Backend DB Design

When to Activate

• User wants to design database schema
• User says "design database", "create schema", "plan tables"
• Starting a new feature with data storage
• Need to add new tables/collections
• User asks "what database should I use?"

Prerequisites

See _shared/context-loading.md for standard prerequisites (project root check, manifest detection, shared file presence, memory fallback, and staleness rules).

DB-design-specific prerequisites: