cargo-fallow SKILL.md skillA
cargo-fallow from fallow-rs/fallow-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fallow-rs/fallow-skills/cargo-fallow@git:20261105.7a3bde1Pins git:20261105.7a3bde1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fallow-rs/fallow-skills
- Path
fallow/skills/cargo-fallow/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261105.7a3bde1, committed Nov 5, 2026
- Size
- 7,099 bytes
- Repository stars
- 137
- License
- MIT
Codebase analysis for Rust workspaces with `cargo fallow`. Finds unused dependencies, unused source files, `pub` items that can be private, boundary violations, large files and functions, complex functions, duplicated code and public API changes, and runs mutation testing. Use when asked to audit a Rust workspace or a Rust change before a commit or a PR, find unused dependencies or dead code in Rust, narrow visibility, check crate boundaries, detect duplication, gate CI, or run cargo fallow.
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
# cargo-fallow: codebase analysis for Rust workspaces `cargo fallow` reads a Cargo workspace and reports what the code does not need and where the code is hard to change. It uses the syntax of the code and `cargo metadata`. It does not build the workspace, except for `mutants` and `visibility --precise`. ## When to use - Find unused dependencies in `Cargo.toml` (`deps`). - Find `.rs` files that no target compiles (`files`). - Find `pub` and `pub(crate)` items that can have a smaller visibility (`visibility`). - Check crate, module and source rules (`boundaries`). - Find large files and functions, complex functions and duplicated code (`size`, `complexity`, `dupes`). - Report the public API changes of the published libraries (`api --base`). - Test the tests with small changes in the source (`mutants`). - Check a change before a commit or a PR (`check --changed-since`). - Set up CI gates and a baseline for existing findings (`init`). ## When not to use - Type errors or borrow errors: use `cargo check`. - Lints of style: use `cargo clippy`. Format: use `cargo fmt`. - Security advisories of dependencies: cargo-fallow does not check them. …
Read the whole file at its exact version.
How to install
mdr add fallow-rs/fallow-skills/cargo-fallow@sha256:091307893da06d5dThe line at the top of this page pins the label git:20261105.7a3bde1, 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_6s7hwiaqvc7qzgwy)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Nov 5, 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 (7099 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
fallow-rs/fallow-skills · 137 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6s7hwiaqvc7qzgwy GET https://markdownregistry.com/api/v1/resolve?ref=fallow-rs/fallow-skills/cargo-fallow GET https://markdownregistry.com/api/v1/blob/091307893da06d5d05bfadbec61032d07ac21028803b2e79775d94ce2c148a90
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.