Jev for Tool calling

408 curated Jev resources. Turn natural language into typed function calls and agent actions.

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Docs5
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Videos3
Posts7
Articles5
Playgrounds2

All 408 Jev resources for Tool calling

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Showing 337–384 of 408 resources

An MCP server for Antigravity IDE, Cursor, and Claude Code that uses Jev (jev-latest) to locate code semantically and audit git diffs, replacing broad grep sweeps of entire files.

Jev Tools & CLIs#community#python#mcp

Community

greenyamao/Antigravity-mcp-semantic-search-with-TypeSafeAiPython

TypeSafe AI Rust SDK (community)

A community Rust port of the official Python SDK with the same primitives, wire format, retries, and error semantics, plus derive macros for typed questions and answers.

Jev Repos & SDKs#community#rust#sdk

Community

community-ports/typesafeai-sdk-rust-communityRust

jev-use

Claude Code, Codex, and pi plugin plus MCP server and npm library that hands steps needing no text output to Jev: one batched call answers typed questions about a state, and an opt-in PreToolUse gate can only deny or ask.

Jev Tools & CLIs#community#javascript#claude-code

Community

shitianfang/jev-useJavaScript

jevQL

psql-shaped CLI and Go, TypeScript, and Python SDKs that let you write jev(), jev_prob, jev_choice, and jev_score in queries against vanilla PostgreSQL, judging the surviving rows with Jev in batches. No CREATE EXTENSION or superuser required.

Jev Tools & CLIs#community#go#postgres

Community

kylemclaren/jevqlGo

pi-warden

166

Pi extension that supervises a coding agent with Jev judgments: it holds risky tool calls, checks writes against project Markdown rules, and feeds most issues back to the agent as a steer instead of interrupting you. The conscience is beta and off by default.

Jev Tools & CLIs#community#typescript#guardrails

Community

DevMortimer/pi-wardenTypeScript

Jev Codex Router

273

Local Codex Router extension that asks Jev for a model tier and thinking depth on each model call, including continuations after tools, then relays the native Responses request verbatim. Fails open on Jev errors and logs decisions locally.

Jev Tools & CLIs#community#javascript#codex

Community

0xNatoshi/jev-codex-routerJavaScript

jev-mcp

Python MCP server that exposes classify, score, check, match, and screen tools to MCP-compatible agents, returning typed judgments over a closed answer set with token usage and latency. Ships generic triage and routing question examples.

Jev Tools & CLIs#community#python#mcp

Community

blakestone-x/jev-mcpPython

jev-guard

A security hook for coding agents that asks Jev three typed questions before every tool call and scans tool results for prompt injection, with adapters for Claude Code, Codex, Copilot CLI, Gemini CLI, Cursor, pi, OpenCode and ACP.

Jev Tools & CLIs#community#javascript#agents

Community

leepokai/jev-guardJavaScript

Augustus

An agent skill for deciding where typed judgments belong beside code, policy, and generation, with Jev examples for question design and abstention plus an offline probability and threshold evaluator.

Jev Tools & CLIs#community#skills#agents

Community

24601/AugustusPython

Jev Review

240

A local-first MCP server that gives Claude Code, Codex, Cursor, and OpenCode structured quality scores from Jev across correctness, complexity, tests, security, and other dimensions while the agent writes code.

Jev Tools & CLIs#community#typescript#mcp

Community

NiazMorshed2007/jev-reviewTypeScript

jev-seo

A Rust CLI and MCP server that reranks live DuckDuckGo SERPs with Jev and audits SEO/GEO readiness (schema, robots.txt, sitemaps, llms.txt) with a fifty-rule engine, no paid SEO subscriptions, and a local SQLite history.

Jev Tools & CLIs#community#rust#cli

Community

AkashPriyadarshii/jev-seoRust

jev-go

An unofficial, dependency-free Go SDK for Jev's System One API with direct TypeSafe and Vercel AI Gateway providers, an interactive CLI, and an installable agent skill that covers request and retry semantics.

Jev Repos & SDKs#community#go#sdk

Community

Stumble/jev-goGo

jev-browser

109

Unofficial browser automation where the calling LLM states the outcome and Jev decides each element, action, and value from a Playwright page snapshot. Ships as a library, CLI, and MCP server.

Jev Tools & CLIs#community#javascript#browser

Community

Ying-Kai-Liao/jev-browserJavaScript

jev-scout

A Rust CLI and stdio MCP server that grounds repository and crate discovery in live GitHub and crates.io metadata, then lets Jev score candidates so only verified, installable packages are returned.

