feat(core): worktree-based workspace switching with stash-based warp

packages/opencode/src/cli/cmd/worktree.ts

@@ -0,0 +1,168 @@
+import type { Argv } from "yargs"
+import { EOL } from "os"
+import { Effect } from "effect"
+import { cmd } from "./cmd"
+import { effectCmd, fail } from "../effect-cmd"
+import { Worktree } from "@/worktree"
+import { UI } from "../ui"
+import { GlobalBus, type GlobalEvent } from "@/bus/global"
+
+function formatTable(entries: (Omit<Worktree.Info, "branch"> & { branch?: string })[]): string {
+  const maxName = Math.max(4, ...entries.map((e) => e.name.length))
+  const maxBranch = Math.max(6, ...entries.map((e) => (e.branch ?? "-").length))
+  const fmt = `  ${"Name".padEnd(maxName)}  ${"Branch".padEnd(maxBranch)}  Directory`
+  const sep = "  " + "─".repeat(maxName) + "  " + "─".repeat(maxBranch) + "  " + "─".repeat(80)
+  const rows = entries.map(
+    (e) => `  ${e.name.padEnd(maxName)}  ${(e.branch ?? "-").padEnd(maxBranch)}  ${e.directory}`,
+  )
+  return [fmt, sep, ...rows].join(EOL)
+}
+
+export const WorktreeCommand = cmd({
+  command: "worktree",
+  describe: "manage git worktrees",
+  builder: (yargs: Argv) =>
+    yargs
+      .command(WorktreeCreateCommand)
+      .command(WorktreeListCommand)
+      .command(WorktreeRemoveCommand)
+      .command(WorktreeResetCommand)
+      .demandCommand(),
+  async handler() {},
+})
+
+const waitWorktreeEvent = (directory: string) =>
+  Effect.callback<"ready" | "failed", never>((resume) => {
+    const handler = (event: GlobalEvent) => {
+      if (event.directory !== directory) return
+      if (event.payload.type === Worktree.Event.Ready.type) {
+        GlobalBus.off("event", handler)
+        resume(Effect.succeed("ready" as const))
+      }
+      if (event.payload.type === Worktree.Event.Failed.type) {
+        GlobalBus.off("event", handler)
+        resume(Effect.succeed("failed" as const))
+      }
+    }
+
+    GlobalBus.on("event", handler)
+    return Effect.sync(() => GlobalBus.off("event", handler))
+  })
+
+export const WorktreeCreateCommand = effectCmd({
+  command: "create",
+  describe: "create a worktree",
+  builder: (yargs) =>
+    yargs
+      .option("name", {
+        describe: "worktree name (slug; generated if omitted)",
+        type: "string",
+      })
+      .option("start-command", {
+        describe: "additional startup script",
+        type: "string",
+      }),
+  handler: Effect.fn("Cli.worktree.create")(function* (args) {
+    const svc = yield* Worktree.Service
+    const info = yield* svc.create({ name: args.name, startCommand: args.startCommand }).pipe(
+      Effect.catch((e) => fail(e.message)),
+    )
+
+    UI.println(UI.Style.TEXT_DIM + "Worktree directory: " + UI.Style.TEXT_NORMAL + info.directory)
+    if (info.branch) {
+      UI.println(UI.Style.TEXT_DIM + "Branch:             " + UI.Style.TEXT_NORMAL + info.branch)
+    }
