# prefer-immutability

> Prefer const over let and readonly properties where possible Use when enforcing code quality standards. Quality category skill.

- Author: OmniaffixDave
- Repository: OmniaffixDave/SessionGuardian
- Version: 20260205125233
- Stars: 0
- Forks: 1
- Last Updated: 2026-02-08
- Source: https://github.com/OmniaffixDave/SessionGuardian
- Web: https://mule.run/skillshub/@@OmniaffixDave/SessionGuardian~prefer-immutability:20260205125233

---

---
name: prefer-immutability
description: Prefer const over let and readonly properties where possible Use when enforcing code quality standards. Quality category skill.
metadata:
  category: Quality
  priority: medium
  is-built-in: true
  session-guardian-id: builtin_prefer_immutability
---

# Prefer Immutability

Prefer const over let and readonly properties where possible. Use immutable update patterns: spread operators for objects/arrays, map/filter/reduce instead of mutating loops. When working with shared state, consider immutable data structures. Mutations should be intentional and localized, not scattered throughout the codebase.