mojo-memory-check

Detect Mojo memory-safety violations involving ownership, borrowing, and lifetimes.

18|5|Updated Nov 3, 2025
One-click install
npx skills add https://github.com/mvillmow/ml-odyssey --skill mojo-memory-check
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mojo-memory-check
Source: https://github.com/mvillmow/ml-odyssey/tree/main/.claude/skills/mojo-memory-check
Command: npx skills add https://github.com/mvillmow/ml-odyssey --skill mojo-memory-check

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? This Skill helps developers ensure Mojo code adheres to memory safety rules, including ownership, borrowing, and lifetime management, preventing common memory-related bugs like use-after-move or dangling references. It automates memory safety checks, reducing manual debugging.

Core Features & Use Cases:

  • Ownership Guidance: Explains and validates the use of owned, borrowed, and inout parameters for safe memory handling.
  • Common Issue Detection: Highlights patterns that lead to use-after-move, lifetime issues, and mutable aliasing, guiding developers to robust solutions.
  • Use Case: During a code review of a performance-critical Mojo module, use this skill to verify memory safety. It will help you identify potential use-after-move errors or dangling references, ensuring robust and bug-free code.

Quick Start: Use the mojo-memory-check skill to review the Mojo code in 'src/my_module.mojo' for memory safety issues.

Frequently Asked Questions about mojo-memory-check

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I detect memory safety violations in Mojo code?

Memory safety violations in Mojo occur when ownership, borrowing, or lifetime rules are broken—causing use-after-move or dangling references. This Skill analyzes ownership transfers using `^`, borrow lifetimes, `mut`/`self` semantics, and non-copyable types to identify and report violations with suggested fixes.

What are ownership, borrowing, and lifetimes in Mojo?

Ownership determines who controls a value's lifetime; borrowing allows temporary access without ownership transfer; lifetimes define how long references remain valid. Mojo enforces these via `owned`, `borrowed`, and `inout` parameters to prevent memory errors and unsafe aliasing.

When should I run memory safety checks during development?

Run memory safety checks during code reviews, debugging sessions, pre-merge checks, and performance evaluations—especially in performance-critical modules. Early detection prevents use-after-move errors and dangling references from reaching production.

Can I automate Mojo memory safety validation in my workflow?

Yes. This Skill automates memory safety checks by detecting ownership and borrowing violations, reducing manual debugging effort. It validates fixes through testing and integrates into code review and pre-merge pipelines.

What types of memory errors does this catch in Mojo?

This Skill catches use-after-move errors, dangling references, mutable aliasing violations, and lifetime mismatches. It detects patterns that violate Mojo's ownership model and guides developers toward robust solutions.

Do I need prior knowledge of Mojo's ownership system to use this?

Basic familiarity with Mojo's `owned`, `borrowed`, and `inout` semantics helps, but this Skill provides ownership guidance and explains violations with suggested fixes, making it accessible for developers new to Mojo's memory model.