diff --git a/packages/SwingSet/src/kernel/initializeKernel.js b/packages/SwingSet/src/kernel/initializeKernel.js
index 45df8946444..19f7bae91ae 100644
--- a/packages/SwingSet/src/kernel/initializeKernel.js
+++ b/packages/SwingSet/src/kernel/initializeKernel.js
@@ -65,6 +65,7 @@ export function initializeKernel(config, hostStorage, verbose = false) {
         'managerType',
         'enableDisavow',
         'enableSetup',
+        'enableVatstore',
         'virtualObjectCacheSize',
         'useTranscript',
       ]);
diff --git a/packages/SwingSet/src/kernel/liveSlots.js b/packages/SwingSet/src/kernel/liveSlots.js
index 152ce4dfb94..be6fb206ab3 100644
--- a/packages/SwingSet/src/kernel/liveSlots.js
+++ b/packages/SwingSet/src/kernel/liveSlots.js
@@ -23,6 +23,7 @@ const DEFAULT_VIRTUAL_OBJECT_CACHE_SIZE = 3; // XXX ridiculously small value to
  * @param {*} forVatID  Vat ID label, for use in debug diagostics
  * @param {number} cacheSize  Maximum number of entries in the virtual object state cache
  * @param {boolean} enableDisavow
+ * @param {boolean} enableVatstore
  * @param {*} vatPowers
  * @param {*} vatParameters
  * @param {*} gcTools { WeakRef, FinalizationRegistry, waitUntilQuiescent, gcAndFinalize }
@@ -40,6 +41,7 @@ function build(
   forVatID,
   cacheSize,
   enableDisavow,
+  enableVatstore,
   vatPowers,
   vatParameters,
   gcTools,
@@ -916,6 +918,23 @@ function build(
     if (enableDisavow) {
       vpow.disavow = disavow;
     }
+    if (enableVatstore) {
+      vpow.vatstore = harden({
+        get: key => {
+          assert.typeof(key, 'string');
+          return syscall.vatstoreGet(`vvs.${key}`);
+        },
+        set: (key, value) => {
+          assert.typeof(key, 'string');
+          assert.typeof(value, 'string');
+          syscall.vatstoreSet(`vvs.${key}`, value);
+        },
+        delete: key => {
+          assert.typeof(key, 'string');
+          syscall.vatstoreDelete(`vvs.${key}`);
+        },
+      });
+    }
 
     // here we finally invoke the vat code, and get back the root object
     const rootObject = buildRootObject(harden(vpow), harden(vatParameters));
@@ -1029,6 +1048,7 @@ function build(
  * @param {*} vatParameters
  * @param {number} cacheSize  Upper bound on virtual object cache size
  * @param {boolean} enableDisavow
+ * @param {boolean} enableVatstore
  * @param {*} gcTools { WeakRef, FinalizationRegistry, waitUntilQuiescent }
  * @param {Console} [liveSlotsConsole]
  * @returns {*} { vatGlobals, inescapableGlobalProperties, dispatch, setBuildRootObject }
@@ -1062,6 +1082,7 @@ export function makeLiveSlots(
   vatParameters = harden({}),
   cacheSize = DEFAULT_VIRTUAL_OBJECT_CACHE_SIZE,
   enableDisavow = false,
+  enableVatstore = false,
   gcTools,
   liveSlotsConsole = console,
 ) {
@@ -1074,6 +1095,7 @@ export function makeLiveSlots(
     forVatID,
     cacheSize,
     enableDisavow,
+    enableVatstore,
     allVatPowers,
     vatParameters,
     gcTools,
@@ -1102,6 +1124,7 @@ export function makeMarshaller(syscall, gcTools) {
     'forVatID',
     DEFAULT_VIRTUAL_OBJECT_CACHE_SIZE,
     false,
+    false,
     {},
     {},
     gcTools,
diff --git a/packages/SwingSet/src/kernel/loadVat.js b/packages/SwingSet/src/kernel/loadVat.js
index 42756446c4d..014d568e7fd 100644
--- a/packages/SwingSet/src/kernel/loadVat.js
+++ b/packages/SwingSet/src/kernel/loadVat.js
@@ -84,6 +84,7 @@ export function makeVatLoader(stuff) {
     'vatParameters',
     'enableSetup',
     'enablePipelining',
+    'enableVatstore',
     'virtualObjectCacheSize',
     'useTranscript',
   ];
@@ -96,6 +97,7 @@ export function makeVatLoader(stuff) {
     'enableDisavow',
     'enableSetup',
     'enablePipelining',
+    'enableVatstore',
     'virtualObjectCacheSize',
     'useTranscript',
   ];
@@ -141,6 +143,10 @@ export function makeVatLoader(stuff) {
    *        without waiting for the promises to be resolved.  If false, such
    *        messages will be queued inside the kernel.  Defaults to false.
    *
+   *    'enableVatstore' If true, the vat is provided with an object that allows
+   *        individual keyed access (in an insolated subset of the key space) to
+   *        the vatstore.  Defaults to false.
+   *
    *    'useTranscript' If true, saves a transcript of a vat's inbound
    *        deliveries and outbound syscalls so that the vat's internal state
    *        can be reconstructed via replay.  If false, no such record is kept.
@@ -175,6 +181,7 @@ export function makeVatLoader(stuff) {
       enableSetup = false,
       enableDisavow = false,
       enablePipelining = false,
+      enableVatstore = false,
       virtualObjectCacheSize,
       useTranscript = true,
       name,
@@ -206,6 +213,7 @@ export function makeVatLoader(stuff) {
       vatConsole: makeVatConsole('vat', vatID),
       liveSlotsConsole: makeVatConsole('ls', vatID),
       vatParameters,
+      enableVatstore,
       virtualObjectCacheSize,
       useTranscript,
       name,
diff --git a/packages/SwingSet/src/kernel/vatManager/factory.js b/packages/SwingSet/src/kernel/vatManager/factory.js
index 98f29bf1ce7..2ace13ee8ff 100644
--- a/packages/SwingSet/src/kernel/vatManager/factory.js
+++ b/packages/SwingSet/src/kernel/vatManager/factory.js
@@ -60,6 +60,7 @@ export function makeVatManagerFactory({
       'enableDisavow',
       'enableSetup',
       'liveSlotsConsole',
+      'enableVatstore',
       'virtualObjectCacheSize',
       'useTranscript',
       'vatParameters',
diff --git a/packages/SwingSet/src/kernel/vatManager/manager-local.js b/packages/SwingSet/src/kernel/vatManager/manager-local.js
index 2c27077d8ef..b7741dc2a87 100644
--- a/packages/SwingSet/src/kernel/vatManager/manager-local.js
+++ b/packages/SwingSet/src/kernel/vatManager/manager-local.js
@@ -97,6 +97,7 @@ export function makeLocalVatManagerFactory(tools) {
       vatParameters = {},
       vatConsole,
       liveSlotsConsole,
+      enableVatstore = false,
       virtualObjectCacheSize,
       compareSyscalls,
       useTranscript,
@@ -139,6 +140,7 @@ export function makeLocalVatManagerFactory(tools) {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
       gcTools,
       liveSlotsConsole,
     );
diff --git a/packages/SwingSet/src/kernel/vatManager/manager-nodeworker.js b/packages/SwingSet/src/kernel/vatManager/manager-nodeworker.js
index 303078e883c..265d33016ae 100644
--- a/packages/SwingSet/src/kernel/vatManager/manager-nodeworker.js
+++ b/packages/SwingSet/src/kernel/vatManager/manager-nodeworker.js
@@ -40,6 +40,7 @@ export function makeNodeWorkerVatManagerFactory(tools) {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
       compareSyscalls,
       useTranscript,
     } = managerOptions;
@@ -114,6 +115,7 @@ export function makeNodeWorkerVatManagerFactory(tools) {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
     ]);
 
