⬢github Rust · 3K ★ +2.3K since we first saw it · pushed 28 min ago · MIT
expo/exact
Write an app once. It runs natively on the web, macOS, iOS, and Linux, and an AI agent can build it, run it, see it, and test it on every one of them.
Exact is a cross-platform app runtime from the Expo team: you describe UI in Contract, a small declarative language, with logic in TypeScript or Rust. It compiles to a compact plan rendered as real DOM/CSS on web, and via a Rust layout kernel using UIKit, AppKit, or GPU drawing on iOS, macOS, and Linux—no webview, no JS bridge, and built so AI agents can build, run, screenshot, and test apps on every platform.
Why now: Freshly launched and discussed on Hacker News as a new cross-platform UI framework by the Expo team, with an agent-driven demo showing an AI building and testing an app across three platforms in ~57 minutes.
Who it is for: Developers building cross-platform apps—especially those interested in AI-agent-driven development workflows.
ai-agentsappkitcoding-agentscross-platformcssioslinuxmacosnative-appsrust
Stars over our 223 snapshots: 778 to 3K, since 2 d ago.
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