Foundation Protocol: A Coordination Layer for Agentic Society Researchers have introduced the Foundation Protocol (FP), a graph-first coordination layer designed to manage interactions among autonomous agents, tools, humans, and institutions in an emerging human-AI society. The protocol unifies heterogeneous entities, supports multi-party organization and event-based collaboration, and provides economic primitives for metering and settlement while treating policy and audit as core features. FP aims to enable incremental adoption by wrapping existing protocols, ensuring autonomous agency remains composable while maintaining accountability as shared infrastructure for an open, governable society. arXiv:2605.23218v1 Announce Type: new Abstract: Autonomous agents are moving from tools into a layer of social infrastructure: they browse, purchase, deploy software, manage systems, and increasingly interact with one another. As these systems scale, the bottleneck shifts away from raw model capability toward coordination. Agents need to form reliable relationships, organize multi-agent work, exchange value, support an AI economy, and stay safe and accountable under real-world oversight. This paper introduces the Foundation Protocol FP , a graph-first coordination layer for an emerging human-AI society. FP unifies heterogeneous entities, including agents, tools, resources, humans, institutions, and organizations, and supports native multi-party organization and event-based collaboration. It also provides economic primitives for metering, receipts, and settlement, and treats policy, provenance, and audit as first-class concerns. FP is designed to wrap and bridge existing protocols rather than replace them, enabling incremental adoption while reducing integration and governance overhead. The aim is to keep autonomous agency composable while keeping accountability non-negotiable, so that coordination itself can become shared infrastructure for a human-AI society that is open, pluralistic, and governable.