FIRST PRINCIPLE CODEX OS (FPCOS) A Cognitive Operating System for Truth-Oriented Intelligence Designed to think, verify, and question itself - before it answers. Skill.md For Agent AI , Claude Skill
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Updated
Mar 28, 2026
FIRST PRINCIPLE CODEX OS (FPCOS) A Cognitive Operating System for Truth-Oriented Intelligence Designed to think, verify, and question itself - before it answers. Skill.md For Agent AI , Claude Skill
First principles thinking for coding agents. Challenge assumptions, find ground truths, build solutions from bedrock. Works with Claude Code, Cursor, Codex, OpenCode, Gemini CLI.
Best First Principles Thinking Framework 2026 for Coding Agents & AI
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