How AI Chat Agents Silently Fail Keyboard and Screen Reader Users During Clarifying Prompts

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A developer discovered a critical accessibility gap when a browser-based AI agent rendered a clarifying question card mid-stream without shifting keyboard focus or making an audible announcement. Because focus remained in the composer textarea and the card was injected outside the tab order, keyboard and screen reader users never received the agent's question. VoiceOver continued reading leftover streaming tokens, effectively drowning out the new interactive element. The author argues the root cause is a missing turn-taking state — specifically, chat interfaces rarely distinguish between 'streaming' and 'awaiting user input' as separate UI states. The proposed fix involves a deliberate focus handoff to the clarifying card's fieldset and a single announcement when the awaiting_user state is entered, rather than adding more ARIA live-region noise.

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