Extensions That Rewrite the Core Won't Take the Whole Session Down When They Break — Claude Code v2.1.289 Adds a "Firewall" to the Door It Just Opened
Claude Code v2.1.289 shipped on October 3. It introduces isolation so that "Mods"—extensions that run inside the core—no longer take the whole session down when they break mid-render, and it fixes a gap where dangerous commands hidden behind environment variables slipped past permission rules. It ad
