Constant DEV_PREFLIGHT_CACHE_FILE 

pub const DEV_PREFLIGHT_CACHE_FILE: &'static str;

Cache file for mecha10 dev’s project-level Python dependency preflight gate - see handlers/dev/ops/preflight.rs in the mecha10-cli crate. Purely a speed optimization: a missing or stale-and-discarded cache always falls back to a real scan, so nothing about correctness depends on this file existing or being fresh.