FirstPrinciples
First principles analysis. USE WHEN first principles, fundamental, root cause, decompose. SkillSearch('firstprinciples') for docs.
npx skills add majiayu000/claude-skill-registry --skill firstprinciples-danielmiessler-personal-ai-infrastr-4 --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
## Customization **Before executing, check for user customizations at:** `~/.claude/skills/CORE/USER/SKILLCUSTOMIZATIONS/FirstPrinciples/` If this directory exists, load and apply any PREFERENCES.md, configurations, or resources found there. These override default behavior. If the directory does not exist, proceed with skill defaults. # FirstPrinciples Skill Foundational reasoning methodology based on Elon Musk's physics-based thinking framework. Deconstructs problems to fundamental truths rather than reasoning by analogy. ## Core Concept **Reasoning by Analogy** (default, often wrong): - "How did we solve something similar?" - "What do others do?" - Copies existing solutions with slight variations **Reasoning from First Principles** (this skill): - "What are the fundamental truths here?" - "What is this actually made of?" - Rebuilds solutions from irreducible facts ## When to Use - **Architects**: Challenge "is this actually a constraint or just how we've always done it?" - **Pentesters**: Identify actual attack surfaces vs. assumed security boundaries - **RedTeam**: Sharpen adversarial analysis by deconstructing assumptions - **Engineers**: When stuck, rebuild from fundamentals -
- Customization
- Core Concept
- When to Use
- Voice Notification
- Workflow Routing
- The 3-Step Framework
- Key Questions
- Deconstruction Questions
- Challenge Questions
- Reconstruction Questions
- Constraint Classification
- Integration Pattern
- Examples
- Example 1: Architecture Decision
curl -s -X POST http://localhost:8888/notify \
What does the FirstPrinciples skill do?
First principles analysis. USE WHEN first principles, fundamental, root cause, decompose. SkillSearch('firstprinciples') for docs.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill firstprinciples-danielmiessler-personal-ai-infrastr-4 --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.