diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index f9c6701..2b93aff 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -19,7 +19,17 @@ RUN wget https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz  && tar -xvf go${G
          mv go /usr/local && rm go${GO_VERSION}.linux-amd64.tar.gz
 ENV PATH=$PATH:/usr/local/go/bin:/home/vscode/go/bin
 
-RUN git clone https://github.com/flux-framework/flux-sched /opt/flux-sched
+# Testing grow/shrink from custom branch
+RUN git clone -b debug-resource-error-messages https://github.com/researchapps/flux-sched /opt/flux-sched
+# RUN git clone https://github.com/flux-framework/flux-sched /opt/flux-sched
+
+# We also need to rebuild into the system install
+# TODO remove this when it is added to production container
+ENV FLUX_SCHED_VERSION=0.39.0
+RUN cd /opt/flux-sched && \
+    cmake -B build && \
+    make -C build && \
+    make -C build install
 
 # Add the group and user that match our ids
 RUN groupadd -g ${USER_GID} ${USERNAME} && \
diff --git a/Makefile b/Makefile
index 4cd5472..7fe5586 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 HERE ?= $(shell pwd)
 LOCALBIN ?= $(shell pwd)/bin
 JGF ?= $(HERE)/cmd/test/data/tiny.json
+GROWJGF ?= $(HERE)/cmd/test/data/grow/new-nodes.json
 JOBSPECS ?= $(HERE)/cmd/test/data/jobspecs
 
 # This assumes a build in the .devcontainer Dockerfile environment
@@ -27,8 +28,8 @@ test-modules:
 	go test -v ./pkg/types
 
 .PHONY: test-binary
-test-binary: 	
-	LD_LIBRARY_PATH=$(LD_LIBRARY_PATH) $(LOCALBIN)/test --jgf=$(JGF) --jobspec=$(JOBSPECS)/test001.yaml
+test-binary: build
+	LD_LIBRARY_PATH=$(LD_LIBRARY_PATH) $(LOCALBIN)/test --jgf=$(JGF) --grow=$(GROWJGF) --jobspec=$(JOBSPECS)
 
 # test001_desc="match allocate 1 slot: 1 socket: 1 core (pol=default)"
 # test_expect_success "${test001_desc}" '
diff --git a/cmd/test/data/grow/new-nodes.json b/cmd/test/data/grow/new-nodes.json
new file mode 100644
index 0000000..cd0cfdc
--- /dev/null
+++ b/cmd/test/data/grow/new-nodes.json
@@ -0,0 +1,97 @@
+{
+    "graph": {
+        "nodes": [
+          {
+            "id": "0",
+            "metadata": {
+                "type": "cluster",
+                "basename": "tiny",
+                "name": "tiny0",
+                "id": 0,
+                "uniq_id": 0,
+                "rank": -1,
+                "exclusive": false,
+                "unit": "",
+                "size": 1,
+                "paths": {
+                    "containment": "/tiny0"
+                }
+            }
+        },
+        {
+            "id": "1",
+            "metadata": {
+                "type": "rack",
+                "basename": "rack",
+                "name": "rack0",
+                "id": 0,
+                "uniq_id": 1,
+                "rank": -1,
+                "exclusive": false,
+                "unit": "",
+                "size": 1,
+                "paths": {
+                    "containment": "/tiny0/rack0"
+                }
+            }
+          },
+          {
+                "id": "100",
+                "metadata": {
+                  "type": "node",
+                  "basename": "node",
+                  "name": "node2",
+                  "id": 100,
+                  "uniq_id": 100,
+                  "rank": -1,
+                  "exclusive": false,
+                  "unit": "",
+                  "size": 1,
+                  "paths": {
+                    "containment": "/tiny0/rack0/node2"
+                  }
+                }
+              },
+              {
+                "id": "101",
+                "metadata": {
+                  "type": "node",
+                  "basename": "node",
+                  "name": "node3",
+                  "id": 101,
+                  "uniq_id": 101,
+                  "rank": -1,
+                  "exclusive": false,
+                  "unit": "",
+                  "size": 1,
+                  "paths": {
+                    "containment": "/tiny0/rack0/node3"
+                  }
+                }
+              }
+        ],
+        "edges": [
+            {
+              "source": "0",
+              "target": "1",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+            },
+            {
+                "source": "1",
+                "target": "100",
+                "metadata": {
+                    "subsystem": "containment"
+                }
+              },
+              {
+                "source": "1",
+                "target": "101",
+                "metadata": {
+                    "subsystem": "containment"  
+                }
+              }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/cmd/test/data/jobspecs/grow.yaml b/cmd/test/data/jobspecs/grow.yaml
new file mode 100644
index 0000000..7ee54b6
--- /dev/null
+++ b/cmd/test/data/jobspecs/grow.yaml
@@ -0,0 +1,21 @@
+version: 9999
+resources:
+    - type: cluster
+      count: 1
+      with:
+        - type: rack
+          count: 1
+          with:
+            - type: node
+              count: 4
+
+# a comment
+attributes:
+  system:
+    duration: 3600
+tasks:
+  - command: [ "app" ]
+    slot: default
+    count:
+      per_slot: 1
+
diff --git a/cmd/test/data/tiny.json b/cmd/test/data/tiny.json
index d138235..9666bf5 100644
--- a/cmd/test/data/tiny.json
+++ b/cmd/test/data/tiny.json
@@ -1,3490 +1,2401 @@
 {
   "graph": {
-    "nodes": [
-      {
-        "id": "0",
-        "metadata": {
-          "type": "cluster",
-          "basename": "tiny",
-          "name": "tiny0",
-          "id": 0,
-          "uniq_id": 0,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0"
-          }
-        }
-      },
-      {
-        "id": "1",
-        "metadata": {
-          "type": "rack",
-          "basename": "rack",
-          "name": "rack0",
-          "id": 0,
-          "uniq_id": 1,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0"
-          }
-        }
-      },
-      {
-        "id": "2",
-        "metadata": {
-          "type": "node",
-          "basename": "node",
-          "name": "node0",
-          "id": 0,
-          "uniq_id": 2,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0"
-          }
-        }
-      },
-      {
-        "id": "3",
-        "metadata": {
-          "type": "node",
-          "basename": "node",
-          "name": "node1",
-          "id": 1,
-          "uniq_id": 3,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node1"
-          }
-        }
-      },
-      {
-        "id": "4",
-        "metadata": {
-          "type": "socket",
-          "basename": "socket",
-          "name": "socket0",
-          "id": 0,
-          "uniq_id": 4,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0"
-          }
-        }
-      },
-      {
-        "id": "5",
-        "metadata": {
-          "type": "socket",
-          "basename": "socket",
-          "name": "socket1",
-          "id": 1,
-          "uniq_id": 5,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1"
-          }
-        }
-      },
-      {
-        "id": "6",
-        "metadata": {
-          "type": "socket",
-          "basename": "socket",
-          "name": "socket0",
-          "id": 0,
-          "uniq_id": 6,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node1/socket0"
-          }
-        }
-      },
-      {
-        "id": "7",
-        "metadata": {
-          "type": "socket",
-          "basename": "socket",
-          "name": "socket1",
-          "id": 1,
-          "uniq_id": 7,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node1/socket1"
-          }
-        }
-      },
-      {
-        "id": "8",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core0",
-          "id": 0,
-          "uniq_id": 8,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core0"
-          }
-        }
-      },
-      {
-        "id": "9",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core1",
-          "id": 1,
-          "uniq_id": 9,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core1"
-          }
-        }
-      },
-      {
-        "id": "10",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core2",
-          "id": 2,
-          "uniq_id": 10,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core2"
-          }
-        }
-      },
-      {
-        "id": "11",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core3",
-          "id": 3,
-          "uniq_id": 11,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core3"
-          }
-        }
-      },
-      {
-        "id": "12",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core4",
-          "id": 4,
-          "uniq_id": 12,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core4"
-          }
-        }
-      },
-      {
-        "id": "13",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core5",
-          "id": 5,
-          "uniq_id": 13,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core5"
-          }
-        }
-      },
-      {
-        "id": "14",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core6",
-          "id": 6,
-          "uniq_id": 14,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core6"
-          }
-        }
-      },
-      {
-        "id": "15",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core7",
-          "id": 7,
-          "uniq_id": 15,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core7"
-          }
-        }
-      },
-      {
-        "id": "16",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core8",
-          "id": 8,
-          "uniq_id": 16,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core8"
-          }
-        }
-      },
-      {
-        "id": "17",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core9",
-          "id": 9,
-          "uniq_id": 17,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core9"
-          }
-        }
-      },
-      {
-        "id": "18",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core10",
-          "id": 10,
-          "uniq_id": 18,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core10"
-          }
-        }
-      },
-      {
-        "id": "19",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core11",
-          "id": 11,
-          "uniq_id": 19,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core11"
-          }
-        }
-      },
-      {
-        "id": "20",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core12",
-          "id": 12,
-          "uniq_id": 20,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core12"
-          }
-        }
-      },
-      {
-        "id": "21",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core13",
-          "id": 13,
-          "uniq_id": 21,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core13"
-          }
-        }
-      },
-      {
-        "id": "22",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core14",
-          "id": 14,
-          "uniq_id": 22,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core14"
-          }
-        }
-      },
-      {
-        "id": "23",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core15",
-          "id": 15,
-          "uniq_id": 23,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core15"
-          }
-        }
-      },
-      {
-        "id": "24",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core16",
-          "id": 16,
-          "uniq_id": 24,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core16"
-          }
-        }
-      },
-      {
-        "id": "25",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core17",
-          "id": 17,
-          "uniq_id": 25,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket0/core17"
-          }
-        }
-      },
-      {
-        "id": "26",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core18",
-          "id": 18,
-          "uniq_id": 26,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core18"
-          }
-        }
-      },
-      {
-        "id": "27",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core19",
-          "id": 19,
-          "uniq_id": 27,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core19"
-          }
-        }
-      },
-      {
-        "id": "28",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core20",
-          "id": 20,
-          "uniq_id": 28,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core20"
-          }
-        }
-      },
-      {
-        "id": "29",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core21",
-          "id": 21,
-          "uniq_id": 29,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core21"
-          }
-        }
-      },
-      {
-        "id": "30",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core22",
-          "id": 22,
-          "uniq_id": 30,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core22"
-          }
-        }
-      },
-      {
-        "id": "31",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core23",
-          "id": 23,
-          "uniq_id": 31,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core23"
-          }
-        }
-      },
-      {
-        "id": "32",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core24",
-          "id": 24,
-          "uniq_id": 32,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core24"
-          }
-        }
-      },
-      {
-        "id": "33",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core25",
-          "id": 25,
-          "uniq_id": 33,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core25"
-          }
-        }
-      },
-      {
-        "id": "34",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core26",
-          "id": 26,
-          "uniq_id": 34,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core26"
-          }
-        }
-      },
-      {
-        "id": "35",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core27",
-          "id": 27,
-          "uniq_id": 35,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core27"
-          }
-        }
-      },
-      {
-        "id": "36",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core28",
-          "id": 28,
-          "uniq_id": 36,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core28"
-          }
-        }
-      },
-      {
-        "id": "37",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core29",
-          "id": 29,
-          "uniq_id": 37,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
-          "paths": {
-            "containment": "/tiny0/rack0/node0/socket1/core29"
-          }
-        }
-      },
-      {
-        "id": "38",
-        "metadata": {
-          "type": "core",
-          "basename": "core",
-          "name": "core30",
-          "id": 30,
-          "uniq_id": 38,
-          "rank": -1,
-          "exclusive": false,
-          "unit": "",
-          "size": 1,
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+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "4",
+              "target": "80",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "4",
+              "target": "84",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "4",
+              "target": "85",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "4",
+              "target": "86",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "4",
+              "target": "87",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "26",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "27",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "28",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "29",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "30",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "31",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "32",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "33",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "34",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "35",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "36",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "37",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "38",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "39",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "40",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "41",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "42",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "43",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "81",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "88",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "89",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "90",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "5",
+              "target": "91",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "44",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "45",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "46",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "47",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "48",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "49",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "50",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "51",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "52",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "53",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "54",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "55",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "56",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "57",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "58",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "59",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "60",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "61",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "82",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "92",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "93",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "94",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "6",
+              "target": "95",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "62",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "63",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "64",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "65",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "66",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "67",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "68",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "69",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "70",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "71",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "72",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "73",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "74",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "75",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "76",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "77",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "78",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "79",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "83",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "96",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "97",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "98",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          },
+          {
+              "source": "7",
+              "target": "99",
+              "metadata": {
+                  "subsystem": "containment"
+              }
+          }
+      ]
   }
-}
+}
\ No newline at end of file
diff --git a/cmd/test/test.go b/cmd/test/test.go
index ca734a4..da7fb71 100644
--- a/cmd/test/test.go
+++ b/cmd/test/test.go
@@ -13,112 +13,166 @@ package main
 import (
 	"flag"
 	"fmt"
+	"log"
 	"os"
+	"path/filepath"
 
