Fixing code with tenx fix

Let's imagine we start with the following code:

#![allow(unused)]
fn main() {
/// Returns a vector containing the first n numbers in the Fibonacci sequence.
pub fn fibonacci(n: u64) -> Vec<u64> {
    vec![]
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_fibonacci() {
        assert_eq!(fibonacci(0), vec![]);
        assert_eq!(fibonacci(1), vec![0]);
        assert_eq!(fibonacci(2), vec![0, 1]);
        assert_eq!(fibonacci(5), vec![0, 1, 1, 2, 3]);
        assert_eq!(fibonacci(8), vec![0, 1, 1, 2, 3, 5, 8, 13]);
    }
} 
}

The fibonacci function is unimplemented so the tests will immediately fail, as we can verify with the tenx check command:

We can now ask the model to make our checks pass with tenx fix. This runs the checks on project, and sends any output from failing checks to the model. From there, the model uses the edit capability of our dialect to read the needed files to make changes. Here's what that looks like:

Note we didn't specify which files to edit (though we could have chosen to - see tenx help fix). The output of the check here was sufficient for Sonnet to be able to first ask to view the file, and then to make the edit itself.