chore: rename repository to NODEDC MISSION CORE

packages/plugin-sdk/README.md

@@ -0,0 +1,18 @@
+# Mission Core Plugin SDK
+
+This directory reserves the versioned host/plugin contract. It is not yet a
+published SDK and must not be treated as an implemented runtime.
+
+The first contract will define:
+
+- plugin manifest, version compatibility, firmware profiles, and permissions;
+- discovery candidates and opaque device references;
+- provisioning requests using secret references;
+- device-session lifecycle and health;
+- EvidenceStore handles and raw-artifact lineage;
+- canonical PointCloud, Pose, DeviceStatus, and metrics envelopes;
+- SceneSink and event interfaces;
+- capability-driven UI contribution data without plugin-owned layout.
+
+The XGRIDS K1 extraction is the first acceptance test. A synthetic reference
+plugin will verify that no K1 names or protocol assumptions remain in core.