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Summary

• build Windows ARM64 wheels on the native windows-11-arm runner
• target aarch64-pc-windows-msvc with the runner's native Clang toolchain
• build wheels for CPython 3.11, 3.12, 3.13, 3.14, and free-threaded 3.14
• publish the resulting artifact through the existing wheels-* release path

Validation

• actionlint .github/workflows/build_wheels.yml
• hosted dry-run Windows ARM64 job: passed on windows-11-arm for the complete interpreter matrix
• locally built outlines_core-0.2.14-cp313-cp313-win_arm64.whl
• verified the extension uses PE machine 0xAA64
• installed the wheel outside the source checkout and ran python -m pytest --cov=outlines_core -vv: 45 passed, 2 skipped

Local validation used native CPython 3.13 ARM64, Rust aarch64-pc-windows-msvc, LLVM Clang ARM64, and MSVC ARM64. The hosted Windows ARM64 job validated wheel builds for CPython 3.11 through 3.14, including free-threaded 3.14. No package has been published by this PR.

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Hi @RobinPicard , I'm from Microsoft and recently I'm working on improving Python ecosystem support for Windows on Arm.
So I adds CI support for Windows ARM64. Could you please help to review? Thanks.

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Hi @RobinPicard , I'm from Microsoft and recently I'm working on improving Python ecosystem support for Windows on Arm. So I adds CI support for Windows ARM64. Could you please help to review? Thanks.

Hi @RobinPicard , gentle ping for PR review. Thanks!

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Hi @RobinPicard @rlouf I see you are recent pr approvers, please take a look at this, thanks