From effb2443e7e8ff07a2430a569148933fbdc6b01b Mon Sep 17 00:00:00 2001
From: Edward Niewold <edward@niewold.com>
Date: Sat, 25 Apr 2026 16:53:35 +0200
Subject: [PATCH] v1.2.2 - Fixed a bug where inner node validation exception
 were raised due to removal of initial static output slots.

---
 README.md        |  1 +
 pyproject.toml   |  2 +-
 workflow_node.py | 31 +++++++++++++++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index b20e131..6727036 100644
--- a/README.md
+++ b/README.md
@@ -182,6 +182,7 @@ ComfyUI workflow JSON appears in a few different shapes depending on how it was
 
 ### Version History
 
+- v1.2.2 - Fixed a bug where inner node validation exception were raised due to removal of initial static output slots. 
 - v1.2.1 - Removed the maximum number of inputs and outputs on the `Subworkflow` node (was previously set to 8).
 - v1.2.0 - Added manual value entry for primitive `Subworkflow Input` input nodes on the `Subworkflow` node. Check README features section for details.
 - v1.1.0 - Added `Subworkflow Modifier`, `Subworkflow Modifier Source` (+ from URL) nodes. Combining these nodes in inner and outer workflows allows for circular links between an inner workflow input and output, without circular reference problems. 
diff --git a/pyproject.toml b/pyproject.toml
index 5666e22..a58058c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "comfyui-subworkflow"
-version = "1.2.1"
+version = "1.2.2"
 description = "Use ComfyUI workflows as reusable subworkflows via Subworkflow Input, Subworkflow Output, and Subworkflow nodes"
 license = { file = "LICENSE" }
 requires-python = ">=3.10"
diff --git a/workflow_node.py b/workflow_node.py
index 9a8a61f..492f8bc 100644
--- a/workflow_node.py
+++ b/workflow_node.py
@@ -21,6 +21,27 @@ from .workflow_utils import (
 log = configure_logger("ComfyUI-Subworkflow")
 
 
+class _UnboundedOutputTypes:
+    """Returns '*' for any slot index so validation never IndexErrors on dynamic outputs."""
+    def __getitem__(self, idx):
+        return "*"
+    def __len__(self):
+        return 0
+    def __iter__(self):
+        return iter(())
+
+
+class _UnboundedFalseSeq:
+    """Infinite False iterator so merge_result_data zips correctly for any output count."""
+    def __getitem__(self, idx):
+        return False
+    def __len__(self):
+        return 0
+    def __iter__(self):
+        while True:
+            yield False
+
+
 def _apply_primitive_overrides(data: dict, kwargs: dict) -> dict:
     """
     For INT/FLOAT inputs where the outer slot is not connected and the override
@@ -369,3 +390,13 @@ class SubworkflowModifierSourceFromURL(BaseSubworkflow):
         validate_workflow_nodes_installed(data)
         output_refs, graph = build_modifier_source_expansion(data, kwargs)
         return cls._finalize_execution(output_refs, graph, data, reload_each_execution)
+
+
+_DYNAMIC_RETURN = _UnboundedOutputTypes()
+for _cls in (Subworkflow, SubworkflowFromURL, SubworkflowModifierSource, SubworkflowModifierSourceFromURL):
+    # Pre-set so GET_SCHEMA() doesn't overwrite with the empty list that outputs=[] produces.
+    # Returning '*' for any slot index lets validation accept connections to any output slot.
+    _cls._RETURN_TYPES = _DYNAMIC_RETURN
+    _cls._RETURN_NAMES = []
+    _cls._OUTPUT_IS_LIST = _UnboundedFalseSeq()
+    _cls._OUTPUT_TOOLTIPS = []