Reverse Engineering Apple Pencil Pro motion telemetry
23/09/2026
Reverse engineering Apple Pencil Pro's undocumented 100 Hz HID motion telemetry, internal clocks, and estimating IMU geometry with an improvised pivot sweep.
Following Expert Cache Misses in ds4
22/09/2026
Notes from tracing cache misses, router state, latent sketches, and I/O scheduling in DeepSeek V4.1 SSD streaming.
Tracing a Numerical Bug in torch.linalg.matrix_exp
22/09/2026
How a float32 accuracy issue in Clifra led to a coefficient bug in PyTorch's matrix exponential implementation.