Browser-based RDF/ontology knowledge graph editor — load RDF from files, URLs or SPARQL endpoints; author nodes and edges on the canvas; run OWL-RL reasoning; apply multi-algorithm layout and clustering. AI-native via MCP tool surface and relay bridge. Fully client-side, no backend required.
Latest release v1.7.7 · 16 Oct 2026
2 files for Codex, OpenCode and Claude Code: ontosphere AGENTS.md, ontosphere CLAUDE.md — 3,803 tokens loaded in every session.
AGENTS.md A 3,506 tok CLAUDE.md A 297 tok These files are ThHanke/ontosphere's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.