Design repeated execution to converge on the same correct end state rather than multiplying side effects. Use when for commands, lifecycle steps, retries, loops, or crash recovery.
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---
name: principle-make-operations-idempotent
description: Design repeated execution to converge on the same correct end state rather than multiplying side effects. Use when for commands, lifecycle steps, retries, loops, or crash recovery.
---
# Make Operations Idempotent
## Trigger
For commands, lifecycle steps, retries, loops, or crash recovery.
## Rule
Design repeated execution to converge on the same correct end state rather than multiplying side effects.
## Application
1. Name the concrete decision this principle changes.
2. Apply the rule to that decision, not as a decorative citation.
3. Prefer evidence from the current repository/runtime over generic preference.
4. If the principle conflicts with an explicit user constraint, keep the constraint and state the tradeoff.
