# Coding Rules

## Hard Constraints
- No `?`
- No `unwrap` / `expect`
- Explicit error handling only
- No `mod.rs`
- tracing obligatoire
- banned: anyhow, thiserror

## Example

match do_work() {
    Ok(v) => v,
    Err(e) => return Err(MyError::from(e)),
}