     function deliverToWorker(delivery) {
diff --git a/packages/SwingSet/src/kernel/vatManager/manager-subprocess-node.js b/packages/SwingSet/src/kernel/vatManager/manager-subprocess-node.js
index 686e100811a..63d2d198f00 100644
--- a/packages/SwingSet/src/kernel/vatManager/manager-subprocess-node.js
+++ b/packages/SwingSet/src/kernel/vatManager/manager-subprocess-node.js
@@ -20,6 +20,7 @@ export function makeNodeSubprocessFactory(tools) {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
       compareSyscalls,
       useTranscript,
     } = managerOptions;
@@ -109,6 +110,7 @@ export function makeNodeSubprocessFactory(tools) {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
     ]);
 
     function shutdown() {
diff --git a/packages/SwingSet/src/kernel/vatManager/manager-subprocess-xsnap.js b/packages/SwingSet/src/kernel/vatManager/manager-subprocess-xsnap.js
index 4142eb62cd1..4b7bd55c05c 100644
--- a/packages/SwingSet/src/kernel/vatManager/manager-subprocess-xsnap.js
+++ b/packages/SwingSet/src/kernel/vatManager/manager-subprocess-xsnap.js
@@ -52,6 +52,7 @@ export function makeXsSubprocessFactory({
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
       name,
       metered,
       compareSyscalls,
@@ -126,6 +127,7 @@ export function makeXsSubprocessFactory({
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
     ]);
     if (bundleReply[0] === 'dispatchReady') {
       parentLog(vatID, `bundle loaded. dispatch ready.`);
diff --git a/packages/SwingSet/src/kernel/vatManager/supervisor-nodeworker.js b/packages/SwingSet/src/kernel/vatManager/supervisor-nodeworker.js
index 0efc4e3bae9..3d8a3ccca00 100644
--- a/packages/SwingSet/src/kernel/vatManager/supervisor-nodeworker.js
+++ b/packages/SwingSet/src/kernel/vatManager/supervisor-nodeworker.js
@@ -57,6 +57,7 @@ parentPort.on('message', ([type, ...margs]) => {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
     ] = margs;
 
     function testLog(...args) {
@@ -89,6 +90,7 @@ parentPort.on('message', ([type, ...margs]) => {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
       gcTools,
     );
 
diff --git a/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-node.js b/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-node.js
index cc05db96e18..2cda6d911d1 100644
--- a/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-node.js
+++ b/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-node.js
@@ -72,6 +72,7 @@ fromParent.on('data', ([type, ...margs]) => {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
     ] = margs;
 
