How I tested the routing mod: every task ran twice, default and routed. A blind Opus judge with the repo open got both answers as X and Y in random order and checked every path, line number and config value. Full results, all three rounds: https://benenewton.com/blog/jev-agent-routing-claude-code?utm_source=threads&utm_medium=social&utm_campaign=every-claude-code-subagent-inherits-the-main-session-s-model-14
