Only prepend referenced character descriptions

ltx_director.py

@@ -375,12 +375,20 @@ def _character_prompt_replacements(characters: list[dict]) -> dict[str, str]:
     return replacements
 
 
-def _prepend_character_descriptions(global_prompt: str, characters: list[dict] | None = None) -> str:
-    descriptions = [
-        (character.get("description", "") or "").strip()
-        for character in (characters or [])
-        if (character.get("description", "") or "").strip()
-    ]
+def _prepend_referenced_character_descriptions(
+    global_prompt: str,
+    local_prompts: str,
+    characters: list[dict] | None = None,
+) -> str:
+    prompt_text = f"{global_prompt or ''} {local_prompts or ''}"
+    descriptions = []
+    for character, tags in zip(characters or [], _build_character_tag_groups(characters or [])):
+        description = (character.get("description", "") or "").strip()
+        if not description:
+            continue
+        if any(tag in prompt_text for tag in tags):
+            descriptions.append(description)
+
     if not descriptions:
         return global_prompt or ""
 
@@ -2099,7 +2107,7 @@ class LTXDirector(io.ComfyNode):
             image_cache=image_cache,
             input_dir=input_dir,
         )
-        global_prompt = _prepend_character_descriptions(global_prompt, characters)
+        global_prompt = _prepend_referenced_character_descriptions(global_prompt, local_prompts, characters)
         char_slot_images = [list(character.get("images") or []) for character in characters]
         char_images = [img for slot_images in char_slot_images for img in slot_images]