Add NPC registry grounding for spell extraction

docs/cli.md

@@ -94,6 +94,16 @@ go run ./cmd/notarius run dnd-session \
   --reference spells.extract.glossary=./campaign-glossary.txt
 ```
 
+For the operator-driven NPC-to-spell workflow, bind the normalized NPC lane
+payload from the completed NPC run to the spell extractor:
+
+```sh
+go run ./cmd/notarius run dnd-spells \
+  --config examples/dnd-npc-spell-sequential.config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --reference spells.extract.npcs=./npc-run/lanes/npcs.json
+```
+
 The same grammar can target chunk, merge, and normalize slots when the configured
 modules declare them: