From 412133533ad1a8f65279e6c5944b222176337bba Mon Sep 17 00:00:00 2001
From: Jan Petykiewicz <jan@mpxd.net>
Date: Mon, 13 Jul 2026 23:07:37 -0700
Subject: [PATCH] [AutoTool] fix some masked errors

---
 masque/builder/tools.py               |  5 +---
 masque/test/test_autotool_planning.py | 37 +++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/masque/builder/tools.py b/masque/builder/tools.py
index 125140e..b5ca9ca 100644
--- a/masque/builder/tools.py
+++ b/masque/builder/tools.py
@@ -1190,10 +1190,7 @@ class AutoTool(Tool):
                 return Port((float(sbend_dxy[0]), float(jog)), rotation=pi, ptype=ptype)
         else:
             def endpoint_at(jog: float) -> Port:
-                out_port = endpoint(jog)
-                if not ptypes_compatible(out_port.ptype, ptype):
-                    raise BuildError('S-bend endpoint ptype does not match registered ptype')
-                return out_port
+                return endpoint(jog)
 
         for jog_domain in self._signed_jog_domains(jog_range):
             def data_at(jog: float) -> AutoTool.GeneratedData:
diff --git a/masque/test/test_autotool_planning.py b/masque/test/test_autotool_planning.py
index a0979ce..2a868fd 100644
--- a/masque/test/test_autotool_planning.py
+++ b/masque/test/test_autotool_planning.py
@@ -8,6 +8,7 @@ from numpy.testing import assert_allclose
 
 from masque.builder.tools import AutoTool, PrimitiveOffer, RenderStep, UOffer, circular_arc_sbend_endpoint
 from masque.builder.pather import Pather
+from masque.builder.error import ToolContractError
 from masque.library import Library
 from masque.pattern import Pattern
 from masque.ports import Port
@@ -522,6 +523,42 @@ def test_autotool_sbend_custom_endpoint_avoids_generator_during_planning() -> No
     assert data.mirrored is False
 
 
+def test_autotool_sbend_endpoint_ptype_mismatch_is_fatal() -> None:
+    def make_core_sbend(jog: float) -> Pattern:
+        return make_sbend(jog, ptype='core')
+
+    tool = (
+        AutoTool()
+        .add_straight(
+            lambda length: make_straight(length, ptype='core'),
+            'core',
+            'A',
+            )
+        .add_sbend(
+            make_core_sbend,
+            'core',
+            'A',
+            'B',
+            jog_range=(0, 20),
+            endpoint=lambda jog: Port((10, jog), pi, ptype='wrong'),
+            )
+        .add_sbend(
+            make_core_sbend,
+            'core',
+            'A',
+            'B',
+            jog_range=(0, 20),
+            )
+        )
+    pather = Pather(Library(), tools=tool, render='deferred')
+    pather.ports['A'] = Port((0, 0), 0, ptype='core')
+
+    with pytest.raises(ToolContractError, match='declared offer out_ptype'):
+        pather.jog('A', 4, length=20)
+
+    assert_allclose(pather.ports['A'].offset, (0, 0))
+
+
 def test_circular_arc_sbend_endpoint() -> None:
     endpoint = circular_arc_sbend_endpoint(radius=5, ptype="core")