1. The Production Bottleneck
Agent evaluation often combines trace collection, rubric interpretation and release decisions in an opaque judge prompt. Without a fixed rubric and known labels, a score can look precise while remaining hard to reproduce.
2. Architecture Comparison: Without vs With Jev
A paragraph of feedback is difficult to aggregate into a stable release gate.
Missing tool results, environment state or task criteria make comparisons misleading.
Borderline runs may be auto-passed even when they need human review.
Represent pass, review and fail outcomes as explicit application states.
Keep the source events and criteria alongside each score.
Do not treat a probability or score as proof when labels are uncertain.
3. Execution Micro-Flow
How state flows through the bounded decision layer during live agent execution:
4. Practical Engineering Trade-offs
✓Deploy This Pattern When:
- Tasks have observable success criteria
- Traces can be replayed under known conditions
- Scores are used for triage rather than presented as universal truth
⚠Avoid Or Re-evaluate When:
- Subjective creative quality without an agreed rubric
- Missing ground truth or environment state
- Using one judge as the only safety or release control
5. Sourced Community Builds
130 ImplementationsInternal Link Tool for Up to 500 Pages
An internal-link tool using Jev to classify and select links, with CSV or JSON export.
YC Indexor - 6,000+ Startup Semantic Query Engine
Natural-language search across more than 6,000 Y Combinator startups using Jev.
Slay the Spire 2 AI Copilot & Card Evaluator
A Slay the Spire 2 gameplay demo using Jev for fast action decisions.
Metaview Candidate Sourcing Agents
Metaview's CTO reports using Jev across its agents to speed up candidate searches.
Exa Live Web Context for Jev
A live demo that compares Jev's typed answer with and without retrieved web evidence.
Agent Trace Observability
A TypeSafe workflow that triages completed agent runs for review, bugs, or on-call escalation.
Jev MCP
Eleven typed Jev judgment tools exposed through MCP for verification, screening, routing and review.
Instant Context Compaction
A community demonstration of using Jev to score which coding-agent context should be kept, reviewed, or dropped.
Wikiracing Fast Navigation
An official benchmark demonstrating Jev selecting optimal Wikipedia links in real time to reach target concepts.
Firehose Stream Judge
Filters live social firehoses post-by-post at $0.00003 per item, triaging high-value signals for deep analysis.
Pi Context Curator
A Pi extension that asks Jev which context units remain essential before an LLM call.
Jev Review (MCP Plugin)
An MCP plugin that scores and critiques coding agent output during active iteration loops.
DiffJury
Evaluates public PR links to provide instant safe-to-merge or review-required verdicts.
Jev on WebMCP Benchmark
Solved 49 of 49 benchmark tasks at 112× lower model cost by combining Jev tool selection with fast LLMs.
Compact Adviser
Uses Jev to recommend whether the current agent session is safe to compact.
Jev Review Action
A GitHub Action that applies typed Jev judgments to PR or catalog evidence.
Jev MCP Coding Loop
A local MCP server exposing typed Jev judgments to coding agents.
Triage across 1,500 emails
this model is actually insane at email classification
jev-e2e
JEV is changes the world of E2E testing!
Post scoring with SuperX
Jev + SuperX = virality solved ✅
724 competitor ads, broken down
jev is INSANE.
700 leads scored in 40 seconds
JEV is INSANE.
3,282 posts, eight questions each
I gave Jev 3,282 of my X posts across 100M views and asked it to find what actua
The X algorithm, rebuilt with Jev
rebuilt the X algorithm with Jev
Live viral post analyzer
Just created this with Jev by @typesafeai. A live viral post analyzer. As soon a
Jev + Claude Code: the cheapest agentic loop yet
Decides whether to re-read files, run tests, or commit changes.
Jev full tutorial: 3 prototypes built live
Scores relevance and routes between local voice input and browser execution.
LogJev
An open-source Jev-style decision layer that accepts text, images, or audio and returns bounded choices or scores.
Token Saver
A Codex workflow that delegates bounded work and uses Jev Context to select relevant source excerpts before the main agent reads them.
fast-jev-codex
A Codex plugin that scores tool history and restores verbatim context after compaction.
NewsJack
A news-intelligence workflow that uses Jev to triage stories before expensive brand-specific synthesis.
MatchCN
Semantic component search for coding agents, using Jev probabilities to rank existing UI components before generation.
Rolewise Resume Matching
A resume-to-job matching demo that reduces each resume–job pair to one bounded suitability decision.
Jev Benchmark
A community benchmark project for testing Jev as a guardrail over risky agent tool calls.
JevBenchmarkLab
An open benchmark harness for testing Jev decision consistency, adversarial failures, option-order bias, and latency.
Massively Parallel Adversarial Browser Testing
A high-concurrency headless browser adversarial test suite testing web releases with bounded Jev DOM navigation.
Jev Fast PR Reviewer (6 Real PRs)
Sub-second pull request evaluation running on 6 real repositories, triaging diff syntax and risk before human merge.
Realtime Sales Negotiation Copilot
A live sales assistant that processes audio streams every 4 seconds, predicting the next optimal tactical objection response.
