con.execute(f"CREATE TABLE events AS SELECT FROM readparquet('{EVENTS}')")
Diagnosis: Tick 47 is the 14th consecutive idle audit on a completed vanilla-JS Pages project — 12/12 gates pass, no task status changed, so the only legitimate board mutation is the audit trail itself. The three failure-prone details are: (1) timestamp convention (siblings mix UTC ...Z and naive-local; majority = naive local), (2) adding only the changed parquet (re-exporting unchanged tasks.parquet must not produce a git diff), and (3) the no-push commit ritual (git add -f because *.parquet is gitignored, NO git push under the Pages deploy-from-main policy).
The fix — the tick-47 audit procedure (board v2.1 pattern):
from datetime import datetime
import duckdb, hashlib, pathlib, subprocess
BOARD = pathlib.Path("board")
EVENTS, TASKS = BOARD / "events.parquet", BOARD / "tasks.parquet"
# 1) gates: 12/12 pass (idle audit) — no task status change, no code delta
con = duckdb.connect()
con.execute(f"CREATE TABLE events AS SELECT * FROM read_parquet('{EVENTS}')")
con.execute(f"CREATE TABLE tasks AS SELECT * FROM read_parquet('{TASKS}')")
# 2) timestamp: NAIVE LOCAL, sec precision — majority convention (not UTC 'Z',
# not 'T' separator). Microseconds dropped: board strptime('%Y-%m-%d %H:%M:%S')
# rejects fractional seconds.
ts = datetime.now().replace(microsecond=0).isoformat(sep=' ') # '2026-08-02 02:09:43'
# 3) insert audit_ran (idempotent per tick), re-export events.parquet
con.execute(f"""INSERT INTO events SELECT 47, 'audit_ran', 'audit', '{ts}'
WHERE NOT EXISTS (SELECT 1 FROM events WHERE tick = 47)""")
con.execute(f"COPY events TO '{EVENTS}' (FORMAT PARQUET, OVERWRITE_OR_IGNORE)")
# 4) re-export tasks.parquet, then byte-compare: unchanged => do NOT stage it
pre = hashlib.sha256(TASKS.read_bytes()).hexdigest()
con.execute(f"COPY tasks TO '{TASKS}' (FORMAT PARQUET, OVERWRITE_OR_IGNORE)")
post = hashlib.sha256(TASKS.read_bytes()).hexdigest()
assert post == pre, "no task status changed -> tasks.parquet must be byte-identical"
# 5) board-only commit with git add -f (parquet is gitignored); NO push
subprocess.run(["git", "add", "-f", "board/events.parquet"], check=True) # ONLY the changed parquet
subprocess.run(["git", "commit", "-m", f"tick-47: idle audit (14th consecutive, 12/12 gates)"], check=True)
# git push is NEVER called — Pages deploys from main
E2E-001 self-pause (due ~T48-53): this tick is not paused — 12/12 gates pass, so the audit proceeds normally. The forward-guard is a pause_gate check at the top of the runner: before inserting/committing, read the E2E-001 fixture state; once it flips to paused (~T48–53) the runner becomes read-only (gates only, no event insert, no commit) so the pause is not erased by a stray audit_ran. Optionally attach {"pause_due": true} in the audit_ran payload on this tick so the board's own queries can pre-warn.
No repo was present in the environment, so I built a faithful local simulation of the board v2.1 pattern (DuckDB 1.5.5 via uv venv): seeded `events.parquet` with 46 sibling events — 31 naive-local `YYYY-MM-DD HH:MM:SS` (majority), 15 UTC `...T...Z` — plus `tasks.parquet` (3 done tasks), inside a git repo with `*.parquet` gitignored, `main` branch, no remote. Then ran the audit, reran it, and probed edge cases:
- **Clean run:** gates 12/12; `events.parquet` 46→47 rows (+1 `audit_ran` only); `audit_ran ts=2026-08-02 02:09:43` parses with `strptime('%Y-%m-%d %H:%M:%S')`; `tasks.parquet` sha256 `6faad82910f6` before **and** after (byte-identical); `git show --stat` lists **only `board/events.parquet`**; `board/` worktree clean after commit.
- **Idempotent rerun:** the `WHERE NOT EXISTS` guard + byte-identical re-export ⇒ no duplicate row (still 47) and commit correctly no-ops ("nothing to commit") — a re-run never creates a second commit.
- **E1 board-clean:** `git status --porcelain board/` empty after commit; tooling scripts living outside `board/` don't pollute the board-only commit.
- **E3 `git add -f` required:** `git check-ignore -v board/tasks.parquet` → `.gitignore:1:*.parquet` rc=0, i.e. a plain `git add board/*.parquet` is silently ignored; `-f` is mandatory. (Tracked `events.parquet` reports rc=1 only because check-ignore skips tracked files — the untracked file proves the rule.)
- **E4 mixed timestamps:** board query normalizing both formats (`'%Z' → AT TIME ZONE 'UTC'`, else `strptime`) returns all rows without error — mixed siblings are tolerated; the new event matches the majority shape exactly.
- **E5 no-push:** repo has zero remotes and the audit script contains no `git push` — deploy-from-main policy holds.
- **Edge case caught:** `datetime.now().isoformat(sep=' ')` without `replace(microsecond=0)` emits `2026-08-02 02:08:46.776717`, which **breaks** `strptime('%Y-%m-%d %H:%M:%S')` (trailing chars) — truncated to second precision to match the 31/46 majority and every board parse.{"model": "deepseek-v4-flash", "problem_class": "js-vanilla-idle-audit", "result": "passed", "tests": 11}