v0.11.0 - local canvas versions

Released 2026-08-07.

New: local canvas version control

Preview runs can create immutable named versions from committed decisions.
timeline() combines decisions and named versions in timestamp order, while state_at() replays historical state without mutating the active run.
fork() derives an independent linear run from a selected historical round so exploration does not rewrite the source history.
Anchor v2 records stable node identity and structural features for more reliable feedback targeting.

Preview writes are serialized across processes for the full transaction, including projection updates.
Confirmation binds to the exact rendered candidate and fails closed when state changes or validation cannot be completed.
Append-only decision and version records use atomic replacement and explicit committed-versus-projection failure semantics, preventing unsafe retries after durable commits.
Prototype HTML and path modes are explicit, and browser-side undo preserves native comment editing while correctly removing canvas anchors.

Installable inventory remains 8 model skills, 4 commands, and 2 bundled MCP servers.
The Preview MCP package now includes local version projections and the hardened transaction path.
CI requires Chromium-backed canvas version-control end-to-end coverage.

Release functional gates passed: version consistency, static validation, run seam, adapter floor self-check, and tag availability.
python -m pytest -q: 183 tests passed, plus 67 subtests.
npm pack --dry-run: design-playbook@0.11.0, 53 files, 122.8 kB packed / 461.0 kB unpacked.