Append only ledger design audit — Atom

Enables AI agents to keep append-only, hash-chained audit ledgers of their work — starting a ledger, appending steps, verifying each link and reporting the first broken line, and replaying entries in order — so users can confirm what an agent claims it did was never edited. Also replays game recordings through versioned deterministic kernels and reports whether their chain head is reproduced, not reproduced, or broken.

Enables auditing x402 payment logs against delivery logs to issue signed proof-of-delivery receipts and verify payer spend health.

Enables AI agents to independently audit a trading bot's exchange account read-only, cross-checking raw exchange positions and orders against bot beliefs to surface missing or undersized stop losses, ghost trades, duplicate or orphaned orders, and size mismatches, with a hash-sealed attestation record for disputes and post-mortems. It never places, edits, or cancels orders, and reports a critical failure rather than a false clean result when the exchange cannot be read.

An MCP server providing an append-only, hash-chained evidence ledger for agent actions, where every record is a tamper-evident receipt cryptographically bound to all prior records and persisted as human-readable JSONL local state. It exposes tools to append records, verify chain integrity (pinpointing tampering), query records by actor/action/target/time, and fetch ledger stats—with no update or delete capabilities by design.