As a Principal Architect, you will be expected to identify systemic architectural challenges, establish long-term technical direction, drive architectural convergence across teams and services, define durable architectural principles and reference patterns, and create technical leverage that extends beyond any individual product, component, or organization. Define reference architecture and architectural principles for agentic and multi-agent AI systems, including planning, reasoning, tool use, task decomposition, delegation, collaboration, state and memory management, human-in-the-loop patterns, failure recovery, bounded autonomous execution, and communication between agents and services.