AI coding tools have revolutionized personal productivity in software engineering but have also introduced challenges such as fragmented development and loss of shared knowledge, where developers work in isolation and solutions vanish after coding sessions. These issues result in inconsistent approaches and missed opportunities for learning from each other. Aviator Runbooks addresses these problems by transforming AI coding into a collaborative and systematic process through spec-driven development and multiplayer capabilities. Spec-driven development involves creating specifications before coding, ensuring consistency and capturing best practices as reusable templates, while the multiplayer feature allows developers to collaborate in real-time, share context, and maintain a persistent record of AI-guided decisions, thus enhancing both individual and team productivity. Runbooks not only enable developers to build on each other's work but also ensure aligned implementation by standardizing processes and preserving institutional knowledge, turning AI from an individual productivity tool into a platform for collective problem-solving.