     function testLog(...args) {
@@ -102,6 +103,7 @@ fromParent.on('data', ([type, ...margs]) => {
       vatParameters,
       virtualObjectCacheSize,
       enableDisavow,
+      enableVatstore,
       gcTools,
     );
 
diff --git a/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-xsnap.js b/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-xsnap.js
index 23db6a85305..fd8fa5c5086 100644
--- a/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-xsnap.js
+++ b/packages/SwingSet/src/kernel/vatManager/supervisor-subprocess-xsnap.js
@@ -143,6 +143,7 @@ function makeWorker(port) {
    * @param {unknown} vatParameters
    * @param {unknown} virtualObjectCacheSize
    * @param {boolean} enableDisavow
+   * @param {boolean} enableVatstore
    * @returns { Promise<Tagged> }
    */
   async function setBundle(
@@ -151,6 +152,7 @@ function makeWorker(port) {
     vatParameters,
     virtualObjectCacheSize,
     enableDisavow,
+    enableVatstore,
   ) {
     /** @type { (vso: VatSyscallObject) => VatSyscallResult } */
     function syscallToManager(vatSyscallObject) {
@@ -195,6 +197,7 @@ function makeWorker(port) {
       vatParameters,
       cacheSize,
       enableDisavow,
+      enableVatstore,
       gcTools,
     );
 
@@ -227,7 +230,15 @@ function makeWorker(port) {
       case 'setBundle': {
         assert(!dispatch, 'cannot setBundle again');
         const enableDisavow = !!args[4];
-        return setBundle(args[0], args[1], args[2], args[3], enableDisavow);
+        const enableVatstore = !!args[5];
+        return setBundle(
+          args[0],
+          args[1],
+          args[2],
+          args[3],
+          enableDisavow,
+          enableVatstore,
+        );
       }
       case 'deliver': {
         assert(dispatch, 'cannot deliver before setBundle');
diff --git a/packages/SwingSet/src/kernel/virtualObjectManager.js b/packages/SwingSet/src/kernel/virtualObjectManager.js
index ceee417149e..0005835fd49 100644
--- a/packages/SwingSet/src/kernel/virtualObjectManager.js
+++ b/packages/SwingSet/src/kernel/virtualObjectManager.js
@@ -174,7 +174,7 @@ export function makeVirtualObjectManager(
    * @returns {*} an object representing the object's stored state.
    */
   function fetch(vobjID) {
-    return JSON.parse(syscall.vatstoreGet(vobjID));
+    return JSON.parse(syscall.vatstoreGet(`vom.${vobjID}`));
   }
 
   /**
@@ -185,7 +185,7 @@ export function makeVirtualObjectManager(
    * @param {*} rawData  A data object representing the state to be written.
    */
   function store(vobjID, rawData) {
-    syscall.vatstoreSet(vobjID, JSON.stringify(rawData));
+    syscall.vatstoreSet(`vom.${vobjID}`, JSON.stringify(rawData));
   }
 
   const cache = makeCache(cacheSize, fetch, store);
@@ -308,7 +308,7 @@ export function makeVirtualObjectManager(
       if (vobjID) {
         const { type, virtual, allocatedByVat } = parseVatSlot(vobjID);
         if (type === 'object' && (virtual || !allocatedByVat)) {
-          return `ws${storeID}.${vobjID}`;
+          return `vom.ws${storeID}.${vobjID}`;
         }
       }
       return undefined;
diff --git a/packages/SwingSet/src/types.js b/packages/SwingSet/src/types.js
index 0a420986e18..53aded75c27 100644
--- a/packages/SwingSet/src/types.js
+++ b/packages/SwingSet/src/types.js
@@ -26,6 +26,7 @@
  *   metered?: boolean,
  *   enableDisavow?: boolean,
  *   useTranscript?: boolean,
+ *   enableVatstore?: boolean,
  *   vatParameters: Record<string, unknown>,
  *   virtualObjectCacheSize: number,
  *   name: string,
diff --git a/packages/SwingSet/test/liveslots-helpers.js b/packages/SwingSet/test/liveslots-helpers.js
index ed610ae325e..32897901461 100644
--- a/packages/SwingSet/test/liveslots-helpers.js
+++ b/packages/SwingSet/test/liveslots-helpers.js
@@ -54,6 +54,7 @@ export function makeDispatch(
     {},
     undefined,
     enableDisavow,
+    false,
     gcTools,
   );
   setBuildRootObject(build);
diff --git a/packages/SwingSet/test/test-liveslots.js b/packages/SwingSet/test/test-liveslots.js
index d2a835ef897..001d21d9f71 100644
--- a/packages/SwingSet/test/test-liveslots.js
+++ b/packages/SwingSet/test/test-liveslots.js
@@ -932,7 +932,16 @@ test('dropImports', async t => {
     return root;
   }
 
