Add Dumas image compare node

README.md

@@ -4,6 +4,11 @@
 
 ## Included Nodes
 
+- `Dumas Image Compare`
+  - Inputs: optional `image1`, optional `image2`
+  - Outputs: `new image`
+  - Saves preview images for the built-in compare UI and passes through the second image when present, otherwise the first.
+
 - `Dumas JSON String to Object`
   - Input: `json_string`
   - Output: parsed `JSON`
@@ -144,6 +149,8 @@ decr  -> use index - 1
 
 `Dumas JSON Flatten` and `Dumas JSON Unflatten` use the same dot-path format as the other path-based nodes.
 
+`Dumas Image Compare` accepts one or two images. The `new image` socket forwards `image2` when connected so you can keep the "after" image moving through the workflow, and falls back to `image1` if only one input is present.
+
 ## Roadmap
 
 This repo is intended to grow into a broader set of Dumas-branded generic utility nodes, including JSON helpers and adjacent data-manipulation tools.