Plain-language writing on organizational second brains, attestable memory, and the AI operating systems built around them — from a team that runs them in production, not from the sidelines. Free, no gate, no email wall.
The canonical essay
The second-brain wave solved remembering. Organizations need the half nobody built: proof — a working definition of attestable memory and the governed action chain.
Open specification
The receipt wire format and verification procedure — canonical JSON, hash-chaining, Ed25519 — with MIT conformance vectors and a reference verifier you can run offline.
Feel it instead
A working second brain on a synthetic health plan — cited answers, sealed receipts you can verify offline. No signup, no gate.
In the queue