Merge branch 'dev' into kit/effectify-plugin

Replace the legacy Instance.state() lazy-init pattern with the standard
Effect service pattern (Interface, Service class, Layer, promise facades).
Register Plugin.Service in InstanceServices and add its layer to the
instance lookup.

packages/opencode/specs/effect-migration.md

@@ -126,10 +126,10 @@ Done now:
 
 Still open and likely worth migrating:
 
-- [ ] `Plugin`
+- [x] `Plugin`
 - [ ] `ToolRegistry`
 - [ ] `Pty`
-- [x] `Worktree`
+- [ ] `Worktree`
 - [ ] `Installation`
 - [ ] `Bus`
 - [ ] `Command`

packages/opencode/src/bus/bus-event.ts

@@ -1,5 +1,5 @@
 import z from "zod"
-import type { ZodType } from "zod"
+import type { ZodObject, ZodRawShape } from "zod"
 import { Log } from "../util/log"
 
 export namespace BusEvent {
@@ -9,7 +9,7 @@ export namespace BusEvent {
 
   const registry = new Map<string, Definition>()
 
-  export function define<Type extends string, Properties extends ZodType>(type: Type, properties: Properties) {
+  export function define<Type extends string, Properties extends ZodObject<ZodRawShape>>(type: Type, properties: Properties) {
     const result = {
       type,
       properties,

packages/opencode/src/bus/global.ts

@@ -4,7 +4,7 @@ export const GlobalBus = new EventEmitter<{
   event: [
     {
       directory?: string
-      payload: any
+      payload: { type: string; properties: Record<string, unknown> }
     },
   ]
 }>()

packages/opencode/src/control-plane/workspace.ts

@@ -124,7 +124,7 @@ export namespace Workspace {
       await parseSSE(res.body, stop, (event) => {
         GlobalBus.emit("event", {
           directory: space.id,
-          payload: event,
+          payload: event as { type: string; properties: Record<string, unknown> },
         })
       })
       // Wait 250ms and retry if SSE connection fails

packages/opencode/src/effect/instances.ts

@@ -10,7 +10,7 @@ import { ProviderAuth } from "@/provider/auth-service"
 import { Question } from "@/question/service"
 import { Skill } from "@/skill/service"
 import { Snapshot } from "@/snapshot/service"
-import { Worktree } from "@/worktree"
+import { Plugin } from "@/plugin"
 import { InstanceContext } from "./instance-context"
 import { registerDisposer } from "./instance-registry"
 
@@ -27,7 +27,7 @@ export type InstanceServices =
   | File.Service
   | Skill.Service
   | Snapshot.Service
-  | Worktree.Service
+  | Plugin.Service
 
 // NOTE: LayerMap only passes the key (directory string) to lookup, but we need
 // the full instance context (directory, worktree, project). We read from the
@@ -48,7 +48,7 @@ function lookup(_key: string) {
     File.layer,
     Skill.defaultLayer,
     Snapshot.defaultLayer,
-    Worktree.layer,
+    Plugin.layer,
   ).pipe(Layer.provide(ctx))
 }
 

packages/opencode/src/plugin/index.ts

@@ -1,144 +1,206 @@
 import type { Hooks, PluginInput, Plugin as PluginInstance } from "@opencode-ai/plugin"
-import { Config } from "../config/config"
 import { Bus } from "../bus"
 import { Log } from "../util/log"
 import { createOpencodeClient } from "@opencode-ai/sdk"
-import { Server } from "../server/server"
 import { BunProc } from "../bun"
-import { Instance } from "../project/instance"
 import { Flag } from "../flag/flag"
-import { CodexAuthPlugin } from "./codex"
-import { Session } from "../session"
 import { NamedError } from "@opencode-ai/util/error"
-import { CopilotAuthPlugin } from "./copilot"
-import { gitlabAuthPlugin as GitlabAuthPlugin } from "opencode-gitlab-auth"
+import { Effect, Layer, ServiceMap } from "effect"
+import { InstanceContext } from "@/effect/instance-context"
 
 export namespace Plugin {
   const log = Log.create({ service: "plugin" })
 
-  // Built-in plugins that are directly imported (not installed from npm)
-  const INTERNAL_PLUGINS: PluginInstance[] = [CodexAuthPlugin, CopilotAuthPlugin, GitlabAuthPlugin]
+  export interface Interface {
+    readonly trigger: <
+      Name extends Exclude<keyof Required<Hooks>, "auth" | "event" | "tool">,
+      Input = Parameters<Required<Hooks>[Name]>[0],
+      Output = Parameters<Required<Hooks>[Name]>[1],
+    >(
+      name: Name,
+      input: Input,
+      output: Output,
+    ) => Effect.Effect<Output>
+    readonly list: () => Effect.Effect<Hooks[]>
+    readonly init: () => Effect.Effect<void>
+  }
 
