The ~PDF authoring surface.

defmodule MyDoc do
  use Mead.Component

  attr :title, :string, required: true
  slot :inner_block

  def panel(assigns) do
    ~PDF"""
    <view padding="10" background="#EEF1FA" gap="6">
      <text font_size="14" color="#283C86">{@title}</text>
      {render_slot(@inner_block)}
    </view>
    """
  end
end

Mead.render(MyDoc.panel(%{title: "Hello", inner_block: []}))

use Mead.Component pulls in Phoenix.Component (for attr/slot declarations and their compile-time validation) and the ~PDF sigil.

Attributes are string-typed and CSS-like; see Mead.Markup for the accepted values. Templates compile through Phoenix.LiveView.TagEngine with Mead.TagHandler, so unknown tags and malformed component calls are compile-time errors.