alkstore/tasks/pg-suite-infra-hardening.md

id, name, status, depends_on, scope, risk, impact, level, tags

id	name	status	depends_on	scope	risk	impact	level	tags
pg-suite-infra-hardening	Postgres test-infra hardening — F-1's defense-in-depth candidates	pending		single	low	isolated	implementation	wave-5 postgres-engine tests

Description

Land the defense-in-depth test-infra hardening the wave-4 review recorded for F-1 (tasks/review-wave-4.md Notes) — explicitly not load-bearing since pg-fix-tx-wake retired F-1's engine-side root cause (the compose test is deterministic, 20/20 solo runs green at the fix-batch gate). This task exists because wave 5 was the named home ("wave 5's suite hardening, or a wave-5-adjacent test-infra task") and the candidates are cheap; if the wave-5 window gets tight, cancelling this task loses nothing but insurance.

Work (the review's candidate dispositions, cheapest first):

• (a) Harden must_recv_event's deadline — replace the 20 ms polling loop with a parked recv().await under a timeout wrapper; the deadline assert still bounds the property, the poll-loop's wake-subscription interaction surface goes away.
• (b) A LOG_LAGGED-style diagnostic counter on the bridge — discriminates "wake never arrived" from "wake arrived, re-drain missed" if a wake-shaped flake ever recurs. Land only if it is a small, honest addition (a test-observation counter, #[cfg(test)]- gated or eprintln-postured per the house test style); skip and record if it wants more machinery than that.

Candidate (c) (leave the skip-posture as-is) is the do-nothing arm — adopted by default for anything not landed.

Acceptance Criteria

• must_recv_event parks on recv().await under a timeout wrapper (no polling loop); the pg stream tests stay green against the harness server (a full stream-module run)
• Candidate (b) either landed small or recorded as skipped with the reason
• cargo test -p alkstore-postgres green (server-less skips clean); clippy -D warnings; fmt clean

References

• tasks/review-wave-4.md (F-1's Notes — the candidate dispositions)
• tasks/review-wave-4-fixes.md (F-1 retired; defense-in-depth posture)
• tasks/pg-fix-tx-wake.md (the engine-side fix that made this non-load-bearing)

Notes

To be filled by implementation agent

Summary

To be filled on completion