Font design progress! Today's aha moment: I was using the GPT-5.5 Extra High Fast model to optimize the glyphs of the Luo font, but I just couldn't get it to a point where I was satisfied. In the end, the AI actually came up with a great idea on its own—directly generating diagnostic diagrams to let me see if it meets the goal. So smart, super clear and straightforward. Such a magical day, really interesting! Plus, this method can be reused for future optimization and debugging!