feat(release): Intel macOS and Windows arm64 tsc

[t3dotgg]

Problem

T3 Code #16704 switches the typecheck to tsc-rs. tsc-rs 0.2.0 has no binary for Intel Macs or Windows, so on those platforms the T3 Code launcher falls back to the old compiler. #33 added Windows x64. Intel Macs and Windows arm64 were still missing.

Fix

• release.yml builds two more platforms, the same way as the others: the plain build, the PGO build trained on its own platform (pgo-train.sh), the PGO-against-plain check, the platform npm package, an archive and a verify job that installs the npm tgz and runs tsc-rs.
  • darwin-x64 (x86_64-apple-darwin) on GitHub's macos-15-intel. Blacksmith has no Intel Mac.
  • win32-arm64 (aarch64-pc-windows-msvc, +crt-static) on GitHub's windows-11-arm (free for public repos). Blacksmith has no arm64 Windows.
• win32-arm64 links with the toolchain's rust-lld. On arm64, link.exe aligns each section contribution to 4 bytes, also the 1-byte start markers of the LLVM profile sections. The instrumented tsc then wrote 3 zero bytes before the function names, and llvm-profdata rejected every profile ("symbol name is empty"). The PDB section contributions and the .lprfn bytes of the instrumented tsc show it. lld-link keeps the 1-byte alignment, as link.exe does on x64.
• Each PGO training run writes its own profile file (pgo-train.sh, PGO_PROFILE_DIR from build-pgo.sh). rustc's default -Cprofile-generate name (default_%m.profraw) has no PID, so every run merged into one file inside the profile runtime, on every platform. That runtime merge crashed on arm64 Windows (access violation in lprofMergeValueProfData, cdb stack). Linux and macOS now write 12 to 16 files instead of 1; the merged profile sizes and the PGO-against-plain check are the same.
• The verify job checks that Node's process.platform-process.arch matches the package, so an emulated Node cannot hide a wrong package.
• The build timeout goes from 120 to 180 minutes for the 4 vCPU GitHub-hosted runners. darwin-x64 takes about 63 minutes, win32-arm64 about 53.
• ci.yml: the macOS test job cross checks the tsc for x86_64-apple-darwin (33 s), so a PR that breaks Intel macOS fails in CI.
• Docs and npm/trust-setup.sh list the 7 packages. Run npm/trust-setup.sh before the next tag: @tsc-rs/darwin-x64, @tsc-rs/win32-arm64 (and @tsc-rs/win32-x64 from feat(release): Windows x64 tsc and a Windows CI job #33) are new on npm.

No Rust changes.

Runs

Head 1219df8f5:

• Release 38019998692: green. All 7 builds (PGO, PGO-against-plain check) and all 7 verify jobs pass. darwin-x64 build 63 min, win32-arm64 build 53 min.
• CI 38019998689: green. The x86_64-apple-darwin check passes on the macOS job.

Earlier runs on this PR:

• Release 38007891677: win32-arm64 training crashed (exit 139) on the second run.
• Diagnosis 38010948002 (temporary branch): the plain win32-arm64 tsc passes the training set. The instrumented one crashes in lprofMergeValueProfData (cdb).
• Release 38013239266: with one profile file per run, llvm-profdata rejected all 12 profiles ("symbol name is empty").
• Diagnosis 38015825984: with rust-lld, the names start right after the marker byte and llvm-profdata reads 63,989 functions.
• Release 38015811497: all 7 builds pass. Both Windows verify jobs failed on tee /dev/stderr (no /dev/stderr in Git Bash on Actions). Fixed.

This PR was made by Claude Opus 5.5 in Claude Code (workflow agent).

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added support for macOS x64 and Windows ARM64, expanding the platforms available for the upcoming release.
• Documentation
  • Updated the platform support and installation information to include macOS x64, Linux ARM64, and Windows ARM64.
  • Updated release guidance to cover packaging and publishing for the expanded platform set.

Note

Add Intel macOS and Windows arm64 tsc release builds

• Expands the release build matrix in release.yml with darwin-x64 (macos-15-intel) and win32-arm64 (windows-11-arm) native runners, and raises the build timeout to 180 minutes.
• Adds platform-specific npm packages and standalone archives, plus verify, publish, and trusted-publishing entries for both new platforms in trust-setup.sh and release.yml.
• Adds a macOS CI step in ci.yml that cargo-checks the tsgo binary against the x86_64-apple-darwin target.
• PGO changes: build-pgo.sh exports PGO_PROFILE_DIR to custom training commands, and pgo-train.sh writes a separate LLVM profile file per training run and aborts with exit code 3 when a project directory change fails.
• Behavioral Change: Windows arm64 builds use the Rust rust-lld linker instead of the default linker; PGO training no longer treats a failed cd as an expected compiler diagnostic.

^{Macroscope summarized 271f600.}

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Team
• Run ID: fe86cb7b-9640-4f47-9c9a-337cd7591d95

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📥 Commits

Reviewing files that changed from the base of the PR and between 1219df8 and 271f600.

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📒 Files selected for processing (2)

• .github/workflows/release.yml
• scripts/goport/pgo-train.sh

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🚧 Files skipped from review as they are similar to previous changes (1)

• .github/workflows/release.yml

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Walkthrough

The release workflow adds macOS x64 and Windows arm64 builds, package verification, and publishing. Project documentation and trusted-publishing setup list the added platforms. PGO training now passes and uses the profile directory.

Changes

Platform package expansion

Layer / File(s)	Summary
Add target builds and CI checks .github/workflows/ci.yml, .github/workflows/release.yml	CI checks the Intel macOS target. The release matrix adds macOS x64 and Windows arm64 builds, with rust-lld configured for Windows arm64.
Package, verify, and publish targets .github/workflows/release.yml	The workflow packages and publishes both targets. Verification runs on matching-architecture runners and checks Node's platform and architecture against the matrix.
Update platform and publishing instructions README.md, npm/README.md, npm/tsc-rs-readme.md, npm/trust-setup.sh	Documentation and trusted-publishing setup include the added platform packages.

PGO profile handling

Layer / File(s)	Summary
Pass and select PGO profile paths crates/ts_goport/scripts/build-pgo.sh, scripts/goport/pgo-train.sh	The custom training command receives PGO_PROFILE_DIR. Compiler invocations set LLVM_PROFILE_FILE to a per-project, per-run path when that directory is set.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant GitHubActions
  participant BuildRunners
  participant PlatformArchives
  participant VerificationRunners
  participant NpmRegistry
  GitHubActions->>BuildRunners: Build platform binaries
  BuildRunners->>PlatformArchives: Package Darwin x64 and Windows ARM64 binaries
  PlatformArchives->>VerificationRunners: Provide packages for installation checks
  VerificationRunners->>VerificationRunners: Check Node platform and architecture
  GitHubActions->>NpmRegistry: Publish platform packages

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Merge Risk: ⚪ Minimal · up to 271f6

The new macOS Intel and Windows ARM64 packages are connected to their build, verification, and publishing paths, and PGO profiles are directed to the merge step. No concrete merge-blocking issue is apparent; proceed with normal CI and release validation.

Pre-merge checks | 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage		Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 3 files. (1 skipped: 1 …
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly identifies the release change for Intel macOS and Windows arm64 support. It matches the main objective of the pull request.

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