Rebuilding Four Small Projects

The author redesigned four open-source projects—DonumAI, MittentisAi, Learn with DonumAI, and EZTime—to simplify their architectures and make them easy to document with single diagrams. Common improvements across these projects include implementing background job processing, using atomic JSON writes for state management, and adopting stricter security protocols such as output sanitization and enhanced privacy via Google's Interactions API.