The speaker used Opus 5.5, described at the time as a two-day-old model, to analyze intercepted Claude Code requests and inspect its system, planning, and compaction prompts.

“And so what I literally did is I took Opus 5.5, so this like, you know, model two days old, and was like, "This is... I intercepted those requests. Here's exactly what's going on. Here's the prompt. Here's the system prompt.”

“Here's the plan prompt. Here's the compaction prompt."”