The Case of the Phantom NUL Byte: A Two-Day Deep Dive Into a Business Central Platform Bug

Or: how a single stray 0x00 byte cost me roughly 10% of my monthly AI token budget, three wrong hypotheses, and two days of my life — and how it was never the bug I thought it was. Twice. Chapter 1: “Invalid header line: \u0000” It started, as these things do, with an error message that looked ... Read more