fix(workspace): keep the default Workspace path language-neutral

The first-use directory name and its stored title came from the Client's
startup language, so one product decision carried two incompatible
requirements: a path addressed by shell commands, tool arguments, @path
references, and session logs, and a label a reader reads.

The controller now owns the fixed `default-workspace` directory name and
the registry titles the Workspace after that same segment, so
`workspace.initializeDefault` takes no request at all —
WorkspaceInitializeDefaultRequest and its name validation are gone, and
the registry resolver returns a path instead of a path and title. No
language reaches the Host.

Browser consumers label a Workspace through the new
`workspaceDisplayTitle`: a title still equal to the automatic one reads
as the localized default name from the `common` namespace, every other
title reads verbatim. The Workspace browser resolves it once at the store
read, so rows, hover card, search meta, and the rename and delete dialogs
inherit it; the hero picker and the Conversation chip resolve it too.
Confirming a rename stores the text on screen, which is what stops a row
following the language.

packages/api/workspace-controller/src/client/index.ts

@@ -19,7 +19,7 @@ export { WorkspaceArchiveError, WorkspaceController, WorkspaceCreateError } from
 export type { IWorkspaces, WorkspaceSource } from './service.ts'
 export type {
   SessionActivity, SessionActivityItem, SessionActivityKind, SessionActivityKindMap, WorkspaceId,
-  WorkspaceInitializeDefaultRequest, WorkspaceView,
+  WorkspaceView,
 } from '../types.ts'
 
 type WorkspaceBaselineFrame = Extract<WorkspaceFollowFrame, { type: 'baseline' }>

packages/api/workspace-controller/src/client/model.ts

@@ -12,7 +12,6 @@ import type {
   WorkspaceCreateValue,
   WorkspaceDeleteValue,
   WorkspaceInsertSessionBeforeRequest,
-  WorkspaceInitializeDefaultRequest,
   WorkspaceOrderValue,
   WorkspacePinSessionRequest,
   WorkspacePinValue,
@@ -104,14 +103,11 @@ export class ClientWorkspaceModel implements WorkspaceFollowSink {
 
   /**
    * Initialize the default Workspace and merge its authoritative row.
-   * @param request - initial directory name and title.
    * @param signal - caller lifetime.
    * @returns generated Remote result.
    */
-  async initializeDefault(
-    request: WorkspaceInitializeDefaultRequest, signal?: AbortSignal,
-  ): Promise<RemoteResult<WorkspaceValue | undefined>> {
-    const result = await this.remote.initializeDefault(request, signal)
+  async initializeDefault(signal?: AbortSignal): Promise<RemoteResult<WorkspaceValue | undefined>> {
+    const result = await this.remote.initializeDefault(signal)
     if (result.ok && result.value !== undefined) this.upsert(result.value.workspace)
     return result
   }

packages/api/workspace-controller/src/client/service.ts

@@ -4,7 +4,7 @@ import { Service, type Context } from '@deepseek-ai/cordis'
 import type { SessionId } from '@deepseek-ai/dsh-session/types'
 import type { RemoteFailure } from '@deepseek-ai/dsh-typert-protocol'
 import type { WorkspaceId } from '@deepseek-ai/dsh-workspace/types'
-import type { WorkspaceInitializeDefaultRequest, WorkspaceView } from '../types.ts'
+import type { WorkspaceView } from '../types.ts'
 import type { ClientWorkspaceModel, WorkspaceSnapshot } from './model.ts'
 
 /** Structured create failure for callers that distinguish Host business errors. */
@@ -55,11 +55,10 @@ export interface IWorkspaces {
   create(input: { path: string }): Promise<WorkspaceView>
   /**
    * Initialize or reuse the default Workspace.
-   * @param request - initial directory name and title.
    * @param signal - caller lifetime.
    * @returns the prepared Workspace, or undefined when first-use initialization is ineligible; rejects on preparation failure.
    */
-  initializeDefault(request: WorkspaceInitializeDefaultRequest, signal?: AbortSignal): Promise<WorkspaceView | undefined>
+  initializeDefault(signal?: AbortSignal): Promise<WorkspaceView | undefined>
   /**
    * Rename a Workspace.
    * @param workspaceId - target Workspace.
@@ -134,8 +133,8 @@ export class WorkspaceController extends Service implements IWorkspaces {
     return result.value.workspace
   }
 
-  async initializeDefault(request: WorkspaceInitializeDefaultRequest, signal?: AbortSignal): Promise<WorkspaceView | undefined> {
-    const result = await this.model.initializeDefault(request, signal)
+  async initializeDefault(signal?: AbortSignal): Promise<WorkspaceView | undefined> {
+    const result = await this.model.initializeDefault(signal)
     if (!result.ok) throw new WorkspaceCreateError(result.error)
     return result.value?.workspace
   }

packages/api/workspace-controller/src/default-directory.ts

@@ -3,6 +3,7 @@
 import { homedir } from 'node:os'
 import { posix, win32 } from 'node:path'
 import { runNativeCommand, type NativeCommandRunner } from '@deepseek-ai/dsh-native-command'
+import { DEFAULT_WORKSPACE_DIRECTORY } from './default-workspace.ts'
 
 /** Platform observations replaceable in directory-resolution tests. */
 interface DocumentsDirectoryInternals {
@@ -28,14 +29,12 @@ export function validateDocumentsDirectory(directory: string, platform: NodeJS.P
 