-  const state = Instance.state(async () => {
-    const client = createOpencodeClient({
-      baseUrl: "http://localhost:4096",
-      directory: Instance.directory,
-      headers: Flag.OPENCODE_SERVER_PASSWORD
-        ? {
-            Authorization: `Basic ${Buffer.from(`${Flag.OPENCODE_SERVER_USERNAME ?? "opencode"}:${Flag.OPENCODE_SERVER_PASSWORD}`).toString("base64")}`,
+  export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Plugin") {}
+
+  export const layer = Layer.effect(
+    Service,
+    Effect.gen(function* () {
+      const instance = yield* InstanceContext
+      const hooks: Hooks[] = []
+      let task: Promise<void> | undefined
+
+      const load = Effect.fn("Plugin.load")(function* () {
+        yield* Effect.promise(async () => {
+          const [{ Config }, { Server }, codex, copilot, gitlab] = await Promise.all([
+            import("../config/config"),
+            import("../server/server"),
+            import("./codex"),
+            import("./copilot"),
+            import("opencode-gitlab-auth"),
+          ])
+          const internal: PluginInstance[] = [codex.CodexAuthPlugin, copilot.CopilotAuthPlugin, gitlab.gitlabAuthPlugin]
+          const client = createOpencodeClient({
+            baseUrl: "http://localhost:4096",
+            directory: instance.directory,
+            headers: Flag.OPENCODE_SERVER_PASSWORD
+              ? {
+                  Authorization: `Basic ${Buffer.from(`${Flag.OPENCODE_SERVER_USERNAME ?? "opencode"}:${Flag.OPENCODE_SERVER_PASSWORD}`).toString("base64")}`,
+                }
+              : undefined,
+            fetch: async (...args) => Server.Default().fetch(...args),
+          })
+          const config = await Config.get()
+          const input: PluginInput = {
+            client,
+            project: instance.project,
+            worktree: instance.worktree,
+            directory: instance.directory,
+            get serverUrl(): URL {
+              return Server.url ?? new URL("http://localhost:4096")
+            },
+            $: Bun.$,
           }
-        : undefined,
-      fetch: async (...args) => Server.Default().fetch(...args),
-    })
-    const config = await Config.get()
-    const hooks: Hooks[] = []
-    const input: PluginInput = {
-      client,
-      project: Instance.project,
-      worktree: Instance.worktree,
-      directory: Instance.directory,
-      get serverUrl(): URL {
-        return Server.url ?? new URL("http://localhost:4096")
-      },
-      $: Bun.$,
-    }
 
-    for (const plugin of INTERNAL_PLUGINS) {
-      log.info("loading internal plugin", { name: plugin.name })
-      const init = await plugin(input).catch((err) => {
-        log.error("failed to load internal plugin", { name: plugin.name, error: err })
+          for (const plugin of internal) {
+            log.info("loading internal plugin", { name: plugin.name })
+            const init = await plugin(input).catch((err) => {
+              log.error("failed to load internal plugin", { name: plugin.name, error: err })
+            })
+            if (init) hooks.push(init)
+          }
+
+          let plugins = config.plugin ?? []
+          if (plugins.length) await Config.waitForDependencies()
+
+          for (let plugin of plugins) {
+            // ignore old codex plugin since it is supported first party now
+            if (plugin.includes("opencode-openai-codex-auth") || plugin.includes("opencode-copilot-auth")) continue
+            log.info("loading plugin", { path: plugin })
+            if (!plugin.startsWith("file://")) {
+              const lastAtIndex = plugin.lastIndexOf("@")
+              const pkg = lastAtIndex > 0 ? plugin.substring(0, lastAtIndex) : plugin
+              const version = lastAtIndex > 0 ? plugin.substring(lastAtIndex + 1) : "latest"
+              plugin = await BunProc.install(pkg, version).catch((err) => {
+                const cause = err instanceof Error ? err.cause : err
+                const detail = cause instanceof Error ? cause.message : String(cause ?? err)
+                log.error("failed to install plugin", { pkg, version, error: detail })
+                void import("../session").then(({ Session }) =>
+                  Bus.publish(Session.Event.Error, {
+                    error: new NamedError.Unknown({
+                      message: `Failed to install plugin ${pkg}@${version}: ${detail}`,
+                    }).toObject(),
+                  }),
+                )
+                return ""
+              })
+              if (!plugin) continue
+            }
+            // Prevent duplicate initialization when plugins export the same function
+            // as both a named export and default export (e.g., `export const X` and `export default X`).
+            // Object.entries(mod) would return both entries pointing to the same function reference.
+            await import(plugin)
+              .then(async (mod) => {
+                const seen = new Set<PluginInstance>()
+                for (const [_name, fn] of Object.entries<PluginInstance>(mod)) {
+                  if (seen.has(fn)) continue
+                  seen.add(fn)
+                  hooks.push(await fn(input))
+                }
+              })
+              .catch((err) => {
+                const message = err instanceof Error ? err.message : String(err)
+                log.error("failed to load plugin", { path: plugin, error: message })
+                void import("../session").then(({ Session }) =>
+                  Bus.publish(Session.Event.Error, {
+                    error: new NamedError.Unknown({
+                      message: `Failed to load plugin ${plugin}: ${message}`,
+                    }).toObject(),
+                  }),
+                )
+              })
+          }
+        })
       })
-      if (init) hooks.push(init)
-    }
 
