refactor-rust SKILL.md skillA
refactor-rust from univers42/claude-deal-with-the-devil is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add univers42/claude-deal-with-the-devil/refactor-rust@git:20260930.dc5adefPins git:20260930.dc5adef in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- univers42/claude-deal-with-the-devil
- Path
skills/refactor-rust/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260930.dc5adef, committed Sep 30, 2026
- Size
- 3,786 bytes
- Repository stars
- 4
- License
- none declared
Rust norms: borrowing over cloning, newtypes over primitive obsession, module layout that mirrors the domain and no panics on a public path. Use when editing Rust files.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Rust Refactoring ## Idioms - Max 40 lines per function. Max 4 parameters; beyond that, a struct with a builder only if the builder earns its rung (`rules/minimalism-ladder.md`). - Borrow by default. Take `&str` not `String`, `&[T]` not `Vec<T>`, and return owned values only when the caller needs ownership. - `impl Trait` in argument position for simple generic bounds; a named generic when the caller must be able to name the type. - Derive rather than implement: `Debug`, `Clone`, `PartialEq`, `Default` — hand-written versions drift from the fields. - Newtypes over primitive obsession: `struct UserId(u64)` makes the wrong argument a compile error. - Modules mirror the domain, not the layer. `pub(crate)` by default; `pub` is a contract (the `api-convention` skill). ## Errors are types, not strings - Libraries define an error enum with `thiserror`; binaries use `anyhow` at the edge. Do not make a library return `anyhow::Error` — it erases the match. - `?` for propagation. Never `.unwrap()` or `.expect()` on a path that can fail at runtime; in tests and in `main` they are fine, and `expect` there carries the reason. …
Read the whole file at its exact version.
How to install
mdr add univers42/claude-deal-with-the-devil/refactor-rust@sha256:0068cacf141a8660The line at the top of this page pins the label git:20260930.dc5adef, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_56zgdirv2u64tlgf)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 30, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3786 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
univers42/claude-deal-with-the-devil · 4 stars · license none declared · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_56zgdirv2u64tlgf GET https://markdownregistry.com/api/v1/resolve?ref=univers42/claude-deal-with-the-devil/refactor-rust GET https://markdownregistry.com/api/v1/blob/0068cacf141a8660280ca488e33951cdda211db3db5defa75e7d2abddd296bca
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.