# Backend Development

> Backend API design, database architecture, microservices patterns, and test-driven development. Use for designing APIs, database schemas, or backend system architecture.

- **Type:** Skill
- **Install:** `agentstack add skill-moizibnyousaf-ai-agent-skills-backend-development`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [MoizIbnYousaf](https://agentstack.voostack.com/s/moizibnyousaf)
- **Installs:** 0
- **Category:** [Databases](https://agentstack.voostack.com/c/databases)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [MoizIbnYousaf](https://github.com/MoizIbnYousaf)
- **Source:** https://github.com/MoizIbnYousaf/Ai-Agent-Skills/tree/main/skills/backend-development
- **Website:** https://github.com/MoizIbnYousaf/Ai-Agent-Skills#readme

## Install

```sh
agentstack add skill-moizibnyousaf-ai-agent-skills-backend-development
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Backend Development

## API Design

### RESTful Conventions
```
GET    /users          # List users
POST   /users          # Create user
GET    /users/:id      # Get user
PUT    /users/:id      # Update user (full)
PATCH  /users/:id      # Update user (partial)
DELETE /users/:id      # Delete user

GET    /users/:id/posts  # List user's posts
POST   /users/:id/posts  # Create post for user
```

### Response Format
```json
{
  "data": { ... },
  "meta": {
    "page": 1,
    "per_page": 20,
    "total": 100
  }
}
```

### Error Format
```json
{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid input",
    "details": [
      { "field": "email", "message": "Invalid format" }
    ]
  }
}
```

## Database Patterns

### Schema Design
```sql
-- Use UUIDs for public IDs
CREATE TABLE users (
  id SERIAL PRIMARY KEY,
  public_id UUID DEFAULT gen_random_uuid() UNIQUE,
  email VARCHAR(255) UNIQUE NOT NULL,
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
);

-- Soft deletes
ALTER TABLE users ADD COLUMN deleted_at TIMESTAMPTZ;

-- Indexes
CREATE INDEX idx_users_email ON users(email);
CREATE INDEX idx_users_created ON users(created_at DESC);
```

### Query Patterns
```sql
-- Pagination with cursor
SELECT * FROM posts
WHERE created_at  {
  const cached = await redis.get(`user:${id}`);
  if (cached) return JSON.parse(cached);

  const user = await db.users.findById(id);
  await redis.setex(`user:${id}`, 3600, JSON.stringify(user));
  return user;
}

// Cache invalidation
async function updateUser(id: string, data: Partial) {
  await db.users.update(id, data);
  await redis.del(`user:${id}`);
}
```

## Rate Limiting

```typescript
const limiter = rateLimit({
  windowMs: 60 * 1000,  // 1 minute
  max: 100,             // 100 requests per window
  keyGenerator: (req) => req.ip,
  handler: (req, res) => {
    res.status(429).json({ error: 'Too many requests' });
  }
});
```

## Observability

- **Logging**: Structured JSON logs with request IDs
- **Metrics**: Request latency, error rates, queue depths
- **Tracing**: Distributed tracing with correlation IDs
- **Health checks**: `/health` and `/ready` endpoints

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [MoizIbnYousaf](https://github.com/MoizIbnYousaf)
- **Source:** [MoizIbnYousaf/Ai-Agent-Skills](https://github.com/MoizIbnYousaf/Ai-Agent-Skills)
- **License:** MIT
- **Homepage:** https://github.com/MoizIbnYousaf/Ai-Agent-Skills#readme

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-moizibnyousaf-ai-agent-skills-backend-development
- Seller: https://agentstack.voostack.com/s/moizibnyousaf
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.