If Agile is a mindset, then what does that say about the idea of Agile methodologies? To answer this question, you may find it helpful to have a clear definition of methodology.
Alistair Cockburn suggested that a methodology is the set of conventions that a team agrees to follow. That means that each team will have its own methodology, which will be different in either small or large ways from every other team’s methodology.
So Agile methodologies are the conventions that a team chooses to follow in a way that follows Agile values and principles.
“Wait,” you’re probably saying, “I thought Scrum and XP were Agile methodologies.” Alistair applied the term framework to those concepts. They certainly were born from a single team’s methodology, but they became frameworks when they were generalized to be used by other teams. Those frameworks help inform where a team starts with their methodology, but they shouldn’t be the team’s methodology. The team will always need to adapt its use of a framework to fit properly in its context