Research log 2026-09-23 — Radar audit-aware arc (STEP 2202-2215)

STEP timeline (12 primary + 4 corrigenda = 17 commits)

Arc key achievement

Radar audit-aware 3-layer defense (STEP 2203 + 2204 + 2211)

• Feature 1 (STEP 2203 scoring-time): score-papers.ts +140 line audit-aware augmentation、 Top-N 3 分割 (fresh / audited / withdrawn) + collatz-watch.json cross-ref registry marker
• Feature 2 (STEP 2204 fetch-time): arxiv-fetcher.ts +64 line、 updated !== published heuristic + 4-signature regex + rate-limit 3s + fail-open、 新着 で いきなり 撤回状態 catch
• Feature 3 (STEP 2203 periodic): refresh-watchlist.ts 新規 (~185 line、 stdlib only)、 14 tracked papers を 定期 arxiv HTTP fetch で 撤回状態 auto-detect → collatz-watch.json auto-update
• Drift monitor (STEP 2211): signature-drift-check.ts --offline (fixture) + --live (arxiv Niu fetch) で 4-signature regex の 有効性 監視、 arxiv HTML markup 変更 の early warning

Infrastructure improvements (STEP 2207 + 2210)

• git-atomic-commit.sh: untracked auto-add fix (fm-atomic-commit-only-rejects-untracked-files addressed)、 pre-add discipline unnecessary 化
• Pre-commit hook find MEMORY.md optimization: basename cache one-shot、 実測 15 min → 5 min ≈ 3x speedup (STEP 2205 vs STEP 2206 retry で 実測、 corrigendum #1 で predicted → measured refined)
• edit-hook-safely.sh: tempfile+POSIX mv atomic replacement、 fm-hook-edit-via-edit-tool-transient-syntax-error 対応、 concurrent commit 中 の transient syntax error 予防

Registry improvements (STEP 2208 + 2212)

• arxiv-withdrawal.ts shared module (STEP 2208): 4-signature regex + detectWithdrawalInHtml + extractCanonicalArxivId single source of truth、 fm-code-duplication-detect-withdrawal eliminated
• radar-{date}.md 本文 audit marker (STEP 2212): arxiv-fetcher.ts sub-report Top 20 に per-paper 「✓ audited STEP N」 / 「⚠ WITHDRAWN」 embed、 STEP 2205 Critical Alerts summary 補完

Chat-Claude relay chain (3 rounds + 2 corrigenda)

1. Round 1 (STEP 2202): PID 7496 marker 文言 / (j) hits noise verify / (l) count refresh / (q) monitor 継続 / arXiv 2606 由来 日付/番号 矛盾 / alerts count / attribution direction / 5-Layer Scorer 85% TRUE bias 補足 / Collatz 3-paper 事前検証 STEP 起票 提案
2. Round 2 (STEP 2206+2207 corrigendum #1): bias mitigation → redistribution 撤回 / Item #6 predicted → measured (15 min → 5 min) / hook edit tempfile+mv rule / shared helper 抽出 recommendation
3. Round 3 (STEP 2209+2213 corrigendum #1): n=19 制約 明示 (「偏り残 vs 消」 binary 判定 のみ、 target 数字化 は 標本追加 先行) / peer notification 実効化 (CLAUDE.md session-start protocol 追加) / fm alias unification

Fm dataset 変化 (今日 emerge / eliminated / addressed)

Eliminated (1)

• fm-code-duplication-detect-withdrawal (STEP 2204 marker → STEP 2208 shared module 抽出 で resolved)

Addressed via infrastructure (5)

• fm-radar-re-flag-already-audited-paper (STEP 2203 Feature 1)
• fm-radar-withdrawn-paper-not-flagged (STEP 2203/2204/2211 defense-in-depth)
• fm-atomic-commit-only-rejects-untracked-files (STEP 2207 Item #5)
• fm-pre-commit-hook-slow-find-memory-md (STEP 2207 Item #6)
• fm-hook-edit-via-edit-tool-transient-syntax-error (STEP 2210 helper + memory rule、 alias fm-hook-mid-modification-transient-syntax-error 統合)

New marker candidates (7、 discipline layer)

• fm-target-without-ground-truth-baseline (STEP 2206 corrigendum、 STEP 2209 partial address)
• fm-narrative-fit-without-numerical-verify (STEP 2202 corrigendum、 STEP 2207 Item #6 measured で 予防 pattern 実演)
• fm-site-coverage-claim-without-artifact-verify (STEP 2202 rei-aios-88 ghost 発見)
• fm-code-duplication-audit-index-build (STEP 2212 marker、 未来 arxiv-audit-index.ts shared module 抽出 candidate)
• fm-signature-drift-goes-undetected (STEP 2211 partial address)

Honest scope

Session close preparation

本 STEP 2215 が session-day arc close bundle。 rei-aios-59 tab は 本 STEP land + push 後 に close 予定 (藤本さん 「タブ閉じ」 delegation)。 藤本さん 帰宅後 の judgment 待ち defer items は memory canonical file (memory/project_session_day_arc_2026-09-23.md) に 完全 記録、 未来 の Claude session が session-start protocol で discover 可能。