Explore the journey of integrating external code into Emacs in this 27-minute conference talk from Emacs Conference 2013. Delve into the motivations behind incorporating code into Emacs, learn essential bookkeeping practices, and understand the process of making code Emacs-ready. Discover the pros and cons of maintaining a fork, gain insights on compatibility functions, and participate in a Q&A session. Whether you're an Emacs enthusiast or a developer interested in contributing to open-source projects, gain valuable knowledge on the intricacies of code integration and maintenance within the Emacs ecosystem.