Database Schema Designer
Design optimized database schemas for SQL and NoSQL databases including tables, relationships, indexes, and constraints. Creates ERD diagrams, migration scripts, and data modeling best practices. Use when users need database design, schema optimization, or data architecture planning.
What it does
# Database Schema Designer Design optimized, scalable database schemas with proper relationships and indexes. ## Contents - `references/schema-templates.md` — SQL/NoSQL schema templates, ASCII ERD, and migration script templates. - `references/output-format.md` — labeled section structure for the final deliverable. - `references/best-practices.md` — naming, data types, indexes, relationships, SQL/NoSQL design rules, and the output quality checklist. ## Workflow 1. Gather requirements. Determine the database engine (PostgreSQL, MySQL, MongoDB, etc.), application domain, main entities, most common queries, expected data volume and growth, performance requirements, and any compliance constraints. 2. Design the schema. Apply the engine-appropriate rules in `references/best-practices.md` (SQL Database Design or NoSQL Database Design). 3. Generate the complete schema. Produce CREATE TABLE statements or collection documents using the templates in `references/schema-templates.md`. 4. Create the entity relationship diagram in text format following the ERD template in `references/schema-templates.md`. 5. Provide migration scripts with both up and down (rollback) paths, per the migration template in `references/schema-templates.md`. 6. Format the complete output using the labeled sections in `references/output-format.md`. 7. Verify the result against the output quality checklist in `references/best-practices.md`. ## Example Triggers - "Design a database schema for an e-commerce platform" - "Create SQL tables for a blog system" - "Help me design a MongoDB schema for a social network" - "Optimize this database schema for performance" - "Generate migration scripts for my schema" Generate production-ready, optimized database schemas that scale.
More engineering skills
API Documentation Writer
Generate comprehensive API documentation including endpoint descriptions, request/response examples, authentication guides, error codes, and SDKs. Creates OpenAPI/Swagger specs, REST API docs, and developer-friendly reference materials. Use when users need to document APIs, create technical references, or write developer documentation.
API Endpoint Scaffolder
Generate REST API endpoints with proper structure, validation, error handling, and types. Use when creating new API routes, endpoints, or backend services.
API Load Tester
Load tests API endpoints with progressive concurrency. Measures response times, error rates, throughput, and identifies breaking points. Generates a detailed report with latency percentiles, throughput curves, bottleneck analysis, and optimization recommendations.
Before You Build
Use before starting a product, feature, MVP, agent, automation, or integration build to identify the main pre-build risk and choose the smallest validation step. Trigger when the user asks whether to build, scope, validate, prioritize, or sanity-check an idea before implementation.