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.
The Jev Benchmark Landscape: Four Projects, Four Angles
jevbench, typesafe-ai-benchmark, jev-benchmarks and jev-rerank-bench measure Jev differently. What each one tests, what it found, and how much to trust it.
typesafe-adblock and jevfill: Form-Filling and Ad-Blocking With Jev
Two small Chrome extensions send page elements to Jev for a yes/no or best-match call: one blocks ads by asking 'is this an ad?', the other fills forms by asking 'which note matches this field?'
typesafe-computer-use and Jev-cu: Two Takes on Computer-Use Agents
Two Jev-powered computer-use agents, two different tradeoffs: OCR-and-accessibility screen reading versus text-only Codex integration. Here's what each README actually proves.
TypeSafe's Official JS and Python SDKs, Explained
typesafe-sdk-js and typesafe-sdk-python are TypeSafe's own client libraries for Jev. What each ships, how their APIs differ, and what's still undocumented.
Vertical Jev Bots: jev-chat-windows and HA-Jev
A WeChat reply assistant with offline OCR and a Home Assistant integration both use Jev for narrow, typed judgments — never auto-sending messages or controlling safety-critical devices.
A Week of Jev Game Demos: What They Actually Prove
Nine game and sim projects landed in the Jev ecosystem's first weeks — two open reimplementations, two duels, a local decision server, and four solo tick-by-tick demos. Here's what each proves.
Calibrating Jev Thresholds: jevcal, jev-benchmark and Drift Checks
Typed decisions come with probabilities, but a threshold is only useful if you've measured it. jevcal, an eval-first jev-mcp and LightJev show how to calibrate and catch drift.
One Idea, Four Agents: Jev Compaction for Codex, Pi and omp
The same Jev pruning idea now exists for Claude Code, Codex, Pi and omp. How each implementation differs, what the READMEs measure, and how thin the evidence still is.
Context GC: fast-jev-compaction, Winnow and the Pruning Pattern
Two open-source tools use Jev to decide which old tool output an agent can forget, keeping originals verbatim. How the pruning pattern works and where it can go wrong.
How to Evaluate Jev Projects Honestly: A Checklist for the Radar
166 projects use Jev, and most are tiny and unbenchmarked. Here is how to read pinned vs unreviewed entries, star counts and author-tested claims before you adopt one.
Jev-Powered Browser and Desktop Agents: What the Repos Show
jev-desktop, mobile-jev, jev-voice-browser and ego-jev use Jev to pick the next UI action. Here is what each README proves, what it discloses, and where it stops.
Jev for Search and Data: pg-jev, llama-index-jev and jev-curate
Semantic filters inside SQL, a LlamaIndex reranker and router, and a dataset sifter: three Jev projects that put typed decisions into data pipelines, with their real limits.