Module runtime 

Runtime helpers shared by generated REST clients.

Gated behind the runtime-client feature so SDK crates can re-export the contract types without pulling in toolkit-http / tokio transitively.

Why a submodule, not its own crate

The runtime-client feature already provides the same isolation as a crate boundary would — IR-only consumers don’t compile or link any of the HTTP/SSE/retry plumbing. Splitting into a separate toolkit-contract-runtime crate would add Cargo / CI ceremony without changing what gets compiled in either configuration. The split is only warranted if a hand-written client wants to consume the runtime standalone (without toolkit-contract’s IR + macros). Until that consumer exists, YAGNI.

Modules

canonical

Conversion from TransportError into toolkit_canonical_errors::CanonicalError.

client

Per-call helpers used by the generated REST client.

config

Client and retry configuration consumed by generated REST clients.

http

HTTP helpers shared by the generated REST client codegen.

resolving

Directory-resolving REST transport.

retry

Bounded exponential-backoff retry helper used by generated clients.

sse

Server-Sent Events (SSE) parser used by streaming clients.

transport_error

TransportError — uniform transport-layer error surfaced by generated REST clients.