## Summary

- Adds planner tools that read and atomically revise draft implementation graphs against both plan and graph revisions. - Blocks preparation until questionnaires are answered, accepted comments are reflected in the plan, and the supplied plan revision is current. - Keeps graph persistence and preparation policy in the Tasks boundary; plan prose, graph drafting, and human approval/locking remain separate. - Covers graph operation batches and drafting from a hosted planner turn.

## Stack

Built directly on #44.

## Verification

- `bun run types` - `bun run ci` - `bun test` — 763 pass, 2 expected PostgreSQL skips - `bun run e2e` - `git diff --check`