-    let plugins = config.plugin ?? []
-    if (plugins.length) await Config.waitForDependencies()
-
-    for (let plugin of plugins) {
-      // ignore old codex plugin since it is supported first party now
-      if (plugin.includes("opencode-openai-codex-auth") || plugin.includes("opencode-copilot-auth")) continue
-      log.info("loading plugin", { path: plugin })
-      if (!plugin.startsWith("file://")) {
-        const lastAtIndex = plugin.lastIndexOf("@")
-        const pkg = lastAtIndex > 0 ? plugin.substring(0, lastAtIndex) : plugin
-        const version = lastAtIndex > 0 ? plugin.substring(lastAtIndex + 1) : "latest"
-        plugin = await BunProc.install(pkg, version).catch((err) => {
-          const cause = err instanceof Error ? err.cause : err
-          const detail = cause instanceof Error ? cause.message : String(cause ?? err)
-          log.error("failed to install plugin", { pkg, version, error: detail })
-          Bus.publish(Session.Event.Error, {
-            error: new NamedError.Unknown({
-              message: `Failed to install plugin ${pkg}@${version}: ${detail}`,
-            }).toObject(),
-          })
-          return ""
+      const ensure = Effect.fn("Plugin.ensure")(function* () {
+        yield* Effect.promise(() => {
+          task ??= Effect.runPromise(
+            load().pipe(Effect.catchCause((cause) => Effect.sync(() => log.error("init failed", { cause })))),
+          )
+          return task
         })
-        if (!plugin) continue
-      }
-      // Prevent duplicate initialization when plugins export the same function
-      // as both a named export and default export (e.g., `export const X` and `export default X`).
-      // Object.entries(mod) would return both entries pointing to the same function reference.
-      await import(plugin)
-        .then(async (mod) => {
-          const seen = new Set<PluginInstance>()
-          for (const [_name, fn] of Object.entries<PluginInstance>(mod)) {
-            if (seen.has(fn)) continue
-            seen.add(fn)
-            hooks.push(await fn(input))
+      })
+
+      const trigger = Effect.fn("Plugin.trigger")(function* <
+        Name extends Exclude<keyof Required<Hooks>, "auth" | "event" | "tool">,
+        Input = Parameters<Required<Hooks>[Name]>[0],
+        Output = Parameters<Required<Hooks>[Name]>[1],
+      >(name: Name, input: Input, output: Output) {
+        if (!name) return output
+        yield* ensure()
+        yield* Effect.promise(async () => {
+          for (const hook of hooks) {
+            const fn = hook[name]
+            if (!fn) continue
+            // @ts-expect-error if you feel adventurous, please fix the typing, make sure to bump the try-counter if you
+            // give up.
+            // try-counter: 2
+            await fn(input, output)
           }
         })
-        .catch((err) => {
-          const message = err instanceof Error ? err.message : String(err)
-          log.error("failed to load plugin", { path: plugin, error: message })
-          Bus.publish(Session.Event.Error, {
-            error: new NamedError.Unknown({
-              message: `Failed to load plugin ${plugin}: ${message}`,
-            }).toObject(),
+        return output
+      })
+
+      const list = Effect.fn("Plugin.list")(function* () {
+        yield* ensure()
+        return hooks
+      })
+
+      const init = Effect.fn("Plugin.init")(function* () {
+        yield* ensure()
+        yield* Effect.promise(async () => {
+          const { Config } = await import("../config/config")
+          const config = await Config.get()
+          for (const hook of hooks) {
+            await (hook as any).config?.(config)
+          }
+          Bus.subscribeAll(async (input) => {
+            for (const hook of hooks) {
+              hook["event"]?.({
+                event: input,
+              })
+            }
           })
         })
-    }
+      })
 
-    return {
-      hooks,
-      input,
-    }
-  })
+      return Service.of({ trigger, list, init })
+    }),
+  ).pipe(Layer.fresh)
+
+  async function run<A, E>(effect: Effect.Effect<A, E, Service>) {
+    const { runPromiseInstance } = await import("@/effect/runtime")
+    return runPromiseInstance(effect)
+  }
 
   export async function trigger<
     Name extends Exclude<keyof Required<Hooks>, "auth" | "event" | "tool">,
     Input = Parameters<Required<Hooks>[Name]>[0],
     Output = Parameters<Required<Hooks>[Name]>[1],
   >(name: Name, input: Input, output: Output): Promise<Output> {
-    if (!name) return output
-    for (const hook of await state().then((x) => x.hooks)) {
-      const fn = hook[name]
-      if (!fn) continue
-      // @ts-expect-error if you feel adventurous, please fix the typing, make sure to bump the try-counter if you
-      // give up.
-      // try-counter: 2
-      await fn(input, output)
-    }
-    return output
+    return run(Service.use((svc) => svc.trigger(name, input, output)))
   }
 
-  export async function list() {
-    return state().then((x) => x.hooks)
+  export async function list(): Promise<Hooks[]> {
+    return run(Service.use((svc) => svc.list()))
   }
 
   export async function init() {
-    const hooks = await state().then((x) => x.hooks)
-    const config = await Config.get()
-    for (const hook of hooks) {
-      // @ts-expect-error this is because we haven't moved plugin to sdk v2
-      await hook.config?.(config)
-    }
-    Bus.subscribeAll(async (input) => {
-      const hooks = await state().then((x) => x.hooks)
-      for (const hook of hooks) {
-        hook["event"]?.({
-          event: input,
-        })
-      }
-    })
+    return run(Service.use((svc) => svc.init()))
   }
 }

packages/opencode/src/provider/auth-service.ts

@@ -1,4 +1,4 @@
-import type { AuthOuathResult } from "@opencode-ai/plugin"
+import type { AuthOuathResult, Hooks } from "@opencode-ai/plugin"
 import { NamedError } from "@opencode-ai/util/error"
 import * as Auth from "@/auth/effect"
 import { ProviderID } from "./schema"
@@ -6,6 +6,8 @@ import { Array as Arr, Effect, Layer, Record, Result, ServiceMap, Struct } from
 import z from "zod"
 
 export namespace ProviderAuth {
+  type Hook = NonNullable<Hooks["auth"]>
+
   export const Method = z
     .object({
       type: z.union([z.literal("oauth"), z.literal("api")]),
@@ -105,20 +107,26 @@ export namespace ProviderAuth {
     Service,
     Effect.gen(function* () {
       const auth = yield* Auth.Auth.Service
-      const hooks = yield* Effect.promise(async () => {
-        const mod = await import("../plugin")
-        const plugins = await mod.Plugin.list()
-        return Record.fromEntries(
-          Arr.filterMap(plugins, (x) =>
-            x.auth?.provider !== undefined
-              ? Result.succeed([ProviderID.make(x.auth.provider), x.auth] as const)
-              : Result.failVoid,
-          ),
-        )
-      })
+      let hooks: Record<ProviderID, Hook> | undefined
       const pending = new Map<ProviderID, AuthOuathResult>()
 
