Backpack Viewer

See your knowledge graph. A web-based visualizer for Backpack ontologies with force-directed layout, interactive navigation, and live reload.

Quick start

Tell Claude:

"Show me my knowledge graph"

Or run it directly:

npx backpack-viewer

Opens http://localhost:5173. Click any ontology in the sidebar to visualize it.

Features

• Live reload: add knowledge via Claude and watch it appear in real time
• Pan and zoom: click-drag to pan, scroll to zoom
• Inspect: click any item to see its properties, connections, and metadata
• Edit: rename ontologies, edit node types and properties, add or remove items inline
• Search: filter ontologies by name in the sidebar

How it works

The viewer reads ontology data from the same local files that the MCP server writes to. Changes appear automatically, no refresh needed.

backpack-ontology (MCP) ──writes──> ~/.local/share/backpack/ontologies/
                                         │
backpack-viewer ──reads──────────────────┘

Reference

| Variable | Effect | |---|---| | PORT | Override the default port (default: 5173) | | XDG_DATA_HOME | Override data location (default: ~/.local/share) | | BACKPACK_DIR | Override data directory |

Support

Questions, feedback, or partnership inquiries: [email protected]

Privacy

See the Privacy Policy. The viewer itself collects no data.

License

Licensed under the Apache License, Version 2.0.