-  const ls = makeLiveSlots(syscall, 'vatA', {}, {}, undefined, false, gcTools);
+  const ls = makeLiveSlots(
+    syscall,
+    'vatA',
+    {},
+    {},
+    undefined,
+    false,
+    false,
+    gcTools,
+  );
   const { setBuildRootObject, dispatch, deadSet } = ls;
   setBuildRootObject(build);
   const allFRs = gcTools.getAllFRs();
diff --git a/packages/SwingSet/test/test-vatstore.js b/packages/SwingSet/test/test-vatstore.js
new file mode 100644
index 00000000000..d02461b34b3
--- /dev/null
+++ b/packages/SwingSet/test/test-vatstore.js
@@ -0,0 +1,60 @@
+/* global require */
+// eslint-disable-next-line import/order
+import { test } from '../tools/prepare-test-env-ava';
+
+import { provideHostStorage } from '../src/hostStorage';
+import { buildVatController } from '../src/index';
+import { capargs } from './util.js';
+
+test('vatstore', async t => {
+  const config = {
+    bootstrap: 'bootstrap',
+    vats: {
+      bootstrap: {
+        sourceSpec: require.resolve('./vat-vatstore.js'),
+        creationOptions: {
+          enableVatstore: true,
+        },
+      },
+    },
+  };
+  const hostStorage = provideHostStorage();
+  const c = await buildVatController(config, [], {
+    hostStorage,
+  });
+
+  function send(msg, ...args) {
+    c.queueToVatExport('bootstrap', 'o+0', msg, capargs(args));
+  }
+
+  send('get', 'zot');
+  await c.run();
+  send('store', 'zot', 'first zot');
+  send('get', 'zot');
+  send('get', 'foo');
+  send('store', 'zot', 'second zot');
+  send('store', 'foo', 'first foo');
+  send('get', 'zot');
+  send('delete', 'zot');
+  send('get', 'foo');
+  send('get', 'zot');
+  await c.run();
+
+  t.deepEqual(c.dump().log, [
+    'get zot -> <undefined>',
+    'store zot <- "first zot"',
+    'get zot -> "first zot"',
+    'get foo -> <undefined>',
+    'store zot <- "second zot"',
+    'store foo <- "first foo"',
+    'get zot -> "second zot"',
+    'delete zot',
+    'get foo -> "first foo"',
+    'get zot -> <undefined>',
+  ]);
+  for (const k of hostStorage.kvStore.getKeys('', '')) {
+    if (k.endsWith('.foo')) {
+      t.is(k, 'v1.vs.vvs.foo');
+    }
+  }
+});
diff --git a/packages/SwingSet/test/vat-vatstore.js b/packages/SwingSet/test/vat-vatstore.js
new file mode 100644
index 00000000000..801dfd25551
--- /dev/null
+++ b/packages/SwingSet/test/vat-vatstore.js
@@ -0,0 +1,26 @@
+import { Far } from '@agoric/marshal';
+
+export function buildRootObject(vatPowers) {
+  const vatstore = vatPowers.vatstore;
+  const log = vatPowers.testLog;
+
+  return Far('root', {
+    bootstrap(_vats) {},
+    get(key) {
+      const value = vatstore.get(key);
+      if (value) {
+        log(`get ${key} -> "${value}"`);
+      } else {
+        log(`get ${key} -> <undefined>`);
+      }
+    },
+    store(key, value) {
+      vatstore.set(key, value);
+      log(`store ${key} <- "${value}"`);
+    },
+    delete(key) {
+      vatstore.delete(key);
+      log(`delete ${key}`);
+    },
+  });
+}
diff --git a/packages/SwingSet/test/virtualObjects/test-representatives.js b/packages/SwingSet/test/virtualObjects/test-representatives.js
index 247de1b02a9..1fe6a2796cc 100644
--- a/packages/SwingSet/test/virtualObjects/test-representatives.js
+++ b/packages/SwingSet/test/virtualObjects/test-representatives.js
@@ -264,7 +264,7 @@ test('exercise cache', async t => {
     await doSimple('holdThing', what);
   }
   function thingID(num) {
-    return `v1.vs.o+1/${num}`;
+    return `v1.vs.vom.o+1/${num}`;
   }
   function thingVal(name) {
     return JSON.stringify({
diff --git a/packages/SwingSet/test/virtualObjects/test-virtualObjectManager.js b/packages/SwingSet/test/virtualObjects/test-virtualObjectManager.js
index 7618d9426d4..8408cf1a02a 100644
--- a/packages/SwingSet/test/virtualObjects/test-virtualObjectManager.js
+++ b/packages/SwingSet/test/virtualObjects/test-virtualObjectManager.js
@@ -105,41 +105,41 @@ test('virtual object operations', t => {
 
   const zot1 = zotMaker(23, 'Alice', 'is this on?'); // [z1-0 t4-0 t3-0 t2-0] evict t1-0
   // z1-0: 23 'Alice' 'is this on?' 0
-  t.is(log.shift(), `set o+1/1 ${thingVal(0, 'thing-1', 0)}`); // evict t1-0
+  t.is(log.shift(), `set vom.o+1/1 ${thingVal(0, 'thing-1', 0)}`); // evict t1-0
   t.deepEqual(log, []);
 
   const zot2 = zotMaker(29, 'Bob', 'what are you saying?'); // [z2-0 z1-0 t4-0 t3-0] evict t2-0
   // z2-0: 29 'Bob' 'what are you saying?' 0
-  t.is(log.shift(), `set o+1/2 ${thingVal(100, 'thing-2', 0)}`); // evict t2-0
+  t.is(log.shift(), `set vom.o+1/2 ${thingVal(100, 'thing-2', 0)}`); // evict t2-0
   t.deepEqual(log, []);
 
