Ground-Side Mission Plan Compilation with Policy-as-Code Guardrails for Cloud-Native Satellite Platforms

The problem is that cloud-native satellite runtimes lack an open-source ground-side toolchain to compile mission plans into executable artifacts. The method introduces Satellite Mission Compiler, a four-stage pipeline that parses plans against a Pydantic schema, evaluates them with OPA/Rego policy-as-code guardrails, compiles into a WorkflowIntent IR, and renders Argo Workflow DAGs and Kueue Job manifests with DRA support. Experimental evidence includes golden translation evaluations, argo lint, in-process OPA decision reproduction, and live single-node cluster submission with DRA-backed GPU admission on Kueue v0.17.3 and v0.18.3, plus a unified GPU+CPU quota with scheduler-level accelerator fallback. This matters because it provides the first open-source, defense-in-depth validated pipeline for pre-uplink mission plan compilation, bridging the gap between human-authored plans and cloud-native satellite runtimes.