claude

first-principles

A Claude Code plugin: the 5-phase first-principles methodology plus 15 namespaced skills — 8 companion-technique skills (Five Whys, pre-mortem, trade-off analysis, fishbone, inversion, second-order thinking, estimate, theoretical-limit), 5 focused-phase skills (identify-essence, challenge-assumptions, ground-truths, reason-upward, validate), the first-principles-analysis launcher, and the persona reader-view companion. Use when reasoning from ground truths rather than analogy or convention.

2 on GitHubby Christopher Davidsonv9.21.0MITupdated 30 days agoreasoning
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Plugin first-principles from marketplace first-principles-skill in chrisdavidson/first-principles-skill. Commands read from the repo's manifest — 30 days ago.

This plugin runs code on your machine — its hooks fire automatically on events like tool use. The exact commands are listed below; read them before installing.

What it installs

Skills (15)

  • challenge-assumptions

    Slash-only Phase 2 stub — classify and test every assumption before reasoning.

  • estimate

    Runs a focused estimate only — magnitude rebuild from units. Invoke via /estimate only.

  • first-principles-analysis

    Runs the full five-phase first-principles analysis. Slash-only.

  • fishbone

    Runs a focused fishbone only — breadth-first cause-category map. Invoke via /fishbone only.

  • five-whys

    Runs a focused 5-Whys only — root-cause drill on a symptom or a reduce-to-primitives irreducibility drill on a claim. Invoke via /five-whys only.

  • ground-truths

    Slash-only Phase 3 stub — compile GT-ID-anchored verified facts for derivation chains.

  • identify-essence

    Slash-only Phase 1 stub — expose core question by stripping framing artifacts.

  • inversion

    Runs a focused inversion only — enumerates failure preconditions. Invoke via /inversion only.

  • persona

    Writes a role-specific reader view of a delivered first-principles analysis to a sibling file, using only what the analysis already states; slash-only, never run automatically.

  • pre-mortem

    Runs a focused pre-mortem only — prospective-hindsight failure analysis. Invoke via /pre-mortem only.

  • reason-upward

    Slash-only Phase 4 stub — build derivation chains upward from named ground truths.

  • second-order

    Runs a focused second-order only — 2nd/3rd-order effects. Invoke via /second-order only.

  • theoretical-limit

    Strips conventions to the law-permitted ceiling. Invoke via /theoretical-limit only.

  • trade-off

    Runs a focused trade-off only — weighted-criteria scoring. Invoke via /trade-off only.

  • validate

    Slash-only Phase 5 stub — stress-test each derivation chain for weak links.

Subagents (1)

  • first-principles

    Runs a complete first-principles analysis end-to-end: decomposes the problem into verified ground truths, challenges every assumption, and reasons upward to a validated conclusion. Applies all eight companion techniques (5-Whys, fishbone, inversion, pre-mortem, trade-off, second-order thinking, esti

Hooks (1)

  • SubagentStop

    python3 "${CLAUDE_PLUGIN_ROOT}/hooks/delivery-guard.py"

View source on GitHub

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