## Why
We want to exercise a linux app-server against a windows exec-server
without having to repeat every test case. This approach has slight
precedent in the remote docker test setup.
## What
Run the shared `codex-core` integration suite against Windows
exec-server behavior from Linux. This makes cross-OS path and shell
regressions visible while keeping unsupported cases owned by individual
tests.
- Add `local`, `docker`, and `wine-exec` test environment selection with
legacy Docker compatibility.
- Extend `codex_rust_crate` to generate a sharded Wine-exec variant
using a cross-built Windows server and pinned Bazel Wine/PowerShell
runtimes.
- Teach remote-aware helpers about Windows paths and track temporary
incompatibilities with source-local `skip_if_wine_exec!` calls and
follow-up reasons.
## Summary
- Bump the workspace Rust toolchain from `1.93.0` to `1.95.0` across
Cargo, Bazel, CI, release workflows, devcontainers, and the Codex
environment config.
- Refresh `MODULE.bazel.lock` so the Bazel Rust toolchain artifacts
match the new version.
- Leave purpose-specific toolchains unchanged, including the
`argument-comment-lint` nightly and the upstream `rusty_v8` `1.91.0`
build pin.
- Includes fixes for new lints from `just fix` and a few codex-authored
fixes for lints without a suggestion.
## Why
`rust-ci-full` was paying the full Cargo nextest build-and-run cost once
per platform, with Windows ARM64 as the long pole. This change moves the
heavy work into one reusable per-platform flow: build a nextest archive
once, then replay it across four shards so the platform lane spends less
time running tests serially. For Windows ARM64, the archive is
cross-compiled on Windows x64 and replayed on native Windows ARM64
shards so the slow ARM64 machine is used for execution rather than
compilation.
## What changed
- split the `rust-ci-full` nextest matrix into five explicit
per-platform reusable-workflow calls
- add `.github/workflows/rust-ci-full-nextest-platform.yml` to build one
archive, upload timings/helpers, replay four nextest shards, upload
per-shard JUnit, and roll the shard status back up per platform
- add Windows CI helpers for Dev Drive setup and MSVC ARM64 linker
environment export so the Windows ARM64 archive can be produced on
Windows x64
- keep the existing Cargo git CLI fetch hardening inside the reusable
workflow, since caller workflow-level `env` does not flow through
`workflow_call`
- document the archive-backed shard shape in
`.github/workflows/README.md`
- raise the default nextest slow timeout to 30s so the sharded full-CI
path does not treat every >15s test as stuck
## Verification
- validated the archive/shard flow with live GitHub Actions runs on this
PR branch
- Windows ARM64 cross-compile latency on completed runs:
- https://github.com/openai/codex/actions/runs/26118759651: `34m30s`
lane e2e, `17m16s` archive build, `9m55s` shard phase
- https://github.com/openai/codex/actions/runs/26120777976: `30m36s`
lane e2e, `17m21s` archive build, `6m50s` shard phase
- comparable pre-cross-compile sharded Windows ARM64 runs were `55m01s`,
`50m21s`, and `46m42s`, so the completed cross-compile runs improved the
lane by roughly `12m` to `24m` versus the prior range
- latest corrected cross-compile run:
https://github.com/openai/codex/actions/runs/26120777976
- Windows ARM64 archive built successfully on Windows x64
- native Windows ARM64 shards started immediately after the archive
upload
- 3/4 Windows ARM64 shards passed; the failing shard hit the same
existing `code_mode` test failure seen outside this lane
- downloaded failed-shard JUnit XML from the validation runs and
confirmed the remaining red is from known test failures, not
archive/shard wiring
- no local Codex tests run per repo guidance
## Notes
- this PR does not change developers.openai.com documentation
Adam Perry @ OpenAI ·
starr-openai ·