Claude Code?
Is that a typo?
You want to use an LLM. Not coding model.
If you want to do it, get into prompt engineering.
Take a wall of text from competitor site, ask AI to write a prompt for text like your competitor, then use that prompt to write content like your competitor.
You can modify prompt depending on your needs.
AI is good at reverse engineering everything. Trust me.
scalable system for producing large volumes
It's simple. Don't think of scale. Think of money. If one piece of content generates $1 a day, 10 thousand pieces generate $10k a day.
Don't start building based on a scalability fallacy. You can't scale something like that. Not really because you always have limited amount of keywords, topics, SERPs, credits limits, domains etc.
Nobody as of now has been able to build an infinitely scaling system. Not in this timeline and not in this universe.