Plan mode

Microsoft has announced it is ending support for Internet Explorer mode in its Edge browser, retiring the compatibility feature that let businesses run legacy websites built for the old browser. The move pushes organisations still relying on IE-only applications to migrate to modern standards, and observers are weighing what it means for enterprises that have delayed upgrading their systems.

The phrase 'Plan mode is dead' is spreading on Hacker News, attached to a blog post by Aymann Nadeem. Plan mode is a feature in AI coding tools, notably Claude Code, that lets the model sketch an approach before writing code. The post argues this way of working with AI assistants has run its course, apparently because newer agent capabilities make upfront planning less necessary. Commenters on the thread are debating the claim and what it means for developer workflows, though the full reasons are not clear from the snippet alone.