 	"github.com/flux-framework/fluxion-go/pkg/fluxcli"
 	"github.com/flux-framework/fluxion-go/pkg/types"
 )
 
+// readFile, panic and fail on error
+func readFile(filename string) string {
+	content, err := os.ReadFile(filename)
+	if err != nil {
+		log.Fatal("Error reading JGF file")
+	}
+	return string(content)
+}
+
+// checkErrors looks to see if the error is not an empty
+// string. If not, we print it
+func checkErrors(cli *fluxcli.ReapiClient) {
+	msg := cli.GetErrMsg()
+	if msg != "" {
+		fmt.Printf("Errors so far: %s\n", msg)
+	}
+}
+
 func main() {
 	jgfPtr := flag.String("jgf", "", "path to jgf")
-	jobspecPtr := flag.String("jobspec", "", "path to jobspec")
-	reserve := false
+	jgfGrowPtr := flag.String("grow", "", "path to grow jgf")
+	jobspecPtr := flag.String("jobspec", "", "path to jobspecs")
 	flag.Parse()
 
-	jgf, err := os.ReadFile(*jgfPtr)
-	if err != nil {
-		fmt.Println("Error reading JGF file")
-		return
-	}
+	// JobSpecs for testing:
+	// 1. Vanilla "hello world" from node down to core
+	jobspec := readFile(filepath.Join(*jobspecPtr, "test001.yaml"))
+
+	// 4 nodes, will work after grow but not before it
+	growJobspec := readFile(filepath.Join(*jobspecPtr, "grow.yaml"))
+
+	jgf := readFile(*jgfPtr)
+	growJgf := readFile(*jgfGrowPtr)
+
+	// Client creation
 	cli := fluxcli.NewReapiClient()
-	err = cli.InitContext(string(jgf), "{}")
+	err := cli.InitContext(jgf, "{}")
 	if err != nil {
-		fmt.Printf("Error initializing jobspec context for ReapiClient: %v\n", err)
-		return
+		log.Fatalf("Error initializing jobspec context for ReapiClient: %v\n", err)
 	}
-	fmt.Printf("Errors so far: %s\n", cli.GetErrMsg())
+	checkErrors(cli)
 
-	jobspec, err := os.ReadFile(*jobspecPtr)
-	if err != nil {
-		fmt.Printf("Error reading jobspec file: %v\n", err)
-		return
-	}
-	fmt.Printf("Jobspec:\n %s\n", jobspec)
+	fmt.Printf("     Jobspec:\n %s\n", jobspec)
+	fmt.Printf("Grow Jobspec:\n %s\n", growJobspec)
 
-	reserved, allocated, at, overhead, jobid, err := cli.MatchAllocate(reserve, string(jobspec))
+	// Match Allocate without and with reservation
+	reserve := false
+	reserved, allocated, at, overhead, jobid, err := cli.MatchAllocate(reserve, jobspec)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient MatchAllocate: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient MatchAllocate: %v\n", err)
 	}
 	printOutput(reserved, allocated, at, jobid, err)
 
 	reserve = true
-	reserved, allocated, at, overhead, jobid, err = cli.MatchAllocate(reserve, string(jobspec))
-	fmt.Println("Errors so far: \n", cli.GetErrMsg())
-
+	reserved, allocated, at, overhead, jobid, err = cli.MatchAllocate(reserve, jobspec)
+	checkErrors(cli)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient MatchAllocate: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient MatchAllocate: %v\n", err)
 	}
 	printOutput(reserved, allocated, at, jobid, err)
 
-	reserved, allocated, at, overhead, jobid, err = cli.Match(types.MatchAllocate, string(jobspec))
-	fmt.Println("Errors so far: \n", cli.GetErrMsg())
-
+	// Match derivatives
+	reserved, allocated, at, overhead, jobid, err = cli.Match(types.MatchAllocate, jobspec)
+	checkErrors(cli)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient MatchAllocate: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient MatchAllocate: %v\n", err)
 	}
 	printOutput(reserved, allocated, at, jobid, err)
 
-	reserved, allocated, at, overhead, jobid, err = cli.Match(types.MatchAllocateOrElseReserve, string(jobspec))
-	fmt.Println("Errors so far: \n", cli.GetErrMsg())
-
+	// ...or else Reserve
+	reserved, allocated, at, overhead, jobid, err = cli.Match(types.MatchAllocateOrElseReserve, jobspec)
+	checkErrors(cli)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient MatchAllocate: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient MatchAllocate: %v\n", err)
 	}
 	printOutput(reserved, allocated, at, jobid, err)
 
-	reserved, allocated, at, overhead, jobid, err = cli.Match(types.MatchAllocateWithSatisfiability, string(jobspec))
-	fmt.Println("Errors so far: \n", cli.GetErrMsg())
-
+	// ...with Satisfy
+	reserved, allocated, at, overhead, jobid, err = cli.Match(types.MatchAllocateWithSatisfiability, jobspec)
+	checkErrors(cli)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient MatchAllocate: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient MatchAllocate: %v\n", err)
 	}
 	printOutput(reserved, allocated, at, jobid, err)
 