+      const load = Effect.fn("ProviderAuth.load")(function* () {
+        if (hooks) return hooks
+        hooks = yield* Effect.promise(async () => {
+          const mod = await import("../plugin")
+          const plugins = await mod.Plugin.list()
+          const result = {} as Record<ProviderID, Hook>
+          for (const item of plugins) {
+            if (item.auth?.provider === undefined) continue
+            result[ProviderID.make(item.auth.provider)] = item.auth
+          }
+          return result
+        })
+        return hooks
+      })
+
       const methods = Effect.fn("ProviderAuth.methods")(function* () {
+        const hooks = yield* load()
         return Record.map(hooks, (item) =>
           item.methods.map(
             (method): Method => ({
@@ -152,6 +160,7 @@ export namespace ProviderAuth {
         method: number
         inputs?: Record<string, string>
       }) {
+        const hooks = yield* load()
         const method = hooks[input.providerID].methods[input.method]
         if (method.type !== "oauth") return
 
@@ -178,6 +187,7 @@ export namespace ProviderAuth {
         method: number
         code?: string
       }) {
+        yield* load()
         const match = pending.get(input.providerID)
         if (!match) return yield* Effect.fail(new OauthMissing({ providerID: input.providerID }))
         if (match.method === "code" && !input.code) {

packages/opencode/src/worktree/index.ts

@@ -4,17 +4,17 @@ import z from "zod"
 import { NamedError } from "@opencode-ai/util/error"
 import { Global } from "../global"
 import { Instance } from "../project/instance"
+import { InstanceBootstrap } from "../project/bootstrap"
 import { Project } from "../project/project"
 import { Database, eq } from "../storage/db"
 import { ProjectTable } from "../project/project.sql"
 import type { ProjectID } from "../project/schema"
+import { fn } from "../util/fn"
 import { Log } from "../util/log"
 import { Process } from "../util/process"
 import { git } from "../util/git"
 import { BusEvent } from "@/bus/bus-event"
 import { GlobalBus } from "@/bus/global"
-import { InstanceContext } from "@/effect/instance-context"
-import { Effect, Layer, ServiceMap } from "effect"
 
 export namespace Worktree {
   const log = Log.create({ service: "worktree" })
@@ -267,7 +267,7 @@ export namespace Worktree {
     return process.platform === "win32" ? normalized.toLowerCase() : normalized
   }
 
-  async function candidateName(worktreeDir: string, root: string, base?: string) {
+  async function candidate(root: string, base?: string) {
     for (const attempt of Array.from({ length: 26 }, (_, i) => i)) {
       const name = base ? (attempt === 0 ? base : `${base}-${randomName()}`) : randomName()
       const branch = `opencode/${name}`
@@ -277,7 +277,7 @@ export namespace Worktree {
 
       const ref = `refs/heads/${branch}`
       const branchCheck = await git(["show-ref", "--verify", "--quiet", ref], {
-        cwd: worktreeDir,
+        cwd: Instance.worktree,
       })
       if (branchCheck.exitCode === 0) continue
 
