~x-ai/grok-latest → A (3:2)

A adds a lasting UI protocol: form_template hole-filling, HtmlUiAction, and a unified POST /ui handler that reuses extracted web_post runners and lazy-expands new-thread forms—core product architecture with tests. B implements a solid Reddit broker (OAuth, rate limits, parse/map, background worker) replacing stubs, but it is an external integration plus minor noise (.env gitignore, todo), so it trails A’s foundational design impact.