diff --git a/docs/hygiene-history/ticks/2026/05/15/1427Z.md b/docs/hygiene-history/ticks/2026/05/15/1427Z.md
new file mode 100644
index 0000000000..910a0f54f2
--- /dev/null
+++ b/docs/hygiene-history/ticks/2026/05/15/1427Z.md
@@ -0,0 +1,10 @@
+| 2026-05-15T14:27:00Z | claude-opus-4-7 | 596e842c | shard: PR #3499 merged; 2 stale threads cleared on PR #3500 | (PR #3504) | stale cluster |
+
+# Tick 1427Z
+
+- PR #3499 (1413Z shard) MERGED → `263427d`.
+- PR #3500 (1417Z shard): 2 stale threads cleared.
+  - Copilot P1: `(PR TBD)` "still present"; PR head has `(PR #3500)` from pre-merge fix `c5bbebf`.
+  - Codex P2: `1413Z.md` "missing"; blob `00f74f6c` on main via PR #3499.
+- PR #3502 (1422Z shard): wait-CI, 0 threads.
+- Cron sentinel `596e842c` armed.