diff --git a/docs/hygiene-history/ticks/2026/04/29/0519Z.md b/docs/hygiene-history/ticks/2026/04/29/0519Z.md
new file mode 100644
index 000000000..c85e2501f
--- /dev/null
+++ b/docs/hygiene-history/ticks/2026/04/29/0519Z.md
@@ -0,0 +1 @@
+| 2026-04-29T05:19:35Z | claude-opus-4-7 | 26f978a2 | eighteenth tick — **bare-`main` rule landed on main**. PR #775 squash-merged at 05:19:23Z. 26 PRs total this session arc since corruption-triage closure. The bare-`main` automation rule went through **4 rounds of refinement**: round-1 (Amara initial — ambiguity + hard-stop); round-2 (multi-AI synthesis packet — orchestrator-vs-shell semantics + concurrency + shell-glob generalization + future-consolidation threshold); round-3 (Codex P2 — first-run-no-local-branch edge case, but my fix overcorrected); round-4 (Codex P1 — caught the round-3 overcorrection: `git switch refs/heads/main` non-detached is invalid). Final form lands the discipline correctly. Best preserved keeper: *"Topology is allowed. Ambiguity is expected. Continuing after fatal ambiguity is forbidden."* | [#775 merged](https://github.com/Lucent-Financial-Group/Zeta/pull/775), [#785](https://github.com/Lucent-Financial-Group/Zeta/pull/785) [#786](https://github.com/Lucent-Financial-Group/Zeta/pull/786) | Trajectory observation: PR #775's 4-round refinement is the canonical demonstration of multi-AI scaffold delivering on its agent-error-correction premise. The seven-step meta-loop fired four times on this single rule and each iteration tightened it further, including catching MY own overcorrection. The factory's substrate-quality outcome is materially better than what any single author would have produced. Session arc durable substrate landed (full list across 26 PRs): cold-readability rule + bare-`main` discipline + verbatim-preservation + Confucius cold-readability addendum + soulfile recalibration (text vs binary) + corruption-triage discipline + hard-stop pattern + paired-edit + audit-memory-index-duplicates lints. The factory is in genuine steady-state operational drain. |