Rust's borrow checker is a strict but fair mentor. This skill codifies the patterns for working with it effectively.
The Trinity of Ownership
Ownership: Each value has a single owner.
Borrowing:
Unlimited immutable borrows (&T).
EXACTLY ONE mutable borrow (&mut T) at a time.
Lifetimes: Ensuring references are never valid longer than the data they point to.
Smart Pointers
Box<T>: Heap allocation for data with a known size at compile time.
Rc<T> / Arc<T>: Reference counting for shared ownership (Arc is thread-safe).
RefCell<T>: Interior mutability (checked at runtime).
Best Practices
Prefer borrowing over cloning where possible.
Use Struct lifetimes ('a) only when the struct doesn't own its data.
Avoid unsafe unless performing FFI or low-level optimizations.
Converted and distributed by TomeVault — claim your Tome and manage your conversions.
1---2name: jcorpac-ai-skills-library-rs-memory-safety3description: Rust Memory Safety4---56# Rust Memory Safety78Rust's borrow checker is a strict but fair mentor. This skill codifies the patterns for working with it effectively.910## The Trinity of Ownership111. **Ownership**: Each value has a single owner.122. **Borrowing**: 13 - Unlimited immutable borrows (`&T`).14 - EXACTLY ONE mutable borrow (`&mut T`) at a time.153. **Lifetimes**: Ensuring references are never valid longer than the data they point to.1617## Smart Pointers18- `Box<T>`: Heap allocation for data with a known size at compile time.19- `Rc<T>` / `Arc<T>`: Reference counting for shared ownership (Arc is thread-safe).20- `RefCell<T>`: Interior mutability (checked at runtime).2122## Best Practices23- Prefer borrowing over cloning where possible.24- Use `Struct` lifetimes (`'a`) only when the struct doesn't own its data.25- Avoid `unsafe` unless performing FFI or low-level optimizations.2627---28> Converted and distributed by [TomeVault](https://tomevault.io/claim/jcorpac) — claim your Tome and manage your conversions.29<!-- tomevault:4.0:skill_md:2026-04-15 -->
Run npx skillmds@latest add tomevault-io/jcorpac-ai-skills-library-rs-memory-safety in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.
Rust Memory Safety It is listed under Coding & Dev Tools on SkillMD.
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