Oh

Ontology infrastructure, without the platform tax

open-source tools for agentic research

Oh is a local-first ontology kernel for agents that need durable knowledge, verifiable operation history, and a clean path from one SQLite file to synchronized research systems.

Install and startRead the specification
oh.ontology.v1 current
# local SQLite authority
$ oh init --db research.db

# pinned public contract
$ oh contract --db research.db

# replay integrity
$ oh verify --db research.db
SQLite authorityContent addressedReplaceable semantic viewsTurso-compatible sync

The kernel

Small enough to trust.
Complete enough to build on.

01

Local by default

Your contract, records, operation log, and keyword index live in a SQLite file you control. Semantic caches are rebuildable views; hosted inference and network sync remain explicit adapters.

02

Deterministic contracts

Canonical bytes, content-addressed records, append-only operations, and generation checks make every graph mutation inspectable and replayable.

03

Built for agents

A small SDK, an honest CLI, and a self-contained skill let coding agents inspect, write, verify, search, and synchronize the same graph.