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# rust/
Shared Rust crates that power OpenCut across platforms (web via WASM, desktop natively).
## Adding a new crate
1. Create it under `rust/crates/`
2. Add `bridge` as a dependency
3. Annotate public functions with `#[export]`
## How `#[export]` works
```rust
use bridge::export;
#[export]
pub fn round_to_frame(time: f64, fps: f64) -> f64 {
(time * fps).round() / fps
}
```
Without the `wasm` feature, the macro is a no-op. With `--features wasm`, it expands to:
```rust
#[wasm_bindgen(js_name = "roundToFrame")]
pub fn round_to_frame(time: f64, fps: f64) -> f64 { ... }
```
Desktop uses the crates directly as Cargo dependencies.
## Testing
```bash
cargo test -p <crate>
```
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