coremltools is the only way to run on ANE, so less of a trick and more of a requirement.

The tricks are more around optimizing for the hardware capabilities/constraints. For instance:

- conv2d is faster than linear (see Apple's post [0]) so you rewrite the model for that (example from the repo [1])

- inputs/outputs are static shapes, so KV cache requires some creativity (I wrote about that here [2])

- compute is float16 (not bfloat16) so occasionally you have to avoid activation overflows

[0]: https://machinelearning.apple.com/research/neural-engine-tra...

[1]: https://github.com/Anemll/Anemll/blob/4bfa0b08183a437e759798...

[2]: https://stephenpanaro.com/blog/kv-cache-for-neural-engine