Use the repository’s closing date

Warning²Federal courts, Illinois courts22nd edition only

A repository citation closes on the date the repository was last accessed — or, where the citation pincites a file, on the date that code was last updated.¹

1. 1R. 18.11.2(b) Open source software.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.