sota-ruby SKILL.md skillA
sota-ruby from martinholovsky/sota-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add martinholovsky/sota-skills/sota-ruby@git:20261026.808c340Pins git:20261026.808c340 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- martinholovsky/sota-skills
- Path
skills/sota-ruby/SKILL.md- Versions recorded
- 15
- Latest version
- git:20261026.808c340, committed Oct 26, 2026
- First version recorded
- Jul 4, 2026
- Size
- 10,243 bytes
- Repository stars
- 26
- License
- CC-BY-4.0
State-of-the-art Ruby engineering rules (supported Ruby releases) that Claude applies when writing or auditing Ruby. Covers modern idioms (frozen string literals, pattern matching, Data/Struct, RBS/Sorbet/Steep typing), security (SQL injection via ActiveRecord/Sequel, ERB/XSS escaping, mass assignment, CSRF, Marshal/YAML deserialization, command injection, ReDoS), framework-neutral web hardening (Rails/Sinatra/Hanami as neutral examples), supply chain and tooling…
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
# SOTA Ruby (2026) Expert-level rules for producing and auditing production Ruby. Baseline language line: **Ruby 3.4+**; Ruby 4.0 was released 2025-12-25 and is in normal maintenance (latest stable — verify at the branches page). Per the [official branches page](https://www.ruby-lang.org/en/downloads/branches/): 4.0 and 3.4 are in normal maintenance; 3.3 is security-maintenance only (expected EOL 2027-03); 3.2 and older are EOL (3.2 since 2026-04-01) — running them is itself a finding. Feature notes: `Data.define` and `Regexp.timeout` from 3.2, `it` block parameter and chilled-string warnings from 3.4, `Ractor::Port` and experimental ZJIT from 4.0 — noted where relevant. Every rules file ends with an audit checklist of grep/lint patterns. ## Purpose Two consumers, one source of truth: - **BUILD mode** — generating new Ruby code: follow the rules as defaults, not suggestions. Deviate only with an explicit comment justifying it. - **AUDIT mode** — reviewing existing Ruby code: hunt violations using the audit checklists, classify by severity, report in the finding format below. ## BUILD mode 1. Before writing code, read the rules files relevant to the task (see index). …
Read the whole file at its exact version.
How to install
mdr add martinholovsky/sota-skills/sota-ruby@sha256:a447c28a6d42816fThe line at the top of this page pins the label git:20261026.808c340, 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_er47waoqsggukbmc)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 15 versions of this file, between Jul 4, 2026 and Oct 26, 2026, about one every 8 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261026.808c340 latest | 2026-10-26 | 808c340 | 10,243 B | A | view · diff |
| git:20261025.4bffa60 | 2026-10-25 | 4bffa60 | 10,069 B | A | view · diff |
| git:20261025.edb0d8a | 2026-10-25 | edb0d8a | 10,010 B | A | view · diff |
| git:20261025.c05557f | 2026-10-25 | c05557f | 9,756 B | A | view · diff |
| git:20261024.8dd2b0a | 2026-10-24 | 8dd2b0a | 9,651 B | A | view · diff |
| git:20261012.ae1b29b | 2026-10-12 | ae1b29b | 9,410 B | A | view · diff |
| git:20260926.e89beb1 | 2026-09-26 | e89beb1 | 8,849 B | A | view · diff |
| git:20260925.0da8106 | 2026-09-25 | 0da8106 | 8,856 B | A | view · diff |
| git:20260925.9af1226 | 2026-09-25 | 9af1226 | 8,596 B | A | view · diff |
| git:20260925.51daf1f | 2026-09-25 | 51daf1f | 8,405 B | A | view · diff |
| git:20260923.4e0bd2c | 2026-09-23 | 4e0bd2c | 8,309 B | A | view · diff |
| git:20260923.8c48a32 | 2026-09-23 | 8c48a32 | 8,233 B | A | view · diff |
| git:20260820.7720f5a | 2026-08-20 | 7720f5a | 8,114 B | A | view · diff |
| git:20260710.0c49830 | 2026-07-10 | 0c49830 | 8,040 B | A | view · diff |
| git:20260704.67df0cc | 2026-07-04 | 67df0cc | 8,042 B | A | view |
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 (10243 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
martinholovsky/sota-skills · 26 stars · license CC-BY-4.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_er47waoqsggukbmc GET https://markdownregistry.com/api/v1/resolve?ref=martinholovsky/sota-skills/sota-ruby GET https://markdownregistry.com/api/v1/blob/a447c28a6d42816ff9c0649dd498e15d1c682b7453e6d5343196aac115d05750
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.