Add /forward_pass route + bundle transformer-explainer in preview

.github/workflows/preview-deploy.yml

@@ -166,6 +166,10 @@ jobs:
             ${{ env.IMAGE_NAME }}:pr-${{ steps.meta.outputs.preview_id }}
           build-args: |
             NEXT_PUBLIC_BACKEND_URL=https://${{ steps.meta.outputs.api_host }}
+            VITE_WORKBENCH_API=https://${{ steps.meta.outputs.api_host }}
+            VITE_USER_EMAIL=dev@localhost
+            TE_REPO=https://github.com/ndif-team/transformer-explainer.git
+            TE_REF=${{ vars.TRANSFORMER_EXPLAINER_REF || '7599b64dae7615039b6b1854af65cf3e4b73971b' }}
           cache-from: type=registry,ref=${{ env.IMAGE_NAME }}:buildcache
           cache-to: type=registry,ref=${{ env.IMAGE_NAME }}:buildcache,mode=max,image-manifest=true,oci-mediatypes=true
 

pyproject.toml

@@ -19,7 +19,10 @@ dependencies = [
     # Pulled in transitively by nnsight/nnterp, but pinned here so recent model
     # architectures land in our env: OLMo 3, recent Gemma, etc.
     "transformers>=5.11.0",
-    "nnsightful @ git+https://github.com/AdamBelfki3/nnsightful.git",
+    # Fork with the forward_pass payload trim (scores-only wire format).
+    # See ndif-team/transformer-explainer's deriveAttention.ts for the
+    # client-side derivation of masked + softmax views.
+    "nnsightful @ git+https://github.com/jon-bell/nnsightful.git@3204cba6a91763f03e9e9bd363f84dc69b04d7ed",
 ]
 
 [project.optional-dependencies]