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.
From the publisher
README & documentation
Source previewRead the project’s overview, installation instructions and usage examples. The original README is the source of truth.
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. One app.contract, the same screen on three hosts, captured by the agent driver. Softwear is a demonstration store you can generate from exact-templates: it shows Alternative Apparel's catalog, is not affiliated with that brand, and takes no real orders or payments. Exact is a cross-platform application runtime. You describe your interface in Contract, a small declarative language, and you write your data logic in TypeScript or Rust. The Contract compiler turns the interface into a compact plan. On the web, that plan becomes one ES module over a 20 KB runtime that drives the real DOM. On macOS, iOS, and Linux, a Rust runner executes the same plan, a Rust layout kernel computes every box with CSS…
Read the full README ↗ · Preview checked 2026-11-11T12:52:24.031Z
Inside the original README — Document outline
- Exact
- Contents
- Three principles
- 1. Agent native
- 2. Speed is king
- 3. Write the web, ship the platform
- How it works
- Quick start
- 1. Install the tools
- 2. Run Caltrain in the browser
- 3. Run it natively
- 4. Drive it the way an agent does
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What this repository does
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.
Repository facts
- Owner
- expo
- Primary language
- Rust
- Stars
- 4,103
- Forks
- 99
- Open issues + pull requests
- 134
- License
- MIT
- Archived
- No
- Default branch
- main
- Created
- 2026-11-02T01:29:01.000Z
- Last push
- 2026-11-14T11:59:52.000Z
Topics and intended use
Owner-supplied topics: ai-agents, appkit, coding-agents, cross-platform, css, ios, linux, macos, native-apps, rust, swift, uikit, web
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Source and freshness
Source: GitHub. Metadata observed 2026-11-14T12:25:55.323Z. Daily imports are snapshots, not real-time monitoring.
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