Remove public prompt version metadata

docs/roadmap/implementation.md

@@ -438,6 +438,13 @@ Validation: compile the facade when remaining fixtures permit and run JSON
 contract tests. Search production code for stale prompt labels, separating
 unrelated version fields from the removed feature.
 
+Completion: public prompt identities and execution, inspection, requirement,
+observation, and diagnostic values no longer expose prompt-version metadata.
+Updated the conversions and GoDoc, and retained JSON round-trip checks while
+asserting the removed field is absent from representative values. The isolated
+JSON contract suite passed on Go 1.27.0, as did formatting and `git diff --check`.
+Remaining callers and the maintained example are assigned to later work.
+
 ## Stage 11: Verify Identified Composition And Inheritance
 
 Scope: `internal/configuration/load_test.go`, `targets_test.go`, and focused