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A fast and lightweight Trello plugin for working with Scrum
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This is my fork of rickpastoor's Scrummer. Below is the original readme for Scrummer.

Scrummer Build Status

Download Scrummer for Google Chrome

Download Scrummer for Firefox

Download Scrummer for Safari

I'm working with Trello. A lot. I've used the Scrum for Trello plugin, but I found it slowing down Trello when working with a lot of cards. So I wrote a new plugin from scratch, without dependencies on external libraries to keep the footprint as small as possible. Using native browser API's instead of jQuery makes it lightning-fast!

Big kudo's to the guys at Q42 for building Scrum for Trello. If you want more features, use theirs. Use this plugin if you just want to keep track of storypoints and totals for each column in your board, nothing else.


  • Displays the number of points for each card in a badge
  • Total points for each column
  • Clickable buttons next to the title-field to quickly enter your estimate

Developing and testing Chrome

To get started with developing your own additions to this plugin, run this command:


After this, add a new unpacked extension to your local Google Chrome and point this to the dist/build/scrummer.chromium folder. Now make your changes, run make-chromium and refresh your plugin in Chrome to see if everything is working as it should. There are no tests yet, because YOLO.

Developing and testing Firefox

To get started with developing your own additions to this plugin, run this command:


After this, install JPM:

npm install jpm --global

With JPM, you can run the plugin in a debug environment. Change your directory to dist/build/scrummer.firefox and run jpm run. Now open your Trello board to see if your changes are working as expected. Happy coding!

Developing and testing Safari

To build your own version of the Scrummer for Safari plugin, follow these steps:

Install xar-js:

npm install xar-js --global

You need to follow the xar-js README on how to export the required certificate files in order to build a valid version of the extension.

After following this guide, you should have these files inside your platform/safari folder:


Almost ready. Now run this command:

tools/ all

The script will build a scrummer.safariextz. Doubleclick it and Safari will ask you if you want to install the extension.

You can’t perform that action at this time.