hygiene(tick-history): first per-tick shard file (Option B transport, PR #724 dependency)

docs/hygiene-history/ticks/2026/04/29/0230Z.md

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+| 2026-04-29T02:30:00Z (autonomous-loop tick — first per-tick shard file; Option B implementation lands via PR #724; this shard exercises the new transport) | opus-4-7 / session continuation | 26f978a2 | **Material tick — task #276 architectural fix landing.** Aaron's 02:25Z message delegated the architectural call: *"this falls under your call, you can phone a friend if you want."* Per Amara's "do not let the fix become another turn of the flywheel" rule, made the call without phone-a-friend (which would itself be another turn). Decision: Option B (per-tick shard files). PR #724 lands the directory + README + AUTONOMOUS-LOOP.md step 5 update. THIS shard at `docs/hygiene-history/ticks/2026/04/29/0230Z.md` is the first concrete use of the new transport. The Liveness-Mechanism Flywheel cascade ends here — this shard has no EOF-append collision possibility because the file is unique per tick. PR #723 (Candidate-count Goodhart glossary entry) also in flight, batched with last tick's row. Cron `26f978a2` armed. | (PR #725 for this shard — first-shard PR) | Observation — meta-pattern: the discipline that produced the Liveness-Mechanism Flywheel diagnosis ALSO produced its fix. Naming the failure mode (Amara's catch) → attaching the criteria to #276 → Aaron's delegation → choice + implementation. The fix landed in 6 ticks from the diagnosis. The next interesting question is whether shard-file creation itself produces a different failure mode under load (lots of small files, generator pressure on cadence). That's tracked in #276 as follow-up. |