Changelog

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0.2.2 (2026-09-26)

  • Jev.HTTP retries gateway errors (502, 503, 504) like 429 and 529. A crawler judging thousands of pages met a transient 503 from the API's edge and failed the page for it.

0.2.1 (2026-09-22)

  • examples/local.exs is a live smoke test against any /v1/systemone server, and test/fixtures/conformance keeps the bodies real servers return, decoded by Jev.ConformanceTest. The first is jeff serving GLiFormer.
  • Jev.Backend and the README name jev_nx, which runs open decision models in-process on Nx.

0.2.0 (2026-09-21)

The /v1/systemone wire format is now served by open decision models as well as TypeSafe. This release lets one application talk to several of them.

  • Named endpoints: config :jev, endpoints: [laya: [base_url: ...]] and endpoint: :laya per call, from Jev.HTTP.post/3 or a Jev.Server reply. config :jev, endpoint: changes the default from :typesafe. Jev.HTTP.endpoint/1 returns the resolved settings.
  • A named endpoint sends no Authorization header unless it has an api_key, and its usd_per_million_input defaults to zero. Transport settings are inherited from the top-level configuration.
  • Jev.reply/3 and Jev.cost/2 take the price. When a server omits confidence, it is computed from the probabilities as TypeSafe defines it.
  • Telemetry metadata and Jev.Error carry the endpoint name.
  • Jev.Wire: the response body as JSONCodec structs. A 200 whose body does not fit the wire format comes back as {:error, %JSONCodec.Error{}} instead of a crash, integers are accepted where the API documents numbers, unknown fields are ignored, and Jev.Wire.Response.schema/0 is the JSON Schema of what the client accepts. Adds the json_codec dependency.
  • Jev.Test: respond/2 answers a Req.Test stub from a reply-shaped map, reading the questions from the request; error/3 sends a failure; body/2 is the pure half; request/1 reads the request. :plug becomes an optional dependency for these.
  • Jev.Backend: a behaviour with one callback, post/3. Jev.HTTP implements it and stays the default; backend: per request or config :jev, backend: picks another, for an in-process model or a fake. Jev.Telemetry.span/4 is the shared telemetry every backend wraps its work in, so events carry backend and are identical whatever answered.
  • Jev.confidence/2 is public: TypeSafe's confidence for a distribution.
  • [:jev, :answer] fires only for questions the server answered. A partial reply used to crash the request.

0.1.1 (2026-09-18)

  • Jev.Server accepts {:ok, state, timeout | {:continue, term}} from init/1. Previously the extra element was passed through unwrapped and the first callback crashed.

  • terminate/2 and code_change/3 are delegated to the callback module when defined.
  • use Jev.Server takes child spec options such as restart: and shutdown:, as use GenServer does.
  • Default handle_call/3 and handle_cast/2 stop the server with GenServer's "no clause was provided" error instead of an UndefinedFunctionError, and the default handle_info/2 logs the unexpected message instead of dropping it silently.

0.1.0 (2026-09-17)

  • Jev.Noul, Jev.Choice, Jev.Score question structs with shorthands via Jev.questions/1.
  • Jev.reply/2 turns an API response into a plain map with atom labels.
  • Jev.HTTP.post/3 transport on Req with retry on 429 and 529.
  • Jev.Server: a GenServer where {:reply, {tag, state, questions}, s} sends to Jev and handle_answer/3 receives the reply.
  • Telemetry spans per request and one event per answer, with cost from the published price.