✅ Review Complete: GitHub Actions Runner Migration

Review Summary

This PR successfully migrates from the deprecated macos-13 runner to macos-15-intel and standardizes Ubuntu runner references. The changes are well-motivated by GitHub's deprecation announcement and follow a consistent pattern across all workflow files.

Code Quality Assessment

✅ Positive Findings

• Consistent Migration Pattern: All 7 workflow files follow the same migration approach
• Complete Coverage: Only one macos-13 reference found and properly migrated (.github/workflows/release-build.yml:156)
• Ubuntu Standardization: Proper migration from explicit ubuntu-24.04 to ubuntu-latest alias
• Whitespace Cleanup: Minor formatting fixes (trailing spaces) improve consistency

⚠️ Areas Requiring Attention

1. Package Dependency Change (.github/workflows/populate_linux_sysroot.sh:20)

• Issue: Changed from gnupg2 to gnupg
• Impact: While gnupg is typically the standard package name, this unrelated change should be verified
• Recommendation: Confirm this change is intentional and test in CI environment

2. Runner Availability Verification

• Concern: macos-15-intel is a relatively new runner image
• Recommendation: Verify this runner is available in your GitHub environment (particularly for private repos or older organizations)

3. Testing Strategy

• Gap: No staged rollout or fallback mechanism if new runners encounter issues
• Recommendation: Monitor initial CI runs closely after merge

Architecture & Design

✅ Sound Decisions

• Future-Proofing: Migration ahead of December 4th, 2025 deadline shows good planning
• Standardization: Using ubuntu-latest instead of version-specific tags improves maintainability
• Minimal Scope: Focused changes reduce risk of introducing unrelated issues

📝 Considerations

• The migration maintains existing job matrices and dependencies correctly
• Build and test workflows remain functionally equivalent
• Cross-platform testing coverage is preserved

File-by-File Analysis

Final Recommendation

✅ APPROVE - This PR effectively addresses the macos-13 deprecation with a well-executed migration strategy. The only minor concern is the gnupg2 → gnupg change which should be verified but doesn't block approval.

The migration is timely, comprehensive, and maintains existing functionality while improving maintainability through standardization.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.10%. Comparing base (8959c83) to head (79f404a).
⚠️ Report is 18 commits behind head on main.

@@           Coverage Diff           @@
##             main    #1320   +/-   ##
=======================================
  Coverage   90.10%   90.10%           
=======================================
  Files          43       43           
  Lines       12576    12576           
=======================================
  Hits        11332    11332           
  Misses       1088     1088           
  Partials      156      156           

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