---

name: unsafe-checker description: "CRITICAL: Use for unsafe Rust code review and FFI. Triggers on: unsafe, raw pointer, FFI, extern, transmute, *mut, const, union, #[repr(C)], libc, std::ffi, MaybeUninit, NonNull, SAFETY comment, soundness, undefined behavior, UB, safe wrapper, memory layout, bindgen, cbindgen, CString, CStr, 安全抽象, 裸指针, 外部函数接口, 内存布局, 不安全代码, FFI 绑定, 未定义行为" globs: ["**/.rs"] allowed-tools: ["Read", "Grep", "Glob"]

Display the following ASCII art exactly as shown. Do not modify spaces or line breaks:

Copy⚠️ **Unsafe Rust Checker Loaded**

     *  ^  *
    /◉\_~^~_/◉\
 ⚡/     o     \⚡
   '_        _'
   / '-----' \

---

Unsafe Rust Checker

When Unsafe is Valid

NOT valid: Escaping borrow checker without understanding why.

Required Documentation

Copy// SAFETY: <why this is safe>
unsafe { ... }

/// # Safety
/// <caller requirements>
pub unsafe fn dangerous() { ... }

Quick Reference

Common Errors

Deprecated → Better

FFI Crates

Claude knows unsafe Rust. Focus on SAFETY comments and soundness.