The planner workflow (graphlemon-node-156131d6fa4b4d17b3e8bed6471f3fd9) completed successfully.

**Task identified:** `src/org_loop_route.py` is missing a comment above `_LOOP_LIMIT = 3` (line 38) explaining that this constant implements the REQ-05/REQ-09 loop-round boundary (`docs/sdd/06-验收与测试锚点.md`) — when `loop_round >= _LOOP_LIMIT`, the task must transition to `blocked_pending_human`.

**Produced SDD (single Development Unit, DU-01):**
- Scope: add exactly one comment line directly above `_LOOP_LIMIT = 3`; no logic changes, no new tests.
- Proposed comment: `# REQ-05/REQ-09 (docs/sdd/06-验收与测试锚点.md) loop_round boundary: loop_round >= _LOOP_LIMIT forces task.status -> blocked_pending_human.`
- Non-goals explicitly exclude touching `route_org_loop`, existing tests, or the module docstring.
- Acceptance criteria: diff touches only that file, exactly 1 line added / 0 removed, and `python3 -m unittest src.test_org_loop_route` still passes fully (regression proof, no new tests needed).
- Cross-checked against an existing memory of a prior "loop_round off-by-one" bug — confirmed this is unrelated, not duplicate work.

This was a planning-only run — no code was changed. Ready to hand off to the Coder step to apply the one-line comment if desired.