diff --git a/component_planning.py b/component_planning.py
index 7ac0911..e7da7f0 100644
--- a/component_planning.py
+++ b/component_planning.py
@@ -178,10 +178,16 @@ def _build_component_plan(
             if source in boundary_outputs_by_source:
                 continue
             output_name = output_names[output_index]
+            effective_io_type = _remote_output_io_type(
+                prompt=prompt,
+                node_id=node_id,
+                output_index=output_index,
+                nodes_module=nodes_module,
+            ) or str(io_type)
             boundary_outputs_by_source[source] = BoundaryOutputSpec(
                 proxy_output_name=f"{node_id}_{output_name}",
                 source=source,
-                io_type=str(io_type),
+                io_type=effective_io_type,
                 is_list=bool(output_is_list[output_index]),
                 preview_target_node_ids=_preview_target_node_ids(
                     prompt=prompt,
diff --git a/remote_graph_analysis.py b/remote_graph_analysis.py
index 4ef847c..e870d1b 100644
--- a/remote_graph_analysis.py
+++ b/remote_graph_analysis.py
@@ -85,6 +85,7 @@ _LOCAL_ONLY_REMOTE_CLASS_TYPES = frozenset(
 _TRANSPORTABLE_OUTPUT_TYPES = frozenset(
     {
         "*",
+        "COMFY_MATCHTYPE_V3",
         "AUDIO",
         "BOOLEAN",
         "FLOAT",
@@ -578,7 +579,24 @@ def _remote_output_io_type(
     output_types, _, _ = _normalize_output_metadata(node_class)
     if output_index < 0 or output_index >= len(output_types):
         return None
-    return str(output_types[output_index])
+    io_type = str(output_types[output_index])
+    if io_type not in {"*", "COMFY_MATCHTYPE_V3"}:
+        return io_type
+
+    # V3 dynamic nodes expose a generic output in their class metadata. Resolve
+    # the concrete type from the linked input before validating a component edge.
+    for input_value in (prompt_node.get("inputs") or {}).values():
+        if not _is_link(input_value):
+            continue
+        resolved_type = _remote_output_io_type(
+            prompt=prompt,
+            node_id=str(input_value[0]),
+            output_index=int(input_value[1]),
+            nodes_module=nodes_module,
+        )
+        if resolved_type is not None and resolved_type != "COMFY_MATCHTYPE_V3":
+            return resolved_type
+    return io_type
 
 
 def _remote_output_is_list(
diff --git a/tests/test_remote_graph_analysis.py b/tests/test_remote_graph_analysis.py
index c2a08f3..4912e2c 100644
--- a/tests/test_remote_graph_analysis.py
+++ b/tests/test_remote_graph_analysis.py
@@ -4,6 +4,38 @@ from __future__ import annotations
 
 from api_intercept_test_support import *  # noqa: F401,F403
 
+
+def test_dynamic_match_type_output_resolves_from_linked_image(
+    remote_graph_analysis_module: Any,
+) -> None:
+    """V3 dynamic resize outputs should cross boundaries as their concrete image type."""
+    class ImageSource:
+        RETURN_TYPES = ("IMAGE",)
+
+    class DynamicResize:
+        RETURN_TYPES = ("COMFY_MATCHTYPE_V3",)
+
+    prompt = {
+        "1": {"class_type": "ImageSource", "inputs": {}},
+        "2": {"class_type": "ResizeImageMaskNode", "inputs": {"input": ["1", 0]}},
+    }
+    nodes_module = SimpleNamespace(
+        NODE_CLASS_MAPPINGS={
+            "ImageSource": ImageSource,
+            "ResizeImageMaskNode": DynamicResize,
+        }
+    )
+
+    assert remote_graph_analysis_module._remote_output_io_type(
+        prompt=prompt,
+        node_id="2",
+        output_index=0,
+        nodes_module=nodes_module,
+    ) == "IMAGE"
+    assert remote_graph_analysis_module._is_transportable_output_type(
+        "COMFY_MATCHTYPE_V3"
+    )
+
 def test_remote_partition_preserves_dag_around_ssh_only_llm(
     api_intercept_module: Any,
     remote_graph_analysis_module: Any,