Is the Sprint Backlog considered baselined at the end of Sprint Planning?

The Sprint Backlog is dynamic and can indeed change during the Sprint. This flexibility is a core principle of Scrum, allowing the team to adapt to changes and new information that emerges throughout the Sprint.

While the Sprint Backlog is created during Sprint Planning, it is not a fixed document; rather, it is an evolving artifact that reflects the team's understanding of the work needed to meet the Sprint Goal. As the team progresses through the Sprint, they may discover new tasks, re-evaluate the priority of certain backlog items, or modify their approaches based on what they learn. This adaptability is crucial to ensuring they can effectively address any challenges or opportunities that arise.

In this context, saying that it is static or fixed would contradict the agile philosophy that values responding to change over following a plan. Emphasizing the dynamic nature of the Sprint Backlog supports the Scrum team's ability to deliver valuable increments, as they can modify their focus based on ongoing insights and situations throughout the Sprint.