This article explains the State Pattern, a design approach that helps applications manage behavior changes based on their current state. It highlights how using this pattern can prevent common user experience issues, making interactions more predictable and responsive. Examples like media players and vending machines illustrate its practical applications.

Implementing an intuitive and context-aware undo/redo system in Alkemion Studio, a visual brainstorming tool for TTRPGs, presents unique challenges due to its multi-context user interactions. The system emphasizes that users should only be able to undo actions they can see, which prevents confusion and potential data loss. The article details the architecture of the system, including action classes, context management, and the importance of structured autosave events.

The rise of agentic AI is fundamentally altering software design, moving from traditional products to systems that allow for autonomous decision-making. This shift presents challenges in governance, user trust, and the integration of AI into existing workflows, necessitating new approaches to application development and user experience. As AI agents become collaborative partners, the focus must shift to designing systems that facilitate effective human-agent interaction.