@@ -335,424 +335,338 @@ export namespace Worktree {
     }, 0)
   }
 
-  // ---------------------------------------------------------------------------
-  // Effect service
-  // ---------------------------------------------------------------------------
-
-  export interface Interface {
-    readonly makeWorktreeInfo: (name?: string) => Effect.Effect<Info>
-    readonly createFromInfo: (info: Info, startCommand?: string) => Effect.Effect<() => Promise<void>>
-    readonly create: (input?: CreateInput) => Effect.Effect<Info>
-    readonly remove: (input: RemoveInput) => Effect.Effect<boolean>
-    readonly reset: (input: ResetInput) => Effect.Effect<boolean>
-  }
-
-  export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Worktree") {}
-
-  export const layer = Layer.effect(
-    Service,
-    Effect.gen(function* () {
-      const instance = yield* InstanceContext
-
-      const makeWorktreeInfoEffect = Effect.fn("Worktree.makeWorktreeInfo")(function* (name?: string) {
-        return yield* Effect.promise(async () => {
-          if (instance.project.vcs !== "git") {
-            throw new NotGitError({ message: "Worktrees are only supported for git projects" })
-          }
-
-          const root = path.join(Global.Path.data, "worktree", instance.project.id)
-          await fs.mkdir(root, { recursive: true })
-
-          const base = name ? slug(name) : ""
-          return candidateName(instance.worktree, root, base || undefined)
-        })
-      })
-
-      const createFromInfoEffect = Effect.fn("Worktree.createFromInfo")(function* (info: Info, startCommand?: string) {
-        return yield* Effect.promise(async (): Promise<() => Promise<void>> => {
-          const created = await git(["worktree", "add", "--no-checkout", "-b", info.branch, info.directory], {
-            cwd: instance.worktree,
-          })
-          if (created.exitCode !== 0) {
-            throw new CreateFailedError({ message: errorText(created) || "Failed to create git worktree" })
-          }
-
-          await Project.addSandbox(instance.project.id, info.directory).catch(() => undefined)
-
-          const projectID = instance.project.id
-          const extra = startCommand?.trim()
-
-          return () => {
-            const start = async () => {
-              const populated = await git(["reset", "--hard"], { cwd: info.directory })
-              if (populated.exitCode !== 0) {
-                const message = errorText(populated) || "Failed to populate worktree"
-                log.error("worktree checkout failed", { directory: info.directory, message })
-                GlobalBus.emit("event", {
-                  directory: info.directory,
-                  payload: {
-                    type: Event.Failed.type,
-                    properties: {
-                      message,
-                    },
-                  },
-                })
-                return
-              }
-
-              const booted = await Instance.provide({
-                directory: info.directory,
-                init: async () => {
-                  const { InstanceBootstrap } = await import("../project/bootstrap")
-                  return InstanceBootstrap()
-                },
-                fn: () => undefined,
-              })
-                .then(() => true)
-                .catch((error) => {
-                  const message = error instanceof Error ? error.message : String(error)
-                  log.error("worktree bootstrap failed", { directory: info.directory, message })
-                  GlobalBus.emit("event", {
-                    directory: info.directory,
-                    payload: {
-                      type: Event.Failed.type,
-                      properties: {
-                        message,
-                      },
-                    },
-                  })
-                  return false
-                })
-              if (!booted) return
-
-              GlobalBus.emit("event", {
-                directory: info.directory,
-                payload: {
-                  type: Event.Ready.type,
-                  properties: {
-                    name: info.name,
-                    branch: info.branch,
-                  },
-                },
-              })
-
-              await runStartScripts(info.directory, { projectID, extra })
-            }
-
-            return start().catch((error) => {
-              log.error("worktree start task failed", { directory: info.directory, error })
-            })
-          }
-        })
-      })
-
-      const createEffect = Effect.fn("Worktree.create")(function* (input?: CreateInput) {
-        const parsed = input ? CreateInput.optional().parse(input) : undefined
-        const info = yield* makeWorktreeInfoEffect(parsed?.name)
-        const bootstrap = yield* createFromInfoEffect(info, parsed?.startCommand)
-        // This is needed due to how worktrees currently work in the
-        // desktop app
-        setTimeout(() => {
-          bootstrap()
-        }, 0)
-        return info
-      })
-
-      const removeEffect = Effect.fn("Worktree.remove")(function* (input: RemoveInput) {
-        return yield* Effect.promise(async () => {
-          const parsed = RemoveInput.parse(input)
-          if (instance.project.vcs !== "git") {
-            throw new NotGitError({ message: "Worktrees are only supported for git projects" })
-          }
-
-          const directory = await canonical(parsed.directory)
-          const locate = async (stdout: Uint8Array | undefined) => {
-            const lines = outputText(stdout)
-              .split("\n")
-              .map((line) => line.trim())
-            const entries = lines.reduce<{ path?: string; branch?: string }[]>((acc, line) => {
-              if (!line) return acc
-              if (line.startsWith("worktree ")) {
-                acc.push({ path: line.slice("worktree ".length).trim() })
-                return acc
-              }
-              const current = acc[acc.length - 1]
-              if (!current) return acc
-              if (line.startsWith("branch ")) {
-                current.branch = line.slice("branch ".length).trim()
-              }
-              return acc
-            }, [])
-
-            return (async () => {
-              for (const item of entries) {
-                if (!item.path) continue
-                const key = await canonical(item.path)
-                if (key === directory) return item
-              }
-            })()
-          }
-
-          const clean = (target: string) =>
-            fs
-              .rm(target, {
-                recursive: true,
-                force: true,
-                maxRetries: 5,
-                retryDelay: 100,
-              })
-              .catch((error) => {
-                const message = error instanceof Error ? error.message : String(error)
-                throw new RemoveFailedError({ message: message || "Failed to remove git worktree directory" })
-              })
-
-          const stop = async (target: string) => {
-            if (!(await exists(target))) return
-            await git(["fsmonitor--daemon", "stop"], { cwd: target })
-          }
-
-          const list = await git(["worktree", "list", "--porcelain"], { cwd: instance.worktree })
-          if (list.exitCode !== 0) {
-            throw new RemoveFailedError({ message: errorText(list) || "Failed to read git worktrees" })
-          }
-
-          const entry = await locate(list.stdout)
-
-          if (!entry?.path) {
-            const directoryExists = await exists(directory)
-            if (directoryExists) {
-              await stop(directory)
-              await clean(directory)
-            }
-            return true
-          }
-
-          await stop(entry.path)
-          const removed = await git(["worktree", "remove", "--force", entry.path], {
-            cwd: instance.worktree,
-          })
-          if (removed.exitCode !== 0) {
-            const next = await git(["worktree", "list", "--porcelain"], { cwd: instance.worktree })
-            if (next.exitCode !== 0) {
