Strengthen H3 reference prompt placement

dumas_h3_longvideos.py

@@ -4416,19 +4416,15 @@ def _inject_reference_context(block, context):
     text = str(block or "").strip()
     if not text:
         return context
-    match = re.match(r"^(\[Generation \d+\]\s*)(.*)$", text, re.S)
+    match = re.match(r"^(\[Generation \d+\]\s*)", text)
     if not match:
         return f"{context} {text}".strip()
-    prefix, body = match.groups()
-    body = body.strip()
-    split_at = body.find(". ")
-    if split_at == -1:
-        return f"{prefix}{body} {context}".strip()
-    anchor = body[: split_at + 1]
-    rest = body[split_at + 2 :].strip()
-    if not rest:
-        return f"{prefix}{anchor} {context}".strip()
-    return f"{prefix}{anchor} {context} {rest}".strip()
+    return re.sub(
+        r"^(\[Generation \d+\]\s*)",
+        lambda m: m.group(1) + context + " ",
+        text,
+        count=1,
+    )
 
 
 def _reference_character_memory(ref_slots):

tests/test_dumas_h3_longvideos.py

@@ -536,7 +536,7 @@ class DumasH3LongVideosHelperTests(unittest.TestCase):
         self.assertIn("Persistent appearance for Mara: silver hair.", context)
         self.assertIn("Persistent wardrobe/style for Mara: red jacket.", context)
 
-    def test_reference_context_injects_after_anchor_sentence(self):
+    def test_reference_context_injects_immediately_after_generation_label(self):
         block = (
             "[Generation 1] Classic sitcom lighting and staging. "
             "Duke walks into the room."
@@ -547,8 +547,8 @@ class DumasH3LongVideosHelperTests(unittest.TestCase):
 
         self.assertEqual(
             result,
-            "[Generation 1] Classic sitcom lighting and staging. "
-            "Character facts for Duke: female, 25 years old. "
+            "[Generation 1] Character facts for Duke: female, 25 years old. "
+            "Classic sitcom lighting and staging. "
             "Duke walks into the room.",
         )