This PR addresses repository hygiene issues discovered during a comprehensive code review of the GABP protocol implementation.

Changes Made

Added .gitignore File

The repository was missing a .gitignore file, which led to accidental commits of node_modules and other build artifacts. Added comprehensive .gitignore covering:

• Node.js dependencies (node_modules/, package-lock.json)
• Build artifacts (dist/, build/)
• IDE files (.vscode/, .idea/)
• OS files (.DS_Store, Thumbs.db)
• Temporary files

Repository Cleanup

Removed accidentally committed dependencies from the JavaScript package that were included in a previous commit, including:

• packages/js/gabp-schemas/node_modules/ (1800+ files)
• packages/js/gabp-schemas/package-lock.json

Review Findings

During the comprehensive review, several issues were identified that require follow-up work:

Critical Issues (JavaScript Package)

• Missing test.js and build.js files referenced in package.json scripts
• 5 missing schema files in the JS package compared to main schema directory
• AJV validation failures due to JSON Schema draft compatibility issues
• npm security vulnerabilities (2 high severity)

Positive Findings

• All 41 JSON files have valid syntax
• 100% GABP message format compliance (15/15 test cases pass)
• Excellent documentation and specification quality
• Robust CI/CD validation workflows
• Professional contributing guidelines and security model

Impact

This PR ensures the repository follows proper Git hygiene practices and prevents future accidental commits of build artifacts. The .gitignore file will protect against similar issues going forward.

The review findings document areas for improvement, particularly in the JavaScript package implementation, but confirm that the core GABP protocol specification is technically excellent and follows industry best practices.

Next Steps

Follow-up PRs should address:

1. JavaScript package missing files and schema synchronization
2. AJV validation compatibility fixes
3. npm security vulnerability resolution
4. Minor markdown linting issues

This establishes a clean foundation for those improvements.

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