diff --git a/examples/basic_graph/DataDep.java b/examples/basic_graph/DataDep.java
index 5fb2161..6a67f44 100644
--- a/examples/basic_graph/DataDep.java
+++ b/examples/basic_graph/DataDep.java
@@ -1,7 +1,6 @@
 package com.databuild.examples.basic_graph;
 
 public class DataDep {
-    private String depType;  // "query" or "materialize"
-    private String ref;
-    // getters, setters, constructors
+    public String depType;  // "query" or "materialize"
+    public String ref;
 }
diff --git a/examples/basic_graph/GenerateConfigure.java b/examples/basic_graph/GenerateConfigure.java
index 520bc04..f052dad 100644
--- a/examples/basic_graph/GenerateConfigure.java
+++ b/examples/basic_graph/GenerateConfigure.java
@@ -3,6 +3,8 @@ package com.databuild.examples.basic_graph;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.JsonNode;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.io.File;
 import java.util.Arrays;
 import java.util.Collections;
@@ -17,6 +19,7 @@ public class GenerateConfigure {
             System.err.println("Error: Partition ref is required");
             System.exit(1);
         }
+        List<JobConfig> configList = new ArrayList<>();
 
         // Process each partition ref from input arguments
         Arrays.stream(args).forEach(partitionRef -> {
@@ -25,18 +28,19 @@ public class GenerateConfigure {
             config.outputs = Collections.singletonList(partitionRef);
             config.args = Arrays.asList(partitionRef);
             // inputs and env are already initialized as empty collections in the constructor
-
-            try {
-                ObjectMapper mapper = new ObjectMapper();
-
-                // Convert config to JsonNode and serialize
-                JsonNode configNode = mapper.valueToTree(config);
-                String jsonConfig = mapper.writeValueAsString(configNode);
-                System.out.println(jsonConfig);
-            } catch (Exception e) {
-                System.err.println("Error: Failed to validate or serialize config: " + e.getMessage());
-                System.exit(1);
-            }
+            configList.add(config);
         });
+
+        try {
+            ObjectMapper mapper = new ObjectMapper();
+
+            // Convert config list to JsonNode and serialize
+            JsonNode configNode = mapper.valueToTree(configList);
+            String jsonConfig = mapper.writeValueAsString(configNode);
+            System.out.println(jsonConfig);
+        } catch (Exception e) {
+            System.err.println("Error: Failed to validate or serialize config: " + e.getMessage());
+            System.exit(1);
+        }
     }
 }
\ No newline at end of file
diff --git a/examples/basic_graph/JobConfig.java b/examples/basic_graph/JobConfig.java
index 5eb30cf..844ab53 100644
--- a/examples/basic_graph/JobConfig.java
+++ b/examples/basic_graph/JobConfig.java
@@ -9,7 +9,7 @@ import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
 
 @JsonAutoDetect(fieldVisibility = Visibility.ANY)
 public class JobConfig {
-    public List<String> inputs;
+    public List<DataDep> inputs;
     public List<String> outputs;
     public List<String> args;
     public Map<String, String> env;
diff --git a/examples/basic_graph/SumConfigure.java b/examples/basic_graph/SumConfigure.java
index 5430a72..ad96dc5 100644
--- a/examples/basic_graph/SumConfigure.java
+++ b/examples/basic_graph/SumConfigure.java
@@ -6,6 +6,9 @@ import com.fasterxml.jackson.databind.JsonNode;
 import java.io.File;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.stream.Collectors;
+
+import static com.databuild.examples.basic_graph.GenerateExecute.BASE_PATH;
 
 /**
  * Configure class for generating a random number.
@@ -19,12 +22,23 @@ public class SumConfigure {
         }
 
         String partitionRef = args[0];
-        String[] upstreams = partitionRef.split("_");
+        String[] pathParts = partitionRef.split("/");
+        String[] upstreams = Arrays.stream(pathParts[pathParts.length - 1].split("_"))
+                .map(part -> BASE_PATH + "generated_number/" + part)
+                .toArray(String[]::new);
 
         // Create and populate JobConfig object
         JobConfig config = new JobConfig();
         config.outputs = Collections.singletonList(partitionRef);
-        config.args = Arrays.asList(upstreams);
+        config.inputs = Arrays.stream(upstreams)
+                .map(upstream -> {
+                    DataDep dep = new DataDep();
+                    dep.depType = "materialize";
+                    dep.ref = upstream;
+                    return dep;
+                })
+                .collect(Collectors.toList());
+        config.args = Collections.singletonList(partitionRef);
         // Create a hashmap for env with {"OUTPUT_REF": "foo"}
         config.env = Collections.singletonMap("OUTPUT_REF", args[0]);
         // inputs and env are already initialized as empty collections in the constructor
@@ -33,7 +47,7 @@ public class SumConfigure {
             ObjectMapper mapper = new ObjectMapper();
 
             // Convert config to JsonNode and serialize
-            JsonNode configNode = mapper.valueToTree(config);
+            JsonNode configNode = mapper.valueToTree(Collections.singletonList(config));
             String jsonConfig = mapper.writeValueAsString(configNode);
             System.out.println(jsonConfig);
         } catch (Exception e) {
diff --git a/examples/basic_graph/job_lookup.py b/examples/basic_graph/job_lookup.py
index 00d0030..ead531e 100644
--- a/examples/basic_graph/job_lookup.py
+++ b/examples/basic_graph/job_lookup.py
@@ -12,6 +12,7 @@ def main():
 
