When revision has a co-writer

Revision is where a draft discovers what it is trying to do. An AI can offer another version quickly, but speed does not decide whether the version serves the piece.

The UNC Writing Center’s guide to revising drafts recommends reconsidering purpose, arguments, evidence, and the promises made to readers. It also recommends tracking and comparing versions. That is writing guidance, not proof that more rounds of AI revision improve every piece.

Here is a fully fictional example. A community theatre is announcing a Saturday performance of a short play about two siblings repairing an old bicycle. The audience is families who need the start time, venue, and a reason to attend. The author’s intended tone is warm and plain, and the announcement must fit in 60 words.

The draft says: “Two siblings find an old bicycle and discover that repairing it gives them a way to repair their quarrel. Join us Saturday at 2 p.m. in the Green Room for a warm, funny play about making something work again.”

An AI co-writer suggests making the opening more dramatic: “A broken bicycle carries two siblings toward a choice that could change everything.” That adds suspense, but it makes the story sound larger and darker than the author’s intended family tone. Another suggestion removes the phrase “warm, funny” to save space and keeps the time and venue.

I would reject the dramatic opening and accept the shorter description, because the second change protects the purpose while the first changes it. The selection principle is direct: keep a suggestion when it improves the draft within its audience, tone, length, and factual promises. Reject it when the improvement depends on changing one of those boundaries.

My revision habit is to state the purpose before inviting alternatives: family audience, warm tone, 60 words, Saturday at 2 p.m., Green Room. After each suggestion, compare the new version with that brief. Keep a version history so a persuasive detour can be reversed. If two suggestions solve different problems, accept one and explain why the other does not belong.

A co-writer can keep producing options. The author still has to choose the boundary of the piece. Revision is successful when the draft becomes more itself, not merely more changed.