diff --git a/docs/hygiene-history/loop-tick-history.md b/docs/hygiene-history/loop-tick-history.md
index 2259a573e..1420a26dc 100644
--- a/docs/hygiene-history/loop-tick-history.md
+++ b/docs/hygiene-history/loop-tick-history.md
@@ -318,3 +318,4 @@ fire.
 | 2026-04-30T04:46:00Z (autonomous-loop tick — slice-11 #884 merged + slice-12 #885 opened (backlog/generate-index port)) | opus-4-7 / session continuation | 98fc7424 | **Slice-11-lands + slice-12-opens consolidated row.** PR #884 (slice 11, 2 ports — backfill_dv2_frontmatter + audit-packages) MERGED 2026-04-30T04:42:42Z commit 9237756 after multiple review rounds across the prior compacted session: CodeQL TOCTOU findings (refactored statSync-then-readFileSync to readFileSync-with-try/catch + ENOENT/EISDIR error mapping), atomic-rewrite restoration via tmp+rename, --all chdir-to-repoRoot fix, repoRoot via fileURLToPath(import.meta.url) for cwd-independence, defensive-rename-fallback per Codex P0 then retracted to preserve-original-on-failure per P1, fail-on-empty-parse on audit-packages per P2 (regex-drift suspicion message), Copilot milestone math 33→32 fix. PR #885 (slice 12) opened with 1 port: backlog/generate-index byte-equivalent against bash on --stdout mode (217 to 282 lines TS — Phase-1a 50-line safety guard preserved + 3 modes write/--check/--stdout + in-memory line-by-line diff replaces shell-out to diff). RESUME milestone bumped 32 to 33 ports total (32 merged + 1 in-flight); Bucket B 12 to 10 remaining; Bucket D ported list grew to 32 entries. Auto-merge armed on #885. Cron 98fc7424 still armed. | 9237756 (slice-11 merge; slice-12 PR-open at write-time, merged shortly after as cfb5964) | **Observation — Codex P0 vs P1 sequencing**: prior session illustrated the value of treating P0 as immediately-actionable and P1 as a check-back-after-resting-the-fix. Codex P0 said "add defensive renameSync fallback for Windows file-lock edge cases"; landed it. Codex P1 follow-up said "wait, the fallback unlinks the original before retry — that's worse than the original failure mode (loses content on second-failure)"; retracted to preserve-original-on-failure. The two findings together correctly converge on the right design but neither alone would have. **Observation — fileURLToPath(import.meta.url) is the right repoRoot pattern**: bash's `cd "$(dirname "$0")/.." && pwd` resolves the script location and walks up; the prior `git rev-parse --show-toplevel` + cwd fallback fails outside a git checkout (uses wrong cwd silently). The import.meta.url variant matches bash's invocation semantics from any caller directory. Will reuse for all future tools/* TS ports that bash-originals resolve relative to script location. **Observation — Bucket B is now in single-digits**: 10 remaining (1 in-flight + 9 to-port). Of those 9: 5 are budget/git scripts (touch shared production state, careful), 3 are peer-call wrappers (LLM-CLI shell-outs, equivalence not deterministic), 1 is pr-preservation/archive-pr.sh (mutating gh API). The pure-equivalence-testable scripts in Bucket B are essentially exhausted; remaining ports require special-handling per script class. |
 | 2026-04-30T05:01:00Z (autonomous-loop tick — arc close: 4 PRs landed in sequence (#885 slice-12 + #888 B-0106 backlog + #886 tick row + #887 tsc TS2322 fix); tsc clean verified on main) | opus-4-7 / session continuation | 98fc7424 | **Arc-close consolidated row.** Four PRs landed in this session arc: PR #885 (slice 12 — `tools/backlog/generate-index` port, commit cfb5964) → PR #888 (P2 backlog row B-0106 capturing the missing `tsc --noEmit` gate, commit 5353fad) → PR #886 (tick-history row at 04:46:00Z, commit 1207ff8) → PR #887 (real tsc TS2322 fix in `audit-agencysignature-main-tip.ts` + Copilot follow-up to derive `StringArgKey` from `Exclude<keyof MutableArgs, "mode">`, commit 5dc1abd). Bug-find lineage: while running `bun --bun tsc --noEmit` for slice-12 verification, surfaced a real strict-typecheck error on slice-9's port (#882) that had silently shipped to main because gate.yml has no `tsc --noEmit` step (only `dotnet build`). Fixed locally + filed B-0106 to close the CI gap. Final state: tsc clean on main verified post-merge. Bucket B 10 → 9 (slice-12 merged); 32 → 33 ports total. Cron 98fc7424 still armed. | 5dc1abd (final PR of the arc; #887) | **Observation — bug-find via tsc-on-port-verification IS a useful post-merge gate**: even without CI catching tsc, the local discipline of `bun --bun tsc --noEmit` before committing each slice surfaced the slice-9 defect. The fix-the-bug + file-the-row pattern (PR #887 + B-0106) made the local catch durable as factory substrate. Will reuse for future slices. **Observation — auto-merge survives non-force-pushes**: PR #887's regular push (after Copilot follow-up commit) preserved the auto-merge `enabledAt` timestamp; force-pushes (PR #886's earlier rebase) reset it. Practical rule: only force-push when content needs to change pre-history; otherwise prefer additive commits to keep auto-merge stable. **Observation — Copilot's `Exclude<keyof T, "x">` catch is a substrate rule**: when narrowing `keyof T` to exclude one or two members, prefer `Exclude<keyof T, "x">` over hand-listed literal unions — the compiler keeps it drift-free if `T` grows. Worth absorbing as a TS+Bun port pattern. |
