Kernel rig: construction cases, where two edges meet or come closest, and parallel edges refused

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/kernel-cases/construction/cov-point-two-edges-meeting/expected.json

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+{
+ "sources": [],
+ "what": "where two box edges meet",
+ "source": "analytic",
+ "method": "box 40 x 30 x 20 with a corner at the origin (x 0..40, y 0..30, z 0..20): y 0, z 0 along X and x 40, z 0 along Y meet at (40,0,0)",
+ "construction": {
+  "P": {
+   "point": [
+    40,
+    0,
+    0
+   ]
+  }
+ }
+}

tests/kernel-cases/construction/cov-point-two-edges-meeting/recipe.json

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+{
+ "commands": [
+  {
+   "command": "solid.box",
+   "params": {
+    "length": 40,
+    "width": 30,
+    "height": 20,
+    "body_name": "Box"
+   }
+  },
+  {
+   "command": "construct.point.two_edges",
+   "params": {
+    "a": {
+     "edge": [
+      20,
+      0,
+      0
+     ]
+    },
+    "b": {
+     "edge": [
+      40,
+      15,
+      0
+     ]
+    },
+    "name": "P"
+   }
+  }
+ ]
+}

tests/kernel-cases/construction/cov-point-two-edges-refuses-parallel-edges/expected.json

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+{
+ "sources": [],
+ "what": "two parallel box edges",
+ "source": "analytic",
+ "method": "box 40 x 30 x 20 with a corner at the origin (x 0..40, y 0..30, z 0..20): the edges y 0, z 0 and y 30, z 0 both run along X: they never meet nor have one closest point: refused",
+ "outcome": "refused",
+ "refusal": "the edges are parallel"
+}

tests/kernel-cases/construction/cov-point-two-edges-refuses-parallel-edges/recipe.json

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+{
+ "commands": [
+  {
+   "command": "solid.box",
+   "params": {
+    "length": 40,
+    "width": 30,
+    "height": 20,
+    "body_name": "Box"
+   }
+  },
+  {
+   "command": "construct.point.two_edges",
+   "params": {
+    "a": {
+     "edge": [
+      20,
+      0,
+      0
+     ]
+    },
+    "b": {
+     "edge": [
+      20,
+      30,
+      0
+     ]
+    },
+    "name": "P"
+   }
+  }
+ ]
+}

tests/kernel-cases/construction/cov-point-two-edges-skew/expected.json

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+{
+ "sources": [],
+ "what": "where two skew box edges come closest",
+ "source": "analytic",
+ "method": "box 40 x 30 x 20 with a corner at the origin (x 0..40, y 0..30, z 0..20): y 0, z 0 along X and x 40, z 20 along Y come closest at (40,0,0) and (40,0,20): the point halfway between, (40,0,10)",
+ "construction": {
+  "P": {
+   "point": [
+    40,
+    0,
+    10
+   ]
+  }
+ }
+}

tests/kernel-cases/construction/cov-point-two-edges-skew/recipe.json

@@ -0,0 +1,33 @@
+{
+ "commands": [
+  {
+   "command": "solid.box",
+   "params": {
+    "length": 40,
+    "width": 30,
+    "height": 20,
+    "body_name": "Box"
+   }
+  },
+  {
+   "command": "construct.point.two_edges",
+   "params": {
+    "a": {
+     "edge": [
+      20,
+      0,
+      0
+     ]
+    },
+    "b": {
+     "edge": [
+      40,
+      15,
+      20
+     ]
+    },
+    "name": "P"
+   }
+  }
+ ]
+}