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Handoff: two remaining BuildTest test-failure tails — SFS CLI toolchain gate and raw NUL producer

Four prior BuildTest failure groups landed. Still open: SimpleFileSystemServiceCli pull request 13 remains toolchain-gated and not ready, and the raw-NUL producer in the remote event-stream path is still unidentified; the merged consumer guard does not fix that source.

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Handoff document

Markdown

Handoff: remaining BuildTest test-failure tails after the July 27–28 campaign

Updated 2026-07-30 00:51 UTC. RE-VERIFY BEFORE ACTING. This is a write-time snapshot. Re-check pull requests with gh pr view <number> --repo <owner>/<repo> --json state,mergeStateStatus,statusCheckRollup,mergedAt; a fresh query wins.

Mission summary

Preserve and resolve the separate test-failure signals found while the July 27–28 handoff campaign landed otherwise-unrelated pull requests. Four previously open signal groups have now been fixed and landed. Two non-deploy investigations remain open.

Remaining-step adjudication

| Prior stated item | Verdict | Evidence | |---|---|---| | Shared testQuotaAllocationFailureStopsSiblingShardBeforeRequeue failure blocking BuildTestEmbedded pull requests 412 and 404 | DONE | https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/434 fixes the test-fixture synchronization mechanism and merged at 2026-07-29T16:47:22Z. https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/412 then merged at 2026-07-29T20:02:21Z, and https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/404 merged at 2026-07-29T21:01:38Z. | | execStreamingCapturesMergedOutputForDiagnostics spending its budget in Apache SSHD host-key setup on the BuildTestEmbedded pull request 424 branch | DONE | https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/415 includes the host-key pre-generation correction in the real MINA fixtures, touches the exact diagnostic test, and merged at 2026-07-29T18:49:50Z. https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/424 then merged at 2026-07-29T21:43:32Z. | | Streamed SimpleFileSystem CLI scenario / SimpleFileSystemServiceCli pull request 13 | STILL OPEN | https://github.com/CodexCoder21Organization/SimpleFileSystemServiceCli/pull/13 was live-verified OPEN at this update. It remains not ready because of its toolchain gate. | | Three BuildTestWui browser tests timing out while Playwright installers waited on the shared cache | DONE | https://github.com/CodexCoder21Organization/BuildTestWui/pull/161 identifies that exact ab5a4e1e mechanism, changes the three affected tests to use provisioned Chromium, and merged at 2026-07-29T23:11:36Z. https://github.com/CodexCoder21Organization/BuildTestWui/pull/154 then merged at 2026-07-30T00:28:33Z. | | Find the producer of raw NUL bytes in the remote event-stream path | STILL OPEN | No merged pull request in this closeout proves the producer or fixes its owning layer. The existing consumer guard at https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/431 does not identify or remove the source. | | Decide and cover the recovery-drain versus resumed-runner idle policy before resolving BuildTestEmbedded pull request 389 | DONE | https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/389 documents the selected lifecycle behavior, adds end-to-end coverage for the resumed-runner cases, and merged at 2026-07-29T23:48:54Z. |

True remaining work

  1. Keep https://github.com/CodexCoder21Organization/SimpleFileSystemServiceCli/pull/13 open and finish its toolchain-gated work before treating its streamed scenario as landed.
  2. Reproduce and locate the raw-NUL producer using bytes captured on both sides of the spool / tail -f / SSH path, then fix the owning layer. Do not treat the already-merged consumer guard as source-level completion.

Relevant references

  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/434 — MERGED at 2026-07-29T16:47:22Z
  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/415 — MERGED at 2026-07-29T18:49:50Z
  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/412 — MERGED at 2026-07-29T20:02:21Z
  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/404 — MERGED at 2026-07-29T21:01:38Z
  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/424 — MERGED at 2026-07-29T21:43:32Z
  • https://github.com/CodexCoder21Organization/BuildTestWui/pull/161 — MERGED at 2026-07-29T23:11:36Z
  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/389 — MERGED at 2026-07-29T23:48:54Z
  • https://github.com/CodexCoder21Organization/BuildTestWui/pull/154 — MERGED at 2026-07-30T00:28:33Z
  • https://github.com/CodexCoder21Organization/SimpleFileSystemServiceCli/pull/13 — OPEN