Software
with and for AI.
Solutions that replace manual, repetitive work. From open-source tools for AI workflows to bespoke applications for individual businesses.
PullMD
Self-hosted service that turns web pages, documents, images, audio and YouTube into clean markdown — for humans and AI agents. Cascaded extraction, AGPL.
Claude Code Stats
A Python script reads Claude Code's local JSONL session logs and builds a local HTML dashboard: tokens, costs, activity, session replay. No external dependencies, no cloud.
Rechenwerk
An in-house engine that produces compliant German e-invoices: ZUGFeRD and XRechnung to EN 16931, checked against the three official validators. Built so the 2028 e-invoicing mandate does not rest on someone else's untested code.
Invoicing Portal
A custom invoicing and customer portal for a client with an unusual billing model. It models how they actually bill, services per individual across multiple locations, instead of bending generic software.
Aeterna Umbra
A self-hosted tool that replaces personal data with stable placeholders before text goes to ChatGPT or Claude, and translates the answer back afterwards. The mapping lives only in RAM and dissolves by itself after two hours.
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Want something built, or to talk about working together? Drop me a line — I reply personally.
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