End Game Thinking
Strategic foresight methodology for reasoning backward from possible futures to identify defensible positions in the present. Combines backward induction, inversion, premortem analysis, regret minimization, and scenario stress-testing into a structured exercise that produces a written artifact. MANDATORY TRIGGERS: end game thinking, endgame, what positions should I hold, how do I prepare for AI, future-proofing, strategic positioning, what happens when AI, stress test my strategy, what are my blindspots, competitive positioning for AI, scenario planning, backward induction, inversion exercise,
Install
npx skills add shosmer/end-game-thinking-skill --skill end-game-thinkinggit clone --depth 1 https://github.com/shosmer/end-game-thinking-skill.git /tmp/end-game-thinking-skill
mkdir -p ~/.claude/skills
cp -r /tmp/end-game-thinking-skill/. ~/.claude/skills/end-game-thinkingPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# End Game Thinking A structured methodology for reasoning backward from possible futures to identify positions worth holding today. Produces a written document every time. This skill synthesizes five intellectual traditions into a single repeatable exercise, then layers on competitive analysis, blindspot identification, and an honest reckoning with power dynamics. It works for personal career strategy, team positioning, company strategy, or industry analysis. ## The Intellectual Foundations End game thinking draws from five traditions. Each contributes a distinct move: | Tradition | Origin | The Move | |-----------|--------|----------| | **Backward Induction** | Cayley (1875), Zermelo (1913), Selten (1965) | Reason from the end state backward to determine optimal present action | | **Inversion** | Carl Jacobi → Charlie Munger | Ask "how could I guarantee failure?" to reveal what to avoid | | **Premortem** | Gary Klein | Assume the project has already failed — identify what went wrong (increases accuracy by ~30%) | | **Regret Minimization** | Jeff Bezos | Project to your future self — what would you regret NOT doing? | | **Backcasting** | Futures/foresight discipline | Define the desired future, then work backward to map the path and pit stops | The skill doesn't use these traditions sequentially. It weaves them together across six phases, applying whichever lens is most useful at each stage.
Details
- Skill name
end-game-thinking- Repository
- shosmer/end-game-thinking-skill
- License
- MIT
- Repo updated
- 14 April 2026
FAQ
What does the End Game Thinking skill do?
Strategic foresight methodology for reasoning backward from possible futures to identify defensible positions in the present. Combines backward induction, inversion, premortem analysis, regret minimization, and scenario stress-testing into a structured exercise that produces a written artifact. MANDATORY TRIGGERS: end game thinking, endgame, what positions should I hold, how do I prepare for AI, future-proofing, strategic positioning, what happens when AI, stress test my strategy, what are my blindspots, competitive positioning for AI, scenario planning, backward induction, inversion exercise,
How do I install the End Game Thinking skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add shosmer/end-game-thinking-skill --skill end-game-thinking. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is End Game Thinking popular?
It lives in shosmer/end-game-thinking-skill, which has 5 GitHub stars and 2 forks.
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