CalibratedDecisions.

An independent directory of Jev, RLCD, and the things people are building.

Start here

IntroductionThe basic idea and vocabulary. QuickstartMake a first request. How to buildA guide to composing fast decisions. ConsoleTry the models directly. API referenceEndpoints and request shapes. Workflow evalsPublished task comparisons. Known limitsWhere the model can be uneven.

Ideas & patterns

PrimitivesThe core decision types. ConfidenceHow to read model certainty. PatternsWays to chain small judgments. Use-case mapWhere rapid classification fits. Parallel questionsAsk several questions at once. Re-rankingOrder a shortlist by relevance. Hierarchical classificationWork down a deep taxonomy.

Official kits

JavaScript SDKTypeSafe client for JS apps. Python SDKTypeSafe client for Python. System One adapterPython integration layer. Agent skillsReusable agent instructions. Vercel AI SDKJev evaluation provider.

Community clients

s1-rsTyped decision helpers for Rust. RubyLLM TypeSafeTypeSafe inside RubyLLM. Elixir SDKTypeSafe requests from Elixir. TypeSafeAI.NetA .NET client library. TypeSafe RailsRails integration. HA-JevJev in Home Assistant. Scala / ZIO SDKTyped questions from Scala. PHP SDKCommunity PHP client. jev-goTyped decisions in Go.

Agents & developer tools

BicameralDecision checks for agent work. EverySearch code with yes/no questions. Jev MCPJev tools for MCP clients. Jev ReviewFast checks in code review. jev-axiCLI judgments for coding agents. pi-wardenA guardrail for Pi agents. TypeSafe MCPTypeSafe calls exposed as tools. ForemanJev checks an agent's progress. pi-typesafeManaged TypeSafe client for Pi. jev-routerRoute agent turns by difficulty. Jev LogsPrioritize useful telemetry.

Browser & mobile

Jev BrowserBrowser tasks guided by Jev. Jev UltrafastRapid browser-action judgments. jev-mobileJev experiments on mobile. Computer useScreen OCR to mouse actions. UnclutterHide distracting page elements.

Demos & games

CrowdcheckSimulated reactions to a short post. TypeSafe TypewriterWatch classifications appear live. HEIST//ONEA Jev-powered heist game. Jev DroneTactical choices for a quadrotor. Jev Plays StarCraftGame decisions at speed. TypeSafe MarioA classifier in a platformer. Jev TetrisChoose each block's placement. Jev Pac-ManSelect turns at maze junctions. Jev GuardTry comment moderation. Little AirwaysTriage planes in a toy airport. Human CompilerScore corporate language.

Research & benchmarks

Rerank BenchTests Jev for result ordering. Spam EvalSpam-classification experiments. OpenJevOpen-model typed scoring baseline. TypeSafe BenchmarkCommunity performance tests. Technical field noteAn independent look at Jev. Phishing BenchEmail classification comparison. jevlikeIndependent option-scoring model. PocketJevOn-device iPhone visual choices.

Collections & community

Awesome TypeSafeBroad project and resource list. Awesome JevA Jev-focused community list. Awesome Jev by TypeSafeAnother curated Jev index. DiscordMeet people building with it. Launch postWhy System One and Jev exist.