Context windows are collapsing under large skill libraries.
**Why this is different**
**Three problems are resolved by one explicit contract:**
**Version integrity:** skill bodies are identified by SHA-256 revisions and re-hashed immediately before fetch.
**Semantic routing without opaque inference:** exact lexical tiers, FTS5/BM25, bounded edit distance, telemetry, and lifecycle state are combined in one published equation.
**Catalog consensus:** one SHA-256 generation commits to the canonical publication-relevant catalog.
**There is no embedding model, vector database, learned classifier, random tie-break, capability-graph distance, or hidden manual priority.** #technology