Ontology

A typed knowledge graph for giving Claude persistent memory across conversations. You create entities (Person, Project, Task, Event, Document) with properties and relations, and everything validates against a schema before committing. Good for when you need Claude to remember context between sessions, link related information, or share state across different skills. It's append-only JSONL by default, upgradeable to SQLite when things get complex. The constraint system is solid with cardinality rules, acyclic checks for dependencies, and forbidden properties to keep secrets out of the graph. Over 60 tests and both a Python API and CLI. Think of it as a structured alternative to dumping everything in markdown files.

Install to Claude Code

npx -y skills add hiveminderbot/ontology --skill ontology --agent claude-code