Developing for Developers
Usability Applied to Programming
I’ll talk about development for an open-source project / library / plugin - meaning, for other developers.
That usually means you’re not paid, you have no commitment on milestones and you are look for fame/love/hate from your
peers. In this case, don’t do the exact opposite as when you are paid...
Keep usability in mind and mind the developers who will use your work.
I’ll focus on applying usability principles to API design, and illustrate by the work I recently done on a symfony plugin

Developing for End-Users
Prototype
User testing
Requirements
Scheduling
Code
API Documentation
Unit testing
User manual
Performance tweaking
Packaging
Communication
Support