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Jev Practices & Patterns

296 curated Jev entries. How to design Jev states, questions, and confidence gates the right way, from the official patterns to the failure modes worth designing around.

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296
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  • Repos & sites199
  • Videos7
  • Posts16
  • Articles56

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All 296 Jev Practices & Patterns

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Showing 97–144 of 296 resources

4GitHub stars
OpenAI-compatible proxy that holds streamed tokens in a sliding buffer and scores the full criteria matrix before release, cutting the stream before a violating token reaches the client.
Jev Practices & Patterns#community#awesomejev#catalog-import
6GitHub stars
Provider-neutral benchmark and harness for typed System One decisions, freezing corpora, manifests, and scoring so engines are compared on identical rows across accuracy, calibration, and robustness axes.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
Research decoder that treats Jev as if it were a language model, assembling replies in code from Choice distributions over a hierarchical codebook instead of generated tokens.
Jev Practices & Patterns#community#jevbest#catalog-import
4GitHub stars
Open local classifier that reproduces a hosted Jev job-posting decision with a frozen CPU encoder plus small per-question heads, answering the same posting questions offline at zero marginal cost.
Jev Practices & Patterns#community#jevbest#catalog-import
3GitHub stars
Independent browsable field guide to Jev 1.13.0 covering 11,621 text-study requests, Snake controllers, and a 3D-city driving lab with replays, token counts, and reports.
Jev Practices & Patterns#community#jevbest#catalog-import
4GitHub stars
Design-time toolkit for using Jev from a coding agent, combining docs, a stdio MCP server, and an agent skill for decomposing judgments into Choice, Score, and Noul.
Jev Practices & Patterns#community#awesomejev#catalog-import
137GitHub stars
Unofficial operator companion showing how Jev works as a function call, with an offline lab, smart-home demo, TypeScript harness CLI, and portable agent skills.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
Semantic test matchers for Vitest and Jest where plain-English expectations become single Noul judgments, with probabilities mapped to pass, fail, or ambiguous.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
Hook-level gate for coding agents that watches tool use for grader tampering, hidden-test edits, and eval-process interference, steering toward checks that cannot be gamed.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Life-and-civilization sim where every voluntary action is a validated Jev Choice with ledger receipts, while optional LLM planners may only propose grounded intentions.
Jev Practices & Patterns#community#awesomejev#catalog-import
5GitHub stars
A CUDA-native decision engine that turns an open Qwen3.5 checkpoint into a System One endpoint with Jev's wire format, answering many typed questions per state from C and CUDA with no PyTorch at runtime.
Jev Practices & Patterns#community#awesomejev#catalog-import
8GitHub stars
A research repository that wires Jev and its open-weight counterpart Laya into a look-ahead-free quant stack as the judgment layer, then reports seven experiments including the ones that failed.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
A single-file port of jev-ultrafast that lets Jev drive an Ego Lite browser on macOS: an in-page script indexes visible controls and one typed-choice request returns both the operation and the target index.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Companion code comparing Google ADK and Microsoft Agent Framework on one Pydantic VideoTimeline schema, with the same Jev client checking every generated segment for sane captions and durations.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
Coding agent that pairs explicit SQLite-typed context chunks with a small TypeSafe judgment model, so the large generation model only sees selected context.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Reproducible benchmark asking whether Jev reads multi-clause rubrics, comparing Jev, Claude Haiku 4.5, Sonnet 5 and OpenJev across ten suites with corpora and spend published.
Jev Practices & Patterns#community#awesomejev#catalog-import
7GitHub stars
Memory admission evaluator that asks Jev three typed Choice questions on support, durability and commitment, then applies a versioned policy to recommend save, skip or defer.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Mock carrier support agent with the guardrail layer built twice behind one interface: chat-model JSON judging versus TypeSafe Jev typed questions over the same 25 rules.
Jev Practices & Patterns#community#awesomejev#catalog-import
7GitHub stars
Open-source System One scorer built on Gemma 3 270M with LoRA, where each option is scored in one batched forward pass and softmaxed into probabilities for choice, yes/no and ordered-scale questions.
Jev Practices & Patterns#community#jevbest#catalog-import
31GitHub stars
Chat client over jev-latest, which cannot generate text: the transcript becomes the state and each step is a choice over a 20,000-word dictionary, so replies are built one word at a time.
Jev Practices & Patterns#community#jevbest#catalog-import
12GitHub stars
Backtest harness that asks Jev for a BUY, SELL or HOLD call every 15 seconds on NQ L10 order-book data and trades one contract against hold, random and imbalance baselines. Runs cost money; replays of stored answers under new settings are free, and a local web app replays any mix of runs live.
Jev Practices & Patterns#community#jevbest#catalog-import
Recorded experiments on how Jev reports probability rather than whether it predicts well. On a hidden fair die it picked an option with a mean reported probability of 82.9% while accuracy stayed at 19.0% over 400 trials, and Choice lost a stated 45% versus 55% distinction in an input document.
Jev Practices & Patterns#community#jevbest#catalog-import
7GitHub stars
Python agent that runs Discriminative MCTS with Jev judging and Gemini 3.8 Flash proposing. Choice supplies action priors and branching width, Score evaluates states on a 1-10 rubric, and Noul checks execution and ends the loop at 0.85 confidence, with a local web UI for following runs.
