The EU has now published (in the Official Journal) both the Withdrawal Agreement and the Political Declaration – here.
Accompanying this is an EU Council Decision – here.
A couple of points to make :
(1) ratification of the Withdrawal Agreement (the “deal”) is required by both the UK and the EU Parliaments,
(2) the Political Declaration is a non-binding legal statement of intent, that may form the basis for the EU-UK FTA,
(3) the Withdrawal Agreement (if ratified) provides for a transition period during which — notwithstanding all consequences of the United Kingdom’s withdrawal from the Union as regards the United Kingdom’s participation in the institutions, bodies, offices and agencies of the Union — Union law, including international agreements, will be applicable to and in the United Kingdom.
The Commission, on behalf of the Union and of Euratom, would therefore notify the other parties to these agreements that the United Kingdom is to be treated as a Member State for the purposes of those agreements during the transition period.