v0.2.1

Added

• Authentication diagnostics - New notebooklm auth check command for troubleshooting auth issues
  • Shows storage file location and validity
  • Lists cookies present and their domains
  • Detects NOTEBOOKLM_AUTH_JSON and NOTEBOOKLM_HOME usage
  • --test flag performs network validation
  • --json flag for machine-readable output (CI/CD friendly)
• Structured logging - Comprehensive DEBUG logging across library
  • NOTEBOOKLM_LOG_LEVEL environment variable (DEBUG, INFO, WARNING, ERROR)
  • RPC call timing and method tracking
  • Legacy NOTEBOOKLM_DEBUG_RPC=1 still works
• RPC health monitoring - Automated nightly check for Google API changes
  • Detects RPC method ID mismatches before they cause failures
  • Auto-creates GitHub issues with rpc-breakage label on detection

Fixed

• Cookie domain priority - Prioritize .google.com cookies over regional domains (e.g., .google.co.uk) for more reliable authentication
• YouTube URL parsing - Improved handling of edge cases in YouTube video URLs

Documentation

• Added auth check to CLI reference and troubleshooting guide
• Consolidated CI/CD troubleshooting in development guide
• Added installation instructions to SKILL.md for Claude Code
• Clarified version numbering policy (PATCH vs MINOR)

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Full Changelog: v0.2.0...v0.2.1