Fixed automation-breaking issue where --list mode always returned exit code 0,
even when list_available_transcripts() failed due to invalid video ID or network errors.
Changes:
- extract-transcript.py: Capture return value and exit with proper status code
- Before: list_available_transcripts(video_id); sys.exit(0)
- After: success = list_available_transcripts(video_id); sys.exit(0 if success else 1)
- SKILL.md: Bumped version to 1.2.1
- CHANGELOG.md: Created changelog with v1.2.1 release notes
Impact: Automation scripts can now detect failures correctly via exit codes.
Identified by Codex automated review in antigravity-awesome-skills PR #62.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
621dbe008e