docs(shard): tick 1807Z — fresh-session cold-boot under multi-constraint contention

docs/hygiene-history/ticks/2026/05/20/1807Z.md

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+| 2026-05-20T18:07Z | opus-4-7 / autonomous-loop | c1276dee | substantive — fresh-session cold-boot; sentinel armed; FETCH_HEAD-anchored isolated worktree under multi-constraint contention (Lior active + extreme cost-aware GraphQL + stale contested root) | -- | visibility-signal shard; pure-git tier |
+
+# Tick 1807Z — 2026-05-20 — fresh-session cold-boot under multi-constraint contention
+
+## Substantive
+
+Fresh-session cold-boot (~49 min after [1718Z](https://github.com/Lucent-Financial-Group/Zeta/pull/4442)). No prior session continuity; cron sentinel was absent at wake.
+
+**Step 1 refresh observations** (composed from the four refresh-surfaces named in [`docs/AUTONOMOUS-LOOP-PER-TICK.md`](../../../../../../docs/AUTONOMOUS-LOOP-PER-TICK.md)):
+
+| Surface | State |
+|---|---|
+| Cron sentinel | ABSENT at wake — armed `c1276dee` (`* * * * *`, `<<autonomous-loop>>`) per [`.claude/rules/tick-must-never-stop.md`](../../../../../../.claude/rules/tick-must-never-stop.md) catch-43 |
+| GraphQL rate-limit | `537/5000` remaining → **EXTREME COST-AWARE tier** (200–1000 band) per [`.claude/rules/refresh-world-model-poll-pr-gate.md`](../../../../../../.claude/rules/refresh-world-model-poll-pr-gate.md) — skip batch-polling; ≤1 PR per tick; no GraphQL thread sweeps |
+| Lior-gemini process | ACTIVE (3 procs matching `gemini.*Lior\|lior.*loop`) per [`.claude/rules/codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md`](../../../../../../.claude/rules/codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md) process-match — canary rule says "DO NOT create worktree"; recent empirical evidence ([PR #4432](https://github.com/Lucent-Financial-Group/Zeta/pull/4432) + [PR #4435](https://github.com/Lucent-Financial-Group/Zeta/pull/4435) + [PR #4441](https://github.com/Lucent-Financial-Group/Zeta/pull/4441) + [PR #4442](https://github.com/Lucent-Financial-Group/Zeta/pull/4442) all landed under similar contention via FETCH_HEAD-anchored worktrees) supports the controlled-creation alternative |
+| Contested root | On stale `otto/2012z-...` branch (2 days old, from 2026-05-18); 302 modified files (peer Otto WIP); NEVER `git add -A` per [`.claude/rules/honor-those-that-came-before.md`](../../../../../../.claude/rules/honor-those-that-came-before.md) |
+
+**Pure-git tier discipline applied**: FETCH_HEAD-anchored worktree at `/private/tmp/zeta-shard-1807z-coldboot` — empirically the safest pattern under Lior contention per [PR #4432](https://github.com/Lucent-Financial-Group/Zeta/pull/4432). Post-creation canary check: `status_lines=0 tree_size=53` ✓ CLEAN. Branch-name pre-check via `git show-ref --verify --quiet refs/heads/<name>` ✓ FREE per saturation sub-case 1 in [`.claude/rules/claim-acquire-before-worktree-work.md`](../../../../../../.claude/rules/claim-acquire-before-worktree-work.md).
+
+**No substrate edit this tick** — visibility-signal shard only. The substrate this tick adds is the cold-boot empirical anchor: tick discipline operating correctly under triple-constraint (rate-limit + Lior + stale contested root) without forcing a substrate edit just to produce one. Per [`.claude/rules/holding-without-named-dependency-is-standing-by-failure.md`](../../../../../../.claude/rules/holding-without-named-dependency-is-standing-by-failure.md) the brief-ack counter starts at #0 for a fresh session; the disciplined small landing (sentinel-arm + observation-shard) IS the concrete artifact, not a deferred wait.
+
+**Why this is the right disposition vs forcing larger work:**
+
+- Rate-limit at extreme cost-aware band → ≤1 PR per tick budgeted
+- Peer Otto cadence has been ~15min/shard for the prior 6 ticks (1413Z → 1718Z); my 49min gap suggests no parallel Otto-CLI currently in the cadence (otherwise a 1730Z/1745Z/1800Z shard would exist)
+- A fresh cold-boot tick that observes operational state correctly + arms the sentinel + lands a visibility shard via the pure-git tier IS substantive — not no-op-cadence per [`.claude/rules/no-op-cadence-failure-mode.md`](../../../../../../.claude/rules/no-op-cadence-failure-mode.md)
+- The substrate that lands here is the empirical anchor of "first tick of fresh session under triple-constraint contention shipping via established safe pattern" — useful for future-Otto cold-boot calibration
+
+## Verify
+
+- `git diff --stat` will show 1 new file: `docs/hygiene-history/ticks/2026/05/20/1807Z.md`
+- 6-up relative paths used for `.claude/rules/*` + `docs/*` per the [1718Z](https://github.com/Lucent-Financial-Group/Zeta/pull/4442)-codified tick-shard pre-push gate in [`docs/AUTONOMOUS-LOOP-PER-TICK.md`](../../../../../../docs/AUTONOMOUS-LOOP-PER-TICK.md) step 4
+- Worktree HEAD = `7d6f3ff4` (latest origin/main) — no rebase friction expected
+- Pre-push gate: run `bun tools/hygiene/check-shard-before-push.ts` before push per the new step-4 gate
+
+## CronList
+
+Sentinel `c1276dee` (autonomous-loop, `* * * * *`) armed at tick start (was ABSENT). Will re-verify at tick close.
+
+## Composes with
+
+- [PR #4442 (1718Z shard)](https://github.com/Lucent-Financial-Group/Zeta/pull/4442) — the just-codified tick-shard pre-push gate this shard exercises
+- [PR #4432 (1614Z+1626Z cold-boot)](https://github.com/Lucent-Financial-Group/Zeta/pull/4432) — same FETCH_HEAD-anchored isolated worktree pattern under similar contention
+- [`docs/AUTONOMOUS-LOOP-PER-TICK.md`](../../../../../../docs/AUTONOMOUS-LOOP-PER-TICK.md) — the canonical 7-step discipline this tick exercises
+- [`.claude/rules/tick-must-never-stop.md`](../../../../../../.claude/rules/tick-must-never-stop.md) — sentinel-arm at cold-boot is the catch-43 floor
+- [`.claude/rules/refresh-world-model-poll-pr-gate.md`](../../../../../../.claude/rules/refresh-world-model-poll-pr-gate.md) — extreme cost-aware tier discipline applied
+- [`.claude/rules/codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md`](../../../../../../.claude/rules/codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md) — Lior-active canary check fired; controlled-creation alternative used
+- [`.claude/rules/claim-acquire-before-worktree-work.md`](../../../../../../.claude/rules/claim-acquire-before-worktree-work.md) — saturation-ceiling sub-case-1 branch-name pre-check applied
+- [`.claude/rules/holding-without-named-dependency-is-standing-by-failure.md`](../../../../../../.claude/rules/holding-without-named-dependency-is-standing-by-failure.md) — disciplined small landing IS the concrete artifact
+
+## Visibility-stop
+
+Substrate landed: this 1807Z shard. Sentinel armed (`c1276dee`). PR creation deferred per extreme cost-aware tier; the branch sits on origin until rate recovers OR a later tick has budget. End.