Enhanced error messages when GitHub API returns "Resource not accessible by integration"
errors during git reference updates. The improved error output includes:
- Repository and branch context
- Token metadata (length and prefix)
- Parent and target SHA details
- GitHub Actions environment info
- Full API response details
- Debugging hints for common causes
This helps diagnose whether failures are due to protected branches, permission
issues, race conditions, or transient GitHub API issues.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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