Cx Dev Log — 2026-04-06

Eleven days. That's how long the submain branch in the Cx project has been carrying five unmerged commits, each one addressing crucial blockers that must be cleared to keep progress visible and aligned with the actual state of the project. With no fresh language work touching the main branch, we're left staring at the growing gap between the work we've done and the work we've shown. Deep Dive into the Submain Standstill Let's get straight into it: these five commits on submain—wrapping arithmetic enforcement, Phase 10 while loop lowering, UTF-8 decision, an optional semicolon rule, and a basic test runner—represent substantial forward motion for Cx. They resolve four hard blockers, rounding out test runner capabilities, finalizing UTF-8 implementation, enforcing integer overflow checks, and simplifying syntax rules around semicolons. Delayed on submain, these updates show progress unaccounted for on main, which skews how external status pages like the roadmap at docs/frontend/ROADMAP.m