 | 2026-04-30T05:11:00Z (autonomous-loop tick — B-0106 implementation merged: lint-tsc-tools gate job active; 6 PRs landed in this session) | opus-4-7 / session continuation | 98fc7424 | **B-0106 closeout tick.** PR #890 (`ci(B-0106): add lint-tsc-tools gate job`) MERGED 2026-04-30T05:11:56Z commit 9ca9ed9. Closes the CI gap that surfaced 2 ticks earlier when slice-12 verification caught the slice-9 TS2322 defect. Full bug-class loop now sealed: PR #887 fixed the local instance → PR #888 filed B-0106 capturing the missing gate → PR #890 implements the gate. The new `lint (tsc tools)` job runs `bun --bun tsc --noEmit -p tsconfig.json` after install.sh + `bun install --frozen-lockfile` materializes typescript@6.0.3. Self-validated against its own diff (the new check passed on PR #890). 6 PRs total in this session arc: #885 (slice 12 port) → #888 (B-0106 row) → #886 (tick row 04:46) → #887 (tsc bug fix) → #889 (closing tick row 05:01) → #890 (B-0106 implementation). Bucket B 9 → 9 (no new ports this round); Bucket D 33 → 33 (no new ports). New CI gate adds protection class for future TS scripts. B-0106 status updated open → in-progress → closed; closed_in: PR #890. Cron 98fc7424 still armed. | 9ca9ed9 (B-0106 implementation; #890) | **Observation — full bug-class loop closed in 4 PRs over ~30 minutes**: pattern was find-bug-locally (tsc check before slice-12 commit) → fix-local (PR #887) → file-row-for-missing-gate (PR #888) → implement-row-as-CI-job (PR #890). Each step durable at the right surface (code → backlog → CI workflow). The gate self-validates because it runs against its own diff in PR #890 — would only block merge if the new job's bun install + tsc run failed. **Observation — semgrep-elevation-shape applied to typecheck**: the new `lint (tsc tools)` follows the same pattern as the round-30 semgrep elevation: codified rules (tsconfig.json strict mode + .semgrep.yml rules) without a CI gate aren't a control. Both gates are now mechanical guardrails rather than vigilance-dependent disciplines. Worth absorbing as factory pattern: any rule codified in a config file should have a CI gate that fails on violation. **Observation — branch protection's required-checks list may need manual update**: the new `lint (tsc tools)` check might or might not be auto-required depending on host branch protection config. Follow-up audit needed: verify `gh api repos/.../branches/main/protection/required_status_checks/contexts` includes the new check. If not, file a follow-up row to add it (would be A trivial host-mutation requiring visibility per Aaron's Otto-355 visibility constraint). |
+| 2026-04-30T05:31:00Z (autonomous-loop tick — slice-13 #892 merged: git/push-with-retry ported through new tsc-tools gate; 8 PRs total in session arc) | opus-4-7 / session continuation | 98fc7424 | **Slice-13 lands + session-arc closure tick.** PR #892 (`ts(B-0086): port 1 git script — slice 13`) MERGED 2026-04-30T05:31:00Z commit e9dc894. First TS file to traverse the new `lint (tsc tools)` gate from PR #890 — gate validated end-to-end (built #890 → self-validated #890 → first-real-validation #892 + #891 → review-cycle on #892 with Codex/Copilot raising 5 real findings → fixes round-tripped through gate clean). Review-cycle findings: (1) Codex P2 stderr-null guard for spawn failures; (2) Copilot P1 spawnSync failure classification (status null → 127 ENOENT / signal / other); (3) Copilot P1 line-count drift in audit (138 → 184); (4) Copilot P1 sleepSeconds comment claimed nonexistent fallback; (5) Copilot P2 missing eslint-disable rationale. All resolved in single commit. Session arc total: 8 PRs landed (#885 slice-12 + #888 B-0106-row + #886 tick + #887 tsc-fix + #889 tick + #890 B-0106-impl + #891 B-0106-closeout + #892 slice-13). Bucket B 9 → 8; 34 ports total. New CI gate now battle-tested across 3 PRs with the gate active. Cron 98fc7424 still armed. | e9dc894 (slice-13 merge; #892) | **Observation — eslint-disable-next-line directive placement matters**: reviewer caught that placing rationale comments BETWEEN the directive and the target code breaks the directive (it applies to the literal next line). Correct pattern: rationale ABOVE the directive, with the directive immediately preceding the suppressed line. Worth absorbing as factory pattern for future TS ports with eslint-disable lines. **Observation — spawnSync failure classification is reusable substrate**: the 4-case helper (status set / ENOENT → 127 / other error / signal) belongs in any TS port that shells out to a CLI. Should seed into the TS+Bun expert skill (#351) once that lands, alongside the `Exclude<keyof T, "x">` narrowing pattern from #887. **Observation — automated reviewers' P1+P2 findings compound usefully when batched**: 5 findings from 2 reviewers on a single ~150-line file, all addressed in 1 round-trip commit. The eslint-disable placement caught structural correctness; the spawn-classification caught real edge cases; the comment-vs-implementation drift catches inflate-prose-without-substance. Each is small alone; together they upgrade the file's robustness materially. |