Jev Practices & Patterns#community#jevbest#catalog-import
3GitHub stars
Plugin for Claude Code and native Codex that layers Jev-assisted task routing, evidence search, context compaction and readable tool output on top of the host, where typed judgments inform policy but the host keeps ownership of permissions and execution.
Jev Practices & Patterns#community#jevbest#catalog-import
3GitHub stars
A claim ledger for Jev that recomputes published calibration figures against their own noise floors and runs an 800-item difficulty gradient on jev-1.13.0.
Jev Practices & Patterns#community#jevbest#catalog-import
7GitHub stars
Two committed benchmarks of Jev: chess, deliberately outside its lane, and NPC addressee detection, squarely inside it, with raw requests and a playground.
Jev Practices & Patterns#community#jevbest#catalog-import
7GitHub stars
Four read-only MCP tools that rank files, cut a file down to the relevant part and pick from long lists, measured on a frozen SWE-bench Lite split.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
Python library and CLI that moves bulk semantic judgments — ticket triage, stale-file tagging, bug or question routing — out of the agent's context into typed Jev questions, with a measured comparison against an in-context control.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
A Jev demonstration that pulls live company profiles and headlines from yfinance and reads them into ranked, grounded, routed trade ideas, where every number in the UI is a typed answer from one request.
Jev Practices & Patterns#community#awesomejev#catalog-import
2GitHub stars
TypeScript chess library where Jev resolves natural-language move intent against verified legal moves, scores sharpness, strategic theme and king risk in one call, and drives persona opponents.
Jev Practices & Patterns#community#awesomejev#catalog-import
2GitHub stars
A local chess workbench for measuring Jev as a move chooser: the code enumerates legal moves with chess.js, Jev picks from them, and Stockfish grades every pick without its evaluations reaching the model.
Jev Practices & Patterns#community#awesomejev#catalog-import
25GitHub stars
A calibrated tool-call firewall for coding agents: seven typed risk questions plus one question about whether the task authorized the call decide whether a Bash, Write or MCP action runs, asks, or is denied.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
A TypeScript starter for the layer around the model: decision contracts, confidence thresholds that route to auto, fallback or human review, deterministic mock providers, and an offline evaluation harness.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Rust event bus where routing is a judgment call: one event plus one typed question per subscription goes to a Jev judge, and the calibrated probabilities decide drop, review or deliver.
Jev Practices & Patterns#community#awesomejev#catalog-import
2GitHub stars
Python CLI that sends each document's text extract to a Jev Choice question and files the file into a matching category folder, with a local laya backend available for offline runs.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
Framework-agnostic guard layer that puts Jev in front of an agent's tool calls: a Choice risk tier, a Noul destructiveness check and a Score blast radius decide allow, deny or ask.
Jev Practices & Patterns#community#awesomejev#catalog-import
Trading engine for Polymarket's five-minute Bitcoin up-or-down market: code computes P(Up) from a Chainlink feed, and Jev contributes a regime score plus vetoes on anomalous windows and direction.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Single-tool MCP server for Jev: send state plus a map of noul, choice or score questions to evaluate and get typed answers with probabilities and confidence back.
Jev Practices & Patterns#community#awesomejev#catalog-import
RubyLLM provider that turns typed questions — noul, choice and score — into calibrated answers with probabilities, confidence and per-call cost, and adds reranking through RubyLLM.rerank.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Python MCP server exposing Jev's three official question types plus compare, verify and batch classify, with an installer subcommand that writes the client config and a measured cost per call.
Jev Practices & Patterns#community#awesomejev#catalog-import
1GitHub stars
An open-weight Jev-class lab: a candidate-logit scorer that turns state plus a bounded rubric into calibrated probabilities per option in a single forward pass, with no generation and no parsing.
Jev Practices & Patterns#community#awesomejev#catalog-import
2GitHub stars
A Turkish chat toy that answers every message with one of five fixed phrases, using Jev as an evaluation model so the five-word limit is enforced by the type system rather than by prompting.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
A DSH plugin, published to npm, that registers one agent tool, jev_decide, so a coding agent can ask TypeSafe's Jev a typed question and get a calibrated probability instead of guessing from intuition.
Jev Practices & Patterns#community#awesomejev#catalog-import
3GitHub stars
Grades the coding agent sessions already sitting on your disk. Jevalyzer reads Claude Code, Codex CLI, opencode, Gemini CLI and Antigravity transcripts, scores each exchange, and renders an interactive HTML report or terminal dashboard.
Jev Practices & Patterns#community#awesomejev#catalog-import
2GitHub stars
Unfold, a depth-crawling research agent that routes every per-page decision through Jev while a general model is called only twice per run. Pages fan out, get triaged and judged one at a time, and the survivors converge into a cited report.
Jev Practices & Patterns#community#awesomejev#catalog-import
4GitHub stars
A TypeScript framework that puts a System 1 decision layer in front of agent micro-decisions, shipped as a Claude Code plugin, an MCP server and a CLI, with an offline simulator.
Jev Practices & Patterns#community#awesomejev#catalog-import
17GitHub stars
A market decision loop that feeds simulated stock, crypto and meme states to Jev or a local engine, then gates each answer. Execution is paper only and there is no live flag.
Jev Practices & Patterns#community#awesomejev#catalog-import
2GitHub stars
A PAVE app and CLI for typed decisions (choice, score and noul) with calibrated probabilities, four providers including a local engine, and eval and calibrate commands.
Jev Practices & Patterns#community#awesomejev#catalog-import

