Clean release snapshot

tests/fixtures/plugin_capabilities/valid_owner_provider.json

@@ -0,0 +1,18 @@
+{
+  "id": "stems",
+  "name": "Stems",
+  "standards": ["capability-pipelines.v1", "plugin-runtime-idempotent.v1"],
+  "capabilities": {
+    "stems": {
+      "roles": ["owner", "provider"],
+      "commands": ["mute", "restore", "inspect"],
+      "events": ["claim:created", "claim:released", "stems.ready"],
+      "description": "Owns stem mute and restore coordination for integrated audio plugins.",
+      "mode": "active",
+      "compatibility": "none",
+      "ownership": "exclusive-owner",
+      "safety": "safe",
+      "version": 1
+    }
+  }
+}