[BUG] ultraplan: cannot launch remote session

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

❯ /ultraplan try plan
◇ ultraplan
⎿ Starting Claude Code on the web…

❯ ultraplan: cannot launch remote session —
The Claude GitHub app must be installed on this repository first.
https://github.com/apps/claude/installations/new

● This is definitely a bug on Ultraplan's side — the app is correctly installed. I'd suggest filing an issue at https://github.com/anthropics/claude-code/issues so the team can investigate.

Want to skip Ultraplan and just start building the service here? We have everything we need from the handout.

What Should Happen?

i am not sure, i guess ultraplan needs to start

Error Messages/Logs

❯ what exactly do i need to do?                                                                                                                                                                                                             

● 1. Open this link: https://github.com/apps/claude/installations/new
  2. Select your account (sturlan)
  3. Choose Only select repositories → pick myrepo
  4. Click Install

  Then come back and run /ultraplan again.
  
✻ Sautéed for 2s

❯ /ultraplan 
  ⎿  Usage: /ultraplan <prompt>, or include "ultraplan" anywhere
     in your prompt

     Remote plan mode with rich web editing experience.
     Runs in Claude Code on the web. When the plan is ready,
     you can execute it in the web session or send it back here.
     You can continue to work while the plan is generated remotely.

     Terms: https://code.claude.com/docs/en/claude-code-on-the-web

❯ /ultraplan try plan                                                                                                                                                                                                                       
◇ ultraplan
  ⎿  Starting Claude Code on the web…
  
❯ ultraplan: cannot launch remote session —                                                                                                                                                                                                 
  The Claude GitHub app must be installed on this repository first.                                                                                                                                                                         
  https://github.com/apps/claude/installations/new                                                                                                                                                                                          

● Still the same error — the app install likely didn't take. A few things to check:
  
  1. Go to https://github.com/settings/installations and confirm the Claude app appears there
  2. If it does, click Configure and make sure drvodom-ai-ocr is in the list of selected repositories
  3. If it doesn't appear at all, try the install link again: https://github.com/apps/claude/installations/new

  What do you see at that settings page?

✻ Cogitated for 4s
  
❯ it's installed, and it has myrepo repo                                                                                                                                                                                            

● Try running /ultraplan try plan once more — there can be a short propagation delay after app installation. If it still fails, it may be worth checking https://github.com/sturlan/drvodom-ai-ocr is accessible (not empty, has at least
  one commit) — which it is — so it should work now.

✻ Churned for 7s

❯ /ultraplan try plan again                                                                                                                                                                                                                 
◇ ultraplan
  ⎿  Starting Claude Code on the web…
  
❯ ultraplan: cannot launch remote session —                                                                                                                                                                                                 
  The Claude GitHub app must be installed on this repository first.                                                                                                                                                                         
  https://github.com/apps/claude/installations/new                                                                                                                                                                                          

● This looks like a bug — the app is installed and the repo is accessible, but Ultraplan isn't picking it up. I'd suggest reporting it at https://github.com/anthropics/claude-code/issues with these details:
  
  - Repo: sturlan/myrepo
  - App installed: yes (visible at github.com/settings/installations)
  - Error: "Claude GitHub app must be installed on this repository first"

Steps to Reproduce

try to start ultraplan from claude code CLI

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code v2.1.148

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_