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Elixir SDK

Community Elixir TypeSafe SDK for Jev's system_one API, now superseded by the provider-neutral system_one_sdk.

LibraryproductionMIT
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Overview

typesafe_sdk is a community Elixir package for TypeSafe's System One API, bringing Jev's typed questions and probabilistic answers into Elixir and BEAM applications, with system_one calls and model listing. It is published on Hex with HexDocs documentation.

The repository now states that the project has moved: version 0.4.1 is the final release and new projects should use system_one_sdk, the provider-neutral successor that carries the semantic question API, prepared evaluations, typed answers, batching, telemetry, runtime controls, OTP integration, testing support and decision tooling. TypeSafe-specific authentication and wire operations moved to typesafe_api_sdk, which system_one_sdk uses as a built-in provider. Historical implementation details, guides, examples and release history remain in the original repository for reference, and the package is MIT licensed. Existing users can stay on 0.4.1.

What the decision model decides

TypeQuestionAnswers
ChoiceTyped Choice, Score or Noul questions sent via system_one(inferred)—

How it works

  1. Add the package from Hex (or migrate to system_one_sdk)
  2. Configure the TypeSafe key
  3. Call system_one with state and questions
  4. Handle typed answers in Elixir

Strengths

  • Idiomatic Elixir access to Jev
  • Successor adds OTP integration and telemetry

Caveats

  • Final release; superseded by system_one_sdk

Getting started

For new projects use system_one_sdk (github.com/nshkrdotcom/system_one_sdk); typesafe_sdk 0.4.1 remains on Hex for existing users.

At a glance

Type
Library
Status
production
Language
Elixir
Runtime
BEAM library
Has code
yes
License
MIT

Use cases and integrations

How curated lists describe it

  • Community Hex package [`typesafe_sdk`](https://hex.pm/packages/typesafe_sdk) for `system_one` and model listing. Docs: [HexDocs](https://hexdocs.pm/typesafe_sdk).

    AnotiaWang/awesome-decision-models

  • An Elixir TypeSafe SDK that brings Jev’s typed questions and probabilistic answers into Elixir applications.

    logicrw/awesome-jev-projects

  • An idiomatic, type-safe Elixir port of the official TypeScript AI SDK (ai / ai-sdk) providing unified LLM integrations, streaming text and structured outputs, tool calling, and agentic workflows. Jev is their current flagship model and is the first System One model.

    hellogumbo/awesome-jev

  • Elixir SDK for the System One API.

    MrJev/awesome-jev

Frequently asked questions

Should I use typesafe_sdk?

Not for new projects; use system_one_sdk instead.

Where does TypeSafe-specific code live now?

In typesafe_api_sdk, used by system_one_sdk as a built-in provider.

Is it official?

No, it is a community package.

Related projects

  • ai

    Hack Club's lightweight LLM proxy, listed for adding a Jev forwarding endpoint behind its auth, limits and usage logging.

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  • Ax

    Ax, a DSPy-style multi-language LLM framework, listed with a native TypeSafe provider for Boolean, Choice, Score and raw Jev questions.

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  • Effect

    Effect TypeScript library whose @effect/ai-typesafe package maps classify, probability and rating operations to Jev questions.

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  • instructor-php

    PHP monorepo whose Polyglot module adds a TypeSafe driver for typed Noul, Choice and Score decisions alongside LLM inference.

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  • jev-mcp (freepik-company)

    Go MCP server giving any client typed Jev decisions via OpenRouter or TypeSafe, with validated answers and no paid retries.

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  • llm-typesafe

    Simon Willison's LLM plugin that adds Jev as a model for yes/no, choice and score questions from the command line.

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