Allow same-basename Workspace paths

packages/workspace/workspace/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/workspace/workspace/README.md
-README.md: 11dc8172392e530ab4ea16f1b60473e5befb8089
-README.zh.md: 5c6e3cefe31759df27b8008861505527648ce3c4
+README.md: bfa044de50fc71dca95637487df50dc551d40e1b
+README.zh.md: 1711e4d90c4cc62cf6e18a6868cd362a2c2e9458

packages/workspace/workspace/README.md

@@ -8,7 +8,7 @@ The entity/storage rationale lives in the [domain Agent Note](../../../.agents/n
 
 ## Shape
 
-- `ctx.workspace.create(path, title?)` — canonicalizes `path` via `fs.realpath`, rejects a nonexistent or non-directory path, creates at most one record per canonical path, and prepends a new record to durable workspace order. Repeated calls for that path return the existing workspace without changing its title; a different path cannot create a duplicate title.
+- `ctx.workspace.create(path, title?)` — canonicalizes `path` via `fs.realpath`, rejects a nonexistent or non-directory path, creates at most one record per canonical path, and prepends a new record to durable workspace order. Repeated calls for that path return the existing workspace without changing its title; different paths may share a display title.
 - `ctx.workspace.get(id)` / `list()` / `resolveByPath(path)` — cache-served lookups. `list()` is synchronous and follows durable registry order; `resolveByPath` is async because it applies the same `realpath` canon and rejects a missing path rather than creating it.
 - `ctx.workspace.delete(id)` — removes only the Workspace registration, its durable order entry, and its session account. Unknown ids return `false`; a removed record returns `true`. The directory, user files, live Sessions, and persisted session logs are never touched, so those Sessions become Ungrouped. A table-write failure restores the prior order and published entity.
 - `Workspace.attachSession(id)` — validates a live or persisted session header cwd against the workspace path and prepends a new id. Unknown sessions, absent/unresolvable/non-directory cwd values, and mismatches reject without writing. `detachSession` removes only the candidate index entry.

packages/workspace/workspace/README.zh.md

@@ -8,7 +8,7 @@ DeepSeek Harness 的 Workspace 实体注册表（`ctx.workspace`）：通过领
 
 ## 结构
 
-- `ctx.workspace.create(path, title?)`：规范化 `path` 时使用 `fs.realpath`，拒绝不存在或非目录的路径，每个规范路径最多创建一条记录，并将新记录前置到持久 workspace 顺序。对同一路径重复调用会返回现有 workspace，且不改变其标题；不同路径不能创建重复标题。
+- `ctx.workspace.create(path, title?)`：规范化 `path` 时使用 `fs.realpath`，拒绝不存在或非目录的路径，每个规范路径最多创建一条记录，并将新记录前置到持久 workspace 顺序。对同一路径重复调用会返回现有 workspace，且不改变其标题；不同路径可以共用显示标题。
 - `ctx.workspace.get(id)`/`list()`/`resolveByPath(path)`：由缓存提供的查找。`list()` 为同步操作，并遵循持久注册表顺序；`resolveByPath` 为异步操作，因为它采用相同的 `realpath` 规范化方式，并会拒绝缺失路径，而不是创建路径。
 - `ctx.workspace.delete(id)`：只移除 Workspace 注册记录、对应的持久顺序条目及会话归属记录。未知 id 返回 `false`，成功移除记录则返回 `true`。目录、用户文件、活跃会话和持久化会话日志绝不受影响，因此相关会话会进入 Ungrouped。表写入失败时会恢复原顺序和此前发布的实体。
 - `Workspace.attachSession(id)`：对照 workspace 路径验证实时或已持久化的会话头 cwd，并将新 id 前置。未知会话、缺失／无法解析／非目录的 cwd 值和不匹配情况都会在不写入的前提下被拒绝。`detachSession` 只移除候选索引条目。

packages/workspace/workspace/src/index.ts

@@ -38,17 +38,6 @@ export function WorkspaceId(id: string): WorkspaceId {
   return id as WorkspaceId
 }
 
-/** A create request would give two Workspaces the same display name. */
-export class WorkspaceNameConflictError extends Error {
-  /**
-   * @param workspaceName - Conflicting display name.
-   */
-  constructor(readonly workspaceName: string) {
-    super(`workspace name '${workspaceName}' is already in use`)
-    this.name = 'WorkspaceNameConflictError'
-  }
-}
-
 /**
  * An archiveSession request named a session neither live nor in session
  * persistence — a definite miss only; storage faults propagate as themselves.
@@ -145,7 +134,7 @@ export class WorkspaceRegistry extends Service {
    * original error and a non-directory rejects. Repeated calls for the same
    * canonical path return the existing entity without changing its title.
    * A newly created workspace is prepended to the durable registry order.
-   * A different canonical path cannot create a duplicate display title.
+   * Different canonical paths may share a display title.
    * @param path - Existing directory to own, in any path spelling.
    * @param title - Display title used only when a new record is created.
    * @returns the existing or newly durable workspace.
@@ -259,10 +248,6 @@ export class WorkspaceRegistry extends Service {
     }
 
     const workspaceName = title ?? basename(canonical)
-    if ([...this.entities.values()].some(entity => entity.title === workspaceName)) {
-      throw new WorkspaceNameConflictError(workspaceName)
-    }
-
     const table = this.requireTable()
     const state = this.requireState()
     const id = WorkspaceId(randomUUID())

packages/workspace/workspace/tests/workspace.spec.ts

@@ -10,7 +10,7 @@ import type { DomainChanged } from '@deepseek-ai/dsh-storage-domain'
 import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
 import type { SessionHeader } from '@deepseek-ai/dsh-session'
 import { MemoryMediaPool, MemoryStorageBackend } from '../../../storage/storage-domain/tests/helpers/memory-backend.ts'
-import WorkspaceRegistry, { WorkspaceId, WorkspaceMoveInvalidError, WorkspaceNameConflictError } from '../src/index.ts'
+import WorkspaceRegistry, { WorkspaceId, WorkspaceMoveInvalidError } from '../src/index.ts'
 import type { WorkspaceDomainState, WorkspaceRecord } from '../src/index.ts'
 
 const DOMAIN_VERSION = 2
@@ -377,17 +377,15 @@ describe('WorkspaceRegistry create and lookup', () => {
     expect(pool.media.get('workspace')!.tables.get('workspaces')!.size).toBe(1)
   })
 
-  it('rejects a duplicate display name on a different canonical path', async () => {
+  it('allows a duplicate display name on a different canonical path', async () => {
     const firstDir = await makeDir('named-first')
     const secondDir = await makeDir('named-second')
     const { registry } = await harness()
-    await registry.create(firstDir, 'Shared')
-    await expect(registry.create(secondDir, 'Shared')).rejects.toEqual(
-      expect.objectContaining<Partial<WorkspaceNameConflictError>>({
-        workspaceName: 'Shared',
-      }),
-    )
-    expect(registry.list()).toHaveLength(1)
+    const first = await registry.create(firstDir, 'Shared')
+    const second = await registry.create(secondDir, 'Shared')
+    expect(first.title).toBe('Shared')
+    expect(second.title).toBe('Shared')
+    expect(registry.list()).toEqual([second, first])
   })
 
   it('rejects nonexistent and non-directory paths without changing order', async () => {