   const zot3 = zotMaker(47, 'Carol', 'as if...'); // [z3-0 z2-0 z1-0 t4-0] evict t3-0
   // z3-0: 47 'Carol' 'as if...' 0
-  t.is(log.shift(), `set o+1/3 ${thingVal(200, 'thing-3', 0)}`); // evict t3-0
+  t.is(log.shift(), `set vom.o+1/3 ${thingVal(200, 'thing-3', 0)}`); // evict t3-0
   t.deepEqual(log, []);
 
   const zot4 = zotMaker(66, 'Dave', 'you and what army?'); // [z4-0 z3-0 z2-0 z1-0] evict t4-0
   // z4-0: 66 'Dave' 'you and what army?' 0
-  t.is(log.shift(), `set o+1/4 ${thingVal(300, 'thing-4', 0)}`); // evict t4-0
+  t.is(log.shift(), `set vom.o+1/4 ${thingVal(300, 'thing-4', 0)}`); // evict t4-0
   t.deepEqual(log, []);
 
   t.deepEqual(dumpStore(), [
-    ['o+1/1', thingVal(0, 'thing-1', 0)], // =t1-0
-    ['o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
-    ['o+1/3', thingVal(200, 'thing-3', 0)], // =t3-0
-    ['o+1/4', thingVal(300, 'thing-4', 0)], // =t4-0
+    ['vom.o+1/1', thingVal(0, 'thing-1', 0)], // =t1-0
+    ['vom.o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
+    ['vom.o+1/3', thingVal(200, 'thing-3', 0)], // =t3-0
+    ['vom.o+1/4', thingVal(300, 'thing-4', 0)], // =t4-0
   ]);
 
   // phase 2: first batch-o-stuff
   t.is(thing1.inc(), 1); // [t1-1 z4-0 z3-0 z2-0] evict z1-0
-  t.is(log.shift(), `set o+2/1 ${zotVal(23, 'Alice', 'is this on?', 0)}`); // evict z1-0
-  t.is(log.shift(), `get o+1/1 => ${thingVal(0, 'thing-1', 0)}`); // load t1-0
+  t.is(log.shift(), `set vom.o+2/1 ${zotVal(23, 'Alice', 'is this on?', 0)}`); // evict z1-0
+  t.is(log.shift(), `get vom.o+1/1 => ${thingVal(0, 'thing-1', 0)}`); // load t1-0
   t.deepEqual(log, []);
 
   // t1-1: 'thing-1' 1 0
   t.is(zot1.sayHello('hello'), 'hello Alice'); // [z1-1 t1-1 z4-0 z3-0] evict z2-0
-  t.is(log.shift(), `set o+2/2 ${zotVal(29, 'Bob', 'what are you saying?', 0)}`); // evict z2-0
-  t.is(log.shift(), `get o+2/1 => ${zotVal(23, 'Alice', 'is this on?', 0)}`); // load z1-0
+  t.is(log.shift(), `set vom.o+2/2 ${zotVal(29, 'Bob', 'what are you saying?', 0)}`); // evict z2-0
+  t.is(log.shift(), `get vom.o+2/1 => ${zotVal(23, 'Alice', 'is this on?', 0)}`); // load z1-0
   t.deepEqual(log, []);
 
   // z1-1: 23 'Alice' 'is this on?' 1
@@ -148,8 +148,8 @@ test('virtual object operations', t => {
 
   // t1-2: 'thing-1' 2 0
   t.is(zot2.sayHello('hi'), 'hi Bob'); // [z2-1 t1-2 z1-1 z4-0] evict z3-0
-  t.is(log.shift(), `set o+2/3 ${zotVal(47, 'Carol', 'as if...', 0)}`); // evict z3-0
-  t.is(log.shift(), `get o+2/2 => ${zotVal(29, 'Bob', 'what are you saying?', 0)}`); // load z2-0
+  t.is(log.shift(), `set vom.o+2/3 ${zotVal(47, 'Carol', 'as if...', 0)}`); // evict z3-0
+  t.is(log.shift(), `get vom.o+2/2 => ${zotVal(29, 'Bob', 'what are you saying?', 0)}`); // load z2-0
   t.deepEqual(log, []);
 
   // z2-1: 29 'Bob' 'what are you saying?' 1
@@ -158,20 +158,20 @@ test('virtual object operations', t => {
 
   // t1-3: 'thing-1' 3 0
   t.is(zot3.sayHello('aloha'), 'aloha Carol'); // [z3-1 t1-3 z2-1 z1-1] evict z4-0
-  t.is(log.shift(), `set o+2/4 ${zotVal(66, 'Dave', 'you and what army?', 0)}`); // evict z4-0
-  t.is(log.shift(), `get o+2/3 => ${zotVal(47, 'Carol', 'as if...', 0)}`); // load z3-0
+  t.is(log.shift(), `set vom.o+2/4 ${zotVal(66, 'Dave', 'you and what army?', 0)}`); // evict z4-0
+  t.is(log.shift(), `get vom.o+2/3 => ${zotVal(47, 'Carol', 'as if...', 0)}`); // load z3-0
   t.deepEqual(log, []);
 
