Anthropic opens Claude Code to developer mods

anthropic released a new mods system for claude code, essentially middleware that runs directly inside the tool. the plugin-based system lets developers change how claude code looks and works with javascript or typescript functions that hook into specific events. mods can add custom panels next to the chat, intercept tool calls, or wire up entirely new commands. anthropic provides sample mods on github and warns users to only install them from trusted sources. this affects developers who use claude code and may change how they interact with the tool.