Index of all 296 entries

Start here with the Jev AI model

Featured entries in practices & patterns.

The box question type: one bounding box per question, returned as four edges that are fractions of the image, plus confidence, with no criteria field and no not-found value.
Jev Practices & PatternsDocs#official#docs#vision
Official
Published evaluations of four automation workflows, security incidents, agent trace observability, invoice processing, and customer service, comparing Jev and frontier LLMs as structured workflows versus single prompts.
Jev Practices & PatternsDocs#official#benchmarks#evaluation
Official
9.3kGitHub stars
Apache-licensed, locally runnable Jev-style decision models (0.8B, 4B, 9B on Qwen3.5) with released weights, training code, a System One-compatible server, frozen eval suites, and a playground.
Jev Practices & Patterns#community#python#open-models

Jev AI model articles

Original guides that go deeper on Jev practices & patterns.

Jev's compaction tools keep or drop tool calls instead of summarizing them — the thresholds they fire at, the savings they report, and why 1.14's opt-in 262k context doesn't settle the choice.
Jev Practices & Patterns#compaction#long-context#coding-agents
Read article
Per-tick buy/sell calls on Monad, a five-sleeve Hyperliquid desk, Nifty-50 rankers, and Polymarket confidence gates: how the catalog's trading repos wire Jev in without asking it to predict prices.
Jev Practices & Patterns#trading#markets#gates
Read article
How the box question type turns a crop into a decision: four fractional edges, a presence Noul for missing targets, the cut-off problem, and two patterns worth building.
Jev Practices & Patterns#vision#box#patterns
Read article

From the Jev community

Watch walkthroughs, read the threads, and see what builders are posting.

YouTube: A podcast segment on TypeSafe AI, its $40M raise, and the Jevons paradox behind the name.

YouTube: Gary Explains the catch: Jev understands natural language but answers with structured values and confidence.

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

Hacker News: Pipeable onesie CLI with shell-safety exit codes and a calibrate mode over labelled commands.

frodikarlsson3 pointsShow HN: onesie – An expressive Unix-pipeable CLI for System One models like JevRead the thread on Hacker News

Hacker News: Spoken-language learning with video scenes branching on TypeSafe Jev.

j_rcht1 pointShow HN: Worklaude – learn by speaking; video scenes branch on TypeSafe JEVRead the thread on Hacker News

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