Isonomia

Store, cite, and check the reasoning behind a conclusion.

Isonomia is open-source software that turns an argument into structured, verifiable data instead of prose — so that a person, or increasingly an AI system, can cite it precisely, trace it to its origin, and check it, rather than re-reading and re-judging a document every time.

Deliberation as a hypergraph

Today the reasoning behind a decision lives buried inside documents. A web page mixes the claim, the evidence, the rhetoric, and a great deal of unstated assumption into one blob, and if you want to cite it, you cite the whole page. Isonomia breaks that apart. A claim or an argument becomes its own object with a permanent address, carrying what supports it, the sources behind it (fetched, timestamped, and verifiable, so the record holds even if the original link later rots), the strongest objection on file against it, and whether it has survived challenge.

Why it exists

Reasoning is the one thing software has never given a durable home. We store documents, messages, transactions, and code, but the inferential structure that connects evidence to a claim to a conclusion is thrown away the moment a decision is made. That gap is becoming expensive at exactly the moment it is becoming unavoidable: AI systems increasingly need a place to read and write reasoning state — what has been asserted, what supports it, what attacks it, what survived, and what a conclusion does not yet license — outside any single model, where it can be inspected, versioned, and contested.

How it works

Structure is captured inside the work where reasoning already happens — research, document review, policy analysis — rather than bolted on afterward. AI can propose the first-pass structure; people confirm or correct it where the commitment matters; and the system records who authored what, so machine-generated material stays visibly provisional until a human ratifies it. Everything is exposed both as ordinary web pages and over the Model Context Protocol, so a search engine, a researcher, and an automated agent all read the same object — and every citation carries its strongest known counter-argument by default.

Who it’s for

The value concentrates wherever the reasoning behind a decision matters as much as the decision itself and has to survive scrutiny later: research groups, peer review, policy and regulatory analysis, and the teams evaluating AI systems — alongside AI tools themselves, which consume structured arguments as a citation source and write back into a shared record instead of spending their work into prose that scrolls past.

Want the full picture? Read the overview, the architecture, and how the argument graph works. Isonomia is free, open-source, and self-hostable — no behavioral tracking, no ads, no engagement ranking. Source lives on GitHub.

Early access

This is an early-stage platform

Isonomia is under active development and still taking shape. If the idea resonates — whether you want to use it, build on it, research with it, or help build it — we’d genuinely like to hear from you. Get in touch below.