product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a dialectical estimate that improves a single committed number by polling the inner crowd, make a first estimate, assume it is wrong and list why, read whether that pushes the answer too high or too low, make a second estimate from those changed assumptions, then mechanically average the two. Use when a hard…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Runs one of the three lightweight prioritization presets (Eisenhower urgent-important 2x2, MoSCoW Must/Should/Could/Wont bucketing, or Pareto vital-few cut) caveat-first. It leads with the fact that this is a bundle of three different operations stapled by the word "prioritization", not one move, and each is weakly…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces an ethical matrix, a grid that cross-references affected parties (rows, deliberately including voiceless ones such as future generations and the environment) against prima facie principles (columns of wellbeing, autonomy, fairness), specifying the option's impact in every cell and reading the result as a…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces an evidence/inference ledger by sorting the claims in a prompt, document, or proposed conclusion into evidence, inference, and assumption, attaching a confidence level to each inference and flagging anything uncited. Use when a recommendation must be trusted, or when you need to audit the reasoning behind a…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Evaluates competing actions under uncertainty by building a decision tree of choice and chance nodes, placing explicit probabilities on outcomes the decider does not control, rolling the tree back to an expected value per option, recommending the best-EV branch, and adding a what-flips-it note naming the probability…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Generates novel solution candidates by stating a problem's deep relational structure, mapping it to distant source domains (nature, other industries, games), and transferring the mechanism rather than surface features, then adapting. Use when near, obvious solutions are exhausted and you need genuinely original…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a Fermi decomposition worksheet that estimates an unknown numeric quantity by factoring it into a chain of order-of-magnitude sub-estimates, guessing each to within a band, then multiplying back to a point estimate plus a compounded low/high range, with an independence check and a dominant-uncertainty flag.…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Runs a Five Whys root-cause trace caveat-first. It leads with the weak evidence (Card 2017 found the single-chain method oversimplifies multi-causal problems), then forces the discipline a bare why-chain lacks, namely flagging at each step whether more than one cause could apply. Use only when Five Whys is asked for…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Generates a new problem frame from theme analysis of the broader context, an abductive standpoint stated as approach it as if it were Y that redefines what the problem is and reasons forward to native solution directions. Use when an open paradoxical problem keeps resisting solutions inside the frame it arrived in…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a prioritized, evidence-graded Thinking Plan that diagnoses which thinking frameworks a situation actually needs - the dominant cognitive job, a short sequence of the fewest fitting frameworks to apply (each with its evidence tier, expected artifact, and a ready-to-run prompt), and what not to use. Recommends…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a consequence map by tracing the first, second, and third order effects of a change or decision radiating outward from the center, surfacing ripples beyond the obvious and flagging the high-impact branches. Use when a decision has knock-on effects over time, or when first-order thinking is missing downstream…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces an iceberg that moves a problem down four levels of causation - from the visible event, to the pattern over time, to the underlying structures, to the mental models that hold them in place - pairing each level with the intervention it implies to find systemic causes and higher-leverage fixes. Use when a…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a negotiation preparation map that separates both sides' positions from their underlying interests, anchors the accept-or-walk decision on a named, valued best alternative inside the mapped zone of possible agreement, and invents options for mutual gain across differently-valued issues before dividing value…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Audits whether a stated confidence interval means what it claims by running an equivalent-bet indifference test on its width and scoring nominal confidence against the actual hit rate, emitting corrected intervals and a calibration scorecard. Use when a human-stated interval or confidence number drives a consequential…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces an issue tree that decomposes one big, ambiguous question top-down into a mutually-exclusive, collectively-exhaustive (MECE) set of smaller sub-questions, branch by branch, until the leaves are small enough to answer with data or judgment. Use when a question is too broad or multi-cause to answer as posed…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces an annotated reasoning trace that reconstructs how a conclusion was reached, from the observable data, to the data actually selected, to the meaning and assumptions added, then flags the riskiest leap and tests an alternative interpretation. Use when a conclusion feels certain but rests on interpretation, or…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Builds a simple mechanical scoring model - a few weighted predictive cues combined by a fixed formula and applied consistently - for a repeated predictive judgment, because consistent simple rules reliably match or beat holistic expert intuition. Use when the same kind of evaluative judgment recurs (screening…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a regret (opportunity-loss) matrix with the minimax pick and the binding worst-case state, choosing among options over un-probabilized states of nature. Use when a few discrete options face a few discrete uncontrollable states and no defensible probabilities exist. Not an expected-value tree (which needs…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a morphological field (a Zwicky box of independent parameters by their possible values) plus a cross-consistency-pruned set of internally consistent configurations. Use when a solution is genuinely a configuration - a choice on each of several semi-independent dimensions (product architecture, service bundle…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Converts a conditional-probability or base-rate question into natural frequencies over a concrete population (for example 9 of 1000) to compute the correct posterior and expose base-rate neglect, and refuses to proceed without real input rates. Use when interpreting a test result, screening signal, or any "given a…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a reversibility classification that triages a decision before any analysis - labeling it a reversible two-way door or a hard-to-reverse one-way door - and matches the deliberation and sign-off level to that verdict, so reversible calls are made fast and irreversible ones get real rigor. Use when it is unclear…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Produces a binary-vote comparison matrix (every pair judged A-beats-B), a derived ranking, and a consistency check, ordering options without any criteria axis or absolute scoring. Use when items must be ranked but no defensible scale or articulable criteria exist. Not a criteria-weighted option matrix and not a…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Evaluates a decision or idea through several deliberately separated lenses in turn (facts, upside, risks, intuition, alternatives, process) so that no single mode dominates, then synthesizes them into a balanced read, producing a multi-lens review. Use when a choice needs a rounded look, or when risk-aversion or…
product-on-purpose/thinking-framework-skills
Skill Claude CodeCodex
Generates a ranked risk register that stress-tests a planned decision by imagining it has already failed, surfacing the likely causes and pairing each with a mitigation, tripwire, and kill criterion. Use when about to commit to a launch, hire, investment, migration, or any risky, hard-to-reverse decision, or when you…