   // z3-1: 47 'Carol' 'as if...' 1
   t.is(zot4.sayHello('bonjour'), 'bonjour Dave'); // [z4-1 z3-1 t1-3 z2-1] evict z1-1
-  t.is(log.shift(), `set o+2/1 ${zotVal(23, 'Alice', 'is this on?', 1)}`); // evict z1-1
-  t.is(log.shift(), `get o+2/4 => ${zotVal(66, 'Dave', 'you and what army?', 0)}`); // load z4-0
+  t.is(log.shift(), `set vom.o+2/1 ${zotVal(23, 'Alice', 'is this on?', 1)}`); // evict z1-1
+  t.is(log.shift(), `get vom.o+2/4 => ${zotVal(66, 'Dave', 'you and what army?', 0)}`); // load z4-0
   t.deepEqual(log, []);
 
   // z4-1: 66 'Dave' 'you and what army?' 1
   t.is(zot1.sayHello('hello again'), 'hello again Alice'); // [z1-2 z4-1 z3-1 t1-3] evict z2-1
-  t.is(log.shift(), `set o+2/2 ${zotVal(29, 'Bob', 'what are you saying?', 1)}`); // evict z2-1
-  t.is(log.shift(), `get o+2/1 => ${zotVal(23, 'Alice', 'is this on?', 1)}`); // get z1-1
+  t.is(log.shift(), `set vom.o+2/2 ${zotVal(29, 'Bob', 'what are you saying?', 1)}`); // evict z2-1
+  t.is(log.shift(), `get vom.o+2/1 => ${zotVal(23, 'Alice', 'is this on?', 1)}`); // get z1-1
   t.deepEqual(log, []);
 
   // z1-2: 23 'Alice' 'is this on?' 2
@@ -179,25 +179,25 @@ test('virtual object operations', t => {
     thing2.describe(), // [t2-0 z1-2 z4-1 z3-1] evict t1-3
     'thing-2 counter has been reset 0 times and is now 100',
   );
-  t.is(log.shift(), `set o+1/1 ${thingVal(3, 'thing-1', 0)}`); // evict t1-3
-  t.is(log.shift(), `get o+1/2 => ${thingVal(100, 'thing-2', 0)}`); // load t2-0
+  t.is(log.shift(), `set vom.o+1/1 ${thingVal(3, 'thing-1', 0)}`); // evict t1-3
+  t.is(log.shift(), `get vom.o+1/2 => ${thingVal(100, 'thing-2', 0)}`); // load t2-0
   t.deepEqual(log, []);
 
   t.deepEqual(dumpStore(), [
-    ['o+1/1', thingVal(3, 'thing-1', 0)], // =t1-3
-    ['o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
-    ['o+1/3', thingVal(200, 'thing-3', 0)], // =t3-0
-    ['o+1/4', thingVal(300, 'thing-4', 0)], // =t4-0
-    ['o+2/1', zotVal(23, 'Alice', 'is this on?', 1)], // =z1-1
-    ['o+2/2', zotVal(29, 'Bob', 'what are you saying?', 1)], // =z2-1
-    ['o+2/3', zotVal(47, 'Carol', 'as if...', 0)], // =z3-0
-    ['o+2/4', zotVal(66, 'Dave', 'you and what army?', 0)], // =z4-0
+    ['vom.o+1/1', thingVal(3, 'thing-1', 0)], // =t1-3
+    ['vom.o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
+    ['vom.o+1/3', thingVal(200, 'thing-3', 0)], // =t3-0
+    ['vom.o+1/4', thingVal(300, 'thing-4', 0)], // =t4-0
+    ['vom.o+2/1', zotVal(23, 'Alice', 'is this on?', 1)], // =z1-1
+    ['vom.o+2/2', zotVal(29, 'Bob', 'what are you saying?', 1)], // =z2-1
+    ['vom.o+2/3', zotVal(47, 'Carol', 'as if...', 0)], // =z3-0
+    ['vom.o+2/4', zotVal(66, 'Dave', 'you and what army?', 0)], // =z4-0
   ]);
 
   // phase 3: second batch-o-stuff
   t.is(thing1.get(), 3); // [t1-3 t2-0 z1-2 z4-1] evict z3-1
-  t.is(log.shift(), `set o+2/3 ${zotVal(47, 'Carol', 'as if...', 1)}`); // evict z3-1
-  t.is(log.shift(), `get o+1/1 => ${thingVal(3, 'thing-1', 0)}`); // load t1-3
+  t.is(log.shift(), `set vom.o+2/3 ${zotVal(47, 'Carol', 'as if...', 1)}`); // evict z3-1
+  t.is(log.shift(), `get vom.o+1/1 => ${thingVal(3, 'thing-1', 0)}`); // load t1-3
   t.deepEqual(log, []);
 
   t.is(thing1.inc(), 4); // [t1-4 t2-0 z1-2 z4-1]
@@ -205,26 +205,26 @@ test('virtual object operations', t => {
 
   // t1-4: 'thing-1' 4 0
   t.is(thing4.reset(1000), 1); // [t4-1 t1-4 t2-0 z1-2] evict z4-1
-  t.is(log.shift(), `set o+2/4 ${zotVal(66, 'Dave', 'you and what army?', 1)}`); // evict z4-1
-  t.is(log.shift(), `get o+1/4 => ${thingVal(300, 'thing-4', 0)}`); // load t4-0
+  t.is(log.shift(), `set vom.o+2/4 ${zotVal(66, 'Dave', 'you and what army?', 1)}`); // evict z4-1
+  t.is(log.shift(), `get vom.o+1/4 => ${thingVal(300, 'thing-4', 0)}`); // load t4-0
   t.deepEqual(log, []);
 
