Accept span deletions in structured responses

docs/internal/modules.md

@@ -43,6 +43,10 @@ renders their embedded definitions from those variables and validates the
 correction-set schema before Audita maps proposals. Domain validators still
 check confidence, applicability, protected glossary terms, and replacement
 policy. Shared context encoding lives in `internal/framework/promptcontext`.
+An empty `corrected_text` deletes the identified span when the resulting segment
+remains nonblank. Whitespace-only original spans can express spacing corrections;
+matching stays literal under each module's replacement policy. No automatic
+whitespace cleanup follows application.
 
 ## Validator Chain Ownership