- Run ruff format on all 26 unformatted files
- Fix mypy strict errors: add explicit typing for json.loads returns,
add pywin32/websockets to mypy ignore_missing_imports
- Remove yaml dependency from test_skill_triggering.py (use regex parser)
- Fix skill triggering test to handle both single-line and multi-line
description formats in YAML frontmatter
19 files from earlier v3 sessions were created on disk but never
staged/committed: 11 source modules (backends, preview, templates,
utils) and 8 test files (488 tests depend on these).
Without these files the package would be broken on install.
Found during pre-publish review.
