Function tool_version 

pub fn tool_version(
    cwd: &Path,
    gate: &TreeGate,
    deadline: Instant,
    cancel: &AtomicBool,
) -> Option<String>

The version of the tool the gate actually runs, as best it can be read without running the gate. Never touches .venv or the network on its own account; a wrapper that does (pyright’s) is bounded by deadline and cancel, like any gate run. None when it could not be read in time — the caller withholds rather than guess.