87a3b6ca03
- Refactored chunk edit schema to use explicit `op` enum field (replace, delete, append, prepend, after, before) instead of multiple boolean/string flags. - Renamed chunk edit parameters from `after`/`before` field names to `anchor` for sibling-relative insert operations. - Simplified chunk edit validation logic by consolidating nested conditionals into switch statement on operation type. - Fixed `log_experiment` to correctly identify run-modified files by removing pre-run dirty path filtering. - Simplified chunk edit and read prompt documentation to emphasize read-first workflow with consolidated examples.