Input Box: Prompt Optimization via Sub-Thread Discussion

[crazygo]

Summary

Add a prompt optimization feature to the input box that allows users to refine a prompt through discussion in a sub-thread, then send the finalized result back to the originating area.

Motivation

Users often want to iteratively improve a prompt before sending it. A dedicated sub-thread discussion flow — scoped to a single message — provides a structured way to collaborate on prompt quality without polluting the main conversation.

Proposed Behavior

1. Open sub-thread for prompt discussion

   • From any message input area, users can open a sub-thread specifically for refining the current prompt.
   • The sub-thread context is tied to the originating area (main area or a parent sub-thread).

2. Source tracking

   • Main area → Sub-thread A: After discussion, the finalized prompt is sent back to the main area.
   • Sub-thread A → Sub-thread B: After discussion, the finalized prompt is sent back to Sub-thread A.
   • In general: always return the result to the direct parent of the sub-thread where the discussion took place.

3. Confirm and send back

   • When the user finishes refining the prompt in the sub-thread, a "Use this prompt" or similar action delivers the result to the source input box.
   • The source input box is populated with the optimized prompt so the user can review and send it.

Acceptance Criteria

• A prompt optimization entry point is visible in the input box UI.
• Opening it creates a sub-thread scoped to the current message context.
• The sub-thread clearly indicates which area it will return the result to.
• Confirming the optimized prompt closes/collapses the sub-thread and populates the parent input box.
• Nesting is handled correctly: Sub-thread B returns to Sub-thread A, not to the main area.
• The feature does not disrupt normal message sending behavior.

Open Questions

• Should the sub-thread persist after the optimized prompt is sent back, or be discarded?
• What is the maximum nesting depth for prompt optimization sub-threads?
• Should there be a way to cancel and discard the sub-thread discussion without affecting the parent?