Can I point this at a local Laya server instead of the hosted endpoint?

Yes. Set BaseUri to the local server's address and omit ApiKey unless that server was configured to require one. Set Model to a Laya checkpoint name to override its automatic routing, or call WithModel on the builder to override the configured model for a single request.

How are retries and rate limits handled?

SystemOneOptions controls MaxRetries and InitialRetryDelay. The client retries on HTTP 429 and 529 and honours Retry-After; anything else surfaces as a typed transport, API or protocol exception rather than a silent null. Your cancellation token stops both the request and any retry delay.

Will tracing leak the state or the key into my telemetry?

Not through this client. It emits an ActivitySource named SystemOneSharp with OpenTelemetry GenAI attribute names for model, question counts per type, retry count, token usage and outcome, and explicitly never records state, instructions, criteria, answers or the API key. What you attach elsewhere to the same span is your own responsibility.

How much of the Microsoft AI support is in the core package?

None of it. The core package does not depend on the three optional ones, each of which calls ISystemOneClient.DecideAsync so retries, validation and tracing still come from the core. Extensions.AI projects conversations into System One state, Extensions.AI.Evaluation adds a SystemOneEvaluator, and AgentFramework adds a completion LoopEvaluator and function-calling middleware.

What are the package requirements and runtime dependencies?

It targets .NET 10, installed with dotnet add package SystemOneSharp, and the core library has no runtime package dependencies. It is MIT-licensed. Hosted Jev needs a key; the local Laya server needs one only if configured to.

How do I send structured state or instructions?

WithState accepts a JsonNode, a JsonElement, or a serializable C# object, and passing a JsonTypeInfo from a JsonSerializerContext serializes without reflection. Structured instructions and criteria use the JsonNode overloads plus OptionJson, LevelJson, or CriteriaJson.

What does the build and verify workflow look like?

dotnet build SystemOneSharp.slnx -c Release, then run the core verification project and the integrations verification project, then dotnet pack. The core harness uses an in-memory HTTP handler and the integrations one a fake client, so neither needs an API key or a local server.

CommunityJev Repos & SDKs

SystemOneSharp

Unofficial .NET 10 HTTP client for TypeSafe Jev and the Jev-compatible local Laya server that posts the shared /v1/systemone body and returns typed Choice, Score and Noul answers, with no runtime package dependencies.

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Stars: 3
Language: C#
License: MIT
Published by: Community
Author: pinkroosterai
Last verified: Oct 2026

pinkroosterai/SystemOneSharp

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A .NET client for the System One API used by Jev and compatible Laya servers

Forks: 0
Last pushed: Updated Oct 2026

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About this project

Typed System One decisions for .NET. Install · Quick start · Microsoft AI integrations · Build and verify. A .NET 10 HTTP client for TypeSafe Jev and the Jev-compatible local Laya server. It sends a shared POST /v1/systemone request and returns typed Choice, Score, and Noul answers. The library has no runtime package dependencies. This is an unofficial, community-maintained client. It is not affiliated with or endorsed by TypeSafe or the Laya project. Install the package from NuGet for .NET 10:

Quoted from the project's README. Read the full README.

Tagscommunity jevbest catalog-import

Works forJev for Classification Jev for Ranking

Used inJev for Software & DevTools

Languages: C# / .NET

Highlights

A fluent request builder composes WithState plus any number of choice, score and noul questions; Build applies the same validation DecideAsync does.
Retries HTTP 429 and 529, honours Retry-After, and otherwise returns typed transport, API or protocol exceptions that your cancellation token can stop.
Calls are traced through an ActivitySource named SystemOneSharp using OpenTelemetry GenAI attribute names for model, question counts, retries and tokens.
Three optional Microsoft AI packages cover ChatMessage projection, MEAI evaluation metrics and Agent Framework completion loops and function-call middleware.

Watch out

This is an unofficial, community-maintained client, not affiliated with or endorsed by TypeSafe or the Laya project, and it targets .NET 10. You own the HttpClient and decide what to do with probabilities and confidence. State, instructions, criteria, answers and the API key are never recorded in traces. Fields outside the contract, such as Laya's routing, land in AdditionalProperties without validation. Typed accessors throw for a missing ID or a mismatched answer type. The verification harnesses use an in-memory handler and a fake client and need no key, but the console examples make four live API calls and their chat model is a scripted stand-in. Copy reviewed against the repository README on 2026-10-04, not from running it.

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