Sic a rival model on your code — a second opinion from a lineage that didn’t write the bug. Full build walkthrough with runnable code.
A model reviewing its own work brings its own blind spots to the inspection. This runner sends your git diff to a rival AI and returns named findings. It has caught real production bugs the original model swore weren’t there.
Read the full field guide — every scar, runnable code→24 interactive classes on shipping real tools with Claude Code and a terminal — the same process that built this shelf, not a drag-and-drop toy track.
Every class ends with a working artifact you keep. The proof it works? You're looking at it — this whole shelf was built that way.
See the 24 classes