Backend fabric extension

examples/backends/context-package-backend.yaml

@@ -0,0 +1,15 @@
+id: local-context-packages
+kind: context-backend
+name: Local Context Package Registry
+version: "1"
+capabilities:
+  - context_packages
+  - policy
+  - provenance
+  - source_maps
+storage:
+  engine: filesystem
+  path: .markitect/context
+policy:
+  mode: labels
+description: Local manifest for agent-ready context packages.