A regenerate response button is present

AI responses are non-deterministic and fail in soft ways all the time — hallucinations, cut-off streams, refusals on benign prompts, partial answers that drift off topic. Without a regenerate button the only recovery is to retype the prompt verbatim, which users will not do; they will instead give up on the answer or, worse, act on the bad one. Regenerate is the standard recovery affordance established by every reference chat product in the category.

In src/components/chat/MessageBubble.tsx, render a regenerate button on the last assistant message wired to reload() from useChat (or a custom resubmit of the last user message). In error states, promote it to the primary recovery action with a "Try again" label.

{isLastAssistantMessage && !isLoading && (
  <Button onClick={reload} variant="ghost" size="sm">
    <RotateCcw className="h-4 w-4 mr-1" /> Regenerate
  </Button>
)}

• ID: ai-chat-visibility.error-handling.regenerate-response-button

• Severity: high

• What to look for: Count all regeneration/retry mechanisms: reload() from useChat, custom retry logic, retry buttons on error states. Check whether AI message components have a regenerate or retry button. In the Vercel AI SDK, useChat provides a reload() function that re-sends the last message. Look for a retry or regenerate icon (circular arrows) on completed AI messages, or an error state that shows a "Try again" button. The button should appear on the last AI message only.

• Pass criteria: The most recent AI response has a regenerate/retry button. After an error, a "Try again" button is visible. Clicking it re-submits the last user message and replaces the last AI response. At least 1 retry mechanism must be present.

• Fail criteria: No regenerate or retry mechanism exists. Users who receive a bad, incomplete, or error response must manually retype their message to get a new response.

• Skip (N/A) when: No chat interface detected. Signal: same as response-streaming-progressive.

• Detail on fail: "No regenerate button found on AI messages; users cannot retry failed or unsatisfactory responses without manually re-entering their message"

• Remediation: In your message component at src/components/chat/MessageBubble.tsx, add a regenerate button:

  {isLastAssistantMessage && !isLoading && (
    <Button onClick={reload} variant="ghost" size="sm">
      <RotateCcw className="h-4 w-4 mr-1" /> Regenerate
    </Button>
  )}
  

  In error states, make it the primary recovery action with clear "Try again" label.