VaultOS reached a functional MVP on Mac: a local-first vault where the entire database is encrypted with AES-256-GCM, the key is derived with Argon2id, and unlock can go through Touch ID.

What I like most: it runs on-device local AI, without a single byte leaving the machine. No cloud, no telemetry. 172 tests cover the crypto and data core. Privacy by architecture, not by promise.