idempotency-patterns
Idempotency Patterns
Patterns for designing APIs and systems that handle retries safely without duplicate side effects.
When to Use This Skill
- Designing APIs that handle retries safely
- Implementing idempotency keys
- Preventing duplicate operations
- Building reliable payment/order systems
- Handling network failures gracefully
What is Idempotency?
Idempotent operation: Same result regardless of how many times executed
f(x) = f(f(x)) = f(f(f(x))) = ...
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