-              throw new RemoveFailedError({
-                message: errorText(removed) || errorText(next) || "Failed to remove git worktree",
-              })
-            }
-
-            const stale = await locate(next.stdout)
-            if (stale?.path) {
-              throw new RemoveFailedError({ message: errorText(removed) || "Failed to remove git worktree" })
-            }
-          }
-
-          await clean(entry.path)
-
-          const branch = entry.branch?.replace(/^refs\/heads\//, "")
-          if (branch) {
-            const deleted = await git(["branch", "-D", branch], { cwd: instance.worktree })
-            if (deleted.exitCode !== 0) {
-              throw new RemoveFailedError({ message: errorText(deleted) || "Failed to delete worktree branch" })
-            }
-          }
-
-          return true
-        })
-      })
-
-      const resetEffect = Effect.fn("Worktree.reset")(function* (input: ResetInput) {
-        return yield* Effect.promise(async () => {
-          const parsed = ResetInput.parse(input)
-          if (instance.project.vcs !== "git") {
-            throw new NotGitError({ message: "Worktrees are only supported for git projects" })
-          }
-
-          const directory = await canonical(parsed.directory)
-          const primary = await canonical(instance.worktree)
-          if (directory === primary) {
-            throw new ResetFailedError({ message: "Cannot reset the primary workspace" })
-          }
-
-          const list = await git(["worktree", "list", "--porcelain"], { cwd: instance.worktree })
-          if (list.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(list) || "Failed to read git worktrees" })
-          }
-
-          const lines = outputText(list.stdout)
-            .split("\n")
-            .map((line) => line.trim())
-          const entries = lines.reduce<{ path?: string; branch?: string }[]>((acc, line) => {
-            if (!line) return acc
-            if (line.startsWith("worktree ")) {
-              acc.push({ path: line.slice("worktree ".length).trim() })
-              return acc
-            }
-            const current = acc[acc.length - 1]
-            if (!current) return acc
-            if (line.startsWith("branch ")) {
-              current.branch = line.slice("branch ".length).trim()
-            }
-            return acc
-          }, [])
-
-          const entry = await (async () => {
-            for (const item of entries) {
-              if (!item.path) continue
-              const key = await canonical(item.path)
-              if (key === directory) return item
-            }
-          })()
-          if (!entry?.path) {
-            throw new ResetFailedError({ message: "Worktree not found" })
-          }
-
-          const remoteList = await git(["remote"], { cwd: instance.worktree })
-          if (remoteList.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(remoteList) || "Failed to list git remotes" })
-          }
-
-          const remotes = outputText(remoteList.stdout)
-            .split("\n")
-            .map((line) => line.trim())
-            .filter(Boolean)
-
-          const remote = remotes.includes("origin")
-            ? "origin"
-            : remotes.length === 1
-              ? remotes[0]
-              : remotes.includes("upstream")
-                ? "upstream"
-                : ""
-
-          const remoteHead = remote
-            ? await git(["symbolic-ref", `refs/remotes/${remote}/HEAD`], { cwd: instance.worktree })
-            : { exitCode: 1, stdout: undefined, stderr: undefined }
-
-          const remoteRef = remoteHead.exitCode === 0 ? outputText(remoteHead.stdout) : ""
-          const remoteTarget = remoteRef ? remoteRef.replace(/^refs\/remotes\//, "") : ""
-          const remoteBranch =
-            remote && remoteTarget.startsWith(`${remote}/`) ? remoteTarget.slice(`${remote}/`.length) : ""
-
-          const mainCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/main"], {
-            cwd: instance.worktree,
-          })
-          const masterCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/master"], {
-            cwd: instance.worktree,
-          })
-          const localBranch = mainCheck.exitCode === 0 ? "main" : masterCheck.exitCode === 0 ? "master" : ""
-
-          const target = remoteBranch ? `${remote}/${remoteBranch}` : localBranch
-          if (!target) {
-            throw new ResetFailedError({ message: "Default branch not found" })
-          }
-
-          if (remoteBranch) {
-            const fetch = await git(["fetch", remote, remoteBranch], { cwd: instance.worktree })
-            if (fetch.exitCode !== 0) {
-              throw new ResetFailedError({ message: errorText(fetch) || `Failed to fetch ${target}` })
-            }
-          }
-
-          if (!entry.path) {
-            throw new ResetFailedError({ message: "Worktree path not found" })
-          }
-
-          const worktreePath = entry.path
-
-          const resetToTarget = await git(["reset", "--hard", target], { cwd: worktreePath })
-          if (resetToTarget.exitCode !== 0) {
-            throw new ResetFailedError({
-              message: errorText(resetToTarget) || "Failed to reset worktree to target",
-            })
-          }
-
-          const cleanResult = await sweep(worktreePath)
-          if (cleanResult.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(cleanResult) || "Failed to clean worktree" })
-          }
-
-          const update = await git(["submodule", "update", "--init", "--recursive", "--force"], {
-            cwd: worktreePath,
-          })
-          if (update.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(update) || "Failed to update submodules" })
-          }
-
-          const subReset = await git(["submodule", "foreach", "--recursive", "git", "reset", "--hard"], {
-            cwd: worktreePath,
-          })
-          if (subReset.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(subReset) || "Failed to reset submodules" })
-          }
-
-          const subClean = await git(["submodule", "foreach", "--recursive", "git", "clean", "-fdx"], {
-            cwd: worktreePath,
-          })
-          if (subClean.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(subClean) || "Failed to clean submodules" })
-          }
-
-          const status = await git(["-c", "core.fsmonitor=false", "status", "--porcelain=v1"], { cwd: worktreePath })
-          if (status.exitCode !== 0) {
-            throw new ResetFailedError({ message: errorText(status) || "Failed to read git status" })
-          }
-
-          const dirty = outputText(status.stdout)
-          if (dirty) {
-            throw new ResetFailedError({ message: `Worktree reset left local changes:\n${dirty}` })
-          }
-
-          const projectID = instance.project.id
-          queueStartScripts(worktreePath, { projectID })
-
-          return true
-        })
-      })
-
-      return Service.of({
-        makeWorktreeInfo: makeWorktreeInfoEffect,
-        createFromInfo: createFromInfoEffect,
-        create: createEffect,
-        remove: removeEffect,
-        reset: resetEffect,
-      })
-    }),
-  ).pipe(Layer.fresh)
-
-  async function run<A, E>(effect: Effect.Effect<A, E, Service>) {
-    const { runPromiseInstance } = await import("@/effect/runtime")
-    return runPromiseInstance(effect)
-  }
-
-  // ---------------------------------------------------------------------------
-  // Promise facades
-  // ---------------------------------------------------------------------------
-
   export async function makeWorktreeInfo(name?: string): Promise<Info> {
-    return run(Service.use((svc) => svc.makeWorktreeInfo(name)))
+    if (Instance.project.vcs !== "git") {
+      throw new NotGitError({ message: "Worktrees are only supported for git projects" })
+    }
+
+    const root = path.join(Global.Path.data, "worktree", Instance.project.id)
+    await fs.mkdir(root, { recursive: true })
+
+    const base = name ? slug(name) : ""
+    return candidate(root, base || undefined)
   }
 
