Independent software · open infrastructure

Systems for care, knowledge, and agency.

I am a medical doctor who builds practical software around difficult constraints: clinical safety, evidence, privacy, resilience, and trustworthy AI.

Explore the work
Abstract topographic landscape connected by fine paths and clustered points

Selected work

Ten projects, one through-line.

Technology should remain useful when conditions are imperfect—and legible when the stakes are high.

01 Health infrastructure

Cairn

An offline-first, vendor-independent electronic health record built to keep working through outages.

cairn-ehr.org
02 Open drug knowledge

DrugRef

An open, vendor-independent drug-information service for EHRs, pharmacy systems, and applications.

drugref.org
03 Biomedical evidence

BM Librarian

A multi-agent system for biomedical literature research, citation checking, and evidence synthesis.

bmlibrarian.org
04 iPhone & iPad

Medical Fact Checker

A native app for checking health claims against biomedical literature with the help of AI.

View on the App Store
05 Trustworthy AI

Kastellan

A personal autonomous agent designed from the ground up around mechanical and semantic boundaries.

kastellan.dev
06 Private data

Localmail

A read-only local archive for IMAP accounts, built for private search and bounded agent access.

mylocalmail.org
07 Private AI

Bottie

A local-first desktop AI companion with durable memory, visible context, and native security boundaries.

bottie.org
08 Learning

The Primer

A voice-first, Socratic AI learning companion for children, designed to run fully offline.

primer-ai.org
09 Collaborative intelligence

Consensus

A collaborative intelligence platform where people and AI models use structured analytical methods to test evidence, disagreement, and conclusions.

consensus-ai.org
10 Popular science

The Inhabited Body

A two-volume exploration of the human microbiome and the organisms that help shape our health.

book.inhabitedbody.com