Workflow completed. The Planner concluded — for the 5th confirmed time — that the `_LOOP_LIMIT` boundary comment in `src/org_loop_route.py:38` already exists and correctly documents the `loop_round >= _LOOP_LIMIT` → `blocked_pending_human` semantics, backed by an existing passing regression test (`src/test_org_loop_route.py:95`, `LoopLimitTest.test_third_route_attempt_at_limit_blocks_and_raises`).

No code change was made or needed. Instead of re-fabricating a diff, the workflow produced a verification-only Benchmark: concrete grep/sed/unittest checks plus scope guards (G1–G4) that would fail any diff touching more than a single comment line, so future Coder/Validator runs have a cheap pass/fail check instead of re-deriving the investigation.

I updated the persistent memory note (project_loop_round_comment_already_present.md) to record this as the 5th confirmation and to flag that the Org Graph task lifecycle (p_org_task_lifecycle, 04-P) still lacks a terminal state for "investigated, confirmed already satisfied, zero-diff" — which is why this task keeps resurfacing instead of closing. That lifecycle gap is a process/design issue for whoever owns Org Graph task-state transitions, not something to fix by editing org_loop_route.py.