docs: verify #650 already implemented on main

Add a verification note and regression test proving the pipeline daily reset
is already wired on main via reset_pipeline_state.py, nightly scheduler
integration, and midnight cron configuration.

docs/issue-650-verification.md

@@ -0,0 +1,42 @@
+# Issue #650 Verification
+
+Status: already implemented on `main`
+
+Issue: `[Pipeline] pipeline_state.json needs daily reset`
+
+Summary:
+The repo already contains the full daily-reset implementation for `pipeline_state.json`.
+Yesterday's complete/failed states are reset by age, stuck running states older than 6 hours are cleared, the nightly scheduler calls the reset helper before each cycle, and a dedicated midnight cron entry runs the reset script against `~/.hermes/pipeline_state.json`.
+
+Evidence on `main`:
+- `scripts/reset_pipeline_state.py`
+  - removes stale `complete` and `failed` entries older than 24 hours
+  - removes stale `running` entries older than 6 hours
+  - supports direct execution against `~/.hermes/pipeline_state.json`
+- `scripts/test_reset_pipeline_state.py`
+  - covers fresh vs stale complete entries
+  - covers stale failed entries
+  - covers stuck running entries
+  - passes on a fresh clone
+- `scripts/nightly-pipeline-scheduler.sh`
+  - calls `reset_pipeline_state.py` before pipeline scheduling
+  - treats stale completion state as not reusable forever
+- `cron/pipeline-daily-reset.yml`
+  - schedules a midnight daily reset using `python3 scripts/reset_pipeline_state.py --state-file ~/.hermes/pipeline_state.json`
+
+Verification commands run:
+- `python3 scripts/test_reset_pipeline_state.py`
+- `bash -n scripts/nightly-pipeline-scheduler.sh`
+- `python3 -m py_compile scripts/reset_pipeline_state.py`
+
+Result:
+- reset script tests passed
+- scheduler shell syntax check passed
+- reset script compiled cleanly
+
+Additional trail:
+- issue comment references closed PR #676 describing timestamp-based staleness logic
+- current `main` already contains the reset helper, scheduler integration, tests, and cron wiring
+
+Recommendation:
+Close issue #650 as already implemented on `main`.

tests/test_issue_650_pipeline_daily_reset.py

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+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+
+
+def test_issue_650_daily_reset_helper_exists() -> None:
+    helper = REPO_ROOT / "scripts" / "reset_pipeline_state.py"
+    text = helper.read_text()
+
+    assert helper.exists()
+    assert "DEFAULT_COMPLETE_MAX_AGE_HOURS = 24" in text
+    assert "DEFAULT_FAILED_MAX_AGE_HOURS = 24" in text
+    assert "DEFAULT_RUNNING_MAX_AGE_HOURS = 6" in text
+    assert "def reset_pipeline_state(" in text
+
+
+def test_issue_650_scheduler_invokes_reset_helper() -> None:
+    scheduler = (REPO_ROOT / "scripts" / "nightly-pipeline-scheduler.sh").read_text()
+
+    assert 'python3 "$script_dir/reset_pipeline_state.py" --state-file "$STATE_FILE"' in scheduler
+    assert "Reset stale pipeline states from previous days" in scheduler
+    assert "Check staleness: complete from a previous day is stale" in scheduler
+
+
+def test_issue_650_midnight_cron_reset_exists() -> None:
+    cron_def = (REPO_ROOT / "cron" / "pipeline-daily-reset.yml").read_text()
+
+    assert "Pipeline State Daily Reset" in cron_def
+    assert "schedule: '0 0 * * *'" in cron_def
+    assert "python3 scripts/reset_pipeline_state.py --state-file ~/.hermes/pipeline_state.json" in cron_def
+
+
+def test_issue_650_verification_doc_records_current_mainline_state() -> None:
+    doc = (REPO_ROOT / "docs" / "issue-650-verification.md").read_text()
+
+    assert "already implemented on `main`" in doc
+    assert "scripts/reset_pipeline_state.py" in doc
+    assert "cron/pipeline-daily-reset.yml" in doc
+    assert "Close issue #650 as already implemented on `main`." in doc