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Product update

Claude Code introduces Mods for behavior and interface customization

Event time 1 independent sourceEditorial score 77/100Updated here

The short version

Anthropic introduced Claude Code Mods: TypeScript functions that change prompts, tool calls, and the interface. Mods ship in plugins for the CLI and desktop app, run with user permissions, and are not sandboxed.

What changed

Compared with instruction-based skills, Mods handle events, change the interface, and replace some built-in features.

What it means for you

Developers customizing Claude Code can use the official tutorial; organizations should also review plugin controls and load order.

Start by observing tool calls or displaying CI status before changing execution behavior. The announcement links to a tutorial and organization controls.

A Mod is executable code, not just an instruction file. The source explicitly warns about user-level access and the absence of sandboxing. Event precision is the October 1 date printed on the announcement.

Fact check

  • VerifiedMods change prompts, tool calls, and the interface, ship in plugins, and support the Claude Code CLI and desktop app.Evidence
  • VerifiedMods run with the same machine access as Claude Code and are not sandboxed.Evidence
  • VerifiedThe official comparison describes skills as instructions and Mods as event and interface handlers; some built-in features are Mods, managed through plugin controls and load order.Evidence

Coverage timeline

  1. Primary sourceAnthropic
    Customize Claude Code with mods
  2. Primary sourceAnthropic
    Mods overview - Claude Code Docs