Sketch free-form curves: Ellipse (centre, major axis end, minor radius), Fit Point and Control Point (degree 3 and 5) Splines, Conic Curve (rho); solved like other curves (points on them, tangency at shared ends, drag fit points), profiled as polylines; mirror/pattern/move/scale copy them; Tangent Arc continues splines and conics

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/engine/src/tests.rs

@@ -276,6 +276,11 @@ fn hostile_params_never_panic() {
         "chain",
         "at",
         "curve",
+        "major",
+        "minor",
+        "minor_radius",
+        "apex",
+        "rho",
     ];
     let mut internal = Vec::new();
     for spec in command_specs() {