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Claude Code Launches mods Plugin System: Rewrite Behavior and Interface with TypeScript — Claude Code plugin · ClaudeMods

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Explore this Claude Code plugin on ClaudeMods and review its source and permissions. Claude Code adds mods functionality, allowing customization of behavior and interface with a few lines of TypeScript, installed as plugins via /plugin, built on hooks; Anthropic says /diff and AGENTS.md support are built with mods.

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Claude Code just got mods, a way to customize how it behaves and looks. Here's what you need to know. The ClaudeDevs account announced it on Oct 2, 2026, one day after the http://Claude.dev launch. The post says you can now mod Claude Code to change how it behaves, customize the UI, and swap in your own features. It had 685.1K views within hours. A mod is a few lines of TypeScript, or you can have Claude build it for you by prompting it. Mods ship inside plugins, so you install them with /plugin in the CLI or desktop app. Under the hood, mods are hooks. Each one is a small JavaScript or TypeScript module that runs inside Claude Code. It can intercept internal events like tool calls, prompts, model requests and renders, and change what actually happens. It can also add its own UI and commands. Mods can even fork agents to do extra work, such as a custom classifier that writes memories every turn. Anthropic says it used mods to build features like /diff and AGENTS.md support. Claude Code 2.1.287 carries the release, with 106 CLI changes. Pre-built sample mods are being added to the Claude Code Playground repo. A getting started guide is on the http://claude.dev blog, written by Addy Osmani. One user says mods have been in early preview for a couple of weeks. One example is the next-steps mod, which suggests what to do next, including picking skills and other commands. Install it with: claude plugin marketplace add anthropics/claude-plugins-community claude plugin install next-steps@claude-community Mods run with the same access to your machine as Claude Code itself. Anthropic says to only install mods from sources you trust. You can keep a mod to yourself, or submit it to the Claude directory at http://claude.ai/directory. Builders are reacting fast. Boris Cherny calls it customizing Claude by just prompting it. Lydia Hallie describes mods as middleware for Claude Code. Thariq says all software is becoming malleable. Users are asking for the same in Codex, and one got Doom running in the Claude Code spinner. Key numbers: - 685.1K views on the announcement post - Claude Code 2.1.287 - 106 CLI changes in that release - Announced Oct 2, 2026 Mods are a plugin-based way to rewrite Claude Code's behavior and UI in TypeScript.

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About this mod

On October 2, 2026, ClaudeDevs announced that Claude Code supports mods: use a few lines of TypeScript (or let Claude write them) to change its behavior, customize the UI, or replace functionality. Mods are packaged in plugins and installed via /plugin in the CLI or desktop app; underneath, they are hooks—small JS/TS modules running inside Claude Code that can intercept tool calls, prompts, model requests, and rendering, and change the results. They can also add their own UI and commands, or even fork the agent for extra work (such as a classifier that writes memory each turn). Anthropic says /diff and AGENTS.md support were implemented with mods. Released with Claude Code 2.1.287, including 106 CLI changes; example mods are being added to the Claude Code Playground repository, and the claude.dev blog has a beginner's guide by Addy Osmani. An example next-steps mod can suggest next actions. Note: mods have the same machine access as Claude Code, and the official recommendation is to install only mods from trusted sources; you can keep them private or submit them to claude.ai/directory. Community reaction has been enthusiastic, with some users even running Doom in the Claude Code spinner.

Installation

Check the author's README for the marketplace and plugin name first. Commands may change as the repository evolves.

claude plugin marketplace add anthropics/claude-plugins-community
claude plugin install next-steps@claude-community
Original text / README

Claude Code just got mods, a way to customize how it behaves and looks. Here's what you need to know.

The ClaudeDevs account announced it on Oct 2, 2026, one day after the http://Claude.dev launch. The post says you can now mod Claude Code to change how it behaves, customize the UI, and swap in your own features. It had 685.1K views within hours.

A mod is a few lines of TypeScript, or you can have Claude build it for you by prompting it. Mods ship inside plugins, so you install them with /plugin in the CLI or desktop app. Under the hood, mods are hooks. Each one is a small JavaScript or TypeScript module that runs inside Claude Code. It can intercept internal events like tool calls, prompts, model requests and renders, and change what actually happens. It can also add its own UI and commands. Mods can even fork agents to do extra work, such as a custom classifier that writes memories every turn.

Anthropic says it used mods to build features like /diff and AGENTS.md support. Claude Code 2.1.287 carries the release, with 106 CLI changes. Pre-built sample mods are being added to the Claude Code Playground repo. A getting started guide is on the http://claude.dev blog, written by Addy Osmani. One user says mods have been in early preview for a couple of weeks.

One example is the next-steps mod, which suggests what to do next, including picking skills and other commands. Install it with: claude plugin marketplace add anthropics/claude-plugins-community claude plugin install next-steps@claude-community

Mods run with the same access to your machine as Claude Code itself. Anthropic says to only install mods from sources you trust. You can keep a mod to yourself, or submit it to the Claude directory at http://claude.ai/directory.

Builders are reacting fast. Boris Cherny calls it customizing Claude by just prompting it. Lydia Hallie describes mods as middleware for Claude Code. Thariq says all software is becoming malleable. Users are asking for the same in Codex, and one got Doom running in the Claude Code spinner.

Key numbers:

  • 685.1K views on the announcement post
  • Claude Code 2.1.287
  • 106 CLI changes in that release
  • Announced Oct 2, 2026

Mods are a plugin-based way to rewrite Claude Code's behavior and UI in TypeScript.

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