From api-error-handling
Implements standardized API error responses with status codes, logging, user messages, and circuit breaker for Node.js and Python Flask. Use for production APIs, error recovery, and monitoring integration.
npx claudepluginhub secondsky/claude-skills --plugin api-error-handlingThis skill uses the workspace's default tool permissions.
Implement robust error handling with standardized responses and proper logging.
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Implement robust error handling with standardized responses and proper logging.
{
"error": {
"code": "VALIDATION_ERROR",
"message": "Invalid request parameters",
"status": 400,
"requestId": "req_abc123",
"timestamp": "2025-01-15T10:30:00Z",
"details": [
{ "field": "email", "message": "Invalid email format" }
]
}
}
class ApiError extends Error {
constructor(code, message, status = 500, details = null) {
super(message);
this.code = code;
this.status = status;
this.details = details;
}
static badRequest(message, details) {
return new ApiError('BAD_REQUEST', message, 400, details);
}
static notFound(resource) {
return new ApiError('NOT_FOUND', `${resource} not found`, 404);
}
static unauthorized() {
return new ApiError('UNAUTHORIZED', 'Authentication required', 401);
}
}
// Global error handler
app.use((err, req, res, next) => {
const status = err.status || 500;
const response = {
error: {
code: err.code || 'INTERNAL_ERROR',
message: status === 500 ? 'Internal server error' : err.message,
status,
requestId: req.id
}
};
if (err.details) response.error.details = err.details;
if (status >= 500) logger.error(err);
res.status(status).json(response);
});
class CircuitBreaker {
constructor(threshold = 5, timeout = 30000) {
this.failures = 0;
this.threshold = threshold;
this.timeout = timeout;
this.state = 'CLOSED';
}
async call(fn) {
if (this.state === 'OPEN') throw new Error('Circuit open');
try {
const result = await fn();
this.failures = 0;
return result;
} catch (err) {
this.failures++;
if (this.failures >= this.threshold) {
this.state = 'OPEN';
setTimeout(() => this.state = 'HALF_OPEN', this.timeout);
}
throw err;
}
}
}
See references/python-flask.md for: