diff --git a/src/App.tsx b/src/App.tsx
index 34aa0450..830267df 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -5,24 +5,34 @@ import { getJobStatus, addRecipe } from "./utils/firebase";
 import { getFirebaseRecipe, jsonToString } from "./utils/recipeLoader";
 import { getSubmitPackingUrl, JOB_STATUS } from "./constants/aws";
 import { FIRESTORE_FIELDS } from "./constants/firebase";
-import { SIMULARIUM_EMBED_URL } from "./constants/urls";
-import { useResultUrl, useSetResultUrl } from "./state/store";
+import {
+    useJobId,
+    useJobLogs,
+    useOutputsDirectory,
+    useRunTime,
+    useSetJobId,
+    useSetJobLogs,
+    useSetPackingResults,
+} from "./state/store";
 import PackingInput from "./components/PackingInput";
 import Viewer from "./components/Viewer";
 import StatusBar from "./components/StatusBar";
+import { EMPTY_PACKING_RESULTS } from "./state/constants";
+
 import "./App.css";
 
 const { Header, Content, Sider, Footer } = Layout;
 const { Link } = Typography;
 
 function App() {
-    const [jobId, setJobId] = useState("");
-    const [jobStatus, setJobStatus] = useState("");
-    const [jobLogs, setJobLogs] = useState<string>("");
-    const [outputDir, setOutputDir] = useState<string>("");
-    const [runTime, setRunTime] = useState<number>(0);
-    const resultUrl = useResultUrl();
-    const setResultUrl = useSetResultUrl();
+    const [jobStatus, setJobStatus] = useState<string>("");
+    const setJobLogs = useSetJobLogs();
+    const jobLogs = useJobLogs();
+    const setJobId = useSetJobId();
+    const jobId = useJobId();
+    const setPackingResults = useSetPackingResults();
+    const runTime = useRunTime();
+    const outputDir = useOutputsDirectory();
 
     let start = 0;
 
@@ -31,11 +41,7 @@ function App() {
     }
 
     const resetState = () => {
-        setJobId("");
-        setJobStatus("");
-        setJobLogs("");
-        setResultUrl("");
-        setRunTime(0);
+        setPackingResults({ ...EMPTY_PACKING_RESULTS });
     };
 
     const recipeHasChanged = async (
@@ -136,12 +142,22 @@ function App() {
             }
         }
         const range = (Date.now() - start) / 1000;
-        setRunTime(range);
         if (localJobStatus.status == JOB_STATUS.DONE) {
-            setResultUrl(localJobStatus.result_path);
-            setOutputDir(localJobStatus.outputs_directory);
+            setPackingResults({
+                jobId: id,
+                jobLogs: "",
+                resultUrl: localJobStatus.result_path,
+                runTime: range,
+                outputDir: localJobStatus.outputs_directory,
+            });
         } else if (localJobStatus.status == JOB_STATUS.FAILED) {
-            setJobLogs(localJobStatus.error_message);
+            setPackingResults({
+                jobId: id,
+                jobLogs: `Packing job failed: ${localJobStatus.error_message}`,
+                resultUrl: "",
+                runTime: range,
+                outputDir: "",
+            });
         }
     };
 
@@ -164,7 +180,7 @@ function App() {
                     <PackingInput startPacking={startPacking} />
                 </Sider>
                 <Content className="content-container">
-                    <Viewer resultUrl={resultUrl ? SIMULARIUM_EMBED_URL + resultUrl : ""} />
+                    <Viewer />
                 </Content>
             </Layout>
             <Footer className="footer">
diff --git a/src/components/Dropdown/index.tsx b/src/components/Dropdown/index.tsx
index 98e90612..055fd959 100644
--- a/src/components/Dropdown/index.tsx
+++ b/src/components/Dropdown/index.tsx
@@ -1,11 +1,11 @@
 import { Select } from "antd";
 import { map } from "lodash-es";
-import { Dictionary, PackingInputs } from "../../types";
+import { Dictionary, RecipeManifest } from "../../types";
 
 interface DropdownProps {
     placeholder: string;
     defaultValue?: string;
-    options: Dictionary<PackingInputs>;
+    options: Dictionary<RecipeManifest>;
     onChange: (value: string) => void;
 }
 
diff --git a/src/components/Viewer/index.tsx b/src/components/Viewer/index.tsx
index b4718323..8a2dc79d 100644
--- a/src/components/Viewer/index.tsx
+++ b/src/components/Viewer/index.tsx
@@ -1,16 +1,17 @@
+import { SIMULARIUM_EMBED_URL } from "../../constants/urls";
+import { useResultUrl } from "../../state/store";
 import "./style.css";
 
