MyAuberge K.K. This document specifies the Data Artifact Management (DAM) protocol for agentic AI systems governed by the Sovereign Object OS (SOOS) framework. DAM defines a typed taxonomy of data artifacts produced and consumed by AI agents, a governance envelope for each artifact type specifying provenance, access policy, temporal validity, and retention requirements, and the normative interface between agent- generated artifacts and the Governance Audit Record (GAR). DAM addresses three classes of data in agentic systems: kernel- generated artifacts (IDP event logs, GAR records, AEP session state), agent-generated artifacts (outputs of agent actions), and externally ingested artifacts (data made available by resources). DAM specifies the Data Artifact type (DA-Type) taxonomy referenced in the Resource Governance Protocol (RGP) and the Agent Execution Protocol (AEP). This document is a placeholder submission establishing the draft identifier and abstract. Full specification text will be submitted post-IETF 126 Vienna. Further information: https://soosproject.ai/drafts/dam