laurentkempe/TypeSafeJevPlayground
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TypeSafe Jev Playground - idiomatic .NET port of typesafe-ai/typesafe-sdk-js v0.6.0
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- Updated Oct 2026
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CommunityJev Demos & Experiments
TypeSafeJevPlayground
Unofficial .NET port of the JavaScript SDK covering SystemOne noul, choice and score questions with env-based config, retries and typed errors.
- Stars
- 9
- Language
- C#
- Published by
- Community
- Author
- laurentkempe
- Last verified
- Oct 2026
About this project
An idiomatic .NET port of typesafe-ai/typesafe-sdk-js v0.6.0. The library targets net11.0, uses C# 15 and System.Text.Json, and has no runtime package dependencies. "TypeSafe's Jev AI Model in .NET: A Community SDK for Structured AI Output in C#" "Building a TypeSafe's Jev MCP server with .NET" The upstream JavaScript call is client.systemOne({ state, questions }). Its .NET equivalent uses SystemOneRequest:
Quoted from the project's README. Read the full README.
Works forJev for Classification
Used inJev for Software & DevTools
- Languages
- C# / .NET
Highlights
- Targets net11.0 with C# 15 and System.Text.Json and no runtime dependencies.
- Supports noul, choice and score questions with validation and extra JSON fields.
- Resolves config from options then env vars with bounded retry and timeout policy.
- Ships a runnable console sample mapping every SDK error to a distinct exit code.
Watch out
Unofficial community port explicitly marked vibe-coded and unsupported by TypeSafe; verify behavior before production use. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
It is an idiomatic port of typesafe-sdk-js with SystemOneRequest, typed answers, cancellation tokens and a JS-to-NET error mapping, with no runtime package dependencies.
Options resolve from explicit value, then nonblank env vars like TYPESAFE_API_KEY and TYPESAFE_BASE_URL, then defaults such as jev-latest and 10 seconds.
Defaults are two retries with exponential backoff, jitter, Retry-After support and coverage for 408, 429, 500-599 plus connection failures and timeouts.
An injected HttpClient is never disposed by the client, WithResponse variants return buffered content with request IDs, and secrets are redacted in logs.
It targets net11.0, uses C# 15 and System.Text.Json, and has no runtime package dependencies; it is an idiomatic port of typesafe-sdk-js v0.6.0 and is not supported by TypeSafe.
TypeSafe maps to TypeSafeClient, client.systemOne to SystemOneAsync, client.models.list to ModelsAsync, and APIPromise.withResponse to *WithResponseAsync returning an ApiResponse<T>.
typesafe_noul, typesafe_choice, typesafe_score, typesafe_evaluate and typesafe_list_models, as a stdio server installable with dotnet tool install -g TypeSafe.Mcp.
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