Add project-aware chat startup defaults

Make repo-root chat startup native by letting MCP servers carry a default project source for workspace creation. When a chat host starts from a Git checkout, workspace_create can now omit seed_path and inherit the server startup source; explicit --project-path and clean-clone --repo-url/--repo-ref paths are supported as fallbacks.

Add project startup resolution and materialization, surface origin_kind/origin_ref in workspace_seed, update chat-host docs and the repro/fix smoke to use project-aware workspace creation, and switch dist-check to uv run pyro so verification stays stable after uv reinstalls.

Validated with uv lock, focused startup/server/CLI pytest coverage, UV_CACHE_DIR=.uv-cache make check, UV_CACHE_DIR=.uv-cache make dist-check, and real guest-backed smokes for both explicit project_path and bare repo-root auto-detection.

examples/claude_code_mcp.md

@@ -9,6 +9,9 @@ claude mcp add pyro -- uvx --from pyro-mcp pyro mcp serve
 claude mcp list
 ```
 
+Run that from the repo root when you want the first `workspace_create` to start
+from the current checkout automatically.
+
 Already installed:
 
 ```bash
@@ -16,6 +19,13 @@ claude mcp add pyro -- pyro mcp serve
 claude mcp list
 ```
 
+If Claude Code launches the server from an unexpected cwd, pin the project
+explicitly:
+
+```bash
+claude mcp add pyro -- uvx --from pyro-mcp pyro mcp serve --project-path /abs/path/to/repo
+```
+
 Move to `workspace-full` only when the chat truly needs shells, services,
 snapshots, secrets, network policy, or disk tools:
 

examples/codex_mcp.md

@@ -9,6 +9,9 @@ codex mcp add pyro -- uvx --from pyro-mcp pyro mcp serve
 codex mcp list
 ```
 
+Run that from the repo root when you want the first `workspace_create` to start
+from the current checkout automatically.
+
 Already installed:
 
 ```bash
@@ -16,6 +19,13 @@ codex mcp add pyro -- pyro mcp serve
 codex mcp list
 ```
 
+If Codex launches the server from an unexpected cwd, pin the project
+explicitly:
+
+```bash
+codex mcp add pyro -- uvx --from pyro-mcp pyro mcp serve --project-path /abs/path/to/repo
+```
+
 Move to `workspace-full` only when the chat truly needs shells, services,
 snapshots, secrets, network policy, or disk tools:
 

examples/mcp_client_config.md

@@ -39,6 +39,10 @@ If `pyro-mcp` is already installed locally, the same server can be configured wi
 }
 ```
 
+If the host does not preserve the server working directory and you want the
+first `workspace_create` to start from a specific checkout, add
+`"--project-path", "/abs/path/to/repo"` after `"serve"` in the same args list.
+
 Profile progression:
 
 - `workspace-core`: the default and recommended first persistent chat profile