[gutafoki]

I am surprised by all the answers saying 0 percent. I'd understand that if you use use it without any grounding or additional context. I am far faster with it, using one MCP server with docs and one for language specific features. If the code base is large enough, serena is a must have. I'd say about the same, groking an unknown code base is a lot faster, producing for something I am familiar with maybe 4-5x