Constant CPM_VERSION 

pub const CPM_VERSION: i64 = 3;

Version of the CPM kernel’s output semantics. Bump whenever a change alters any field of CriticalPathResult for the same input, so stored plans are recomputed on open (see plan_store). Bump also when EffortEstimator defaults change, since stored plans are recomputed with the current estimator.

• v2: synthetic __start__/__finish__ endpoints
• v3: calendar duration_hours and per-edge lag_hours