Community of Practice
ByAgile practices are built around cross function teams. The team members may become isolated especially if they are specialist such as user interface developers, testers, etc. Companies should encourage Community of Practice.
Community of Practice are groups of people who share a concern, a set of problems, or a passion about a topic and who deepen their knowledge and expertise in this area by interacting on a ongoing basis.
p. 263 – Scaling Lean and Agile Development: Thinking and Organizational Tools for Large-Scale Scrum
This allows a developer to interact with other developers so that they can keep their skill sets current.