Publish reciprocal canon federation interface

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a070b5-4994-7271-bd8b-7c3dbcedec4b

infospace/agent/retrieval-index.json

@@ -60,7 +60,7 @@
     }
   ],
   "infospace": "canon",
-  "item_count": 80,
+  "item_count": 81,
   "items": [
     {
       "canonical_path": "assimilation/canon-federation/ASSIMILATION.md",
@@ -1094,6 +1094,27 @@
       "title": "Qonto Assistant Emission Cadence Worked Example",
       "warnings": []
     },
+    {
+      "canonical_path": "interfaces/federation.yaml",
+      "id": "interface-card/canon-federation",
+      "imports": [
+        "kernel/itc-core"
+      ],
+      "kind": "interface-card",
+      "owned_concepts": [
+        "InfoTechCanon federation interface"
+      ],
+      "relationships": [
+        {
+          "target": "kernel/itc-core",
+          "type": "conforms_to"
+        }
+      ],
+      "source_path": "../the-custodian/canon/architecture/adr-006-canon-federation-concept-ownership.md",
+      "summary": "Canon artifact: InfoTechCanon federation interface.",
+      "title": "InfoTechCanon federation interface",
+      "warnings": []
+    },
     {
       "canonical_path": "kernel/InfoTechCanonCore.md",
       "id": "kernel/itc-core",