Robert Craft, an orchestral conductor, scholar and writer who was called an elegant Boswell by his supporters and a calculating Svengali by his detractors for his long professional association with Igor Stravinsky, died on Tuesday at his home in Gulf Stream, Fla. He was 92.

His wife, Alva, confirmed his death.

Mr. Craft spent nearly a quarter-century as Stravinsky’s amanuensis, rehearsal conductor, musical adviser, globe-trotting traveling companion and surrogate son. After Stravinsky’s death in 1971, at 88, he was a writer, lecturer, conductor, public intellectual and keeper of the Stravinskian flame.

He was the author of many books about Stravinsky; the co-author of a series of book-length dialogues with him, including “Conversations With Igor Stravinsky” (1959), “Memories and Commentaries” (1960) and “Retrospectives and Conclusion” (1969); and the editor of several volumes of Stravinsky’s correspondence.

As a conductor, Mr. Craft led some of the world’s foremost orchestras, among them the New York Philharmonic, the Chicago Symphony, the Philadelphia Orchestra and the Royal Philharmonic of London.