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Caveman Review

Turns bloated PR feedback into one-line comments: location, problem, fix.

Dev & CodingBeginner★ 133⑂ 17AI score 9/10Last updated: Apr 20, 2026

What it does

  • Compresses each review finding into a single line: L42: 🔴 bug: problem. fix. (or file:Lnn: for multi-file diffs).
  • Adds optional severity prefixes — 🔴 bug, 🟡 risk, 🔵 nit, ❓ q — so authors instantly know what's blocking.
  • Strips hedging ("I noticed that…", "you might want to consider…") and restatements of the diff, while keeping exact line numbers, backticked symbol names, and a concrete fix.
  • Automatically switches back to full prose for security findings, architectural disagreements, and onboarding contexts where the "why" matters.
  • Fires on "review this PR", "code review", "review the diff", /review, or /caveman-review.

Who it's for

  • Senior engineers and tech leads whose reviews drown the signal in politeness.
  • Open-source maintainers triaging many pull requests per day.
  • Teams that want a consistent, scannable review format.

Examples

  1. Paste a git diff main and ask for a review → get src/api.ts:L23: 🟡 risk: no retry on 429. Wrap in withBackoff(3).
  2. Long function → L88-140: 🔵 nit: 50-line fn does 4 things. Extract validate/normalize/persist.
  3. Security issue → that one finding is written as a full paragraph with rationale and reference, then the rest returns to terse mode.
  4. Say "normal mode" or "stop caveman-review" to revert to verbose reviewing.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/jjmartres/opencode/HEAD/opencode/skills/caveman-review/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the opencode/skills/caveman-review folder from the GitHub repo jjmartres/opencode into my ~/.claude/skills/caveman-review/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/jjmartres/opencode.git /tmp/opencode && mkdir -p ~/.claude/skills && cp -r /tmp/opencode/opencode/skills/caveman-review ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repo into a temp folder: git clone https://github.com/jjmartres/opencode.git /tmp/opencode
  3. Create the skills directory if needed: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r /tmp/opencode/opencode/skills/caveman-review ~/.claude/skills/
  5. Verify with ls ~/.claude/skills/caveman-review — you should see SKILL.md.
  6. Restart Claude Code and try "review this PR" or /caveman-review on a diff.
View source on GitHub ↗License: MIT