v0.6.1 · Node 18+ · MIT

Install

Three ways in. The first is one command; the others exist for when you cannot or would rather not run it.

01 · One command
```
npx sumitsubo
```
Run it inside the project. It installs the core, the design layer, the companions and the stack pack it detects, then checks the files really landed on disk.
02 · Inside Claude Code
```
/plugin marketplace add kurodaSensei/sumitsubo
/plugin install sumi-design@sumitsubo
/plugin install sumi-nuxt@sumitsubo
```
No Node. The third line is the stack pack — swap it for sumi-react, sumi-shopify or sumi-wordpress.

03 · From a clone

git clone https://github.com/kurodaSensei/sumitsubo.git
claude plugin marketplace add ./sumitsubo
claude plugin install sumi-design@sumitsubo

The plugins load in place from the checkout, so your edits are live and `git pull` is the update.

Restart Claude Code afterwards. Plugins apply on the next session, not this one.

What you need

Claude Code and git. Node 18 or newer only for the first way — the other two do not use it.

A throwaway profile through CLAUDE_CONFIG_DIR. Your real configuration is never read or written, and deleting the folder undoes everything.

Install into a disposable profile

npx sumitsubo --sandbox

Same, simulating a machine with no GitHub SSH keys

npx sumitsubo --sandbox --no-ssh

The same command maintains the install. `update` also repairs a broken one.

Read-only check of what is installed

npx sumitsubo doctor

Pull the latest version of every plugin

npx sumitsubo update

Remove every plugin from the marketplace

npx sumitsubo uninstall

`Permission denied (publickey)` means an old copy of the marketplace or of Claude Code, not a missing key. Re-run the first way, or `claude update`.