diff --git a/a3p-integration/README.md b/a3p-integration/README.md
index 6076bb3509f..5318bbba750 100644
--- a/a3p-integration/README.md
+++ b/a3p-integration/README.md
@@ -108,11 +108,37 @@ Instead of relying on an automatic `submission` folder, a core-eval proposal can
 
 # Build details
 
+In the `ghcr.io/agoric/agoric-sdk` image the filesystem is:
+```
+/usr/src/agoric-sdk
+```
+
+With the proposals layered on top of the `agoric-sdk` image, the filesystem adds (for example):
+```
+/usr/src/proposals/n:upgrade-next
+/usr/src/proposals/z:acceptance
+```
+
+In agoric-sdk CI and development, we want the proposals to use the versions of the packages in the agoric-sdk source tree. To accomplish this we use `yarn link`. In Yarn 4 (berry) it uses a `portal` protocol to link to another Yarn project on the filesystem. One kink is that in development the command would,
+```
+yarn link --relative ../../.. --all
+```
+Which configures the package.json resolutions to find agoric-sdk three levels up.
+
+But in CI the proposals aren't nested under agoric-sdk and the command would be,
+```
+yarn link --relative ../../agoric-sdk --all
+```
+
+To give a consistent location, `a3p-integration` has a symlink to the `agoric-sdk` project where the proposals expect it in the Docker fileystem. (I.e. treating `a3p-integration` as `/usr/src` of the Docker image.)
+
+
 The `yarn build` script automates 3 steps:
 - Building the `unreleased` SDK image
 - Generating the `submission` folders in core proposal packages
 - Building the synthetic-chain images using the proposals
 
+
 ## Generate a docker image with the `agoric-sdk` chain software
 
 The chain software upgrade proposal contained in this end-to-end integration test performs an upgrade of the agoric-3 synthetic chain to an `UNRELEASED_A3P_INTEGRATION` plan name (or the corresponding upgrade plan name for release branches). It loads the docker image `ghcr.io/agoric/agoric-sdk:unreleased` for the software implementing that upgrade (both in the `master` branch or in release branches).
diff --git a/a3p-integration/agoric-sdk b/a3p-integration/agoric-sdk
new file mode 120000
index 00000000000..b870225aa05
--- /dev/null
+++ b/a3p-integration/agoric-sdk
@@ -0,0 +1 @@
+../
\ No newline at end of file
diff --git a/a3p-integration/package.json b/a3p-integration/package.json
index ee9bb0a570a..c0aac139b14 100644
--- a/a3p-integration/package.json
+++ b/a3p-integration/package.json
@@ -16,6 +16,6 @@
     "@agoric/synthetic-chain": "^0.3.0",
     "@types/better-sqlite3": "^7.6.11"
   },
-  "packageManager": "yarn@4.2.2",
+  "packageManager": "yarn@4.5.1",
   "license": "Apache-2.0"
 }
diff --git a/a3p-integration/proposals/n:upgrade-next/package.json b/a3p-integration/proposals/n:upgrade-next/package.json
index af2361a9a58..fccfe2b2701 100644
--- a/a3p-integration/proposals/n:upgrade-next/package.json
+++ b/a3p-integration/proposals/n:upgrade-next/package.json
@@ -12,11 +12,11 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@agoric/synthetic-chain": "^0.3.0",
-    "@endo/init": "^1.1.5",
-    "@endo/marshal": "^1.5.4",
+    "@endo/init": "^1.1.6",
+    "@endo/marshal": "^1.6.1",
     "ava": "^5.3.1",
     "better-sqlite3": "^9.6.0",
-    "execa": "^9.3.1"
+    "execa": "^9.5.1"
   },
   "ava": {
     "concurrency": 1,
@@ -28,5 +28,8 @@
   "scripts": {
     "agops": "yarn --cwd /usr/src/agoric-sdk/ --silent agops"
   },
-  "packageManager": "yarn@4.2.2"
+  "packageManager": "yarn@4.5.1",
+  "devDependencies": {
+    "typescript": "^5.6.3"
+  }
 }
diff --git a/a3p-integration/proposals/n:upgrade-next/priceFeedUpdate.test.js b/a3p-integration/proposals/n:upgrade-next/priceFeedUpdate.test.js
index d0bdaa1b055..104ff759465 100644
--- a/a3p-integration/proposals/n:upgrade-next/priceFeedUpdate.test.js
+++ b/a3p-integration/proposals/n:upgrade-next/priceFeedUpdate.test.js
@@ -83,6 +83,7 @@ const openMarginalVault = async t => {
   const currentVaults = await agops.vaults('list', '--from', USER1ADDR);
 
   t.log('opening a vault');
+  // @ts-expect-error bad typedef
   await openVault(USER1ADDR, 5, 10);
   user1IST += 5;
   const istBalanceAfterVaultOpen = await getISTBalance(USER1ADDR);
diff --git a/a3p-integration/proposals/n:upgrade-next/sync-tools.js b/a3p-integration/proposals/n:upgrade-next/sync-tools.js
deleted file mode 100644
index 4a0e727c465..00000000000
--- a/a3p-integration/proposals/n:upgrade-next/sync-tools.js
+++ /dev/null
@@ -1,72 +0,0 @@
-/* eslint-env node */
-
-/**
- * @file These tools mostly duplicate code that will be added in other PRs
- * and eventually migrated to synthetic-chain. Sorry for the duplication.
- */
-
-/**
- * @typedef {object} RetryOptions
- * @property {number} [maxRetries]
- * @property {number} [retryIntervalMs]
- * @property {(...arg0: string[]) => void} log
- * @property {(object) => void} [setTimeout]
- * @property {string} [errorMessage=Error]
- */
-
-const ambientSetTimeout = global.setTimeout;
-
-/**
- * From https://github.com/Agoric/agoric-sdk/blob/442f07c8f0af03281b52b90e90c27131eef6f331/multichain-testing/tools/sleep.ts#L10
- *
- * @param {number} ms
- * @param {*} sleepOptions
- */
-const sleep = (ms, { log = () => {}, setTimeout = ambientSetTimeout }) =>
-  new Promise(resolve => {
-    log(`Sleeping for ${ms}ms...`);
-    setTimeout(resolve, ms);
-  });
-
-/**
- * From https://github.com/Agoric/agoric-sdk/blob/442f07c8f0af03281b52b90e90c27131eef6f331/multichain-testing/tools/sleep.ts#L24
- *
- * @param {() => Promise} operation
- * @param {(result: any) => boolean} condition
- * @param {string} message
- * @param {RetryOptions} options
- */
-export const retryUntilCondition = async (
-  operation,
-  condition,
-  message,
-  { maxRetries = 6, retryIntervalMs = 3500, log, setTimeout },
-) => {
-  console.log({ maxRetries, retryIntervalMs, message });
-  let retries = 0;
-
-  await null;
-  while (retries < maxRetries) {
-    try {
-      const result = await operation();
-      log('RESULT', result);
-      if (condition(result)) {
-        return result;
-      }
-    } catch (error) {
-      if (error instanceof Error) {
-        log(`Error: ${error.message}`);
-      } else {
-        log(`Unknown error: ${String(error)}`);
-      }
-    }
-
-    retries += 1;
-    console.log(
-      `Retry ${retries}/${maxRetries} - Waiting for ${retryIntervalMs}ms for ${message}...`,
-    );
-    await sleep(retryIntervalMs, { log, setTimeout });
-  }
-
-  throw Error(`${message} condition failed after ${maxRetries} retries.`);
-};
diff --git a/a3p-integration/proposals/n:upgrade-next/tsconfig.json b/a3p-integration/proposals/n:upgrade-next/tsconfig.json
index 39de5a422e9..d3e64ee5baf 100644
--- a/a3p-integration/proposals/n:upgrade-next/tsconfig.json
+++ b/a3p-integration/proposals/n:upgrade-next/tsconfig.json
@@ -1,12 +1,14 @@
 {
   "compilerOptions": {
-    "target": "esnext",
-    "module": "esnext",
+    "target": "ESNext",
+    "module": "NodeNext",
     "allowJs": true,
     "checkJs": true,
     "strict": false,
     "strictNullChecks": true,
     "noEmit": true,
-    "noImplicitThis": true
+    "noImplicitThis": true,
+    // XXX synthetic-chain has some errors
+    "skipLibCheck": true
   }
 }
diff --git a/a3p-integration/proposals/n:upgrade-next/yarn.lock b/a3p-integration/proposals/n:upgrade-next/yarn.lock
index 78dc133a0f9..2c0ecacf2c3 100644
--- a/a3p-integration/proposals/n:upgrade-next/yarn.lock
+++ b/a3p-integration/proposals/n:upgrade-next/yarn.lock
@@ -27,14 +27,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@endo/common@npm:^1.2.6":
-  version: 1.2.6
-  resolution: "@endo/common@npm:1.2.6"
+"@endo/common@npm:^1.2.7":
+  version: 1.2.7
+  resolution: "@endo/common@npm:1.2.7"
   dependencies:
-    "@endo/errors": "npm:^1.2.6"
-    "@endo/eventual-send": "npm:^1.2.6"
-    "@endo/promise-kit": "npm:^1.1.6"
-  checksum: 10c0/7cca372677bd1ab535a0f8fc250eca9bfc202ef7dfd24cac6ff1260003aa4512f8db18419dd632b3e57270a589fec54891496904ff2e8a97047f1e187e3f1401
+    "@endo/errors": "npm:^1.2.7"
+    "@endo/eventual-send": "npm:^1.2.7"
+    "@endo/promise-kit": "npm:^1.1.7"
+  checksum: 10c0/2bd25ffc528afd6308b6168650583977139c64e56547b3ea2fee313e01650fb1a041d7b7ce54c6bb70f26c9e78345db2a50fbe3ebccabe9a5c5696eda2cca706
   languageName: node
   linkType: hard
 
@@ -45,85 +45,85 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@endo/errors@npm:^1.2.6":
-  version: 1.2.6
-  resolution: "@endo/errors@npm:1.2.6"
+"@endo/errors@npm:^1.2.7":
+  version: 1.2.7
+  resolution: "@endo/errors@npm:1.2.7"
   dependencies:
-    ses: "npm:^1.9.0"
-  checksum: 10c0/cbc541c2d26fbfeb1567dd1cdf0e1f110ee9866430c5a1b91d87270d6f00bc8293cc8512301217c4eda35e60677ce62a941d11eb32c7da1f72d450a011ad2bb5
+    ses: "npm:^1.9.1"
+  checksum: 10c0/17eed5d01dd968d8e266db37ac44e76859d14894a2b70457d120f2f05021819671aaf1bdf7dc7c2506b84f6df616402e029695d62309fbdbdd13ed4ba34890dd
   languageName: node
   linkType: hard
 
-"@endo/eventual-send@npm:^1.2.6":
-  version: 1.2.6
-  resolution: "@endo/eventual-send@npm:1.2.6"
+"@endo/eventual-send@npm:^1.2.7":
+  version: 1.2.7
+  resolution: "@endo/eventual-send@npm:1.2.7"
   dependencies:
     "@endo/env-options": "npm:^1.1.7"
-  checksum: 10c0/6983d6b88bf4e99f6c469d4ca037793582b06cc0bfa2da085b5bc7ad67333a1fba6e5e7077b7f279be23ccfba1dff9e06c7f85f9980b09fd002227f89a673c11
+  checksum: 10c0/4a483169bcd9ead47a7a07d3f69bdebdc0d1e2a3198f35ad422b82c1646b64528234bdddc9e0544ac38c2ede84a50af1e126eb4086aa8b4ae4b0002895b55e86
   languageName: node
   linkType: hard
 
-"@endo/init@npm:^1.1.5":
-  version: 1.1.5
-  resolution: "@endo/init@npm:1.1.5"
+"@endo/init@npm:^1.1.6":
+  version: 1.1.6
+  resolution: "@endo/init@npm:1.1.6"
   dependencies:
     "@endo/base64": "npm:^1.0.8"
-    "@endo/eventual-send": "npm:^1.2.6"
-    "@endo/lockdown": "npm:^1.0.11"
-    "@endo/promise-kit": "npm:^1.1.6"
-  checksum: 10c0/08abda8a0204450cb39c296270d074189f320cdeb03892e87b27a75f6b98c0b5d9c8471e242c53545843211fe713b01b281eec0eabc1c58ca0760a068b90335c
+    "@endo/eventual-send": "npm:^1.2.7"
+    "@endo/lockdown": "npm:^1.0.12"
+    "@endo/promise-kit": "npm:^1.1.7"
+  checksum: 10c0/1885429e475c780bb5b7ff0fd4fcd5d76bc3a5cb1c3c2f9f2dfc06152ff1c8c3be512b6760483c8c18598e1977129cb3dd766a32c9f6efb19d70b54a1844c683
   languageName: node
   linkType: hard
 
-"@endo/lockdown@npm:^1.0.11":
-  version: 1.0.11
-  resolution: "@endo/lockdown@npm:1.0.11"
+"@endo/lockdown@npm:^1.0.12":
+  version: 1.0.12
+  resolution: "@endo/lockdown@npm:1.0.12"
   dependencies:
-    ses: "npm:^1.9.0"
-  checksum: 10c0/03bb96f370e7ee69d9d8e26b7b124b6381994d3b28a99dc2bcafe77139283701d7543b40e978226cd49443c149e64610e4dd49c32ada931610ba091809478a11
+    ses: "npm:^1.9.1"
+  checksum: 10c0/0b9d36f359ffe8eadd1e799aa0340ccb0680d48c9b6249c380c27724824c4d875dada9fbec096fb4e2ac76b32c7536955524d3eb6579451a618707602fb958f4
   languageName: node
   linkType: hard
 
-"@endo/marshal@npm:^1.5.4":
-  version: 1.5.4
-  resolution: "@endo/marshal@npm:1.5.4"
+"@endo/marshal@npm:^1.6.1":
+  version: 1.6.1
+  resolution: "@endo/marshal@npm:1.6.1"
   dependencies:
-    "@endo/common": "npm:^1.2.6"
-    "@endo/errors": "npm:^1.2.6"
-    "@endo/eventual-send": "npm:^1.2.6"
-    "@endo/nat": "npm:^5.0.11"
-    "@endo/pass-style": "npm:^1.4.4"
-    "@endo/promise-kit": "npm:^1.1.6"
-  checksum: 10c0/4668a3678567cfbeefc3a47217912ca3f5d8bdb37e0d5d53339953b4ab83950683505f45c0f5c30b415c989bb9df4fa0859849d23b11f5b1064b0da0a13943ab
+    "@endo/common": "npm:^1.2.7"
+    "@endo/errors": "npm:^1.2.7"
+    "@endo/eventual-send": "npm:^1.2.7"
+    "@endo/nat": "npm:^5.0.12"
+    "@endo/pass-style": "npm:^1.4.6"
+    "@endo/promise-kit": "npm:^1.1.7"
+  checksum: 10c0/e64983abccd833b2a7eb63547e8c5a629f073d3e422229475d470ace95c2640a89e9a9879c46e8389cca8c9e75823ea1c27e27cbeeb8c1c4005146b2c530c530
   languageName: node
   linkType: hard
 
-"@endo/nat@npm:^5.0.11":
-  version: 5.0.11
-  resolution: "@endo/nat@npm:5.0.11"
-  checksum: 10c0/50cd9033657dd35288f0333a966984f788213f1c836e6772c0d731361d5854d0ce24b8a7d6f351d56618eb40f6b369e130c1ad939c83d5833246c09119b2e777
+"@endo/nat@npm:^5.0.12":
+  version: 5.0.12
+  resolution: "@endo/nat@npm:5.0.12"
+  checksum: 10c0/deb792b6a0c9fe9c0e7cf74cc725d8bc36934571f4f06ac3b6def2a0622ac79b0278753c574f9b55a88b063d1186fd6971bbe63326077a7d37982c4c37a1a24c
   languageName: node
   linkType: hard
 
-"@endo/pass-style@npm:^1.4.4":
-  version: 1.4.4
-  resolution: "@endo/pass-style@npm:1.4.4"
+"@endo/pass-style@npm:^1.4.6":
+  version: 1.4.6
+  resolution: "@endo/pass-style@npm:1.4.6"
   dependencies:
     "@endo/env-options": "npm:^1.1.7"
-    "@endo/errors": "npm:^1.2.6"
-    "@endo/eventual-send": "npm:^1.2.6"
-    "@endo/promise-kit": "npm:^1.1.6"
+    "@endo/errors": "npm:^1.2.7"
+    "@endo/eventual-send": "npm:^1.2.7"
+    "@endo/promise-kit": "npm:^1.1.7"
     "@fast-check/ava": "npm:^1.1.5"
-  checksum: 10c0/d6c6268b269d4c14541087ce6b2975f9e31847893d01360c0ea92392ae93316d94fbf59cd7299853a0fb5214176ad7ffc4616b9b2581fd720bdb55ef96d0beeb
+  checksum: 10c0/fec9d21bb4c70314e92c72f7ae41ec147ac839a23d54f613d689b84f81206e49e657f3fb414db454cbd6ab67dd2a319b1ae25c42b3a1c881edd5de120496b8b4
   languageName: node
   linkType: hard
 
-"@endo/promise-kit@npm:^1.1.6":
-  version: 1.1.6
-  resolution: "@endo/promise-kit@npm:1.1.6"
+"@endo/promise-kit@npm:^1.1.7":
+  version: 1.1.7
+  resolution: "@endo/promise-kit@npm:1.1.7"
   dependencies:
-    ses: "npm:^1.9.0"
-  checksum: 10c0/d60de663e58f9de32b6705268c62c63c4721f1874813d3c10cae7846e921e4ea8a60c8622ef8c937741a3387fbc60110076b25304afedf270727af7b0c3fecb3
+    ses: "npm:^1.9.1"
+  checksum: 10c0/98a8d743c437f106f266871874acd811c0e028fc89553738bbd46a0fea5871b9ba7ef0449ec38e7e3768fc21684993ecdbbd06f5f3429cd69fbe4b867d4c2bd5
   languageName: node
   linkType: hard
 
@@ -892,6 +892,26 @@ __metadata:
   languageName: node
   linkType: hard
 
+"execa@npm:^9.5.1":
+  version: 9.5.1
+  resolution: "execa@npm:9.5.1"
+  dependencies:
+    "@sindresorhus/merge-streams": "npm:^4.0.0"
+    cross-spawn: "npm:^7.0.3"
+    figures: "npm:^6.1.0"
+    get-stream: "npm:^9.0.0"
+    human-signals: "npm:^8.0.0"
+    is-plain-obj: "npm:^4.1.0"
+    is-stream: "npm:^4.0.1"
+    npm-run-path: "npm:^6.0.0"
+    pretty-ms: "npm:^9.0.0"
+    signal-exit: "npm:^4.1.0"
+    strip-final-newline: "npm:^4.0.0"
+    yoctocolors: "npm:^2.0.0"
+  checksum: 10c0/1a628d535c5a088f9e17a735bb3143efc4198095392b319ba877b2975d5c3c57724536dccb6f68f1cd9b3af331c5a9e8c1aeb338d52ab316b1e008ff453374a7
+  languageName: node
+  linkType: hard
+
 "expand-template@npm:^2.0.3":
   version: 2.0.3
   resolution: "expand-template@npm:2.0.3"
@@ -2009,11 +2029,12 @@ __metadata:
   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
     "@agoric/synthetic-chain": "npm:^0.3.0"
-    "@endo/init": "npm:^1.1.5"
-    "@endo/marshal": "npm:^1.5.4"
+    "@endo/init": "npm:^1.1.6"
+    "@endo/marshal": "npm:^1.6.1"
     ava: "npm:^5.3.1"
     better-sqlite3: "npm:^9.6.0"
-    execa: "npm:^9.3.1"
+    execa: "npm:^9.5.1"
+    typescript: "npm:^5.6.3"
   languageName: unknown
   linkType: soft
 
