Joe Alwyn is credited as a producer on Taylor Swift’s “august” but not as a songwriter.
The song’s credited writers are Swift and Jack Antonoff. Its producers are Swift, Antonoff, and Alwyn, making the distinction between writing and producing important when identifying the credits.
Alwyn collaborated with Swift on several Folklore and Evermore recordings under the pseudonym William Bowery. However, the “august” credits specifically list Joe Alwyn as a producer. He is therefore a correct answer to a production question, but not to a question asking who co-wrote the song.
The track was created during the unusually collaborative Folklore sessions. Swift and Antonoff developed the song from an instrumental idea, while the final recording added layered guitars, keyboards, strings, and percussion. These details help explain why several collaborators are associated with the track even though their formal credits differ.