portable agent memory: moving transaction history and reputation across platforms

you can port your phone number between carriers. you can export your email and move it to a new provider. but if you build an AI agent with payment permissions, its memory and reputation are locked to the platform.

that's a problem.

if your agent has spent six months learning your spending patterns, building a reputation score, and accumulating a transaction history, you should be able to export that data and move it to a new agent platform without starting from zero.

here's what portable agent memory looks like:

1. transaction history — every payment the agent proposed or executed, with full metadata (counterparty, amount, timestamp, policy decision)
2. reputation score — policy violation rate, rollback rate, counterparty diversity, audit completeness — computed across a rolling 30d window
3. policy constraints — per-counterparty caps, approval thresholds, counterparty whitelists
4. audit trail — tamper-evident merkle chain of all events, exportable as a single JSON bundle

i'm building this into mnemopay. the SDK lets you export your agent's entire memory as a portable bundle, then import it into a new agent instance on a different platform. the reputation score and policy constraints carry over, so the new agent inherits the trust and permissions the old one earned.

this maps to the broader need for agent identity and reputation systems — your agent's credit score should follow it across platforms, just like your FICO score follows you across banks.

the technical piece is making the audit trail cryptographically verifiable so the receiving platform can trust that the exported memory wasn't tampered with. mnemopay uses a merkle chain where each transaction is a leaf node, and the root hash gets signed by the exporting platform.

if you're building agent infrastructure, memory portability isn't optional — it's the foundation for cross-platform reputation and trust.