Own the proof of how you use AI.
A private second brain that runs on your machine — and keeps a signed record of everything it touches.
You already use AI every day. Know Messenger, Personal, gives you a chat interface over your own vault of notes and documents, running locally. Every time the assistant reads or edits a file, that action is signed and hash-chained into an activity ledger that lives on your machine. You can open the diff of any change, verify the whole chain, and export a receipt you (or anyone) can check independently. Nothing leaves your Mac unless you choose to send it.
Your Mac, your vault
Live todayThe agent, your files, and the ledger all stay local. Know Messenger orchestrates; it doesn't take custody.
Runs on a local agent service + local Token Holder
A signed activity ledger
Live todayEvery read and edit is written to a hash-chained, Ed25519-signed ledger. See exactly what the AI touched, when, and the exact diff.
Receipts you can verify offline
Live todayExport any session as a receipt and check it with a zero-dependency script — no network, no account, no trust required.
Resumable local sessions
Live todayYour work and its signed ledger persist on your machine; pick back up where you left off.
The verifiability claim is always one click from a way to check it — no account, no trust required.