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m15-anti-pattern — Claude Code skill for Rust review

Reviews Rust code for anti-patterns and points to idiomatic replacements. Use it during code review or when ownership and error handling become hard to reason about.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add actionbook/rust-skills --skill m15-anti-pattern -a claude-code
Open on GitHub

What m15-anti-pattern does

m15-anti-pattern flags common Rust issues such as unnecessary .clone() calls, .unwrap() in production code, unnecessary Rc, convenience-driven unsafe, and String where &str fits. It also checks for index loops, ignored #[must_use] results, long functions, and overly public fields.

The skill connects a visible smell to its likely cause. Repeated cloning can signal an unclear ownership model, while lifetime struggles can call for a different data structure. It points to related skills including m01-ownership, m06-error-handling, and m09-domain. You cannot run it as a slash command because user-invocable is disabled.

What it helps with

  • find unnecessary .clone() calls in Rust code
  • replace .unwrap() with error handling
  • trace borrow checker friction to a design issue
  • turn index loops into iterator-based code
  • review unsafe for a safe alternative

Example prompts for the agent

  • Review this Rust module for anti-patterns and explain each issue.
  • Why does this code use so many .clone() calls? Check the ownership model.
  • Is this .unwrap() appropriate for production code?

How to install m15-anti-pattern

1Skills CLI (Vercel)

npx skills add actionbook/rust-skills --skill m15-anti-pattern -a claude-code

2Manually: put the files in place

~/.claude/skills/m15-anti-pattern/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/m15-anti-pattern/

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

Questions about m15-anti-pattern

How do I install m15-anti-pattern in Claude Code?

Run npx skills add actionbook/rust-skills --skill m15-anti-pattern -a claude-code, then run npx skills add actionbook/rust-skills --skill m15-anti-pattern -a claude-code again. The skill file is at ~/.claude/skills/m15-anti-pattern/SKILL.md.

What does m15-anti-pattern do?

It reviews Rust code for recurring anti-patterns including excess cloning, .unwrap() usage, unclear ownership, and questionable unsafe. It suggests directions for more idiomatic code.

Can I invoke m15-anti-pattern with a slash command?

No. Manual invocation is disabled, so it is intended to be used when reviewing code through relevant requests about Rust mistakes and code smells.

Similar skills

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rust-patterns affaan-m Guides your coding agent to write idiomatic Rust using strict ownership rules, typed errors, Cow, and exhaustive pattern matching. CX Codex +1 5,100installs python-anti-patterns Seth Hobson A checklist skill for common Python mistakes. The agent runs it over your code before merge or while debugging. CX Codex 13,278installs test-anti-patterns dotnet Scans test files for anti-patterns: assertions that verify nothing, swallowed exceptions, order-dependent tests, magic values. Works across languages, ranks findings by severity. CX Codex +1 4,400installs rust-systems-programming manutej A skill on systems Rust: ownership, borrowing, threads, async, unsafe and performance. Useful when you write low-level code or port C/C++. CX Codex +1 485installs dotnet-design-pattern-review official github Reviews selected C#/.NET code for design patterns and suggests improvements without editing files. Use it when you need an architecture-focused code review. 11,609installs rust-best-practices apollographql A skill that feeds your agent Apollo GraphQL's Rust handbook: borrowing vs cloning, Result-based errors, Clippy lints, tests. CX Codex +1 21,100installs

From the same set35

coding-guidelines A skill with 50 Rust coding rules: naming, strings, errors, memory, async. Useful during review or when the agent writes a new module. CX Codex +1 4,000installs m10-performance System guidance for agents to optimize Rust code systematically, focusing on profiling and memory allocation control. CX Codex +1 3,600installs m06-error-handling Guides the AI agent through Rust error handling patterns. Useful when deciding between Result, Option, panic!, thiserror, and anyhow. CX Codex +1 3,500installs m07-concurrency Guides Rust concurrency and async decisions, from Send/Sync errors to locks and channels. Use it when spawned tasks, shared state, or deadlocks need design review. CX Codex +1 3,500installs m02-resource Guides AI agents in choosing the right Rust smart pointers and ownership models. Useful when designing data structures or preventing memory leaks. CX Codex +1 3,400installs m05-type-driven This skill helps shape Rust types so invalid states can be rejected by the compiler. Use it for newtypes, type-state APIs, and checked builders. CX Codex +1 3,400installs m04-zero-cost Walks through E0277, E0308 and E0599 and helps you pick between generics and dyn Trait. Useful when Rust trait bounds stop cooperating. CX Codex +1 3,400installs m01-ownership Guides AI agents through Rust ownership and lifetime errors without spraying .clone() calls across the codebase. CX Codex +1 3,400installs

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