Make combat scene validation more reliable

assets/dnd/scene-descriptions/validate/combat-semantics/prompts/instructions.md

@@ -1,11 +1,8 @@
-Review only whether the proposed scene kind correctly represents substantive
-active combat in the supplied transcript chunk under the shared combat policy.
-Do not judge the scene title, summary, non-combat subtype, scene boundary, or
-any other aspect of a scene description.
+Classify only whether substantive active combat occurs in the supplied
+transcript chunk under the shared combat policy. Do not judge the scene title,
+summary, non-combat subtype, scene boundary, or any other aspect of a scene
+description.
 
-Return `approved` only when the proposed kind's combat status is supported;
-approval does not endorse any other part of the scene description. Return
-`combat_should_be_added` when a proposed non-combat kind omits substantive
-active combat. Return `combat_should_be_removed` when a proposed `combat` kind
-is unsupported. Give a concise, transcript-grounded explanation for every
-verdict.
+Return `combat` when the chunk contains substantive active combat and
+`non_combat` otherwise. Give a concise, transcript-grounded explanation for
+the classification.