Jev (TypeSafe)
45 articles in series
Fifteen articles on Jev, TypeSafe AI's System One decision model, and the open-source projects built on it — typed decisions vs free text, browser agents, difficulty routing, context compaction, code-review triage, MCP wiring, guardrails and real-time loops. Source-backed, with honest notes on what the authors measured and what nobody has independently retested.
Kev and NanoJev: Open Reimplementations of a Jev-Style Decision Head
Two open-source teams rebuilt Jev's typed decision head from scratch. Kev ships three model sizes with published accuracy numbers; NanoJev claims to beat Jev on ViZDoom at 0.6B params.
jev-search and jev-semgrep: Search and Static Analysis, Typed
Two unrelated projects share the name jev-search, plus a semantic grep called jev-semgrep. Three ways typed Jev scoring is replacing keyword matching in search and code tools.
jev-trader: A 2,000-Star Market Maker Built on Jev
jev-trader posts limit orders on a Monad spot pair every ~300ms and defaults to a dry run. Its README reports 81ms model latency and no capital at risk unless you set a private key.
jev-voice, Browser Extensions and macOS Loops
jev-voice pairs local whisper.cpp with one Jev call per spoken command; JevBrowserExt ports jev-ultrafast to a Chrome extension; jev-macos-loop drives Finder with local OCR. All three keep Jev to a single narrow decision.
Jev vs Jev: Duel and Arena Projects Built to Stress-Test It
Six small repos, all filed under Game Development on the Jev radar. Two are literal head-to-head matches, one is a local decision server, three are solo tick-by-tick demos.
jevals: An Evals Platform Built Around Typed Judges
jevals runs 40+ typed evaluation questions per agent trace for a fraction of a cent, using Jev instead of an LLM judge. Here's the architecture, the cost claims, and where it says it falls short.
Jevbridge: Bridging Jev Into Other Runtimes
Jevbridge speaks both MCP and the Agent Client Protocol, and can swap Jev for another LLM when no TypeSafe key is present. Here's what that trade-off actually costs.
More Jev Browser Agents: jev-browser-use and Its Forks
Five separately-authored projects named jev-browser or jev-browser-use, from a 415-star Codex speedup tool to a 4-star Playwright CLI. Here's what each one actually does.
n8n-nodes-typesafe-jev: Typed Decisions Inside No-Code Workflows
A small n8n community node lets no-code workflows call Jev for classification, routing and scoring. Here's what it ships, what it needs, and where it's still rough.
pi-jev vs pi-jev vs pi-typesafe: Three Takes on One Editor
Three separate extensions wire Jev into the Pi coding agent, two of them sharing a name. Here is what each actually does, and how to tell them apart before you install.
pi-warden and the Pi Guardrail Ecosystem
Five projects now put Jev between a coding agent and its tools: two built specifically for Pi, three all named jev-guard. Here's what each one actually checks, and how much evidence backs it.
simple-jev and jev-skill: The Lightweight End of the Ecosystem
simple-jev turns open LLMs into Jev-compatible classifiers, jev-skill packages 60+ scenario demos, jev-shell-history ranks your zsh history. Three small tools, three bets.