@@ -2069,12 +2090,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ses@npm:^1.9.0":
-  version: 1.9.0
-  resolution: "ses@npm:1.9.0"
+"ses@npm:^1.9.1":
+  version: 1.9.1
+  resolution: "ses@npm:1.9.1"
   dependencies:
     "@endo/env-options": "npm:^1.1.7"
-  checksum: 10c0/356f9601b04a87f33403a15fc627caf0c649d86d8d7ee1f4b3c75b947ab05c31b254c94c0aa26e9904862787c73950d5a60f3435deebe5dba23017e20c40b0cb
+  checksum: 10c0/1e795542954f635aaee2749a1d548460f2978257cb29daaea76b814ef99ffa64ab5cca05fbc3d51a814a57cf9fc4563988ee93312cc53bae4eb63dfff0f0682a
   languageName: node
   linkType: hard
 
@@ -2342,6 +2363,26 @@ __metadata:
   languageName: node
   linkType: hard
 
+"typescript@npm:^5.6.3":
+  version: 5.6.3
+  resolution: "typescript@npm:5.6.3"
+  bin:
+    tsc: bin/tsc
+    tsserver: bin/tsserver
+  checksum: 10c0/44f61d3fb15c35359bc60399cb8127c30bae554cd555b8e2b46d68fa79d680354b83320ad419ff1b81a0bdf324197b29affe6cc28988cd6a74d4ac60c94f9799
+  languageName: node
+  linkType: hard
+
+"typescript@patch:typescript@npm%3A^5.6.3#optional!builtin<compat/typescript>":
+  version: 5.6.3
+  resolution: "typescript@patch:typescript@npm%3A5.6.3#optional!builtin<compat/typescript>::version=5.6.3&hash=8c6c40"
+  bin:
+    tsc: bin/tsc
+    tsserver: bin/tsserver
+  checksum: 10c0/7c9d2e07c81226d60435939618c91ec2ff0b75fbfa106eec3430f0fcf93a584bc6c73176676f532d78c3594fe28a54b36eb40b3d75593071a7ec91301533ace7
+  languageName: node
+  linkType: hard
+
 "unicorn-magic@npm:^0.3.0":
   version: 0.3.0
   resolution: "unicorn-magic@npm:0.3.0"
diff --git a/a3p-integration/proposals/s:stake-bld/package.json b/a3p-integration/proposals/s:stake-bld/package.json
index 39c3d923c8a..477b95ba07a 100644
--- a/a3p-integration/proposals/s:stake-bld/package.json
+++ b/a3p-integration/proposals/s:stake-bld/package.json
@@ -23,5 +23,5 @@
   "ava": {
     "concurrency": 1
   },
-  "packageManager": "yarn@4.2.2"
+  "packageManager": "yarn@4.5.1"
 }
diff --git a/a3p-integration/proposals/s:stake-bld/test-lib/index.js b/a3p-integration/proposals/s:stake-bld/test-lib/index.js
index c6970eab1df..a35b9b94fe0 100644
--- a/a3p-integration/proposals/s:stake-bld/test-lib/index.js
+++ b/a3p-integration/proposals/s:stake-bld/test-lib/index.js
@@ -16,6 +16,6 @@ export const networkConfig = {
 const delay = ms => new Promise(resolve => setTimeout(() => resolve(), ms));
 
 export const walletUtils = await makeWalletUtils(
-  { delay, execFileSync, fetch },
+  { execFileSync, delay, fetch },
   networkConfig,
 );
diff --git a/a3p-integration/proposals/s:stake-bld/test-lib/rpc.js b/a3p-integration/proposals/s:stake-bld/test-lib/rpc.js
index 2cc3c34913f..1d62aedf1be 100644
--- a/a3p-integration/proposals/s:stake-bld/test-lib/rpc.js
+++ b/a3p-integration/proposals/s:stake-bld/test-lib/rpc.js
@@ -234,7 +234,7 @@ export const makeAgoricNames = async (ctx, vstorage) => {
  * @param {{ fetch: typeof window.fetch }} io
  * @param {MinimalNetworkConfig} config
  */
-export const makeRpcUtils = async ({ fetch }, config = networkConfig) => {
+export const makeVstorageKit = async ({ fetch }, config = networkConfig) => {
   await null;
   try {
     const vstorage = makeVStorage({ fetch }, config);
@@ -263,4 +263,4 @@ export const makeRpcUtils = async ({ fetch }, config = networkConfig) => {
     throw Error(`RPC failure (${config.rpcAddrs}): ${err.message}`);
   }
 };
-/** @typedef {Awaited<ReturnType<typeof makeRpcUtils>>} RpcUtils */
+/** @typedef {Awaited<ReturnType<typeof makeVstorageKit>>} RpcUtils */
diff --git a/a3p-integration/proposals/s:stake-bld/test-lib/wallet.js b/a3p-integration/proposals/s:stake-bld/test-lib/wallet.js
index 5fbe9b70027..53d9634e278 100644
--- a/a3p-integration/proposals/s:stake-bld/test-lib/wallet.js
+++ b/a3p-integration/proposals/s:stake-bld/test-lib/wallet.js
@@ -6,84 +6,9 @@
 // @ts-check
 /* global */
 
-import { E, Far } from '@endo/far';
 import { inspect } from 'util';
 import { execSwingsetTransaction, pollTx } from './chain.js';
-import { makeRpcUtils } from './rpc.js';
-
-/** @import {CurrentWalletRecord} from '@agoric/smart-wallet/src/smartWallet.js' */
-/** @import {AgoricNamesRemotes} from '@agoric/vats/tools/board-utils.js' */
-
-/**
- * @template T
- * @param follower
- * @param [options]
- */
-export const iterateReverse = (follower, options) =>
-  // For now, just pass through the iterable.
-  Far('iterateReverse iterable', {
-    /** @returns {AsyncIterator<T>} */
-    [Symbol.asyncIterator]: () => {
-      const eachIterable = E(follower).getReverseIterable(options);
-      const iterator = E(eachIterable)[Symbol.asyncIterator]();
-      return Far('iterateEach iterator', {
-        next: () => E(iterator).next(),
-      });
-    },
-  });
-
-/** @type {CurrentWalletRecord} */
-const emptyCurrentRecord = {
-  purses: [],
-  offerToUsedInvitation: [],
-  offerToPublicSubscriberPaths: [],
-  liveOffers: [],
-};
-
-/**
- * @param {string} addr
- * @param {Pick<import('./rpc.js').RpcUtils, 'readLatestHead'>} io
- * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord>}
- */
-export const getCurrent = async (addr, { readLatestHead }) => {
-  // Partial because older writes may not have had all properties
-  // NB: assumes changes are only additions
-  let current =
-    /** @type {Partial<import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord> | undefined} */ (
-      await readLatestHead(`published.wallet.${addr}.current`)
-    );
-  if (current === undefined) {
-    throw Error(`undefined current node for ${addr}`);
-  }
-
-  // Repair a type misunderstanding seen in the wild.
-  // See https://github.com/Agoric/agoric-sdk/pull/7139
-  let offerToUsedInvitation = current.offerToUsedInvitation;
-  if (
-    offerToUsedInvitation &&
-    typeof offerToUsedInvitation === 'object' &&
-    !Array.isArray(offerToUsedInvitation)
-  ) {
-    offerToUsedInvitation = Object.entries(offerToUsedInvitation);
-    current = harden({
-      ...current,
-      offerToUsedInvitation,
-    });
-  }
-
-  // override full empty record with defined values from published one
-  return { ...emptyCurrentRecord, ...current };
-};
-
-/**
- * @param {string} addr
- * @param {Pick<import('./rpc.js').RpcUtils, 'readLatestHead'>} io
- * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').UpdateRecord>}
- */
-export const getLastUpdate = (addr, { readLatestHead }) => {
-  // @ts-expect-error cast
-  return readLatestHead(`published.wallet.${addr}`);
-};
+import { makeVstorageKit } from './rpc.js';
 
 /**
  * Sign and broadcast a wallet-action.
@@ -136,7 +61,7 @@ export const makeWalletUtils = async (
   networkConfig,
 ) => {
   const { agoricNames, fromBoard, marshaller, readLatestHead, vstorage } =
-    await makeRpcUtils({ fetch }, networkConfig);
+    await makeVstorageKit({ fetch }, networkConfig);
 
   /**
    *
diff --git a/a3p-integration/proposals/z:acceptance/core-eval.test.js b/a3p-integration/proposals/z:acceptance/core-eval.test.js
index 7b92e35a6cb..086613e9c65 100644
--- a/a3p-integration/proposals/z:acceptance/core-eval.test.js
+++ b/a3p-integration/proposals/z:acceptance/core-eval.test.js
@@ -4,7 +4,7 @@ import test from 'ava';
 import { readFile, writeFile } from 'node:fs/promises';
 
 import { agd, evalBundles } from '@agoric/synthetic-chain';
-import { retryUntilCondition } from './test-lib/sync-tools.js';
+import { retryUntilCondition } from '@agoric/client-utils';
 
 const SUBMISSION_DIR = 'core-eval-test-submission';
 
@@ -20,6 +20,7 @@ const replaceTemplateValuesInFile = async (fileName, replacements) => {
   await writeFile(`${fileName}.js`, script);
 };
 
+/** @param {string} path */
 const readPublished = async path => {
   const { value } = await agd.query(
     'vstorage',
diff --git a/a3p-integration/proposals/z:acceptance/governance.test.js b/a3p-integration/proposals/z:acceptance/governance.test.js
index 7e4b23b5418..31a8642dddd 100644
--- a/a3p-integration/proposals/z:acceptance/governance.test.js
+++ b/a3p-integration/proposals/z:acceptance/governance.test.js
@@ -1,35 +1,34 @@
 /* global fetch setTimeout */
 
 import test from 'ava';
-import '@endo/init';
-import { execFileSync } from 'node:child_process';
+
+import { makeWalletUtils } from '@agoric/client-utils';
 import { GOV1ADDR, GOV2ADDR } from '@agoric/synthetic-chain';
-import { networkConfig } from './test-lib/index.js';
-import { getLastUpdate, makeWalletUtils } from './test-lib/wallet.js';
 import { makeGovernanceDriver } from './test-lib/governance.js';
+import { networkConfig } from './test-lib/index.js';
 import { makeTimerUtils } from './test-lib/utils.js';
 
 const GOV4ADDR = 'agoric1c9gyu460lu70rtcdp95vummd6032psmpdx7wdy';
 const governanceAddresses = [GOV4ADDR, GOV2ADDR, GOV1ADDR];
 
+// TODO test-lib export `walletUtils` with this ambient authority like s:stake-bld has
+/** @param {number} ms */
+const delay = ms =>
+  new Promise(resolve => setTimeout(() => resolve(undefined), ms));
+
 test.serial(
   'economic committee can make governance proposal and vote on it',
   async t => {
     const { waitUntil } = makeTimerUtils({ setTimeout });
-    const { readLatestHead } = await makeWalletUtils(
-      { setTimeout, execFileSync, fetch },
-      networkConfig,
-    );
+    const { readLatestHead, getLastUpdate, getCurrentWalletRecord } =
+      await makeWalletUtils({ delay, fetch }, networkConfig);
     const governanceDriver = await makeGovernanceDriver(fetch, networkConfig);
 
     /** @type {any} */
     const instance = await readLatestHead(`published.agoricNames.instance`);
     const instances = Object.fromEntries(instance);
 
-    /** @type {any} */
-    const wallet = await readLatestHead(
-      `published.wallet.${governanceAddresses[0]}.current`,
-    );
+    const wallet = await getCurrentWalletRecord(governanceAddresses[0]);
     const usedInvitations = wallet.offerToUsedInvitation;
 
     const charterInvitation = usedInvitations.find(
@@ -37,6 +36,7 @@ test.serial(
         v[1].value[0].instance.getBoardId() ===
         instances.econCommitteeCharter.getBoardId(),
     );
+    assert(charterInvitation, 'missing charter invitation');
 
     t.log('proposing on param change');
     const params = {
@@ -51,19 +51,17 @@ test.serial(
       charterInvitation[0],
     );
 
-    const questionUpdate = await getLastUpdate(governanceAddresses[0], {
-      readLatestHead,
-    });
+    const questionUpdate = await getLastUpdate(governanceAddresses[0]);
     t.like(questionUpdate, {
       status: { numWantsSatisfied: 1 },
     });
 
     t.log('Voting on param change');
     for (const address of governanceAddresses) {
-      /** @type {any} */
-      const voteWallet = await readLatestHead(
-        `published.wallet.${address}.current`,
-      );
+      const voteWallet =
+        /** @type {import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord} */ (
+          await readLatestHead(`published.wallet.${address}.current`)
+        );
 
       const usedInvitationsForVoter = voteWallet.offerToUsedInvitation;
 
@@ -72,21 +70,24 @@ test.serial(
           v[1].value[0].instance.getBoardId() ===
           instances.economicCommittee.getBoardId(),
       );
+      assert(committeeInvitationForVoter, 'missing committee invitation');
       await governanceDriver.voteOnProposedChanges(
         address,
         committeeInvitationForVoter[0],
       );
 
-      const voteUpdate = await getLastUpdate(address, { readLatestHead });
+      const voteUpdate = await getLastUpdate(address);
       t.like(voteUpdate, {
         status: { numWantsSatisfied: 1 },
       });
     }
 
-    /** @type {any} */
-    const latestQuestion = await readLatestHead(
-      'published.committees.Economic_Committee.latestQuestion',
-    );
+    const latestQuestion =
+      /** @type {import('@agoric/governance/src/types.js').QuestionSpec} */ (
+        await readLatestHead(
+          'published.committees.Economic_Committee.latestQuestion',
+        )
+      );
     await waitUntil(latestQuestion.closingRule.deadline);
 
     t.log('check if latest outcome is correct');
diff --git a/a3p-integration/proposals/z:acceptance/lib/vaults.mts b/a3p-integration/proposals/z:acceptance/lib/vaults.mts
index cec0cfcf062..f130f6d4be7 100644
--- a/a3p-integration/proposals/z:acceptance/lib/vaults.mts
+++ b/a3p-integration/proposals/z:acceptance/lib/vaults.mts
@@ -1,4 +1,3 @@
-/* eslint-disable @jessie.js/safe-await-separator */
 /* eslint-env node */
 
 import { strict as assert } from 'node:assert';
@@ -57,7 +56,13 @@ const voteForNewParams = (accounts: string[], position: number) => {
   console.log('ACTIONS voting for position', position, 'using', accounts);
   return Promise.all(
     accounts.map((account: string) =>
-      agops.ec('vote', '--forPosition', position, '--send-from', account),
+      agops.ec(
+        'vote',
+        '--forPosition',
+        String(position),
+        '--send-from',
+        account,
+      ),
     ),
   );
 };
diff --git a/a3p-integration/proposals/z:acceptance/localchain.test.js b/a3p-integration/proposals/z:acceptance/localchain.test.js
index 3b8cd9c7e86..340e84a5f99 100644
--- a/a3p-integration/proposals/z:acceptance/localchain.test.js
+++ b/a3p-integration/proposals/z:acceptance/localchain.test.js
@@ -1,11 +1,12 @@
 /* global setTimeout */
 
-import test from 'ava';
 import { agd, evalBundles } from '@agoric/synthetic-chain';
+import test from 'ava';
 import { retryUntilCondition } from './test-lib/sync-tools.js';
 
 const SUBMISSION_DIR = 'localchaintest-submission';
 
+/** @param {string} path */
 const readPublished = async path => {
   const { value } = await agd.query(
     'vstorage',
diff --git a/a3p-integration/proposals/z:acceptance/package.json b/a3p-integration/proposals/z:acceptance/package.json
index 4d66b29daa9..03282e517d3 100644
--- a/a3p-integration/proposals/z:acceptance/package.json
+++ b/a3p-integration/proposals/z:acceptance/package.json
@@ -10,7 +10,9 @@
   "type": "module",
   "license": "Apache-2.0",
   "dependencies": {
+    "@agoric/client-utils": "dev",
     "@agoric/ertp": "dev",
+    "@agoric/inter-protocol": "dev",
     "@agoric/internal": "dev",
     "@agoric/store": "dev",
     "@agoric/synthetic-chain": "^0.3.0",
@@ -25,9 +27,58 @@
   },
   "$comment": "UNTIL https://github.com/Agoric/agoric-sdk/issues/10259",
   "resolutions": {
-    "@agoric/xsnap": "beta"
+    "$commentXsnap": "UNTIL https://github.com/Agoric/agoric-sdk/issues/10259",
+    "@agoric/xsnap": "beta",
+    "@agoric/cosmos": "portal:../../agoric-sdk/golang/cosmos",
+    "@agoric/ertp": "portal:../../agoric-sdk/packages/ERTP",
+    "@agoric/swingset-vat": "portal:../../agoric-sdk/packages/SwingSet",
+    "@agoric/access-token": "portal:../../agoric-sdk/packages/access-token",
+    "agoric": "portal:../../agoric-sdk/packages/agoric-cli",
+    "@agoric/async-flow": "portal:../../agoric-sdk/packages/async-flow",
+    "@agoric/base-zone": "portal:../../agoric-sdk/packages/base-zone",
+    "@agoric/builders": "portal:../../agoric-sdk/packages/builders",
+    "@agoric/cache": "portal:../../agoric-sdk/packages/cache",
+    "@agoric/casting": "portal:../../agoric-sdk/packages/casting",
+    "@agoric/client-utils": "portal:../../agoric-sdk/packages/client-utils",
+    "@agoric/cosmic-proto": "portal:../../agoric-sdk/packages/cosmic-proto",
+    "@agoric/cosmic-swingset": "portal:../../agoric-sdk/packages/cosmic-swingset",
+    "@agoric/create-dapp": "portal:../../agoric-sdk/packages/create-dapp",
+    "@agoric/deploy-script-support": "portal:../../agoric-sdk/packages/deploy-script-support",
+    "@agoric/eslint-config": "portal:../../agoric-sdk/packages/eslint-config",
+    "@agoric/governance": "portal:../../agoric-sdk/packages/governance",
+    "@agoric/import-manager": "portal:../../agoric-sdk/packages/import-manager",
+    "@agoric/inter-protocol": "portal:../../agoric-sdk/packages/inter-protocol",
+    "@agoric/internal": "portal:../../agoric-sdk/packages/internal",
+    "@agoric/kmarshal": "portal:../../agoric-sdk/packages/kmarshal",
+    "@agoric/network": "portal:../../agoric-sdk/packages/network",
+    "@agoric/notifier": "portal:../../agoric-sdk/packages/notifier",
+    "@agoric/orchestration": "portal:../../agoric-sdk/packages/orchestration",
+    "@agoric/pegasus": "portal:../../agoric-sdk/packages/pegasus",
+    "@agoric/smart-wallet": "portal:../../agoric-sdk/packages/smart-wallet",
+    "@agoric/solo": "portal:../../agoric-sdk/packages/solo",
+    "@agoric/sparse-ints": "portal:../../agoric-sdk/packages/sparse-ints",
+    "@agoric/spawner": "portal:../../agoric-sdk/packages/spawner",
+    "@agoric/stat-logger": "portal:../../agoric-sdk/packages/stat-logger",
+    "@agoric/store": "portal:../../agoric-sdk/packages/store",
+    "@agoric/swing-store": "portal:../../agoric-sdk/packages/swing-store",
+    "@agoric/swingset-liveslots": "portal:../../agoric-sdk/packages/swingset-liveslots",
+    "@agoric/swingset-xsnap-supervisor": "portal:../../agoric-sdk/packages/swingset-xsnap-supervisor",
+    "@agoric/telemetry": "portal:../../agoric-sdk/packages/telemetry",
+    "@agoric/time": "portal:../../agoric-sdk/packages/time",
+    "@agoric/vat-data": "portal:../../agoric-sdk/packages/vat-data",
+    "@agoric/vats": "portal:../../agoric-sdk/packages/vats",
+    "@agoric/vm-config": "portal:../../agoric-sdk/packages/vm-config",
+    "@agoric/vow": "portal:../../agoric-sdk/packages/vow",
+    "@agoric/wallet": "portal:../../agoric-sdk/packages/wallet",
+    "@agoric/wallet-backend": "portal:../../agoric-sdk/packages/wallet/api",
+    "@agoric/xsnap-lockdown": "portal:../../agoric-sdk/packages/xsnap-lockdown",
+    "@agoric/zoe": "portal:../../agoric-sdk/packages/zoe",
+    "@agoric/zone": "portal:../../agoric-sdk/packages/zone"
   },
   "ava": {
+    "require": [
+      "@endo/init/legacy.js"
+    ],
     "concurrency": 1,
     "serial": true,
     "timeout": "2m",
@@ -38,7 +89,7 @@
   "scripts": {
     "agops": "yarn --cwd /usr/src/agoric-sdk/ --silent agops"
   },
-  "packageManager": "yarn@4.2.2",
+  "packageManager": "yarn@4.5.1",
   "devDependencies": {
     "typescript": "^5.5.4"
   }
diff --git a/a3p-integration/proposals/z:acceptance/psm.test.js b/a3p-integration/proposals/z:acceptance/psm.test.js
index bd64b3c5229..c902bce305e 100644
--- a/a3p-integration/proposals/z:acceptance/psm.test.js
+++ b/a3p-integration/proposals/z:acceptance/psm.test.js
@@ -12,7 +12,6 @@
  * 6 - Make sure mint limit is adhered
  */
 
