Enable correction-aware semantic reconciliation

docs/internal/pipeline.md

@@ -35,6 +35,9 @@ module capabilities and typed artifact compatibility, validates options, and
 assigns a deterministic resolved-composition digest. A correction protocol is
 selected from each eligible LLM-backed producer specification and becomes part
 of that resolved identity; only `single_response_v1` is currently supported.
+Preparation rejects an LLM-backed producer that combines a non-empty validator
+chain with positive producer retries unless it declares that protocol. Producers
+without validators or without retries remain valid without correction support.
 The resolved pipeline contains bindings and declared reference targets, not
 external reference bytes.
 After selection, the resolver applies command, binding, and pipeline profile