Reply composer
The bottom-of-conversation composer. Multi-line auto-grow textarea with action row, mention picker triggered by typing '@', and a primary send button. Cmd+Enter sends.
Production answer
Reply composer is a reusable Oak Flats Muffler Men UI primitive with documented states, accessibility expectations, theme behavior, and implementation evidence.
Primary CTAReview Reply composer states
Generative search brief
Reply composer: The bottom-of-conversation composer. Multi-line auto-grow textarea with action row, mention picker triggered by typing '@', and a primary send button. Cmd+Enter sends.