+    UI.empty()
+
+    const result = yield* waitWorktreeEvent(info.directory).pipe(
+      Effect.timeoutOrElse({
+        duration: "120 seconds",
+        orElse: () => Effect.succeed("timeout" as const),
+      }),
+    )
+
+    if (result === "timeout") {
+      UI.println(UI.Style.TEXT_WARNING_BOLD + "Worktree created but bootstrap still running" + UI.Style.TEXT_NORMAL)
+      return
+    }
+
+    if (result === "failed") {
+      return yield* fail("Worktree bootstrap failed")
+    }
+
+    UI.println(UI.Style.TEXT_SUCCESS_BOLD + "Worktree ready" + UI.Style.TEXT_NORMAL)
+  }),
+})
+
+export const WorktreeListCommand = effectCmd({
+  command: "list",
+  describe: "list worktrees",
+  builder: (yargs) =>
+    yargs.option("format", {
+      describe: "output format",
+      type: "string",
+      choices: ["table", "json"],
+      default: "table",
+    }),
+  handler: Effect.fn("Cli.worktree.list")(function* (args) {
+    const svc = yield* Worktree.Service
+    const list = yield* svc.list().pipe(
+      Effect.catch((e) => fail(e.message)),
+    )
+    if (list.length === 0) return
+    if (args.format === "json") {
+      console.log(JSON.stringify(list, null, 2))
+    } else {
+      console.log(formatTable(list))
+    }
+  }),
+})
+
+const resolveWorktreeTarget = Effect.fnUntraced(function* (svc: Worktree.Interface, name: string) {
+  const list = yield* svc.list()
+  const match = list.find((w) => w.name === name)
+  if (!match) return name
+  return match.directory
+})
+
+export const WorktreeRemoveCommand = effectCmd({
+  command: "remove <name>",
+  describe: "remove a worktree",
+  builder: (yargs) =>
+    yargs.positional("name", {
+      describe: "worktree name or directory",
+      type: "string",
+      demandOption: true,
+    }),
+  handler: Effect.fn("Cli.worktree.remove")(function* (args) {
+    const svc = yield* Worktree.Service
+    const directory = yield* resolveWorktreeTarget(svc, args.name).pipe(
+      Effect.catch((e) => fail(e.message)),
+    )
+    yield* svc.remove({ directory }).pipe(
+      Effect.catch((e) => fail(e.message)),
+    )
+    UI.println(UI.Style.TEXT_SUCCESS_BOLD + "Worktree removed" + UI.Style.TEXT_NORMAL)
+  }),
+})
+
+export const WorktreeResetCommand = effectCmd({
+  command: "reset <name>",
+  describe: "reset a worktree",
+  builder: (yargs) =>
+    yargs.positional("name", {
+      describe: "worktree name or directory",
+      type: "string",
+      demandOption: true,
+    }),
+  handler: Effect.fn("Cli.worktree.reset")(function* (args) {
+    const svc = yield* Worktree.Service
+    const directory = yield* resolveWorktreeTarget(svc, args.name).pipe(
+      Effect.catch((e) => fail(e.message)),
+    )
+    yield* svc.reset({ directory }).pipe(
+      Effect.catch((e) => fail(e.message)),
+    )
+    UI.println(UI.Style.TEXT_SUCCESS_BOLD + "Worktree reset" + UI.Style.TEXT_NORMAL)
+  }),
+})