-	sat, overhead, err := cli.MatchSatisfy(string(jobspec))
-	fmt.Println("Errors so far: \n", cli.GetErrMsg())
-
+	// Match Satisfy
+	sat, overhead, err := cli.MatchSatisfy(jobspec)
+	checkErrors(cli)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient MatchAllocate: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient MatchSatisfy: %v\n", err)
 	}
 	printSatOutput(sat, err)
 
+	// Cancel
 	err = cli.Cancel(1, false)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient Cancel: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient Cancel: %v\n", err)
 	}
 	fmt.Printf("Cancel output: %v\n", err)
 
+	// Info
 	reserved, at, overhead, mode, err := cli.Info(1)
 	if err != nil {
-		fmt.Printf("Error in ReapiClient Info: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient Info: %v\n", err)
 	}
 	fmt.Printf("Info output jobid 1: %t, %d, %f, %s, %v\n", reserved, at, overhead, mode, err)
 
 	reserved, at, overhead, mode, err = cli.Info(2)
 	if err != nil {
-		fmt.Println("Error in ReapiClient Info: %v\n", err)
-		return
+		log.Fatalf("Error in ReapiClient Info: %v\n", err)
 	}
 	fmt.Printf("Info output jobid 2: %t, %d, %f, %v\n", reserved, at, overhead, err)
 
+	// Test grow - we first will ask "tiny" for resources it doesn't have (4 nodes)
+	// then we will grow, and the request should succeed.
+	fmt.Println("Asking to MatchSatisfy 4 nodes (not possible)")
+	sat, overhead, err = cli.MatchSatisfy(growJobspec)
+	checkErrors(cli)
+	if err != nil {
+		log.Fatalf("Error in ReapiClient MatchSatisfy: %v\n", err)
+	}
+	printSatOutput(sat, err)
+
+	// This should not be satisfied!
+	if sat {
+		log.Fatalf("Error in ReapiClient MatchSatisfy - asking for 4 nodes with only 2 should fail: %v\n", err)
+	}
+
+	// Add nodes: note the data file comes originally from:
+	// https://github.com/milroy/flux-sched/tree/grow-api/t/data/resource/jgfs/elastic
+	fmt.Println("🍔 Asking to Grow from 2 to 4 Nodes")
+	err = cli.Grow(growJgf)
+	if err != nil {
+		log.Fatalf("Error in ReapiClient Grow: %s %s\n", err, cli.GetErrMsg())
+	}
+	fmt.Printf("Grow request return value: %v\n", err)
+
+	// Ask again - it should succeed this time.
+	fmt.Println("Asking to MatchSatisfy 4 nodes (now IS possible)")
+	sat, overhead, err = cli.MatchSatisfy(growJobspec)
+	checkErrors(cli)
+
+	if err != nil {
+		log.Fatalf("Error in ReapiClient MatchSatisfy: %v\n", err)
+	}
+	printSatOutput(sat, err)
+
+	// This should not be satisfied!
+	if !sat {
+		log.Fatalf("Error in ReapiClient MatchSatisfy - asking for 4 nodes should now succeed: %v\n", err)
+	}
+
 }
 
 func printOutput(reserved bool, allocated string, at int64, jobid uint64, err error) {
diff --git a/pkg/fluxcli/reapi_cli.go b/pkg/fluxcli/reapi_cli.go
index 187734e..2360cea 100644
--- a/pkg/fluxcli/reapi_cli.go
+++ b/pkg/fluxcli/reapi_cli.go
@@ -220,6 +220,23 @@ func (cli *ReapiClient) UpdateAllocate(jobid int, r string) (at int64, overhead
 	return at, overhead, r_out, err
 }
 
+// Update the resource state with R.
+//
+//	\param h   Opaque handle. How it is used is an implementation
+//		       detail. However, when it is used within a Flux's
+//	           service module, it is expected to be a pointer
+//			           to a flux_t object.
+//	\param R_subgraph R String
+//	\return          0 on success; -1 on error.
+//	int reapi_cli_grow (reapi_cli_ctx_t *ctx, const char *R_subgraph);
+func (cli *ReapiClient) Grow(rSubgraph string) (err error) {
+	var resources = C.CString(rSubgraph)
+	defer C.free(unsafe.Pointer(resources))
+
+	fluxerr := (int)(C.reapi_cli_grow((*C.struct_reapi_cli_ctx)(cli.ctx), resources))
+	return retvalToError(fluxerr, "issue resource api client grow")
+}
+
 // Cancel cancels the allocation or reservation corresponding to jobid.
 //
 //	\param jobid     jobid of the uint64_t type.