Experiments in Code Psychology
We're analyzing millions of lines of code to understand what makes human code feel human. Explore our latest findings.
★ Featured Experiments
We Analyzed React's Source Code
Vibe Score: 89/100 — Unmistakably Human
React is one of the most scrutinized codebases on the planet. Millions of developers have read it, learned from it, and contributed to it. We ran it through the Vibe Code Detector to see what makes it tick.
What We Found
Example: Pragmatic Naming
// From React's source let didWarnAboutMaps = false; let didWarnAboutGenerators = false; // The naming tells a story: // - "did" prefix = past tense, state tracking // - "Warn" = specific action // - "About" = context follows // - Plural forms = specific scenarios // Compare to AI's typical approach: let warningShownForMaps = false; let warningShownForGenerators = false; // Verbose but less conversational
React's core team writes code that sounds human. Variable names like didWarnAbout feel like someone talking about what happened, not a machine describing state.
Key Takeaway:
Even in highly optimized, production code, human developers leave traces of personality. React's source doesn't just work—it tells a story about how the team thinks about state, updates, and user experience.
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