# Architecture Patterns

System and API design guidance covering component boundaries, data flow, integration...

- Repository: https://github.com/a5c-ai/babysitter (1887 stars)
- Category: Design
- License: MIT
- Last updated: 2026-11-01
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add a5c-ai/babysitter --skill architecture-patterns -g -a claude-code -y`
Codex: `npx skills add a5c-ai/babysitter --skill architecture-patterns -g -a codex -y`
Cursor: `npx skills add a5c-ai/babysitter --skill architecture-patterns -g -a cursor -y`
Gemini CLI: `npx skills add a5c-ai/babysitter --skill architecture-patterns -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add a5c-ai/babysitter`

## Description

System and API design guidance covering component boundaries, data flow, integration patterns, and scalability considerations.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

- Single responsibility boundaries
- Interface contracts and type safety
- Dependency injection patterns
- Module cohesion and coupling analysis

### Data Flow
- Request/response patterns
- Event-driven architecture
- State management strategies
- Data transformation pipelines

### Integration Patterns
- API design (REST, GraphQL, RPC)
- Message queuing and async processing
- Service boundaries and communication
- Error propagation across boundaries

### Scalability
- Horizontal vs vertical scaling considerations
- Caching strategies
- Database design and query optimization
- Load balancing and distribution

## Decision Checkpoints

Architectural decisions require user approval when:
- Introducing new service boundaries
- Changing data flow patterns
- Adding new external dependencies
- Modifying public API contracts

## When to Use

- During PLAN workflow architecture phases
- During BUILD when architectural choices arise
- When reviewing system design in REVIEW workflow

## Agents Used

- `planner` (architecture planning)
- `component-builder` (architecture implementation)
- `code-reviewer` (architecture review)