fn-18-kwn.1 Update flowctl rp to auto-open RP window via rp-cli open

fn-18-kwn.1 Update flowctl rp to auto-open RP window via rp-cli open

Description

rp-cli open <path> can now launch RepoPrompt windows programmatically. Update flowctl rp pick-window to use this when no existing window is found.

Implementation

1. Update pick_window() in flowctl.py

   def pick_window(repo_root: str) -> int:
       # Try to find existing window
       result = subprocess.run(['rp-cli', 'list-windows', '--json'], capture_output=True)
       if result.returncode == 0:
           windows = json.loads(result.stdout)
           for w in windows:
               if w.get('path') == repo_root:
                   return w['id']
   
       # No window found - open one
       result = subprocess.run(['rp-cli', 'open', repo_root, '--json'], capture_output=True)
       if result.returncode == 0:
           data = json.loads(result.stdout)
           return data['window_id']
   
       raise FlowctlError(f"Failed to open RepoPrompt: {result.stderr}")
   

2. Update error messaging

   • Remove "please open RepoPrompt first" errors
   • Add helpful error if rp-cli not installed

3. Test with Ralph

   • Verify RP review flow works without pre-opened window

Key Files

• plugins/flow-next/scripts/flowctl.py - rp subcommand implementation

Acceptance

• flowctl rp pick-window --repo-root . returns window ID (opens if needed)
• Reuses existing window if repo already open
• Clear error if rp-cli not installed
• Ralph RP reviews work without manual window setup

Done summary

TBD

Evidence

• Commits:
• Tests:
• PRs: