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name: full-stack-development description: | Guide for building complete solutions across the full technology stack. Use when asked to implement features spanning frontend, backend, database, and infrastructure layers.

Full-Stack Development

When to use this skill

Use this skill when:

• Building features that span multiple layers
• Implementing end-to-end functionality
• Working across frontend, backend, and infrastructure
• Debugging issues that cross layer boundaries

Technology Stack

Primary Languages

• JavaScript/TypeScript: Frontend and Node.js backend
• Python: Backend APIs and data processing

Infrastructure

• Terraform: Cloud infrastructure as code
• CloudFormation: AWS-specific infrastructure
• Docker: Containerization

Layer Responsibilities

Frontend

• User interface and experience
• Client-side validation
• API integration
• State management

Backend API

• Business logic
• Data validation
• Authentication/authorization
• External service integration

Database

• Data persistence
• Query optimization
• Schema migrations
• Data integrity

Infrastructure

• Deployment pipelines
• Environment configuration
• Scaling and reliability
• Monitoring and logging

Development Process

1. Start with the Interface

• Define the API contract first
• Frontend and backend can work in parallel
• Clear interface = fewer integration issues

2. Build Vertically

• Complete one feature end-to-end before starting another
• Validates assumptions early
• Delivers demonstrable progress

3. Test Across Layers

• Unit tests per layer
• Integration tests across layers
• End-to-end tests for critical paths

Full-Stack Checklist

• API contract is defined
• Frontend connects to backend correctly
• Database schema supports the feature
• Error handling spans all layers
• Feature works end-to-end
• Deployment is automated