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This does exist to some degree, as far as I understand, along the lines of style-transfer and ControlNet in visual domains. Anthropic has some research called "persona vectors" which effectively push generative behaviors toward or away from particular traits.

[0] https://www.anthropic.com/research/persona-vectors [1] https://arxiv.org/abs/2507.21509

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That's a fascinating paper you linked. A step further than the OP article.

Not quite a usable commercial writing tool like i want, but it shows that extracting and applying a vector of a concept to the embedding is very useful.

Its also a potentially a very effective AI alignment tool like anthropic mentioned. Steering or restricting the model embedding loop instead of convincing it with a convoluted system prompt.

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