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# Code style
## Java
Run the Spotless formatter before committing. CI fails the build if
formatting drifts:
```sh
./mvnw spotless:apply
```
## Rust
Run inside `native/`:
```sh
cargo fmt
cargo clippy --all-targets -- -D warnings
```
`-D warnings` turns clippy warnings into build failures, matching CI.
## License headers
New source files need the Apache 2.0 license header. Apache RAT enforces
this during `verify` — `./mvnw verify` will fail if a tracked file is
missing the header.