Jev Vision Boundary & Limitations Breakdown
A short critical post arguing that Jev does not directly read image pixels.
Why I Couldn't Build Jev at OpenAI: Diogo Almeida
TypeSafe Co-founder & CEO Diogo Almeida explains why post-training on generative LLMs fails on agent loops and how RLCD trains System 1.
What's NEXT #9: Smaller AI, Local Models & Jev
A deep discussion on why enterprise architectures are slimming down from heavyweight LLMs to fast specialized decision nodes.
Live Sales Role Play & Dynamic Objection Triage
A sales training and live role play agent that categorizes customer objections in real time to trigger battle cards.
Shengkun Ye Jev for SEO Workflow
Monid connects Jev to 2,000 tools, showing lead scoring, SEO internal links, Reddit filtering and other uses.
Hamon Paul Jev for SEO Workflow
An SEO/GEO agent cost case; the author claims the cost of one client task fell from about $250 to $25.
Borja Fatjo Jev for SEO Workflow
An internal-link analysis test: the author says 586 pages took 45.1 seconds and produced 584 link suggestions, and compares Claude's results and cost.
Ira Bodnar’s Ryze AI SEO/GEO workflows
Seven author-described SEO/GEO decisions, from page changes to internal links and draft review.
Ira Bukht Jev for SEO Workflow
Describes an SEO/GEO audit-and-fix workflow and claims about 90% lower cost; this is the project's own claim.
VengeonsP Jev for SEO Workflow
An introduction to a French SEO automation guide: deciding internal links, standalone keyword pages, and whether to update or merge content.
AskOkara Jev for SEO Workflow
An overview of Okara's six agents using Jev for marketing and SEO workflows, including opportunity discovery and AI citation analysis.
0Gdao Jev for SEO Workflow
An e-commerce product-screening case: Jev judges brand fit, saturation and next action, and winning products are handed to SEO and other agents.
Shann Holmberg Jev for SEO Workflow
Explains that Jev can be used to review SEO articles and relays TypeSafe's speed and cost test figures.
Shann Holmberg Jev for SEO Workflow
A collection of marketing workflows: reviewing drafts, ads, creative briefs and SEO priorities against reference material.
hityyhz Jev for SEO Workflow
Relays claims of lower SEO/GEO cost and faster processing, listing steps such as Search Console and AI citation analysis.
thekuchh Jev for SEO Workflow
Reshares an SEO/GEO audit cost case, mentioning Ryze AI and the MCP/Claude Connector.
hw40 Jev for SEO Workflow
Shares an article about building an SEO tool with Jev; the title says it covers testing, failures and the launch.
tetsu_tetsu333 Jev for SEO Workflow
A Japanese internal-link analysis tool case: the author says analyzing 100 articles cost 78 yen, and explains the candidate pre-filter and Jev judgment flow.
0xPascual Jev for SEO Workflow
Explains why structural SEO/GEO checks suit classification and routing, and repeats the claim of cost falling from about $250 to $25.
RoundtableSpace Jev for SEO Workflow
A list of marketing workflows, including SEO prioritization, internal-link checks and content topic decisions.
Javed Khatri Jev for SEO Workflow
Promotes an SEO article covering internal links, keyword cannibalization, content audits, search intent and AI visibility.
Jonathimer Jev for SEO Workflow
Discusses keyword intent classification, page-type selection, content-update triage, backlink lead screening and programmatic-page QA.
Hey Himandar Jev for SEO Workflow
Shares an article on testing Jev across 801 pages; the summary says it took 57 seconds and cost $0.06, and the author says it was actually tested.
Eric Siu Jev for SEO Workflow
A walkthrough of several agents using Jev, including SEO publishing decisions, evidence checks and the steps that still need human judgment.
700 live ads in 40 seconds
A marketer scanned more than 700 live ads with Jev for four cents.
723 ads, 30 personas, 22 cents
A scroll-or-stop focus group run entirely as Jev decisions.
App Store keywords from the real competition
Jev drops the lookalikes before they pollute the keyword set.
askjev.ai
Ask Jev anything. It won’t answer, it will judge.
call-coach-ai
A sales-call coach where Jev scores what was said.
Clarity Judge
Writing checked on separate named axes, each with its own verdict.
clay-jev-people-ranker
Lead scoring in Clay, ranked by Jev instead of a prompt.
A shortlist from a competitor swipe file
Ads broken down by hook, angle, offer and format.
A 26-sheet plan set in 2.9 seconds
Civil and building plan sheets classified for half a cent.
crush-monitor
Reads a WeChat thread and scores emotion, intent and reply quality.
Classify rows in DuckDB
Hamilton Ulmer’s DuckDB extension: Jev classifies the rows of any table or file.
EmbodiedJev
A MuJoCo workbench for robot decisions, with Jev in the loop.
Every’s editorial vibe check
37 documents, 21 questions each, 1,709 judgments for under a cent.
Which exam questions come back
80 real exam questions and 297 practice ones, ranked in 80 seconds.
Jev Anti-Spam Bot
A Telegram bot that deletes only the spam Jev is sure about.
