Claude Code Mod Stack

Mods are small JavaScript or TypeScript functions that change how Claude Code looks and behaves, launched on October 1, 2026. A mod stack is the set of mods you run together, chosen so each one has a clear job and they do not get in each other’s way.

A good stack feels invisible until it saves you.

• Some Claude Code features already run as built-in mods, such as the diff pane and AGENTS.md loading
• You Should Know is off by default; a side agent posts notes on things you might miss in longer tasks
• Find them in /plugin, under Installed, then Built-in

Review these before adding anything else, so you do not duplicate them.

• Hold risky commands, such as force pushes or recursive deletes, behind a confirm button
• Hide secrets in tool output before Claude reads them
• Block edits to protected files and folders

Anthropic’s sample Blast Radius mod shows how to guard risky commands.

• Show how full the context window is, like the sample Token Weather mod
• Count tool calls or time spent per turn
• Show the current branch and test status above the prompt

• Instant slash commands that run your code with no Claude turn
• Replay the last turn’s edits, like the sample Replay Theater mod
• Rewrite prompts to add your team’s standard context

• Quiet modes that hide noise during long tasks
• Reminders to take a break or commit your work
• A pane with your current task checklist

CLAUDE.md

Standing project instructions

Skills

Repeated directions and know-how

Hooks

Scripts you already own that run on events

MCP

New tools and outside systems

Mods

Interface changes, commands, and event rewrites

Use the simplest layer that solves the problem. Not everything needs a mod.

Solo developer

Safety guard, context meter, replay command

Team

Safety guard, secret masking, team prompt context, shared commands

Learner

Context meter, You Should Know, a task checklist pane

• Mods ship inside plugins: /plugin install name@marketplace
• Run /reload-plugins after changes
• Check what is active in /plugin
• Pin versions you trust and update on purpose
• Mods need Claude Code v2.1.287 or later in the terminal

• Add one mod at a time and use it for a day
• Watch for two mods rewriting the same event
• Remove mods that slow down every turn
• Load a mod for one session with claude --plugin-dir to try it safely

• Mods are not sandboxed, so read the code before installing
• Prefer Anthropic samples and marketplaces you trust
• On managed machines, follow your organisation’s mod policy

Bundle your favourite mods, skills, and commands into one plugin so teammates can install the same stack in one step.