rust-idioms SKILL.md skillA
rust-idioms from kalarislabs/skill-doctor is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kalarislabs/skill-doctor/rust-idioms@git:20260910.eee8645Pins git:20260910.eee8645 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kalarislabs/skill-doctor
- Path
skills/rust-idioms/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260910.eee8645, committed Sep 10, 2026
- Size
- 1,531 bytes
- Repository stars
- 14
- License
- Apache-2.0
Everyday Rust engineering for Skill Doctor — errors, ownership, clippy, APIs, iterators. Use when writing or reviewing Rust that is not specifically about perf, unsafe, or YARA.
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 idioms
## Errors
- Libraries: `thiserror` enums. No `unwrap` / `expect` on recoverable paths.
- Binary: `anyhow` at `main` only. Map to exit codes in one place.
- Do not `panic` in L1 because a skill file is malformed. Malformed input is a finding or a skipped file with coverage reduced.
## Ownership
- Hot path: borrow (`&[u8]`, `&str`, `&Path`). Own only when storing in a `Finding`.
- Do not `clone()` to satisfy the borrow checker if a lifetime or `Arc` would do. Clippy `clone_on_copy` / needless clones must stay clean.
- `PathBuf` walks: collect sorted `Vec<PathBuf>` once, then iterate. Do not `read_dir` twice.
## APIs
- Public core API is small: `scan_bundle(&[u8] | &Path) -> Result<Report>`.
- Rule IDs and SD class IDs are `&'static str` or newtypes, not free-form `String` invented at runtime.
- Prefer `enum Severity { Low, Medium, High, Critical }` over strings.
## Clippy / fmt
- `cargo fmt --all` is not optional.
- `clippy --all-targets -- -D warnings` is the style guide. Do not fight clippy with `#[allow]` unless the allow cites an invariant.
- `unsafe` is not an idiom. Load `unsafe-sandbox` instead.
## Concurrency
- L1 fan-out: `rayon`. No `tokio` in core.
…Read the whole file at its exact version.
How to install
mdr add kalarislabs/skill-doctor/rust-idioms@sha256:1f0efaf52c6f1832The line at the top of this page pins the label git:20260910.eee8645, 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_34dc4iprgmg25f67)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 10, 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 (1531 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
kalarislabs/skill-doctor · 14 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_34dc4iprgmg25f67 GET https://markdownregistry.com/api/v1/resolve?ref=kalarislabs/skill-doctor/rust-idioms GET https://markdownregistry.com/api/v1/blob/1f0efaf52c6f18320627054c51922e4ebbfa746b6a5c2aa11775f1081357b0a7
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.