doesn't work yet, but the structures are all there

readme.md

@@ -6,6 +6,10 @@ Original python is included in the repo for reference against bitrot.
 
 To use: `go run cmd/main.go input.txt`
 
-Differences between the Go and the Python:
+Differences between the Go and the Python, as well as notes more generally:
 
-* go is implemented as a package and, separately, as a command-line wrapper that calls it, just to keep the algorithm separate from the invocation details
+* The GPT is implemented as a package and, separately, as a command-line wrapper that calls it, just to keep the algorithm separate from the invocation details.
+* The Value class is more type-safe in go, using values everywhere as opposed to mingling floats and values in the localgrad tuple.
+* The Value struct has actual tests confirming the backward propagation logic.
+* When writing the Value struct and its methods, I accidentally swapped the order of the values in the `localGrads` slice in `Mul` and tore my hair out trying to figure out where the bug was. When I broke down and asked copilot to "compare these two implementations and tell me how they differ," it managed to find the error -- but also reported three non-existent differences and told me that `slices.Backward()` doesn't exist.
+* Initial pass translating the linear algebra functions has me worried that all those value structs aren't going to be very fast...