Claude Code mods: customize behavior and UI with plugins

Melvin Vivas · X video post · 2026-10-02 · Open on X

Topics: AI Dev Tools & Productivity · Level: intermediate

Summary

Claude Code now supports mods. They can change how it behaves, customize the UI, or swap in your own features. Mods are written in a few lines of TypeScript, or Claude can build them for you, and they ship inside plugins installed with /plugin. The creator says Pi already offered this kind of customization.

Key points

• Claude Code mods can change agent behavior, customize the UI and swap in your own features.
• You write a mod in a few lines of TypeScript, or ask Claude to generate it.
• Mods ship inside plugins.
• Install plugins with the /plugin command in the Claude Code CLI or desktop app.
• The creator says Pi already offered similar customization.

Resources mentioned

• Claude Code · tool · code.claude.com · paid · recommended by both Bashiri Smith & Melvin Vivas
  Build agents and pipelines from the terminal; the guide's main agentic coding tool.
  Also in: Create Claude Code Plugins with /plugin-authoring (Melvin Vivas on X · notes), AI Engineer Roadmap Overview: From ML Foundations to RAG, Agents & Ops (Bashiri Smith on Facebook · notes), SkillsBento: Free Plugin Marketplace for Codex and Claude Code (Melvin Vivas on X · notes), Countering AI Sycophancy with a Devil's Advocate Plugin for Codex & Claude (Melvin Vivas on X · notes) and 101 more
• Pi · tool · x.com · free
  A customizable coding agent that can be extended through its Extensions API and connected to several model providers.
  Also in: Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Pi reaches v1.0 (Melvin Vivas on X · notes), Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), Pi Agent Council: Ask Multiple LLMs in Parallel and Compare Their Advice (Melvin Vivas on X · notes) and 39 more

Try this

• Install a Claude Code mod with /plugin in the CLI or desktop app.
• Try writing a small TypeScript mod, or ask Claude to build one for you.
• Build a Claude Code mod that customizes its UI or adds a custom feature, and package it as a plugin.