I want a custom framework that drives emotions and resulting behaviors for a small interactive 3D character. The system should: • Maintain discrete mood states using a clean, extensible state-machine or behavior-tree architecture. • Support clear transitions between states (smooth, instant, or context-based—whichever is most maintainable and scalable). • Be delivered as modular, well-structured code with thorough inline comments and concise API documentation. A minimal demo scene should be included, featuring a placeholder 3D model reacting to at least two different stimuli and changing moods accordingly. Acceptance is complete once I can integrate the module into my project, add a new mood without editing core files, and see the expected behavior in the demo. Required Skills: • Strong Python or game-engine scripting (Unity C# or Unreal Blueprints/C++) • Experience with state machines or behavior-tree systems • Ability to write clean, modular, well-documented code Preferred Skills: • Animation or character-behavior experience • AI/ML fundamentals. Please include brief examples of relevant AI, behavior-tree, or emotion-system work. Full project details will be provided after signing an NDA.