Harness-engineering db-hash-index

name: db-hash-index version: '1.0.0' description: Hash indexes for equality-only lookups and when to prefer them over B-tree stability: static cognitive_mode: advisory-guide type: knowledge tier: 3 triggers:

• manual platforms:
• claude-code
• gemini-cli
• cursor
• codex tools: [] paths: [] related_skills:
• db-btree-index
• db-composite-index
• db-explain-reading
• db-scan-types stack_signals:
• postgresql
• mysql
• database keywords:
• hash-index
• equality-lookup
• hash-function
• index-type metadata: author: community upstream: postgresql.org/docs/current/indexes-types.html state: persistent: false files: [] depends_on: []