-import test from 'ava';
 import {
   agd,
   agoric,
@@ -20,9 +19,11 @@ import {
   GOV1ADDR,
   GOV2ADDR,
 } from '@agoric/synthetic-chain';
+import { waitUntilAccountFunded } from '@agoric/client-utils';
+import test from 'ava';
+import { NonNullish } from './test-lib/errors.js';
 import {
   adjustBalancesIfNotProvisioned,
-  psmSwap,
   bankSend,
   checkGovParams,
   checkSwapExceedMintLimit,
@@ -31,10 +32,9 @@ import {
   implementPsmGovParamChange,
   initializeNewUser,
   maxMintBelowLimit,
+  psmSwap,
 } from './test-lib/psm-lib.js';
 import { getBalances } from './test-lib/utils.js';
-import { NonNullish } from './test-lib/errors.js';
-import { waitUntilAccountFunded } from './test-lib/sync-tools.js';
 
 // Export these from synthetic-chain?
 const USDC_DENOM = NonNullish(process.env.USDC_DENOM);
@@ -227,7 +227,7 @@ test.serial('mint limit is adhered', async t => {
   await bankSend(otherAddr, `${value}${denom}`);
   await waitUntilAccountFunded(
     otherAddr,
-    { query: agd.query, setTimeout },
+    { log: t.log, query: agd.query, setTimeout },
     { denom, value: parseInt(value, 10) },
     { errorMessage: `${otherAddr} could not be funded with ${value}${denom}` },
   );
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/governance.js b/a3p-integration/proposals/z:acceptance/test-lib/governance.js
index 910764d16c2..ce08264b870 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/governance.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/governance.js
@@ -1,21 +1,26 @@
 import { agops, agoric, executeOffer } from '@agoric/synthetic-chain';
-import { makeRpcUtils } from './rpc.js';
+import { makeVstorageKit } from '@agoric/client-utils';
 
+/**
+ * @param {typeof window.fetch} fetch
+ * @param {import('@agoric/client-utils').MinimalNetworkConfig} networkConfig
+ */
 export const makeGovernanceDriver = async (fetch, networkConfig) => {
-  const { readLatestHead, marshaller } = await makeRpcUtils(
+  const { readLatestHead, marshaller } = await makeVstorageKit(
     { fetch },
     networkConfig,
   );
 
+  /** @param {string} previousOfferId */
   const generateVoteOffer = async previousOfferId => {
     const id = `propose-${Date.now()}`;
 
-    /**
-     * @type {object}
-     */
-    const latestQuestionRecord = await readLatestHead(
-      'published.committees.Economic_Committee.latestQuestion',
-    );
+    const latestQuestionRecord =
+      /** @type {import('@agoric/governance/src/types.js').QuestionSpec} */ (
+        await readLatestHead(
+          'published.committees.Economic_Committee.latestQuestion',
+        )
+      );
 
     const chosenPositions = [latestQuestionRecord.positions[0]];
     const body = {
@@ -28,6 +33,7 @@ export const makeGovernanceDriver = async (fetch, networkConfig) => {
           source: 'continuing',
           invitationArgs: harden([
             chosenPositions,
+            // @ts-expect-error narrowing
             latestQuestionRecord.questionHandle,
           ]),
         },
@@ -39,7 +45,10 @@ export const makeGovernanceDriver = async (fetch, networkConfig) => {
     return JSON.stringify(capData);
   };
 
-  const voteOnProposedChanges = async (address, committeeAcceptOfferId) => {
+  const voteOnProposedChanges = async (
+    /** @type {string} */ address,
+    /** @type {string} */ committeeAcceptOfferId,
+  ) => {
     await null;
     const offerId =
       committeeAcceptOfferId ||
@@ -54,6 +63,18 @@ export const makeGovernanceDriver = async (fetch, networkConfig) => {
     return executeOffer(address, generateVoteOffer(offerId));
   };
 
+  /**
+   * Generates a vault director parameter change proposal as a `executeOffer` message
+   * body.
+   *
+   * @param {string} previousOfferId - the `id` of the offer that this proposal is
+   *   responding to
+   * @param {string | number | bigint | boolean} voteDur - how long the vote should
+   *   be open for (in seconds)
+   * @param {any} params
+   * @param {{ paramPath: any; }} paramsPath
+   * @returns {Promise<string>} - the `executeOffer` message body as a JSON string
+   */
   const generateVaultDirectorParamChange = async (
     previousOfferId,
     voteDur,
@@ -61,7 +82,7 @@ export const makeGovernanceDriver = async (fetch, networkConfig) => {
     paramsPath,
   ) => {
     const voteDurSec = BigInt(voteDur);
-    const toSec = ms => BigInt(Math.round(ms / 1000));
+    const toSec = (/** @type {number} */ ms) => BigInt(Math.round(ms / 1000));
 
     const id = `propose-${Date.now()}`;
     const deadline = toSec(Date.now()) + voteDurSec;
@@ -98,6 +119,13 @@ export const makeGovernanceDriver = async (fetch, networkConfig) => {
     return JSON.stringify(capData);
   };
 
+  /**
+   *
+   * @param {string} address
+   * @param {any} params
+   * @param {{paramPath: any}} path
+   * @param {string} charterAcceptOfferId
+   */
   const proposeVaultDirectorParamChange = async (
     address,
     params,
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/index.js b/a3p-integration/proposals/z:acceptance/test-lib/index.js
index 55bbfe8ff20..479d81503fc 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/index.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/index.js
@@ -1,4 +1,27 @@
+/* eslint-env node */
+import { makeWalletUtils } from '@agoric/client-utils';
+import { execFileSync } from 'child_process';
+import { makeAgdWalletUtils } from './wallet.js';
+
 export const networkConfig = {
   rpcAddrs: ['http://0.0.0.0:26657'],
   chainName: 'agoriclocal',
 };
+
+/**
+ * Resolve after a delay in milliseconds.
+ *
+ * @param {number} ms
+ * @returns {Promise<void>}
+ */
+const delay = ms => new Promise(resolve => setTimeout(() => resolve(), ms));
+
+export const walletUtils = await makeWalletUtils(
+  { delay, fetch },
+  networkConfig,
+);
+
+export const agdWalletUtils = await makeAgdWalletUtils(
+  { execFileSync, setTimeout, walletUtils },
+  networkConfig,
+);
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/kread.js b/a3p-integration/proposals/z:acceptance/test-lib/kread.js
index 83ecc0c3f77..01cd0d29b5f 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/kread.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/kread.js
@@ -1,5 +1,6 @@
-import assert from 'assert';
-import '@endo/init';
+// @ts-nocheck FIXME
+import assert from 'node:assert';
+
 import {
   agoric,
   executeOffer,
@@ -9,10 +10,11 @@ import {
 import { execFileSync } from 'child_process';
 import { makeCopyBag } from '@agoric/store';
 import { AmountMath } from '@agoric/ertp';
-import { makeFromBoard, boardSlottingMarshaller } from './rpc.js';
+import { boardSlottingMarshaller, makeFromBoard } from '@agoric/client-utils';
 
 const ISTunit = 1_000_000n;
 
+/** @type {(file: string, args: string[], opts: any) => string} */
 const showAndExec = (file, args, opts) => {
   console.log('$', file, ...args);
   return execFileSync(file, args, opts);
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/price-feed.js b/a3p-integration/proposals/z:acceptance/test-lib/price-feed.js
index 179cfa5c203..ea30984d5b5 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/price-feed.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/price-feed.js
@@ -1,12 +1,12 @@
 /* eslint-env node */
 
+import { retryUntilCondition } from '@agoric/client-utils';
 import {
   agoric,
   getContractInfo,
-  pushPrices,
   getPriceQuote,
+  pushPrices,
 } from '@agoric/synthetic-chain';
-import { retryUntilCondition } from './sync-tools.js';
 
 export const scale6 = x => BigInt(x * 1_000_000);
 
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/psm-lib.js b/a3p-integration/proposals/z:acceptance/test-lib/psm-lib.js
index be07700df72..b2a157691f5 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/psm-lib.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/psm-lib.js
@@ -1,35 +1,39 @@
 /* eslint-env node */
 
-import '@endo/init';
+import {
+  boardSlottingMarshaller,
+  makeFromBoard,
+  retryUntilCondition,
+  waitUntilAccountFunded,
+  waitUntilOfferResult,
+} from '@agoric/client-utils';
+import { AmountMath } from '@agoric/ertp';
 import {
   addUser,
   agd,
   agops,
+  agopsLocation,
   agoric,
+  CHAINID,
+  executeCommand,
   executeOffer,
   getUser,
-  agopsLocation,
-  executeCommand,
-  CHAINID,
-  VALIDATORADDR,
   GOV1ADDR,
   mkTemp,
+  VALIDATORADDR,
 } from '@agoric/synthetic-chain';
-import { AmountMath } from '@agoric/ertp';
 import fsp from 'node:fs/promises';
-import { boardSlottingMarshaller, makeFromBoard } from './rpc.js';
-import { getBalances } from './utils.js';
-import {
-  retryUntilCondition,
-  waitUntilAccountFunded,
-  waitUntilOfferResult,
-} from './sync-tools.js';
 import { NonNullish } from './errors.js';
+import { getBalances } from './utils.js';
 
 // Export these from synthetic-chain?
 const USDC_DENOM = NonNullish(process.env.USDC_DENOM);
 const PSM_PAIR = NonNullish(process.env.PSM_PAIR).replace('.', '-');
 
+/**
+ * @import {Coin} from '@agoric/cosmic-proto/cosmos/base/v1beta1/coin.js';
+ */
+
 /**
  * @typedef {object} PsmMetrics
  * @property {import('@agoric/ertp').Amount<'nat'>} anchorPoolBalance
@@ -37,8 +41,6 @@ const PSM_PAIR = NonNullish(process.env.PSM_PAIR).replace('.', '-');
  * @property {import('@agoric/ertp').Amount<'nat'>} mintedPoolBalance
  * @property {import('@agoric/ertp').Amount<'nat'>} totalAnchorProvided
  * @property {import('@agoric/ertp').Amount<'nat'>} totalMintedProvided
- *
- * @typedef {Array<{ denom: string; amount: string; }>} CosmosBalances
  */
 
 const fromBoard = makeFromBoard();
@@ -128,7 +130,7 @@ export const buildProposePSMParamChangeOffer = async ({
     params.MintLimit = AmountMath.make(brands.IST, newParams.mintLimit);
   }
 
-  const offerSpec = {
+  const offerSpec = /** @type {const} */ ({
     id: offerId,
     invitationSpec: {
       source: 'continuing',
@@ -141,14 +143,14 @@ export const buildProposePSMParamChangeOffer = async ({
       params,
       deadline,
     },
-  };
+  });
 
-  /** @type {string | object} */
   const spendAction = {
     method: 'executeOffer',
     offer: offerSpec,
   };
 
+  // @ts-expect-error XXX Passable
   const offer = JSON.stringify(marshaller.toCapData(harden(spendAction)));
   console.log(offerSpec);
   console.log(offer);
@@ -194,7 +196,10 @@ export const fetchLatestEcQuestion = async io => {
   return { latestOutcome, latestQuestion };
 };
 
-const checkCommitteeElectionResult = (electionResult, expectedResult) => {
+const checkCommitteeElectionResult = (
+  /** @type {{ latestOutcome: { outcome: any; question: any; }; latestQuestion: { closingRule: { deadline: any; }; questionHandle: any; }; }} */ electionResult,
+  /** @type {{ outcome: any; deadline: any; }} */ expectedResult,
+) => {
   const {
     latestOutcome: { outcome, question },
     latestQuestion: {
@@ -290,7 +295,11 @@ export const getPsmMetrics = async anchor => {
   return marshaller.fromCapData(JSON.parse(metricsRaw));
 };
 
-export const checkGovParams = async (t, expected, psmName) => {
+export const checkGovParams = async (
+  /** @type {import("ava").ExecutionContext<unknown>} */ t,
+  /** @type {any} */ expected,
+  /** @type {string} */ psmName,
+) => {
   const current = await getPsmGovernance(psmName);
 
   t.log({
@@ -327,7 +336,7 @@ export const checkUserInitializedSuccessfully = async (
  *   denom: string,
  *   value: string
  * }} fund
- * @param io
+ * @param {{query: () => Promise<object>, setTimeout: typeof setTimeout}} io
  */
 export const initializeNewUser = async (name, fund, io) => {
   const psmTrader = await addUser(name);
@@ -375,7 +384,7 @@ export const sendOfferAgoric = async (address, offerPromise) => {
  * @param {Array<any>} params
  * @param {{
  *   follow: (...params: string[]) => Promise<object>;
- *   setTimeout: (callback: Function, delay: number) => void;
+ *   setTimeout: typeof global.setTimeout;
  *   now: () => number
  * }} io
  */
@@ -407,7 +416,7 @@ const receiveAnchor = (base, fee) => Math.ceil(base * (1 - fee));
 
 /**
  *
- * @param {CosmosBalances} balances
+ * @param {Coin[]} balances
  * @param {string} targetDenom
  */
 const extractBalance = (balances, targetDenom) => {
@@ -445,7 +454,7 @@ export const tryISTBalances = async (t, actualBalance, expectedBalance) => {
  *
  * @param {import('ava').ExecutionContext} t
  * @param {PsmMetrics} metricsBefore
- * @param {CosmosBalances} balancesBefore
+ * @param {Coin[]} balancesBefore
  * @param {{trader: string; fee: number; anchor: string;} & (
  *   | {wantMinted: number}
  *   | {giveMinted: number}
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/rpc.js b/a3p-integration/proposals/z:acceptance/test-lib/rpc.js
index 5e047204151..907072d2376 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/rpc.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/rpc.js
@@ -234,7 +234,7 @@ export const makeAgoricNames = async (ctx, vstorage) => {
  * @param {{ fetch: typeof window.fetch }} io
  * @param {MinimalNetworkConfig} config
  */
-export const makeRpcUtils = async ({ fetch }, config = networkConfig) => {
+export const makeVstorageKit = async ({ fetch }, config = networkConfig) => {
   await null;
   try {
     const vstorage = makeVStorage({ fetch }, config);
@@ -263,4 +263,4 @@ export const makeRpcUtils = async ({ fetch }, config = networkConfig) => {
     throw Error(`RPC failure (${config.rpcAddrs}): ${err.message}`);
   }
 };
-/** @typedef {Awaited<ReturnType<typeof makeRpcUtils>>} RpcUtils */
+/** @typedef {Awaited<ReturnType<typeof makeVstorageKit>>} RpcUtils */
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/utils.js b/a3p-integration/proposals/z:acceptance/test-lib/utils.js
index 8c6300876ed..69b67992f7c 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/utils.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/utils.js
@@ -1,7 +1,15 @@
-import { makeAgd, agops, agoric } from '@agoric/synthetic-chain';
-import { execFileSync } from 'node:child_process';
+/* eslint-env node */
+import { makeStargateClient, makeVstorageKit } from '@agoric/client-utils';
 import { readFile, writeFile } from 'node:fs/promises';
-import { boardSlottingMarshaller, makeFromBoard } from './rpc.js';
+import { networkConfig } from './rpc.js';
+
+export const stargateClientP = makeStargateClient(networkConfig, { fetch });
+export const vstorageKitP = makeVstorageKit({ fetch }, networkConfig);
+
+/**
+ * @import {WalletUtils} from '@agoric/client-utils';
+ * @import {CurrentWalletRecord} from '@agoric/smart-wallet/src/smartWallet.js';
+ */
 
 /**
  * @param {string} fileName base file name without .tjs extension
@@ -15,24 +23,17 @@ export const replaceTemplateValuesInFile = async (fileName, replacements) => {
   await writeFile(`${fileName}.js`, script);
 };
 
-const showAndExec = (file, args, opts) => {
-  console.log('$', file, ...args);
-  return execFileSync(file, args, opts);
-};
-
-// @ts-expect-error string is not assignable to Buffer
-export const agd = makeAgd({ execFileSync: showAndExec }).withOpts({
-  keyringBackend: 'test',
-});
-
+// FIXME this return type depends on its arguments in surprising ways
 /**
  * @param {string[]} addresses
  * @param {string} [targetDenom]
+ * @returns {Promise<any>}
  */
 export const getBalances = async (addresses, targetDenom = undefined) => {
+  const client = await stargateClientP;
   const balancesList = await Promise.all(
     addresses.map(async address => {
-      const { balances } = await agd.query(['bank', 'balances', address]);
+      const balances = await client.getAllBalances(address);
 
       if (targetDenom) {
         const balance = balances.find(({ denom }) => denom === targetDenom);
@@ -46,8 +47,27 @@ export const getBalances = async (addresses, targetDenom = undefined) => {
   return addresses.length === 1 ? balancesList[0] : balancesList;
 };
 
-export const agopsVaults = addr => agops.vaults('list', '--from', addr);
+// TODO move this out of testing. To inter-protocol?
+// "vaults" is an Inter thing, but vstorage shape is a full chain (client) thing
+// Maybe a plugin architecture where the truth is in inter-protocol and the
+// client-lib rolls up the exports of many packages?
+/**
+ * @param {string} addr
+ * @param {WalletUtils} walletUtils
+ * @returns {Promise<string[]>}
+ */
+export const listVaults = async (addr, { getCurrentWalletRecord }) => {
+  const current = await getCurrentWalletRecord(addr);
+  const vaultStoragePaths = current.offerToPublicSubscriberPaths.map(
+    ([_offerId, pathmap]) => pathmap.vault,
+  );
 
+  return vaultStoragePaths;
+};
+
+/**
+ * @param {{setTimeout: typeof setTimeout}} io
+ */
 export const makeTimerUtils = ({ setTimeout }) => {
   /**
    * Resolve after a delay in milliseconds.
@@ -57,6 +77,7 @@ export const makeTimerUtils = ({ setTimeout }) => {
    */
   const delay = ms => new Promise(resolve => setTimeout(() => resolve(), ms));
 
+  /** @param {number} timestamp */
   const waitUntil = async timestamp => {
     const timeDelta = Math.floor(Date.now() / 1000) - Number(timestamp);
     await delay(timeDelta);
@@ -67,22 +88,3 @@ export const makeTimerUtils = ({ setTimeout }) => {
     waitUntil,
   };
 };
-
-const fromBoard = makeFromBoard();
-const marshaller = boardSlottingMarshaller(fromBoard.convertSlotToVal);
-
-export const getAgoricNamesBrands = async () => {
-  const brands = await agoric
-    .follow('-lF', ':published.agoricNames.brand', '-o', 'text')
-    .then(res => Object.fromEntries(marshaller.fromCapData(JSON.parse(res))));
-
-  return brands;
-};
-
-export const getAgoricNamesInstances = async () => {
-  const instances = await agoric
-    .follow('-lF', ':published.agoricNames.instance', '-o', 'text')
-    .then(res => Object.fromEntries(marshaller.fromCapData(JSON.parse(res))));
-
-  return instances;
-};
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/vaults.js b/a3p-integration/proposals/z:acceptance/test-lib/vaults.js
index 4ce0ff42716..af37b718b4a 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/vaults.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/vaults.js
@@ -1,6 +1,11 @@
 /* eslint-env node */
 
