Simon Willison releases web-edit 0.1a0 file-editing web app
Simon Willison released web-edit 0.1a0 on October 12, a Python web app for viewing and editing files in a folder, with an interface built on CodeMirror 6. He says he wanted to edit a credentials file from his phone while working through Codex Remote without round-tripping those credentials through the LLM, so he had Codex and GPT-6 Astra Extra High build the app, which is meant to run over Tailscale. A 0.1a1 release the next day added performance optimizations written by Claude Opus 5.5, based on a Python 3.15 profiling report generated by GPT-6 Astra.
The small tool illustrates the author's stated approach of having agents build a local, Tailscale-reachable utility so credentials need not pass through the model.
Release: web-edit 0.1a0
Simon Willison’s Weblog
Sponsored by: Teleport — AI agents (and sub-agents they spawn) are given the same access as humans, but they never sleep. Learn how to monitor and constrain their behavior with isolated ephemeral trusted runtimes.
12th October 2026
Release web-edit 0.1a0 — Web app for editing files in a folder
#web-edit#Codex#GPT-6 Astra#Claude Opus 5.5#CodeMirror#Tailscale