Jev for Tool calling

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

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Articles5
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All 408 Jev resources for Tool calling

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Showing 1–48 of 408 resources

Vercel's agent framework with Jev wired into its experimental evaluate path, so the scoring step of an agent returns typed decisions rather than prose the surrounding code has to parse.

Jev Integrations & Adapters#community#vercel#agents

Community

jev-permission-gate

A Claude Code plugin that replaces the built-in auto-mode permission classifier with Jev, deciding tool calls in about half the time while agreeing with the original on the calls it handles.

Jev Agents & MCP#community#claude-code#security

Community

madisonrickert/jev-permission-gateTypeScript

A data analyst agent with Jev as the review layer

An open-source data analyst agent that keeps Qwen for generating SQL and uses Jev as a review layer at three checkpoints: question clarity, SQL fidelity to the request, and whether the final explanation is grounded in the returned rows.

Jev Demos & Experiments#community#agents#sql

Community

Strands Decider 2B

Strands Agents' small decider for agent plumbing: routing, tool selection, triage, and guardrails from a 2B LoRA checkpoint that serves /v1/systemone locally or through a Python package.

Jev Models & Reimplementations#community#open-models#local

Community

Holon

159

Rust agent workbench for ongoing work that keeps branch decisions in their own crate and backend notes in the adapter. Its first decision backend is Cloudflare's Clef, borrowing Clef's System One-shaped state and questions request instead of reinventing the interface.

Jev Integrations & Adapters#community#agent-runtime#rust

Community

holon-run/holonRust

WebJev

Apache-2.0 decision models for browser agents: a Qwen3.5-35B-A3B fine-tune that answers jev-ultrafast's per-step operation and target-element Choice questions in one forward pass behind a Jev-compatible /v1/systemone API. Includes training code, a serving stack and a 125-task real-website evaluation.

Jev Models & Reimplementations#community#browser#open-weights

Community

lexmount/WebJevPython

dsh-jev-interceptor

A DeepSeek Harness plugin where Jev Choice and Noul checks gate every non-read-only tool call - deny confident high-risk calls, escalate ambiguous ones, auto-approve clearly granted reversible ones - and optionally score session messages so valuable context survives instead of being dropped oldest-first.

Jev Tools & CLIs#community#plugin#guardrails

Community

AskTheWay/dsh-jev-interceptorTypeScript

Harness Router

MIT-licensed Python tool router for coding agents that keeps obvious calls on a fast path, asks Jev (default typesafe/jev-1.13 via OpenRouter) for genuinely ambiguous choices, and can run bounded MCTS when multi-step consequences matter. Ships a CLI, MCP server and hook integrations.

Jev Tools & CLIs#community#routing#mcp

Community

Protocol-Lattice/harness-routerPython

Cline Plugins

Cline's official curated plugin collection for its CLI and extensions. Includes jev-browser, which executes browser goals with Jev through Vercel AI Gateway plus screenshots and isolated Chromium sessions; plugins install by directory slug, e.g. cline plugin install jev-browser.

Jev Tools & CLIs#community#cline#plugins

Community

cline/pluginsTypeScript

Sim

29.8k

Open-source workspace with 29,796 stars for building, deploying and monitoring AI agents and workflows -- visual builder, chat, tables, files and knowledge -- featuring native TypeSafe System One evaluation and decision provider integration.

Jev Integrations & Adapters#community#agents#workflow-automation

Community

simstudioai/simTypeScript

Public Browser

MCP server that lets Claude Code, Cursor and other clients drive Chrome over the DevTools Protocol, exposing an accessibility-tree menu of stable refs. Its example Jev loop has Jev pick browser actions from that menu, and the README reports about a third fewer tokens and a quarter fewer tool calls in a blind benchmark.

Jev Agents & MCP#community#mcp#browser-automation

Community

Silbercue/public-browserTypeScript

Eliza

19.6k

Open-source TypeScript agentic operating system: a core runtime, app for web and mobile, CLI, cloud services and first-party plugins. The directory's curated summary reports it integrates TypeSafe System One decision services for sub-100ms intent classification, action dispatching and confidence-gated tool execution.

Jev Integrations & Adapters#community#agents#framework

Community

elizaOS/elizaTypeScript

Oh My ClaudeCode

39.8k

A teams-first multi-agent orchestration plugin for Claude Code with opt-in Jev hooks for sub-millisecond judgment points, decision caching and per-point egress controls. TypeScript, MIT, with a staged team pipeline and tmux CLI workers.

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

Community

Yeachan-Heo/oh-my-claudecodeTypeScript

3.4k

Vercel Labs' Unix-like coding agent CLI written in Zig, shipping a typesafe_permission_reviewer builtin that runs the agent's permission decisions through Jev rather than an LLM call. Model-agnostic and embeddable via libfx and ACP.

