CHROME EXTENSION · 2026
Jev Tweet Radar
Scores every post on your X timeline with Jev: worth engaging, buzz, misread, AI-ish… and checks your own draft before you hit Post. Open-source Chrome extension.
About this tool
On X, the expensive part isn't reading posts, it's deciding whether to reply. Jev Tweet Radar hands that decision to Jev (TypeSafe's System One Model): each post that scrolls into view gets one request, and a few hundred milliseconds later a calibrated "worth engaging" probability plus your chosen tags appear under the text.
Highlights
- Selectable tags: buzz / flame / ignored / misread / repost-worthy / bookmark-worthy / AI-ish. Unchecked tags are never sent.
- Goal presets: grow followers / learn / excitement, or your own sentence. "Worth engaging" is judged against that goal.
- Pre-post check: your draft is judged 1.2 s after you stop typing; replies are judged together with the parent post.
- Cheap: about 300 input tokens (~$0.00001) per judgment. An hour of scrolling costs less than 10 cents.
- Trilingual UI: English / 日本語 / 中文, auto-detected from the browser.
Jev returns no rationale; probabilities are calibrated, not infallible. Post text is sent to api.typesafe.ai. Background videos (Chinese narration): Understanding Jev and What Jev Can Do.
- Platform
- GitHub (MIT)
- First Release
- 2026-09
- Type
- Manifest V3 Browser Extension
- Compatibility
- Chrome / Chromium Browsers
- Author
- Tushu
- Status
- Open source, bring your own TypeSafe API key
Source on GitHub. Load it unpacked from chrome://extensions. GitHub ↗