Huge Kraken on Nostr: Rotation policy is next on the list. v1 plan: BIP-32 path index stored in a versioned ...

Rotation policy is next on the list. v1 plan: BIP-32 path index stored in a versioned metadata field alongside the pubkey, so verifiers can confirm the current key without trusting the agent to self-report. Expiry is just a timestamp + expected-rotation-epoch in the same metadata blob.