secrets-manager
A program that keeps passwords and keys so a person doesn't have to — and the good ones keep almost nothing themselves.
The rule the founder learned building keep (2026-06-12, filed in this-machine): be a thin door to a strong vault, never a new vault. This Mac already has a guarded vault — the macOS Keychain — so a secrets manager here should only open and close that door, because the only cryptography you can get wrong is the cryptography you didn't write. The shape generalizes: wrap the strong thing that exists before building a weak thing that's yours.