Two songwriters are credited on Taylor Swift’s “august.”
The credited writers are Taylor Swift and Jack Antonoff. Their collaboration followed several earlier projects together, including work connected with 1989, Reputation, and Lover. On this track, Antonoff supplied the initial instrumental idea, while Swift wrote the lyrics.
The songwriting credit is distinct from the production credit. Swift and Antonoff produced the song with Joe Alwyn, so three people are associated with production even though only two are listed as songwriters.
Another possible source of confusion is Folklore’s wider creative team. Aaron Dessner produced many songs on the album and performed a major role in its sound, but he is not one of the two credited songwriters for “august.” The answer therefore refers specifically to the song’s official songwriting line.