Decision Model SDK Rust

It is a port of the official Python SDK at a pinned commit, with intentional deviations documented separately. Question sets are validated and serialized once into a reusable prepared form, and unknown shapes go through an explicitly checked raw question type.

None. There is no default base URL or model, so the key is sent only to the vendor whose endpoint you configure, including via environment variables. The adapter crate separately targets non-decision chat models.

Yes. Every request can go through your own tower service instead of the built-in hyper and rustls transport, which also controls root certificates and HTTP version selection. Disabling the feature removes that stack.

The SDK writes the key into no Debug, Display, or error output of its own and redacts secret header values in log events. Request-body encoding is measured at one allocation with a public performance ledger.

Rust 1.98 minimum on edition 2024, and a Tokio runtime with the time driver enabled, because every attempt has a deadline, retries sleep between attempts and HTTP/2 keep-alive pings run on a timer; Tokio panics when a timer is created on a runtime without it. #[tokio::main] and Builder::enable_all() or enable_time() enable it. Install with cargo add decision-model-sdk plus tokio.

Either. The Questions builder chains typed primitives such as .noul, .choice and .score and then .prepare(), which validates and serializes the set once into a PreparedQuestions you reuse across calls. Alternatively #[derive(QuestionSet)] declares the questions as a struct serialized at compile time, so the response decodes straight into the struct's fields; it ships behind the default-on macros feature.

One. Over https every request of a client shares a single multiplexed HTTP/2 connection, and the README's measurement is that 64 concurrent cold calls open exactly one. Under HttpVersion::Http2Only the connect runs in a task spawned on the runtime of the call that starts it, so it makes progress only while that runtime is driven.