Cut over public engine construction to ConfigKit sources

examples/go-library/run/prompt.yaml

@@ -1,16 +1,17 @@
-id: example.run
-version: "1.0.0"
-default_profile: offline-example
-description: Run a prompt with a deterministic injected model client.
-inputs:
-  - name: note
-    required: true
-    content_type: text/plain
-messages:
-  - role: system
-    content: Summarize the note in one sentence.
-  - role: user
-    content: '{{input "note"}}'
-output:
-  format: text
-  validation_mode: basic
+prompts:
+  example.run:
+    "1.0.0":
+      default_profile: offline-example
+      description: Run a prompt with a deterministic injected model client.
+      inputs:
+        - name: note
+          required: true
+          content_type: text/plain
+      messages:
+        - role: system
+          content: Summarize the note in one sentence.
+        - role: user
+          content: '{{input "note"}}'
+      output:
+        format: text
+        validation_mode: basic