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m14-mental-model — Claude Code skill: Rust mental models

A skill that explains ownership, borrowing and lifetimes in Rust through analogies and compiler error breakdowns. Useful when the borrow checker blocks your build.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add actionbook/rust-skills --skill m14-mental-model -a claude-code
Open on GitHub

What m14-mental-model does

The skill lays out mental models for core Rust concepts. Ownership is a single house key, a move is handing that key over, &T is lending a book to read, &mut T is being the only one allowed to edit the document. Smart pointers get their own analogies: Box<T> as a remote control to the TV, Rc<T> as several remotes where the last one turns it off, Arc<T> as those remotes working from any room.

A second table covers switching languages. From Java and C# the shift is that values are owned rather than referenced by default. From Python and Go it is the absence of a garbage collector and deterministic destruction. From JavaScript, Option replaces null.

There is a misconception table keyed to compiler errors: E0382, E0502, E0499, E0106, E0507. Each row pairs the wrong model with the correct one. The skill is not user-invocable, so you just describe what confuses you and let the agent pick it up.

What it helps with

  • understand why a variable stops working after a move
  • tell &T and &mut T apart by what access they grant
  • explain lifetimes to a teammate without dry theory
  • switch to Rust from Java or Python without carrying old habits
  • decode a borrow checker error and find the rule you broke

Example prompts for the agent

  • Explain with analogies why Rust rejects two mutable borrows at once
  • I'm coming from Python — what do I need to rethink about ownership?
  • Why does the compiler throw E0382 and how should I rewrite this?

How to install m14-mental-model

1Skills CLI (Vercel)

npx skills add actionbook/rust-skills --skill m14-mental-model -a claude-code

2Manually: put the files in place

~/.claude/skills/m14-mental-model/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/m14-mental-model/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about m14-mental-model

How do I install m14-mental-model in Claude?

Run npx skills add actionbook/rust-skills --skill m14-mental-model -a claude-code. The skill file lands at ~/.claude/skills/m14-mental-model/SKILL.md.

What does m14-mental-model do?

It collects mental models for Rust concepts: ownership, moves, borrowing, lifetimes and smart pointers, plus tables of misconceptions and language transitions.

Is the skill invoked manually?

No, it is marked user-invocable: false. It activates when a request is about learning Rust and understanding its concepts.

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