What do I need to use Feynman Explainer?

The concept; Your explanation; Why you need it; Your current confidence.

Is Feynman Explainer free to use?

Yes — run it free in the browser playground (no API key needed for the sponsored trial, or bring any provider key), or install it into Claude Code, Cursor, ChatGPT and more via npx pm-claude-skills. MIT-licensed and open source.

Feynman Explainer

Q: How do I know the Feynman Explainer output is good?

The skill verifies itself against its own quality checks: Prompts a genuine plain-language explanation; Catches vagueness, circularity, and jargon-hiding; Converts fuzzy spots into specific named gaps; Gives fill-the-gap guidance and a re-explain loop.

🔵 Stable🕐 updated 2026-08-06 🔷 SkillSpec L3 pm-learning

Learn something deeply by trying to explain it simply — the Feynman technique — surfacing exactly the gaps where your understanding is fake. Use when asked help me really understand X, explain this back to check my understanding, use the Feynman technique on, or do I actually get this. Produces a prompt to explain the concept in plain language yourself, a check that flags where your explanation went vague, hand-wavy, or jargon-hid a gap, the specific things you don't actually understand yet, and how to close each — because if you can't explain it simply, you don't really know it.

▶ Run it free — no key needed 📝 Grade your existing draft View SKILL.md ↗

🗣 Say this to your agent

“Help me really understand how interest rates work — I'll explain, you find my gaps.”“Use the Feynman technique on this concept with me.”“Let me explain this back — do I actually get it?”“I think I understand recursion but I'm not sure. Test me.”“Check my understanding of this by making me explain it simply.”

What to give it

▸The concept — what you're trying to understand

▸Your explanation — your attempt to explain it simply (this is the raw material)

▸Why you need it — an exam, a decision, teaching someone, genuine curiosity

▸Your current confidence — sure you get it, or suspect you don't

✅ The bar it holds itself to

Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.

✓Prompts a genuine plain-language explanation

✓Catches vagueness, circularity, and jargon-hiding

✓Converts fuzzy spots into specific named gaps

✓Gives fill-the-gap guidance and a re-explain loop

✓Uses the "explain to a 12-year-old" bar

⚠️ What it refuses to do

**Accepting a jargon-filled explanation** as understanding.

**Explaining it *for* them** instead of catching their gaps.

**Vague "you could go deeper"** instead of named gaps.

**Skipping the re-explain loop.**

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcp

Related skills

🔌 Embed this skill

Drop this on your blog, docs, or site — it renders a "Run this skill" card:

<div data-pm-skill="feynman-explainer"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>

💬 Discussion

Feynman Explainer is one of 1078 open-source professional AI agent skills — all SkillSpec L3. Try them all in the browser · ⭐ Star on GitHub · Browse the full catalog