Add redacted effective rendering

README.md

@@ -8,8 +8,10 @@ imports, strictly composes their disjoint definitions, applies typed defaults, a
 can overlay one selected fixed profile and check an application schema version. It
 returns detached metadata and safe diagnostics.
 Applications may perform audited defaulting and normalization through a resolver,
-then report domain errors and warnings through read-only semantic validation.
-Overrides, secrets, and rendering are still under development.
+then report domain errors and warnings through read-only semantic validation. Secret
+tags and a path predicate drive deterministic redacted effective YAML.
+Overrides, secret references/bootstrap, and value explanation are still under
+development.
 
 ```go
 type Config struct {