The project has 65k lines of code (plus another 11k of tests and tools), but a lot of the heavy lifting was done by LLMs with me providing them detailed problem statements, reviewing their work, and then having them fix/improve what they'd done. At this point I'd guess LLMs have built about 80%-85% of the code and I've built the rest. I've had to keep the architecture clean, however, because the LLMs have struggled with that.
I built the Metaphor prompting framework first, then worked my way up from there.
The project has been running for about a year, and I probably averaged about 40 hours a week, so something like 2000 hours so far.