Ext Scaffold

A working Manifest V3 extension in one command — no npm, no bundler, no "why doesn't my service worker register".

Commands

python3 scripts/ext_scaffold.py my-extension
python3 scripts/ext_scaffold.py my-extension --dir ~/projects --permissions storage,tabs

Generated

my-extension/
├── manifest.json    # MV3, kebab-case name validated, permissions you asked for
├── background.js    # service worker: install hook + message ping/pong
├── content.js       # content script: runs on all pages, pings background
├── popup.html       # action popup with a working button
└── popup.js         # popup logic: queries the active tab

Load it: chrome://extensions -> Developer mode -> Load unpacked. It works before you touch a line — message passing, content injection, and popup all wired.

Pairs with

webapp-testing (drive the browser with your extension loaded), code-review (review what you build on the scaffold).