   // t4-1: 'thing-4' 1000 1
   t.is(zot3.rename('Chester'), 'Chester'); // [z3-2 t4-1 t1-4 t2-0] evict z1-2
-  t.is(log.shift(), `set o+2/1 ${zotVal(23, 'Alice', 'is this on?', 2)}`); // evict z1-2
-  t.is(log.shift(), `get o+2/3 => ${zotVal(47, 'Carol', 'as if...', 1)}`); // load z3-1
+  t.is(log.shift(), `set vom.o+2/1 ${zotVal(23, 'Alice', 'is this on?', 2)}`); // evict z1-2
+  t.is(log.shift(), `get vom.o+2/3 => ${zotVal(47, 'Carol', 'as if...', 1)}`); // load z3-1
   t.deepEqual(log, []);
 
   // z3-2: 47 'Chester' 'as if...' 2
   t.is(zot1.getInfo(), 'zot Alice tag=is this on? count=3 arbitrary=23'); // [z1-3 z3-2 t4-1 t1-4] evict t2-0
   // evict t2-0 does nothing because t2 is not dirty
-  t.is(log.shift(), `get o+2/1 => ${zotVal(23, 'Alice', 'is this on?', 2)}`); // load z1-2
+  t.is(log.shift(), `get vom.o+2/1 => ${zotVal(23, 'Alice', 'is this on?', 2)}`); // load z1-2
   t.deepEqual(log, []);
 
   // z1-3: 23 'Alice' 'is this on?' 3
   t.is(zot2.getInfo(), 'zot Bob tag=what are you saying? count=2 arbitrary=29'); // [z2-2 z1-3 z3-2 t4-1] evict t1-4
-  t.is(log.shift(), `set o+1/1 ${thingVal(4, 'thing-1', 0)}`); // evict t1-4
-  t.is(log.shift(), `get o+2/2 => ${zotVal(29, 'Bob', 'what are you saying?', 1)}`); // load z2-1
+  t.is(log.shift(), `set vom.o+1/1 ${thingVal(4, 'thing-1', 0)}`); // evict t1-4
+  t.is(log.shift(), `get vom.o+2/2 => ${zotVal(29, 'Bob', 'what are you saying?', 1)}`); // load z2-1
   t.deepEqual(log, []);
 
   // z2-2: 29 'Bob' 'what are you saying?' 1
@@ -232,8 +232,8 @@ test('virtual object operations', t => {
     thing2.describe(), // [t2-0 z2-2 z1-3 z3-2] evict t4-1
     'thing-2 counter has been reset 0 times and is now 100',
   );
-  t.is(log.shift(), `set o+1/4 ${thingVal(1000, 'thing-4', 1)}`); // evict t4-1
-  t.is(log.shift(), `get o+1/2 => ${thingVal(100, 'thing-2', 0)}`); // load t2-0
+  t.is(log.shift(), `set vom.o+1/4 ${thingVal(1000, 'thing-4', 1)}`); // evict t4-1
+  t.is(log.shift(), `get vom.o+1/2 => ${thingVal(100, 'thing-2', 0)}`); // load t2-0
   t.deepEqual(log, []);
 
   t.is(zot3.getInfo(), 'zot Chester tag=as if... count=3 arbitrary=47'); // [z3-3 t2-0 z2-2 z1-3]
@@ -241,14 +241,14 @@ test('virtual object operations', t => {
 
   // z3-3: 47 'Chester' 'as if...' 3
   t.is(zot4.getInfo(), 'zot Dave tag=you and what army? count=2 arbitrary=66'); // [z4-1 z3-3 t2-0 z2-2] evict z1-3
-  t.is(log.shift(), `set o+2/1 ${zotVal(23, 'Alice', 'is this on?', 3)}`); // evict z1-3
-  t.is(log.shift(), `get o+2/4 => ${zotVal(66, 'Dave', 'you and what army?', 1)}`); // load z4-1
+  t.is(log.shift(), `set vom.o+2/1 ${zotVal(23, 'Alice', 'is this on?', 3)}`); // evict z1-3
+  t.is(log.shift(), `get vom.o+2/4 => ${zotVal(66, 'Dave', 'you and what army?', 1)}`); // load z4-1
   t.deepEqual(log, []);
 
   // z4-2: 66 'Dave' 'you and what army?' 2
   t.is(thing3.inc(), 201); // [t3-1 z4-2 z3-3 t2-0] evict z2-2
-  t.is(log.shift(), `set o+2/2 ${zotVal(29, 'Bob', 'what are you saying?', 2)}`); // evict z2-2
-  t.is(log.shift(), `get o+1/3 => ${thingVal(200, 'thing-3', 0)}`); // load t3-0
+  t.is(log.shift(), `set vom.o+2/2 ${zotVal(29, 'Bob', 'what are you saying?', 2)}`); // evict z2-2
+  t.is(log.shift(), `get vom.o+1/3 => ${thingVal(200, 'thing-3', 0)}`); // load t3-0
   t.deepEqual(log, []);
 
