Interface A2AMountOptions

URL-path prefix for the JSON-RPC endpoint. Defaults to the pathname of the agent card's url field (so url: 'https://host/a2a' mounts JSON-RPC at /a2a). Override to mount under a different path.

When true (default), also mounts the agent card at the origin root (/.well-known/agent-card.json) so simple discovery probes targeting the host itself find the card. Some deployments disable this when an upstream proxy owns origin-root routes — set false to mount only at {basePath}/.well-known/agent-card.json.