Record bounded placement clearance result and preserved quality regressions

2026-09-24 20:57:17 -07:00
parent 074051261a
commit ae9dad54b7
11 changed files with 1330 additions and 2 deletions
@@ -531,3 +531,18 @@ node interiors do not prove compatibility with our inflated obstacles and leads.
 Do not silently shorten those leads, move authored anchors, or persist external
 generated bends to make a comparison pass. Revisit engine integration only with
 a faithful geometry interface and observed usability benefit.
+
+## Lead compatibility does not establish layout quality — 2026-09-25
+
+The [bounded separation experiment](experiments/placement-clearance-20260925/results.md)
+at07405126 fixes the exact sparse mandatory-lead conflict by moving eight nodes
+down11 units. It removes NoClearPath and node penetration while preserving model
+records, anchors and repeated-call stability. Existing route-control output is
+byte-identical to released routing. However crossings20→22, shared length666→761
+and label/stroke intersections0→1 prevent a general readability improvement
+claim. Keep this flat-only repair isolated; do not connect it to production
+Arrange or increase its rounds to tune away the result. Use actual endpoint
+compatibility as a necessary placement constraint in a future initial coordinate
+assignment with connection ordering and corridor/label space. Compound geometry,
+automatic side changes and native tracing remain separate required evidence.
+This is branch-specific experimental evidence, not an integrated capability.