Mod Maker — Development skill for Claude Code

Mod Maker (free)

Mod Maker finds what you ask Claude Code again and again, then builds a mod so you never ask again.

The pack holds Mod Maker, 11 example mods and a virtual office. All 120 automatic tests pass (120/120).

A mod changes Claude Code itself: a pane, a status line, a guard before a command. It runs on its own. You don't have to remember it.

Install (3 commands)

You need Claude Code 2.1.287 or newer. Run these in your terminal:

claude plugin marketplace add charlie947/mod-maker
claude plugin install mod-maker@charlie-free-mods
claude plugin install safe-delete@charlie-free-mods

Then restart Claude Code. Add any other mod below the same way: `claude plugin install @charlie-free-mods`.

Downloaded the folder instead? Point the marketplace at it. I tested this on a blank copy of Claude Code first (folder path shortened):

$ claude plugin marketplace add /path/to/mod-maker-pack
✔ Successfully added marketplace: charlie-free-mods
$ claude plugin install mod-maker@charlie-free-mods
✔ Successfully installed plugin: mod-maker@charlie-free-mods (scope: user)

**Trust first.** A mod runs code on your computer. Every mod here is a few short files you can read. Before you install anyone's mod (mine included), run `/mod-check ` and read what it can do.

Mod Maker: 4 parts

1. /mod-audit reads the prompts you typed in your last 30 sessions and ranks what you ask again and again, with real counts. Your prompts never leave your computer.
2. /mod-build 2 builds a mod for item 2 on that list. It asks Claude to use Claude Code's own mod-writing skill, write a test and check the mod passes.
3. /mod-check says in plain English what a mod can read, run and send, before you trust it.
4. The habit spotter is always on. The third time you ask the same thing in one session, a bar above your prompt asks: "Make it a mod?"

11 example mods

Mod	What it does	Status
mission-control	A live