This is just some scaffolding code for creating a simple filter then open url alfred workflow.

Install

npm install alfred-scaffold -g

Use

new-alfred-workflow --name <name>

This creates a new directory with all the files needed to build your extension.

To create a simple filter -> openurl workflow:

edit src/workflow.js; use the alfredo module to generate candidate items for feedback.
put your filter and workflow icons into the images folder
Update package.json with name, author, description and relative icon paths.
make -f makefile.mk pack to create the alfred workflow in the same directory. It will use package.json information