Add redacted effective rendering

docs/development.md

@@ -4,8 +4,8 @@ This is the contributor entry point for ConfigKit. Read the task-specific owners
 below before making changes. The repository is in early implementation: its public
 loader currently covers strict selected sources, explicit path/glob import graphs,
 composition, selected profile overlays, typed defaults, schema-version checks,
-recorded application resolution,
-semantic validation, and metadata. The
+recorded application resolution, semantic validation, layered metadata, secret
+classification, and redacted effective rendering. The
 [component overview](internal/overview.md) owns the implementation inventory.
 
 ## Initial orientation