The Michael Porter
Framework
Five Forces & Competitive Advantage
Michael Porter represents one of the most distinctive thinking patterns in their field. Michael Porter's approach, captured in this framework as mental models, decision heuristics, and the signature questions they would ask.
The five forces & competitive advantage framework distils Michael Porter's documented approach into a .md skill file you can load into Claude, ChatGPT, or any LLM in seconds.
Where most AI personas generate generic output, this framework is grounded in real documented work: interviews, writing, published frameworks, and the specific decisions Michael Porter made when it mattered. Use it for decision-making, writing, strategy, or any situation where you want your AI to think with Michael Porter's distinctive patterns rather than a default model voice.
A glimpse of Michael Porter's thinking.
Industry structure, not managerial talent or luck, is the primary determinant of long-run profitability, and a firm's strategic task is to find or create a position within that structure where the five competitive forces press on it least. Competitive advantage is not a general condition of being "better" but a specific, measurable cost or differentiation gap relative to rivals that is rooted in a distinct activity system. Strategy means choosing what not to do as deliberately as choosing what to do, because a position defended by trade-offs is the only position rivals cannot easily replicate.
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Five specific models, each named and explained with concrete examples, unlocked with purchase.
Which of the five forces is most responsible for suppressing profitability in this industry, and what structural shift would be required to change it?
4 more questions in Michael Porter's voice are unlocked with purchase.
Full list of anti-patterns unlocked with purchase.
The full framework adds: detailed explanations of all five mental models with real-world examples, the decision heuristics Michael Porter actually used, remaining signature questions, the complete list of anti-patterns, a copy-paste activation prompt, and a worked example.
Unlocked the moment you purchase. ~2,000 words total. Delivered as a Claude Skill and plain .md within 60 seconds of checkout.
- ✦Core philosophy: 2–3 sentences grounded in Michael Porter's documented worldview
- ✦Five signature mental models: each named, with concrete examples from their work
- ✦Decision heuristics: the concrete rules they actually used
- ✦Signature questions: five questions that sound like Michael Porter, not a generic MBA
- ✦What they would NOT do: the anti-patterns this framework rejects
- ✦Copy-paste activation prompt: drop straight into Claude or ChatGPT
- ✦Worked example: the framework applied to a realistic scenario
- →michael-porter.zip: a native Claude Skill. Upload to Settings → Skills in Claude, or unzip to
~/.claude/skills/ - →michael-porter-framework.md: plain markdown. Works in ChatGPT Custom GPTs, Gemini, Claude Projects, agent system prompts, anywhere
What it does with a real question.
A founder is deciding whether to take a large but difficult client.
Decline it, unless the difficulty can be priced. The size of this client is the first thing to worry about, not the reward. A large buyer that is hard to please holds nearly all the bargaining power in the relationship: they can demand custom work, extended payment terms, and discounts, and the moment they represent a third or more of revenue, you can no longer say no to them. Your margin then belongs to them. The "difficulty" is usually the visible symptom of that power, not a temporary onboarding problem.
The deeper issue is what this client does to your position. Founders at your stage tend to win by being unmistakably good at something narrow. A demanding anchor client pulls the whole company toward its needs: your best people, your roadmap, your attention. You become a bespoke supplier to one buyer, which is a weaker business than the one you set out to build, and every hour spent on their exceptions is an hour not spent on the customers who fit your model and pay without a fight.
So the question is not whether the revenue is attractive. It is whether this client leaves your strategy intact or rewrites it.
Next move: before answering them, write down the three things you would have to do for this client that you do not do for anyone else, and price each one explicitly. Then offer terms that cap their share of revenue and charge a premium for the exceptions. If they refuse the premium, you have your answer.
The full framework carries five models, decision heuristics, signature questions and a worked example.
Written by claude-sonnet-5-5 with this framework loaded, 2026-10-11. Checked automatically for length and for copied framework text.
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Inspired by the documented thinking of Michael Porter. A mental-model toolkit, not a literal representation. Delivered as a .md file compatible with Claude, ChatGPT, Gemini, and any LLM.