Claude Code Review Report

[🤖] `#[backend_extension]`: autodiff ops only work on the first backend in the list

cpu backend: 18 backend tests fail, all backward passes with wrong gradient values

[🤖] Dispatch: Int/Bool results of autodiff-tracked ops report a plain device, then silently re-lift to autodiff on `.float()`

Vulkan stability problem while training with fusion

Reduce autotune with fusion panics for output position out of bounds

burn-cubecl-fusion: missing FloatKind::F64 arm causes panic with f64 precision on CPU backend

`burn-store`: CPU exhaustion via pickle memo bomb (exponential complexity) in PyTorch reader

Subtraction producing NaNs (f16-related)

RemoteBackend occur error