Function truncate_prompt

atomic-agent/src/record/message.rs:351–359

Truncate a prompt to the given maximum length, adding "..." if needed.

(prompt: &str, max_len: usize)

/// Truncate a prompt to the given maximum length, adding "..." if needed.
pub(crate) fn truncate_prompt(prompt: &str, max_len: usize) -> String {
    let trimmed = prompt.trim();
    if trimmed.len() <= max_len {
        trimmed.to_string()
    } else {
        let truncated: String = trimmed.chars().take(max_len.saturating_sub(3)).collect();
        format!("{}...", truncated)
    }
}