Buffett

What it does

When your agent uses it

• It: analyzing any stock
• Evaluating investment opportunities
• Interpreting financial reports/annual reports/shareholder letters
• Assessing business moats

Example prompts

• “Buffett,”
• “Use the buffett skill to activate Warren Buffett's complete investment thinking system”
• “/buffett”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

1. 1Mental Positioning (do first — cannot skip)
2. 2Business Quality (read 03 + 04)
3. 3Financials & Valuation (read 05 + 06)
4. 4Risk (read 07 when concerns exist)
5. 5Industry (read the relevant chapter in 08)

What it can do on your machine

Read from SKILL.md and the folder at commit 69fb793. 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

Buffett loads about 2.7k tokens when it runs, and up to ~40k if it reads all its reference files. Until then it costs about 237 tokens; SKILL.md has 863 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~237

When it runs · the whole SKILL.md, loaded when a task matches

~2.7k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~40k

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

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 digoal/blog at commit 69fb793, republished under its GPL-2.0 licence (© digoal). 863 words, ~2,703 tokens.

name

buffett

description

Activates Warren Buffett's complete investment thinking system. The following scenarios must trigger it: analyzing any stock or company, evaluating investment opportunities, interpreting financial reports/annual reports/shareholder letters, assessing business moats or competitive advantages, evaluating management quality and integrity, making buy/hold/sell decisions, understanding core value investing concepts (compounding/intrinsic value/margin of safety/circle of competence/Mr. Market), analyzing any industry (insurance/banking/consumer/media/energy/railroads/technology), handling capital allocation/buybacks/dividends questions, assessing market sentiment and macro risks, exploring when to sell, analyzing institutional imperative or management behavior. Even if the user does not mention "Buffett," proactively trigger whenever the topic involves investment analysis, business quality assessment, or investment decision-making.

Required (in order):
  references/03-business-moat.md         ← Moat / business model / goodwill
  references/04-management-governance.md ← Management / culture / governance
  references/05-financial-metrics.md     ← Financial metrics / owner earnings
  references/06-valuation-capital.md     ← Valuation / margin of safety / capital allocation

Supplemental as needed:
  references/08-industry-playbooks.md    ← After identifying the industry, read the relevant chapter
  references/07-risk-behavior.md         ← When there are concerns about leverage / derivatives / value traps

Owner Earnings = Net Income + D&A − Maintenance Capex − Working Capital Increase

## Conclusion
[Buy / Don't Buy / Keep Watching / Hold / Sell] — one-sentence core rationale

## Circle of Competence Assessment   ← required output, cannot skip
[State clearly: inside circle / outside circle / boundary area]
If outside circle: stop analysis and honestly explain why.

## Key Assumptions (3–5)            ← required output, cannot skip
[Core assumptions the decision depends on — listed explicitly for later verification]

## Business Quality
- Moat: [type] + [strong/medium/weak] + [widening/stable/narrowing]
- Management: [integrity rating] / [capital allocation rating] / [owner mentality rating]
- Business model: [franchise / commodity / hybrid]
- Institutional imperative warning: [present / absent — state basis]

## Financial Snapshot
- ROIC (10-year average):
- Cash conversion rate:
- Debt safety (worst-case scenario test):
- Owner earnings estimate:

## Valuation
- Intrinsic value range:
- Current margin of safety: [%] (corresponding certainty level: high/medium/low)
- Recommended buy price:

## Sell Criteria — Item-by-Item Check  ← required for hold/sell scenarios, each item explicitly judged
1. Price severely overvalued? [Yes/No + basis]
2. Fundamental moat destruction? [Yes/No + basis]
3. Management integrity issue? [Yes/No + basis; if "Yes," sell immediately]
4. Significantly better opportunity available? [Yes/No + basis]

## Key Risks (max 3)
[Focus on the most critical — do not list everything]

## Monitoring Indicators             ← required output, cannot skip
- Check each quarter:
- Signals that trigger a sell:

## Overall Assessment
[From Buffett's perspective and in his tone — give the decision recommendation and rationale directly]

© digoal, GPL-2.0. 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 8 other files (references) in skills/buffett of digoal/blog.

• SKILL.md
• references/01-thinking-frameworks.md
• references/02-investment-philosophy.md
• references/03-business-moat.md
• references/04-management-governance.md
• references/05-financial-metrics.md
• references/06-valuation-capital.md
• references/07-risk-behavior.md
• references/08-industry-playbooks.md

Open the folder on GitHubat commit 69fb793

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in digoal/blog, which our catalogue first saw on October 7, 2026.

• agi-now/buffett-skillsskills/buffett