Keep folder prefix in strip iteration node

README.md

@@ -29,7 +29,7 @@
 - `Dumas Strip Iteration Suffix`
   - Input: `filename`
   - Output: cleaned `STRING`
-  - Removes the final underscore segment before the file extension, for example `asset_003.png -> asset.png` and `char123_pose.png -> char123.png`.
+  - Keeps only the part before the first underscore, for example `asset_build_003.png -> asset.png` and `char123_pose.png -> char123.png`.
 
 - `Dumas Slugify String`
   - Input: `text`
@@ -170,7 +170,7 @@ decr  -> use index - 1
 
 `Save Image Dumas` leaves `folder` empty to use ComfyUI's output directory. `name` feeds `%input%` and `name_2` feeds `%input2%`, so a pattern like `project/%input%_%input2%_%counter%` can combine two upstream strings into the saved filename.
 
-`Dumas Strip Iteration Suffix` strips everything after the last underscore, plus that underscore itself. Names like `my_asset_final.png` become `my_asset.png`, while names with no underscore such as `char123.png` are left untouched.
+`Dumas Strip Iteration Suffix` keeps the part before the first underscore and drops the rest. Names like `char123_pose_final.png` become `char123.png`, while names with no underscore such as `char123.png` are left untouched.
 
 `Dumas Slugify String` lowercases text, strips accents, replaces non-alphanumeric runs with `-`, and trims leading or trailing dashes.
 

dumas_json_nodes.py

@@ -254,7 +254,7 @@ def _strip_iteration_suffix(value):
     if "_" not in root:
         return value
 
-    prefix, _suffix = root.rsplit("_", 1)
+    prefix, _suffix = root.split("_", 1)
     return f"{prefix}{extension}"
 
 

tests/test_dumas_json_nodes.py

@@ -43,26 +43,26 @@ class DumasJSONNodeTests(unittest.TestCase):
 
         self.assertEqual(result, ('{\n  "a": 2,\n  "b": 1\n}',))
 
-    def test_strip_iteration_suffix_removes_trailing_iteration_before_extension(self):
+    def test_strip_iteration_suffix_keeps_only_prefix_before_first_underscore(self):
         node = DumasStripIterationSuffixNode()
 
         result = node.strip_iteration_suffix("asset_build_003.png")
 
-        self.assertEqual(result, ("asset_build.png",))
+        self.assertEqual(result, ("asset.png",))
 
-    def test_strip_iteration_suffix_removes_trailing_iteration_without_extension(self):
+    def test_strip_iteration_suffix_keeps_only_prefix_without_extension(self):
         node = DumasStripIterationSuffixNode()
 
         result = node.strip_iteration_suffix("asset_build_003")
 
-        self.assertEqual(result, ("asset_build",))
+        self.assertEqual(result, ("asset",))
 
-    def test_strip_iteration_suffix_removes_last_underscore_segment_even_when_not_numeric(self):
+    def test_strip_iteration_suffix_removes_everything_after_first_underscore(self):
         node = DumasStripIterationSuffixNode()
 
-        result = node.strip_iteration_suffix("my_asset_final.png")
+        result = node.strip_iteration_suffix("char123_pose_final.png")
 
-        self.assertEqual(result, ("my_asset.png",))
+        self.assertEqual(result, ("char123.png",))
 
     def test_strip_iteration_suffix_leaves_names_without_underscore_unchanged(self):
         node = DumasStripIterationSuffixNode()