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JEV

Open-source directory

Every project here really calls Jev in its source · refreshed daily

788projects
182runnable here
765code receipts

ALL 788 PROJECTSEvery project

website/playground.mjs
questions: {
  refund: boolean,
  spam: boolean,
}
▶ runnable
@featherless-ai★ 312

simple-jev

Turn any open model into a classifier/jev endpoint

InfrastructurePython
packages/api/examples/benchmark.ts
questions: {
  refund: boolean,
}
▶ runnable
@iammrduncan★ 32

typesafe-ai-benchmark

This is a LLM Gateway that mimics typesafe ai structured output. Like an imposter Jev.

InfrastructureTypeScript
tests/live_scoring.mjs
questions: {
  route: choice,
  urgent: boolean,
  severity: score,
}
▶ runnable
@pst2154★ 9

Nemotron_Jev

Nemotron Diffusion Decision Lab

InfrastructureHTML
src/routing-policy.ts
questions: {
  model: choice,
  effort: choice,
  is_followup: boolean,
}
▶ runnable
@adarshmishra07★ 2

jcm-router

Local proxy that picks the Claude model and effort per message using TypeSafe Jev. Routes subagents, leaves your cached main chat alone.

InfrastructureTypeScript
python/tiershift/signals.py
questions: {
  difficulty: score,
  needs_reasoning: boolean,
  stakes: score,
  // +5
}
▶ runnable
@iamvatsalpatel★ 2

tiershift

Shift every LLM call to the cheapest model that can handle it. Routing decided by TypeSafe Jev in ~180 ms. No training data. Policy in plain YAML. TypeScript and Python.

InfrastructureTypeScript
apps/web/src/snippets.ts
questions: {
  is_billing: boolean,
}
▶ runnable
@molis-ai★ 2

jev-workbench

Build versioned judgment functions on TypeSafe's Jev once, then call the same published version from your backend over HTTP and from coding agents over MCP. The vendor key stays on your machine.

InfrastructureTypeScript
src/app/docs/page.tsx
questions: {
  hallucination_sensitive: boolean,
}
▶ runnable
@tylerjharden★ 2

ailerix

Type-safe model router. Jev (System One) banks each request to a typed catalog route.

InfrastructureTypeScript
probe.mjs
questions: {
  tier: choice,
  is_greeting: boolean,
}
▶ runnable
@az9713★ 1

jev-model-router

Jev (TypeSafe) model router on the Vercel AI Gateway

InfrastructureJavaScript
src/jev_admit.ts
questions: {
  same_intent: boolean,
}
▶ runnable
@kushals256★ 1

jevcache

Skip expensive LLM calls when TypeSafe Jev says same intent. OpenAI-compatible local cache proxy — npx @kushalicious/jevcache

InfrastructureTypeScript
tests/nexus/unit/jev-payload-guardrails.test.ts
questions: {
  eligible: boolean,
}
▶ runnable
@Mistertelecom★ 1

NEXUS-AI-Gateway-with-JEV

AI gateway that validates before it executes: Lead plans, JEV validates, Worker generates. Local-first control plane, 359-provider catalog.

InfrastructureTypeScript
sql/jev--0.1.0--0.2.0.sql
--   jev.api_url            default 'https://api.typesafe.ai/v1/systemone' (proxies, mocks, tests)
@realZachi★ 225

pg-jev

Ask your Postgres tables questions in plain language. A PostgreSQL extension powered by TypeSafe's Jev.

InfrastructureShell
src/openjev/api.py
"/v1/systemone",
@ekzhang★ 204

openjev-sglang

Jev-compatible API endpoint based on open models (prefill-only)

InfrastructurePython
typesafe.c
"https://api.typesafe.ai/v1/systemone"
@giuliosmall★ 79

pg_typesafe

Pre-alpha PostgreSQL extension for TypeSafe AI (Jev) categorical classification

InfrastructureC
scripts/mock-jev.mjs
// mock-jev: a local stand-in for TypeSafe's `POST /v1/systemone`, for driving the router
@vinilana★ 58

jev-gateway

A local LLM gateway for coding agents. When your agent is about to decide which tool to call,

InfrastructureTypeScript
src/index.ts
const res = await fetch(`${options.baseURL ?? 'https://api.typesafe.ai'}/v1/systemone`, {
@yusukebe★ 39

hono-jev-router

Route HTTP requests by meaning. A semantic router for Hono powered by Jev.

