Anthropic Releases Early Access to 'Claude Mods' for Claude Code

Anthropic has released early access to Claude Mods, allowing users to run TypeScript-based custom modules within Claude Code. This feature can be enabled by setting the CLAUDE_CODE_ENABLE_FUNCTION_HOOKS=1 environment variable.

Key Features and Use Cases of Claude Mods

• Technical Structure: Mods are TypeScript code that runs inside Claude Code, capable of listening to engine events or rendering directly to the terminal screen.
• Practical Applications: Beyond simple game demos (such as Tetris), Mods are useful for improving development workflows, including displaying PR/CI status, masking tool outputs before model input, adding in-session workflow UIs, and modifying or rejecting specific events.
• Community Ecosystem: The community is sharing catalogs of these Mods, with each Mod specifying the accessible events and verified permissions.