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+The graphlemon Work Node (planner) workflow completed. It investigated src/scheduler.py, confirmed line 78 (`_BUSY_TIMEOUT_MS = 30000`) has no rationale comment above it, and produced an SDD (no code written, per planner scope) specifying: add exactly one comment line above that constant explaining the sqlite busy-timeout/concurrent-writer retry rationale, cross-referencing (not duplicating) the existing module docstring explanation at lines 21-28. Scope is single-file, single-line, comment-only — no M/V/C/P change, no test needed. Done criterion: `git diff` shows exactly one added line in src/scheduler.py, positioned directly above the constant. This SDD is ready to hand to the Coder node if the actual edit should be applied next.
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