~x-ai/grok-latest → A (2:1)

A adds lasting UI architecture: form_template hole-filling, HtmlUiAction, and a unified POST /ui handler that shares web_post run_* paths and enables lazy new-thread morphs—not mere churn. B is valuable (path types moved into slug-types with GardenItemUrl/ForumThreadUrl), but it largely relocates and retypes existing string helpers rather than introducing comparable new product capability.