Latch Heal — Development skill for Claude Code

description: Nightly heal — integrity sweep + three-pass contradiction resolver

Run the nightly heal against the per-project knowledge base under ``. Two phases:

1. Integrity — clean up orphan edges and sync the vec_nodes virtual table with the main nodes table (delete orphans, backfill missing).
2. Contradiction sweep — for every non-stale node with an embedding, find near-duplicates at cosine similarity ≥ 0.70 (the range the on-insert heal deferred). For