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Jev for Tool calling

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

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  • Docs5
  • Repos & sites386
  • Videos3
  • Posts7
  • Articles5
  • Playgrounds2

All 408 Jev resources for Tool calling

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Showing 385–408 of 408 resources

Awesome Jev
193GitHub stars
A curated, awesome-lint-clean list of projects built on TypeSafe's Jev, the first System One model, with a searchable site whose search is reranked by Jev and a "know before you build" section on limits.
Jev Guides & Articles#community#awesome-list#skills
Communityvalentynkit/awesome-jev-typesafeJavaScript
Awesome Jev
16GitHub stars
A selective awesome list of Jev projects, integrations, and resources: 241 entries each checked to actually call Jev, admitted at a 10-star bar, and paired with hands-on reviews at mrjev.com.
Jev Guides & Articles#community#awesome-list#python
CommunityMrJev/awesome-jevPython
OMP Jev Compaction
12GitHub stars
An omp plugin that does verbatim Jev-scored context reduction: stale tool calls and results are truncated to a short head plus a recoverable note, while sticky rewrites keep the provider's prompt cache intact.
Jev Tools & CLIs#community#typescript#compaction
Communityjerryfane/omp-jev-compactionTypeScript
poorjev
10GitHub stars
An open, local-first alternative to Jev that reproduces the Choice, Score, and Noul interface on commodity zero-shot NLI models with temperature scaling and conformal abstention, and runs offline with no API key.
Jev Practices & Patterns#community#python#calibration
Communityrupeshpoojary9/poorjevPython
Jev: TypeSafe's System One Model Explained
DataCamp's explainer walks the eval tables behind System One models, from 67.8% workflow accuracy and 0% structured-output errors to the $0.042 per million token price and how to call the API.
Jev Guides & ArticlesArticle#community#article#evaluation
Community
Screening agent actions with Jev
A test report that puts Jev in front of each agent action before it runs: most attacks were caught, with almost no false positives on legitimate tool calls.
Jev Tools & CLIsPost#community#x#agents
Community
Cookbook: Function Calling
Turn natural language into typed function calls: closed-set arguments become Choice questions, optional ones become Noul questions, and 54 questions ship in one request for a trading assistant.
Jev CookbooksDocs#official#cookbook#tool-calling
Official
Cookbook: Skill Suggestion
Rank 182 agent skills in one request and re-read the top three in a second: over 488 requests, wrong skill loads fell from 16.8% to 7.3% and needless loads from 9.8% to 4.0%.
Jev CookbooksDocs#official#cookbook#agents
Official
Jev Browser
328GitHub stars
A browser-use agent where Jev picks one action per step from a page's interactive elements. Runs as an MCP server, CLI, or library and returns a step trace, screenshot, and console errors.
Jev Tools & CLIs#community#typescript#mcp
Communityjkudish/jev-browserJavaScript
Jev MCP
517GitHub stars
An MCP server exposing ten Jev judgment tools, including verify, screen, find, rerank, classify, review, and gate, each returning typed probabilities in roughly 150 to 500 ms.
Jev Tools & CLIs#community#typescript#mcp
Communityjkudish/jev-mcpJavaScript
Typesafe MCP
349GitHub stars
A single-binary Go MCP server exposing one evaluate tool for noul, choice, and score questions, with one-command registration for Claude Code, Claude Desktop, and Codex.
Jev Tools & CLIs#community#go#mcp
Communityitsmostafa/typesafe-mcpGo
Building with Jev
155GitHub stars
An agent skill for writing and improving programs that call Jev: question design, state structure, answer composition, confidence thresholds, and how to diagnose a question that keeps coming back wrong.
Jev Practices & Patterns#community#skills#claude-code
Communitydbreunig/building-with-jev-skill
Advocaat
96GitHub stars
A small TypeScript client for asking typed questions about your data: one ask call mixes yes/no, choice, and score questions and returns probabilities, selected options, and confidences.
Jev Repos & SDKs#community#typescript#sdk
Communitypithings/advocaatTypeScript
SkillRanker
132GitHub stars
A Rust CLI that ranks agent skills for the next step with a two-stage Jev pass plus lexical prefiltering, with Claude Code hooks, a TUI, abstention, and --why-not explanations.
Jev Tools & CLIs#community#rust#cli
CommunityDicklesworthstone/skillrankerRust
Building a Harness with Jev (LangChain)
LangChain's langchain-typesafe integration exposes Jev as a TypeSafeClassifier plus experimental model-routing and auto-mode middleware that screens risky tool calls before execution.
Jev Tools & CLIsArticle#community#integration#python
Community
Fast Jev Compaction Demo
Tamara's demo of fast-jev-compaction for Claude Code: instead of summarizing context, Jev scores every tool call and drops the irrelevant ones, with a video of it running.
Jev Tools & CLIsVideo#community#x#video
Community
Claude Context Cut from 1M to 86K
Alex Volkov reports that a Jev-powered Claude plugin reviewing unnecessary tool calls cut a session from nearly 1M to 86K tokens in about one second, with the install prompt in the post.
Jev Tools & CLIsPost#community#x#claude
Community
On Jev-Scored Compaction: A Critique
A widely read counterpoint to Jev-based context compaction: compaction is reconstruction, not filtering, and scoring tool calls to drop history misunderstands context management.
Jev Practices & PatternsPost#community#x#compaction
Community
typesafeai-cli
2GitHub stars
An agent-first CLI for System One: ask, rank, extract, verify, screen, find, and decide from the shell, with an installable agent skill. Published on PyPI.
Jev Tools & CLIs#community#cli#agent
Communitymaddygoround/typesafeai-cliPython
jev-mcp
62GitHub stars
An MCP server that puts Jev in the coding loop for Cursor, Codex, and other MCP clients: coding-loop checks, ranking, verification, and review tools.
Jev Tools & CLIs#community#mcp#coding-agent
Communityburnigtm/jev-mcpTypeScript
daf-jev: Composable Python Toolkit
An open Python toolkit with question builders, confidence gates, tiered routing, a concurrent corpus evaluator, calibration tooling, a CLI, and an MCP server, with published benchmarks.
Jev Repos & SDKsArticle#community#python#mcp
Community
pi-jev-auto-mode
31GitHub stars
Jev-backed auto mode for the Pi coding agent: semantically approves bash, write, and edit tool calls, and fails closed whenever a decision cannot be made.
Jev Tools & CLIs#community#coding-agent#permissions
Communityjomatsu/pi-jev-auto-modeTypeScript
Example Use Case Map
Explore TypeSafe use cases by industry and turn promising ideas into concrete software workflows.
Jev Practices & PatternsDocs#official#use-cases
Official
Agent Skill
2.7kGitHub stars
Drop-in skill for Claude Code, Codex, and other agent environments that teaches the right way to structure states and questions.
Jev Tools & CLIsDocs#official#agent#skill
Officialtypesafe-ai/skills

Start here with Jev

Featured entries for tool calling.

Fast Jev Compaction
7.6kGitHub stars
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
Communitytamaratran/fast-jev-compactionTypeScript
jevQL
14GitHub stars
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
Communitykylemclaren/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
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
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
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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