Enforce immutable data patterns across JavaScript, TypeScript, Python, and Go. Use when the user writes code that mutates objects, arrays, or state. Apply whenever modifying data structures, updating state, or reviewing code for mutation bugs. Always prefer immutable patterns over in-place mutation.
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Immutability Patterns
Create new objects instead of mutating existing ones. Immutability prevents shared-state bugs, makes code easier to reason about, and enables reliable change detection.
When to Use
Writing any function that transforms data
Updating React/Vue/Svelte state
Working with Redux or other state management
Reviewing code that modifies objects or arrays in place
Any time .push(), .splice(), delete, or direct property assignment appears on shared data
Core
[Description truncada. Veja o README completo no GitHub.]
