Simon Willison live-blogs DevDay, builds photo upload system with Codex then Claude Code
petrusenko_max · x · 2026-09-30
Simon Willison is live blogging OpenAI DevDay 2026 from Fort Mason, San Francisco. On the way there, he built a system for adding photos to his live blog from his phone using Codex Cloud, then switched to Claude Code for web after running into problems — a neat real-world case of building a tool with coding agents on the fly.
Related event: Simon Willison live-blogs OpenAI DevDay for fourth straight year(3 posts)→
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