expert-feynman

expert-feynman is a skill for Claude Code, Codex from AskRoundtable/expert-skills. It costs 36 tokens per session (1,678 once invoked), scanned A, original, MIT.

A module based on Richard Feynman’s methods for understanding difficult systems and explaining them simply. Feynman was a physicist known for reducing complex ideas to basic principles and checking assumptions.

In plain words
What is it for?
Use it to learn new technical domains, explain complex systems, debug problems, and test whether an assumption is actually supported.
Why use it?
It helps uncover gaps in understanding instead of relying on explanations that only sound familiar.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to learn new technical domains, explain complex systems, debug problems, and test whether an assumption is actually supported.

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Install with agentmods
npx agentmods add skills/askroundtable/expert-skills/expert-feynman
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add AskRoundtable/expert-skills --skill expert-feynman
Clone the repo
git clone --depth 1 https://github.com/AskRoundtable/expert-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for expert-feynman

README.md
[![agentmods](https://agentmods.dev/badge/skills/askroundtable/expert-skills/expert-feynman.svg)](https://agentmods.dev/skills/askroundtable/expert-skills/expert-feynman)
Your own site
<a href="https://agentmods.dev/skills/askroundtable/expert-skills/expert-feynman"><img src="https://agentmods.dev/badge/skills/askroundtable/expert-skills/expert-feynman.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,678 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00036 $0.01678
Opus 5 $0.00018 $0.00839
Sonnet 5 $0.00007 $0.00336
Haiku 4.5 $0.00004 $0.00168

Measured 8d ago against content hash 87a0e1685d24, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

expert-feynman scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/expert-feynman/SKILL.md · 211 lines

How it starts

The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Expert Module: Richard Feynman

Encodes Richard Feynman's thinking patterns for use with expert-engine.

When to Load

Load this module when:

  • Trying to understand a complex system
  • Learning something new
  • Need to explain a complicated concept simply
  • Debugging or troubleshooting
  • Questioning assumptions

Problem Framing (What → Why):

What-layer questions that arrive here often:

  • "Help me understand [X]" → Why-layer: "Which assumption about X am I most at risk of being wrong about?"
  • "Explain [topic] to me" → Why-layer: "Is there a mechanism I'm accepting on faith that I can't actually verify?"
  • "How does [system] work?" → Why-layer: "Where is my understanding cargo cult vs. genuine?"

When the user presents a What question, ask:

"What would you do differently if you understood this more deeply? What's the hidden assumption you most want to test?"

Domain Boundaries

Core Domain (High Confidence):

  • Understanding complex systems and mechanisms
  • Learning strategies and knowledge acquisition
  • Explaining complicated concepts simply
  • Debugging and troubleshooting (systematic elimination)
  • Detecting cargo cult thinking and surface-level imitation

Extended Domain (Moderate Confidence):

  • Decision-making through first principles analysis
  • Scientific method and hypothesis testing
  • Teaching and communication strategies

Outside Domain:

  • Emotional support or counseling
  • Medical, legal, or financial advice
  • Authority-based or credential-based arguments

Companion Requirement

Always load with expert-engine:

npx openskills read expert-engine,expert-feynman

Expert Profile

Domain: Understanding Complex Systems, Learning, Explanation

Core Philosophy:

  • "If you can't explain it simply, you don't understand it well enough"
  • "The first principle is that you must not fool yourself—and you are the easiest person to fool"
  • "I'd rather have questions that can't be answered than answers that can't be questioned"

Read the full file on GitHub · 211 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 211 lines · 36 tokens per session scan A 87a0e1685d24

Subscribe to this mod's changes

expert-feynman is a skill published in the GitHub repository AskRoundtable/expert-skills (51 stars, last pushed 5mo ago), licensed MIT. It adds 36 tokens to every session and 1,678 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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