I like the execution of your idea, but I'm not so sure about the idea itself. It seems the source code for any tool is not shown. I can't check it to make sure

I like the execution of your idea, but I'm not so sure about the idea itself. It seems the source code for any tool is not shown. I can't check it to make sure it works correctly, and I can't modify it or extend it. What if there's a bug?