Update strip iteration suffix behavior

README.md

@@ -29,7 +29,7 @@
 - `Dumas Strip Iteration Suffix`
   - Input: `filename`
   - Output: cleaned `STRING`
-  - Removes a trailing `_<digits>` iteration suffix before the file extension, for example `asset_003.png -> asset.png`.
+  - Removes the final underscore segment before the file extension, for example `asset_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` only strips a final numeric suffix. Names like `my_asset_final.png` are left untouched, while `my_asset_012.png` becomes `my_asset.png`.
+`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 Slugify String` lowercases text, strips accents, replaces non-alphanumeric runs with `-`, and trims leading or trailing dashes.
 

dumas_json_nodes.py

@@ -254,10 +254,7 @@ def _strip_iteration_suffix(value):
     if "_" not in root:
         return value
 
-    prefix, suffix = root.rsplit("_", 1)
-    if not suffix.isdigit():
-        return value
-
+    prefix, _suffix = root.rsplit("_", 1)
     return f"{prefix}{extension}"
 
 

tests/test_dumas_json_nodes.py

@@ -57,12 +57,19 @@ class DumasJSONNodeTests(unittest.TestCase):
 
         self.assertEqual(result, ("asset_build",))
 
-    def test_strip_iteration_suffix_leaves_names_without_numeric_suffix_unchanged(self):
+    def test_strip_iteration_suffix_removes_last_underscore_segment_even_when_not_numeric(self):
         node = DumasStripIterationSuffixNode()
 
         result = node.strip_iteration_suffix("my_asset_final.png")
 
-        self.assertEqual(result, ("my_asset_final.png",))
+        self.assertEqual(result, ("my_asset.png",))
+
+    def test_strip_iteration_suffix_leaves_names_without_underscore_unchanged(self):
+        node = DumasStripIterationSuffixNode()
+
+        result = node.strip_iteration_suffix("char123.png")
+
+        self.assertEqual(result, ("char123.png",))
 
     def test_slugify_string_normalizes_text(self):
         node = DumasSlugifyStringNode()