Jev ecosystem
A deliberately small directory of projects checked at their original repositories. JevHub does not rank these projects or treat inclusion as an endorsement.
Official
TypeSafe JavaScript SDK
Official TypeScript/JavaScript client for System One requests, including Choice, Score, and Noul builders with inferred answer types.
Last checked: 2026-09-21
TypeSafe Python SDK
Official Python client for TypeSafe's System One API, useful when Jev decisions live in Python services or data pipelines.
Last checked: 2026-09-21
System One Adapter (Python)
Official adapter that exposes a TypeSafeClient-compatible interface backed by chat-model providers for side-by-side workflow comparisons.
Last checked: 2026-09-21
TypeSafe Agent Skills
Official agent skill material for using System One primitives and evaluation patterns from coding agents such as Codex and Claude Code.
Last checked: 2026-09-21
SDKs
advocaat
A compact community client that wraps TypeSafe/Jev decisions behind a type-oriented developer API.
Last checked: 2026-09-21
typesafe-ai (Rust)
Community Rust client for TypeSafe AI with typed request/response handling for System One workloads.
Last checked: 2026-09-21
typesafe-sdk-go
Community Go SDK for the TypeSafe API, aimed at typed questions and probability-bearing answers in Go services.
Last checked: 2026-09-21
typesafe-sdk-swift
Community Swift SDK for TypeSafe AI, providing a native path for Apple-platform applications to call System One.
Last checked: 2026-09-21
Integrations
Vercel Eve
Vercel's open agent framework; its experimental evaluation path includes Jev as a decision/evaluation model option.
Last checked: 2026-09-21
Vercel AI CLI
A Vercel Labs terminal tool whose evaluation workflow can use Jev as the evaluator.
Last checked: 2026-09-21
zod-jev
Combines local Zod shape validation with Jev-powered semantic judgments so application code can validate structure and meaning separately.
Last checked: 2026-09-21
zio-typesafe-ai
Scala 3 / ZIO integration for the System One API with typed multi-question calls.
Last checked: 2026-09-21
Playgrounds
TypeSafeAI Community Playground
A large community playground exploring Jev patterns, workflows, routers, browser-agent experiments, and evaluation-oriented examples.
Last checked: 2026-09-21
Jev Playground
A community playground focused on trying Jev primitives and inspecting structured outputs from a browser-oriented interface.
Last checked: 2026-09-21
Agent / Tooling
Jev Ultrafast
Browser-use experiment where Jev selects browser operations and targets from a constrained action space while text generation is handled separately.
Last checked: 2026-09-21
Foreman
Agent-supervision tooling that uses Jev-style decisions to help keep coding-agent workflows aligned with their current task.
Last checked: 2026-09-21
jev-review
A community staged code-review workflow and local dashboard that uses Jev for bounded review decisions.
Last checked: 2026-09-21
jev-mcp
An MCP server that exposes Jev judgments to coding-agent and MCP-client workflows.
Last checked: 2026-09-21
jevwire
A decision layer for agents that combines an MCP surface, an embeddable library, and escalation-oriented integrations.
Last checked: 2026-09-21
Agent Chaperone
Screens agent tool calls and tool results around the execution boundary, providing a useful example of semantic checks surrounding deterministic controls.
Last checked: 2026-09-21
Canny
Open-source agent-completion tooling that focuses on evidence before accepting claims that a coding task is finished.
Last checked: 2026-09-21
jev-router
Open-source LLM-routing project that uses Jev to select a model from a bounded catalog on top of LiteLLM.
Last checked: 2026-09-21
Open Source / Research
Awesome Jev
A community-maintained, searchable directory of Jev projects that JevHub uses only as a discovery source before checking original projects.
Last checked: 2026-09-21
SemIf
Independent research project exploring Jev-like semantic if-statements with open models; useful as evidence that the decision-model pattern extends beyond one provider.
Last checked: 2026-09-21
How this directory is maintained
- Items must have a public, directly verifiable project URL.
- Descriptions are written by JevHub rather than copied from a list.
- No stars, ratings, or “best project” rankings are used in V0.1.
- V0.1 is manually curated; it does not automatically mirror another directory.
Want to learn the primitives first? Read What is Jev? or start from eight practical templates.