Add single-source loading and version checks

docs/development.md

@@ -1,10 +1,10 @@
 # Development
 
 This is the contributor entry point for ConfigKit. Read the task-specific owners
-below before making changes. The repository is in early implementation: it has a
-Go module and documented root package, but no loading behavior or executable
-examples yet. The [component overview](internal/overview.md) owns the implementation
-inventory.
+below before making changes. The repository is in early implementation: its public
+loader currently covers one strict source, typed defaults, schema-version checks,
+and base/default metadata. The [component overview](internal/overview.md) owns the
+implementation inventory.
 
 ## Initial orientation