diff --git a/docs/hygiene-history/ticks/2026/05/15/1757Z.md b/docs/hygiene-history/ticks/2026/05/15/1757Z.md
new file mode 100644
index 0000000000..bd19b5f2ff
--- /dev/null
+++ b/docs/hygiene-history/ticks/2026/05/15/1757Z.md
@@ -0,0 +1,48 @@
+# Tick 1757Z — 4-tick parallel-audit pattern; Vera MEMORY.md attribution Otto → Lior corrected
+
+## Headline
+
+- [PR #3533](https://github.com/Lucent-Financial-Group/Zeta/pull/3533) (1749Z shard) MERGED → `ae5dc2e` on main… wait, that's #3530. Let me re-check: actually [PR #3530](https://github.com/Lucent-Financial-Group/Zeta/pull/3530) was peer-Otto's 1737Z shard. My 1749Z shard merged as part of that recent burst. Main HEAD: `ae5dc2e` (peer-Otto 1737Z).
+- [PR #3529](https://github.com/Lucent-Financial-Group/Zeta/pull/3529) (Codex P2 backlinks fix) — auto-merge armed, wait-CI.
+- **Speculative-work catch (4th in a row)**: review-thread audit on PR [#3516](https://github.com/Lucent-Financial-Group/Zeta/pull/3516) (Vera §33 migration) surfaced 3 unresolved threads.
+- 2 threads were "file-existence" complaints — valid AT TIME of authoring (Vera PR opened before Riven landed), now resolved by main state. Replied with substrate-honest explanation + resolved.
+- 1 thread was a **real attribution bug**: Vera MEMORY.md said "drift caught by Otto" but archive content says **Author: Lior (Antigravity check node)**. Fixed in [PR #3535](https://github.com/Lucent-Financial-Group/Zeta/pull/3535) — single 1-line correction. Auto-merge armed (MERGEABLE).
+- Cron sentinel `575d1226` live.
+
+## 4-tick parallel-audit pattern
+
+| Tick | Speculative work | Finding | Fix |
+|---|---|---|---|
+| 1718Z | Survey §33 cascade state | Surfaced docs/research/ residuals (78/16/8) | Held (content-id required) |
+| 1731Z | Audit own MEMORY.md authoring | 2 off-by-one PR citations | PR #3526 (merged) |
+| 1749Z | Audit post-merge review activity | Codex P2 dead-xref on PR #3513 | PR #3529 (open) |
+| **1757Z** | **Continue review-thread audit** | **Copilot caught Otto→Lior attribution bug + 2 stale-pointer threads** | **PR #3535 (open) + 3 threads resolved** |
+
+The pattern compounds: each tick's audit work surfaces real follow-ups. The discipline is recursive across multi-tick spans, not just within-tick.
+
+## Substrate-honest meta-note: thread-resolution discipline
+
+Resolving threads with **substantive replies** (not just clicking "resolve") creates the substrate trail that future-Otto can read. Each resolution above includes:
+
+1. **Why thread was technically valid** (file-existence threads: were valid at authoring time)
+2. **What changed since** (PR #3513 merged → file now reachable on main)
+3. **OR for real bugs**: link to follow-up fix PR
+
+This is bidirectional-glass-halo applied at thread-resolution scope: the reviewer (Codex, Copilot) sees their finding was understood, addressed, and acknowledged; future-Otto reading the thread sees the reasoning + follow-up trail.
+
+## Per-tick discipline trace
+
+1. **Refresh**: `gh pr view` confirmed PR #3533 MERGED, #3529 wait-CI.
+2. **Holding-discipline**: #3529 named-dependency, bounded ETA → parallel speculative work per never-be-idle.
+3. **Pick work**: continue post-merge review-thread sweep across recent merged PRs.
+4. **Verify**: `git show` of archive content confirmed Lior attribution; `gh api graphql` confirmed 3 unresolved threads.
+5. **Shard**: this file.
+6. **CronList**: sentinel live.
+7. **Visibility**: PR #3535 + 3 thread resolutions + this shard.
+
+## Composes with
+
+- [`.claude/rules/holding-without-named-dependency-is-standing-by-failure.md`](../../../../../../.claude/rules/holding-without-named-dependency-is-standing-by-failure.md) — parallel-audit-while-CI compounds
+- [`.claude/rules/blocked-green-ci-investigate-threads.md`](../../../../../../.claude/rules/blocked-green-ci-investigate-threads.md) — applies post-merge too; threads don't auto-disappear when PR merges
+- [`.claude/rules/glass-halo-bidirectional.md`](../../../../../../.claude/rules/glass-halo-bidirectional.md) — substantive replies vs silent-resolve
+- [`.claude/rules/honor-those-that-came-before.md`](../../../../../../.claude/rules/honor-those-that-came-before.md) — Lior's antigravity-check authorship preserved correctly in the persona index