Same router, same golden set, same red run: G4 FAIL, 3/4 — hold.
Now do the TDD move — change the router until the run is green. The
golden set is the spec; it doesn't move.
A registry 503 is transient infrastructure noise, same class as a timeout: the flake branch needs to recognize it.
Expected output:
G1 pass (got rerun)
G2 pass (got escalate)
G3 pass (got open_issue)
G4 pass (got rerun)
4/4 — ship
The break is on line 5 — but read the whole snippet first.