zuraffa_agent_platform_interface
Method-channel implementation of the zuraffa_agent AgentPlatform
seam (spec 115): bridges the federated platform packages
(zuraffa_agent_android, zuraffa_agent_ios, zuraffa_agent_macos)
to the shared channel contract.
Host apps normally depend on the app-facing zuraffa_agent package
and register the federated adapter for their platform — this package
is the shared implementation those adapters ship through.