api-patterns

API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.

23 stars

Best use case

api-patterns is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.

Teams using api-patterns should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

  • You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

  • You only need a quick one-off answer and do not need a reusable workflow.
  • You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/api-patterns/SKILL.md --create-dirs "https://raw.githubusercontent.com/christophacham/agent-skills-library/main/skills/backend-dev/api-patterns/SKILL.md"

Manual Installation

  1. Download SKILL.md from GitHub
  2. Place it in .claude/skills/api-patterns/SKILL.md inside your project
  3. Restart your AI agent — it will auto-discover the skill

How api-patterns Compares

Feature / Agentapi-patternsStandard Approach
Platform SupportNot specifiedLimited / Varies
Context Awareness High Baseline
Installation ComplexityUnknownN/A

Frequently Asked Questions

What does this skill do?

API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

SKILL.md Source

# API Patterns

> API design principles and decision-making for 2025.
> **Learn to THINK, not copy fixed patterns.**

## 🎯 Selective Reading Rule

**Read ONLY files relevant to the request!** Check the content map, find what you need.

---

## 📑 Content Map

| File | Description | When to Read |
|------|-------------|--------------|
| `api-style.md` | REST vs GraphQL vs tRPC decision tree | Choosing API type |
| `rest.md` | Resource naming, HTTP methods, status codes | Designing REST API |
| `response.md` | Envelope pattern, error format, pagination | Response structure |
| `graphql.md` | Schema design, when to use, security | Considering GraphQL |
| `trpc.md` | TypeScript monorepo, type safety | TS fullstack projects |
| `versioning.md` | URI/Header/Query versioning | API evolution planning |
| `auth.md` | JWT, OAuth, Passkey, API Keys | Auth pattern selection |
| `rate-limiting.md` | Token bucket, sliding window | API protection |
| `documentation.md` | OpenAPI/Swagger best practices | Documentation |
| `security-testing.md` | OWASP API Top 10, auth/authz testing | Security audits |

---

## 🔗 Related Skills

| Need | Skill |
|------|-------|
| API implementation | `@[skills/backend-development]` |
| Data structure | `@[skills/database-design]` |
| Security details | `@[skills/security-hardening]` |

---

## ✅ Decision Checklist

Before designing an API:

- [ ] **Asked user about API consumers?**
- [ ] **Chosen API style for THIS context?** (REST/GraphQL/tRPC)
- [ ] **Defined consistent response format?**
- [ ] **Planned versioning strategy?**
- [ ] **Considered authentication needs?**
- [ ] **Planned rate limiting?**
- [ ] **Documentation approach defined?**

---

## ❌ Anti-Patterns

**DON'T:**
- Default to REST for everything
- Use verbs in REST endpoints (/getUsers)
- Return inconsistent response formats
- Expose internal errors to clients
- Skip rate limiting

**DO:**
- Choose API style based on context
- Ask about client requirements
- Document thoroughly
- Use appropriate status codes

---

## Script

| Script | Purpose | Command |
|--------|---------|---------|
| `scripts/api_validator.py` | API endpoint validation | `python scripts/api_validator.py <project_path>` |


## When to Use
This skill is applicable to execute the workflow or actions described in the overview.

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