diff --git a/nodes.py b/nodes.py
index d7d8109..b32f82b 100644
--- a/nodes.py
+++ b/nodes.py
@@ -24,6 +24,22 @@ def _create_webp_metadata(img, prompt, extra_pnginfo):
 
 
 class SaveImageAsSDWebUI:
+    """Save images in SD WebUI style with date-based subfolders and workflow metadata.
+
+    Prefix rules (output_dir = ComfyUI/output):
+      "txt2img/"          -> output/txt2img/{date}/00001-seed.ext
+      "abc"               -> output/{date}/abc00001-seed.ext
+      "imgEdit/qwen"      -> output/imgEdit/{date}/qwen00001-seed.ext
+      ""                  -> output/{date}/00001-seed.ext
+      "abc/def/"          -> output/abc/def/{date}/00001-seed.ext
+      "abc/def/114514"    -> output/abc/def/{date}/11451400001-seed.ext
+
+    {date} = yyyy-mm-dd, always the direct parent folder of the file.
+    Slash at end = directory only, no filename prefix.
+    No slash = filename prefix only, no subdirectory.
+    Middle slash(s) = nested directories above date folder.
+    """
+
     def __init__(self):
         self.output_dir = folder_paths.get_output_directory()
         self.type = "output"
@@ -35,7 +51,17 @@ class SaveImageAsSDWebUI:
             "required": {
                 "images": ("IMAGE", {"tooltip": "The images to save."}),
                 "seed": ("INT", {"default": 0, "min": 0, "max": 0xffffffffffffffff, "tooltip": "Seed value used in the filename."}),
-                "filename_prefix": ("STRING", {"default": "ComfyUI", "tooltip": "Prefix for the filename. Can include path separators (e.g. 'comfy-txt2img/') for subdirectory classification."}),
+                "filename_prefix": ("STRING", {"default": "ComfyUI", "tooltip": (
+                    "Filename prefix and/or output subdirectory.\n"
+                    "A date folder (yyyy-mm-dd) is always created as the direct parent.\n\n"
+                    "Examples (output dir = ComfyUI/output):\n"
+                    "  'txt2img/'       -> output/txt2img/{date}/00001-seed.ext\n"
+                    "  'abc'            -> output/{date}/abc00001-seed.ext\n"
+                    "  'imgEdit/qwen'   -> output/imgEdit/{date}/qwen00001-seed.ext\n"
+                    "  ''               -> output/{date}/00001-seed.ext\n"
+                    "  'abc/def/'       -> output/abc/def/{date}/00001-seed.ext\n"
+                    "  'abc/def/114514' -> output/abc/def/{date}/11451400001-seed.ext"
+                )}),
                 "image_format": (["png", "jpg", "webp"], {"default": "png", "tooltip": "Image save format."}),
                 "quality": ("INT", {"default": 100, "min": 0, "max": 100, "tooltip": "Save quality for JPG/WebP formats (0-100). Ignored for PNG."}),
             },