Claude Code opens its Mods mechanism, and official features are built on it
Mods shipping by default means Claude Code now hands interface and command interception to third parties, widening both the ecosystem and the security surface.
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Claude Code's Mods customization mechanism entered the official changelog on October 1 and is enabled by default, according to Geekpark.
A mod is a TypeScript function running inside a plugin: it can reshape the interface, intercept commands before execution, and even route requests to another model. Anthropic disclosed that its own /diff panel and AGENTS.md support are built with the same mechanism, with source code and tests public in the repository.
Openness has a price: the official documentation states that mods carry the same machine access as Claude Code itself, and the code is written by publishers, not Anthropic. The directory currently offers no revenue share, so what keeps developers building long term remains an open question.