- Add .sh, .bash, .json to CODE_EXTENSIONS in detect.py so files reach extractor
- Fix test_detect_incremental manifest path collision with new .json extension
- Update test_watch to reflect .json/.sh are now watched extensions
- B-1: only emit source imports for paths that exist on disk
- J-1: replace stat()+read() with bounded read to eliminate TOCTOU
- J-3: move pair_count cap inside loop so it is honoured exactly
- J-4: namespace $ref/extends refs with "ref_" prefix to prevent ID collision
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>