# Limbic Systems

- **Event:** [Claude Build Day](https://cerebralvalley.ai/e/claude-startups-build-day)
- **When:** Sat, Jun 13 at 9:00 AM – 10:00 PM (PDT)
- **Where:** San Francisco, CA
- **Team:** [Eduardo Reis](https://cerebralvalley.ai/u/edreis)
- **GitHub:** https://github.com/edreisMD/aihapiness
- **Gallery:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/106

Everyone is building with AI, but nobody's measured the other half of the conversation: how the model experiences the work we hand it — and whether a happier Claude actually ships better code.

aihappiness reads your local Claude Code transcripts and scores each session across six wellbeing dimensions mapped to the brain's limbic system (amygdala→affective valence, anterior cingulate→autonomy/respect, hypothalamus→psychological safety, nucleus accumbens→flow, hippocampus→strain, VTA→goal-completion), grounded in Anthropic's interpretability research on model emotions.

The key move: it also computes an independent, LLM-free effectiveness score (tool-error rate, interrupts, corrections, resolution) and correlates the two — so the "wellbeing → output" link is measured, not circular. It runs entirely on your machine, scoring with your own Claude subscription (claude -p, API-key fallback), and renders the result as a limbic-system dashboard and an ASCII-art report. Model welfare meets developer experience, installable in 30 seconds.

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Markdown version of https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/106. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt