1pub trait LanguageModel {
 2    fn name(&self) -> String;
 3    fn count_tokens(&self, content: &str) -> anyhow::Result<usize>;
 4    fn truncate(
 5        &self,
 6        content: &str,
 7        length: usize,
 8        direction: TruncationDirection,
 9    ) -> anyhow::Result<String>;
10    fn capacity(&self) -> anyhow::Result<usize>;
11}