Anthropic silently enrolled my Claude Code install in an A/B experiment, overrode my settings, and updated the CLI even with auto-updates disabled

I'm a senior developer and I was finishing up a rush project for a client this evening. I use a custom launcher that wraps the native Claude launcher and injects several features Anthropic has removed or broken, including thinking summaries ( --thinking-display summarized ). I use the launcher with both the CLI and VS Code. My Claude Code setup was working normally, then mid-evening, Opus 4.8 thinking summaries stopped appearing. This was especially odd since I have all auto-update settings turned off for b