packages/opencode/src/control-plane/adapters/worktree.ts

@@ -26,20 +26,23 @@ const provideContext = <A, E, R>(effect: Effect.Effect<A, E, R>, context: Worksp
   )
 
 export const WorktreeAdapter: WorkspaceAdapter = {
-  name: "Worktree",
+  name: "Linked workspace",
   description: "Create a git worktree",
   async configure(info, context) {
     const { AppRuntime, Worktree } = await loadWorktree()
     const next = await AppRuntime.runPromise(
       provideContext(
-        Worktree.Service.use((svc) => svc.makeWorktreeInfo({ detached: true })),
+        Worktree.Service.use((svc) =>
+          svc.makeWorktreeInfo({ detached: false, ...(info.name ? { name: info.name } : {}) }),
+        ),
         context,
       ),
     )
     return {
       ...info,
       name: next.name,
       directory: next.directory,
+      branch: next.branch ?? null,
     }
   },
   async create(info, _env, _from, context) {

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

@@ -32,7 +32,8 @@ export const create = (
 ) =>
   Effect.gen(function* () {
     const ctx = yield* context
-    return yield* EffectBridge.fromPromise(() => adapter.create(info, env, from, ctx))
+    const workspaceID = ctx.workspaceID ?? info.id
+    return yield* EffectBridge.fromPromise(() => adapter.create(info, env, from, { ...ctx, workspaceID }))
   })
 
 export const list = (adapter: WorkspaceAdapter) =>

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

@@ -64,6 +64,7 @@ export const CreateInput = Schema.Struct({
   type: Info.fields.type,
   branch: Info.fields.branch,
   projectID: ProjectV2.ID,
+  name: Schema.optional(Info.fields.name),
   extra: Schema.optional(Info.fields.extra),
 })
 export type CreateInput = Schema.Schema.Type<typeof CreateInput>
@@ -72,6 +73,7 @@ export const SessionWarpInput = Schema.Struct({
   workspaceID: Schema.NullOr(WorkspaceV2.ID),
   sessionID: SessionID,
   copyChanges: Schema.optional(Schema.Boolean),
+  directory: Schema.optional(Schema.String),
 })
 export type SessionWarpInput = Schema.Schema.Type<typeof SessionWarpInput>
 
@@ -439,8 +441,6 @@ const layer = Layer.effect(
     })
 
     const startSync = Effect.fn("Workspace.startSync")(function* (space: Info) {
-      if (!flags.experimentalWorkspaces) return
-
       const target = yield* WorkspaceAdapterRuntime.target(space).pipe(
         Effect.catch((error) =>
           Effect.gen(function* () {
@@ -460,6 +460,8 @@ const layer = Layer.effect(
         return
       }
 
+      if (!flags.experimentalWorkspaces) return
+
       const exists = yield* FiberMap.has(syncFibers, space.id)
       if (exists && connections.get(space.id)?.status !== "error") return
 
@@ -495,7 +497,7 @@ const layer = Layer.effect(
       const config = yield* WorkspaceAdapterRuntime.configure(adapter, {
         ...input,
         id,
-        name: Slug.create(),
+        name: input.name || Slug.create(),
         directory: null,
         extra: input.extra ?? null,
       })
@@ -621,7 +623,7 @@ const layer = Layer.effect(
         }
 
         if (input.workspaceID === null) {
-          yield* session.setWorkspace({ sessionID: input.sessionID, workspaceID: undefined })
+          yield* session.setWorkspace({ sessionID: input.sessionID, workspaceID: undefined, directory: input.directory })
 
           return
         }

packages/opencode/src/index.ts

@@ -25,6 +25,7 @@ import { EOL } from "os"
 import { WebCommand } from "./cli/cmd/web"
 import { PrCommand } from "./cli/cmd/pr"
 import { SessionCommand } from "./cli/cmd/session"
+import { WorktreeCommand } from "./cli/cmd/worktree"
 import { DbCommand } from "./cli/cmd/db"
 import { errorMessage } from "./util/error"
 import { PluginCommand } from "./cli/cmd/plug"
@@ -80,6 +81,7 @@ const cli = yargs(args)
   .completion("completion", "generate shell completion script")
   .command(AcpCommand)
   .command(McpCommand)
+  .command(WorktreeCommand)
   .command(TuiThreadCommand)
   .command(AttachCommand)
   .command(RunCommand)

packages/opencode/src/project/vcs.ts

@@ -278,6 +278,11 @@ export class PatchApplyError extends Schema.TaggedErrorClass<PatchApplyError>()(
   reason: Schema.Literals(["non-git", "not-clean"]),
 }) {}
 
+export const StashInput = Schema.Struct({
+  message: Schema.String,
+})
+export type StashInput = Schema.Schema.Type<typeof StashInput>
+
 export interface Interface {
   readonly init: () => Effect.Effect<void>
   readonly branch: () => Effect.Effect<string | undefined>
@@ -286,6 +291,8 @@ export interface Interface {
   readonly diff: (mode: Mode, options?: DiffOptions) => Effect.Effect<FileDiff[]>
   readonly diffRaw: () => Effect.Effect<string>
   readonly apply: (input: ApplyInput) => Effect.Effect<ApplyResult, PatchApplyError>
+  readonly stash: (input: StashInput) => Effect.Effect<void>
+  readonly stashPop: (input: StashInput) => Effect.Effect<boolean>
 }
 
