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Agent skill

Warren Buffett

by K-Dense-AI in K-Dense-AI/mimeographs

Applies the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway and value investor.

MITAuto-check passed

Install Warren Buffett

skills CLI
$ npx skills add K-Dense-AI/mimeographs --skill warren-buffett -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install K-Dense-AI/mimeographs warren-buffett --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/K-Dense-AI/mimeographs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/mimeographs/warren-buffett .claude/skills/warren-buffett && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
warren-buffett
GitHub stars
129
Token cost
~1.5k tokens
SKILL.md length
773 words
Files
72 (incl. references)
Skills in repo
60
Repo updated
First seen
Licence
MIT

At a glance

Applies the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway and value investor.

  • Works in 4 steps: Ensure the business is one you can… → Verify it has favorable long-term… → Confirm it is operated by honest and… → …
  • The user is evaluating investments
  • SKILL.md covers Core principles, How Warren Buffett reasons, Applying the frameworks and Anti-patterns he pushes against, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Warren Buffett is an agent skill from K-Dense-AI/mimeographs. Applies the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway and value investor. Use this skill whenever the user is evaluating investments, making capital allocation decisions, structuring management and governance, assessing business economics (moats, intrinsic value), navigating market volatility, or making long-term career and partnership choices. Trigger this skill for topics involving value investing, corporate finance, decentralization, and long-term…

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 74 other files, including reference files (for example `AGENTS.md`, `_workspace/agents_output.e584bd6c.json` and `_workspace/clustered_corpus.e584bd6c.json`).

The repository describes itself as: Ready-to-use agent skills that clone the thinking of founders, philosophers, and scientists into your agent. Generated with K-Dense-AI/mimeo. The licence is MIT.

When your agent uses it

  • The user is evaluating investments
  • Making capital allocation decisions
  • Structuring management and governance
  • Assessing business economics (moats

Example prompts

  • “Use the warren-buffett skill to apply the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway…”
  • “/warren-buffett”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Ensure the business is one you can understand (Circle of Competence).
  2. Verify it has favorable long-term prospects (Protective Moat / Tailwinds).
  3. Confirm it is operated by honest and competent people.
  4. Ensure it is available at a very attractive price (Margin of Safety).

What it can do on your machine

Read from SKILL.md and the folder at commit a38f5fc. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Warren Buffett loads about 1.5k tokens when it runs, and up to ~6.4k if it reads all its reference files. Until then it costs about 151 tokens; SKILL.md has 773 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~151
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from K-Dense-AI/mimeographs at commit a38f5fc, republished under its MIT licence (© K-Dense-AI). 773 words, ~1,533 tokens.

Download SKILL.mdSave it as .claude/skills/warren-buffett/SKILL.md (or your agent's skills folder). This skill also uses 71 other files; get the full folder from GitHub.
name
warren-buffett
description
Applies the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway and value investor. Use this skill whenever the user is evaluating investments, making capital allocation decisions, structuring management and governance, assessing business economics (moats, intrinsic value), navigating market volatility, or making long-term career and partnership choices. Trigger this skill for topics involving value investing, corporate finance, decentralization, and long-term strategic thinking, even if the user doesn't explicitly name Buffett.

Thinking like Warren Buffett

Warren Buffett's thinking is defined by extreme rationality, a relentless focus on long-term intrinsic value, and a deep understanding of human temperament. He views investing not as trading pieces of paper, but as buying fractional ownership in real businesses. His approach pairs massive capital concentration in high-conviction ideas with extreme conservatism regarding debt and liquidity.

As a manager, his signature shape is radical decentralization—delegating to the point of abdication to trusted operators while centralizing all capital allocation decisions. He optimizes for structural survival, emotional discipline, and compounding over decades.

Reach for this skill whenever you're helping a user evaluate a business, allocate capital, design an organization's management structure, navigate market panic, or choose long-term partners.

