Add workspace naming and discovery

Make concurrent workspaces easier to rediscover and resume without relying on opaque IDs alone.

Add optional workspace names, key/value labels, workspace list, and workspace update across the CLI, Python SDK, and MCP surface, and persist last_activity_at so list ordering reflects real mutating activity.

Update the stable contract, install/first-run docs, roadmap, and Python workspace example to teach the new discovery flow, and validate it with focused manager/CLI/API/server coverage plus uv lock, make check, make dist-check, and a real multi-workspace smoke for create, list, update, exec, reorder, and delete.

docs/roadmap/llm-chat-ergonomics.md

@@ -6,7 +6,7 @@ goal:
 make the core agent-workspace use cases feel trivial from a chat-driven LLM
 interface.
 
-Current baseline is `3.2.0`:
+Current baseline is `3.3.0`:
 
 - the stable workspace contract exists across CLI, SDK, and MCP
 - one-shot `pyro run` still exists as the narrow entrypoint
@@ -46,7 +46,7 @@ More concretely, the model should not need to:
 ## Milestones
 
 1. [`3.2.0` Model-Native Workspace File Ops](llm-chat-ergonomics/3.2.0-model-native-workspace-file-ops.md) - Done
-2. [`3.3.0` Workspace Naming And Discovery](llm-chat-ergonomics/3.3.0-workspace-naming-and-discovery.md)
+2. [`3.3.0` Workspace Naming And Discovery](llm-chat-ergonomics/3.3.0-workspace-naming-and-discovery.md) - Done
 3. [`3.4.0` Tool Profiles And Canonical Chat Flows](llm-chat-ergonomics/3.4.0-tool-profiles-and-canonical-chat-flows.md)
 4. [`3.5.0` Chat-Friendly Shell Output](llm-chat-ergonomics/3.5.0-chat-friendly-shell-output.md)
 5. [`3.6.0` Use-Case Recipes And Smoke Packs](llm-chat-ergonomics/3.6.0-use-case-recipes-and-smoke-packs.md)
@@ -55,6 +55,9 @@ Completed so far:
 
 - `3.2.0` added model-native `workspace file *` and `workspace patch apply` so chat-driven agents
   can inspect and edit `/workspace` without shell-escaped file mutation flows.
+- `3.3.0` added workspace names, key/value labels, `workspace list`, `workspace update`, and
+  `last_activity_at` tracking so humans and chat-driven agents can rediscover and resume the right
+  workspace without external notes.
 
 ## Expected Outcome
 

docs/roadmap/llm-chat-ergonomics/3.3.0-workspace-naming-and-discovery.md

@@ -1,6 +1,6 @@
 # `3.3.0` Workspace Naming And Discovery
 
-Status: Planned
+Status: Done
 
 ## Goal
 
@@ -50,3 +50,4 @@ Planned additions:
 - README and install docs that show parallel named workspaces
 - examples that demonstrate issue-oriented workspace naming
 - smoke coverage for at least one multi-workspace flow
+- public contract, CLI help, and examples that show `workspace list` and `workspace update`