The existing .github/copilot-instructions.md file was comprehensive but missing several recent additions to the repository structure and build process. This update brings the instructions fully up to date with the current state of the repository.

Key Updates Made

Added Alpha Build Support

The repository now supports alpha builds alongside stable and beta releases, but the instructions were missing this information:

• Updated environment variables to include "alpha" as a valid PKG_RELEASE_TYPE
• Added alpha/32bit/ and alpha/64bit/ directories to repository structure documentation
• Updated dependency management instructions to include alpha package.json files
• Added alpha release type to changelog generation testing

Enhanced Build Instructions

Added a prominent section on local build scripts which provide an easier development experience:

• Added section highlighting the scripts/ directory build tools as the recommended approach for development
• Included proper "NEVER CANCEL" warnings with 30+ minute timeouts for build script commands
• Updated documentation to reflect the current architecture-specific package configuration structure

Improved Validation Scenarios

Enhanced the manual validation scenarios to be more comprehensive:

• Added build scripts validation test (./test/test-build-scripts.sh) to the quick validation scenarios
• Updated dependencies validation commands to include all package.json files across stable/, beta/, and alpha/ directories
• Enhanced dependency listing commands to show all three release types for better debugging

Updated Repository Structure

The directory structure documentation now accurately reflects the current state:

• Added alpha/, scripts/, stable/, and test/ directories
• Updated package.json file organization to show the architecture-specific configs
• Clarified that the root package.json is maintained for legacy compatibility

Validation

All validation commands mentioned in the instructions have been tested and work correctly:

• ✅ Changelog generation works for stable/beta/alpha release types
• ✅ Build scripts test suite passes all validation checks
• ✅ All 7 package.json files validate as proper JSON
• ✅ Docker and jq prerequisites are available
• ✅ Manual validation scenarios complete in under 30 seconds each

The instructions now provide a complete and accurate guide for GitHub Copilot agents working with this homebridge APT packaging repository, covering all three release streams with proper timeout warnings and comprehensive validation scenarios.

Fixes #187.

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