What was the working title of J.K. Rowling’s first Harry Potter manuscript before publication?

The first Harry Potter manuscript was developed for publication as Harry Potter and the Philosopher’s Stone.

Rowling began writing the story in the early 1990s and completed the manuscript after years of work, including a period in Portugal and later time in Edinburgh. The novel was eventually accepted by Bloomsbury, which published it in the United Kingdom on 26 June 1997.

The title refers to the legendary substance sought by Nicolas Flamel and protected at Hogwarts. In the United States, the publisher changed the title to Harry Potter and the Sorcerer’s Stone, so bibliographic records and readers may encounter two names for the same first novel.

This answer is intentionally about the first manuscript’s published title rather than a supposed alternate title. Rowling’s early drafts and handwritten materials contain revisions, but the canonical book title is the Philosopher’s Stone title in the British edition.