Breaking through the six-day stagnation on submain, we've finally hit a major milestone with four committed changes pushing Cx 0.1 over to release candidate status. A significant memory boundary audit unveiled a critical StrRef soundness bug, now resolved, and all nine hard blockers are cleared up, leaving the merge gap the last major step before declaring release.

Audit Part 2 and Type Parser Refactor

The stalled audit Part 2 is no longer a hurdle. Commit a576f20 brought this to life, touching parser.rs , semantic.rs , main.rs , runtime.rs , and adding six new matrix tests (t109 to t114). Of particular interest was a critical refactor of the type parser, moving from flat alternatives to a recursive() approach.…