   // t3-1: 'thing-3' 201 0
@@ -257,43 +257,43 @@ test('virtual object operations', t => {
     'thing-4 counter has been reset 1 times and is now 1000',
   );
   // evict t2-0 does nothing because t2 is not dirty
-  t.is(log.shift(), `get o+1/4 => ${thingVal(1000, 'thing-4', 1)}`); // load t4-1
+  t.is(log.shift(), `get vom.o+1/4 => ${thingVal(1000, 'thing-4', 1)}`); // load t4-1
   t.deepEqual(log, []);
 
   t.deepEqual(dumpStore(), [
-    ['o+1/1', thingVal(4, 'thing-1', 0)], // =t1-4
-    ['o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
-    ['o+1/3', thingVal(200, 'thing-3', 0)], // =t3-0
-    ['o+1/4', thingVal(1000, 'thing-4', 1)], // =t4-1
-    ['o+2/1', zotVal(23, 'Alice', 'is this on?', 3)], // =z1-3
-    ['o+2/2', zotVal(29, 'Bob', 'what are you saying?', 2)], // =z2-2
-    ['o+2/3', zotVal(47, 'Carol', 'as if...', 1)], // =z3-1
-    ['o+2/4', zotVal(66, 'Dave', 'you and what army?', 1)], // =z4-1
+    ['vom.o+1/1', thingVal(4, 'thing-1', 0)], // =t1-4
+    ['vom.o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
+    ['vom.o+1/3', thingVal(200, 'thing-3', 0)], // =t3-0
+    ['vom.o+1/4', thingVal(1000, 'thing-4', 1)], // =t4-1
+    ['vom.o+2/1', zotVal(23, 'Alice', 'is this on?', 3)], // =z1-3
+    ['vom.o+2/2', zotVal(29, 'Bob', 'what are you saying?', 2)], // =z2-2
+    ['vom.o+2/3', zotVal(47, 'Carol', 'as if...', 1)], // =z3-1
+    ['vom.o+2/4', zotVal(66, 'Dave', 'you and what army?', 1)], // =z4-1
   ]);
 
   // phase 4: flush test
   t.is(thing1.inc(), 5); // [t1-5 t4-1 t3-1 z4-2] evict z3-3
-  t.is(log.shift(), `set o+2/3 ${zotVal(47, 'Chester', 'as if...', 3)}`); // evict z3-3
-  t.is(log.shift(), `get o+1/1 => ${thingVal(4, 'thing-1', 0)}`); // load t1-4
+  t.is(log.shift(), `set vom.o+2/3 ${zotVal(47, 'Chester', 'as if...', 3)}`); // evict z3-3
+  t.is(log.shift(), `get vom.o+1/1 => ${thingVal(4, 'thing-1', 0)}`); // load t1-4
   t.deepEqual(log, []);
 
   // t1-5: 'thing-1' 5 0
   flushCache(); // [] evict z4-2 t3-1 t4-1 t1-5
-  t.is(log.shift(), `set o+2/4 ${zotVal(66, 'Dave', 'you and what army?', 2)}`); // evict z4-2
-  t.is(log.shift(), `set o+1/3 ${thingVal(201, 'thing-3', 0)}`); // evict t3-1
+  t.is(log.shift(), `set vom.o+2/4 ${zotVal(66, 'Dave', 'you and what army?', 2)}`); // evict z4-2
+  t.is(log.shift(), `set vom.o+1/3 ${thingVal(201, 'thing-3', 0)}`); // evict t3-1
   // evict t4-1 does nothing because t4 is not dirty
-  t.is(log.shift(), `set o+1/1 ${thingVal(5, 'thing-1', 0)}`); // evict t1-5
+  t.is(log.shift(), `set vom.o+1/1 ${thingVal(5, 'thing-1', 0)}`); // evict t1-5
   t.deepEqual(log, []);
 
   t.deepEqual(dumpStore(), [
-    ['o+1/1', thingVal(5, 'thing-1', 0)], // =t1-5
-    ['o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
-    ['o+1/3', thingVal(201, 'thing-3', 0)], // =t3-1
-    ['o+1/4', thingVal(1000, 'thing-4', 1)], // =t4-1
-    ['o+2/1', zotVal(23, 'Alice', 'is this on?', 3)], // =z1-3
-    ['o+2/2', zotVal(29, 'Bob', 'what are you saying?', 2)], // =z2-2
-    ['o+2/3', zotVal(47, 'Chester', 'as if...', 3)], // =z3-3
-    ['o+2/4', zotVal(66, 'Dave', 'you and what army?', 2)], // =z4-2
+    ['vom.o+1/1', thingVal(5, 'thing-1', 0)], // =t1-5
+    ['vom.o+1/2', thingVal(100, 'thing-2', 0)], // =t2-0
+    ['vom.o+1/3', thingVal(201, 'thing-3', 0)], // =t3-1
+    ['vom.o+1/4', thingVal(1000, 'thing-4', 1)], // =t4-1
+    ['vom.o+2/1', zotVal(23, 'Alice', 'is this on?', 3)], // =z1-3
+    ['vom.o+2/2', zotVal(29, 'Bob', 'what are you saying?', 2)], // =z2-2
+    ['vom.o+2/3', zotVal(47, 'Chester', 'as if...', 3)], // =z3-3
+    ['vom.o+2/4', zotVal(66, 'Dave', 'you and what army?', 2)], // =z4-2
   ]);
 });