Jev Detector
An AI slop detector built on Jev, scanning about 10,000 words in 2 seconds.
jev-job-hunter
A job crawler that finds the Careers page and scores each role against your profile.
Jev Moderation Bot
A Discord moderation bot with Jev making the calls.
Jev PR Labeler
GitHub PR labels chosen by Jev, with size measured as scope, not lines.
jev-pruner
Trims long Bash output with Jev before Claude reads it.
Jev Reviewer
Systematic-review data from trial reports, every answer a verbatim quote.
jev-seo
An agent-first SEO and GEO CLI in Rust, with DuckDuckGo and Jev.
jevmod
Moderation with a probability per category and thresholds you set.
Search and tagging on keep.md
Jev on Cloudflare Workers, tested against keep.md’s current search.
LinkedIn NoSlop
A Chrome extension that blurs low-value LinkedIn posts.
A local Jev
A Jev-style model running locally, with room to get faster.
1,891 ads in 19 seconds
A whole brand ad library, labelled by funnel stage and style.
Notra
Turns your work into content, with Jev classifiers for GEO.
openjev on Qwen 4B
An MLP trained on top of Qwen 4B that works like Jev.
openjev-sglang
A public Jev-compatible API on an open model: 64 tasks in under a second.
OpenRouter’s Ori Eval
Jev judged a 30-way labelling task faster than every model tested.
Which outreach signals book demos
Jev read thousands of outreach messages and found the signals that booked demos.
An A/B test against 4,000 personas
Two launch tweets, voted on by survey respondents, in twelve seconds.
pi-jev-compaction
Automatic context clearing for Pi, without losing the conversation.
RoboJEV
Two-stage Jev control of a Franka Panda arm in MuJoCo.
Sniff Test
A prose linter for AI writing tells: regex rules plus Jev for judgment.
ST-jeved
A SillyTavern extension that measures each reply before it lands.
talkr
Speak for 30 seconds, and Jev scores the pauses and filler words.
taste-lint
Catches AI slop in a diff before it ships.
tenbin
Split a judgment into Choice, Score and Noul, lint it, then measure it.
Tocsin
22.8M log lines grouped into patterns, then one question each.
TypeSafe Typewriter
Sixteen judgments about your text, asked again on every keystroke.
24,000 Hacker News posts in two minutes
Jev on the Venice API, sorting a day of Hacker News into 12 buckets.
eve
Vercel’s open agent framework, with Jev as its default evaluate model.
100,000 viral posts in 20.4 seconds
Fourteen yes-or-no calls per post, for 67 cents.
Jev for content marketing
Jev watches every video in your niche and judges it before you see it.
A visual reference finder
One prompt, 100 images from Cosmos, NASA and The Met.
winnow
A context sieve for Claude Code: Jev judges each tool result before it lands.
1,315 posts across eight dimensions
A dashboard that labels a post archive for about nine cents.
Breaking, golden nugget, or slop
Nate Herk tags his X feed in real time with three labels.
jev-curate - High-Throughput Dataset Sifter in Rust
High-throughput synthetic and pretraining dataset sifter for TypeSafe Jev.
jevmeter - Live Video Sentiment & Perspective Scoring Overlay
Scores statements in video transcripts sentence-by-sentence and renders a live meter edit.
SemIf - Direct Choice Probability Extraction from Open Models
Independent research reading choice probabilities directly from open model logits.
ReplyNodes - SaaS Website Messaging & Clarity Audit with Jev
Audits SaaS landing pages for product clarity, target audience fit, and conversion triggers.
Paper Trellis - Scientific Citation Validation with Jev
Verifies whether cited papers actually support the claims made in academic text.
JevSEO
An open-source SEO, AEO and GEO auditor that separates fixed rules from Jev judgments.
Stencil QA Agent
A QA loop where Jev selects browser actions while a frontier model plans and vision verifies.
Warden Personal Email Assistant
A personal assistant that uses Jev to classify email work and trigger proactive analytics.
AI Assistant Visibility Audit with Jev
A page-scoring workflow that asks whether an AI assistant can find the answer.
Jev SEO Audit by Daniel Agrici
A Claude Code skill and CLI that audits a live site, keeps rule checks in code, and uses Jev for typed page judgments.
Hotel Review Filtering with Jev
Compare hotels by the review details that matter to you: Wi-Fi and noise.
Jev and Claude: Workflow Architecture PDF Overview
A community overview of pairing Jev decisions with a generative model.
Personal Feed Filtering with Jev
Turn a noisy social feed into a shortlist of posts worth reading.
Meta Ad Landing Page Classification with Jev
See what page types, offers and sales language competitors use.
Competitor Ad Scoring with Opus and Jev
Shortlist advertising ideas with explicit criteria before creating variants.
Reconstruct an Incident Timeline with Jev
Start with a confirmed malicious event and review which related activity belongs to the same incident.
Review Data Questions and SQL Answers with Jev
Ask a SQLite question and review the generated SQL and its evidence.
Find Answer Passages on a Web Page with Jev
Ask a page a question and jump to passages that answer it.