-interface ViewerProps {
-    resultUrl: string;
-}
-
-const Viewer = (props: ViewerProps): JSX.Element => {
-    const { resultUrl } = props;
+const Viewer = (): JSX.Element => {
+    const resultUrl = useResultUrl();
     return (
         <div className="viewer-container">
-            <iframe className="simularium-embed" src={resultUrl} />
+            <iframe
+                className="simularium-embed"
+                src={`${SIMULARIUM_EMBED_URL}${resultUrl}`}
+            />
         </div>
     );
 };
 
-export default Viewer;
\ No newline at end of file
+export default Viewer;
diff --git a/src/state/constants.ts b/src/state/constants.ts
new file mode 100644
index 00000000..c1a9418c
--- /dev/null
+++ b/src/state/constants.ts
@@ -0,0 +1,11 @@
+import { EditableField, PackingResults } from "../types";
+
+// stable/frozen empty array to prevent re-renders
+export const EMPTY_FIELDS: readonly EditableField[] = Object.freeze([]);
+export const EMPTY_PACKING_RESULTS: PackingResults = Object.freeze({
+    jobId: "",
+    jobLogs: "",
+    resultUrl: "",
+    runTime: 0,
+    outputDir: "",
+});
diff --git a/src/state/store.ts b/src/state/store.ts
index 2a9a5f66..47123dff 100644
--- a/src/state/store.ts
+++ b/src/state/store.ts
@@ -1,9 +1,10 @@
 import { create } from "zustand";
 import { subscribeWithSelector } from "zustand/middleware";
 import { get as lodashGet, set as lodashSet } from "lodash-es";
-import { PackingInputs } from "../types";
+import { PackingResults, RecipeManifest } from "../types";
 import { getFirebaseRecipe, jsonToString } from "../utils/recipeLoader";
 import { getPackingInputsDict } from "../utils/firebase";
+import { EMPTY_PACKING_RESULTS } from "./constants";
 
 export interface RecipeData {
     id: string;
@@ -14,8 +15,9 @@ export interface RecipeData {
 
 export interface RecipeState {
     selectedRecipeId: string;
-    inputOptions: Record<string, PackingInputs>;
+    inputOptions: Record<string, RecipeManifest>;
     recipes: Record<string, RecipeData>;
+    packingResults: PackingResults;
 }
 
 export interface UIState {
@@ -43,7 +45,9 @@ type Actions = {
             recipeString: string
         ) => Promise<void>
     ) => Promise<void>;
-    setResultUrl: (url: string) => void;
+    setPackingResults: (results: PackingResults) => void;
+    setJobLogs: (logs: string) => void;
+    setJobId: (jobId: string) => void;
 };
 
 export type RecipeStore = RecipeState & UIState & Actions;
@@ -56,6 +60,7 @@ const initialState: RecipeState & UIState = {
     recipes: {},
     isLoading: false,
     isPacking: false,
+    packingResults: { ...EMPTY_PACKING_RESULTS },
 };
 
 export const useRecipeStore = create<RecipeStore>()(
@@ -115,6 +120,8 @@ export const useRecipeStore = create<RecipeStore>()(
         },
 
         selectRecipe: async (recipeId) => {
+            get().setPackingResults({ ...EMPTY_PACKING_RESULTS });
+
             const sel = get().inputOptions[recipeId];
             if (!sel) return;
 
@@ -127,22 +134,27 @@ export const useRecipeStore = create<RecipeStore>()(
             }
         },
 
+        setPackingResults: (results: PackingResults) => {
+            set({ packingResults: results });
+        },
 
-        setResultUrl: (url: string) => {
-            const { inputOptions, selectedRecipeId } = get();
-            const sel = inputOptions[selectedRecipeId];
-            if (!sel) return;
+        setJobLogs: (logs: string) => {
             set({
-                inputOptions: {
-                    ...get().inputOptions,
-                    [selectedRecipeId]: {
-                        ...sel,
-                        result_path: url,
-                    },
+                packingResults: {
+                    ...get().packingResults,
+                    jobLogs: logs,
                 },
             });
         },
 
+        setJobId: (jobId: string) => {
+            set({
+                packingResults: {
+                    ...get().packingResults,
+                    jobId: jobId,
+                },
+            });
+        },
 
         updateRecipeString: (recipeId, newString) => {
             set((s) => {
@@ -234,12 +246,13 @@ export const useRecipeStore = create<RecipeStore>()(
     }))
 );
 
