fix prompt enhance api

Signed-off-by: Vladimir Mandic <mandic00@live.com>

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change Log for SD.Next
 
-## Highlights for 2026-08-23
+## Highlights for 2026-08-24
 
 Time for a new release, this is a larger one!
 Main focus is improving video workflows which also brings full support for new [MiniMax H3](https://vladmandic.github.io/sdnext-docs/MiniMax) and [LTXVideo-2.5](https://vladmandic.github.io/sdnext-docs/LTX)  
@@ -17,7 +17,7 @@ Plus quite a lot more, see full [changelog](https://github.com/vladmandic/automa
 
 [Home](https://vladmandic.github.io/sdnext/) | [ChangeLog](https://github.com/vladmandic/automatic/blob/master/CHANGELOG.md) | [Docs](https://vladmandic.github.io/sdnext-docs/) | [Discord](https://discord.com/invite/sd-next-federal-batch-inspectors-1101998836328697867) | [Sponsor](https://github.com/sponsors/vladmandic)  
 
-## Details for 2026-08-23
+## Details for 2026-08-24
 
 - **Models**
   - [MiniMax H3](https://huggingface.co/MiniMaxAI/MiniMax-H3) available in *base* and *ref* variants  

modules/api/process.py

@@ -219,10 +219,13 @@ class APIProcess:
         seed = req.seed or -1
         seed = processing_helpers.get_fixed_seed(seed)
         prompt = ''
-        from modules.scripts_manager import scripts_txt2img
+        from modules.scripts_manager import scripts_control
         default_model = 'google/gemma-3-4b-it' if req.type == 'image' else 'google/gemma-3-1b-it'
         model = default_model if req.model is None or len(req.model) < 4 else req.model
-        instance = [s for s in scripts_txt2img.scripts if 'prompt_enhance.py' in s.filename][0]
+        instance = [s for s in scripts_control.scripts if 'prompt_enhance_ext.py' in s.filename]
+        if len(instance) == 0:
+            raise HTTPException(status_code=500, detail="Prompt enhancement script not found")
+        instance = instance[0]
         prompt = instance.enhance(
             model=model,
             prompt=req.prompt,