages/tui/src/component/bg-pulse.tsx

@@ -0,0 +1,102 @@
+import {
+  FrameBufferRenderable,
+  RGBA,
+  type OptimizedBuffer,
+  type RenderContext,
+  type RenderableOptions,
+} from "@opentui/core"
+import { extend, useRenderer } from "@opentui/solid"
+import { onCleanup, onMount } from "solid-js"
+import { useTheme, useThemes } from "../context/theme"
+import { tint } from "../theme/color"
+import { GoUpsellArtPainter } from "./bg-pulse-render"
+
+type GoUpsellArtOptions = RenderableOptions<FrameBufferRenderable> & {
+  backgroundPanel?: RGBA
+  primary?: RGBA
+  logoBase?: RGBA
+}
+
+class GoUpsellArtRenderable extends FrameBufferRenderable {
+  private painter = new GoUpsellArtPainter()
+
+  constructor(ctx: RenderContext, options: GoUpsellArtOptions = {}) {
+    const width = typeof options.width === "number" ? options.width : 1
+    const height = typeof options.height === "number" ? options.height : 1
+    super(ctx, {
+      ...options,
+      width,
+      height,
+      live: options.live ?? true,
+      respectAlpha: false,
+    })
+
+    if (options.width !== undefined && typeof options.width !== "number") this.width = options.width
+    if (options.height !== undefined && typeof options.height !== "number") this.height = options.height
+    this.painter.setBackgroundPanel(options.backgroundPanel)
+    this.painter.setPrimary(options.primary)
+    this.painter.setLogoBase(options.logoBase)
+  }
+
+  set backgroundPanel(value: RGBA | undefined) {
+    if (this.painter.setBackgroundPanel(value)) this.requestRender()
+  }
+
+  set logoBase(value: RGBA | undefined) {
+    if (this.painter.setLogoBase(value)) this.requestRender()
+  }
+
+  set primary(value: RGBA | undefined) {
+    if (this.painter.setPrimary(value)) this.requestRender()
+  }
+
+  protected override renderSelf(buffer: OptimizedBuffer, deltaTime = 0): void {
+    if (!this.visible || this.isDestroyed) return
+
+    this.painter.render(this.frameBuffer, {
+      deltaTime,
+      rgb: this._ctx.capabilities?.rgb === true,
+    })
+    super.renderSelf(buffer)
+  }
+}
+
+declare module "@opentui/solid" {
+  interface OpenTUIComponents {
+    go_upsell_art: typeof GoUpsellArtRenderable
+  }
+}
+
+extend({ go_upsell_art: GoUpsellArtRenderable })
+
+export function BgPulse() {
+  const themes = useThemes()
+  const theme = useTheme("elevated")
+  const mode = themes.mode
+  const renderer = useRenderer()
+  let targetFps = renderer.targetFps
+  let maxFps = renderer.maxFps
+
+  onMount(() => {
+    targetFps = renderer.targetFps
+    maxFps = renderer.maxFps
+    renderer.targetFps = 30
+    renderer.maxFps = 30
+  })
+
+  onCleanup(() => {
+    renderer.targetFps = targetFps
+    renderer.maxFps = maxFps
+  })
+
+  return (
+    <go_upsell_art
+      width="100%"
+      height="100%"
+      backgroundPanel={theme.background.default}
+      primary={theme.hue.interactive[mode() === "light" ? 800 : 200]}
+      logoBase={tint(theme.background.default, theme.text.default, 0.62)}
+      live
+    />
+  )
+}