i wanted to build a formatter for my postgres language server but always knew i would never have the time for it. when claude code first came out, i gave it a shot, but it was too inconsistent and still needed too much handholding. i retried it again at the beginning of this year. like before, i set up the harness to run overnight, expecting to throw it away the next morning. but nope, it deliberately worked through all the syntax nodes and followed patterns closely enough so that a few hours of my work could make it ready for the pr.