immediately preceding post, the European Commission has given its view that "sufficient progress" has been made in Phase 1 of the Brexit negotiations. The agreement came following an intense few days of negotiations. See Joint Report.
See also statement 8th December by Michel Barnier
The following material is also of importance:
Prime Minister's commitments to Northern Ireland
Example case studies: EU citizens' rights in the UK
Status of EU citizens in the UK: what you need to know
Statement 8th December by Donald Tusk (European Council President) on Draft Guidelines for Phase 2