Function handle 

pub fn handle(
    action: &str,
    agent_type: Option<&str>,
    role: Option<&str>,
    project_root: &str,
    current_agent_id: Option<&str>,
    message: Option<&str>,
    category: Option<&str>,
    to_agent: Option<&str>,
    status: Option<&str>,
    privacy: Option<&str>,
    priority: Option<&str>,
    _ttl_hours: Option<u64>,
    format: Option<&str>,
    write: bool,
    filename: Option<&str>,
) -> String