Jev Tools & CLIs#community#rust#cli

Community

AkashPriyadarshii/jev-scoutRust

Bicameral

A hybrid coding harness for Pi where any LLM writes the code while Jev returns typed probabilities that deterministic policy code turns into allow, confirm, block, warn, or steer.

Jev Tools & CLIs#community#typescript#agents

Community

AbdelStark/bicameralTypeScript

Skillbox

267

A self-hosted, versioned skills library for AI agents with HTTP MCP, scoped client keys, and opt-in Jev recommendations that rank skills for a task using your own OpenRouter, TypeSafe, or Vercel key.

Jev Tools & CLIs#community#typescript#mcp

Community

kitze/skillboxTypeScript

JevRouter

458

A router that turns models, subagents, skills, MCP tools, CLIs, and plugins into one candidate set Jev answers with a single typed Choice, while the router code owns availability, permissions, and confirmation.

Jev Tools & CLIs#community#typescript#routing

Community

BillionsBobby/JevRouterTypeScript

commit-miner

A Rust CLI that classifies Git commit diffs and messages with Jev into bug fixes, security fixes with CWEs, and change types, then writes HTML or CSV reports from saved scans.

Jev Tools & CLIs#community#rust#cli

Community

devanshbatham/commit-minerRust

Jev Agent Skill Router

An optional routing layer for Hermes Agent, shipped as a Python CLI and library, that sends a request and a public skill catalogue to Jev and returns route, no_skill, or review plus confidence and candidate distributions.

Jev Tools & CLIs#community#python#routing

Community

GodsBoy/jev-agent-skill-routerPython

jev-cli

An unofficial Python CLI and stdio MCP server for Jev: send text or JSON state with typed questions and get machine-readable noul, choice, or score answers from the official API, OpenRouter, Vercel, or a proxy.

Jev Tools & CLIs#community#python#cli

Community

tumf/jev-cliPython

Clean Code Review

A hosted and self-hostable pull-request reviewer where Jev answers a Clean Code question set for each changed file and Luna writes the review from those answers; also exposed as a stateless Streamable HTTP MCP server.

Jev Tools & CLIs#community#typescript#mcp

Community

frostney/clean-code-reviewTypeScript

pi-fast-jev-compaction

A Pi extension that keeps conversation text verbatim while pruning stale tool history with Jev keep-or-drop decisions, falling back to Pi's built-in summary compaction when pruning cannot free enough context.

Jev Tools & CLIs#community#typescript#compaction

Community

joelhooks/pi-fast-jev-compactionTypeScript

pi-heed

A Pi extension that turns constraints stated in conversation into a scoped, replayable policy and checks every side-effecting tool call against it before it runs, with Jev only classifying how each message changes the policy.

Jev Tools & CLIs#community#typescript#guardrails

Community

Nyarlathoteppppp/pi-heedTypeScript

fast-jev-compaction

A Codex plugin and npm library that wraps native session compaction: Jev scores every tool call and result, and the verbatim history it keeps is re-injected after Codex summarizes. The README does not recommend using it.

Jev Tools & CLIs#community#typescript#codex

Community

leonaaardob/fast-dev-compactionTypeScript

jev-judgment

An Agent Skill that sends closed coding-agent judgments to TypeSafe Jev and acts on the probabilities, asking for yes/no, choice, and score answers in about 250 ms while the main coding model keeps writing code.

Jev Tools & CLIs#community#python#skills

Community

HyunjunJeon/jev-judgmentPython

jev-gate

A tool-call gate for Claude Code, Codex, Cursor, and other harnesses backed by Jev: deterministic rules and a read-only allowlist run first, then one request answers allow, ask, or deny in about 400 ms.

Jev Tools & CLIs#community#python#guardrails

Community

eugeniughelbur/jev-engineeringPython

Jevbridge

An ACP and MCP adapter that bridges TypeSafe Jev with any LLM: native Jev when TYPESAFE_API_KEY is set, or Codex, Claude, Grok, OpenCode, and OpenAI-compatible endpoints standing in as System One when it is not.

Jev Repos & SDKs#community#typescript#mcp

Community

tacticocc/JevbridgeTypeScript

Notra

259

An open-source, commercially hosted generative-engine-optimization platform that uses Jev judgments within a broader application to track brand mentions and placement in AI answers across ChatGPT, Claude, Gemini, and Perplexity.

