Jake Wharton recounts the origin story of ActionBarSherlock, an Android library that grew out of a personal need to build a vSphere client app. He traces the library's evolution from a single-class file (v1.0) through a series of rewrites, including a 'lost' v3.0 that was scrapped hours before release, culminating in the v3.x branch. The post highlights key design decisions, collaborations with GreenDroid and Android-ActionBar authors, and the community adoption that shaped the library.