That writing guide is exactly why this isn’t working. You’re thinking about this whole thing wrong, which I pointed out in another post. This isn’t a single prompt problem. You need to separate all of the parts of your process into components.

Having the Tense, Mystery and Restraint, and how to use Punctuation in a single prompt is pure insanity.

You need to have about a dozen different agents, each focused on a specific task, with one coming up with the Mystery ideas, grabbing character background and information from another, and a third writing the main plot points out. Then, once you have the plot points, an editor goes through and identifies issues for correction, where it goes back to those original agents for revision. Once that’s been sorted, a new agent can write the initial story out into more detail, and another agent goes through and confirms tense and punctuation is consistent.

All of these agents should have multiple examples of what they’re expected to be outputting.

AI isn’t smart. You need to make it smart by building it properly.

“I made a skill and use Style and project on Claude”

You definitely didn’t “do all that” with a single skill. “That” is not even a single agent.

You need to spend 10x more time setting it up than you do writing with it. The writing should be really fast once you get the architecture in place. Also, if you wrote the skill yourself, you’re doing that wrong too.

The problem is the process, not the model.

You can’t start by generating the actual text, it has to be an iterative process of setting up characters, timelines, plots, plans, etc. Then running a first pass for planning chapters, then running passes to generate the prose, then editing, revising, and verifying.