Jev Tools & CLIs#community#coding-agents#cli

Community

vercel-labs/fxZig

BrowserClaw

Chrome MV3 extension plus a local MCP server exposing 50 browser tools; its chrome_act_toward_goal micro-loop uses TypeSafe Jev System One or a local decider to pick the next action on an 85%+ pruned, Shadow-DOM-pierced DOM tree, dispatching trusted CDP events in logged-in Chrome without stealing focus.

Jev Agents & MCP#community#mcp#browser-automation

Community

GoldenLoaf24h/browserpawTypeScript

jcode

20.4k

Rust coding-agent harness (MIT, ~20k stars) whose crates/jcode-base/src/jev.rs is a typed TypeSafe Jev decision transport, used for memory pruning (memory_jev.rs), browser navigation (browser_jev.rs), and voice routing (voice_intent.rs) with separate provider selectors per purpose.

Jev Tools & CLIs#community#rust#coding-agent

Community

1jehuang/jcodeRust

pi-verdict

Permission gate extension for the pi coding agent: deterministic allow/deny rules and protected paths settle clear cases first, then gray-zone tool calls get one structured classify() verdict; Jev is an optional native classifier via TypeSafe direct, OpenRouter, or other gateways, failing closed on error.

Jev Tools & CLIs#community#guardrails#permissions

Community

jesset/pi-verdictTypeScript

r2r-jev

Agent governance integration where Jev judges two Noul checks per tool call (beyond scope, destructive), an admission policy decides which judgments may become evidence, and admitted evidence degrades Trust, Delegation and Authorization in persistent R2R relation state.

Jev Integrations & Adapters#community#governance#agent-security

Community

Thneoly/r2r-jevRust

Pydantic AI

20.5k

Python agent framework whose TypeSafeModel class runs Jev as a decision model inside Pydantic AI agents: Pydantic output-type fields become typed Jev questions answered together in one request, each answer carrying its own confidence, and tools can be offered as Choice options.

Jev Integrations & Adapters#community#agents#framework

Community

pydantic/pydantic-aiPython

Jev Robot

MuJoCo simulation where a local decider-2b model picks the next skill for an AgileX PiPER arm through a Jev-style typed-choice interface while the red cube target is pushed to new positions mid-run. Deterministic checks may reject a chosen skill but never substitute another.

Jev Demos & Experiments#community#robotics#simulation

Community

Hu-xiao-max/jev_robotPython

System One Harness

209

A Python harness for System One models. It runs Jev and other decision models locally, or through HarnessRouter.ai.

Jev Tools & CLIs#community#python#open-models

Community

HarnessRouter/SystemOneHarnessPython

tev1-50-use-cases

Fifty runnable tev1 decision-model examples through local Ollama, from ticket triage and guardrails to six playable games, with a live request viewer and scoreboard.

Jev Demos & Experiments#community#github

Community

PromptEngineer48/tev1-50-use-casesPython

jev-mcp

MCP server that exposes Jev classify, score, yes-no check, risk gate, and multi-question decide tools to coding agents through one Jev call per tool.

Jev Agents & MCP#community#github

Community

codaaiteam/jev-mcpJavaScript

promptrejectormcp

Prompt-injection scanner that combines deterministic checks with focused Jev judgments and a configurable reasoning model, exposed over CLI, SDK, HTTPS, MCP, and editor plugins.

Jev Agents & MCP#community#github

Community

revsmoke/promptrejectormcpTypeScript

agent-guard

Claude Code PreToolUse hook that screens Bash, file edits, and tool calls with Jev risk, policy, and allow-ask-deny judgments before execution.

Jev Agents & MCP#community#github

Community

NieXi/agent-guardPython

agent-harness-with-jev-llm

Demo of the LangChain Jev harness pattern in LangGraph: a fast classifier routes events and gates a risky tool call, leaving open-ended reasoning to a chat LLM. Entry is POST /events; output lands in JSONL files.

Jev Agents & MCP#community#github

Community

dhirajpatra/agent-harness-with-jev-llmPython

skillranker

Standalone Rust CLI that ranks an agent's available skills for the next step with two Jev evaluation passes over live session context, plus an explicit none-of-these option. Advisory only; it never loads skills itself.

Jev Agents & MCP#community#github

Communityivorpad/skillranker

jev-lab

Portuguese-language customer-service study with two Jev experiments: a pre-agent guardrail filtering inbound messages and a per-turn pre-evaluator escalating only failures and borderline calls to an LLM judge.

Jev Benchmarks & Evaluations#community#github

Community

JoaoClemer/jev-labTypeScript

jeb

Command-line client for the System One API aimed at scripts, shell pipelines, and agent tool calls: pipe in a state with typed questions and get typed decisions back without a full LLM workflow.

Jev Agents & MCP#community#github

Community

wnoronha/jebRust

brain-speeddial-eeg-jev

Offline prototype replaying public Shin 2017 EEG sample-by-sample to trigger intents, gate actions with a Jev policy question, and confirm via repeat or imagery before a mock agent acts.