-import '@endo/init';
+import {
+  boardSlottingMarshaller,
+  makeFromBoard,
+  retryUntilCondition,
+} from '@agoric/client-utils';
+import { AmountMath } from '@agoric/ertp';
 import {
   agops,
   agoric,
@@ -9,14 +14,13 @@ import {
   GOV1ADDR,
   GOV2ADDR,
 } from '@agoric/synthetic-chain';
-import { AmountMath } from '@agoric/ertp';
 import {
   ceilMultiplyBy,
   makeRatio,
 } from '@agoric/zoe/src/contractSupport/ratio.js';
-import { getAgoricNamesBrands, getAgoricNamesInstances } from './utils.js';
-import { boardSlottingMarshaller, makeFromBoard } from './rpc.js';
-import { retryUntilCondition } from './sync-tools.js';
+import { E } from '@endo/far';
+import { walletUtils } from './index.js';
+import { listVaults, vstorageKitP } from './utils.js';
 
 const fromBoard = makeFromBoard();
 const marshaller = boardSlottingMarshaller(fromBoard.convertSlotToVal);
@@ -26,7 +30,7 @@ const marshaller = boardSlottingMarshaller(fromBoard.convertSlotToVal);
  * @returns {Promise<{ vaultID: string, debt: bigint, collateral: bigint, state: string }>}
  */
 export const getLastVaultFromAddress = async address => {
-  const activeVaults = await agops.vaults('list', '--from', address);
+  const activeVaults = await listVaults(address, walletUtils);
   const vaultPath = activeVaults[activeVaults.length - 1];
   const vaultID = vaultPath.split('.').pop();
 
@@ -93,7 +97,7 @@ export const getMinInitialDebt = async () => {
  * @returns {Promise<{ mintFee: import('@agoric/ertp/src/types.js').NatAmount, adjustedToMintAmount: import('@agoric/ertp/src/types.js').NatAmount }>}
  */
 export const calculateMintFee = async (toMintValue, vaultManager) => {
-  const brands = await getAgoricNamesBrands();
+  const { brand } = await E.get(vstorageKitP).agoricNames;
 
   const governancePath = `published.vaultFactory.managers.${vaultManager}.governance`;
   const governance = await getContractInfo(governancePath, {
@@ -106,27 +110,44 @@ export const calculateMintFee = async (toMintValue, vaultManager) => {
 
   const mintFeeRatio = makeRatio(
     numerator.value,
-    brands.IST,
+    brand.IST,
     denominator.value,
-    brands.IST,
+    brand.IST,
   );
 
-  const toMintAmount = AmountMath.make(brands.IST, toMintValue * 1_000_000n);
+  // @ts-expect-error XXX BoardRemote not Brand
+  const toMintAmount = AmountMath.make(brand.IST, toMintValue * 1_000_000n);
   const expectedMintFee = ceilMultiplyBy(toMintAmount, mintFeeRatio);
   const adjustedToMintAmount = AmountMath.add(toMintAmount, expectedMintFee);
 
   return { mintFee, adjustedToMintAmount };
 };
 
+/**
+ * @param {Array<string>} accounts
+ * @param {number} position
+ */
 const voteForNewParams = (accounts, position) => {
   console.log('ACTIONS voting for position', position, 'using', accounts);
   return Promise.all(
     accounts.map(account =>
-      agops.ec('vote', '--forPosition', position, '--send-from', account),
+      agops.ec(
+        'vote',
+        '--forPosition',
+        String(position),
+        '--send-from',
+        account,
+      ),
     ),
   );
 };
 
+/**
+ *
+ * @param {string} previousOfferId
+ * @param {number} voteDur
+ * @param {number} debtLimit
+ */
 const paramChangeOfferGeneration = async (
   previousOfferId,
   voteDur,
@@ -134,11 +155,11 @@ const paramChangeOfferGeneration = async (
 ) => {
   const ISTunit = 1_000_000n; // aka displayInfo: { decimalPlaces: 6 }
 
-  const brand = await getAgoricNamesBrands();
+  const { brand } = await E.get(vstorageKitP).agoricNames;
   assert(brand.IST);
   assert(brand.ATOM);
 
-  const instance = await getAgoricNamesInstances();
+  const { instance } = await E.get(vstorageKitP).agoricNames;
   assert(instance.VaultFactory);
 
   const voteDurSec = BigInt(voteDur);
@@ -181,6 +202,12 @@ const paramChangeOfferGeneration = async (
   return JSON.stringify(marshaller.toCapData(harden(body)));
 };
 
+/**
+ *
+ * @param {string} address
+ * @param {*} debtLimit
+ * @returns
+ */
 export const proposeNewDebtCeiling = async (address, debtLimit) => {
   const charterAcceptOfferId = await agops.ec(
     'find-continuing-id',
@@ -197,6 +224,12 @@ export const proposeNewDebtCeiling = async (address, debtLimit) => {
 };
 
 export const GOV4ADDR = 'agoric1c9gyu460lu70rtcdp95vummd6032psmpdx7wdy';
+
+/**
+ *
+ * @param {string} address
+ * @param {bigint} debtLimit
+ */
 export const setDebtLimit = async (address, debtLimit) => {
   const govAccounts = [GOV1ADDR, GOV2ADDR, GOV4ADDR];
 
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/wallet.js b/a3p-integration/proposals/z:acceptance/test-lib/wallet.js
index 366a988fc8f..04fcb8f9ccc 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/wallet.js
+++ b/a3p-integration/proposals/z:acceptance/test-lib/wallet.js
@@ -1,91 +1,11 @@
-/**
- * @file copied from packages/agoric-cli,
- * removing polling and coalescing features whose dependencies cause import problems here
- */
 // TODO DRY in https://github.com/Agoric/agoric-sdk/issues/9109
 // @ts-check
 /* global */
 
-import { E, Far } from '@endo/far';
 import { inspect } from 'util';
 import { execSwingsetTransaction, pollTx } from './chain.js';
-import { makeRpcUtils } from './rpc.js';
 import { makeTimerUtils } from './utils.js';
 
-/** @import {CurrentWalletRecord} from '@agoric/smart-wallet/src/smartWallet.js' */
-/** @import {AgoricNamesRemotes} from '@agoric/vats/tools/board-utils.js' */
-
-/**
- * @template T
- * @param follower
- * @param [options]
- */
-export const iterateReverse = (follower, options) =>
-  // For now, just pass through the iterable.
-  Far('iterateReverse iterable', {
-    /** @returns {AsyncIterator<T>} */
-    [Symbol.asyncIterator]: () => {
-      const eachIterable = E(follower).getReverseIterable(options);
-      const iterator = E(eachIterable)[Symbol.asyncIterator]();
-      return Far('iterateEach iterator', {
-        next: () => E(iterator).next(),
-      });
-    },
-  });
-
-/** @type {CurrentWalletRecord} */
-const emptyCurrentRecord = {
-  purses: [],
-  offerToUsedInvitation: [],
-  offerToPublicSubscriberPaths: [],
-  liveOffers: [],
-};
-
-/**
- * @param {string} addr
- * @param {Pick<import('./rpc.js').RpcUtils, 'readLatestHead'>} io
- * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord>}
- */
-export const getCurrent = async (addr, { readLatestHead }) => {
-  // Partial because older writes may not have had all properties
-  // NB: assumes changes are only additions
-  let current =
-    /** @type {Partial<import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord> | undefined} */ (
-      await readLatestHead(`published.wallet.${addr}.current`)
-    );
-  if (current === undefined) {
-    throw Error(`undefined current node for ${addr}`);
-  }
-
-  // Repair a type misunderstanding seen in the wild.
-  // See https://github.com/Agoric/agoric-sdk/pull/7139
-  let offerToUsedInvitation = current.offerToUsedInvitation;
-  if (
-    offerToUsedInvitation &&
-    typeof offerToUsedInvitation === 'object' &&
-    !Array.isArray(offerToUsedInvitation)
-  ) {
-    offerToUsedInvitation = Object.entries(offerToUsedInvitation);
-    current = harden({
-      ...current,
-      offerToUsedInvitation,
-    });
-  }
-
-  // override full empty record with defined values from published one
-  return { ...emptyCurrentRecord, ...current };
-};
-
-/**
- * @param {string} addr
- * @param {Pick<import('./rpc.js').RpcUtils, 'readLatestHead'>} io
- * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').UpdateRecord>}
- */
-export const getLastUpdate = (addr, { readLatestHead }) => {
-  // @ts-expect-error cast
-  return readLatestHead(`published.wallet.${addr}`);
-};
-
 /**
  * Sign and broadcast a wallet-action.
  *
@@ -93,7 +13,7 @@ export const getLastUpdate = (addr, { readLatestHead }) => {
  * @param {import('@agoric/smart-wallet/src/smartWallet.js').BridgeAction} bridgeAction
  * @param {import('./rpc.js').MinimalNetworkConfig & {
  *   from: string,
- *   marshaller: import('@endo/marshal').Marshal<'string'>,
+ *   marshaller: Pick<import('@endo/marshal').Marshal<string | null>, 'toCapData'>,
  *   fees?: string,
  *   verbose?: boolean,
  *   keyring?: {home?: string, backend: string},
@@ -132,12 +52,20 @@ export const sendAction = async (bridgeAction, opts) => {
   return pollTx(tx.txhash, opts);
 };
 
-export const makeWalletUtils = async (
-  { setTimeout, execFileSync, fetch },
+/**
+ * Stop-gap using execFileSync until we have a pure JS signing client.
+ *
+ * @param {object} root0
+ * @param {import('@agoric/client-utils').WalletUtils} root0.walletUtils
+ * @param {import('child_process')['execFileSync']} root0.execFileSync
+ * @param {typeof setTimeout} root0.setTimeout
+ * @param {import('@agoric/client-utils').MinimalNetworkConfig} networkConfig
+ */
+export const makeAgdWalletUtils = async (
+  { execFileSync, walletUtils, setTimeout },
   networkConfig,
 ) => {
-  const { agoricNames, fromBoard, marshaller, readLatestHead, vstorage } =
-    await makeRpcUtils({ fetch }, networkConfig);
+  const { marshaller } = walletUtils;
 
   const { delay } = await makeTimerUtils({ setTimeout });
   /**
@@ -158,11 +86,6 @@ export const makeWalletUtils = async (
   };
 
   return {
-    agoricNames,
     broadcastBridgeAction,
-    fromBoard,
-    networkConfig,
-    readLatestHead,
-    vstorage,
   };
 };
diff --git a/a3p-integration/proposals/z:acceptance/tsconfig.json b/a3p-integration/proposals/z:acceptance/tsconfig.json
index bd1c45190fe..dbebe7a229e 100644
--- a/a3p-integration/proposals/z:acceptance/tsconfig.json
+++ b/a3p-integration/proposals/z:acceptance/tsconfig.json
@@ -9,6 +9,7 @@
     "strict": false,
     "strictNullChecks": true,
     "noImplicitThis": true,
+    "noImplicitAny": true,
     // XXX synthetic-chain has some errors
     "skipLibCheck": true
   }
diff --git a/a3p-integration/proposals/z:acceptance/valueVow.test.js b/a3p-integration/proposals/z:acceptance/valueVow.test.js
index 81cbae6de82..738c8a30bae 100644
--- a/a3p-integration/proposals/z:acceptance/valueVow.test.js
+++ b/a3p-integration/proposals/z:acceptance/valueVow.test.js
@@ -1,36 +1,27 @@
-/* global fetch setTimeout */
-
 // @ts-check
+/* eslint-env node */
 import test from 'ava';
 import { inspect } from 'node:util';
-import { execFileSync } from 'node:child_process';
-import '@endo/init/debug.js';
 
+import { retryUntilCondition } from '@agoric/client-utils';
 import {
   evalBundles,
   getIncarnation,
   GOV1ADDR as GETTER, // not particular to governance, just a handy wallet
-  GOV2ADDR as SETTER, // not particular to governance, just a handy wallet
+  GOV2ADDR as SETTER,
 } from '@agoric/synthetic-chain';
-import { makeWalletUtils } from './test-lib/wallet.js';
-import { networkConfig } from './test-lib/index.js';
-import { retryUntilCondition } from './test-lib/sync-tools.js';
+import { agdWalletUtils, walletUtils } from './test-lib/index.js';
 
 const START_VALUEVOW_DIR = 'start-valueVow';
 const RESTART_VALUEVOW_DIR = 'restart-valueVow';
 
 test('vow survives restart', async t => {
-  const walletUtils = await makeWalletUtils(
-    { setTimeout, execFileSync, fetch },
-    networkConfig,
-  );
-
   t.log('start valueVow');
   await evalBundles(START_VALUEVOW_DIR);
   t.is(await getIncarnation('valueVow'), 0);
 
   t.log('use wallet to get a vow');
-  await walletUtils.broadcastBridgeAction(GETTER, {
+  await agdWalletUtils.broadcastBridgeAction(GETTER, {
     method: 'executeOffer',
     offer: {
       id: 'get-value',
@@ -48,7 +39,7 @@ test('vow survives restart', async t => {
     async () => walletUtils.readLatestHead(`published.wallet.${GETTER}`),
     value => value.status.id === 'get-value' && value.updated === 'offerStatus',
     'Offer get-value not succeeded',
-    { setTimeout, retryIntervalMs: 5000, maxRetries: 15 },
+    { log: t.log, setTimeout, retryIntervalMs: 5000, maxRetries: 15 },
   );
 
   console.log('current: ', inspect(getterStatus, { depth: 10 }));
@@ -67,7 +58,7 @@ test('vow survives restart', async t => {
   const offerArgs = { value: 'Ciao, mondo!' };
 
   t.log('use wallet to set value');
-  await walletUtils.broadcastBridgeAction(SETTER, {
+  await agdWalletUtils.broadcastBridgeAction(SETTER, {
     method: 'executeOffer',
     offer: {
       id: 'set-value',
diff --git a/a3p-integration/proposals/z:acceptance/vaults.test.js b/a3p-integration/proposals/z:acceptance/vaults.test.js
index a32e8e1115a..42d8a5b0157 100644
--- a/a3p-integration/proposals/z:acceptance/vaults.test.js
+++ b/a3p-integration/proposals/z:acceptance/vaults.test.js
@@ -1,21 +1,29 @@
+/* eslint-env node */
 import test from 'ava';
-import '@endo/init';
+
+import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import {
-  bankSend,
-  getUser,
-  openVault,
   adjustVault,
-  closeVault,
-  getISTBalance,
   ATOM_DENOM,
-  USER1ADDR,
-  GOV1ADDR,
+  bankSend,
+  closeVault,
   generateOracleMap,
+  getISTBalance,
   getPriceQuote,
+  getUser,
   getVaultPrices,
+  GOV1ADDR,
   GOV2ADDR,
+  openVault,
+  USER1ADDR,
 } from '@agoric/synthetic-chain';
-import { getBalances, agopsVaults } from './test-lib/utils.js';
+import { agdWalletUtils, walletUtils } from './test-lib/index.js';
+import {
+  getPriceFeedRoundId,
+  verifyPushedPrice,
+} from './test-lib/price-feed.js';
+import { bankSend as sendIST, tryISTBalances } from './test-lib/psm-lib.js';
+import { getBalances, listVaults } from './test-lib/utils.js';
 import {
   calculateMintFee,
   getAvailableDebtForMint,
@@ -23,28 +31,55 @@ import {
   getMinInitialDebt,
   setDebtLimit,
 } from './test-lib/vaults.js';
-import {
-  verifyPushedPrice,
-  getPriceFeedRoundId,
-} from './test-lib/price-feed.js';
-import { tryISTBalances, bankSend as sendIST } from './test-lib/psm-lib.js';
 
 const VAULT_MANAGER = 'manager0';
 
 const scale6 = x => x * 1_000_000;
 
+// TODO produce this dynamically from an Offers object exported from a package clientSupport
+const exec = {
+  vaults: {
+    // TODO decide how to handle defaults, whether CLI and this should have the same
+    /**
+     * @param {string} from
+     * @param {Parameters<typeof Offers.vaults.OpenVault>[1]['wantMinted']} wantMinted
+     * @param {Parameters<typeof Offers.vaults.OpenVault>[1]['giveCollateral']} giveCollateral
+     * @param {Parameters<typeof Offers.vaults.OpenVault>[1]['offerId']} offerId
+     * @param {Parameters<typeof Offers.vaults.OpenVault>[1]['collateralBrandKey']} collateralBrandKey
+     */
+    OpenVault: (
+      from,
+      wantMinted,
+      giveCollateral,
+      offerId = `openVault-${Date.now()}`,
+      collateralBrandKey = 'ATOM',
+    ) => {
+      const offer = Offers.vaults.OpenVault(walletUtils.agoricNames, {
+        giveCollateral,
+        wantMinted,
+        offerId,
+        collateralBrandKey,
+      });
+      return agdWalletUtils.broadcastBridgeAction(from, {
+        method: 'executeOffer',
+        offer,
+      });
+    },
+  },
+};
+
 test.serial('open new vault', async t => {
   await bankSend(USER1ADDR, `20000000${ATOM_DENOM}`);
 
   const istBalanceBefore = await getISTBalance(USER1ADDR);
-  const activeVaultsBefore = await agopsVaults(USER1ADDR);
+  const activeVaultsBefore = await listVaults(USER1ADDR, walletUtils);
 
-  const mint = '5.0';
-  const collateral = '10.0';
-  await openVault(USER1ADDR, mint, collateral);
+  const mint = 5.0;
+  const collateral = 10.0;
+  await exec.vaults.OpenVault(USER1ADDR, mint, collateral);
 
   const istBalanceAfter = await getISTBalance(USER1ADDR);
-  const activeVaultsAfter = await agopsVaults(USER1ADDR);
+  const activeVaultsAfter = await listVaults(USER1ADDR, walletUtils);
 
   await tryISTBalances(
     t,
@@ -142,7 +177,7 @@ test.serial(
   'user cannot open a vault under the minimum initial debt',
   async t => {
     await bankSend(GOV1ADDR, `200000000000000000${ATOM_DENOM}`);
-    const activeVaultsBefore = await agopsVaults(GOV1ADDR);
+    const activeVaultsBefore = await listVaults(GOV1ADDR, walletUtils);
 
     const minInitialDebt = await getMinInitialDebt();
 
@@ -156,7 +191,7 @@ test.serial(
       },
     );
 
-    const activeVaultsAfter = await agopsVaults(GOV1ADDR);
+    const activeVaultsAfter = await listVaults(GOV1ADDR, walletUtils);
 
     t.is(
       activeVaultsAfter.length,
@@ -167,7 +202,7 @@ test.serial(
 );
 
 test.serial('user cannot open a vault above debt limit', async t => {
-  const activeVaultsBefore = await agopsVaults(GOV1ADDR);
+  const activeVaultsBefore = await listVaults(GOV1ADDR, walletUtils);
 
   const { availableDebtForMint } = await getAvailableDebtForMint(VAULT_MANAGER);
 
@@ -181,7 +216,7 @@ test.serial('user cannot open a vault above debt limit', async t => {
     },
   );
 
-  const activeVaultsAfter = await agopsVaults(GOV1ADDR);
+  const activeVaultsAfter = await listVaults(GOV1ADDR, walletUtils);
 
   t.is(
     activeVaultsAfter.length,
@@ -192,7 +227,7 @@ test.serial('user cannot open a vault above debt limit', async t => {
 
 test.serial('user can open a vault under debt limit', async t => {
   const istBalanceBefore = await getISTBalance(GOV1ADDR);
-  const activeVaultsBefore = await agopsVaults(GOV1ADDR);
+  const activeVaultsBefore = await listVaults(GOV1ADDR, walletUtils);
 
   const { availableDebtForMint } = await getAvailableDebtForMint(VAULT_MANAGER);
 
