{"id":21773,"plugin_id":"plugins_6aaf914050908191994b498e42d24d59","kind":"skill","collection_source":null,"comparison_source":null,"observed_at":"2026-09-30T23:17:03.905Z","digest":"ffa179938aa4af742de3021c0cc54fff9bb3b623848d728eaf05cdc9abcd6066","against":null,"payload":{"description":"Design schemas, queries, indexes, migrations, transactions, and data-integrity safeguards.","included_files":[],"name":"database-engineering","skill_md_contents":"---\nname: database-engineering\ndescription: Design schemas, queries, indexes, migrations, transactions, and data-integrity safeguards.\n---\n\n# Database Engineering\n\nModel entities and ownership, keys, constraints, cardinality, indexes, query patterns, migration safety, backups, and rollback. Check performance with realistic access paths and never discard existing data without explicit scope and recovery planning.\n"},"changes":[],"summary":"First saved snapshot. No earlier version is available for comparison.","summary_kind":"deterministic","summary_metadata":{}}