Add native Windows ARM64 pairing compatibility experiment by omry · Pull Request #34 · omry/arbiter

omry · 2026-10-18T16:48:27Z

Wheel-only dependency resolution cannot establish whether Python/Go pairing works on Windows ARM64. Add an isolated Noise PSK probe and run it in the existing native CI job, reusing its OpenSSL setup and allowing Python source builds.

Keep experiment dependencies and Go 1.26 setup separate from the product. Verify native interpreter/toolchain architecture and retain environment, build and test evidence as an artifact. The portable harness covers both roles and 13 compatibility/negative-test groups.

Validation:

All 13 groups pass locally on Linux; go vet, Python syntax/format checks, product type checks and actionlint pass.
Native Windows ARM64 CI passed all 13 groups on CPython 3.13.16 and Go 1.26.9, with CGo disabled and exact experiment dependency pins. The experiment step took 29 seconds.
The native install reused a cached ARM64 crypto wheel. This proves installation and execution with the existing CI setup, without claiming package-index wheel availability or a fresh source build by this step.
Evidence artifact: pairing-noise-windows-arm64 in CI run 39146689439 (artifact ID 12143363252).

This experiment does not select production authentication dependencies or change package behavior. Other native platform/Python combinations, library security/maintenance assessment and production Go 1.24 compatibility remain open. The authentication draft and backlog edits are outside this PR.

Wheel-only dependency resolution cannot establish whether Python/Go pairing works on Windows ARM64. Add an isolated Noise PSK probe and run it in the existing native CI job, reusing its OpenSSL setup and allowing Python source builds. Keep experiment dependencies and Go 1.26 setup separate from the product. Verify native interpreter/toolchain architecture and retain environment, build and test evidence as an artifact. The portable harness covers both roles and 13 compatibility/negative-test groups. Validation: isolated Linux runner and all 13 test groups pass; go vet, Python syntax/format checks and actionlint pass. Native Windows ARM64 execution is pending CI. This experiment does not select production authentication dependencies or change package behavior.

gitar-bot · 2026-10-20T10:10:13Z

CI failed: One unrelated Python 3.11 unit-test timeout: `test_invalid_declared_length_is_rejected_while_capacity_is_full[65-413]` timed out waiting for blocking-worker capacity to free after cleanup. The other 1,138 tests passed; the failure is not linked to this Windows ARM64 pairing experiment.

Overview

The analysis covers 1 unique error template from 1 log. The Python 3.11 compat nox session failed on a single unit test timeout, and the rest of the suite passed (1,138 passed, 2 skipped).

Failures

Timeout in operation body admission test while blocking-worker capacity is full (confidence: high)

Type: test
Affected jobs: 118572268704
Related to change: no
Root cause: server/tests/unit/test_operation_body_admission.py::test_invalid_declared_length_is_rejected_while_capacity_is_full[65-413] times out in its available(app) retry after the test cancels and joins its reader. The log does not show whether the application fails to release capacity on cancellation or the test's cleanup/synchronization waits for a condition that cannot occur. The PR only adds a native Windows ARM64 pairing experiment and a workflow change, with no evidence connecting it to server admission logic.
Suggested fix: Check whether blocking-worker capacity is released on the reader cancellation path. If the server is correct, fix the test's cleanup or synchronization. Rerun the affected test and the Python 3.11 compat session.

Summary

Change-related failures: None. The single failure is marked unrelated to this PR.
Infrastructure/flaky failures: None identified. The timeout may be flaky, but the log does not establish that.
Recommended action: Treat this as a pre-existing or independent test issue. Investigate the capacity-release or test-synchronization behavior separately from this PR, then rerun the Python 3.11 compat session to confirm.

Code Review ✅ Approved

🟡 Medium risk · The isolated Noise probe and Go 1.26 CI setup could make Windows ARM64 validation fail if dependencies or builds are incompatible.

Adds an isolated Noise PSK pairing probe for Windows ARM64, run in the existing native CI job with reused OpenSSL setup and Python source builds allowed. Experiment dependencies and Go 1.26 setup stay separate from the product, and the 13 compatibility/negative-test groups plus environment and build evidence are retained as an artifact. No issues found.

Verification

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omry · 2026-10-20T10:15:46Z

PR-cycle state — maintained automatically. Do not edit by hand.

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chatgpt-codex-connector · 2026-10-20T10:17:07Z

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-20T10:21:06.278281Z	`b02cf0c`	Manual request
🔒 Security Review	✅ Completed 2026-10-20T10:19:27.355577Z	`b02cf0c`	Draft marked ready

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omry · 2026-10-20T10:18:59Z

@codex, regular review b02cf0c

chatgpt-codex-connector · 2026-10-20T10:21:04Z

Codex Review: Didn't find any major issues. Chef's kiss.

Reviewed commit: b02cf0c9fb

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omry closed this Oct 18, 2026

omry reopened this Oct 20, 2026

omry force-pushed the pr34 branch from 94994fa to b02cf0c Compare October 20, 2026 10:09

omry added this pull request to stack #42 October 20, 2026 10:09

omry marked this pull request as ready for review October 20, 2026 10:16

omry removed this pull request from stack #42 October 20, 2026 11:01

omry closed this Oct 20, 2026

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Add native Windows ARM64 pairing compatibility experiment - #34

Add native Windows ARM64 pairing compatibility experiment#34
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Overview

Failures

Timeout in operation body admission test while blocking-worker capacity is full (confidence: high)

Summary

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Timeout in operation body admission test while blocking-worker capacity is full (confidence: high)

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