Plan the Go example testing migration

docs/roadmap/configkit.md

@@ -4,8 +4,8 @@ Status: complete. The implemented result includes the agreed execution-owned
 normalization adjustment for ConfigKit v1.0.0. Current consumer documentation
 remains authoritative for supported behavior.
 
-The companion [implementation plan](implementation.md) owns the ordered sprint
-steps and validation assignments.
+The completed implementation plan is preserved in Git history at `79dfd97`:
+`git show 79dfd97:docs/roadmap/implementation.md`.
 
 ## Purpose
 

docs/roadmap/example-testing.md

@@ -12,6 +12,9 @@ is simpler ownership and execution of tests, not a language-only translation or
 a particular reduction in line count. This is a tooling change, not a new public
 library API or a new release gate.
 
+The companion [implementation plan](implementation.md) defines the staged work
+for reaching this target.
+
 ## Current Baseline
 
 The [preparation](../../examples/go-library/prepare/main.go),