Jev Agents & MCP#community#github

Community

AshwaniKottapalli/brain-speeddial-eeg-jevPython

jeveloper

Claude Code plugin that puts Jev judgments in the agent loop to route tool calls, verify outputs, judge completion, and pick next actions with metered calls.

Jev Agents & MCP#community#github

Community

pur4v/jeveloperPython

opencode-smart-reasoning

OpenCode plugin that asks Jev once per prompt how much reasoning is needed, then maps minimal to xhigh effort onto the model's own variants without rewriting prompts.

Jev Agents & MCP#community#github

Community

d0nj/opencode-smart-reasoningTypeScript

jev-agent-guardrail

Python guardrail that intercepts agent tool calls, sends agent state plus tool details to Jev, and allows, blocks, or reroutes execution based on Choice, Score, and Noul answers.

Jev Agents & MCP#community#github

Community

bhanuprakashk90-tech/jev-agent-guardrailPython

jevmap

Codebase mapper that indexes a repo into small units without AI, then asks Jev which units matter for a plain-language task and returns ranked files with line numbers and probabilities.

Jev Agents & MCP#community#github

Community

aegsrl7/jevmapJavaScript

jev-flight-agent

Browser-use agent that completes flight searches in real Chrome: Jev picks each next action from an indexed DOM table while a small model handles only text entry.

Jev Agents & MCP#community#github

Community

kallurayaankit/jev-flight-agentPython

pi-jev-gate

Pi extension that checks file-mutating tool calls against written rules in constraints.md, asking Jev which rule a change violates and offering rework with the rule text.

Jev Agents & MCP#community#github

Community

hcl-z/pi-jev-gateTypeScript

backoffice-agents

Backoffice email pilot where the LLM generates and uses CRM and ERP tools while Jev triages, gates tool calls, and verifies drafts before sending, with Telegram human approval.

Jev Agents & MCP#community#github

Community

lucianoon/backoffice-agentsPython

lean-codex-stack

Reusable Codex setup separating stable AGENTS.md rules, the TypeSafe skill, Caveman conciseness modes, and the task prompt, with a Markdown guide and printable PDF.

Jev Agents & MCP#community#github

Community

KelvinxG/lean-codex-stack

typesafe-mcp

Python MCP server over stdio that exposes Jev to an agent fleet with judge, rerank, and raw systemone tools plus Ollama-backed compilation.

Jev Agents & MCP#community#github

Community

Obrais-cloud/typesafe-mcpPython

jev-mcp

Rust stdio MCP server letting Codex offload bounded judgments to Jev: four tools for yes/no, choice, score, and batch, while Codex keeps investigation, edits, and tests.

Jev Agents & MCP#community#github

Community

ieee0824/jev-mcpRust

jev-mcp

Community Node.js MCP server exposing Jev as four read-only advisory tools for bounded probabilistic decisions, with the host model keeping final authority over every action.

Jev Agents & MCP#community#github

Community

Afloat16/jev-mcpTypeScript

jev-decision-maker-at-meteora

Condor drop-in where Jev Noul fan-out ranks Meteora pools and a Score sizes positions, while math clamps enforce rug cards, cost tiers, dry-run, and one-sided walls.

Jev Agents & MCP#community#github

Community

cedarmuse-creator/jev-decision-maker-at-meteoraPython

cda-abm-ai-agents

Mesa market testbed pitting zero-intelligence traders against Jev archetype agents, with paired Monte Carlo stats, a live dashboard, and a pre-rendered econometrics notebook.

Jev Agents & MCP#community#github

Community

JiriNohejl/cda-abm-ai-agentsJupyter Notebook

pokemon-showdown-jev-agent

Gen 9 Random Battles agent that sends a structured battle view to Jev each turn, validates the legal choice, and shows telemetry on a dashboard.

Jev Demos & Experiments#community#github

Community

NatBrian/pokemon-showdown-jev-agentJavaScript

vibecheck-mcp

MCP done-gate for coding agents: it diffs git reality, measures conventions deterministically, asks Jev eight quality questions, and returns a fix list.

Jev Agents & MCP#community#github

Community

BilalUchiha/vibecheck-mcpTypeScript

demo-video-javascript-jev-starter

Demo pairing Vonage Video API with Jev: chat sentiment and frustration scoring offers a video call and pings an employee dashboard.

Jev Agents & MCP#community#github

Community

Vonage-Community/demo-video-javascript-jev-starterJavaScript

jev-enhanced-plugin

Agent plugin adding typed Jev judgment packs to six existing coding skills for Codex, Claude Code, and Oh My Pi, without changing their procedures.

Jev Agents & MCP#community#github

Community

JiaWeiXie/jev-enhanced-pluginJavaScript

laya-deploy

Reproducible deployment turning local open-weight Laya into the judgment backend for oh-my-pi, so small checks run on your own GPU.

Jev Agents & MCP#community#github

Community

Pidbid/laya-deployPython

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

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

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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