Add analytic derivatives and C1 tests for smooth_max/min/clamp, document epsilon/width guidance, and declare flow_regularization as the HX reference pattern without changing component physics. Co-authored-by: Cursor <cursoragent@cursor.com>
Add analytic derivatives and C1 tests for smooth_max/min/clamp, document epsilon/width guidance, and declare flow_regularization as the HX reference pattern without changing component physics. Co-authored-by: Cursor <cursoragent@cursor.com>