Relax private D&D response schemas

docs/internal/llm.md

@@ -157,11 +157,11 @@ schemas remain package-owned.
 The spell, NPC, and combat extractors' package-owned prompts declare their
 structured JSON inputs and private response schemas. Each private response
 schema remains separate from its durable artifact codec schema; this work does
-not use shared schema fragments or schema generation. The combat private schema
-owns the transport envelope—required fields, JSON types, nullability, and
-unknown-field rejection—while its deterministic validators own semantic
-constraints such as enum membership, non-empty values and collections, and
-positive numbers. The spell extractor's prompt declares a required
+not use shared schema fragments or schema generation. Those private schemas own
+the transport envelope—required fields, JSON types, nullability, and
+unknown-field rejection—while deterministic validators own semantic constraints
+such as enum membership, non-empty values and collections, and positive
+numbers. The spell extractor's prompt declares a required
 `application/json` `spell_catalog` input and an optional `application/json`
 `npcs` input. The extractor generates
 the catalog input from its prepared