---------- Forwarded message ---------
From: Nathalie Chan King Choy 
Date: Sunday, 5 July 2026 at 19:23:27 UTC-7

Hi all,

The notes from the 6/30 call are below.  Please let us know if you spot any errors or important omissions.

Thanks & regards,
Nathalie
--
CoreCollective Community Manager
Android & WoA working groups 

Attended:
Saket J
John S
Randy L
Anthony R
Mayank A
Dave W
Nathalie CKC
Gleb K
Evgeny K
Omair J
Jillian B

AI Notes:
Meeting Overview

  • The meeting focused on Python upstreaming progress, along with LLVM and GCC toolchain work for Windows on Arm.

  • The group discussed ongoing challenges with unresponsive upstream project maintainers delaying pull request merges.


Key Decisions Made

  • Python Upstreaming Prioritization: Idled down active LLVM optimization work & Works on WoA website work  to redirect engineering efforts toward Python upstreaming and dependency enablement.

  • Numba Model Workaround: Using a small code model configuration within LLVM Lite to manage Numba just-in-time compilation , bypassing an immediate requirement for native COFF large code model support from Microsoft.

  • ARMv7 Linux Release Discontinuation: Planning to discontinue ARMv7 Linux releases in subsequent LLVM release cycles, unless someone decides to sponsor continuation.

  • Repository Access Guidelines: [Deferred] Documenting specific criteria for collaborator access levels on the Core Collective repository was deferred since very few users currently require write access.


Action ItemsGleb Khmyznikov

  • Contact the internal Microsoft team that previously worked on Torch for Windows on Arm to determine why the packages are missing from PyPI.

  • Inquire internally at Microsoft about potential engineering contacts or options to advance the OpenAI TikToken pull request.

  • Share the technical details of the LLVM code model issue internally to discuss native support requirements.

  • Receive the list of stalled packages from Mayank Agrawal to forward to Anaconda contacts once their infrastructure is ready.


Omair Javaid - Linaro

  • Send detailed technical notes regarding the LLVM code model and COFF file format limitations to Gleb Khmyznikov.

  • Monitor ongoing testing and provide support if needed for the small code model implementation.

  • Collaborate with the group in the coming days to troubleshoot compiler and LLVM-specific issues for Python libraries.


Qualcomm Team / Mayank Agrawal

  • Conduct testing from the Qualcomm side to ensure the small code model works cleanly across the test suite.

  • Begin working on the Windows on Arm enablement for Librosa and Shap now that Numba is available.


Dave Whaley

  • Provide links from the Microsoft Build conference announcements to add to the Working Group repository landing page.


For Future

  • LLVM 23 Release: Release Candidates expected in two weeks and the final release out in about a month.

  • Seek help from Anaconda: We should create a list of packages that are stuck for months without response from maintainers.  Anaconda might be interested in supporting this effort.  Gleb is this WG’s interface with Anaconda.


NotesPython Upstreaming & Unresponsive Maintainers

  • Anthony noted that many project maintainers are completely ignoring all pull requests across their repositories, rather than ignoring Windows on Arm specific submissions.

  • The pool of open projects has shrunk, making the remaining unresponsive maintainers a more noticeable bottleneck for enablement work.

  • Anthony clarified that the Jellyfish pull request was mistakenly submitted to a dead GitHub mirror instead of the author's primary repository.


SGLang & PyTorch Blockers

  • Anthony is currently trying to get SGLang to build on Windows on Arm.

  • Torch builds Windows on Arm nightlies successfully, but these packages are not uploaded to PyPI.

  • Manually downloading and installing the nightly Torch wheel allows the SGLang installation to proceed.


LLVM Code Models & Numba Resolution

  • Numba acts as a just-in-time compiler that utilizes LLVM Lite to translate Python into LLVM IR.

  • The toolchain previously encountered errors because LLVM Lite used a large code model, which lacks support in the COFF object file format for AArch64.

  • Moving to a small code model resolved the build issue and has been officially approved by the PR reviewer.

  • Evgeny Karpov noted that using the small code model functions as a workaround, and the issue might reoccur if code differences scale beyond a 4 GB address space.


GCC & Toolchain Pipelines

  • The LLVM Windows on Arm release pipeline has been fully automated via GitHub Actions and is funded by the LLVM Foundation.

  • Evgeny Karpov reported that a recent regression in the MinGW library was caught and successfully validated with a patch that will be merged upstream soon.


Working Group Repository Governance

  • https://github.com/CoreCollective-dev/windows-on-arm-wg

    • Gleb Khmyznikov has been granted write access

    • No one else in the WG has requested write access yet - let Nathalie know if needed

    • Once we have more folks requesting write access we should discuss governance for external contributor roles