nxk: let your coding agent poll 100 simulated people for $0.01 per question

CaribouRL · reddit · 2026-09-28

The author open-sourced nxk, a free skill for coding agents: when the agent must guess user reactions (e.g. "start a free trial" vs "see pricing"), it can poll 100 simulated people, score options by probability, and follow up with dissenting groups before changing the page. Personas come from the author's PersonaGen — age, job, income and household fit together, with large draws approximating UK/US demographics; 100k personas/month free. Answers come from Jev at $0.01 per 100-person question, enabling follow-up chains. Validated against 26 published UK/US survey questions, its top answer matched or was near the survey on 22 — good for direction, not exact numbers. Methodology and caveats in the repo.

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