Breaking

Anthropic Enables Custom Plugins for Claude Code via Extensible Mods System

October 1, 2026 at 16:13 EDT

Software Dev & Coding
AI Agents

Anthropic has launched Claude Code Mods, a plugin system that lets users customize and extend the behavior of Claude Code through TypeScript function hooks. The feature, announced in September 2026 and now available in early access, gives developers granular control over how the AI assistant operates within the platform.

Claude Code · September 2026

Mods Unlock Custom AI Agent Behavior

Anthropic launches a plugin system that lets developers extend Claude Code through TypeScript function hooks, enabling prompt rewrites, permission gates, and custom UI.

Core Capability

Intercept Events

Hooks observe and modify tool calls, prompts, and renders as middleware.

Supported Platforms

CLI + Desktop

Mods run in both command-line and graphical environments.

Phase

Early Access

API subject to change; suited for experimentation and testing.

What Mods Can Do

Rewrite Prompts

Modify instructions before reaching the model.

Enforce Permissions

Approve, deny, or retry tool calls dynamically.

Redact Secrets

Hide sensitive data in output or on screen.

Draw Custom UI

Add statuslines, panes, and custom interface elements.

Key Consideration: Mods run with full agent access to files, commands, and network—same privilege level as Claude Code itself. Misconfigurations or malicious mods pose security risks.

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