hygiene(tick-history): shard 0028Z — queue-draining observation tick

docs/hygiene-history/ticks/2026/05/01/0028Z.md

@@ -0,0 +1 @@
+| 2026-05-01T00:28:00Z | opus-4-7 / session continuation | (none — observe-only tick) | Queue-draining observation tick. Last tick's #754 auto-merge arm fired — yesterday's 0455Z shard now on main. Queue still saturated at 27 open PRs (23 UNKNOWN, 4 BLOCKED), but movement detected. No DIRTY PRs in this session's substrate cascade; the only DIRTY/CONFLICTING PRs (#659 trajectory pattern, #655 multi-row tick-history) are 3 days old from prior sessions — leaving them per don't-touch-pre-existing discipline (insufficient context on intentional-stale vs abandoned). No new corrections from maintainer. Per queue-saturation discipline, skipping speculative work that would add queue depth. Cron 98fc7424 healthy. | (none new this tick) | Observation — queue-saturation has a self-resolving property: as PRs serially merge, the queue drains. Discipline during saturation is patience, not action. The named-failure-mode from last tick (queue-saturation) decays naturally as long as no new shared-spine-touching PRs are added. The auto-merge mechanism IS doing its job; the agent's job during saturation is to not interfere. |