Jev Tools & CLIs#community#typescript#postgres

Community

usenotra/notraTypeScript

limpet

A Stop hook that keeps coding agents from quitting early: rules written in plain language are scored by Jev in about 0.7 seconds, and a violated rule sends the agent back to work instead of letting it stop.

Jev Tools & CLIs#community#python#claude-code

Community

noplan-inc/limpetPython

QuantDinger

12.6k

A self-hosted AI trading platform that can put Jev in front of strategy and Quick Trade entry orders as an auditable PASS/REJECT gate, with LLM fallback and deterministic bypasses for exits and protective orders.

Jev Cookbooks#community#python#trading

Community

OpenByteInc/QuantDingerPython

quackd

257

A Python CLI that connects multiple robots under one contract with an optional Jev stepper: Jev picks among permitted discrete calls while an LLM writes poses and prose and the executor enforces safety gates.

Jev Tools & CLIs#community#python#robotics

Community

rokbenko/quackdPython

Hippo

777

A local SQLite memory layer for CLI agents with an opt-in Jev reranker that batches Noul judgments over the top 40 recalled memories and falls back to a local cross-encoder on errors.

Jev Tools & CLIs#community#typescript#agents

Community

kitfunso/hippo-memoryTypeScript

Awesome Jev / TypeSafe

580

A community field guide to TypeSafe's Jev with one documented support-ticket call, runnable JavaScript and Python starters, a JSON directory, and links to independent evaluations.

Jev Guides & Articles#community#awesome-list#sdk

Community

AbdelStark/awesome-typesafe-jevHTML

Awesome Jev Skills

595

A collection of Jev demos, workflows, and agent skills for coding agents: five installable skills and 108 scenarios, installed by pointing Codex, Claude Code, or OpenCode at an agent prompt.

Jev Tools & CLIs#community#python#skills

Community

wuyoscar/jev-skillPython

Awesome Jev - System-1 Agent Architecture Radar

678

A source-backed radar of open-source Jev projects with commit-pinned code evidence across 17 domains, plus a searchable site, an agent skill, and issue-based submissions.

Jev Guides & Articles#community#javascript#awesome-list

Community

logicrw/awesome-jev-projectsJavaScript

jev-mobile

Experimental Android sub-agent that gives Jev a bounded list of technically valid UI actions per step, with requirement-driven subgoals, durable SQLite tasks, confidence gates and escalation instead of coordinates.

Jev Tools & CLIs#community#python#agents

Community

Friedjof/jev-mobilePython

Robo Harness

An SO-101 workbench where an evaluation model or rules baseline picks bounded joint steps from typed candidate actions: decision runs are spend-capped via the Vercel AI Gateway and drive a real LeRobot arm or mock hardware.

Jev Cookbooks#community#typescript#robotics

Community

grmkris/robo-harnessTypeScript

NeuroLink

147

A Juspay TypeScript SDK that treats Jev as a third inference type beside generate and stream: providers declare which kinds they serve, and tryDecide returns typed boolean, choice, or score answers, null when no decision provider is set.

Jev Repos & SDKs#community#typescript#sdk

Community

juspay/neurolinkTypeScript

Formanator

102

A Rust CLI and MCP client for Forma benefit claims that can use optional Jev Choice questions to select from an account's valid benefit/category pairs, falling back to an LLM when Jev finds no match or is not confident.

Jev Tools & CLIs#community#rust#cli

Community

timrogers/formanatorRust

Jev × WebMCP Chrome Extension

129

A Chrome side panel that turns the current page's WebMCP tool schemas into typed Jev questions, predicting the tool call, its arguments, confidence, and latency as you type.

Jev Tools & CLIs#community#javascript#chrome-extension

Community

sdras/jev-webmcp-extensionJavaScript

AI Agent Skills

106

A collection of 26 production-ready agent skills for Claude Code, Cursor, Kiro, Windsurf, and OpenCode; four skills call TypeSafe Jev for calibrated Score and Noul judgments and fall back to heuristics when it is unavailable.

Jev Tools & CLIs#community#python#skills

Community

fabricioctelles/skillsPython

Jev Chat

115

A chat-shaped command bar where Jev picks the tool, arguments, confirmation, and reply type each turn, and code calls the MCP servers, so no LLM ever writes the reply text.

Jev Cookbooks#community#typescript#mcp

Community

w3cj/jev-chatTypeScript

save-token-jev

A Jev-guided context compaction library for coding agents: instead of summarizing old context, Jev decides which tool calls and results still matter while user and assistant text is kept verbatim.

