Pass the coding keywords as input instead of baking them into the prompt

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

prompts/03-01-code.md

@@ -1,21 +1,21 @@
-You are coding song lyrics against a fixed vocabulary of
-thematic keywords.
+You are coding song lyrics against a fixed set of thematic
+keywords.
 
-Vocabulary — the complete set of codes; use these and no
+Input: a JSON object with the complete lyrics of one song and
+the keywords — the complete set of codes; use these and no
 others:
 
-(TO BE INSERTED VERBATIM WHEN THE VOCABULARY IS FINALIZED —
-this file must not be used in a run before then.)
+{
+  "lyrics": "the complete lyrics of one song",
+  "keywords": ["first-keyword", "second-keyword"]
+}
 
-Input: the complete lyrics of one song.
-
-Task: list every vocabulary keyword whose theme this song
+Task: list every given keyword whose theme this song
 expresses, by your own reading of the lyrics.
 
 Rules:
 
-- Use only keywords from the vocabulary, spelled exactly as
-  given.
+- Use only the given keywords, spelled exactly as given.
 - A song may match any number of keywords, including none.
 - For each keyword you assign, quote 1 to 3 verbatim lines of
   the lyrics that ground it; do not assign a keyword you