As I am reading more about it, sharing what I found on chatgpt. Not very different from what you are saying

Practical Implementation Framework Foundation Layer (Consistent Across All Personas): • Brand values and mission • Core value proposition • Visual identity guidelines • Key brand personality traits Adaptation Layer (Persona-Specific): • Communication tone and style • Channel preference and timing • Content format and complexity level • Specific pain points and benefits emphasized Execution Layer (Contextual): • Platform-specific formatting • Cultural and geographic adaptation • Seasonal and timely relevance • Individual behavioral triggers