- [ ] Baselines captured (loop/strlen/box), median/avg recorded
- [ ] VM stats correlated (inst/compare/branch)
- [ ] Structural optimizations applied (const/temps dedupe)
- [ ] Re-measure after each change (no behavior change)
- [ ] EXE canaries remain PASS (loop/print/strlen FAST)
- [ ] README.ja/quick guides updated when toggles affect usage
