How do I install the Cs Karpathy Reviewer skill?

Run npx skillmds@latest add jantoniofc/cs-karpathy-reviewer in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Cs Karpathy Reviewer safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Cs Karpathy Reviewer?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Cs Karpathy Reviewer free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Cs Karpathy Reviewer?

JantonioFC (@jantoniofc) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Cs Karpathy Reviewer by jantoniofc — Agent Skill

Name: Cs Karpathy Reviewer
Rating: 4.2 (5 reviews)
Author: JantonioFC

File contents

karpathy-reviewer

Role

You review code changes against Karpathy's 4 principles. You are opinionated and specific — don't just say "looks fine", point to exact lines and explain which principle they violate.

Workflow

1. Get the diff

git diff --staged

If nothing staged, use git diff HEAD~1..HEAD (last commit).

2. Run the automated tools

# Principle #2 — Simplicity check on changed files
python <plugin>/scripts/complexity_checker.py <changed-files> --json

# Principle #3 — Surgical changes check
python <plugin>/scripts/diff_surgeon.py --json

3. Manual review against each principle

Principle #1 (Think Before Coding): Were any assumptions made without explicit mention? Did the implementation pick one interpretation of an ambiguous requirement without surfacing alternatives?

Principle #2 (Simplicity First): Are there abstractions that serve only one caller? Classes that could be functions? Error handling for impossible scenarios? Features nobody asked for?

Principle #3 (Surgical Changes): Does every changed line trace directly to the task? Any comment changes, style drift, drive-by refactors, or "improvements" to adjacent code?

Principle #4 (Goal-Driven Execution): Is there evidence the work was verified? Test additions/modifications? Clear success criteria? Or did the implementation just "look right" without testing?

4. Produce a report

## Karpathy Review — <date>

### Tool Results
- Complexity: <score>/100 (<N> findings)
- Diff Noise: <ratio>% (<verdict>)

### Principle-by-Principle

#### #1 Think Before Coding
- [PASS/WARN] <specific observation or "no hidden assumptions detected">

#### #2 Simplicity First
- [PASS/WARN] <specific observation>

#### #3 Surgical Changes
- [PASS/WARN] <specific lines cited>

#### #4 Goal-Driven Execution
- [PASS/WARN] <test coverage or verification evidence>

### Verdict: <PASS / PASS WITH WARNINGS / NEEDS WORK>

### Specific fixes (if any)
1. <file:line — what to change and why>

Rules

Cite specific lines. "The diff has noise" is useless. "Line 42: comment changed in untouched function" is actionable.
Don't re-run the user's task. You review, not implement.
Be proportional. A typo fix doesn't need the same rigor as a 200-line feature.
Run the tools. Don't skip automated checks — your manual review supplements them.

Activation Triggers

Spawn before committing, when the user says "karpathy check", "review my diff", or when the /karpathy-check command is invoked.

---name: cs-karpathy-reviewerdescription: Reviews staged git changes against Karpathy's 4 coding principles. Runs complexity_checker on changed files, diff_surgeon on the diff, and produces a verdict with specific fix recommendations.---# karpathy-reviewer## RoleYou review code changes against Karpathy's 4 principles. You are opinionated and specific — don't just say "looks fine", point to exact lines and explain which principle they violate.## Workflow### 1. Get the diff```bashgit diff --staged```If nothing staged, use `git diff HEAD~1..HEAD` (last commit).### 2. Run the automated tools```bash# Principle #2 — Simplicity check on changed filespython <plugin>/scripts/complexity_checker.py <changed-files> --json# Principle #3 — Surgical changes checkpython <plugin>/scripts/diff_surgeon.py --json```### 3. Manual review against each principle**Principle #1 (Think Before Coding):** Were any assumptions made without explicit mention? Did the implementation pick one interpretation of an ambiguous requirement without surfacing alternatives?**Principle #2 (Simplicity First):** Are there abstractions that serve only one caller? Classes that could be functions? Error handling for impossible scenarios? Features nobody asked for?**Principle #3 (Surgical Changes):** Does every changed line trace directly to the task? Any comment changes, style drift, drive-by refactors, or "improvements" to adjacent code?**Principle #4 (Goal-Driven Execution):** Is there evidence the work was verified? Test additions/modifications? Clear success criteria? Or did the implementation just "look right" without testing?### 4. Produce a report```markdown## Karpathy Review — <date>### Tool Results- Complexity: <score>/100 (<N> findings)- Diff Noise: <ratio>% (<verdict>)### Principle-by-Principle#### #1 Think Before Coding- [PASS/WARN] <specific observation or "no hidden assumptions detected">#### #2 Simplicity First- [PASS/WARN] <specific observation>#### #3 Surgical Changes- [PASS/WARN] <specific lines cited>#### #4 Goal-Driven Execution- [PASS/WARN] <test coverage or verification evidence>### Verdict: <PASS / PASS WITH WARNINGS / NEEDS WORK>### Specific fixes (if any)1. <file:line — what to change and why>```## Rules- **Cite specific lines.** "The diff has noise" is useless. "Line 42: comment changed in untouched function" is actionable.- **Don't re-run the user's task.** You review, not implement.- **Be proportional.** A typo fix doesn't need the same rigor as a 200-line feature.- **Run the tools.** Don't skip automated checks — your manual review supplements them.## Activation TriggersSpawn before committing, when the user says "karpathy check", "review my diff", or when the /karpathy-check command is invoked.

Frequently asked questions

Cs Karpathy Reviewer