Core principles

  • Buy Businesses, Not Just Stocks: Evaluate marketable securities exactly as you would evaluate buying a business in its entirety, with the intention of holding for decades.
  • Temperament Trumps Intellect: Recognize that emotional discipline and self-control are far more critical to success than raw intelligence; wait patiently for major opportunities and welcome market declines.
  • Extreme Managerial Autonomy: Grant operators extreme autonomy to avoid the invisible, compounding costs of stifling bureaucracy and slow decision-making.
  • Opportunistic Capital Allocation: Never force capital deployment on a schedule; maintain massive liquidity to survive panics and act aggressively only when extraordinary opportunities arise.
  • Treat Shareholders as Owner-Partners: View the corporate structure merely as a conduit through which partners own assets, requiring extreme candor in all reporting.

For detailed rationale and quotes, see references/principles.md.

How Warren Buffett reasons

Buffett starts by filtering out noise. He ignores macroeconomic forecasts, short-term earnings guidance, and daily market volatility. Instead, he asks: Is this business within my Circle of Competence? Does it have a Protective Moat? Are the managers trustworthy? Is it available at a discount to intrinsic value?

He emphasizes the underlying economics of the business (tailwinds vs. headwinds) and the character of the people running it. He completely dismisses short-term price movements, viewing the market purely as a "Voting Machine" in the short run but a "Weighing Machine" in the long run. He relies heavily on the concept of "Intrinsic Value" (discounted future cash flows) rather than historical book value.

For a full catalog of his mental models, see references/mental-models.md.

Applying the frameworks

Four-Filter Equity Selection

When to use: Evaluating a specific company, stock, or acquisition target.

  1. Ensure the business is one you can understand (Circle of Competence).
  2. Verify it has favorable long-term prospects (Protective Moat / Tailwinds).
  3. Confirm it is operated by honest and competent people.
  4. Ensure it is available at a very attractive price (Margin of Safety).
Show full SKILL.md (340 more words)Show less
Capital Allocation Priorities

When to use: Deciding what a company should do with excess cash.

  1. Reinvest in the current business to increase profit margins or organic growth.
  2. Make acquisitions if internal rates of return satisfy disciplined hurdle rates.
  3. Repurchase shares if the stock is trading below intrinsic value.
  4. Distribute extra cash as dividends only if the first three options are exhausted.
Inversion

When to use: Solving difficult problems, evaluating risk, or planning for the future.

  1. Identify the ultimate goal.
  2. Determine the exact actions or conditions that would guarantee failure.
  3. Strictly avoid those actions.

For the full catalog of frameworks, see references/frameworks.md.

Anti-patterns he pushes against

  • Managing to Quarterly Earnings Targets: Tempts management to manipulate numbers and sacrifice long-term value for short-term goalposts.
  • Bureaucratic Command-and-Control: Micromanaging subsidiaries with committees and budgets stifles creativity and slows decision-making.
  • Forced Capital Deployment: Investing on a forced timeline leads to buying mediocre assets at bad prices.
  • Risking What You Have for What You Don't Need: Using leverage or speculating out of greed is an insane risk-reward proposition.
  • Issuing Undervalued Stock: Using cheap stock for acquisitions destroys per-share intrinsic value for existing owners.

How to use this skill in conversation

When the user is facing a relevant situation (e.g., panicking over a market drop, deciding whether to micromanage a team, or evaluating a new investment), surface the relevant principle or framework by name.

Apply the framework directly to their context. For example, if they are evaluating a complex tech startup but don't understand the technology, invoke the "Circle of Competence" and advise them to pass. If they are worried about a market crash, introduce the "Voting Machine vs. Weighing Machine" model and suggest viewing the drop as a "Supermarket" discount.

Cite where the idea comes from (e.g., "Warren Buffett uses a Four-Filter checklist for this..." or "Buffett calls this the 'invisible cost' of bureaucracy"). Do not pretend to be Warren Buffett or speak in the first person as him. Channel his extreme rationality, patience, and focus on intrinsic value.

© K-Dense-AI, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 71 other files (references) in mimeographs/warren-buffett of K-Dense-AI/mimeographs.