Jev Tools & CLIs#community#typescript#compaction

Community

IAmUnbounded/save-token-jev-cleanTypeScript

MemSearch

2.7k

A cross-platform memory layer for AI coding agents: conversations from Claude Code, Codex, DeepSeek Harness, OpenClaw, and OpenCode become Markdown memories indexed in Milvus, with optional Jev reranking through the TypeSafe API.

Jev Tools & CLIs#community#python#agents

Community

zilliztech/memsearchPython

Beacon

1.8k

An open-source, local-first memory layer that captures session history across Claude Code, Cursor, Codex, OpenCode, Cline, and 20+ other harnesses, then has Jev judge bounded, redacted trace projections for reusable lessons a person reviews.

Jev Tools & CLIs#community#go#agents

Community

Asymptote-Labs/agent-beaconGo

tinystruct

360

A lightweight, pluggable Java framework for CLI, HTTP, and modular applications that carries Jev, TypeSafe, and MCP-server topics; added from Maven as org.tinystruct:tinystruct and requiring JDK 17 or higher.

Jev Repos & SDKs#community#java#cli

Community

tinystruct/tinystructJava

OpenAI Scala Client

255

An async Scala client for the OpenAI API and multiple providers, with a dedicated TypeSafe AI adapter that answers Jev System One typed questions alongside Anthropic, Gemini, Groq, and Perplexity support.

Jev Repos & SDKs#community#scala#sdk

Community

cequence-io/openai-scala-clientScala

Reticle

1.2k

An MCP server and agent skill that verifies coding-agent work by driving the real running app and returning pass, fail, or couldn't-tell verdicts with the file:line to fix; its listing frames the approach as Jev-style machine-native runtime perception.

Jev Tools & CLIs#community#typescript#mcp

Community

reticlehq/reticleTypeScript

Start here with Jev

Featured entries for tool calling.

Fast Jev Compaction

7.6k

A Claude Code plugin and npm library that replaces transcript summarization with Jev keep-or-drop judgments, deleting stale tool calls and results while kept text stays verbatim.

Jev Tools & CLIs#community#typescript#claude-code

Community

tamaratran/fast-jev-compactionTypeScript

jevQL

Jev Tools & CLIs#community#go#postgres

Community

kylemclaren/jevqlGo

Related use cases

Use cases that overlap with Tool calling.

Jev articles

Original guides that go deeper on Jev tool calling.

All Jev articles

The Cost of a Decision: Token Pricing and the Break-Even Point

Oct 12, 2026

Jev bills input tokens and gives output away, and questions in one call run in parallel. Why the state is where the money is, and how to size a request before you ship it.

Jev Practices & Patterns#pricing#cost#api

Read article

Retrieval with Decisions: Filter, Rerank, and Verify

Oct 12, 2026

Retrieval is a sequence of bounded judgments. How a decision model slots into passage filtering, semantic find, reranking, and citation checks, and what stays in deterministic code.

Jev Cookbooks#retrieval#reranking#rag

Read article

Jev in Customer Support: Triage, Routing, and Escalation

Oct 12, 2026

Support is a long chain of small judgments over text. Triage category and urgency separately, route with a confidence gate, decompose hard tickets, and decide the action in code.

Jev Practices & Patterns#customer-support#routing#triage

Read article

Watch: Jev in action

Video walkthroughs and demos from the community.

YouTube: Sam Witteveen on System 1 thinking, then Choice, Score, and Noul demos, and chained actions.

YouTube: Nate Herk compares speed and cost against ordinary models, then builds an X feed classifier and a paper-trading prototype.

YouTube: Ray Amjad puts Jev inside an agentic coding loop and looks at what it costs to run.

Discussions about Jev

Threads from Reddit and Hacker News about building with Jev.

Hacker News: OpenAI's Luna Decisions API framed as a fast follow to TypeSafe's Jev wave.

matt_d6 pointsOpenAI Answers TypeSafe's Jev with a Decision API Built on LunaRead the thread on Hacker News

Hacker News: Nikola Balić on what made the Jev launch easy to try and easy to share.

nkko2 pointsWhat TypeSafe Got Right with the Jev LaunchRead the thread on Hacker News

Hacker News: Pointer to a DiffusionGemma plus vLLM tutorial for a Jev-shaped classifier.

1 pointHow to build a Jev-style classifier with DiffusionGemma and vLLMRead the thread on Hacker News

Hacker News: SafeDep Gryph plus Jev checks for compromised coding-agent behavior.

2 pointsDetecting Compromised AI Coding Agents with Jev and GryphRead the thread on Hacker News

From the Jev community

Posts from builders shipping with Jev right now.

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