 interface State {
@@ -414,6 +421,28 @@ const layer: Layer.Layer<Service, never, Git.Service | EventV2Bridge.Service> =
         }
         return { applied: true }
       }),
+      stash: Effect.fn("Vcs.stash")(function* (input: StashInput) {
+        const ctx = yield* InstanceState.context
+        if (ctx.project.vcs !== "git") return
+        yield* git.run(["stash", "push", "-m", input.message], { cwd: ctx.directory })
+      }),
+      stashPop: Effect.fn("Vcs.stashPop")(function* (input: StashInput) {
+        const ctx = yield* InstanceState.context
+        if (ctx.project.vcs !== "git") return false
+        const list = yield* git.run(["stash", "list"], { cwd: ctx.directory })
+        const entry = list
+          .text()
+          .split(/\r?\n/)
+          .find((line) => {
+            const parts = line.split(": ")
+            const message = parts.slice(2).join(": ")
+            return message === input.message
+          })
+        const ref = entry?.split(":")[0]
+        if (!ref) return false
+        yield* git.run(["stash", "pop", ref], { cwd: ctx.directory })
+        return true
+      }),
     })
   }),
 )

packages/opencode/src/server/routes/instance/httpapi/groups/instance.ts

@@ -40,6 +40,16 @@ export class ApiVcsApplyError extends Schema.ErrorClass<ApiVcsApplyError>("VcsAp
   { httpApiStatus: 400 },
 ) {}
 
+export class ApiVcsStashError extends Schema.ErrorClass<ApiVcsStashError>("VcsStashError")(
+  {
+    name: Schema.Literal("VcsStashError"),
+    data: Schema.Struct({
+      message: Schema.String,
+    }),
+  },
+  { httpApiStatus: 400 },
+) {}
+
 export const InstancePaths = {
   dispose: "/instance/dispose",
   path: "/path",
@@ -48,6 +58,8 @@ export const InstancePaths = {
   vcsDiff: "/vcs/diff",
   vcsDiffRaw: "/vcs/diff/raw",
   vcsApply: "/vcs/apply",
+  vcsStash: "/vcs/stash",
+  vcsStashPop: "/vcs/stash-pop",
   command: "/command",
   agent: "/agent",
   skill: "/skill",
@@ -136,6 +148,30 @@ export const InstanceApi = HttpApi.make("instance")
             description: "Apply a raw patch to the current working tree.",
           }),
         ),
+        HttpApiEndpoint.post("vcsStash", InstancePaths.vcsStash, {
+          query: WorkspaceRoutingQuery,
+          payload: Vcs.StashInput,
+          success: described(HttpApiSchema.NoContent, "Changes stashed"),
+          error: ApiVcsStashError,
+        }).annotateMerge(
+          OpenApi.annotations({
+            identifier: "vcs.stash",
+            summary: "Stash changes",
+            description: "Stash uncommitted changes with a message.",
+          }),
+        ),
+        HttpApiEndpoint.post("vcsStashPop", InstancePaths.vcsStashPop, {
+          query: WorkspaceRoutingQuery,
+          payload: Vcs.StashInput,
+          success: described(Schema.Boolean, "Stash popped"),
+          error: ApiVcsStashError,
+        }).annotateMerge(
+          OpenApi.annotations({
+            identifier: "vcs.stashPop",
+            summary: "Pop stashed changes",
+            description: "Pop a stash with a matching message.",
+          }),
+        ),
         HttpApiEndpoint.get("command", InstancePaths.command, {
           query: WorkspaceRoutingQuery,
           success: described(Schema.Array(Command.Info), "List of commands"),

packages/opencode/src/server/routes/instance/httpapi/groups/workspace.ts

@@ -15,6 +15,7 @@ export const WarpPayload = Schema.Struct({
   id: Schema.NullOr(Workspace.Info.fields.id),
   sessionID: Workspace.SessionWarpInput.fields.sessionID,
   copyChanges: Workspace.SessionWarpInput.fields.copyChanges,
+  directory: Workspace.SessionWarpInput.fields.directory,
 })
 
 export class ApiWorkspaceWarpError extends Schema.ErrorClass<ApiWorkspaceWarpError>("WorkspaceWarpError")(