Copilot Put an Ad in My PR and Other Reasons to Switch

GitHub Copilot literally edited an advertisement into a developer's pull request this week — and that's somehow not even the most alarming Copilot story. We dig into GitHub's new policy to train on your code, the cache bugs silently inflating Claude Code API bills by 10-20x, and Boris Cherny's 15 hidden Claude Code features. This one's got receipts.