The most effective way I've found to use Claude to get better at writing:

Paste in a bunch of chapters or articles.

It can accept ~350 pages of input, so go crazy.

Ask it which chapter or article is the best and to explain why it's the best.

Keep asking follow up questions and build a list of all the reasons it's strong. Feel free to add your own.

Use those answers to build out a list of guidelines to emulate your writing style, like:

• It's extremely important that you do a mix of dialogue, action, description, and interiority. Never focus too heavily on one of them at the expense of the others.

• While being vivid, be concise. You should not have more than two sentences in a row of description. Never use flowery language.

• Beneath the scientific premise, there is an emotional core. You should imbue the story with poignant emotion underlying the ideas.

• The story is well-paced, with a mix of faster-paced dialogue and slower moments of introspection or description. Vary the pacing to build a page-turning yet thoughtful read.

Then make one mega prompt that combines your best chapter / article with all of those guidelines, and ask it for feedback on a new article or chapter based on all of those criteria.

It will tell you where your other work is falling short so you can improve it, but that feedback will be based on your best work.

It will help you be a better version of whatever kind of writer you are.