@@ -202,7 +237,7 @@ test.serial('user can open a vault under debt limit', async t => {
   await openVault(GOV1ADDR, mint.toString(), collateral.toString());
 
   const istBalanceAfter = await getISTBalance(GOV1ADDR);
-  const activeVaultsAfter = await agopsVaults(GOV1ADDR);
+  const activeVaultsAfter = await listVaults(GOV1ADDR, walletUtils);
 
   t.is(
     istBalanceBefore + Number(mint),
diff --git a/a3p-integration/proposals/z:acceptance/wallet.test.js b/a3p-integration/proposals/z:acceptance/wallet.test.js
index 8d7375f385a..2ae1a0bd275 100644
--- a/a3p-integration/proposals/z:acceptance/wallet.test.js
+++ b/a3p-integration/proposals/z:acceptance/wallet.test.js
@@ -1,28 +1,29 @@
-/* global fetch setTimeout */
+/* eslint-env node */
 
 import test from 'ava';
-import '@endo/init';
+
+import { retryUntilCondition } from '@agoric/client-utils';
 import {
   agoric,
+  CHAINID,
   evalBundles,
   GOV1ADDR,
   GOV2ADDR,
-  CHAINID,
+  makeAgd,
 } from '@agoric/synthetic-chain';
-import { execFileSync } from 'child_process';
-import {
-  agd,
-  getBalances,
-  replaceTemplateValuesInFile,
-} from './test-lib/utils.js';
-import { retryUntilCondition } from './test-lib/sync-tools.js';
-import { makeWalletUtils } from './test-lib/wallet.js';
-import { networkConfig } from './test-lib/index.js';
-
-const walletUtils = await makeWalletUtils(
-  { setTimeout, execFileSync, fetch },
-  networkConfig,
-);
+import { execFileSync } from 'node:child_process';
+import { agdWalletUtils } from './test-lib/index.js';
+import { getBalances, replaceTemplateValuesInFile } from './test-lib/utils.js';
+
+const showAndExec = (file, args, opts) => {
+  console.log('$', file, ...args);
+  return execFileSync(file, args, opts);
+};
+
+// @ts-expect-error string is not assignable to Buffer
+const agd = makeAgd({ execFileSync: showAndExec }).withOpts({
+  keyringBackend: 'test',
+});
 
 test.serial(`send invitation via namesByAddress`, async t => {
   const SUBMISSION_DIR = 'invitation-test-submission';
@@ -55,7 +56,7 @@ test.serial('exitOffer tool reclaims stuck payment', async t => {
   const istBalanceBefore = await getBalances([GOV1ADDR], 'uist');
 
   const offerId = 'bad-invitation-15'; // offer submitted on proposal upgrade-15 with an incorrect method name
-  await walletUtils.broadcastBridgeAction(GOV1ADDR, {
+  await agdWalletUtils.broadcastBridgeAction(GOV1ADDR, {
     method: 'tryExitOffer',
     offerId,
   });
@@ -64,7 +65,7 @@ test.serial('exitOffer tool reclaims stuck payment', async t => {
     async () => getBalances([GOV1ADDR], 'uist'),
     istBalance => istBalance > istBalanceBefore,
     'tryExitOffer failed to reclaim stuck payment ',
-    { setTimeout, retryIntervalMs: 5000, maxRetries: 15 },
+    { log: t.log, setTimeout, retryIntervalMs: 5000, maxRetries: 15 },
   );
 
   t.true(
diff --git a/a3p-integration/proposals/z:acceptance/yarn.lock b/a3p-integration/proposals/z:acceptance/yarn.lock
index a1f4017c2ec..85e82e2435c 100644
--- a/a3p-integration/proposals/z:acceptance/yarn.lock
+++ b/a3p-integration/proposals/z:acceptance/yarn.lock
@@ -5,14 +5,7 @@ __metadata:
   version: 8
   cacheKey: 10c0
 
-"@agoric/assert@npm:^0.4.0":
-  version: 0.4.0
-  resolution: "@agoric/assert@npm:0.4.0"
-  checksum: 10c0/76f56924a891c5fcbeafce7545530c9e5bfe96dccd05b74dff3a3b9b31e30f60462791f5313afa3090e8966d679ed5628b9e8f50c48168ecfc8c36e8cf345161
-  languageName: node
-  linkType: hard
-
-"@agoric/babel-generator@npm:^7.17.4, @agoric/babel-generator@npm:^7.17.6":
+"@agoric/babel-generator@npm:^7.17.6":
   version: 7.17.6
   resolution: "@agoric/babel-generator@npm:7.17.6"
   dependencies:
@@ -23,44 +16,77 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@agoric/base-zone@npm:0.1.1-dev-44132c0.0+44132c0":
-  version: 0.1.1-dev-44132c0.0
-  resolution: "@agoric/base-zone@npm:0.1.1-dev-44132c0.0"
+"@agoric/base-zone@portal:../../agoric-sdk/packages/base-zone::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/base-zone@portal:../../agoric-sdk/packages/base-zone::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
-    "@agoric/store": "npm:0.9.3-dev-44132c0.0+44132c0"
+    "@agoric/store": "npm:^0.9.2"
     "@endo/common": "npm:^1.2.7"
     "@endo/errors": "npm:^1.2.7"
     "@endo/exo": "npm:^1.5.6"
     "@endo/far": "npm:^1.1.8"
     "@endo/pass-style": "npm:^1.4.6"
     "@endo/patterns": "npm:^1.4.6"
-  checksum: 10c0/66bffee9feb03f5c940b5072b0f291ea4daec8fbc7a20e688773a41d90a75e1c83a59e0b0947f6a14448c88aab83ee3054db432903cf7c05168b6f76e0424fef
   languageName: node
-  linkType: hard
+  linkType: soft
 
-"@agoric/base-zone@npm:0.1.1-dev-d7c994b.0+d7c994b":
-  version: 0.1.1-dev-d7c994b.0
-  resolution: "@agoric/base-zone@npm:0.1.1-dev-d7c994b.0"
-  dependencies:
-    "@agoric/store": "npm:0.9.3-dev-d7c994b.0+d7c994b"
-    "@endo/common": "npm:^1.2.7"
+"@agoric/casting@portal:../../agoric-sdk/packages/casting::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/casting@portal:../../agoric-sdk/packages/casting::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/notifier": "npm:^0.6.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@cosmjs/encoding": "npm:^0.32.3"
+    "@cosmjs/proto-signing": "npm:^0.32.3"
+    "@cosmjs/stargate": "npm:^0.32.3"
+    "@cosmjs/tendermint-rpc": "npm:^0.32.3"
     "@endo/errors": "npm:^1.2.7"
-    "@endo/exo": "npm:^1.5.6"
     "@endo/far": "npm:^1.1.8"
+    "@endo/init": "npm:^1.1.6"
+    "@endo/lockdown": "npm:^1.0.12"
+    "@endo/marshal": "npm:^1.6.1"
+    "@endo/promise-kit": "npm:^1.1.7"
+  languageName: node
+  linkType: soft
+
+"@agoric/client-utils@portal:../../agoric-sdk/packages/client-utils::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/client-utils@portal:../../agoric-sdk/packages/client-utils::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
+    "@agoric/casting": "npm:^0.4.2"
+    "@agoric/ertp": "npm:^0.16.2"
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/smart-wallet": "npm:^0.5.3"
+    "@agoric/vats": "npm:^0.15.1"
+    "@cosmjs/stargate": "npm:^0.32.3"
+    "@cosmjs/tendermint-rpc": "npm:^0.32.3"
+    "@endo/common": "npm:^1.2.7"
+    "@endo/errors": "npm:^1.2.7"
+    "@endo/marshal": "npm:^1.6.1"
     "@endo/pass-style": "npm:^1.4.6"
     "@endo/patterns": "npm:^1.4.6"
-  checksum: 10c0/c739aaba377d0f9409561ece7f9ed94ef3cdad7ddbbf56609bc50ea9fe71446fccbd92bb5a4dcb11a40872fdf862b5a7836b8140b5639ca501717b569249a344
+    "@endo/promise-kit": "npm:^1.1.7"
   languageName: node
-  linkType: hard
+  linkType: soft
 
-"@agoric/ertp@npm:0.16.3-dev-44132c0.0+44132c0":
-  version: 0.16.3-dev-44132c0.0
-  resolution: "@agoric/ertp@npm:0.16.3-dev-44132c0.0"
+"@agoric/cosmic-proto@portal:../../agoric-sdk/packages/cosmic-proto::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/cosmic-proto@portal:../../agoric-sdk/packages/cosmic-proto::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
-    "@agoric/notifier": "npm:0.6.3-dev-44132c0.0+44132c0"
-    "@agoric/store": "npm:0.9.3-dev-44132c0.0+44132c0"
-    "@agoric/vat-data": "npm:0.5.3-dev-44132c0.0+44132c0"
-    "@agoric/zone": "npm:0.2.3-dev-44132c0.0+44132c0"
+    "@endo/base64": "npm:^1.0.8"
+    "@endo/init": "npm:^1.1.6"
+  languageName: node
+  linkType: soft
+
+"@agoric/ertp@portal:../../agoric-sdk/packages/ERTP::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/ertp@portal:../../agoric-sdk/packages/ERTP::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
+    "@agoric/notifier": "npm:^0.6.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/vat-data": "npm:^0.5.2"
+    "@agoric/zone": "npm:^0.2.2"
     "@endo/errors": "npm:^1.2.7"
     "@endo/eventual-send": "npm:^1.2.7"
     "@endo/far": "npm:^1.1.8"
@@ -68,54 +94,61 @@ __metadata:
     "@endo/nat": "npm:^5.0.12"
     "@endo/patterns": "npm:^1.4.6"
     "@endo/promise-kit": "npm:^1.1.7"
-  checksum: 10c0/ff8232603cb00861869f8708aed26d7c9437f616c6d86ee6163af4819f8220ef5d280f8bdce1ea51818326faabc71a2513b4f3f82688e7454d1ff51c57e95dcd
   languageName: node
-  linkType: hard
+  linkType: soft
 
-"@agoric/ertp@npm:dev":
-  version: 0.16.3-dev-d7c994b.0
-  resolution: "@agoric/ertp@npm:0.16.3-dev-d7c994b.0"
-  dependencies:
-    "@agoric/notifier": "npm:0.6.3-dev-d7c994b.0+d7c994b"
-    "@agoric/store": "npm:0.9.3-dev-d7c994b.0+d7c994b"
-    "@agoric/vat-data": "npm:0.5.3-dev-d7c994b.0+d7c994b"
-    "@agoric/zone": "npm:0.2.3-dev-d7c994b.0+d7c994b"
+"@agoric/governance@portal:../../agoric-sdk/packages/governance::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/governance@portal:../../agoric-sdk/packages/governance::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
+    "@agoric/ertp": "npm:^0.16.2"
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/notifier": "npm:^0.6.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/time": "npm:^0.3.2"
+    "@agoric/vat-data": "npm:^0.5.2"
+    "@agoric/zoe": "npm:^0.26.2"
+    "@endo/bundle-source": "npm:^3.4.2"
+    "@endo/captp": "npm:^4.4.2"
     "@endo/errors": "npm:^1.2.7"
     "@endo/eventual-send": "npm:^1.2.7"
     "@endo/far": "npm:^1.1.8"
     "@endo/marshal": "npm:^1.6.1"
     "@endo/nat": "npm:^5.0.12"
-    "@endo/patterns": "npm:^1.4.6"
     "@endo/promise-kit": "npm:^1.1.7"
-  checksum: 10c0/050e7755fcabb1fb624b58742f02571a7b459361ef13f508002c5c64993c22200faf66df8e931caf293e35290ce42bffef3e912839d05a18d26224263e039cf3
+    import-meta-resolve: "npm:^2.2.1"
   languageName: node
-  linkType: hard
+  linkType: soft
 
-"@agoric/internal@npm:0.3.3-dev-44132c0.0+44132c0":
-  version: 0.3.3-dev-44132c0.0
-  resolution: "@agoric/internal@npm:0.3.3-dev-44132c0.0"
-  dependencies:
-    "@agoric/base-zone": "npm:0.1.1-dev-44132c0.0+44132c0"
-    "@endo/common": "npm:^1.2.7"
+"@agoric/inter-protocol@portal:../../agoric-sdk/packages/inter-protocol::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/inter-protocol@portal:../../agoric-sdk/packages/inter-protocol::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
+    "@agoric/ertp": "npm:^0.16.2"
+    "@agoric/governance": "npm:^0.10.3"
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/notifier": "npm:^0.6.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/time": "npm:^0.3.2"
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+    "@agoric/vats": "npm:^0.15.1"
+    "@agoric/zoe": "npm:^0.26.2"
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-    "@endo/patterns": "npm:^1.4.6"
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-  resolution: "@agoric/internal@npm:0.3.3-dev-d7c994b.0"
+"@agoric/internal@portal:../../agoric-sdk/packages/internal::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/internal@portal:../../agoric-sdk/packages/internal::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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+    "@agoric/base-zone": "npm:^0.1.0"
     "@endo/common": "npm:^1.2.7"
     "@endo/errors": "npm:^1.2.7"
     "@endo/far": "npm:^1.1.8"
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     anylogger: "npm:^0.21.0"
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-  resolution: "@agoric/kmarshal@npm:0.1.1-dev-44132c0.0"
+"@agoric/kmarshal@portal:../../agoric-sdk/packages/kmarshal::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/kmarshal@portal:../../agoric-sdk/packages/kmarshal::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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-  resolution: "@agoric/notifier@npm:0.6.3-dev-44132c0.0"
+"@agoric/network@portal:../../agoric-sdk/packages/network::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/network@portal:../../agoric-sdk/packages/network::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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-    "@agoric/vat-data": "npm:0.5.3-dev-44132c0.0+44132c0"
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/vat-data": "npm:^0.5.2"
+    "@endo/base64": "npm:^1.0.8"
     "@endo/errors": "npm:^1.2.7"
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-    "@endo/marshal": "npm:^1.6.1"
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-  resolution: "@agoric/notifier@npm:0.6.3-dev-d7c994b.0"
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+  version: 0.0.0-use.local
+  resolution: "@agoric/notifier@portal:../../agoric-sdk/packages/notifier::locator=root-workspace-0b6124%40workspace%3A."
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-    "@agoric/vat-data": "npm:0.5.3-dev-d7c994b.0+d7c994b"
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-  resolution: "@agoric/store@npm:0.9.3-dev-44132c0.0"
-  dependencies:
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+  version: 0.0.0-use.local
+  resolution: "@agoric/smart-wallet@portal:../../agoric-sdk/packages/smart-wallet::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
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+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/notifier": "npm:^0.6.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/vat-data": "npm:^0.5.2"
+    "@agoric/vats": "npm:^0.15.1"
+    "@agoric/vow": "npm:^0.1.0"
+    "@agoric/zoe": "npm:^0.26.2"
+    "@agoric/zone": "npm:^0.2.2"
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+    "@endo/eventual-send": "npm:^1.2.7"
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+"@agoric/store@portal:../../agoric-sdk/packages/store::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/store@portal:../../agoric-sdk/packages/store::locator=root-workspace-0b6124%40workspace%3A."
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-  resolution: "@agoric/swing-store@npm:0.9.2-dev-44132c0.0"
+"@agoric/swing-store@portal:../../agoric-sdk/packages/swing-store::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/swing-store@portal:../../agoric-sdk/packages/swing-store::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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+    "@agoric/internal": "npm:^0.3.2"
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-  resolution: "@agoric/swingset-liveslots@npm:0.10.3-dev-44132c0.0"
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-    "@agoric/store": "npm:0.9.3-dev-44132c0.0+44132c0"
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   languageName: node
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-  version: 0.10.3-dev-d7c994b.0
-  resolution: "@agoric/swingset-liveslots@npm:0.10.3-dev-d7c994b.0"
+"@agoric/swingset-liveslots@portal:../../agoric-sdk/packages/swingset-liveslots::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/swingset-liveslots@portal:../../agoric-sdk/packages/swingset-liveslots::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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-    "@agoric/store": "npm:0.9.3-dev-d7c994b.0+d7c994b"
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/store": "npm:^0.9.2"
     "@endo/env-options": "npm:^1.1.7"
     "@endo/errors": "npm:^1.2.7"
     "@endo/eventual-send": "npm:^1.2.7"
@@ -251,24 +268,22 @@ __metadata:
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     "@endo/promise-kit": "npm:^1.1.7"
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   languageName: node
-  linkType: hard
+  linkType: soft
 
-"@agoric/swingset-vat@npm:0.32.3-dev-44132c0.0+44132c0":
-  version: 0.32.3-dev-44132c0.0
-  resolution: "@agoric/swingset-vat@npm:0.32.3-dev-44132c0.0"
-  dependencies:
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-    "@agoric/kmarshal": "npm:0.1.1-dev-44132c0.0+44132c0"
-    "@agoric/store": "npm:0.9.3-dev-44132c0.0+44132c0"
-    "@agoric/swing-store": "npm:0.9.2-dev-44132c0.0+44132c0"
-    "@agoric/swingset-liveslots": "npm:0.10.3-dev-44132c0.0+44132c0"
-    "@agoric/swingset-xsnap-supervisor": "npm:0.10.3-dev-44132c0.0+44132c0"
-    "@agoric/time": "npm:0.3.3-dev-44132c0.0+44132c0"
-    "@agoric/vat-data": "npm:0.5.3-dev-44132c0.0+44132c0"
-    "@agoric/xsnap": "npm:0.14.3-dev-44132c0.0+44132c0"
-    "@agoric/xsnap-lockdown": "npm:0.14.1-dev-44132c0.0+44132c0"
+"@agoric/swingset-vat@portal:../../agoric-sdk/packages/SwingSet::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/swingset-vat@portal:../../agoric-sdk/packages/SwingSet::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
+    "@agoric/internal": "npm:^0.3.2"
+    "@agoric/kmarshal": "npm:^0.1.0"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/swing-store": "npm:^0.9.1"
+    "@agoric/swingset-liveslots": "npm:^0.10.2"
+    "@agoric/swingset-xsnap-supervisor": "npm:^0.10.2"
+    "@agoric/time": "npm:^0.3.2"
+    "@agoric/vat-data": "npm:^0.5.2"
+    "@agoric/xsnap-lockdown": "npm:^0.14.0"
     "@endo/base64": "npm:^1.0.8"
     "@endo/bundle-source": "npm:^3.4.2"
     "@endo/captp": "npm:^4.4.2"
@@ -296,19 +311,18 @@ __metadata:
     tmp: "npm:^0.2.1"
     yargs-parser: "npm:^21.1.1"
   peerDependencies:
+    "@agoric/xsnap": ^0.14.2
     ava: ^5.3.0
   bin:
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-  checksum: 10c0/c51d74501e42d99b9f5bd60ee6e1a8edcd0db0821f82dbfd85876f76bfc740ede9493dbcde3cf2cef2479f47319db45e7f93fb22b513c60ed01af52a94187b63
   languageName: node
-  linkType: hard
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-"@agoric/swingset-xsnap-supervisor@npm:0.10.3-dev-44132c0.0+44132c0":
-  version: 0.10.3-dev-44132c0.0
-  resolution: "@agoric/swingset-xsnap-supervisor@npm:0.10.3-dev-44132c0.0"
-  checksum: 10c0/aa0dfe53beaa8c5b1d2dac1dac0e8b8e7085f15c67de7577fb1af14728625fc4a92ff6a303f0901fc50db302eb87af2fa70868dd865a5c014f3f8a3f3410c634
+"@agoric/swingset-xsnap-supervisor@portal:../../agoric-sdk/packages/swingset-xsnap-supervisor::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/swingset-xsnap-supervisor@portal:../../agoric-sdk/packages/swingset-xsnap-supervisor::locator=root-workspace-0b6124%40workspace%3A."
   languageName: node
-  linkType: hard
+  linkType: soft
 
