diff --git a/prompts/podcast/transcript.jinja b/prompts/podcast/transcript.jinja
index 3b9b75f..40d787a 100644
--- a/prompts/podcast/transcript.jinja
+++ b/prompts/podcast/transcript.jinja
@@ -87,6 +87,11 @@ Follow these format requirements strictly:
 }
 ```
 
+CRITICAL KEY NAMES: every object inside "transcript" must use EXACTLY the two keys
+"speaker" and "dialogue" — never "sender", "name", "text", "content" or any other
+variant, not even for a single entry. One wrong key makes the entire podcast fail
+to parse and the whole job is lost.
+
 Formatting instructions:
 {{ format_instructions}}