diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 4ae7458e4d38..2be6ba6790ed 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -229,6 +229,14 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
+      - name: update job environment
+        run: |
+          if [ ":$HOME" = : ]; then
+            # Keep the first two path components, e.g. /home/runner.
+            HOME="(pwd | sed -E 's#^(/[^/]+/[^/]+).*#\1#')"
+            echo "HOME=$HOME" >> "$GITHUB_ENV"
+          fi
+          echo "SLOGFILE=$HOME/test.slog" >> "$GITHUB_ENV"
       - name: free up disk space
         run: |
           # Workaround to provide additional free space for testing.
@@ -279,30 +287,57 @@ jobs:
       - name: run proposals tests
         run: yarn test
         working-directory: a3p-integration
-      - name: collect all core eval scripts
-        # Core eval scripts will be copied under /tmp/core_eval_scripts directory
-        # colons in the parent directory name will be replaced with dashes
+      - name: copy a3p-integration
+        if: (success() || failure())
         run: |
-          find . -type d -path "./a3p-integration/proposals/*/submission" | while read -r dir; do
-            # Get the parent directory name
-            parent_dir=$(basename "$(dirname "$dir")")
-            # Replace colons with dashes in the parent directory name
-            sanitized_parent_dir=${parent_dir//:/-}
-            # Create the destination directory under /tmp/core_eval_scripts if it doesn't exist
-            destination_dir="/tmp/core_eval_scripts/$sanitized_parent_dir"
-            mkdir -p "$destination_dir"
-            # Copy everything from the $dir to the destination directory
-            cp -r "$dir"/* "$destination_dir/"
-            echo "Copied contents of $dir to $destination_dir"
+          # Copy everything from a3p-integration to /tmp/export/a3p-integration
+          # except `node_modules` and `.yarn`, replacing colons in proposal
+          # directory names with dashes.
+          EXPORT_DIR='/tmp/export'
+          rm -rf "$EXPORT_DIR/a3p-integration"
+          # Because of the exclusions, copying applies to disjoint subtrees of a3p-integration:
+          # * children except `agoric-sdk` and `proposals`
+          # * file children of `proposals`, i.e. `proposals/*`
+          # * grandchildren of `proposals`, i.e. `proposals/*/*`
+          #
+          # We accomplish this by consuming (subdir?, depth, `find` filter?) tuples.
+          SUBSEP="$(printf '\034')"
+          printf "    $SUBSEP 1 $SUBSEP -not -name agoric-sdk -not -name proposals
+            proposals $SUBSEP 1 $SUBSEP -type f
+            proposals $SUBSEP 2
+          " \
+          | sed -E 's/^ *|#.*//g; /^[[:space:]]*$/d;' \
+          | while IFS="$SUBSEP" read subdir depth filter; do
+            find a3p-integration/$subdir -mindepth ${depth:-1} -maxdepth ${depth:-1} \
+              -name node_modules -prune -o -name .yarn -prune -o $filter -print \
+            | while read -r path; do
+              dirname="$(dirname -- "$path")"
+              dest="$EXPORT_DIR/$dirname" # $dirname already starts with a3p-integration
+              sanitized="${dest//:/-}"
+              mkdir -p "$sanitized"
+              cp -r -- "$path" "$sanitized/"
+              echo "Copied $dirname to $sanitized"
+            done \
+            | uniq
           done
-      - name: archive core eval scripts
-        # The core eval scripts can be found at the bottom of `Summary` page of
-        # `Integration tests` workflow once the workflow is completed.
-        # Ref: https://github.com/actions/upload-artifact?tab=readme-ov-file#where-does-the-upload-go
+      # Artifacts can be found at the bottom of `Summary` page of
+      # `Integration tests` workflow once the workflow is completed.
+      # Ref: https://github.com/actions/upload-artifact?tab=readme-ov-file#where-does-the-upload-go
+      - name: archive a3p-integration
+        if: (success() || failure())
+        uses: actions/upload-artifact@v4
+        with:
+          name: a3p-integration
+          path: /tmp/export/a3p-integration
+      - name: archive slogfile
+        if: (success() || failure())
         uses: actions/upload-artifact@v4
         with:
-          name: core-eval-scripts
-          path: /tmp/core_eval_scripts
+          name: slogfile
+          path: ${{ env.SLOGFILE }}
+          # To help with debugging, retain slogfiles for 4 days after success
+          # or 10 days after failure.
+          retention-days: ${{ success() && 4 || 10 }}
       - name: notify on failure
         if: failure() && github.event_name != 'pull_request'
         uses: ./.github/actions/notify-status
diff --git a/a3p-integration/package.json b/a3p-integration/package.json
index c0aac139b141..ad61ebdafb43 100644
--- a/a3p-integration/package.json
+++ b/a3p-integration/package.json
@@ -13,7 +13,7 @@
     "doctor": "yarn synthetic-chain doctor"
   },
   "dependencies": {
-    "@agoric/synthetic-chain": "^0.3.0",
+    "@agoric/synthetic-chain": "^0.4.0",
     "@types/better-sqlite3": "^7.6.11"
   },
   "packageManager": "yarn@4.5.1",