Computes the Author-Scoped Merkle Sub-Root Hash for a specific user’s claims.
It partitions the 128KB frame by the Author’s DID, strictly ignoring claims
authored by other actors in the Bilateral frame.
Uses zero-allocation iteration over the existing memory slice.
Stamp fiduciary metadata and refresh the XOR parity block before WAL commit.
principal_did_hash is embedded in context; agent identity in metadata low bits.
The Verification Gate
Validates an incoming 64-byte signature against the author’s Public Key (VerifyingKey).
Only validates the specific claims matching the author’s DID, ensuring Bilateral Integrity.