The post-520 migration changed validate_story_dirs to read from
pipeline_state::read_all_typed() (the process-global CRDT singleton),
ignoring its root: &Path argument. This broke test isolation — tests
creating a tempdir saw dozens of results from ambient CRDT state,
causing non-deterministic failures that blocked every mergemaster gate.
Remove the CRDT singleton block and rely on the filesystem shadow scan
that already uses the root argument correctly. 1845/1845 tests pass.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
TimmyandClaude Opus 4.6
9633ab35a6