 /**
  * Resolve the first-use directory on the Host without creating files.
- * @param directoryName - validated single directory name supplied by the Client.
  * @param documentsDirectory - explicit deployment override for the system Documents directory.
  * @param signal - caller lifetime and lookup deadline.
  * @param internals - platform facts and native command runner.
  * @returns the absolute candidate path.
  */
 export async function defaultWorkspaceDirectory(
-  directoryName: string,
   documentsDirectory: string | undefined,
   signal: AbortSignal,
   internals: DocumentsDirectoryInternals = {},
@@ -75,5 +74,5 @@ export async function defaultWorkspaceDirectory(
   }
   directory = validateDocumentsDirectory(directory, platform)
   signal.throwIfAborted()
-  return paths.join(directory, 'deepseek-harness', directoryName)
+  return paths.join(directory, 'deepseek-harness', DEFAULT_WORKSPACE_DIRECTORY)
 }

packages/api/workspace-controller/src/default-workspace.ts

@@ -0,0 +1,30 @@
+/**
+ * Fixed first-use Workspace naming, shared by the Host that creates the
+ * directory and by browser consumers that label the resulting row. A pure fold
+ * with no imports, so client bundles inline it instead of requesting a
+ * module-table row this package does not publish.
+ * @module @deepseek-ai/dsh-api-workspace-controller/default-workspace
+ */
+
+/**
+ * Leaf directory name of the first-use Workspace under
+ * `<Documents>/deepseek-harness`. Language-neutral, so one installation keeps
+ * one on-disk path across language switches. The registry derives the initial
+ * title from this same segment, which is the title
+ * {@link workspaceDisplayTitle} recognizes as automatic.
+ */
+export const DEFAULT_WORKSPACE_DIRECTORY = 'default-workspace'
+
+/**
+ * The text one Workspace is labeled with. A Workspace still carrying the
+ * automatic first-use title reads as the caller's localized default name; every
+ * other title reads verbatim in every language. A title the user typed as
+ * exactly {@link DEFAULT_WORKSPACE_DIRECTORY} is labeled as the default too;
+ * nothing else depends on the distinction.
+ * @param title - stored Workspace title.
+ * @param localizedDefault - the default Workspace name in the active language.
+ * @returns the title to display.
+ */
+export function workspaceDisplayTitle(title: string, localizedDefault: string): string {
+  return title === DEFAULT_WORKSPACE_DIRECTORY ? localizedDefault : title
+}

packages/api/workspace-controller/src/index.ts

@@ -2,7 +2,7 @@
 
 import { Context } from '@deepseek-ai/cordis'
 import z from '@deepseek-ai/schemastery'
-import { Remote, RemoteError, TypertRemoteService } from '@deepseek-ai/dsh-typert-protocol'
+import { Remote, TypertRemoteService } from '@deepseek-ai/dsh-typert-protocol'
 import { WorkspaceCommands } from './commands.ts'
 import { DirectoryPickerController } from './directory-picker.ts'
 import { WorkspaceFeed, workspaceView } from './feed.ts'
@@ -16,7 +16,6 @@ import type {
   WorkspaceDeleteValue,
   WorkspaceFollowFrame,
   WorkspaceInsertBeforeRequest,
-  WorkspaceInitializeDefaultRequest,
   WorkspaceInsertSessionBeforeRequest,
   WorkspaceOrderValue,
   WorkspacePinSessionRequest,
@@ -89,24 +88,20 @@ export class WorkspaceController extends TypertRemoteService {
   }
 
   /**
-   * Initialize or reuse the default Workspace during first-use startup.
-   * @param request - initial directory name and title; never rename an existing default.
+   * Initialize or reuse the default Workspace during first-use startup. The
+   * directory name is fixed, so the Host never renames or relocates an
+   * existing default; its initial title is that same name, which browser
+   * consumers label in the reader's language.
    * @param signal - caller lifetime; cancels native directory lookup.
    * @returns the durable Workspace, or undefined when first-use initialization is ineligible; creates no Session or message.
    */
   @Remote('initializeDefault')
-  async initializeDefault(request: WorkspaceInitializeDefaultRequest, signal: AbortSignal): Promise<WorkspaceValue | undefined> {
-    const { directoryName, title } = request
-    if (directoryName.trim() === '' || directoryName !== directoryName.trim()
-      || directoryName.endsWith('.') || /[/\\:\0]/.test(directoryName) || title.trim() === '') {
-      throw new RemoteError('gateway/bad-request', 'default Workspace requires a directory name and non-blank title', {})
-    }
+  async initializeDefault(signal: AbortSignal): Promise<WorkspaceValue | undefined> {
     const workspace = await this.ctx.workspaceRegistry.initializeDefault(async () => {
       const timeout = AbortSignal.timeout(this.config.documentsLookupTimeoutMs)
-      const path = await defaultWorkspaceDirectory(
-        directoryName, this.config.documentsDirectory, AbortSignal.any([signal, timeout]),
+      return await defaultWorkspaceDirectory(
+        this.config.documentsDirectory, AbortSignal.any([signal, timeout]),
       )
-      return { path, title }
     })
     return workspace === undefined ? undefined : { workspace: workspaceView(workspace) }
   }

packages/api/workspace-controller/src/types.ts

@@ -66,14 +66,6 @@ export interface WorkspaceCreateRequest {
   readonly path: string
 }
 
-/** Names chosen by the first-use Client before default Workspace initialization. */
-export interface WorkspaceInitializeDefaultRequest {
-  /** Host rejects blank names, separators, colon, NUL, surrounding whitespace, and trailing dots; OS filename restrictions also apply. */
-  readonly directoryName: string
-  /** Initial display title, retained across language changes. */
-  readonly title: string
-}
-
 /** Created or previously registered Workspace. */
 export interface WorkspaceCreateValue {
   readonly workspace: WorkspaceView