Update reproduction instructions

code/README.md

@@ -8,7 +8,7 @@ The repository contains the model implementations (`bifurcation/`), configuratio
 
 ## Installation
 
-From the extracted code directory:
+From the code directory:
 
 ```bash
 uv sync
@@ -42,7 +42,7 @@ export EULER_DATA="$PWD/data/euler/data"
 export EULER_TRUTH_BANK="$PWD/data/euler/truth_bank"
 ```
 
-The other systems follow the same directory structure.
+The other systems follow the same directory structure. Their variables are `SQG_DATA`, `WAVES_DATA` (het-waves), `NLKG_DATA` (nonlinear-kg) and `PASSIVE_SCALAR_DATA`, each with the matching `_TRUTH_BANK` variable; every command also accepts `--data` and `--truth-bank` directly. `hf` is the Hugging Face CLI (`pip install -U huggingface_hub`, or run it without installing as `uvx --from huggingface_hub hf ...`).
 
 ## Reproducing the results