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experiment: Agent macOS 27 builds on Blacksmith (do not merge) - #1308
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Experiment only, not for merge. Checks whether the Agent's macOS 27 work can stay on Blacksmith instead of GitHub's xcode-27 image: - Export Xcode 27.1's Metal Toolchain on GitHub xcode-27, import it on blacksmith-6vcpu-macos-27, compile a shader, then build the Agent workspace cold with compiled Metal shaders. - Without any Metal Toolchain, run the Agent app clippy with gpui's runtime_shaders feature. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Experiment only. Checks that blacksmith-16vcpu-ubuntu-2404 and blacksmith-32vcpu-ubuntu-2404 provision without a pre-created scale set, and times a cold Agent clippy and test build on each size. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Experiment only — do not merge. Based on PR #1266 (Xcode 27.1 for the Apple lanes), which moved the Agent's macOS builds from Blacksmith to GitHub's
xcode-27image: Blacksmith's macOS 27 image lacks the Metal Toolchain for Xcode 27.1, andxcodebuild -downloadComponent MetalToolchainfails there ("Failed fetching catalog"). On GitHub's runner the Agent Dev build took about 40 min, against 12–15 on Blacksmith.One workflow,
.github/workflows/macos27-blacksmith-experiment.yml, with two arms:export-metal(GitHubxcode-27) exports Xcode 27.1's Metal Toolchain withxcodebuild -downloadComponent metalToolchain -exportPath.blacksmith-imported-metal(blacksmith-6vcpu-macos-27) imports it withxcodebuild -importComponent, compiles a probe shader, then runs a coldcargo build --workspace --all-targetsof the Agent, which compiles gpui's Metal shaders.blacksmith-runtime-shaders(blacksmith-6vcpu-macos-27) runs a coldcargo clippy -p maple-agent-app --all-targetswith gpui'sruntime_shadersfeature, which skips build-time shader compilation. That would be enough for PR check lanes.test_nix_workflows.py(install count) andtest_select_xcode.py(selector inventory) are updated only so the repository checks stay green.Local validation: both tests pass with yq-go;
actionlintpasses on the new workflow; the pre-commit repo lane passed (569 tests).🤖 Generated with Claude Code
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