Changelog

0.2.0 (2026-10-12)

provider: :openai for OpenAI's Decisions API (POST /v1/decisions, default model gpt-6-luna, OPENAI_API_KEY). Requests and responses are translated to and from the System One shape by SystemOneClient.Wire.OpenAIDecisions, so questions and answer structs are the same as for every other provider. Score legends carry your own level text, as with TypeSafe.
SystemOneClient.Answer.Refusal for a question the model declines to answer; the other answers in the request are still returned.
Typespecs for the public API, including SystemOneClient.option/0, SystemOneClient.options/0, SystemOneClient.error/0 and SystemOneClient.Provider.name/0; checked with Dialyzer in CI.
Doctests on validate_questions/1, Answer.parse/1, Provider.resolve/1 and the OpenAI request encoder, and grouped modules in the docs.

SystemOneClient.Provider results carry a wire field (:system_one or :openai_decisions).
The Hex package links to this changelog.

SystemOneClient behaviour with evaluate/3, validate_questions/1, and a dispatcher that picks the implementation from opts[:client] or app env.
SystemOneClient.HTTP: Req-based client with retries on 429/529/502/503/504 and transport errors, Retry-After and retry-after-ms support, 2 s default receive timeout.
SystemOneClient.Provider: :typesafe, :cloudflare (Clef and Clef-flash, result envelope), :openrouter, :compatible (any /v1/systemone URL, e.g. CLM).
SystemOneClient.Answer.{Choice, Noul, Score} with full probability distributions and validation of non-numeric probabilities and non-map answer payloads.
SystemOneClient.Stub for offline tests.
Telemetry [:system_one_client, :request, *] without state, questions, or keys.