I've gone so far as to become frustrated with what I found in the open source options like Copilot and have been building my own custom extension, which is now

I've gone so far as to become frustrated with what I found in the open source options like Copilot and have been building my own custom extension, which is now better with gemini-3-flash than Copilot is with any model. Their prompt/context engineering is trash and their tools are not great