   export async function createFromInfo(info: Info, startCommand?: string) {
-    return run(Service.use((svc) => svc.createFromInfo(info, startCommand)))
+    const created = await git(["worktree", "add", "--no-checkout", "-b", info.branch, info.directory], {
+      cwd: Instance.worktree,
+    })
+    if (created.exitCode !== 0) {
+      throw new CreateFailedError({ message: errorText(created) || "Failed to create git worktree" })
+    }
+
+    await Project.addSandbox(Instance.project.id, info.directory).catch(() => undefined)
+
+    const projectID = Instance.project.id
+    const extra = startCommand?.trim()
+
+    return () => {
+      const start = async () => {
+        const populated = await git(["reset", "--hard"], { cwd: info.directory })
+        if (populated.exitCode !== 0) {
+          const message = errorText(populated) || "Failed to populate worktree"
+          log.error("worktree checkout failed", { directory: info.directory, message })
+          GlobalBus.emit("event", {
+            directory: info.directory,
+            payload: {
+              type: Event.Failed.type,
+              properties: {
+                message,
+              },
+            },
+          })
+          return
+        }
+
+        const booted = await Instance.provide({
+          directory: info.directory,
+          init: InstanceBootstrap,
+          fn: () => undefined,
+        })
+          .then(() => true)
+          .catch((error) => {
+            const message = error instanceof Error ? error.message : String(error)
+            log.error("worktree bootstrap failed", { directory: info.directory, message })
+            GlobalBus.emit("event", {
+              directory: info.directory,
+              payload: {
+                type: Event.Failed.type,
+                properties: {
+                  message,
+                },
+              },
+            })
+            return false
+          })
+        if (!booted) return
+
+        GlobalBus.emit("event", {
+          directory: info.directory,
+          payload: {
+            type: Event.Ready.type,
+            properties: {
+              name: info.name,
+              branch: info.branch,
+            },
+          },
+        })
+
+        await runStartScripts(info.directory, { projectID, extra })
+      }
+
+      return start().catch((error) => {
+        log.error("worktree start task failed", { directory: info.directory, error })
+      })
+    }
   }
 
