v4.0.3

Added

• Documentation pages that are finished can ask for their next piece. A Contribute
  component marks one specific, scoped improvement at the end of a page and links the issue that
  specifies it. It appears only on pages whose authoritative part is already written, so it
  invites an addition rather than standing in for missing documentation. Live on
  How Jack is built,
  Quickstart,
  Known Issues and
  Implementation notes.

Changed

• The README follows the landing page again. Jack is built with the three tools he actually
  has, the division of labour lists the six concerns AgentDeck owns rather than four, and his
  section links How Jack is built and
  Implementation notes ahead of the source directory.

Fixed

• The landing page's release chip said 4.0.1 on a 4.0.2 site. It now tracks the release it
  ships in.