Extending the Sovereign AI OS: Symphony as Compute Ontology for Palantir Foundry and NVIDIA

The Sovereign AI Operating System Reference Architecture, announced by Palantir and NVIDIA in March 2026, combines Foundry's data ontology with NVIDIA's GPU stack in a turnkey AI datacenter blueprint. The present paper extends the architecture with IBM Spectrum Symphony as a heterogeneous compute orchestrator, enabling neuromorphic processors, quantum resources, edge sensors, and mainframe systems to participate as peer compute tiers alongside GPUs within Foundry's governed ontology framework. Four working demonstrations validate the extension: autonomous ontology construction through multi-domain neuromorphic perception spanning seven sensor modalities, 155:1 data distillation from edge events to Foundry records through cross-modal neuromorphic fusion, computational diversity as a security property through multi-paradigm trust verification, and AI-enabled financial ontology discovery. Symphony's compute ontology, comprising typed ELIM resource metrics, consumer hierarchy governance, and SOAM service lifecycle management, provides workload management intelligence the existing compute substrate cannot express. The architecture is complementary to the existing reference architecture rather than competitive, adding a heterogeneous orchestration layer while maintaining all existing Palantir and NVIDIA components.