s4h skills-for-humanity

Structured reasoning methodologies from history's most rigorous thinkers, packaged as Claude Code skills.

Each skill is a complete procedure: a defined problem type, a sequence of moves, a structured output. Not a concept to apply — a method to run.

Lineage: de Bono · Meadows · Altshuller · Minto · Goldratt · Tetlock · Klein · Mill · Kant · Aristotle · Noddings · Rawls · Sun Tzu · Clausewitz · Musashi · Nash · Axelrod · Vickrey · Shapley · Spence · Marshall · Coase · Ostrom · Granovetter · Barab%C3%A1si · Shannon · Norman · Lakoff · Grice · Kahneman · Tansley · Dawkins

Install

npx @human-avatar/skills-for-humanity

Run again to update. Restart Claude Code when done.

Use

/s4h

Describe your situation. Routes to the right methodology automatically. You don't need to know which skill fits — that's the point.

Every skill pauses before running: states its read, confirms what it's actually analysing, and asks how deep to go. Correct the framing at any point — the analysis follows the corrected read, not the original one.

Use cases

Decisions — /s4h-decision for structure, /s4h-decision-premortem-analysis to stress-test before committing, /s4h-constraint-hardness-testing to separate real obstacles from assumed ones.

Complex situations — /s4h-systems to map why something keeps producing the same outcome, /s4h-game-theory for the incentive structure underneath, /s4h-historical for the pattern it's an instance of.

Creative work — /s4h-creativity-brainstorm for multi-method exploration, /s4h-constraint-rule-inversion to make limits generative, /s4h-aesthetic-elegance-testing to find what's unnecessary.

Communication — /s4h-communication-objection-mapping to anticipate resistance, /s4h-narrative-tension-mapping to find what earns attention, /s4h-writing-rhetoric to audit what a piece is actually doing.

Ethics — /s4h-ethics-check for a fast multi-framework scan, /s4h-ethics-council for adversarial analysis, /s4h-identity-values-clarification to test against what you actually value.

Investigation — /s4h-investigation-triangulation for independent corroboration, /s4h-investigation-source-trace to trace a claim to its origin, /s4h-investigation-counter-hypothesis to pressure-test your explanation.

Think Sharper

/s4h-logic

• /s4h-logic — Entry point for the logic toolkit.
• /s4h-logic-argument-validation — Check whether an argument's premises actually support its conclusion, and identify logical fallacies.
• /s4h-logic-causality-mapping — Map causal relationships, trace dependencies, and reason about consequences before acting.
• /s4h-logic-check — A fast, comprehensive logic report on any argument, plan, or reasoning — validates premises, tests inference, detects fallacies, surfaces hidden assumptions, and produces a verdict.
• /s4h-logic-consistency-check — Surface internal contradictions, conflicting requirements, and edge cases that expose hidden conflicts in a document, spec, plan, design, or set of requirements.
• /s4h-logic-constraint-mapping — Map the full constraint landscape for a decision, design, or plan — distinguishing hard limits from soft preferences, surfacing hidden constraints, and finding conflicts between them.
• /s4h-logic-council — Run a reasoning problem, argument, plan, or decision through a council of 5 logical reasoning advisors who analyze it from distinct reasoning frameworks, peer-review each other, and synthesize a verdict on whether the reasoning holds.

/s4h-probability

• /s4h-probability — Entry point for the probability toolkit.
• /s4h-probability-base-rate-anchoring — Anchors estimates in historical base rates before adjusting for specific factors.
• /s4h-probability-confidence-calibration — Tests whether stated confidence levels match available evidence — catching overconfidence and underconfidence.
• /s4h-probability-expected-value-calculation — Calculates expected value to compare options under uncertainty.
• /s4h-probability-scenario-weighting — Assigns explicit probabilities to distinct scenarios before making a decision.

/s4h-decision

• /s4h-decision — Entry point for the decision toolkit.
• /s4h-decision-criteria-weighting — Runs a weighted multi-criteria analysis — making explicit what matters, how much, and how each option performs against it.
• /s4h-decision-option-mapping — Ensures all real options are visible before choosing — countering the false dichotomy that limits consideration to the first two options that came to mind.
• /s4h-decision-premortem-analysis — Imagines the decision has been made and failed — then diagnoses why.
• /s4h-decision-reversibility-analysis — Categorises a decision by reversibility and applies the appropriate level of process rigour.

/s4h-constraint

• /s4h-constraint — Entry point for the constraint toolkit.
• /s4h-constraint-hardness-testing — Tests whether a stated constraint is real — distinguishing genuine limits from assumptions, habits, or politics dressed as facts.
• /s4h-constraint-rule-inversion — Flips a constraint into a creative driver — uses the limit as the generative force rather than working around it.
• /s4h-constraint-scope-reduction — Finds the minimum that satisfies the actual requirement — stripping everything wanted but not needed.
• /s4h-constraint-workaround-mapping — Finds paths around a fixed constraint without removing it — routing around a hard limit to reach the same goal.

/s4h-game-theory

• /s4h-game-theory — Routes to the right game-theory skill for your strategic situation.
• /s4h-game-theory-auction — Analyses bidding strategy and auction design — how much to bid, how to avoid the winner's curse, and how to design revenue-maximising or efficient auctions.
• /s4h-game-theory-coalition — Analyses which coalitions form and how to divide gains fairly using cooperative game theory and the Shapley value.
• /s4h-game-theory-equilibrium — Finds the stable outcome of a strategic interaction — the point where no player can improve their result by changing their strategy alone.
• /s4h-game-theory-iterated — Analyses long-run r