WillTools 2026-09-09 -- clean snapshot of the development repo for review

History-free snapshot of the private development repository at cbe45c5
(2026-09-09). Code, docs and public catalogue only; no plant or job
knowledge layers, no client or job names (tools/scrub.py clean). The
intro deck is left out of this snapshot because its slide images could
not be checked for job drawings.

WillTools.extension/tests/test_liftexport_section.py

@@ -0,0 +1,65 @@
+# -*- coding: utf-8 -*-
+"""`liftexport.section_from_profile`: Solid or Sandwich from a measured
+thickness profile. The profiles here are the ones measured live on
+2026-09-03 with `section_profile` (a 6 x 6 grid of thickness-axis lines):
+two insulated pieces read 3 / 4 / 4 and 4 / 4 / 3 in, a solid piece 8 in,
+where the per-solid extents had said 0-11 / 0-7 (no gap at all)."""
+import pytest
+
+from vibe import liftexport
+
+
+def test_three_four_four_is_a_sandwich():
+    out = liftexport.section_from_profile([(0.0, 3.0, 1), (7.0, 11.0, 0)])
+    assert out == {'section_type': 'Sandwich', 'wythe_top_in': 3.0,
+                   'insulation_in': 4.0, 'wythe_bottom_in': 4.0}
+
+
+def test_four_four_three_keeps_top_and_bottom_apart():
+    out = liftexport.section_from_profile([(0.0, 4.0, 0), (8.0, 11.0, 1)])
+    assert out['wythe_top_in'] == 4.0
+    assert out['wythe_bottom_in'] == 3.0
+    assert out['insulation_in'] == 4.0
+
+
+def test_one_interval_is_solid():
+    assert liftexport.section_from_profile([(0.0, 8.0, 0)]) == {}
+
+
+def test_empty_profile_is_could_not_tell():
+    assert liftexport.section_from_profile([]) == {}
+    assert liftexport.section_from_profile(None) == {}
+
+
+def test_touching_solids_merge_into_one_pour():
+    # A ledge drawn as its own solid: 0-8 and 8-10 touch, no insulation.
+    assert liftexport.section_from_profile([(0.0, 8.0, 0), (8.0, 10.0, 1)]) == {}
+
+
+def test_overlapping_intervals_merge():
+    assert liftexport.section_from_profile([(0.0, 8.0, 0), (6.0, 10.0, 1)]) == {}
+
+
+def test_hairline_gap_is_not_insulation():
+    assert liftexport.section_from_profile([(0.0, 4.0, 0), (4.3, 8.0, 1)]) == {}
+
+
+def test_three_layers_split_at_the_largest_gap():
+    # Wythe + a touching thickened zone, gap, wythe: the merge keeps the
+    # thickened zone with its wythe and the split lands on the 4 in gap.
+    out = liftexport.section_from_profile(
+        [(0.0, 3.0, 0), (3.0, 4.0, 2), (8.0, 11.0, 1)])
+    assert out['wythe_top_in'] == 4.0
+    assert out['insulation_in'] == 4.0
+    assert out['wythe_bottom_in'] == 3.0
+
+
+def test_zero_thickness_interval_is_ignored():
+    out = liftexport.section_from_profile(
+        [(0.0, 3.0, 0), (5.0, 5.0, 2), (7.0, 11.0, 1)])
+    assert out['wythe_top_in'] == 3.0
+    assert out['wythe_bottom_in'] == 4.0
+
+
+def test_unreadable_interval_is_could_not_tell():
+    assert liftexport.section_from_profile([('x', 3.0, 0), (7.0, 11.0, 1)]) == {}