On-demand clarity-refactor pass — make code self-explanatory by structure (rename, extract, restructure, re-layout) and delete the comments that structure makes redundant. Behaviour-preserving; edits a diff. Use when the user says "/clarify", "make this self-explanatory", "clean up the names/structure", or wants a readability pass on changed code. Distinct from /simplify, which may change behaviour to reduce or generalise code — /clarify never changes behaviour.
