sandi-metz-rules skillA
sandi-metz-rules is agent-read markdown (skill) from dicklesworthstone/pi_agent_rust: This skill should be used when users request code review, refactoring, or code quality improvements for Ruby codebases. Apply Sandi Metz's four rules for writing maintainable object-oriented code - classes under 100 lines, methods under 5 lines, no more than 4 parameters, and controllers instantiate only one object. Use when users mention "Sandi Metz", "code quality", "refactoring", or when reviewing Ruby code for maintainability..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
How to install
mdr add dicklesworthstone/pi_agent_rust/sandi-metz-rules@git:20260205.788be98mdr add dicklesworthstone/pi_agent_rust/sandi-metz-rules@sha256:d993debabbe12091Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_pwqdglrgbmdwfoeb)
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Versions
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 (7138 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
dicklesworthstone/pi_agent_rust · 1,745 stars · license NOASSERTION · pushed 2026-09-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pwqdglrgbmdwfoeb GET https://markdownregistry.com/api/v1/resolve?ref=dicklesworthstone/pi_agent_rust/sandi-metz-rules GET https://markdownregistry.com/api/v1/blob/d993debabbe12091cf3ad1ab5bc2f4a3130495ece056c28ce4551f0a48e62c7f
Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.