Updated 2mo ago
by ElmatadorZ
FirstPrincipleCodex-OS-Skill
Reduce hallucinations through first-principles reasoning, verification, self-critique, and explicit uncertainty for AI agents.
42 GitHub stars (42)
+1 in 16 days
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- 1 skill (1 skills found in its SKILL.md files)
- 6 forks (6 forks)
- 2mo ago last update (Last updated 2mo ago)
Install
Skills CLI
npx skills add ElmatadorZ/FirstPrincipleCodex-OS-Skill
Asks which agents to install it for. Add -g to install it for every project.
Claude Code
git clone https://github.com/ElmatadorZ/FirstPrincipleCodex-OS-Skillcp -r "FirstPrincipleCodex-OS-Skill" ~/.claude/skills/FirstPrincipleCodex-OS-Skill
Copies the first-principle-codex-os skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project).
Plugin
/plugin marketplace add ElmatadorZ/FirstPrincipleCodex-OS-Skill
Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.
Skills can run code on your machine — read the SKILL.md first.
What it does
In the author's own words, from each skill's SKILL.md.
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first-principle-codex-os
FIRST PRINCIPLE CODEX OS (FPCOS) — Anti-hallucination Cognitive Base Layer for Claude Skills. ALWAYS trigger — do NOT skip — for: claims, analysis, system design, recommendations, research synthesis, problem-solving, decision-making, coding architecture, financial analysis, scientific reasoning, philosophical inquiry, or ANY multi-step task where hallucination risk is non-trivial. BASE LAYER: run…
SKILL.md on GitHub (opens in a new tab)
No skill matches that filter.
Review before you install
A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.
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