Ports & edges
The economy is the system of record; everything it talks to is a port you supply an adapter for.
Signer
The signing port: sign and verify with rotating keys, backing the checkpoint that attests the ledger is intact.
Processor
The payout processor port that pays sellers, plus the provider adapters that satisfy it.
Rates
The rates port supplying the fixed CREDIT↔USD buy, par, and payout rates.
Pricing
The pricing capability: a fee policy that splits a sale into recipient legs and platform revenue.
Storage & messaging
The storage and messaging ports — the ledger and sub-stores, plus the dispatcher, cache, and outbox/inbox — and their adapters.
Scope & non-goals
What economy-lab deliberately does not do: no payment provider, no event consumer; the host supplies those edges.