feat(ITC-WP-0017): establish AgenticDrivesFunctional pattern

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a025c2-407a-7a32-b40a-f37a52f03f62

infospace/agent/retrieval-index.json

@@ -1,5 +1,13 @@
 {
   "common_distinctions": [
+    {
+      "id": "agentic-fallback-direct-interface",
+      "source_artifacts": [
+        "practice-pattern/agentic-drives-functional"
+      ],
+      "summary": "Use cross-repository agentic work to interpret novel demand; use an owned API, CLI, or MCP surface when the outcome is stable and recurring.",
+      "title": "Agentic fallback vs direct functional interface"
+    },
     {
       "id": "interface-deprecation-retirement-removal",
       "source_artifacts": [
@@ -51,7 +59,7 @@
     }
   ],
   "infospace": "canon",
-  "item_count": 70,
+  "item_count": 71,
   "items": [
     {
       "canonical_path": "assimilation/it-capability-canon/ASSIMILATION.md",
@@ -1531,6 +1539,54 @@
       "title": "Intent Scope Purposes Pattern",
       "warnings": []
     },
+    {
+      "canonical_path": "patterns/AgenticDrivesFunctional.md",
+      "id": "practice-pattern/agentic-drives-functional",
+      "imports": [
+        "model/capability",
+        "model/governance",
+        "model/observability",
+        "model/task",
+        "scheme/practice-pattern"
+      ],
+      "kind": "practice-pattern",
+      "owned_concepts": [
+        "AgenticDrivesFunctional",
+        "AgenticFallback",
+        "DemandSignature",
+        "FunctionalInterfaceCandidate"
+      ],
+      "relationships": [
+        {
+          "target": "scheme/practice-pattern",
+          "type": "conforms_to"
+        },
+        {
+          "target": "model/capability",
+          "type": "uses"
+        },
+        {
+          "target": "model/governance",
+          "type": "uses"
+        },
+        {
+          "target": "model/observability",
+          "type": "uses"
+        },
+        {
+          "target": "model/task",
+          "type": "uses"
+        },
+        {
+          "target": "practice-pattern/interface-deprecation-strangler",
+          "type": "related_to"
+        }
+      ],
+      "source_path": "patterns/AgenticDrivesFunctional.md",
+      "summary": "Reusable canon PracticePattern: AgenticDrivesFunctional.",
+      "title": "AgenticDrivesFunctional",
+      "warnings": []
+    },
     {
       "canonical_path": "patterns/InterfaceDeprecationStrangler.md",
       "id": "practice-pattern/interface-deprecation-strangler",