codereview-skills

Six companion skills: codereview-inline (process @AI comments), codereview-clean (sweep the trail), commit-reply-review (snapshot dirty tree before the reply pass), diffity-resolve-traced and diffity-resolve-tree-traced (wrap nilbuild/diffity resolution flows and leave an @SEEN @AI:/@AI-reply: trail at every edit site), diffity-commit-resolve-traced (snapshot dirty tree before the traced diffity resolve pass).