rust-best-practices SKILL.md skillA
rust-best-practices from ryo-ebata/cc-audit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ryo-ebata/cc-audit/rust-best-practices@git:20260128.b3d3d80Pins git:20260128.b3d3d80 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ryo-ebata/cc-audit
- Path
.claude/skills/rust-best-practices/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260128.b3d3d80, committed Jan 28, 2026
- Size
- 7,545 bytes
- Repository stars
- 26
- License
- MIT
Rust coding best practices for cc-audit development. Use when writing new Rust code, reviewing code, or refactoring. Covers error handling, safety, performance, and idiomatic patterns.
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 Best Practices for cc-audit
## Error Handling
### Prefer `?` Over `unwrap()`
```rust
// BAD: Panics on error
let content = fs::read_to_string(path).unwrap();
// GOOD: Propagates error
let content = fs::read_to_string(path)?;
// GOOD: With context
let content = fs::read_to_string(path)
.map_err(|e| ScanError::IoError { path: path.into(), source: e })?;
```
### Use `thiserror` for Custom Errors
```rust
use thiserror::Error;
#[derive(Error, Debug)]
pub enum ScanError {
#[error("failed to read file: {path}")]
IoError {
path: PathBuf,
#[source]
source: std::io::Error,
},
#[error("invalid pattern: {0}")]
InvalidPattern(String),
}
```
### When `unwrap()` is Acceptable
- In tests
- After validation guarantees success
- With `unreachable!()` comment explaining why
```rust
// OK: We just checked is_some()
if value.is_some() {
let v = value.unwrap(); // Known safe
}
// BETTER: Use if-let or match
if let Some(v) = value {
// use v
}
```
## Option and Result Patterns
### Prefer Combinators
```rust
// BAD: Verbose match
let result = match opt {
Some(v) => Some(v.to_uppercase()),
None => None,
};
…Read the whole file at its exact version.
How to install
mdr add ryo-ebata/cc-audit/rust-best-practices@sha256:a6372b3aba92077bThe line at the top of this page pins the label git:20260128.b3d3d80, 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_g6ukycftxknpzgmb)
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Versions
The registry has recorded 1 version of this file, committed on Jan 28, 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 (7545 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
ryo-ebata/cc-audit · 26 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_g6ukycftxknpzgmb GET https://markdownregistry.com/api/v1/resolve?ref=ryo-ebata/cc-audit/rust-best-practices GET https://markdownregistry.com/api/v1/blob/a6372b3aba92077b8bb15fc31350e19cb8e8fdd05cac8d37dc74d1a1ba0e6a11
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.
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