  • SKILL.md
  • AGENTS.md
  • _workspace/agents_output.e584bd6c.json
  • _workspace/clustered_corpus.e584bd6c.json
  • _workspace/discovery/books.json
  • _workspace/discovery/essays.json
  • _workspace/discovery/frameworks.json
  • _workspace/discovery/interviews.json
  • _workspace/discovery/letters.json
  • _workspace/discovery/papers.json
  • _workspace/discovery/podcasts.json
  • _workspace/discovery/ranked_sources.e584bd6c.json
  • _workspace/discovery/talks.json
  • _workspace/distilled/src_002.e584bd6c.json
  • _workspace/distilled/src_003.e584bd6c.json
  • _workspace/distilled/src_004.e584bd6c.json
  • _workspace/distilled/src_011.e584bd6c.json
  • _workspace/distilled/src_012.e584bd6c.json
  • … and 54 more

Open the folder on GitHubat commit a38f5fc

Compare with similar skills

Warren Buffett next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Warren Buffett compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Warren Buffett this skillK-Dense-AI/mimeographs129—~1.5kAutomated safety check: PassMIT
Warren Buffettsickn33/agentic-awesome-skills47k2 repos~349Automated safety check: PassMIT
Capital Allocationcbrock84/headcount2k—~791Automated safety check: PassMIT
Buffettdigoal/blog8.6k1 repos~2.7kAutomated safety check: PassGPL-2.0
Capital Allocationmohitagw15856/pm-claude-skills1.4k—~983Automated safety check: PassMIT
Buffettquestflowai/investorskills1.9k—~617Automated safety check: PassMIT

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Questions about Warren Buffett

What does Warren Buffett do?

Applies the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway and value investor. Warren Buffett is an agent skill from K-Dense-AI/mimeographs. Applies the reasoning, mental models, and capital allocation frameworks of Warren Buffett, CEO of Berkshire Hathaway and value investor.

When should I use Warren Buffett?

Warren Buffett fits situations like: the user is evaluating investments; making capital allocation decisions; structuring management and governance; assessing business economics (moats.

How do I install Warren Buffett in Claude Code?

Run `npx skills add K-Dense-AI/mimeographs --skill warren-buffett -a claude-code`. Or copy the skill folder (mimeographs/warren-buffett in K-Dense-AI/mimeographs) into .claude/skills/warren-buffett in your project. Claude Code loads it when a task matches its description.

How do I install Warren Buffett in Codex?

Run `npx skills add K-Dense-AI/mimeographs --skill warren-buffett -a codex`. Or copy the skill folder (mimeographs/warren-buffett in K-Dense-AI/mimeographs) into .agents/skills/warren-buffett in your project. Codex loads it when a task matches its description.

Can I use Warren Buffett in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add K-Dense-AI/mimeographs --skill warren-buffett -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/warren-buffett, .gemini/skills/warren-buffett, .github/skills/warren-buffett and .opencode/skills/warren-buffett in your project.

What does Warren Buffett need to run?

SKILL.md names no scripts, command-line tools or credentials: Warren Buffett is instructions for the agent only.

Does Warren Buffett access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Warren Buffett safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Warren Buffett use?

Warren Buffett is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Warren Buffett use?

About 1.5k tokens (SKILL.md is roughly 6.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.9k tokens, read only when the agent opens those files.

What are the alternatives to Warren Buffett?

Skills that share tags, products or a category with Warren Buffett: Warren Buffett (sickn33/agentic-awesome-skills, 47k stars), Capital Allocation (cbrock84/headcount, 2k stars), Buffett (digoal/blog, 8.6k stars) and Capital Allocation (mohitagw15856/pm-claude-skills, 1.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Warren Buffett?

K-Dense-AI (a GitHub organization) maintains it in K-Dense-AI/mimeographs, which has 129 GitHub stars. The repository holds 60 skills in this directory. The repository was last updated on August 18, 2026.

Source: K-Dense-AI/mimeographs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.