Simplify accumulator variant collection

README.md

@@ -120,9 +120,20 @@ you want to update each iteration. They are separate from the collector and grow
 dynamically in the UI as you connect them.
 
 `SxCP Accumulator` stores outputs across executions under a `store_key` or the
-node id. Put it after an image-producing step inside or after a loop, connect the
-generated `image`, and connect `For Loop Start.index` to `entry_id` when you want
-reruns to replace the same row instead of appending duplicates. Its outputs are:
+node id. Put it after an image-producing step inside or after a loop and connect
+the generated `image`.
+
+For camera/pose tuning, leave `action=append_variant`. Every rerun is kept as a
+new variant, so you can regenerate row 1 several times without managing ids. If
+you connect `For Loop Start.index` to `entry_id`, variants are labelled by row
+internally; they still append instead of replacing.
+
+For deterministic loop resume/dedupe, set `action=replace_by_entry_id` and
+connect `For Loop Start.index` to `entry_id`. Optional `entry_tag` lets multiple
+branches share the same row index without overwriting each other, such as
+`soft`, `hard`, or `upscale`.
+
+Its outputs are:
 
 - `collection`: all stored values, or images when no explicit `value` is wired.
 - `image_batch`: all stored images as one ComfyUI image batch when they share