I was working on a project from my phone using Codex Remote when I found myself wanting to edit a credentials file without round-tripping those credentials through the LLM itself.
So… I had Codex and GPT-6 Astra Extra High build this Python web app which provides a web UI for viewing and editing files in a folder. It’s intended to be run over Tailscale, so I can have an agent start this running and then edit files via my Tailscale network directly from my phone.
Here’s the interface for browsing files in a folder:
Editing uses CodeMirror 6 – I was going to use Monaco but that still doesn’t have a great mobile experience yet.