Does this skill help with multi-threaded synchronization?

Yes, it provides a 'Trace Down' guide for choosing between Atomic types for simple counters, Mutex for exclusive access, and RwLock for read-heavy shared state in multi-threaded contexts.

Which Rust error codes does this skill address?

This skill specifically targets borrow checker errors including E0596 (borrowing immutable as mutable), E0499 (multiple mutable borrows), and E0502 (mutable borrow while immutable exists).

When should I use RefCell according to this skill?

The skill recommends RefCell for single-threaded scenarios where you need to mutate data through an immutable reference, but it cautions against using it when a design change could achieve compile-time safety instead.

How does this skill handle RefCell panics?

It helps identify 'RefCell everywhere' anti-patterns and suggests restructuring code flows or using try_borrow methods to prevent runtime crashes.

Rust Mutability Master

Name: Rust Mutability Master
Author: lywa1998

bylywa1998

0•

Developer Tools

Resolves complex Rust mutability conflicts and guides the implementation of interior mutability patterns for safe state management.

The m03-mutability skill is a specialized diagnostic and architectural tool designed to help developers navigate the Rust borrow checker. It provides immediate solutions for common errors like E0499 and E0502 while offering high-level design advice on whether to use exclusive borrows, interior mutability primitives like RefCell and Cell, or thread-safe alternatives such as Mutex and RwLock. By prioritizing architectural integrity over 'quick fixes,' it ensures that state management remains memory-safe and performant across both single-threaded and concurrent environments.

Key Features

01Identification of mutability anti-patterns that cause runtime panics or performance bottlenecks

02Decision logic for selecting appropriate interior mutability primitives (Cell vs RefCell)

03Automated diagnosis and resolution of borrow checker errors (E0596, E0499, E0502)

04Thread-safety guidance for concurrent state management using Mutex, RwLock, and Atomics

05Architectural patterns to replace unnecessary mutation with transformations or builders

060 GitHub stars

Use Cases

01Refactoring complex data structures to resolve persistent 'cannot borrow as mutable' conflicts

02Migrating from runtime borrow checking to compile-time safety through data restructuring

03Designing thread-safe shared state for high-concurrency systems using Arc and Mutex

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add lywa1998/self-host-claude-marketplace m03-mutability

For use in Claude.ai and ChatGPT

Download Skill