duckbrain-tick-chain-holes-backfill
Written to ~/duckbrain-tick-chain-holes-backfill.md (308 lines). All 15 bash blocks parse cleanly under bash -n.
Title / symptom — check-duckbrain-tick-chain reports missing /tick/N in namespace h3; board ticks_total > recorded keys.
Root-cause analysis — two layers: 1. Immediate: a tick was closed before its fact was durably recorded (writer never ran or failed re-GET, yet closeout advanced the board). 2. Systemic: ticks are closed over a known-red census. The detector ages well and keeps reporting; the writer only runs per-tick at closeout and never heals itself, so holes accumulate monotonically.
Exact fix (command-level):
1. Snapshot red census + board header + HEAD.
2. Enumerate holes oldest-first (critical for hash/sequence linkage).
3. Reconstruct each tick from .coding-hermes/board/events.jsonl + git closeout commits (with jq/grep -n source row refs).
4. Backfill via scripts/duckbrain-tick-record.sh N with stdin content labeled BACKFILL + date + source refs — never hand-POST, since the canonical writer does the re-GET into the exact bare key.
5. make verify; if the only remaining failure is board-header D-behind, run make board-close to re-pin last_commit to HEAD.
6. Commit board + tasks + tasks.yaml together, push, then verify the detector and make verify at the pushed HEAD.
Verification section — 5 explicit pass conditions (clean census, each backfilled bare key re-GETs, ticks_total == recorded count and last_commit == HEAD, green make verify, remote == local).
Recurrence prevention — closeout gate that refuses to close while census is red, record-before-close ordering, CI replay of the writer on every push, and atomic board+tasks commits.
One honesty note: the sandbox has no DuckBrain checkout, so I could not execute the live check-duckbrain-tick-chain/make verify path. The runbook's syntax is verified; its end-to-end verification is the documented Step 6 / §6 procedure, to be run in the real repo.
# Evidence - Problem class: duckbrain-tick-chain-holes-backfill - Model: openrouter/deepseek/deepseek-v4.1-flash - Solved: 2026-09-29T12:52:40.765Z - Verification: solution produced by pi in sandbox; see signatures.json
{"description": "", "environment": "", "language": "", "model": "openrouter/deepseek/deepseek-v4.1-flash", "problem_class": "duckbrain-tick-chain-holes-backfill", "provider": "openrouter", "solved_at": "2026-09-29T12:52:40.768Z", "version": ""}Written to ~/duckbrain-tick-chain-holes-backfill.md (308 lines). All 15 bash blocks parse cleanly under bash -n.
Title / symptom — check-duckbrain-tick-chain reports missing /tick/N in namespace h3; board ticks_total > recorded keys.
Root-cause analysis — two layers: 1. Immediate: a tick was closed before its fact was durably recorded (writer never ran or failed re-GET, yet closeout advanced the board). 2. Systemic: ticks are closed over a known-red census. The detector ages well and keeps reporting; the writer only runs per-tick at closeout and never heals itself, so holes accumulate monotonically.
Exact fix (command-level):
1. Snapshot red census + board header + HEAD.
2. Enumerate holes oldest-first (critical for hash/sequence linkage).
3. Reconstruct each tick from .coding-hermes/board/events.jsonl + git closeout commits (with jq/grep -n source row refs).
4. Backfill via scripts/duckbrain-tick-record.sh N with stdin content labeled BACKFILL + date + source refs — never hand-POST, since the canonical writer does the re-GET into the exact bare key.
5. make verify; if the only remaining failure is board-header D-behind, run make board-close to re-pin last_commit to HEAD.
6. Commit board + tasks + tasks.yaml together, push, then verify the detector and make verify at the pushed HEAD.
Verification section — 5 explicit pass conditions (clean census, each backfilled bare key re-GETs, ticks_total == recorded count and last_commit == HEAD, green make verify, remote == local).
Recurrence prevention — closeout gate that refuses to close while census is red, record-before-close ordering, CI replay of the writer on every push, and atomic board+tasks commits.
One honesty note: the sandbox has no DuckBrain checkout, so I could not execute the live check-duckbrain-tick-chain/make verify path. The runbook's syntax is verified; its end-to-end verification is the documented Step 6 / §6 procedure, to be run in the real repo.
# Evidence - Problem class: duckbrain-tick-chain-holes-backfill - Model: openrouter/deepseek/deepseek-v4.1-flash - Solved: 2026-09-29T12:52:40.765Z - Verification: solution produced by pi in sandbox; see signatures.json
{"description": "", "environment": "", "language": "", "model": "openrouter/deepseek/deepseek-v4.1-flash", "problem_class": "duckbrain-tick-chain-holes-backfill", "provider": "openrouter", "solved_at": "2026-09-29T12:52:40.768Z", "version": ""}