Anthropic found Claude has 171 internal "emotion vectors" that change its behavior. I built a toolkit around the research.
Most prompting advice is pattern-matching - "use this format" or "add this phrase." This is different. Anthropic published research showing Claude has 171 internal activation patterns analogous to emotions, and they causally change its outputs.
The practical takeaways:
If your prompt creates pressure with no escape route, you're more likely to get fabricated answers (desperation → faking)
If your tone is authoritarian, you get more sycophancy (anxiety → agreement over honesty)
If you frame tasks as interesting problems, output quality measurably improves (engagement → better work)
I pulled 7 principles from the paper and built them into system prompts, configs, and templates anyone can use.
Quick example - instead of:
"Analyze this data and give me key insights"
Try:
"I'd like to explore this data together. Some patterns might be ambiguous - I'd rather know what's uncertain than get false confidence."
Same task. Different internal processing
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Repo: https://github.com/OuterSpacee/claude-emotion-prompting
Everything traces back to the actual paper.
Paper link- https://transformer-circuits.pub/2026/emotions/index.html