Complete the 2.6.0 workspace milestone by adding explicit host-out export and immutable-baseline diff across the CLI, Python SDK, and MCP server.
Capture a baseline archive at workspace creation, export live /workspace paths through the guest agent, and compute structured whole-workspace diffs on the host without affecting command logs or shell state. The docs, roadmap, bundled guest agent, and workspace example now reflect the new create -> sync -> diff -> export workflow.
Validation: uv lock, UV_CACHE_DIR=.uv-cache make check, UV_CACHE_DIR=.uv-cache make dist-check, and a real guest-backed Firecracker smoke covering workspace create, sync push, diff, export, and delete.
Rewrite the user-facing persistent sandbox story around pyro workspace ..., including the install guide, first-run transcript, integrations notes, and public contract reference.
Rename the Python example to examples/python_workspace.py and update the docs to use the new workspace create, sync, exec, status, logs, and delete flows with seed_path/workspace_id terminology.
Mark the 2.4.0 workspace-contract pivot as done in the roadmap now that the shipped CLI, SDK, MCP, docs, and tests all use the workspace-first surface.