InfrastructureTypeScript
src/routing/jev/remote.ts
*   - api.typesafe.ai (commercial Jev, "System One")
@Das-rebel★ 16

a3m-router

⚡ Adaptive multi-model LLM router — 80+ providers, Jev System One single-pass routing (model=jev-auto), pheromone-trail failover, parallel ensemble merge. npm: adaptive-memory-multi-model-router

InfrastructureTypeScript
src/jev_client.cpp
static constexpr const char *SYSTEMONE_PATH = "/v1/systemone";
@colliber★ 13

duckdb-jev

DuckDB extension: typed Jev answers as real SQL types

InfrastructureC++
index.ts
import { createGateway, experimental_evaluate as evaluate } from "ai";
@mejiasd3v★ 7

pi-jev-router

Automatic model routing for Pi using TypeSafe's Jev through Vercel AI Gateway

InfrastructureJavaScript
src/jev.js
export const DECISIONS_URL = 'https://api.typesafe.ai/v1/systemone'
@ponyo877★ 5

jev-telop-live

Talk to your camera, and Japanese variety-show captions and manga effects appear on their own, matched to what you are saying.

InfrastructureJavaScript
src/index.ts
import { TypeSafeClient } from "@typesafe-ai/sdk";
@andrelandgraf★ 4

safer-with-jev

Neon Function proxy for the Neon AI Gateway with TypeSafe Jev routing.

InfrastructureTypeScript
src/jev/classifier.ts
import { score, TypeSafeClient } from "@typesafe-ai/sdk";
@rajdhakad9826★ 4

jev-router

Cost-aware LLM router that picks the cheapest model capable of handling a query, using TypeSafe's Jev for fast classification instead of an LLM call.

InfrastructureTypeScript
jev_router/deciders.py
TYPESAFE_URL = "https://api.typesafe.ai/v1/systemone"
@prismhq★ 3

jev-router

Open-source LLM router that uses TypeSafe's Jev to pick a model, on top of LiteLLM

InfrastructurePython
slo_router/core.py
"model": "typesafe/jev-1.13",
@zeeshan8281★ 3

slo-router

SLO-aware LLM inference router with Jev decisions, live queue metrics, counterfactual evaluation, and reproducible latency/cost benchmarks

InfrastructurePython
src/jev_model_router/config.py
jev_model: str = "jev-latest"
@Pinutss★ 2

jev-model-router

Route among multiple LLMs and multi-model provider keys without leaking secrets.

InfrastructurePython
vgi_typesafe/auth.py
DEFAULT_BASE_URL = "https://api.typesafe.ai"
@Query-farm★ 2

vgi-typesafe

A VGI worker exposing TypeSafe System One questions (choice, noul, score) to DuckDB/SQL as LATERAL-joinable table functions

InfrastructurePython
src/provider-typesafe.ts
* Falls back to `POST {baseURL}/v1/systemone` with the same wire questions
@alpbahadur★ 1

jevrouter

Drop-in decision/routing layer powered by TypeSafe Jev (System One) — typed Choice/Noul/Score routes with production safety gates.

InfrastructureTypeScript
src/decision/jev-router.mjs
const { TypeSafeClient, choice, noul, score } = await import("@typesafe-ai/sdk");
@cannacre8ive★ 1

switchboard-ai

Adaptive multi-model AI orchestration runtime using Jev for cost-aware routing, confidence-based escalation, tool selection, and model execution

InfrastructureJavaScript
jevify/cli.py
"url": f"http://{args.host}:{args.port}/v1/systemone",
@fidecastro★ 1

jevify

Supersimple way to serve LLMs as a Jev-like endpoint

InfrastructurePython
src/model_router/classifier.py
JEV_ENDPOINT = "https://api.typesafe.ai/v1/systemone"
@lucianfialho★ 1

jev-model-router

Cost-optimized OpenRouter model router using TypeSafe's Jev, with a live full-catalog scorer instead of a hardcoded model list

InfrastructurePython
src/router.ts
delivery = { via: "jev" };
@MobAI-Inc★ 1

Cynosure

Jev-based adaptive model routing with structured decisions, persistent feedback, and hybrid retrieval

InfrastructureTypeScript
src/jevlocal/app.py
"""FastAPI app: POST /v1/systemone, Jev-compatible contract."""
@us★ 1

jev-local

Local Jev-compatible evaluation server: POST /v1/systemone with typed noul/choice/score, open weights, no waitlist

InfrastructurePython