Embed SillyTavern generation metadata

app.py

@@ -694,6 +694,7 @@ def default_loras():
 
 class DirectRequest(BaseModel):
     prompt: str
+    sillytavern: dict = Field(default_factory=dict)
     second_prompt: str = ""
     regions: list[RegionRequest] = Field(default_factory=list, max_length=3)
     regional_mode: str = REGIONAL_MODES[0]
@@ -2015,7 +2016,7 @@ def generate_images(request, from_api=True):
             second_style_image,
         )
 
-        metadata_config = request.model_dump()
+        metadata_config = request.model_dump(exclude={"sillytavern"})
         if request.style_images:
             metadata_config["style_images"] = [
                 f"style-reference-{index}.png"
@@ -2041,6 +2042,11 @@ def generate_images(request, from_api=True):
             ENVIRONMENT_START,
             REGIONAL_GLOBAL_STRENGTH,
         )
+        if request.sillytavern:
+            metadata["sillytavern"] = json.dumps(
+                request.sillytavern,
+                separators=(",", ":"),
+            )
         results = [
             Image.fromarray(
                 np.clip(item.detach().numpy() * 255, 0, 255).astype(np.uint8)