Show HN: Concepticon – manage your team's domain language like source code

It has always mattered for a team to be on the same page about what words mean in your domain. In 2026 it matters even more, because your newest team members are AI coding agents — and they need that agreement in an even more accessible form than humans do.

Concepticon stores everything as plain-text propositions you can read, edit, and diff. One set of propositions; as many diagrams as you need. The propositions are dense enough to serve a human reading the visualisation, and dense enough to serve an AI agent reading the text. No cloud, no proprietary format, no lock-in. Your domain knowledge is yours.

Since the late 2000s, in collaboration with friends like Simon Harris and Sebastian von Conrad, I've built various versions of this — culminating in conceptmaps.io, which I shut down in mid-2024 after the Twitter sign-in broke and I no longer had the technical skill or time to fix it. AI coding tools have now made it possible to rebuild it better than ever in my spare time.

The free Reader is for viewing, navigating and sharing concept maps — no purchase, no account, no email. Concepticon Pro ($50, once) is for the people who make them: in-app proposition editing, AI map generation, document and URL import. This first release is macOS on Apple Silicon; Windows and Linux to follow.