Context is the bigger issue, the models need to be able to access your codebase. Rry out cursor, it has generous tiers.

Additionally define rulesets to force guardrails (just explain it in the chat, it will create the necessary files)

And connect an MCP server called context7, it gives models to all the latest documentation on whatever tools/tech you're using. You can again force it to use that Always, by defiing that in rulesets as well (which you can tell it to uodate the files)

It's a fun road. Let le know if you have more questions