Implementation:
- Added detect_approved_pending_questions() function to identify approved PRs
that have no ## Design forks section and no Q1:, Q2: comments yet.
- Modified response processing block to handle three session modes:
1. questions_phase: Resume session for processing Q&A answers
2. start_questions: Fresh session to post initial design questions
3. pitch: Original behavior for new pitch generation
- Added build_architect_prompt_for_mode() function to generate appropriate
prompts for each session mode.
- When an approved PR is detected, the agent posts initial design questions
(Q1:, Q2:, etc.) and adds the ## Design forks section, transitioning the
PR into the existing questions phase.
This fixes the issue where approved architect PRs would sit indefinitely
because the agent had no path to start the design conversation.
99d430a0c2