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+The graphlemon planner workflow finished. No files were created or modified — this run only produced a PRD document (returned as content, not written to disk; persisting it is left to a downstream step).
+
+**PRD summary: add a one-line boundary comment to `_LOOP_LIMIT` in `src/org_loop_route.py`**
+
+- The planner verified via Read that `src/org_loop_route.py:38` (`_LOOP_LIMIT = 3`) currently has no adjacent comment, while `route_org_loop()` (lines 102-114) enforces: once `task["loop_round"] >= _LOOP_LIMIT`, the task is forced into `blocked_pending_human` (with `blocked_reason = 'loop_limit_reached'`, raising `LoopLimitReachedError`).
+- Scope: insert exactly one comment line directly above `_LOOP_LIMIT = 3`, mentioning `loop_round`, `_LOOP_LIMIT`, `blocked_pending_human`, and REQ-05/REQ-09 (`docs/sdd/06-验收与测试锚点.md`). No logic, values, or other files change.
+- Suggested single-line comment: `# loop_round boundary: loop_round >= _LOOP_LIMIT forces blocked_pending_human (REQ-05/REQ-09, docs/sdd/06-验收与测试锚点.md).`
+- Definition of Done: exactly 1 file changed, exactly 1 line added (0 removed/modified), all five keywords present, comment placed with no blank line before the constant, rest of file byte-identical.
+- No new tests required (comment-only change); if a test suite for this module exists it should still pass (none was found yet at this PH0 stage).
+
+This is a very small, low-risk task ready to move to SDD/implementation. Let me know if you'd like me to proceed with writing the actual code change.
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