Follow-up to commit `029329af`: a verification sweep (5×) showed
the `pcm.size > warmupSamples` hard floor on
`chromium_listener_speaker_hot_swap_does_not_crash` flakes 3/5 —
empirical capture varies 2880–7680 samples (= 60–160 ms TOTAL),
straddling the 4800-sample warmup threshold. The browser-side
@moq/lite 0.2.x re-attach behaviour across `Active::Ended →
Active` is fundamentally unreliable; ANY hard floor that
excludes the regression mode ("swap killed the WT session
entirely") fail-flakes because the steady state itself sits
right at that threshold.
Per `2026-05-07-tighten-cross-stack-assertions.md`'s Risk § option
(a) — "If any scenario fail-flakes after tightening, [...] revert
the tightening on that scenario" — this commit reverts the
hot-swap floor to a documented soft-pass that prints to
System.err when triggered. T12 (group sequence carry across
hot-swaps) is still asserted by the hang-tier counterpart
(`speaker_hot_swap_does_not_crash` in `HangInteropTest`), which
hard-asserts the full post-swap window decodes the 440 Hz peak.
The deferred "browser hot-swap re-attach" follow-up in
`2026-05-06-cross-stack-interop-test-results.md` captures the
underlying @moq/lite client work that would let this scenario
become a hard-floor test in the future.
5/5 sweep × 22 tests = 110/110 hard-pass post-recalibration
(commits `04be38ad` + `029329af`). Marks
`2026-05-07-tighten-cross-stack-assertions.md` and the roadmap's
Priority 2 closed; documents the per-scenario floors that landed,
including the one weaker-than-specced floor on the browser
hot-swap (deferred follow-up). Priority 3 (CI gating) is now
unblocked.
Plans the path from 'infra shipped' to 'full coverage with
correct behaviours'. Five new plan docs in nestsClient/plans/:
1. 2026-05-07-t16-closure-roadmap.md — index + priority order.
Three sequential steps + one independent track.
2. 2026-05-07-moq-relay-routing-investigation.md (Priority 1)
— root-cause the moq-relay 0.10.x per-broadcast subscribe-
routing race. Step-by-step: capture relay-side trace, write
minimum reproducer, file upstream OR bump moq-relay version.
Smoking gun + hypotheses already in place from the
late-join-flake investigation; this plan turns that into
actionable next steps.
3. 2026-05-07-tighten-cross-stack-assertions.md (Priority 2)
— once the routing race is closed, replace the five soft-
pass scenarios in BrowserInteropTest with hard floors.
Lists each scenario, its current soft-pass behavior, and
the proposed hard threshold.
4. 2026-05-07-cross-stack-interop-ci-gating.md (Priority 3)
— re-add the hang-interop + browser-interop GitHub Actions
jobs that were dropped in 6829ab727 / b94737de7. Includes
the exact YAML to restore and a 10/10 sweep stability bar
before merge.
5. 2026-05-07-framespergroup-production-rerun.md (independent
track) — re-run the HCgOY two-phone field tests against
current nostrnests production at multiple framesPerGroup
values to settle whether the test pin (5) and production
default (50) can converge.
Estimated total: 2.5-3.5 days of focused work to fully close
T16. After these four: I7 post-reconnect cliff and I12 GOAWAY
remain open as genuinely upstream-territory items, tracked in
their existing investigation docs.
Claude