Crate mnemo_deal 

v0.4.0 (P1-5) — agent-on-agent deal ledger.

Anthropic Project Deal (announced 2026-04-25) opens up agent-on-agent commerce: one agent contracts another to perform a task and the buyer’s host needs a tamper-evident record of the agreed terms + completion. This crate ships the substrate: a chained-HMAC log of DealEnvelopes, each one signed in line with the existing memory-provenance chain so audit-log export emits one continuous ledger.

Three pieces:

1. envelope::DealEnvelope — the minimal contract shape (who, what, when, prev_hash, hmac).
2. ledger::DealLedger trait + InMemoryDealLedger impl — append-only log with replay over an offset range.
3. dispute::verify_chain + dispute::DisputeReport — walks the chain, finds the first divergence between expected and observed hashes, and pinpoints the offset that broke.

Re-exports

pub use discovery::AgentAdvertisement;

pub use discovery::DealCapability;

pub use discovery::Ed25519PubBytes;

pub use dispute::DisputeReport;

pub use dispute::verify_chain;

pub use envelope::AgentId;

pub use envelope::DealEnvelope;

pub use envelope::EnvelopeError;

pub use ledger::DealLedger;

pub use ledger::InMemoryDealLedger;

pub use ledger::LedgerError;

pub use ledger::LedgerOffset;

pub use reputation::ReputationScore;

pub use reputation::compute_reputation;

Modules

discovery

Counterparty discovery (v0.4.1 P1-5).

dispute

Chain-verification + dispute reporting (v0.4.0 P1-5).

envelope

Deal envelope shape (v0.4.0 P1-5).

ledger

Append-only deal ledger (v0.4.0 P1-5).

reputation

Advisory reputation score (v0.4.1 P1-5).