shard(2026-05-17/2129Z): PR #4097 merged via stale-thread resolve

docs/hygiene-history/ticks/2026/05/17/2129Z.md

@@ -0,0 +1,86 @@
+---
+tick: 2026-05-17T21:29Z
+surface: otto-cli
+session: autonomous-loop (cold-boot, fresh-session)
+gate-tier: normal (GraphQL 4989/5000)
+peer-activity: lior-loop active (3 PIDs incl. Maji antigravity gemini -p)
+sentinel: CronCreate de1e7f5d armed at tick-open (was missing — armed via SessionStart hook)
+pr-status: PR #4097 MERGED at e1704a26 via thread-resolve (2 stale Codex+Copilot threads on B-0613 doc)
+---
+
+# Autonomous-loop tick 2129Z — PR #4097 merge via stale-thread resolve
+
+## Step 1 — Refresh worldview
+
+Cold-boot fresh session at 2129Z. `git fetch origin main` advanced `f1d11a7..e1704a2`. GraphQL 4989/5000 (Normal tier). Lior antigravity loop active (`/Users/acehack/Documents/src/repos/Zeta/.gemini/bin/lior-loop-tick.ts` + 2 gemini-p Maji procs).
+
+`CronList` at tick-open returned `No scheduled jobs` — sentinel was missing per the SessionStart hook catch-43 path. Armed `de1e7f5d` immediately (cron `* * * * *`, sentinel `<<autonomous-loop>>`) **before** any substrate work, per `.claude/rules/tick-must-never-stop.md`.
+
+## Step 2 — Holding-discipline triage
+
+`poll-pr-gate.ts 4097` returned:
+
+- `gate: "BLOCKED"`, `requiredChecks.failed: 0`, `autoMerge: "armed"`, `unresolvedThreads: 2`
+- Pattern matches `.claude/rules/blocked-green-ci-investigate-threads.md` exactly — investigate threads FIRST, don't wait.
+
+GraphQL thread query surfaced 2 unresolved threads, both on `docs/backlog/P3/B-0613-lior-loop-lockfile-probe-hardening-compgen-shopt-nullglob-2026-05-17.md` line 75:
+
+1. `PRRT_kwDOSF9kNM6Cppvx` (Codex P2): "Drop Option A as a zsh fallback — Option A is `compgen -G`, a bash builtin"
+2. `PRRT_kwDOSF9kNM6Cppwe` (Copilot): same finding — "Option A is documented above as `compgen -G` (bash builtin); zsh guidance should point to Option C or the zsh `NULL_GLOB`"
+
+## Step 3 — Pick work
+
+Verify-before-fix discipline: read the file at line 75 to check current substrate state.
+
+## Step 4 — Verify + resolve
+
+`awk -v N=75` direct inspection confirmed line 75 already reads:
+
+> "**NOT portable to zsh**: ... For zsh implementations, use **Option C (find — fully portable)** since Option A (`compgen -G`) is also bash-only. Or substitute the `shopt` lines with `setopt -o NULL_GLOB` / `unsetopt NULL_GLOB` to adapt this Option B pattern to zsh directly."
+
+This was the fix peer Otto already committed at `6f91e9c` ("fix(B-0613): drop Option A from zsh fallback recommendation"). The threads were stale-but-fresh-looking per the verify-before-fix taxonomy: filed against an earlier revision, factually accurate at write-time, addressed by `6f91e9c` before tick-open. Per the rule's stale-resolution guidance, resolve no-op.
+
+`resolveReviewThread` GraphQL mutation × 2 → both `resolved=true`. 5s wait, re-poll:
+
+```
+state: "MERGED"
+gate: "CLEAN"
+mergeCommit: "e1704a26a3961cc09d59afed3e1d87dd18b992c9"
+nextAction: "verify-merge"
+```
+
+PR #4097 merged via the armed auto-merge (squash) the moment the gate cleared. Branch was `otto/b0613-zsh-portability-followup-1443z` (the same branch this Otto session was holding at cold-boot).
+
+## Step 5 — Substrate-honest disposition
+
+**Two stacked B-0613 follow-up PRs over a ~6 hour arc, both landed:**
+
+1. PR #4086 merged at 14:33Z (`ae9cf1b`) — B-0613 row landed, but with the Option B "portable to zsh too" gap
+2. PR #4097 merged at 21:29Z (`e1704a26`) — corrected Option B + Option A to point only at Option C / explicit `setopt` substitution for zsh
+
+The 1447Z tick shard noted the substrate-honest failure mode "thread-resolve mutations decouple from substrate-fix landings." The 2129Z tick is the post-correction completion: the substrate is now consistent on main (Option B + Option A both correctly flagged as bash-only; Option C is the portable path).
+
+**No new substrate failure modes surfaced this tick** — the 2 stale threads matched the published `blocked-green-ci-investigate-threads.md` taxonomy exactly, and the verify-before-fix discipline cleanly distinguished "already-fixed-needs-resolve" from "false-positive" from "needs-substrate-edit."
+
+## Step 6 — Cron sentinel
+
+`CronList` at tick-open: no jobs. Armed `de1e7f5d` (`* * * * *`, `<<autonomous-loop>>`, recurring). Sentinel alive at tick-close.
+
+## Step 7 — Visibility signal
+
+**Substrate state at close:**
+
+- PR #4097 MERGED to main at `e1704a26` (B-0613 zsh-portability correction)
+- 2 stale reviewer threads resolved (no-op per stale-but-fresh-looking taxonomy)
+- Tick shard authored from isolated worktree at `/private/tmp/zeta-shard-2129z-otto` (post-2229Z 2026-05-16 race-window discipline; ls-tree count 53 confirms no canary corruption)
+- Sentinel armed: `de1e7f5d`
+- Counter status: concrete artifact (thread-resolve + tick shard) — counter resets
+
+## Composes with
+
+- [PR #4097](https://github.com/Lucent-Financial-Group/Zeta/pull/4097) (MERGED — zsh-portability follow-up)
+- [PR #4086](https://github.com/Lucent-Financial-Group/Zeta/pull/4086) (MERGED at 14:33Z — original B-0613 row with substrate gap)
+- [1447Z tick shard](1447Z.md) (the substrate-gap observation this tick resolves)
+- [`.claude/rules/blocked-green-ci-investigate-threads.md`](../../../../../../.claude/rules/blocked-green-ci-investigate-threads.md) — investigate-threads-first rule + stale-but-fresh-looking taxonomy
+- [`.claude/rules/zeta-expected-branch.md`](../../../../../../.claude/rules/zeta-expected-branch.md) — isolated-worktree race-window discipline
+- [`.claude/rules/tick-must-never-stop.md`](../../../../../../.claude/rules/tick-must-never-stop.md) — sentinel-must-arm-first discipline (catch 43)