opencode/packages/css/components/divider.css

[data-component="divider"] {
  box-sizing: border-box;
  width: 100%;
  height: 1px;
  transform: scaleY(0.5);
  border: none;
  background: var(--oc-border-strong);
  flex: none;
  align-self: stretch;
  flex-grow: 0;
}