The older name of @agent-cards/sdk, Agentcard's SDK. This package re-exports every entry of @agent-cards/sdk (., ./cdp, ./playwright, ./preflight) for one release, so an import of @agent-cards/checkout keeps working while you rename it. The two JSON files under ./preflight/ are not re-exported: read them from @agent-cards/sdk/preflight/catalog.json and @agent-cards/sdk/preflight/schemas.json.
// before
import { VaultClient } from '@agent-cards/checkout';
// after
import { Agentcard } from '@agent-cards/sdk';
VaultClient constructs the same client as Agentcard and stays for the same one release.