crabtalk-core 0.0.21

Core types and traits for the Crabtalk agent runtime
Documentation 
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//! Shared utilities for markdown-based configuration parsing.

/// Split YAML frontmatter from the body. Frontmatter is delimited by `---`.
///
/// Handles CRLF line endings and trailing whitespace on delimiter lines.
pub fn split_yaml_frontmatter(content: &str) -> anyhow::Result<(&str, &str)> {
    let content = content.trim_start();
    if !content.starts_with("---") {
        anyhow::bail!("missing YAML frontmatter delimiter (---)");
    }

    // Skip opening delimiter and its trailing newline.
    let after_first = content[3..].trim_start_matches(['\n', '\r']);

    // Scan line-by-line for the closing `---` delimiter.
    let mut pos = 0;
    for line in after_first.lines() {
        if line.trim() == "---" {
            let frontmatter = &after_first[..pos].trim_end();
            let body_start = pos + line.len();
            // Skip the newline after `---` if present.
            let body = after_first[body_start..].trim_start_matches(['\n', '\r']);
            return Ok((frontmatter, body));
        }
        pos += line.len() + 1; // +1 for the newline consumed by lines()
    }

    anyhow::bail!("missing closing YAML frontmatter delimiter (---)")
}