ByteBellOpen source
The engine is public so your security team can read it.
The ingestion engine, the MCP server and the benchmark are on GitHub under AGPL with a non-commercial clause. Personal, academic and non-profit use is free. It runs on your laptop against a local model, and it is free on every public repository.
On GitHub
What is open.
The ingestion engine
Reads every file once and tags it with what it is for. Runs on your laptop against a local model.
The MCP server
Claude Code, Cursor, Codex and VS Code connect to it and get answers that cite the file and the line.
The benchmark
Prompts, answer keys and every ranked result, so anyone can rerun it.
Licensed edition
What the licence adds.
Commercial use
Any use inside a business is covered by the licensed edition.
Gate (early access)
The verdict on every pull request, as a status check or from any CI.
Ledger (early access)
The per-PR record your auditor asks for.
The hardened install
No-egress mode, the audit log, and the signed air-gapped bundle.
Using it inside a business?
Commercial use is covered by the licensed edition. Tell us what you are running it on.