Pasted File Editor
Simon Willison prototyped a Pasted File Editor tool replicating claude.ai's large-paste-to-file-attachment behavior using Codex.
“I really like how you can paste a large volume of text into claude.ai (or the Claude desktop/mobile apps) and it will detect it as a large paste and turn it into a file attachment instead.”
Simon Willison built a small prototype tool that mimics claude.ai's UI pattern of converting large text pastes into file attachments, generated via Codex desktop. It's a minor personal tooling experiment with no significant industry implications.