C SDK

transit-client-c and transit-station-c separate raw signed operations from Station's typed handlers, state and durable calls. Shared Zig owns protocol and framework semantics; these packages own language types, codecs, scheduling and packaging.

Installation

Use C11 callers and the pinned Zig compiler on Linux x86_64. Build all artifacts from the same checkout using the source build instructions. Native artifacts require that build's Nix runtime closure. Other platforms and portable native distributions are not supplied.

Extract the local SDK and matching native archives into one prefix. Set PKG_CONFIG_PATH to its lib/pkgconfig directory and compile using pkg-config --cflags --libs transit-client-c or transit-station-c. The SDK uses its installed rpath and locates the native library beside itself.

Include transit/client.h or transit/station.h. C callers use owned handles, explicit destroy operations and bounded inline values. Generated symbols bind headers and libraries to the current contract definition; rebuild consumers with matching artifacts when that definition changes. The shared implementation uses C++17 internally; the public C interface remains C11.

Client and framework guides

• Raw client API and recovery
• Station API and handler ownership
• Caller semantics
• Complete application examples

Select credentials and the native profile explicitly. A locally compatible library does not establish current server capabilities or authorization. Retain the original canonical request after an unknown outcome; closing a handle or cancelling a host task does not undo accepted work.