Idempotent API operations with idempotency keys, Redis caching, DB constraints. Use for payment systems, webhook retries, safe retries, or encountering duplicate processing, race conditions, key expiry errors.
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Fires itselfClaude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/idempotency-handling
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Idempotent API operations with idempotency keys, Redis caching, DB constraints. Use for payment systems, webhook retries, safe retries, or encountering duplicate processing, race conditions, key expiry errors.
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Stars194
Forks29
LanguageTypeScript
LicenseMIT
📦 Ships with claude-skills
</> SKILL.md
idempotency-handling.SKILL.md
---name: idempotency-handling
description: Idempotent API operations with idempotency keys, Redis caching, DB constraints. Use for payment systems, webhook retries, safe retries, or encountering duplicate processing, race conditions, key expiry errors.
license: MIT
---# Idempotency Handling
Ensure operations produce identical results regardless of execution count.
## Idempotency Key Pattern
```javascript
const redis = require('redis');
const client = redis.createClient();
async function idempotencyMiddleware(req, res, next) {
const key = req.headers['idempotency-key'];
if (!key) return next();
const cached = await client.get(`idempotency:${key}`);
if (cached) {
const { status, body } = JSON.parse(cached);
return res.status(status).json(body);
}
// Store original send
const originalSend = res.json.bind(res);
res.json = async (body) => {
await client.setEx(
`idempotency:${key}`,
86400, // 24 hours
JSON.stringify({ status: res.statusCode, body })
);
return originalSend(body);