-// tiny helpers/selectors (all derived — not stored)
+// simple selectors
 export const useSelectedRecipeId = () =>
     useRecipeStore((s) => s.selectedRecipeId);
 export const useCurrentRecipeString = () =>
     useRecipeStore((s) => s.recipes[s.selectedRecipeId]?.currentString ?? "");
 export const useInputOptions = () => useRecipeStore((s) => s.inputOptions);
+
 export const useIsLoading = () => useRecipeStore((s) => s.isLoading);
 export const useIsPacking = () => useRecipeStore((s) => s.isPacking);
 export const useFieldsToDisplay = () =>
@@ -248,8 +261,53 @@ export const useIsCurrentRecipeModified = () =>
     useRecipeStore((s) => s.recipes[s.selectedRecipeId]?.isModified ?? false);
 export const useGetOriginalValue = () =>
     useRecipeStore((s) => s.getOriginalValue);
-export const useResultUrl = () =>
-    useRecipeStore((s) => s.inputOptions[s.selectedRecipeId]?.result_path);
+const usePackingResults = () => useRecipeStore((s) => s.packingResults);
+
+// compound selectors
+
+const useCurrentRecipeManifest = () => {
+    const selectedRecipeId = useSelectedRecipeId();
+    const inputOptions = useInputOptions();
+    if (!selectedRecipeId) return undefined;
+    return inputOptions[selectedRecipeId];
+};
+const useDefaultResultPath = () => {
+    const manifest = useCurrentRecipeManifest();
+    return manifest?.defaultResultPath || "";
+};
+
+export const useRunTime = () => {
+    const results = usePackingResults();
+    return results.runTime;
+};
+
+export const useJobLogs = () => {
+    const results = usePackingResults();
+    return results.jobLogs;
+};
+
+export const useJobId = () => {
+    const results = usePackingResults();
+    return results.jobId;
+};
+
+export const useOutputsDirectory = () => {
+    const results = usePackingResults();
+    return results.outputDir;
+};
+
+export const useResultUrl = () => {
+    const results = usePackingResults();
+    const currentRecipeId = useSelectedRecipeId();
+    const defaultResultPath = useDefaultResultPath();
+    let path = "";
+    if (results.resultUrl) {
+        path = results.resultUrl;
+    } else if (currentRecipeId) {
+        path = defaultResultPath;
+    }
+    return path;
+};
 
 // action selectors (stable identities)
 export const useLoadInputOptions = () =>
@@ -265,4 +323,7 @@ export const useRestoreRecipeDefault = () =>
 export const useStartPacking = () => useRecipeStore((s) => s.startPacking);
 export const useGetCurrentValue = () =>
     useRecipeStore((s) => s.getCurrentValue);
-export const useSetResultUrl = () => useRecipeStore((s) => s.setResultUrl);
+export const useSetPackingResults = () =>
+    useRecipeStore((s) => s.setPackingResults);
+export const useSetJobLogs = () => useRecipeStore((s) => s.setJobLogs);
+export const useSetJobId = () => useRecipeStore((s) => s.setJobId);
diff --git a/src/types/index.ts b/src/types/index.ts
index 7a2848b0..3782d021 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -16,11 +16,11 @@ export interface Dictionary<T> {
     [Key: string]: T;
 }
 
-export type PackingInputs = {
+export type RecipeManifest = {
     name?: string;
     config: string;
     recipe: string;
-    result_path?: string;
+    defaultResultPath?: string;
     editable_fields?: EditableField[];
 };
 
@@ -31,6 +31,14 @@ export type JobStatusObject = {
     result_path: string;
 };
 
+export type PackingResults = {
+    jobId: string;
+    jobLogs: string;
+    resultUrl: string;
+    runTime: number;
+    outputDir: string;
+};
+
 export type EditableField = {
     id: string;
     name: string;
diff --git a/src/utils/firebase.ts b/src/utils/firebase.ts
index ec435ac8..04c5a879 100644
--- a/src/utils/firebase.ts
+++ b/src/utils/firebase.ts
@@ -21,7 +21,7 @@ import {
 } from "../constants/firebase";
 import {
     FirestoreDoc,
-    PackingInputs,
+    RecipeManifest,
     Dictionary,
     EditableField,
     JobStatusObject,
@@ -163,11 +163,11 @@ const getEditableFieldsList = async (
     return docs;
 };
 
-const getPackingInputsDict = async (): Promise<Dictionary<PackingInputs>> => {
+const getPackingInputsDict = async (): Promise<Dictionary<RecipeManifest>> => {
     const docs = await getAllDocsFromCollection(
         FIRESTORE_COLLECTIONS.PACKING_INPUTS
     );
-    const inputsDict: Dictionary<PackingInputs> = {};
+    const inputsDict: Dictionary<RecipeManifest> = {};
     for (const doc of docs) {
         const displayName = doc[FIRESTORE_FIELDS.NAME];
         const config = doc[FIRESTORE_FIELDS.CONFIG];
@@ -182,7 +182,7 @@ const getPackingInputsDict = async (): Promise<Dictionary<PackingInputs>> => {
                 [FIRESTORE_FIELDS.CONFIG]: config,
                 [FIRESTORE_FIELDS.RECIPE]: recipe,
                 [FIRESTORE_FIELDS.EDITABLE_FIELDS]: editableFields,
-                [FIRESTORE_FIELDS.RESULT_PATH]: result,
+                defaultResultPath: result,
             };
         }
     }