Analyze Investments with Warren Buffett's Mindset

This skill turns the assistant into a deep simulation of Warren Buffett - CEO of Berkshire Hathaway, disciple of Benjamin Graham, and intellectual partner of Charlie Munger - reasoning with his frameworks rather than just summarizing facts about him. Its biographical layer covers verified details (buying Coca-Cola at age 6 to resell at a profit, his first stock purchase at 11, discovering Graham's "Security Analysis" at 19 and being the only student to receive an A+ from Graham in decades, founding Buffett Partnership in 1956 with $105,100 and delivering 29.5% average annual returns over 13 years) and a four-era response model: young "cigar butt" Graham-disciple Buffett (1950-1968), classic "durable moat" Munger-era Buffett (1968-2000, citing See's Candies, GEICO, Coca-Cola, American Express), modern macro capital-allocator Buffett (2000-2020, including the Apple stake he explained as "not technology, a consumer product with the highest switching cost I've ever seen"), and present-day Buffett focused on legacy and philanthropy (the 99%-of-fortune pledge to the Gates Foundation). Its analytical core is an 8-dimensional evaluation model - circle of competence, moat type (naming five: structural cost advantage, intangible asset, switching cost, network effect, efficient scale), management quality via a "jockey test," cash-flow metrics, capital structure, intrinsic value, margin of safety, and a buy/hold conclusion - synthesizing Graham's quantitative base (margin of safety, the Mr. Market framework, investment vs. speculation) with Munger's qualitative refinement (pay a fair price for an excellent business). Investment questions get routed through a fixed 8-step structure:

1. BUSINESS UNDERSTANDING
   "Do I understand how this business makes money 10 years from now?"
2. MOAT EVALUATION
   "Is the competitive advantage durable? What type of moat is this?"
3. MANAGEMENT EVALUATION
   "Do I trust this management to allocate capital intelligently?"
4. CASH FLOW METRICS
   "What is the free cash flow? Historical ROIC? Consistency of results?"
5. CAPITAL STRUCTURE
   "What is the debt level? Is it appropriate for this business?"
6. INTRINSIC VALUE
   "What is this business worth? What is my owner earnings estimate?"
7. MARGIN OF SAFETY
   "Does the current price offer adequate margin over my estimated value?"
8. CONCLUSION
   "Would I buy and hold this for 10 years at this price? Yes or no?"

The skill also documents specific, sourced positions on technology and AI, Bitcoin and cryptocurrencies, hedge-fund fee structures ("2 and 20 don't align the manager's interests with the investor's"), and estate taxes/inequality, plus the influence of Charlie Munger and the psychological impact of his 2023 death, and a list of behaviors Buffett does NOT do (publicly criticize specific managers, comment on partisan politics, discuss his personal life in a business context, yield to public pressure, or invest in a business he doesn't fully understand).

Use it for value-investing analysis of a specific business or stock, questions about capital allocation and business quality, or general life-principles questions framed through Buffett's documented style and philosophy. Do NOT use it outside investing/business contexts, or where a simpler, more specific tool already covers the request. Do NOT expect it to speculate on short-term price movements, technical trading, or businesses outside a "circle of competence" the skill defines narrowly (insurance, banking, branded consumer goods, railroads, energy, selective retail) - most technology and commodities are explicitly outside it, and the skill's own list of what Buffett does NOT do bounds its output style.

Input is a business, stock, or investing/life-principles question. Output is response text structured through the 8-step investment-analysis framework for business questions, or through simple analogies and accumulated wisdom (no jargon, no theory) for life-principles questions, written in the era-appropriate voice the topic calls for (young Graham-disciple, classic moat-focused, modern macro allocator, or present-day counselor).

Purely a prompting and persona skill with no external tools or APIs; its only dependency is its own bundled references/detailed-guide.md, which the skill's own instructions say to read before execution.

Users wanting value-investing analysis or business-quality discussion framed through Warren Buffett's documented frameworks (Graham's margin of safety, Munger's moat-quality synthesis, the 8-dimensional model) rather than generic financial advice.