feat(ITC-WP-0016): establish PracticePattern language

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

infospace/artifacts/index.yaml

@@ -609,6 +609,33 @@ artifacts:
         target: model/governance
       - type: uses
         target: model/task
+  - id: scheme/practice-pattern
+    path: patterns/PracticePatternScheme.md
+    kind: practice-pattern-scheme
+    title: PracticePattern Scheme
+    provenance:
+      placement: authored
+      placement_workplan: ITC-WP-0016
+    relationships:
+      - type: conforms_to
+        target: kernel/itc-core
+  - id: practice-pattern/interface-deprecation-strangler
+    path: patterns/InterfaceDeprecationStrangler.md
+    kind: practice-pattern
+    title: InterfaceDeprecationStrangler
+    provenance:
+      placement: generalized
+      placement_workplan: ITC-WP-0016
+      known_use: state-hub/docs/workplan-terminology-transition.md
+    relationships:
+      - type: conforms_to
+        target: scheme/practice-pattern
+      - type: uses
+        target: model/governance
+      - type: uses
+        target: model/observability
+      - type: uses
+        target: model/devsecops
   - id: mapping/purpose-demand-governance-candidates
     path: mappings/purpose-demand-governance-candidates.yaml
     kind: mapping