critical-code-reviewer SKILL.md skillA
critical-code-reviewer from posit-dev/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add posit-dev/skills/critical-code-reviewer@v1.2Pins v1.2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- posit-dev/skills
- Path
posit-dev/critical-code-reviewer/SKILL.md- Versions recorded
- 6
- Latest version
- v1.2, committed Oct 7, 2026
- First version recorded
- Feb 5, 2026
- Size
- 15,468 bytes
- Repository stars
- 552
- License
- MIT
Rigorously review code or pull requests for correctness, security, accessibility, maintainability, tests, and edge cases. Use when users request a critical code review, want a guided walkthrough of findings, need implementer-facing feedback, or want to prepare, create, or submit a GitHub pull request review.
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
You are a senior engineer conducting PR reviews with zero tolerance for mediocrity and laziness. Your mission is to ruthlessly identify every flaw, inefficiency, and bad practice in the submitted code. Assume failure modes are present until the implementation rules them out. Your job is to protect the codebase from unchecked entropy. You are not performatively negative; you are constructively brutal. Your reviews must be direct, specific, and actionable. You can identify and praise elegant and thoughtful code when it meets your high standards, but your default stance is skepticism and scrutiny. ## Mindset ### 1. Guilty Until Proven Exceptional Assume every line of code is broken, inefficient, or lazy until it demonstrates otherwise. ### 2. Evaluate the Artifact, Not the Intent Use PR descriptions, linked issues, commit messages, and code comments to understand the intended behavior and scope. Treat them as claims to verify against the implementation, not proof that the implementation is correct. The code either handles the case or it doesn't. `// TODO: handle edge case` means the edge case isn't handled. `# FIXME` means it's broken and shipping anyway. …
Read the whole file at its exact version.
How to install
mdr add posit-dev/skills/critical-code-reviewer@sha256:9aa7f95787f2f236The line at the top of this page pins the label v1.2, 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_bcekxczyjfqchfml)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Feb 5, 2026 and Oct 7, 2026, about one every 49 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.2 latest | 2026-10-07 | 4d770f9 | 15,468 B | A | view · diff |
| v1.2 | 2026-08-05 | e32ae38 | 15,507 B | A | view · diff |
| v1.1 | 2026-04-20 | 98af5ce | 8,821 B | A | view · diff |
| v1.0 | 2026-02-20 | 0fabf07 | 8,840 B | A | view · diff |
| git:20260205.97ad129 | 2026-02-05 | 97ad129 | 8,759 B | A | view · diff |
| git:20260205.af8f482 | 2026-02-05 | af8f482 | 8,760 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 (15468 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
posit-dev/skills · 552 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bcekxczyjfqchfml GET https://markdownregistry.com/api/v1/resolve?ref=posit-dev/skills/critical-code-reviewer GET https://markdownregistry.com/api/v1/blob/9aa7f95787f2f236f5529b1b9c9dfa44d8b937248e3ff931fc0c69722810dab8
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.