Interactive tool

Pattern Composer

Choose your stack and patterns. Get a customized set of .claude/ files, AI skills, and configs, ready to drop into your project.

Not sure what these patterns mean? Read the Patterns Explained guide. Or grab one-size-fits-all templates from the Starter Kit.

FastAPI + Python

python fastapi pydantic

Async-first Python backend with auto-generated OpenAPI docs, Pydantic validation, and SQLAlchemy ORM.

Next.js + TypeScript

typescript nextjs prisma

Full-stack TypeScript with Next.js App Router, Prisma ORM, Zod validation, and tRPC or REST API routes.

Domain-Driven Design

ddd domains boundaries

Organize code by business domain, not technical layer. Each feature owns its models, logic, and tests.

Event-Driven Architecture

events pub-sub loose-coupling

Domains communicate through events instead of direct calls. Reduces coupling, enables async workflows.

Monolith-First

monolith pragmatic simple

Start as a well-structured monolith. Extract services only when a domain needs independent scaling.

PostgreSQL + Row-Level Security

postgresql rls multi-tenant

Multi-tenant data isolation enforced at the database level. Tenants cannot access each other's data, even with application bugs.

PostgreSQL (Standard)

postgresql standard single-tenant

PostgreSQL with standard conventions. UUID primary keys, timestamps, naming patterns, and migration rules.

Pre-commit Hooks

pre-commit linting formatting

Catch formatting issues, lint errors, and leaked secrets before code leaves your machine. Under 5 seconds.

CI/CD (GitHub Actions)

ci github-actions automation

Automated quality gates on every pull request: lint, type check, test with coverage, and dependency audit.

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