 "@agoric/synthetic-chain@npm:^0.3.0":
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-  resolution: "@agoric/time@npm:0.3.3-dev-44132c0.0"
+"@agoric/time@portal:../../agoric-sdk/packages/time::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/time@portal:../../agoric-sdk/packages/time::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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+    "@agoric/store": "npm:^0.9.2"
     "@endo/errors": "npm:^1.2.7"
     "@endo/nat": "npm:^5.0.12"
     "@endo/patterns": "npm:^1.4.6"
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-  version: 0.5.3-dev-44132c0.0
-  resolution: "@agoric/vat-data@npm:0.5.3-dev-44132c0.0"
+"@agoric/vat-data@portal:../../agoric-sdk/packages/vat-data::locator=root-workspace-0b6124%40workspace%3A.":
+  version: 0.0.0-use.local
+  resolution: "@agoric/vat-data@portal:../../agoric-sdk/packages/vat-data::locator=root-workspace-0b6124%40workspace%3A."
   dependencies:
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-    "@agoric/swingset-liveslots": "npm:0.10.3-dev-44132c0.0+44132c0"
+    "@agoric/base-zone": "npm:^0.1.0"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/swingset-liveslots": "npm:^0.10.2"
     "@endo/errors": "npm:^1.2.7"
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-  resolution: "@agoric/vat-data@npm:0.5.3-dev-d7c994b.0"
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+"@agoric/vats@portal:../../agoric-sdk/packages/vats::locator=root-workspace-0b6124%40workspace%3A.":
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+  resolution: "@agoric/vats@portal:../../agoric-sdk/packages/vats::locator=root-workspace-0b6124%40workspace%3A."
+  dependencies:
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+    "@agoric/network": "npm:^0.1.0"
+    "@agoric/notifier": "npm:^0.6.2"
+    "@agoric/store": "npm:^0.9.2"
+    "@agoric/swingset-vat": "npm:^0.32.2"
+    "@agoric/time": "npm:^0.3.2"
+    "@agoric/vat-data": "npm:^0.5.2"
+    "@agoric/vow": "npm:^0.1.0"
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+  resolution: "get-intrinsic@npm:1.2.4"
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+    function-bind: "npm:^1.1.2"
+    has-proto: "npm:^1.0.1"
+    has-symbols: "npm:^1.0.3"
+    hasown: "npm:^2.0.0"
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+  resolution: "globalthis@npm:1.0.4"
+  dependencies:
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+  languageName: node
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+  resolution: "gopd@npm:1.0.1"
+  dependencies:
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+  resolution: "has-property-descriptors@npm:1.0.2"
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+  languageName: node
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+  languageName: node
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+  version: 1.1.7
+  resolution: "hash.js@npm:1.1.7"
+  dependencies:
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+    minimalistic-assert: "npm:^1.0.1"
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+  languageName: node
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+  resolution: "hmac-drbg@npm:1.0.1"
+  dependencies:
+    hash.js: "npm:^1.0.3"
+    minimalistic-assert: "npm:^1.0.0"
+    minimalistic-crypto-utils: "npm:^1.0.1"
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+  languageName: node
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+  version: 4.0.1
+  resolution: "isomorphic-ws@npm:4.0.1"
+  peerDependencies:
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+  checksum: 10c0/7cb90dc2f0eb409825558982fb15d7c1d757a88595efbab879592f9d2b63820d6bbfb5571ab8abe36c715946e165a413a99f6aafd9f40ab1f514d73487bc9996
+  languageName: node
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+  version: 0.7.15
+  resolution: "libsodium-sumo@npm:0.7.15"
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+  languageName: node
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+  resolution: "libsodium-wrappers-sumo@npm:0.7.15"
+  dependencies:
+    libsodium-sumo: "npm:^0.7.15"
+  checksum: 10c0/6da919a13395346d54f2ce4841adda8feb3fbb8a8c378ec5c93b7e6dc6353b379289349e659f3e017a9f1995ef396bf43f89c7ab4aab4e3b5ed85df62407d810
+  languageName: node
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+  version: 4.0.0
+  resolution: "long@npm:4.0.0"
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+  languageName: node
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+
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   resolution: "lru-cache@npm:10.4.3"
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+  resolution: "mime-db@npm:1.52.0"
+  checksum: 10c0/0557a01deebf45ac5f5777fe7740b2a5c309c6d62d40ceab4e23da9f821899ce7a900b7ac8157d4548ddbb7beffe9abc621250e6d182b0397ec7f10c7b91a5aa
+  languageName: node
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+  resolution: "mime-types@npm:2.1.35"
+  dependencies:
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+  languageName: node
+  linkType: hard
+
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   resolution: "mimic-function@npm:5.0.1"
@@ -3060,6 +3373,20 @@ __metadata:
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+  resolution: "minimalistic-assert@npm:1.0.1"
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+  languageName: node
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+  resolution: "minimalistic-crypto-utils@npm:1.0.1"
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+  languageName: node
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+  resolution: "object-keys@npm:1.1.1"
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+  languageName: node
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   resolution: "once@npm:1.4.0"
@@ -3499,6 +3833,37 @@ __metadata:
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+  resolution: "protobufjs@npm:6.11.4"
+  dependencies:
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+    "@protobufjs/base64": "npm:^1.1.2"
+    "@protobufjs/codegen": "npm:^2.0.4"
+    "@protobufjs/eventemitter": "npm:^1.1.0"
+    "@protobufjs/fetch": "npm:^1.1.0"
+    "@protobufjs/float": "npm:^1.0.2"
+    "@protobufjs/inquire": "npm:^1.1.0"
+    "@protobufjs/path": "npm:^1.1.2"
+    "@protobufjs/pool": "npm:^1.1.0"
+    "@protobufjs/utf8": "npm:^1.1.0"
+    "@types/long": "npm:^4.0.1"
+    "@types/node": "npm:>=13.7.0"
+    long: "npm:^4.0.0"
+  bin:
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+    pbts: bin/pbts
+  checksum: 10c0/c244d7b9b6d3258193da5c0d1e558dfb47f208ae345e209f90ec45c9dca911b90fa17e937892a9a39a4136ab9886981aae9efdf6039f7baff4f7225f5eeb9812
+  languageName: node
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+  resolution: "proxy-from-env@npm:1.1.0"
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+  languageName: node
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+
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   resolution: "pump@npm:3.0.2"
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+  resolution: "readonly-date@npm:1.0.0"
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+  languageName: node
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+
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   resolution: "require-directory@npm:2.1.1"
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-  resolution: "rollup-plugin-string@npm:3.0.0"
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-  languageName: node
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-  resolution: "rollup-pluginutils@npm:2.8.2"
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-  languageName: node
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@@ -3665,7 +4019,9 @@ __metadata:
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   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
+    "@agoric/client-utils": "npm:dev"
     "@agoric/ertp": "npm:dev"
+    "@agoric/inter-protocol": "npm:dev"
     "@agoric/internal": "npm:dev"
     "@agoric/store": "npm:dev"
     "@agoric/synthetic-chain": "npm:^0.3.0"
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-  resolution: "ses@npm:0.18.8"
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-  languageName: node
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@@ -4002,6 +4342,13 @@ __metadata:
   languageName: node
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+"symbol-observable@npm:^2.0.3":
+  version: 2.0.3
+  resolution: "symbol-observable@npm:2.0.3"
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+  languageName: node
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+
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   resolution: "tar-fs@npm:2.1.1"
@@ -4122,11 +4469,11 @@ __metadata:
 
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-  resolution: "typescript@patch:typescript@npm%3A5.6.3#optional!builtin<compat/typescript>::version=5.6.3&hash=b45daf"
+  resolution: "typescript@patch:typescript@npm%3A5.6.3#optional!builtin<compat/typescript>::version=5.6.3&hash=8c6c40"
   bin:
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@@ -4270,6 +4617,31 @@ __metadata:
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+  resolution: "ws@npm:7.5.10"
+  peerDependencies:
+    bufferutil: ^4.0.1
+    utf-8-validate: ^5.0.2
+  peerDependenciesMeta:
+    bufferutil:
+      optional: true
+    utf-8-validate:
+      optional: true
+  checksum: 10c0/bd7d5f4aaf04fae7960c23dcb6c6375d525e00f795dd20b9385902bd008c40a94d3db3ce97d878acc7573df852056ca546328b27b39f47609f80fb22a0a9b61d
+  languageName: node
+  linkType: hard
+
+"xstream@npm:^11.14.0":
+  version: 11.14.0
+  resolution: "xstream@npm:11.14.0"
+  dependencies:
+    globalthis: "npm:^1.0.1"
+    symbol-observable: "npm:^2.0.3"
+  checksum: 10c0/7a28baedc64385dc17597d04c7130ec3135db298e66d6dcf33821eb1953d5ad1b83c5fa08f1ce4d36e75fd219f2e9ef81ee0721aa8d4ccf619acc1760ba37f71
+  languageName: node
+  linkType: hard
+
 "y18n@npm:^5.0.5":
   version: 5.0.8
   resolution: "y18n@npm:5.0.8"
diff --git a/packages/agoric-cli/src/commands/auction.js b/packages/agoric-cli/src/commands/auction.js
index 241b49ec28c..5a6ba79e84b 100644
--- a/packages/agoric-cli/src/commands/auction.js
+++ b/packages/agoric-cli/src/commands/auction.js
@@ -2,7 +2,7 @@
 /* eslint-env node */
 import { InvalidArgumentError } from 'commander';
 import { Fail } from '@endo/errors';
-import { makeRpcUtils } from '@agoric/client-utils';
+import { makeVstorageKit } from '@agoric/client-utils';
 import { outputActionAndHint } from '../lib/wallet.js';
 import { getNetworkConfig } from '../lib/network-config.js';
 
@@ -89,7 +89,7 @@ export const makeAuctionCommand = (
        * }} opts
        */
       async opts => {
-        const { agoricNames, readLatestHead } = await makeRpcUtils(
+        const { agoricNames, readLatestHead } = await makeVstorageKit(
           { fetch },
           networkConfig,
         );
diff --git a/packages/agoric-cli/src/commands/gov.js b/packages/agoric-cli/src/commands/gov.js
index fd0efc504ef..26c8a280a25 100644
--- a/packages/agoric-cli/src/commands/gov.js
+++ b/packages/agoric-cli/src/commands/gov.js
@@ -1,7 +1,7 @@
 // @ts-check
 /* eslint-disable func-names */
 /* eslint-env node */
-import { makeRpcUtils } from '@agoric/client-utils';
+import { makeVstorageKit } from '@agoric/client-utils';
 import { execFileSync as execFileSyncAmbient } from 'child_process';
 import { Command, CommanderError } from 'commander';
 import { normalizeAddressWithOptions, pollBlocks } from '../lib/chain.js';
@@ -91,13 +91,13 @@ export const makeGovCommand = (_logger, io = {}) => {
    *   keyringBackend: string,
    *   instanceName?: string,
    * }} detail
-   * @param {Awaited<ReturnType<makeRpcUtils>>} [optUtils]
+   * @param {Awaited<ReturnType<makeVstorageKit>>} [optUtils]
    */
   const processOffer = async function (
     { toOffer, sendFrom, keyringBackend },
     optUtils,
   ) {
-    const utils = await (optUtils || makeRpcUtils({ fetch }, networkConfig));
+    const utils = await (optUtils || makeVstorageKit({ fetch }, networkConfig));
     const { agoricNames, readLatestHead } = utils;
 
     assert(keyringBackend, 'missing keyring-backend option');
@@ -265,7 +265,7 @@ export const makeGovCommand = (_logger, io = {}) => {
     )
     .requiredOption('--for <string>', 'description of the invitation')
     .action(async opts => {
-      const { agoricNames, readLatestHead } = await makeRpcUtils(
+      const { agoricNames, readLatestHead } = await makeVstorageKit(
         { fetch },
         networkConfig,
       );
@@ -294,7 +294,7 @@ export const makeGovCommand = (_logger, io = {}) => {
       normalizeAddress,
     )
     .action(async opts => {
-      const { agoricNames, readLatestHead } = await makeRpcUtils(
+      const { agoricNames, readLatestHead } = await makeVstorageKit(
         { fetch },
         networkConfig,
       );
@@ -333,7 +333,7 @@ export const makeGovCommand = (_logger, io = {}) => {
       normalizeAddress,
     )
     .action(async function (opts, options) {
-      const utils = await makeRpcUtils({ fetch }, networkConfig);
+      const utils = await makeVstorageKit({ fetch }, networkConfig);
       const { readLatestHead } = utils;
 
       const info = await readLatestHead(
diff --git a/packages/agoric-cli/src/commands/inter.js b/packages/agoric-cli/src/commands/inter.js
index ac70eca77a9..cf59a2c35e5 100644
--- a/packages/agoric-cli/src/commands/inter.js
+++ b/packages/agoric-cli/src/commands/inter.js
@@ -4,21 +4,20 @@
  */
 
 // @ts-check
-import { CommanderError, InvalidArgumentError } from 'commander';
 import { makeWalletUtils } from '@agoric/client-utils';
 import { makeOfferSpecShape } from '@agoric/inter-protocol/src/auction/auctionBook.js';
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import { objectMap } from '@agoric/internal';
 import { M, matches } from '@endo/patterns';
-
+import { CommanderError, InvalidArgumentError } from 'commander';
 import { normalizeAddressWithOptions, pollBlocks } from '../lib/chain.js';
-import { getNetworkConfig } from '../lib/network-config.js';
 import { getCurrent, outputActionAndHint, sendAction } from '../lib/wallet.js';
 import {
   asBoardRemote,
-  makeAmountFormatter,
   bigintReplacer,
+  makeAmountFormatter,
 } from '../lib/format.js';
+import { getNetworkConfig } from '../lib/network-config.js';
 
 const { values } = Object;
 
diff --git a/packages/agoric-cli/src/commands/oracle.js b/packages/agoric-cli/src/commands/oracle.js
index 43392ef912c..dea5ed9e04a 100644
--- a/packages/agoric-cli/src/commands/oracle.js
+++ b/packages/agoric-cli/src/commands/oracle.js
@@ -2,7 +2,7 @@
 /* eslint-disable func-names */
 /* eslint-env node */
 import {
-  makeRpcUtils,
+  makeVstorageKit,
   makeWalletUtils,
   storageHelper,
 } from '@agoric/client-utils';
@@ -87,7 +87,7 @@ export const makeOracleCommand = (logger, io = {}) => {
   const rpcTools = async () => {
     // XXX pass fetch to getNetworkConfig() explicitly
     const networkConfig = await getNetworkConfig({ env: process.env, fetch });
-    const utils = await makeRpcUtils({ fetch }, networkConfig);
+    const utils = await makeVstorageKit({ fetch }, networkConfig);
 
     const lookupPriceAggregatorInstance = ([brandIn, brandOut]) => {
       const name = oracleBrandFeedName(brandIn, brandOut);
diff --git a/packages/agoric-cli/src/commands/psm.js b/packages/agoric-cli/src/commands/psm.js
index 1d00ec839d0..3a601db299a 100644
--- a/packages/agoric-cli/src/commands/psm.js
+++ b/packages/agoric-cli/src/commands/psm.js
@@ -1,7 +1,7 @@
 // @ts-check
 /* eslint-disable func-names */
 /* eslint-env node */
-import { makeRpcUtils, storageHelper } from '@agoric/client-utils';
+import { makeVstorageKit, storageHelper } from '@agoric/client-utils';
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import { Command } from 'commander';
 import { getNetworkConfig } from '../lib/network-config.js';
@@ -63,7 +63,7 @@ export const makePsmCommand = logger => {
   );
 
   const rpcTools = async () => {
-    const utils = await makeRpcUtils({ fetch }, networkConfig);
+    const utils = await makeVstorageKit({ fetch }, networkConfig);
 
     const lookupPsmInstance = ([minted, anchor]) => {
       const name = `psm-${minted}-${anchor}`;
diff --git a/packages/agoric-cli/src/commands/reserve.js b/packages/agoric-cli/src/commands/reserve.js
index cb510283952..7c709d0d27f 100644
--- a/packages/agoric-cli/src/commands/reserve.js
+++ b/packages/agoric-cli/src/commands/reserve.js
@@ -1,7 +1,7 @@
 // @ts-check
 /* eslint-disable func-names */
 /* eslint-env node */
-import { makeRpcUtils } from '@agoric/client-utils';
+import { makeVstorageKit } from '@agoric/client-utils';
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import { Command } from 'commander';
 import { getNetworkConfig } from '../lib/network-config.js';
@@ -32,7 +32,7 @@ export const makeReserveCommand = (_logger, io = {}) => {
        * }} opts
        */
       async ({ collateralBrand, ...opts }) => {
-        const { agoricNames } = await makeRpcUtils({ fetch }, networkConfig);
+        const { agoricNames } = await makeVstorageKit({ fetch }, networkConfig);
 
         const offer = Offers.reserve.AddCollateral(agoricNames, {
           collateralBrandKey: collateralBrand,
@@ -66,7 +66,7 @@ export const makeReserveCommand = (_logger, io = {}) => {
       1,
     )
     .action(async function (opts) {
-      const { agoricNames } = await makeRpcUtils({ fetch }, networkConfig);
+      const { agoricNames } = await makeVstorageKit({ fetch }, networkConfig);
 
       const reserveInstance = agoricNames.instance.reserve;
       assert(reserveInstance, 'missing reserve in names');
diff --git a/packages/agoric-cli/src/commands/vaults.js b/packages/agoric-cli/src/commands/vaults.js
index bc076b0f9bb..185157c1c3d 100644
--- a/packages/agoric-cli/src/commands/vaults.js
+++ b/packages/agoric-cli/src/commands/vaults.js
@@ -1,7 +1,7 @@
 // @ts-check
 /* eslint-disable func-names */
 /* eslint-env node */
-import { makeRpcUtils } from '@agoric/client-utils';
+import { makeVstorageKit } from '@agoric/client-utils';
 import {
   lookupOfferIdForVault,
   Offers,
@@ -39,7 +39,10 @@ export const makeVaultsCommand = logger => {
       normalizeAddress,
     )
     .action(async function (opts) {
-      const { readLatestHead } = await makeRpcUtils({ fetch }, networkConfig);
+      const { readLatestHead } = await makeVstorageKit(
+        { fetch },
+        networkConfig,
+      );
 
       const current = await getCurrent(opts.from, {
         readLatestHead,
@@ -64,7 +67,7 @@ export const makeVaultsCommand = logger => {
     .option('--collateralBrand <string>', 'Collateral brand key', 'ATOM')
     .action(async function (opts) {
       logger.warn('running with options', opts);
-      const { agoricNames } = await makeRpcUtils({ fetch }, networkConfig);
+      const { agoricNames } = await makeVstorageKit({ fetch }, networkConfig);
 
       const offer = Offers.vaults.OpenVault(agoricNames, {
         giveCollateral: opts.giveCollateral,
@@ -99,7 +102,7 @@ export const makeVaultsCommand = logger => {
     .requiredOption('--vaultId <string>', 'Key of vault (e.g. vault1)')
     .action(async function (opts) {
       logger.warn('running with options', opts);
-      const { agoricNames, readLatestHead } = await makeRpcUtils(
+      const { agoricNames, readLatestHead } = await makeVstorageKit(
         { fetch },
         networkConfig,
       );
@@ -143,7 +146,7 @@ export const makeVaultsCommand = logger => {
     )
     .action(async function (opts) {
       logger.warn('running with options', opts);
-      const { agoricNames, readLatestHead } = await makeRpcUtils(
+      const { agoricNames, readLatestHead } = await makeVstorageKit(
         { fetch },
         networkConfig,
       );
diff --git a/packages/agoric-cli/src/commands/wallet.js b/packages/agoric-cli/src/commands/wallet.js
index a40cd1d1744..480d37f4aa0 100644
--- a/packages/agoric-cli/src/commands/wallet.js
+++ b/packages/agoric-cli/src/commands/wallet.js
@@ -8,7 +8,7 @@ import {
   makeLeader,
   makeLeaderFromRpcAddresses,
 } from '@agoric/casting';
-import { makeRpcUtils } from '@agoric/client-utils';
+import { makeVstorageKit } from '@agoric/client-utils';
 import { execFileSync } from 'child_process';
 import fs from 'fs';
 import util from 'util';
@@ -105,7 +105,7 @@ export const makeWalletCommand = async command => {
     .action(async function (opts) {
       const offerStr = fs.readFileSync(opts.file).toString();
 
