backend-development
Backend API design, database architecture, microservices patterns, and test-driven development. Use for designing APIs, database schemas, or backend system architecture.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/moizibnyousaf/ai-agent-skills --skill backend-development- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads backend-development automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
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
{
"data": { ... },
"meta": {
"page": 1,
"per_page": 20,
"total": 100
}
}
Error Format
{
"error": {
"code": "VALIDATION_ERROR",
"message": "Invalid input",
"details": [
{ "field": "email", "message": "Invalid format" }
]
}
}
Database Patterns
Schema Design
-- 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
-- Pagination with cursor
SELECT * FROM posts
WHERE created_at < $cursor
ORDER BY created_at DESC
LIMIT 20;
-- Efficient counting
SELECT reltuples::bigint AS estimate
FROM pg_class WHERE relname = 'users';
Authentication
JWT Pattern
interface TokenPayload {
sub: string; // User ID
iat: number; // Issued at
exp: number; // Expiration
scope: string[]; // Permissions
}
function verifyToken(token: string): TokenPayload {
return jwt.verify(token, SECRET) as TokenPayload;
}
Middleware
async function authenticate(req: Request, res: Response, next: Next) {
const token = req.headers.authorization?.replace('Bearer ', '');
if (!token) {
return res.status(401).json({ error: 'Unauthorized' });
}
try {
req.user = verifyToken(token);
next();
} catch {
res.status(401).json({ error: 'Invalid token' });
}
}
Caching Strategy
// Cache-aside pattern
async function getUser(id: string): Promise<User> {
const cached = await redis.get(`user:${id}`);
if (cached) return JSON.parse(cached);
const user = await db.users.findById(id);
await redis.setex(`user:${id}`, 3600, JSON.stringify(user));
return user;
}
// Cache invalidation
async function updateUser(id: string, data: Partial<User>) {
await db.users.update(id, data);
await redis.del(`user:${id}`);
}
Rate Limiting
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:
/healthand/readyendpoints
FAQ
What does the backend-development skill do?
Backend API design, database architecture, microservices patterns, and test-driven development. Use for designing APIs, database schemas, or backend system architecture.
How do I install backend-development?
Run npx skills add https://github.com/moizibnyousaf/ai-agent-skills --skill backend-development in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/backend-development/ (personal) or .claude/skills/backend-development/ (project).
Which AI agents can use backend-development?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is backend-development safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains backend-development?
It is published by moizibnyousaf in moizibnyousaf/ai-agent-skills. It has 869 recorded installs.
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