Jev AgentA source-verified directory of 487 Jev projects — browser agents, model routers, SDKs and MCP servers — each one showing the exact decision it hands to Jev. Curated by the Awesome Jev community, mirrored here under MIT.
Give Jev the current state and a few options. Get the Agent’s next step.
Core call · setup in the full example
const nextStep = choice("What next?", { login: null, askUser: null, retry: null });
const { answers } = await client.systemOne({ state: "Login form is ready", questions: { nextStep } });
console.log(answers.nextStep.choice);Node.js 20+ · Set TYPESAFE_API_KEY on your server. This page shows code and makes no model requests.
An optional Jev provider in Vellum Assistant sends conversation state and explicit questions to TypeSafe.
Submits state and question bundles to System One and returns structured answers to the Assistant.
Adds choices, probabilities, and scoring to an existing assistant.
Eight MCP tools for evidence checks, content screening, search, reranking, classification, comparison and extraction.
Uses typed questions to assess evidence support, content risk and candidate relevance.
Returns judgments and probabilities; the caller owns thresholds and enforcement.
An MCP server that lets Claude Code, Claude Desktop, Codex and Pi ask Jev typed questions.
Submits state and Choice, Score or Noul questions and returns structured answers with probabilities.
Provides decisions that calling code can inspect and branch on.
A Pi Jev extension providing a decision tool, terminal playground commands and an API for other extensions.
A shared client batches typed questions, validates responses and records usage and availability.
Centralizes key and client handling so other extensions can reuse the decision interface.
Exposes a shared structured-decision interface for Jev and other models through ACP, MCP and a CLI.
Sends state and bounded questions to the chosen backend, with an offline rule backend also available.
Lets agents compare or replace decision backends through one interface.
Synkora includes optional TypeSafe client tools for classification, scoring and yes/no judgments.
Sends workflow state and named questions to Jev and returns structured answers to agents.
Makes these judgments available within existing platform workflows.
Helps Pi Agents find tools and skills for a task, with structured evaluation and optional history filtering.
Judges how candidate tools, skills, and history relate to the task so local rules can load or retain them.
Lets capabilities enter an Agent workflow on demand.
A Jev Decisions adapter in a KDE Plasma assistant widget for displaying structured judgments.
Converts the current message into decision questions and receives answers from TypeSafe or a compatible Decisions endpoint.
Makes decision models available in an existing desktop assistant UI.
Wraps Jev classification, scoring, yes/no judgments and candidate matching as MCP tools.
The MCP server calls the TypeSafe SDK and returns choices, probabilities and scores.
Provides a shared decision interface for MCP-compatible clients.
Provides Jev MCP tools, an embeddable library and Claude Code hooks for Agents.
Uses Jev for ranking, verification, action checks and next-step selection, with code applying policy.
Reuses the decision layer through MCP or host code; hook behavior depends on configuration.
An MCP server and Claude Code plugin for Jev classification, scoring, checks and batched questions.
Calls TypeSafe with Choice, Score and Noul questions and returns structured answers.
Makes the typed decision primitives available to MCP clients.
A local Jev tool-routing gateway for coding Agents, with an MCP suggestion interface.
Jev selects among available tools; adapters may record suggestions or influence actual tool selection.
Keeps decision logs while some clients remain observation-only or choose whether to follow suggestions.
Open-source Codex plugin for TypeSafe Jev decision consultation, failure diagnosis, and evidence-based completion review
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
This repository is an MCP server for TypeSafe Jev that provides a single evaluate tool taking state plus typed questions and returning noul, choice, or score answers with probabilities.
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
On success each tool returns its typed result directly. On failure the tool call fails at the MCP protocol level (`isError: true`) with a short, safe message — no response body or stack trace is ever echoed back.
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
Rust-aware code review for Claude Code and coding agents, powered by TypeSafe Jev
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
Defines, tests, and publishes Jev decision functions in a local UI so backends and Agents can call fixed versions.
Encodes classification or evidence checks as Noul, Choice, or Score questions sent to TypeSafe.
Lets multiple callers reuse the same versioned decision function.
An n8n community node for submitting typed questions to TypeSafe Jev.
Builds state and questions from input items, calls Jev and appends or separately outputs answers.
Supports form or JSON question configuration and use as an Agent tool.
MCP server wrapping TypeSafe's Jev System One models — typed noul/choice/score judgments for AI agents
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
Documentation, an MCP server and a Skill for designing Jev judgments with question linting, batch evaluation and calibration.
Runs Choice, Score and Noul over samples and uses measured results to design local thresholds.
Connects question design, sample evaluation and runtime rules.
Local MCP server exposing TypeSafe Jev (System One decision model) as native Claude Code / Codex tools
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
MCP server for Jev (TypeSafe System One): the three official question types — choice, score, noul — plus batch classify. Calibrated probabilities, ~0.5s, <$0.001/call.
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
An evaluation-focused Jev MCP server for individual questions, batch processing and question or threshold comparisons.
Runs typed questions and uses labeled samples to measure accuracy and calibration.
Makes question design and threshold choices inspectable through sample results.
MCP local que expone Jev (TypeSafe) como herramienta para Claude Code, Codex, Hermes y cualquier agente: ask_jev y list_jev_models, sin dependencias
Jev returns a structured decision for the local program; consult the source for the exact decision policy.
Adds structured choices or scores to the workflow; performance and cost benefits have not been independently verified.
A community-maintained directory and radar for Jev, highlighting open-source projects with verified code and clear decision architectures.
Jev is TypeSafe's decision model. This directory groups projects by how they use choices, scores and probability judgements, with implementation links to help you assess fit for your own task.
TypeSafe ↗We prioritize open-source projects with clear Jev implementation evidence. Repositories without verifiable source code are excluded from the main directory.
Directory data and design from Awesome Jev by logicrw, used under the MIT License.
