[Claude Code Starts to Unpack Itself: Function Hooks Officially Launched as Mods] Beating AI News Flash: Anthropic has officially launched Claude Code Mods. This is the previously previewed Function Hooks, now officially named Mods. The underlying framework still uses Function Hooks, and a Mod is essentially a plugin that can directly modify Claude Code. Mods can alter Claude Code's behavior and interface. They can rewrite content before prompts are sent to the model, intercept, modify, or retry tool calls, handle permission requests, and even replace parts of the interface. Users can also directly instruct Claude to write a Mod, install it, and load it immediately. Anthropic has also started breaking down Claude Code's built-in features into Mods. /diff has already been migrated first, allowing users to disable it or replace it with their own version. The official plan is to continue migrating more built-in features, leaving Claude Code with only a smaller core in the end. Mods are still installed and shared via the existing Plugin system and can be used on both CLI and desktop platforms. However, Mods do not have sandbox isolation and possess the same local permissions as Claude Code itself. Anthropic recommends installing Mods only from trusted sources. [Original Link]