-  export const create = Object.assign(
-    async (input?: CreateInput) => {
-      return run(Service.use((svc) => svc.create(input)))
-    },
-    { schema: CreateInput.optional() },
-  )
+  export const create = fn(CreateInput.optional(), async (input) => {
+    const info = await makeWorktreeInfo(input?.name)
+    const bootstrap = await createFromInfo(info, input?.startCommand)
+    // This is needed due to how worktrees currently work in the
+    // desktop app
+    setTimeout(() => {
+      bootstrap()
+    }, 0)
+    return info
+  })
 
-  export const remove = Object.assign(
-    async (input: RemoveInput) => {
-      return run(Service.use((svc) => svc.remove(input)))
-    },
-    { schema: RemoveInput },
-  )
+  export const remove = fn(RemoveInput, async (input) => {
+    if (Instance.project.vcs !== "git") {
+      throw new NotGitError({ message: "Worktrees are only supported for git projects" })
+    }
 
-  export const reset = Object.assign(
-    async (input: ResetInput) => {
-      return run(Service.use((svc) => svc.reset(input)))
-    },
-    { schema: ResetInput },
-  )
+    const directory = await canonical(input.directory)
+    const locate = async (stdout: Uint8Array | undefined) => {
+      const lines = outputText(stdout)
+        .split("\n")
+        .map((line) => line.trim())
+      const entries = lines.reduce<{ path?: string; branch?: string }[]>((acc, line) => {
+        if (!line) return acc
+        if (line.startsWith("worktree ")) {
+          acc.push({ path: line.slice("worktree ".length).trim() })
+          return acc
+        }
+        const current = acc[acc.length - 1]
+        if (!current) return acc
+        if (line.startsWith("branch ")) {
+          current.branch = line.slice("branch ".length).trim()
+        }
+        return acc
+      }, [])
+
+      return (async () => {
+        for (const item of entries) {
+          if (!item.path) continue
+          const key = await canonical(item.path)
+          if (key === directory) return item
+        }
+      })()
+    }
+
+    const clean = (target: string) =>
+      fs
+        .rm(target, {
+          recursive: true,
+          force: true,
+          maxRetries: 5,
+          retryDelay: 100,
+        })
+        .catch((error) => {
+          const message = error instanceof Error ? error.message : String(error)
+          throw new RemoveFailedError({ message: message || "Failed to remove git worktree directory" })
+        })
+
+    const stop = async (target: string) => {
+      if (!(await exists(target))) return
+      await git(["fsmonitor--daemon", "stop"], { cwd: target })
+    }
+
+    const list = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
+    if (list.exitCode !== 0) {
+      throw new RemoveFailedError({ message: errorText(list) || "Failed to read git worktrees" })
+    }
+
+    const entry = await locate(list.stdout)
+
+    if (!entry?.path) {
+      const directoryExists = await exists(directory)
+      if (directoryExists) {
+        await stop(directory)
+        await clean(directory)
+      }
+      return true
+    }
+
+    await stop(entry.path)
+    const removed = await git(["worktree", "remove", "--force", entry.path], {
+      cwd: Instance.worktree,
+    })
+    if (removed.exitCode !== 0) {
+      const next = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
+      if (next.exitCode !== 0) {
+        throw new RemoveFailedError({
+          message: errorText(removed) || errorText(next) || "Failed to remove git worktree",
+        })
+      }
+
+      const stale = await locate(next.stdout)
+      if (stale?.path) {
+        throw new RemoveFailedError({ message: errorText(removed) || "Failed to remove git worktree" })
+      }
+    }
+
+    await clean(entry.path)
+
+    const branch = entry.branch?.replace(/^refs\/heads\//, "")
+    if (branch) {
+      const deleted = await git(["branch", "-D", branch], { cwd: Instance.worktree })
+      if (deleted.exitCode !== 0) {
+        throw new RemoveFailedError({ message: errorText(deleted) || "Failed to delete worktree branch" })
+      }
+    }
+
+    return true
+  })
+
+  export const reset = fn(ResetInput, async (input) => {
+    if (Instance.project.vcs !== "git") {
+      throw new NotGitError({ message: "Worktrees are only supported for git projects" })
+    }
+
+    const directory = await canonical(input.directory)
+    const primary = await canonical(Instance.worktree)
+    if (directory === primary) {
+      throw new ResetFailedError({ message: "Cannot reset the primary workspace" })
+    }
+
+    const list = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
+    if (list.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(list) || "Failed to read git worktrees" })
+    }
+
+    const lines = outputText(list.stdout)
+      .split("\n")
+      .map((line) => line.trim())
+    const entries = lines.reduce<{ path?: string; branch?: string }[]>((acc, line) => {
+      if (!line) return acc
+      if (line.startsWith("worktree ")) {
+        acc.push({ path: line.slice("worktree ".length).trim() })
+        return acc
+      }
+      const current = acc[acc.length - 1]
+      if (!current) return acc
+      if (line.startsWith("branch ")) {
+        current.branch = line.slice("branch ".length).trim()
+      }
+      return acc
+    }, [])
+
+    const entry = await (async () => {
+      for (const item of entries) {
+        if (!item.path) continue
+        const key = await canonical(item.path)
+        if (key === directory) return item
+      }
+    })()
+    if (!entry?.path) {
+      throw new ResetFailedError({ message: "Worktree not found" })
+    }
+
+    const remoteList = await git(["remote"], { cwd: Instance.worktree })
+    if (remoteList.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(remoteList) || "Failed to list git remotes" })
+    }
+
+    const remotes = outputText(remoteList.stdout)
+      .split("\n")
+      .map((line) => line.trim())
+      .filter(Boolean)
+
+    const remote = remotes.includes("origin")
+      ? "origin"
+      : remotes.length === 1
+        ? remotes[0]
+        : remotes.includes("upstream")
+          ? "upstream"
+          : ""
+
+    const remoteHead = remote
+      ? await git(["symbolic-ref", `refs/remotes/${remote}/HEAD`], { cwd: Instance.worktree })
+      : { exitCode: 1, stdout: undefined, stderr: undefined }
+
+    const remoteRef = remoteHead.exitCode === 0 ? outputText(remoteHead.stdout) : ""
+    const remoteTarget = remoteRef ? remoteRef.replace(/^refs\/remotes\//, "") : ""
+    const remoteBranch = remote && remoteTarget.startsWith(`${remote}/`) ? remoteTarget.slice(`${remote}/`.length) : ""
+
+    const mainCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/main"], {
+      cwd: Instance.worktree,
+    })
+    const masterCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/master"], {
+      cwd: Instance.worktree,
+    })
+    const localBranch = mainCheck.exitCode === 0 ? "main" : masterCheck.exitCode === 0 ? "master" : ""
+
+    const target = remoteBranch ? `${remote}/${remoteBranch}` : localBranch
+    if (!target) {
+      throw new ResetFailedError({ message: "Default branch not found" })
+    }
+
+    if (remoteBranch) {
+      const fetch = await git(["fetch", remote, remoteBranch], { cwd: Instance.worktree })
+      if (fetch.exitCode !== 0) {
+        throw new ResetFailedError({ message: errorText(fetch) || `Failed to fetch ${target}` })
+      }
+    }
+
+    if (!entry.path) {
+      throw new ResetFailedError({ message: "Worktree path not found" })
+    }
+
+    const worktreePath = entry.path
+
+    const resetToTarget = await git(["reset", "--hard", target], { cwd: worktreePath })
+    if (resetToTarget.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(resetToTarget) || "Failed to reset worktree to target" })
+    }
+
+    const clean = await sweep(worktreePath)
+    if (clean.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(clean) || "Failed to clean worktree" })
+    }
+
+    const update = await git(["submodule", "update", "--init", "--recursive", "--force"], { cwd: worktreePath })
+    if (update.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(update) || "Failed to update submodules" })
+    }
+
+    const subReset = await git(["submodule", "foreach", "--recursive", "git", "reset", "--hard"], {
+      cwd: worktreePath,
+    })
+    if (subReset.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(subReset) || "Failed to reset submodules" })
+    }
+
+    const subClean = await git(["submodule", "foreach", "--recursive", "git", "clean", "-fdx"], {
+      cwd: worktreePath,
+    })
+    if (subClean.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(subClean) || "Failed to clean submodules" })
+    }
+
+    const status = await git(["-c", "core.fsmonitor=false", "status", "--porcelain=v1"], { cwd: worktreePath })
+    if (status.exitCode !== 0) {
+      throw new ResetFailedError({ message: errorText(status) || "Failed to read git status" })
+    }
+
+    const dirty = outputText(status.stdout)
+    if (dirty) {
+      throw new ResetFailedError({ message: `Worktree reset left local changes:\n${dirty}` })
+    }
+
+    const projectID = Instance.project.id
+    queueStartScripts(worktreePath, { projectID })
+
+    return true
+  })
 }

packages/opencode/test/file/watcher.test.ts

@@ -16,7 +16,7 @@ const describeWatcher = FileWatcher.hasNativeBinding() && !process.env.CI ? desc
 // Helpers
 // ---------------------------------------------------------------------------
 
-type BusUpdate = { directory?: string; payload: { type: string; properties: WatcherEvent } }
+type BusUpdate = { directory?: string; payload: { type: string; properties: Record<string, unknown> } }
 type WatcherEvent = { file: string; event: "add" | "change" | "unlink" }
 
 /** Run `body` with a live FileWatcher service. */
@@ -40,18 +40,18 @@ function listen(directory: string, check: (evt: WatcherEvent) => boolean, hit: (
     if (done) return
     if (evt.directory !== directory) return
     if (evt.payload.type !== FileWatcher.Event.Updated.type) return
-    if (!check(evt.payload.properties)) return
-    hit(evt.payload.properties)
+    const props = evt.payload.properties as WatcherEvent
+    if (!check(props)) return
+    hit(props)
   }
 
-  function cleanup() {
+  GlobalBus.on("event", on)
+
+  return () => {
     if (done) return
     done = true
     GlobalBus.off("event", on)
   }
-
-  GlobalBus.on("event", on)
-  return cleanup
 }
 
 function wait(directory: string, check: (evt: WatcherEvent) => boolean) {