-      const { unserializer } = await makeRpcUtils({ fetch }, networkConfig);
+      const { unserializer } = await makeVstorageKit({ fetch }, networkConfig);
 
       const offerObj = unserializer.fromCapData(JSON.parse(offerStr));
       console.log(offerObj);
@@ -120,7 +120,7 @@ export const makeWalletCommand = async command => {
     .action(async function (opts) {
       const offerStr = fs.readFileSync(opts.offer).toString();
 
-      const { unserializer } = await makeRpcUtils({ fetch }, networkConfig);
+      const { unserializer } = await makeVstorageKit({ fetch }, networkConfig);
 
       const offerObj = unserializer.fromCapData(JSON.parse(offerStr));
       console.log(offerObj.offer.id);
@@ -158,7 +158,7 @@ export const makeWalletCommand = async command => {
     .command('list')
     .description('list all wallets in vstorage')
     .action(async function () {
-      const { vstorage } = await makeRpcUtils({ fetch }, networkConfig);
+      const { vstorage } = await makeVstorageKit({ fetch }, networkConfig);
       const wallets = await vstorage.keys('published.wallet');
       process.stdout.write(wallets.join('\n'));
     });
@@ -172,12 +172,13 @@ export const makeWalletCommand = async command => {
       normalizeAddress,
     )
     .action(async function (opts) {
-      const { agoricNames, unserializer, readLatestHead } = await makeRpcUtils(
-        {
-          fetch,
-        },
-        networkConfig,
-      );
+      const { agoricNames, unserializer, readLatestHead } =
+        await makeVstorageKit(
+          {
+            fetch,
+          },
+          networkConfig,
+        );
 
       const leader = makeLeader(networkConfig.rpcAddrs[0]);
       const follower = await makeFollower(
diff --git a/packages/agoric-cli/src/lib/wallet.js b/packages/agoric-cli/src/lib/wallet.js
index 63ac4597373..aded59c45fe 100644
--- a/packages/agoric-cli/src/lib/wallet.js
+++ b/packages/agoric-cli/src/lib/wallet.js
@@ -10,7 +10,7 @@ import { execSwingsetTransaction, pollTx } from './chain.js';
 /**
  * @import {CurrentWalletRecord} from '@agoric/smart-wallet/src/smartWallet.js';
  * @import {AgoricNamesRemotes} from '@agoric/vats/tools/board-utils.js';
- * @import {MinimalNetworkConfig, RpcUtils} from '@agoric/client-utils';
+ * @import {MinimalNetworkConfig, WalletUtils} from '@agoric/client-utils';
  */
 
 const marshaller = boardSlottingMarshaller();
@@ -25,7 +25,7 @@ const emptyCurrentRecord = {
 
 /**
  * @param {string} addr
- * @param {Pick<RpcUtils, 'readLatestHead'>} io
+ * @param {Pick<WalletUtils, 'readLatestHead'>} io
  * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord>}
  */
 export const getCurrent = async (addr, { readLatestHead }) => {
@@ -60,7 +60,7 @@ export const getCurrent = async (addr, { readLatestHead }) => {
 
 /**
  * @param {string} addr
- * @param {Pick<RpcUtils, 'readLatestHead'>} io
+ * @param {Pick<WalletUtils, 'readLatestHead'>} io
  * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').UpdateRecord>}
  */
 export const getLastUpdate = (addr, { readLatestHead }) => {
diff --git a/packages/agoric-cli/test/inter-cli.test.js b/packages/agoric-cli/test/inter-cli.test.js
index ab3d6c92288..38e3b970feb 100644
--- a/packages/agoric-cli/test/inter-cli.test.js
+++ b/packages/agoric-cli/test/inter-cli.test.js
@@ -4,9 +4,9 @@ import '@endo/init';
 import test from 'ava';
 import { CommanderError, createCommand } from 'commander';
 
-import { boardSlottingMarshaller, makeFromBoard } from '@agoric/client-utils';
 import { makeParseAmount } from '@agoric/inter-protocol/src/clientSupport.js';
 import { Far } from '@endo/far';
+import { boardSlottingMarshaller, makeFromBoard } from '@agoric/client-utils';
 
 import { fmtBid, makeInterCommand } from '../src/commands/inter.js';
 
diff --git a/packages/client-utils/src/chain.js b/packages/client-utils/src/chain.js
index b42314a63f3..0ac2f32c372 100644
--- a/packages/client-utils/src/chain.js
+++ b/packages/client-utils/src/chain.js
@@ -1,21 +1,7 @@
 /**
- * @import {MinimalNetworkConfig} from '@agoric/client-utils';
+ * @import {StargateClient} from '@cosmjs/stargate';
  */
 
-import { StargateClient } from '@cosmjs/stargate';
-import { makeTendermint34Client, pickEndpoint } from './rpc.js';
-
-/**
- * @param {MinimalNetworkConfig} config
- * @param {{ fetch: typeof window.fetch }} io
- * @returns {Promise<StargateClient>}
- */
-export const makeStargateClient = async (config, { fetch }) => {
-  const url = pickEndpoint(config);
-  const tm = await makeTendermint34Client(url, { fetch });
-  return StargateClient.create(tm);
-};
-
 /**
  * @param {{
  *   client: StargateClient,
diff --git a/packages/client-utils/src/main.js b/packages/client-utils/src/main.js
index d22b4429d57..226227b2e25 100644
--- a/packages/client-utils/src/main.js
+++ b/packages/client-utils/src/main.js
@@ -1,2 +1,4 @@
 export * from './rpc.js';
+export * from './sync-tools.js';
+export * from './vstorage-kit.js';
 export * from './wallet-utils.js';
diff --git a/packages/client-utils/src/rpc.js b/packages/client-utils/src/rpc.js
index 64df53ecee6..7ca6330b0d7 100644
--- a/packages/client-utils/src/rpc.js
+++ b/packages/client-utils/src/rpc.js
@@ -1,13 +1,7 @@
-/* global Buffer */
-import {
-  boardSlottingMarshaller,
-  makeBoardRemote,
-} from '@agoric/vats/tools/board-utils.js';
 import { makeTendermintRpcClient } from '@agoric/casting';
+import { StargateClient } from '@cosmjs/stargate';
 import { Tendermint34Client } from '@cosmjs/tendermint-rpc';
 
-export { boardSlottingMarshaller };
-
 /**
  * @typedef {{ rpcAddrs: string[], chainName: string }} MinimalNetworkConfig
  */
@@ -15,240 +9,6 @@ export { boardSlottingMarshaller };
 // TODO distribute load
 export const pickEndpoint = ({ rpcAddrs }) => rpcAddrs[0];
 
-/**
- * @param {object} powers
- * @param {typeof window.fetch} powers.fetch
- * @param {MinimalNetworkConfig} config
- */
-export const makeVStorage = (powers, config) => {
-  /** @param {string} path */
-  const getJSON = path => {
-    const url = config.rpcAddrs[0] + path;
-    // console.warn('fetching', url);
-    return powers.fetch(url, { keepalive: true }).then(res => res.json());
-  };
-  // height=0 is the same as omitting height and implies the highest block
-  const url = (path = 'published', { kind = 'children', height = 0 } = {}) =>
-    `/abci_query?path=%22/custom/vstorage/${kind}/${path}%22&height=${height}`;
-
-  const readStorage = (path = 'published', { kind = 'children', height = 0 }) =>
-    getJSON(url(path, { kind, height }))
-      .catch(err => {
-        throw Error(`cannot read ${kind} of ${path}: ${err.message}`);
-      })
-      .then(data => {
-        const {
-          result: { response },
-        } = data;
-        if (response?.code !== 0) {
-          /** @type {any} */
-          const err = Error(
-            `error code ${response?.code} reading ${kind} of ${path}: ${response.log}`,
-          );
-          err.code = response?.code;
-          err.codespace = response?.codespace;
-          throw err;
-        }
-        return data;
-      });
-
-  return {
-    url,
-    decode({ result: { response } }) {
-      const { code } = response;
-      if (code !== 0) {
-        throw response;
-      }
-      const { value } = response;
-      return Buffer.from(value, 'base64').toString();
-    },
-    /**
-     *
-     * @param {string} path
-     * @returns {Promise<string>} latest vstorage value at path
-     */
-    async readLatest(path = 'published') {
-      const raw = await readStorage(path, { kind: 'data' });
-      return this.decode(raw);
-    },
-    async keys(path = 'published') {
-      const raw = await readStorage(path, { kind: 'children' });
-      return JSON.parse(this.decode(raw)).children;
-    },
-    /**
-     * @param {string} path
-     * @param {number} [height] default is highest
-     * @returns {Promise<{blockHeight: number, values: string[]}>}
-     */
-    async readAt(path, height = undefined) {
-      const raw = await readStorage(path, { kind: 'data', height });
-      const txt = this.decode(raw);
-      /** @type {{ value: string }} */
-      const { value } = JSON.parse(txt);
-      return JSON.parse(value);
-    },
-    /**
-     * Read values going back as far as available
-     *
-     * @param {string} path
-     * @param {number | string} [minHeight]
-     * @returns {Promise<string[]>}
-     */
-    async readFully(path, minHeight = undefined) {
-      const parts = [];
-      // undefined the first iteration, to query at the highest
-      let blockHeight;
-      await null;
-      do {
-        // console.debug('READING', { blockHeight });
-        let values;
-        try {
-          ({ blockHeight, values } = await this.readAt(
-            path,
-            blockHeight && Number(blockHeight) - 1,
-          ));
-          // console.debug('readAt returned', { blockHeight });
-        } catch (err) {
-          if (
-            // CosmosSDK ErrInvalidRequest with particular message text;
-            // misrepresentation of pruned data
-            // TODO replace after incorporating a fix to
-            // https://github.com/cosmos/cosmos-sdk/issues/19992
-            err.codespace === 'sdk' &&
-            err.code === 18 &&
-            err.message.match(/pruned/)
-          ) {
-            // console.error(err);
-            break;
-          }
-          throw err;
-        }
-        parts.push(values);
-        // console.debug('PUSHED', values);
-        // console.debug('NEW', { blockHeight, minHeight });
-        if (minHeight && Number(blockHeight) <= Number(minHeight)) break;
-      } while (blockHeight > 0);
-      return parts.flat();
-    },
-  };
-};
-/** @typedef {ReturnType<typeof makeVStorage>} VStorage */
-
-/** @deprecated */
-export const makeFromBoard = () => {
-  const cache = new Map();
-  const convertSlotToVal = (boardId, iface) => {
-    if (cache.has(boardId)) {
-      return cache.get(boardId);
-    }
-    const val = makeBoardRemote({ boardId, iface });
-    cache.set(boardId, val);
-    return val;
-  };
-  return harden({ convertSlotToVal });
-};
-/** @typedef {ReturnType<typeof makeFromBoard>} IdMap */
-
-/** @deprecated */
-export const storageHelper = {
-  /** @param { string } txt */
-  parseCapData: txt => {
-    assert(typeof txt === 'string', typeof txt);
-    /** @type {{ value: string }} */
-    const { value } = JSON.parse(txt);
-    const specimen = JSON.parse(value);
-    const { blockHeight, values } = specimen;
-    assert(values, `empty values in specimen ${value}`);
-    const capDatas = storageHelper.parseMany(values);
-    return { blockHeight, capDatas };
-  },
-  /**
-   * @param {string} txt
-   * @param {IdMap} ctx
-   */
-  unserializeTxt: (txt, ctx) => {
-    const { capDatas } = storageHelper.parseCapData(txt);
-    return capDatas.map(capData =>
-      boardSlottingMarshaller(ctx.convertSlotToVal).fromCapData(capData),
-    );
-  },
-  /** @param {string[]} capDataStrings array of stringified capData */
-  parseMany: capDataStrings => {
-    assert(capDataStrings && capDataStrings.length);
-    /** @type {{ body: string, slots: string[] }[]} */
-    const capDatas = capDataStrings.map(s => JSON.parse(s));
-    for (const capData of capDatas) {
-      assert(typeof capData === 'object' && capData !== null);
-      assert('body' in capData && 'slots' in capData);
-      assert(typeof capData.body === 'string');
-      assert(Array.isArray(capData.slots));
-    }
-    return capDatas;
-  },
-};
-harden(storageHelper);
-
-/**
- * @deprecated
- * @param {IdMap} ctx
- * @param {VStorage} vstorage
- * @returns {Promise<import('@agoric/vats/tools/board-utils.js').AgoricNamesRemotes>}
- */
-export const makeAgoricNames = async (ctx, vstorage) => {
-  const reverse = {};
-  const entries = await Promise.all(
-    ['brand', 'instance', 'vbankAsset'].map(async kind => {
-      const content = await vstorage.readLatest(
-        `published.agoricNames.${kind}`,
-      );
-      /** @type {Array<[string, import('@agoric/vats/tools/board-utils.js').BoardRemote]>} */
-      const parts = storageHelper.unserializeTxt(content, ctx).at(-1);
-      for (const [name, remote] of parts) {
-        if ('getBoardId' in remote) {
-          reverse[remote.getBoardId()] = name;
-        }
-      }
-      return [kind, Object.fromEntries(parts)];
-    }),
-  );
-  return { ...Object.fromEntries(entries), reverse };
-};
-
-/**
- * @param {{ fetch: typeof window.fetch }} io
- * @param {MinimalNetworkConfig} config
- */
-export const makeRpcUtils = async ({ fetch }, config) => {
-  await null;
-  try {
-    const vstorage = makeVStorage({ fetch }, config);
-    const fromBoard = makeFromBoard();
-    const agoricNames = await makeAgoricNames(fromBoard, vstorage);
-
-    const marshaller = boardSlottingMarshaller(fromBoard.convertSlotToVal);
-
-    /** @type {(txt: string) => unknown} */
-    const unserializeHead = txt =>
-      storageHelper.unserializeTxt(txt, fromBoard).at(-1);
-
-    /** @type {(path: string) => Promise<unknown>} */
-    const readLatestHead = path =>
-      vstorage.readLatest(path).then(unserializeHead);
-
-    return {
-      agoricNames,
-      fromBoard,
-      marshaller,
-      readLatestHead,
-      unserializeHead,
-      vstorage,
-    };
-  } catch (err) {
-    throw Error(`RPC failure (${config.rpcAddrs}): ${err.message}`);
-  }
-};
-/** @typedef {Awaited<ReturnType<typeof makeRpcUtils>>} RpcUtils */
-
 /**
  * @param {string} endpoint
  * @param {{ fetch: typeof window.fetch }} io
@@ -258,3 +18,14 @@ export const makeTendermint34Client = (endpoint, { fetch }) => {
   const rpcClient = makeTendermintRpcClient(endpoint, fetch);
   return Tendermint34Client.create(rpcClient);
 };
+
+/**
+ * @param {MinimalNetworkConfig} config
+ * @param {{ fetch: typeof window.fetch }} io
+ * @returns {Promise<StargateClient>}
+ */
+export const makeStargateClient = async (config, { fetch }) => {
+  const url = pickEndpoint(config);
+  const tm = await makeTendermint34Client(url, { fetch });
+  return StargateClient.create(tm);
+};
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/sync-tools.js b/packages/client-utils/src/sync-tools.js
similarity index 86%
rename from a3p-integration/proposals/z:acceptance/test-lib/sync-tools.js
rename to packages/client-utils/src/sync-tools.js
index dac2ba7e04f..a2aa6db98d8 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/sync-tools.js
+++ b/packages/client-utils/src/sync-tools.js
@@ -1,5 +1,3 @@
-/* eslint-env node */
-
 /**
  * @file The purpose of this file is to bring together a set of tools that
  * developers can use to synchronize operations they carry out in their tests.
@@ -18,8 +16,6 @@
  * @typedef {object} RetryOptions
  * @property {number} [maxRetries]
  * @property {number} [retryIntervalMs]
- * @property {(...arg0: string[]) => void} [log]
- * @property {(callback: Function, delay: number) => void} [setTimeout]
  *
  * @typedef {RetryOptions & {errorMessage: string}} WaitUntilOptions
  *
@@ -28,15 +24,13 @@
  * @property {number} value
  */
 
-const ambientSetTimeout = global.setTimeout;
-
 /**
  * From https://github.com/Agoric/agoric-sdk/blob/442f07c8f0af03281b52b90e90c27131eef6f331/multichain-testing/tools/sleep.ts#L10
  *
  * @param {number} ms
- * @param {*} sleepOptions
+ * @param {{log: (message: string) => void, setTimeout: typeof global.setTimeout}} io
  */
-export const sleep = (ms, { log = () => {}, setTimeout = ambientSetTimeout }) =>
+export const sleep = (ms, { log = () => {}, setTimeout }) =>
   new Promise(resolve => {
     log(`Sleeping for ${ms}ms...`);
     setTimeout(resolve, ms);
@@ -48,7 +42,7 @@ export const sleep = (ms, { log = () => {}, setTimeout = ambientSetTimeout }) =>
  * @param {() => Promise} operation
  * @param {(result: any) => boolean} condition
  * @param {string} message
- * @param {RetryOptions} options
+ * @param {RetryOptions & {log?: typeof console.log, setTimeout: typeof global.setTimeout}} options
  */
 export const retryUntilCondition = async (
   operation,
@@ -59,6 +53,8 @@ export const retryUntilCondition = async (
   console.log({ maxRetries, retryIntervalMs, message });
   let retries = 0;
 
+  await null; // separate sync prologue
+
   while (retries < maxRetries) {
     try {
       const result = await operation();
@@ -112,7 +108,7 @@ const makeGetInstances = follow => async () => {
 /**
  *
  * @param {string} contractName
- * @param {{follow: () => object, setTimeout: (object) => void}} ambientAuthority
+ * @param {{ log: (message: string) => void, follow: () => object, setTimeout: typeof global.setTimeout }} ambientAuthority
  * @param {WaitUntilOptions} options
  */
 export const waitUntilContractDeployed = (
@@ -153,17 +149,12 @@ const checkCosmosBalance = (balances, threshold) => {
 
