adds win arm64 test/build stages to v2 pipeline

[Prathik Rao (prathikr)]

Gives us complete testing coverage across all our targeted platforms

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Project	Deployment	Actions	Updated (UTC)
foundry-local	Ready	Preview	Aug 3, 2026 10:49pm

[Copilot]

Pull request overview

Adds native Windows ARM64 build and test coverage across the v2 SDK pipeline.

Changes:

• Enables Windows ARM64 C++, C#, Python, and JavaScript builds/tests.
• Bootstraps required Windows tooling, runtimes, Azure CLI, and test data.
• Adds ARM64 Python loading and more tolerant ASR assertions.

Reviewed changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
sdk_v2/python/src/foundry_local_sdk/_native/lib_loader.py	Resolves Windows ARM64 native libraries.
sdk_v2/js/package-lock.json	Updates native dependency metadata.
sdk_v2/cs/test/FoundryLocal.Tests/Utils.cs	Adds transcript normalization helper.
sdk_v2/cs/test/FoundryLocal.Tests/AudioSessionTests.cs	Uses semantic transcript assertions.
sdk_v2/cs/test/FoundryLocal.Tests/AudioClientTests.cs	Relaxes ASR output checks.
.pipelines/v2/templates/steps-test-python.yml	Supports ARM64 Python testing.
.pipelines/v2/templates/steps-test-js.yml	Supports Windows ARM64 JavaScript tests.
.pipelines/v2/templates/steps-test-cs.yml	Supports Windows ARM64 C# tests.
.pipelines/v2/templates/steps-prefetch-nuget.yml	Makes the PowerShell host configurable.
.pipelines/v2/templates/steps-build-windows.yml	Enables native ARM64 C++ builds/tests.
.pipelines/v2/templates/steps-build-python.yml	Builds Python wheels natively on ARM64.
.pipelines/v2/templates/steps-build-js.yml	Builds Node addons on Windows ARM64.
.pipelines/v2/templates/stages-python.yml	Adds native ARM64 Python stages.
.pipelines/v2/templates/stages-js.yml	Adds native ARM64 JavaScript stages.
.pipelines/v2/templates/stages-cs.yml	Adds the ARM64 C# test stage.
.pipelines/v2/templates/stages-build-native.yml	Moves native builds/tests to ARM64 agents.
.pipelines/templates/fetch-test-data-from-blob.yml	Bootstraps Azure CLI and AzCopy on ARM64.

Files not reviewed (1)

• sdk_v2/js/package-lock.json: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 5 comments.

Suppressed comments (1)

sdk_v2/cs/test/FoundryLocal.Tests/Utils.cs:50

• This does not normalize all whitespace as the comment promises: tabs and newlines are preserved by Append but Split only separates on a literal space, so an otherwise valid phrase spanning a line break will fail. Split on the framework's default whitespace set instead.

        return string.Join(" ", normalized.ToString().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries));