David Crawshaw: Agents Just Made Closed-Source Devtools Untenable — Including Claude Code

David Crawshaw (exe.dev) / Hacker News·high signalXBlueskyLinkedInCopy link

In an August 2 post that reached 634 points and 211 comments, David Crawshaw argues agents have inverted the economics of tool personalization: forking and maintaining a custom devtool used to have terrible ROI, but agents now handle the modification and upstream sync. His demo is prompting his agent Shelley to 'build meat.dev into Shelley,' folding a personal diff-cleaning tool directly into the harness. The sharp end of the argument is that plugin systems and giant config files were workarounds for pre-agent modification costs, and closed tools like Claude Code now force users into predetermined hooks that open alternatives (VS Code, Vim, Pi, Codex) don't.