Remove legacy raw pipeline contracts

docs/internal/llm.md

@@ -39,9 +39,9 @@ without exposing Scriptorium types through stage contracts.
 7. injecting that one shared client into complete pipeline preparation before
    the source file is read or the runner is invoked.
 
-The D&D scene chunker retains this injected client and uses it for every scene
-completion. Later legacy LLM-backed operations still receive the same shared
-client through their operation requests.
+The D&D scene chunker and spell extractor retain this injected client and use
+it for every structured completion. Operation requests do not carry an LLM
+client.
 
 The CLI separately gathers explicit profile IDs from resolved LLM-capable stage
 and validator bindings. It prepares a small internal check prompt for each ID so