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AI Signal (@AliciaCrawoiue) on X

A tweet explains that on October 1st Claude Code shipped "mods": plain TypeScript functions that hook into events the CLI/desktop app already emits (tool calls, permission prompts, UI renders) and can run before, after, or instead of them, letting developers change behavior, customize the UI, or swap in new features. Mods ship inside plugins and are installed via /plugin. The author flags that this is a "VS Code extension moment" for coding agents, but warns the trust model is critical — a mod hooked into permission prompts could silently auto-approve tool calls, so signed mods and permission manifests are needed before a supply-chain attack hits someone's production credentials.