Implement Phase 4 of v1.4.0 Media release - Enhanced Feed Media support.
RSS Feed Enhancements (starpunk/feeds/rss.py):
- Wrap size variants in <media:group> elements
- Add <media:content> for large/medium/small variants with attributes:
url, type, medium, isDefault, width, height, fileSize
- Add <media:thumbnail> for thumb variant with dimensions
- Add <media:title type="plain"> for image captions
- Implement isDefault logic: largest available variant (large→medium→small fallback)
- Maintain backwards compatibility for media without variants (legacy fallback)
JSON Feed Enhancements (starpunk/feeds/json_feed.py):
- Add _starpunk.about URL (configurable via STARPUNK_ABOUT_URL config)
- Add _starpunk.media_variants array with variant data when variants exist
- Each variant entry includes: url, width, height, size_in_bytes, mime_type
ATOM Feed Enhancements (starpunk/feeds/atom.py):
- Add title attribute to enclosure links for captions
- Keep simple (no variants in ATOM per design decision)
Test Updates (tests/test_feeds_rss.py):
- Update streaming media test to search descendants for media:content
- Now inside media:group for images with variants (v1.4.0 behavior)
Per design document: /docs/design/v1.4.0/media-implementation-design.md
Following ADR-059: Full Feed Media Standardization
Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Phil Skentelbery
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