The graphlemon Work Node (planner) workflow finished. It produced a PRD for a small, well-scoped change:

**Task:** Add a one-line rationale comment above `_BUSY_TIMEOUT_MS = 30000` in `src/scheduler.py`, pointing to the existing sqlite concurrent-writer/busy-timeout rationale that's currently only documented in the module docstring (lines 21-28).

Key points from the PRD:
- Single-line insertion only — no value change, no other file touched
- Acceptance criteria are verifiable via `git diff` alone (single added line, no deletions/modifications elsewhere)
- Marked trivial/cosmetic risk — no test coverage required
- Exact comment wording left to the Code Agent, constrained to reference the sqlite retry-on-lock behavior and point back to the docstring

No code changes have been made yet — this was the planning step only. Next step (pending user direction) would be to implement it via the Coder agent/build workflow.