Cursor (Claude behind the scenes) can do that, however as always, your mileage may vary.
I tried building a whole codebase inspector, essentially what you are referring to with Gemini's 2 million token context window but had troubles with their API when the payload got large. Just 500 error with no additional info so...
I've played around with Claude and larger docs and it's honestly been a bit of a crapshoot, it feels like only some of the information gets into the prompt as the doc gets larger. They're great for converting PDF tables to more usable formats though.
