sdk/

Package application is the handwritten Go contract for proto/cloudpath/v1/application.proto (Application Protocol v1).

Package driver is the handwritten Go contract for proto/cloudpath/v1/driver.proto (Driver Protocol v1).

Package status defines the handwritten RPC status type shared by the driver and application protocol packages.

Package driverkit 定义外部 Driver 插件所需的公共契约：Config / State / Event / Command / Device / Adapter 与 Descriptor/Capability 类型，以及进程内注册表。

Package sampleexternal 是一个「仓外风格」的参考 Driver 样例：只 import 公共 SDK （sdk/go/driverkit 与 sdk/go/model），不 import 任何 internal/*。

Package model 定义 CloudPath 的设备无关领域模型：Device / Entity / Capability / Observation / Event / Command / Descriptor，并负责对冻结契约 spec/descriptor.schema.json 与 spec/capability.schema.json 的校验。

Package pluginmain is the common executable entrypoint helper for CloudPath process plugins.

Package pluginruntime provides the production local socket transport that binds a plugin process to its host for one launch, plus the handshake and RPC bridges used by the A4 Plugin Host and SDK service layers.

Package rpc is a small, handwritten RPC framing layer for the in-process transport.

Package transport defines the transport abstraction every handwritten RPC protocol sits on.