Anthropic Previews Function Hooks: Claude Code Plugin Can Directly Modify Interfaces

Beating AI News Flash: Anthropic is testing a new extension mechanism for Claude Code called Function Hooks, which is not yet live. It allows plugins to integrate directly with Claude Code via TypeScript functions, and even modify React interface components, display content, and interactions. Existing Hooks primarily trigger commands, HTTP requests, MCP, Prompts, or sub-agents when specific events occur. Function Hooks operate similarly to middleware in Express or Koa, enabling multiple plugins to be nested in layers. Plugins execute operations via a controlled `$` object, and administrators can revoke certain capabilities, preventing subsequent plugins from accessing them. A Hook can also monitor all events and operations issued by plugins via the `$` object, enabling unified audit logging. The biggest change is that Claude Code plugins now have capabilities extending into the interface and interaction layers. In official demos, Claude can generate a plugin with a single prompt, automatically redacting sensitive information like passwords before tool outputs are sent to the model. Another plugin can directly modify the display of Claude Code Desktop, hiding sensitive content until the user hovers over it.