The Foundation

At the heart of each citizen lies what we might call their "cognitive architecture" - a set of interconnected systems that work together much like the different regions of the human brain. These systems include:

The Needs Framework

Consider this system like the basic survival instincts in humans. Just as we feel hungry or tired, citizens experience various needs that drive their behavior. These needs aren't simply binary states but exist on a continuous spectrum, creating nuanced motivations for action.

These needs include:

• Physical needs (energy, comfort)

• Social needs (interaction, belonging)

• Higher-level needs (achievement, growth)

What makes this system particularly interesting is how these needs interact with each other. A citizen might be physically tired but socially energized, creating complex decision-making scenarios that mirror real human experiences.

The Memory Tapestry

Unlike simple game characters that reset each day, SIMULACRA citizens build a rich tapestry of memories that influence their future behavior. Think of this system as similar to human autobiographical memory, with several key components:

Short-term Memory

• Recent interactions and events

• Current environmental conditions

• Ongoing activities and goals

Long-term Memory

• Significant life events

• Relationship histories

• Learned preferences

• Successful strategies

Our memory system creates rich historical context for each agent:

class MemoryManager:
    """
    Creates a sophisticated memory system that influences future behavior
    and creates a sense of personal history for each agent.
    """
    async def evaluate_past_experiences(
        self,
        activity: ActivityType,
        memories: List[Dict[str, Any]]
    ) -> float:
        # Consider factors like:
        # - Emotional impact of memories
        # - Recency of experiences
        # - Context similarity
        # - Success/failure patterns

What makes this memory system sophisticated is how it doesn't just store information - it actively influences future decisions and emotional responses, creating a sense of personal history and growth.