Function part_of 

pub fn part_of(
    name: &str,
    arguments: &Value,
    result: &Value,
    turn: u32,
    tool: &str,
    intent: impl Fn(&str) -> bool,
) -> Option<Part>

The part a tool result is, if it counts: a read of one of the person’s committed intent files (the spec, the plan, the tasks, the constitution — intent says which) does not, nor does an empty result. tool is the source (tool://fs/read_file); a read is named by its path.