What is olivere/systemone?

A small, standard-library-only Go library for typed AI decisions that supports TypeSafe's Jev HTTP API and the OpenAI Decisions API behind one question API.

How do typed questions work?

You define questions once, evaluate them together, and read results through the same typed handles, so application code does not need string keys or type assertions.

Run go get github.com/olivere/systemone. The README requires Go 1.27.2 or newer and says the library has no dependencies outside the standard library.

How do I run the Jev example?

With mise configured and TYPESAFE_API_KEY set, run mise exec -- go run ./examples/jev, or pass -text to try a different ticket. Each run makes one real TypeSafe API request.

Which model does the example use?

The default is jev-latest, and the -model flag selects another model version. The example prints three decisions from a default duplicate-charge ticket.

Does it require an API key?

Yes. The README says to set TYPESAFE_API_KEY in mise.toml and pass the key explicitly to the library; without it the live example cannot make its request.

Who maintains it and what is its status?

It belongs to olivere, is MIT-licensed, has 0 stars and 0 forks, and was created on 2026-09-21 and last pushed on 2026-10-12.

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systemone (Go library)

A small, standard-library-only Go library for typed AI decisions. It supports TypeSafe's Jev HTTP API and the OpenAI Decisions API, letting you declare questions once and read answers through the same typed handles.

See highlights Open github.com

Stars: 0
Language: Go
License: MIT
Reading time: 2 min
Published by: Community
Author: olivere
Last verified: Oct 2026

olivere/systemone

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Small, standard-library-only Go library for typed decisions with Jev and other System One models.

Forks: 0
Last pushed: Updated Oct 2026

Repo stats from the GitHub API, cached Oct 2026.

Tagscommunity github go sdk

Works forJev for Classification Jev for Routing

Used inJev for Software & DevTools

Languages: Go
Platforms: API
Capabilities: Open sourceRequires API key

Highlights

Defines questions once, evaluates them together and reads results through the same typed handles.
The jev package supports TypeSafe's HTTP API; the openai package supports the OpenAI Decisions API.
Requires Go 1.27.2 or newer and has no dependencies outside the standard library.
The live example makes one real TypeSafe request and prints three decisions; -model defaults to jev-latest.
MIT-licensed, 0 stars, created 2026-09-21 and last pushed 2026-10-12.

Quickstart

bash

go get github.com/olivere/systemone

Watch out

README reviewed 2026-10-17; the captured text ends right after the sample default-ticket output label, so the actual output, error handling and full credential setup are not visible. Metadata shows 0 stars; its examples make paid API calls.

Questions about this entry

Short answers drawn from the linked project or page.

From the Jev guides

Original write-ups on what this entry is for.

The Open Reimplementations: Local Models That Speak System One

Sep 22, 2026

Closed weights have not stopped the ecosystem from rebuilding the shape in the open. API-compatible servers, retrained heads on small models, and inference-time tricks that skip generation entirely.

Jev Repos & SDKs#open-models#research#local

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