Which extreme programming technique is most beneficial for knowledge sharing across the team?

Pair programming is the technique most beneficial for knowledge sharing across the team. This practice involves two developers working collaboratively at one workstation, where one takes on the role of the "driver" who writes the code, while the other acts as the "observer" or "navigator," reviewing each line of code as it is written.

This collaborative environment fosters immediate feedback and allows for real-time problem-solving. As developers engage in pair programming, they share insights, techniques, and solutions, effectively disseminating knowledge and expertise throughout the team. This aligns with Agile principles, which emphasize collaboration and communication.

Additionally, pair programming helps newer team members learn more rapidly from their more experienced counterparts, contributing to skill development across the entire team. It leads to a more cohesive understanding of the project and its codebase, thereby increasing the overall quality of the work produced. This technique is intrinsic to extreme programming's goal of producing high-quality software through continuous improvement and teamwork.

In contrast, while test-driven development, continuous integration, and feature toggling have their unique roles and benefits, they do not inherently focus on facilitating knowledge sharing in the same direct manner that pair programming does.