     # Partition output prefix makes it obvious which job should fulfill
     for ref in output_refs:
+        print(ref, file=sys.stderr)
         body, tail = ref.rsplit("/", 1)
         if "generated_number" in body:
             result["//:generate_number_job"].append(ref)
diff --git a/examples/basic_graph/test/generate_number_test.sh b/examples/basic_graph/test/generate_number_test.sh
index b6c9176..fe1b35b 100755
--- a/examples/basic_graph/test/generate_number_test.sh
+++ b/examples/basic_graph/test/generate_number_test.sh
@@ -1,14 +1,15 @@
 #!/bin/bash
+set -e
 
 # Test configure
 generate_number_job.cfg pippin salem sadie
 
 # Test run
-generate_number_job.cfg pippin | generate_number_job.exec
+generate_number_job.cfg pippin | jq -c ".[0]" | generate_number_job.exec
+
 # Validate that contents of pippin is 43
 if [[ "$(cat /tmp/databuild/examples/basic_graph/generated_number/pippin)" != "43" ]]; then
   echo "Assertion failed: File does not contain 43"
   cat /tmp/databuild/examples/basic_graph/generated_number/pippin
   exit 1
 fi
-
diff --git a/examples/basic_graph/test/graph_test.sh b/examples/basic_graph/test/graph_test.sh
index 6e02e78..221cd54 100755
--- a/examples/basic_graph/test/graph_test.sh
+++ b/examples/basic_graph/test/graph_test.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 basic_graph.lookup /tmp/databuild/examples/basic_graph/generated_number/pippin_salem_sadie
 
diff --git a/examples/basic_graph/test/sum_test.sh b/examples/basic_graph/test/sum_test.sh
index 3ae6735..afbc81c 100755
--- a/examples/basic_graph/test/sum_test.sh
+++ b/examples/basic_graph/test/sum_test.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Test configure
 sum_job.cfg pippin_salem_sadie
@@ -7,11 +8,12 @@ sum_job.cfg pippin_salem_sadie
 echo -n 43 > /tmp/databuild/examples/basic_graph/generated_number/pippin
 echo -n 56 > /tmp/databuild/examples/basic_graph/generated_number/salem
 echo -n 40 > /tmp/databuild/examples/basic_graph/generated_number/sadie
-sum_job.cfg pippin_salem_sadie | sum_job.exec
+
+sum_job.cfg pippin_salem_sadie | jq -c ".[0]" | sum_job.exec
+
 # Validate that contents of pippin is 43
 if [[ "$(cat /tmp/databuild/examples/basic_graph/pippin_salem_sadie)" != "139" ]]; then
   echo "Assertion failed: File does not contain 139"
   cat /tmp/databuild/examples/basic_graph/sum/pippin_salem_sadie
   exit 1
 fi
-
diff --git a/examples/hello_world/configure.sh b/examples/hello_world/configure.sh
index 727014c..342c366 100755
--- a/examples/hello_world/configure.sh
+++ b/examples/hello_world/configure.sh
@@ -1,2 +1,2 @@
 # Create a test job config
-echo "{\"outputs\":[\"$1\"],\"inputs\":[],\"args\":[\"will\", \"build\", \"$1\"],\"env\":{\"foo\":\"bar\"}}"
+echo "[{\"outputs\":[\"$1\"],\"inputs\":[],\"args\":[\"will\", \"build\", \"$1\"],\"env\":{\"foo\":\"bar\"}}]"
diff --git a/examples/hello_world/test/test.sh b/examples/hello_world/test/test.sh
index 05c6b3f..7b98166 100755
--- a/examples/hello_world/test/test.sh
+++ b/examples/hello_world/test/test.sh
@@ -2,4 +2,4 @@
 
 test_job.cfg nice
 
-test_job.cfg cool | test_job.exec
+test_job.cfg cool | jq -c ".[0]" | test_job.exec
diff --git a/job/execute_wrapper.sh.tpl b/job/execute_wrapper.sh.tpl
index 9c4a3e8..63e9ff0 100755
--- a/job/execute_wrapper.sh.tpl
+++ b/job/execute_wrapper.sh.tpl
@@ -17,6 +17,23 @@ if [[ -z "$CONFIG_FILE" ]] || [[ "$CONFIG_FILE" == "-" ]]; then
     trap 'rm -f "$TMP_CONFIG"' EXIT
 fi
 
+# Use jq to validate the config file
+# First check if the file starts with { and ends with }
+if [[ $(head -c 1 "$CONFIG_FILE") != "{" ]] || [[ $(tail -c 2 "$CONFIG_FILE" | head -c 1) != "}" ]]; then
+    echo "The config file must be a non-empty JSON object:"
+    cat $CONFIG_FILE
+    exit 1
+fi
+
+# Then validate that it parses
+if ! $JQ 'type == "object"' $CONFIG_FILE > /dev/null 2>&1; then
+    echo "The config file must be a non-empty JSON object:"
+    cat $CONFIG_FILE 
+    exit 1
+fi
+
+# Should be a single JSON object
+
 # Extract and set environment variables from the config
 eval "$("$JQ" -r '.env | to_entries | .[] | "export " + .key + "=\"" + .value + "\""' "$CONFIG_FILE")"