fix(physics): preserve retail edge-slide stop semantics

docs/research/2026-07-30-response-layer-edge-family-pseudocode.md

@@ -1110,4 +1110,27 @@ rejects a greater-than-15-tick frozen streak. The earlier dedicated
 `Ts4SteepRoofWedgeCaptureTests` remains green, so retiring these four
 compensations did not require weakening or deleting the TS-4 control.
 
+### Corrective review: edge_slide has two outputs
+
+The first Slice 1B commit collapsed `CTransition::edge_slide`'s function
+return into its out `TransitionState`. That loses a material retail case:
+the steep-contact branch writes the result of `cliff_slide` to the out state
+but returns false independently. A degenerate/parallel CliffSlide therefore
+writes `OK_TS` **and still tells `transitional_insert` to continue its outer
+retry**. Branch 1 and the contact-without-remembered-walkable branch stop with
+`OK_TS`; a `COLLIDED_TS` Precipice result stops; `SLID_TS` and `ADJUSTED_TS`
+retain their ordinary retry handling.
+
+The corrective implementation preserves this exact bool-plus-out-state seam.
+Its end-to-end test drives an invalid-contact StepDown probe into a steep,
+parallel-last-known CliffSlide, then proves a second outer object pass occurs
+before success. The roof controls were also hardened: the flat-roof fixture
+must first land and publish its persistent contact/walkable chronology, fails
+its control arm when the roof is removed, and proves outward-X rejection plus
+continued edge tangency. The steep-roof fixture now rejects non-finite or
+oversized frame steps and signed-plane penetration until polygon exit. Parsed
+graph and prepared-flat runs compare every `ResolveResult` field and every
+persistent `PhysicsBody` field by raw float/double bits, including the ordered
+walkable vertex payload.
+
 ---