I am Jonas and
this is my website.

I write about roleplaying games, game design, AI, and sometimes rationality.

This page hosts my projects, essays, and occasional thoughts on other topics that catch my interest.

I work at PlayInsight Studios and help run Pro Ludens.

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Ask the Archives: AI Rules Lookup for AD&D 2E

Building an AI agent that answers AD&D 2E rules questions by searching the actual books — not by guessing from training data. Architecture notes on embedding search, Claude Sonnet tool use, and making AI trustworthy for reference work.

ai claude-code web-dev