- Fixed typo "filesred" → "files" in validate-lexicon/main.go - Added validate-lexicon binary to .gitignore and removed from git - Updated facet schema to include required $type fields for AT Protocol compatibility - Removed duplicate mentions field from microblog.json (use facets instead) - Added comprehensive facet tests covering UTF-8 byte counting and all feature types - Fixed lexicon validation test to reference correct schema names - Added detailed facet documentation with UTF-8 byte counting examples The facet implementation now follows AT Protocol standards with proper $type fields for each feature (mention, link, bold, italic, strikethrough, spoiler). All byte indices use UTF-8 encoding for cross-platform consistency. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>