Is the Summary skill free?

Yes. The skill itself is free from brsbl/ottonomous. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Summary SkillProof Score?

8.8/10 — installs cleanly 4/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 4/5.

How do I install Summary?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Summary with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Summary

Turns a git diff into a structured, linked HTML PR summary — but needs `npm install` first, undocumented.

by brsbl · brsbl/ottonomous

Works with setup

Install — copy the command Download source ↗

Test report

Verdict: Works with setup
Score: 8.8/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 14dbefa

Ran it for real on a throwaway git repo: the structured per-file breakdown caught a genuine bug (permanent account lockout with no reset path, and a race condition) that a plain baseline summary glossed over — but the bundled md-to-html.js needs `npm install` for marked/highlight.js first, and that step is nowhere in the SKILL.md.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 4/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 4/5

What Summary does

Reads the diff between main and HEAD (or staged changes), synthesizes a structured semantic summary (overview, review-risk areas, per-file breakdown, breaking changes, files-changed table with GitHub links), then converts it to a styled HTML page via a bundled Node script and opens it. Use when writing PR summaries, release notes, or change overviews.

How to install Summary

git clone https://github.com/brsbl/ottonomous
mkdir -p ~/.claude/skills
cp -r ottonomous/skills/summary ~/.claude/skills/summary
cd ~/.claude/skills/summary && npm install

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Summary

/summary Turns a git diff into a structured, linked HTML PR summary — but needs `npm install` first, undocumented.

It also activates on plain-language prompts like these:

Turn the diff between main and my branch into a PR summary page
Summarize my staged changes into a styled HTML overview I can open
What are the breaking changes and review risks in this diff?

Frequently asked questions

Is the Summary skill free?: Yes. The skill itself is free from brsbl/ottonomous. SkillProof publishes the install command and an independent test verdict at no cost.
Does Summary work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Works with setup. Ran it for real on a throwaway git repo: the structured per-file breakdown caught a genuine bug (permanent account lockout with no reset path, and a race condition) that a plain baseline summary glossed over — but the bundled md-to-html.js needs `npm install` for marked/highlight.js first, and that step is nowhere in the SKILL.md.
What is the Summary SkillProof Score?: 8.8/10 — installs cleanly 4/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 4/5.
How do I install Summary?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Summary with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.