Customize Claude Code with Mods in TypeScript (claude.com)

Today, Claude has introduced "mods," a feature that allows developers to customize how Claude Code functions and appears using TypeScript. These small functions enable users to rewrite prompts, create new user interfaces, and add or replace built-in capabilities. Unlike previous hooks, mods can interact more dynamically with events and allow a higher degree of customization, making it easier for developers to tailor the tool to their specific needs. Mods can be created by users or generated by Claude Code itself, leading to a more personalized programming experience. The introduction of mods is significant for the AI/ML community as it empowers developers with greater control over functionality without relying solely on official updates. Mods are not sandboxed, which means they have the same machine access as Claude Code itself, emphasizing the importance of installing from trusted sources. Additionally, the functionality of existing built-in features is being transferred to the mod system, allowing users to enable or disable features based on their preferences. This shift not only enhances user control but also fosters an environment of collaboration where developers can share and stack mods, leading to an enriched ecosystem within Claude Code.