 /**
  * @param {string} destAcct
- * @param {{query: () => Promise<object>, setTimeout: (object) => void}} ambientAuthority
+ * @param {{ log: (message: string) => void, query: () => Promise<object>, setTimeout: typeof global.setTimeout}} io
  * @param {{denom: string, value: number}} threshold
  * @param {WaitUntilOptions} options
  */
-export const waitUntilAccountFunded = (
-  destAcct,
-  ambientAuthority,
-  threshold,
-  options,
-) => {
-  const { query, setTimeout } = ambientAuthority;
+export const waitUntilAccountFunded = (destAcct, io, threshold, options) => {
+  const { query, setTimeout } = io;
   const queryCosmosBalance = makeQueryCosmosBalance(query);
   const { maxRetries, retryIntervalMs, errorMessage, log } =
     overrideDefaultOptions(options);
@@ -208,17 +199,17 @@ const checkOfferState = (offerStatus, waitForPayouts, offerId) => {
  * @param {string} addr
  * @param {string} offerId
  * @param {boolean} waitForPayouts
- * @param {{follow: () => object, setTimeout: (callback: Function, delay: number) => void}} ambientAuthority
+ * @param {{ log: typeof console.log, follow: () => object, setTimeout: typeof global.setTimeout }} io
  * @param {WaitUntilOptions} options
  */
 export const waitUntilOfferResult = (
   addr,
   offerId,
   waitForPayouts,
-  ambientAuthority,
+  io,
   options,
 ) => {
-  const { follow, setTimeout } = ambientAuthority;
+  const { follow, setTimeout } = io;
   const queryWallet = makeQueryWallet(follow);
   const { maxRetries, retryIntervalMs, errorMessage, log } =
     overrideDefaultOptions(options);
@@ -250,15 +241,11 @@ const checkForInvitation = update => {
 /**
  *
  * @param {string} addr
- * @param {{follow: () => object, setTimeout: (object) => void}} ambientAuthority
+ * @param {{ follow: () => object, log: typeof console.log, setTimeout: typeof global.setTimeout}} io
  * @param {WaitUntilOptions} options
  */
-export const waitUntilInvitationReceived = (
-  addr,
-  ambientAuthority,
-  options,
-) => {
-  const { follow, setTimeout } = ambientAuthority;
+export const waitUntilInvitationReceived = (addr, io, options) => {
+  const { follow, setTimeout } = io;
   const queryWallet = makeQueryWallet(follow);
   const { maxRetries, retryIntervalMs, errorMessage, log } =
     overrideDefaultOptions(options);
diff --git a/packages/client-utils/src/vstorage-kit.js b/packages/client-utils/src/vstorage-kit.js
new file mode 100644
index 00000000000..3dce95e2c64
--- /dev/null
+++ b/packages/client-utils/src/vstorage-kit.js
@@ -0,0 +1,248 @@
+/* global Buffer */
+import {
+  boardSlottingMarshaller,
+  makeBoardRemote,
+} from '@agoric/vats/tools/board-utils.js';
+
+export { boardSlottingMarshaller };
+
+/**
+ * @import {MinimalNetworkConfig} from './rpc.js';
+ */
+
+/**
+ * @param {object} powers
+ * @param {typeof window.fetch} powers.fetch
+ * @param {MinimalNetworkConfig} config
+ */
+export const makeVStorage = (powers, config) => {
+  /** @param {string} path */
+  const getJSON = path => {
+    const url = config.rpcAddrs[0] + path;
+    // console.warn('fetching', url);
+    return powers.fetch(url, { keepalive: true }).then(res => res.json());
+  };
+  // height=0 is the same as omitting height and implies the highest block
+  const url = (path = 'published', { kind = 'children', height = 0 } = {}) =>
+    `/abci_query?path=%22/custom/vstorage/${kind}/${path}%22&height=${height}`;
+
+  const readStorage = (path = 'published', { kind = 'children', height = 0 }) =>
+    getJSON(url(path, { kind, height }))
+      .catch(err => {
+        throw Error(`cannot read ${kind} of ${path}: ${err.message}`);
+      })
+      .then(data => {
+        const {
+          result: { response },
+        } = data;
+        if (response?.code !== 0) {
+          /** @type {any} */
+          const err = Error(
+            `error code ${response?.code} reading ${kind} of ${path}: ${response.log}`,
+          );
+          err.code = response?.code;
+          err.codespace = response?.codespace;
+          throw err;
+        }
+        return data;
+      });
+
+  return {
+    url,
+    decode({ result: { response } }) {
+      const { code } = response;
+      if (code !== 0) {
+        throw response;
+      }
+      const { value } = response;
+      return Buffer.from(value, 'base64').toString();
+    },
+    /**
+     *
+     * @param {string} path
+     * @returns {Promise<string>} latest vstorage value at path
+     */
+    async readLatest(path = 'published') {
+      const raw = await readStorage(path, { kind: 'data' });
+      return this.decode(raw);
+    },
+    async keys(path = 'published') {
+      const raw = await readStorage(path, { kind: 'children' });
+      return JSON.parse(this.decode(raw)).children;
+    },
+    /**
+     * @param {string} path
+     * @param {number} [height] default is highest
+     * @returns {Promise<{blockHeight: number, values: string[]}>}
+     */
+    async readAt(path, height = undefined) {
+      const raw = await readStorage(path, { kind: 'data', height });
+      const txt = this.decode(raw);
+      /** @type {{ value: string }} */
+      const { value } = JSON.parse(txt);
+      return JSON.parse(value);
+    },
+    /**
+     * Read values going back as far as available
+     *
+     * @param {string} path
+     * @param {number | string} [minHeight]
+     * @returns {Promise<string[]>}
+     */
+    async readFully(path, minHeight = undefined) {
+      const parts = [];
+      // undefined the first iteration, to query at the highest
+      let blockHeight;
+      await null;
+      do {
+        // console.debug('READING', { blockHeight });
+        let values;
+        try {
+          ({ blockHeight, values } = await this.readAt(
+            path,
+            blockHeight && Number(blockHeight) - 1,
+          ));
+          // console.debug('readAt returned', { blockHeight });
+        } catch (err) {
+          if (
+            // CosmosSDK ErrInvalidRequest with particular message text;
+            // misrepresentation of pruned data
+            // TODO replace after incorporating a fix to
+            // https://github.com/cosmos/cosmos-sdk/issues/19992
+            err.codespace === 'sdk' &&
+            err.code === 18 &&
+            err.message.match(/pruned/)
+          ) {
+            // console.error(err);
+            break;
+          }
+          throw err;
+        }
+        parts.push(values);
+        // console.debug('PUSHED', values);
+        // console.debug('NEW', { blockHeight, minHeight });
+        if (minHeight && Number(blockHeight) <= Number(minHeight)) break;
+      } while (blockHeight > 0);
+      return parts.flat();
+    },
+  };
+};
+/** @typedef {ReturnType<typeof makeVStorage>} VStorage */
+
+/** @deprecated */
+export const makeFromBoard = () => {
+  const cache = new Map();
+  const convertSlotToVal = (boardId, iface) => {
+    if (cache.has(boardId)) {
+      return cache.get(boardId);
+    }
+    const val = makeBoardRemote({ boardId, iface });
+    cache.set(boardId, val);
+    return val;
+  };
+  return harden({ convertSlotToVal });
+};
+/** @typedef {ReturnType<typeof makeFromBoard>} IdMap */
+
+/** @deprecated */
+export const storageHelper = {
+  /** @param { string } txt */
+  parseCapData: txt => {
+    assert(typeof txt === 'string', typeof txt);
+    /** @type {{ value: string }} */
+    const { value } = JSON.parse(txt);
+    const specimen = JSON.parse(value);
+    const { blockHeight, values } = specimen;
+    assert(values, `empty values in specimen ${value}`);
+    const capDatas = storageHelper.parseMany(values);
+    return { blockHeight, capDatas };
+  },
+  /**
+   * @param {string} txt
+   * @param {IdMap} ctx
+   */
+  unserializeTxt: (txt, ctx) => {
+    const { capDatas } = storageHelper.parseCapData(txt);
+    return capDatas.map(capData =>
+      boardSlottingMarshaller(ctx.convertSlotToVal).fromCapData(capData),
+    );
+  },
+  /** @param {string[]} capDataStrings array of stringified capData */
+  parseMany: capDataStrings => {
+    assert(capDataStrings && capDataStrings.length);
+    /** @type {{ body: string, slots: string[] }[]} */
+    const capDatas = capDataStrings.map(s => JSON.parse(s));
+    for (const capData of capDatas) {
+      assert(typeof capData === 'object' && capData !== null);
+      assert('body' in capData && 'slots' in capData);
+      assert(typeof capData.body === 'string');
+      assert(Array.isArray(capData.slots));
+    }
+    return capDatas;
+  },
+};
+harden(storageHelper);
+
+/**
+ * @deprecated
+ * @param {IdMap} ctx
+ * @param {VStorage} vstorage
+ * @returns {Promise<import('@agoric/vats/tools/board-utils.js').AgoricNamesRemotes>}
+ */
+export const makeAgoricNames = async (ctx, vstorage) => {
+  const reverse = {};
+  const entries = await Promise.all(
+    ['brand', 'instance', 'vbankAsset'].map(async kind => {
+      const content = await vstorage.readLatest(
+        `published.agoricNames.${kind}`,
+      );
+      /** @type {Array<[string, import('@agoric/vats/tools/board-utils.js').BoardRemote]>} */
+      const parts = storageHelper.unserializeTxt(content, ctx).at(-1);
+      for (const [name, remote] of parts) {
+        if ('getBoardId' in remote) {
+          reverse[remote.getBoardId()] = name;
+        }
+      }
+      return [kind, Object.fromEntries(parts)];
+    }),
+  );
+  return { ...Object.fromEntries(entries), reverse };
+};
+
+/**
+ * @param {{ fetch: typeof window.fetch }} io
+ * @param {MinimalNetworkConfig} config
+ */
+export const makeVstorageKit = async ({ fetch }, config) => {
+  await null;
+  try {
+    const vstorage = makeVStorage({ fetch }, config);
+    const fromBoard = makeFromBoard();
+    const agoricNames = await makeAgoricNames(fromBoard, vstorage);
+
+    const marshaller = boardSlottingMarshaller(fromBoard.convertSlotToVal);
+
+    /** @type {(txt: string) => unknown} */
+    const unserializeHead = txt =>
+      storageHelper.unserializeTxt(txt, fromBoard).at(-1);
+
+    /**
+     * Read latest at path and unmarshal it
+     * @type {(path: string) => Promise<unknown>}
+     */
+    const readLatestHead = path =>
+      vstorage.readLatest(path).then(unserializeHead);
+
+    return {
+      agoricNames,
+      fromBoard,
+      marshaller,
+      readLatestHead,
+      unserializeHead,
+      vstorage,
+    };
+  } catch (err) {
+    throw Error(`RPC failure (${config.rpcAddrs}): ${err.message}`);
+  }
+};
+/** @typedef {Awaited<ReturnType<typeof makeVstorageKit>>} VstorageKit */
diff --git a/packages/client-utils/src/wallet-utils.js b/packages/client-utils/src/wallet-utils.js
index 151291fbc54..27dc250ce1f 100644
--- a/packages/client-utils/src/wallet-utils.js
+++ b/packages/client-utils/src/wallet-utils.js
@@ -1,9 +1,11 @@
 import { makeWalletStateCoalescer } from '@agoric/smart-wallet/src/utils.js';
-import { makeStargateClient, pollBlocks } from './chain.js';
-import { boardSlottingMarshaller, makeRpcUtils } from './rpc.js';
+import { pollBlocks } from './chain.js';
+import { makeStargateClient } from './rpc.js';
+import { boardSlottingMarshaller, makeVstorageKit } from './vstorage-kit.js';
 
 /**
  * @import {Amount, Brand} from '@agoric/ertp/src/types.js'
+ * @import {CurrentWalletRecord, UpdateRecord} from '@agoric/smart-wallet/src/smartWallet.js';
  * @import {MinimalNetworkConfig} from './rpc.js';
  */
 
@@ -16,7 +18,7 @@ import { boardSlottingMarshaller, makeRpcUtils } from './rpc.js';
  */
 export const makeWalletUtils = async ({ fetch, delay }, networkConfig) => {
   const { agoricNames, fromBoard, marshaller, readLatestHead, vstorage } =
-    await makeRpcUtils({ fetch }, networkConfig);
+    await makeVstorageKit({ fetch }, networkConfig);
   const m = boardSlottingMarshaller(fromBoard.convertSlotToVal);
 
   const client = await makeStargateClient(networkConfig, { fetch });
@@ -81,11 +83,22 @@ export const makeWalletUtils = async ({ fetch, delay }, networkConfig) => {
 
   /**
    * @param {string} addr
-   * @returns {Promise<import('@agoric/smart-wallet/src/smartWallet.js').UpdateRecord>}
+   * @returns {Promise<UpdateRecord>}
    */
   const getLastUpdate = addr => {
-    // @ts-expect-error cast
-    return readLatestHead(`published.wallet.${addr}`);
+    return /** @type {Promise<UpdateRecord>} */ (
+      readLatestHead(`published.wallet.${addr}`)
+    );
+  };
+
+  /**
+   * @param {string} addr
+   * @returns {Promise<CurrentWalletRecord>}
+   */
+  const getCurrentWalletRecord = addr => {
+    return /** @type {Promise<CurrentWalletRecord>} */ (
+      readLatestHead(`published.wallet.${addr}.current`)
+    );
   };
 
   return {
@@ -95,6 +108,7 @@ export const makeWalletUtils = async ({ fetch, delay }, networkConfig) => {
     marshaller,
     vstorage,
     getLastUpdate,
+    getCurrentWalletRecord,
     readLatestHead,
     storedWalletState,
     pollOffer,
diff --git a/packages/client-utils/test/snapshots/exports.test.js.md b/packages/client-utils/test/snapshots/exports.test.js.md
index 4c9278c387d..8a1c268100a 100644
--- a/packages/client-utils/test/snapshots/exports.test.js.md
+++ b/packages/client-utils/test/snapshots/exports.test.js.md
@@ -12,9 +12,17 @@ Generated by [AVA](https://avajs.dev).
       'boardSlottingMarshaller',
       'makeAgoricNames',
       'makeFromBoard',
-      'makeRpcUtils',
+      'makeStargateClient',
+      'makeTendermint34Client',
       'makeVStorage',
+      'makeVstorageKit',
       'makeWalletUtils',
       'pickEndpoint',
+      'retryUntilCondition',
+      'sleep',
       'storageHelper',
+      'waitUntilAccountFunded',
+      'waitUntilContractDeployed',
+      'waitUntilInvitationReceived',
+      'waitUntilOfferResult',
     ]
diff --git a/packages/client-utils/test/snapshots/exports.test.js.snap b/packages/client-utils/test/snapshots/exports.test.js.snap
index 69755e0fad0..831d79980ba 100644
Binary files a/packages/client-utils/test/snapshots/exports.test.js.snap and b/packages/client-utils/test/snapshots/exports.test.js.snap differ
diff --git a/a3p-integration/proposals/z:acceptance/test-lib/sync-tools.test.js b/packages/client-utils/test/sync-tools.test.js
similarity index 85%
rename from a3p-integration/proposals/z:acceptance/test-lib/sync-tools.test.js
rename to packages/client-utils/test/sync-tools.test.js
index 2b0d3603c4b..0c6bfe3f5f0 100644
--- a/a3p-integration/proposals/z:acceptance/test-lib/sync-tools.test.js
+++ b/packages/client-utils/test/sync-tools.test.js
@@ -1,13 +1,17 @@
 /* eslint-env node */
 // @ts-check
 import test from 'ava';
-import '@endo/init/debug.js';
+
 import {
   waitUntilAccountFunded,
   waitUntilContractDeployed,
   waitUntilInvitationReceived,
   waitUntilOfferResult,
-} from './sync-tools.js';
+} from '../src/sync-tools.js';
+
+// keep these small for tests
+const retryIntervalMs = 10;
+const DEFAULT_TIMEOUT = 30;
 
 const makeFakeFollow = () => {
   let value = [[]];
@@ -48,17 +52,17 @@ test.serial('wait until contract is deployed', async t => {
     'name',
     {
       follow,
+      log: t.log,
       setTimeout,
     },
     {
       maxRetries: 5,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'Contract not deployed yet',
     },
   );
 
-  setTimeout(() => setValue([['name', true]]), 3000); // set desired value after third retry
+  setTimeout(() => setValue([['name', true]]), DEFAULT_TIMEOUT); // set desired value after third retry
 
   await t.notThrowsAsync(waitP);
 });
@@ -68,12 +72,11 @@ test.serial('wait until account funded', async t => {
 
   const waitP = waitUntilAccountFunded(
     'agoric12345',
-    { query, setTimeout },
+    { log: t.log, query, setTimeout },
     { denom: 'ufake', value: 100_000 },
     {
       maxRetries: 5,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'Account not funded yet',
     },
   );
@@ -98,7 +101,7 @@ test.serial('wait until account funded', async t => {
       total: '0',
     },
   };
-  setTimeout(() => setResult(desiredResult), 3000); // set desired value after third retry
+  setTimeout(() => setResult(desiredResult), DEFAULT_TIMEOUT); // set desired value after third retry
   await t.notThrowsAsync(waitP);
 });
 
@@ -107,12 +110,11 @@ test.serial('wait until account funded, insufficient balance', async t => {
 
   const waitP = waitUntilAccountFunded(
     'agoric12345',
-    { query, setTimeout },
+    { log: t.log, query, setTimeout },
     { denom: 'ufake', value: 100_000 },
     {
       maxRetries: 5,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'Account not funded yet',
     },
   );
@@ -137,7 +139,7 @@ test.serial('wait until account funded, insufficient balance', async t => {
       total: '0',
     },
   };
-  setTimeout(() => setResult(desiredResult), 3000); // set desired value after third retry
+  setTimeout(() => setResult(desiredResult), DEFAULT_TIMEOUT); // set desired value after third retry
   await t.throwsAsync(waitP, { message: /Account not funded yet/ });
 });
 
@@ -151,11 +153,10 @@ test.serial(
       'agoric12345',
       'my-offer',
       false,
-      { follow, setTimeout },
+      { log: t.log, follow, setTimeout },
       {
         maxRetries: 5,
-        retryIntervalMs: 1000,
-        log: t.log,
+        retryIntervalMs,
         errorMessage: 'Wrong update type',
       },
     );
@@ -172,11 +173,10 @@ test.serial('wait until offer result, wrong id - should throw', async t => {
     'agoric12345',
     'my-offer',
     false,
-    { follow, setTimeout },
+    { log: t.log, follow, setTimeout },
     {
       maxRetries: 5,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'Wrong offer id',
     },
   );
@@ -192,11 +192,10 @@ test.serial('wait until offer result, no "status" - should throw', async t => {
     'agoric12345',
     'my-offer',
     false,
-    { follow, setTimeout },
+    { follow, log: t.log, setTimeout },
     {
       maxRetries: 5,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'No "status" object',
     },
   );
@@ -217,11 +216,10 @@ test.serial(
       'agoric12345',
       'my-offer',
       false,
-      { follow, setTimeout },
+      { follow, log: t.log, setTimeout },
       {
         maxRetries: 5,
-        retryIntervalMs: 1000,
-        log: t.log,
+        retryIntervalMs,
         errorMessage: '"numWantsSatisfied" is not 1',
       },
     );
@@ -238,11 +236,10 @@ test.serial('wait until offer result, do not wait for "payouts"', async t => {
     'agoric12345',
     'my-offer',
     false,
-    { follow, setTimeout },
+    { follow, log: t.log, setTimeout },
     {
       maxRetries: 7,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'offer not resulted on time',
     },
   );
@@ -253,7 +250,7 @@ test.serial('wait until offer result, do not wait for "payouts"', async t => {
         status: { id: 'my-offer', numWantsSatisfied: 1 },
         updated: 'offerStatus',
       }),
-    1000,
+    10,
   ); // First, offer is seated
   setTimeout(
     () =>
@@ -261,7 +258,7 @@ test.serial('wait until offer result, do not wait for "payouts"', async t => {
         status: { id: 'my-offer', numWantsSatisfied: 1, result: 'thank you' },
         updated: 'offerStatus',
       }),
-    3000,
+    DEFAULT_TIMEOUT,
   ); // Then offer got results
 
   await t.notThrowsAsync(waitP);
@@ -275,11 +272,10 @@ test.serial('wait until offer result, wait for "payouts"', async t => {
     'agoric12345',
     'my-offer',
     true,
-    { follow, setTimeout },
+    { follow, log: t.log, setTimeout },
     {
       maxRetries: 7,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'payouts not received on time',
     },
   );
@@ -290,7 +286,7 @@ test.serial('wait until offer result, wait for "payouts"', async t => {
         status: { id: 'my-offer', numWantsSatisfied: 1 },
         updated: 'offerStatus',
       }),
-    1000,
+    10,
   ); // First, offer is seated
   setTimeout(
     () =>
@@ -298,7 +294,7 @@ test.serial('wait until offer result, wait for "payouts"', async t => {
         status: { id: 'my-offer', numWantsSatisfied: 1, result: 'thank you' },
         updated: 'offerStatus',
       }),
-    3000,
+    30,
   ); // Now offer got results
   setTimeout(
     () =>
@@ -311,7 +307,7 @@ test.serial('wait until offer result, wait for "payouts"', async t => {
         },
         updated: 'offerStatus',
       }),
-    4000,
+    40,
   ); // Payouts are received
 
   await t.notThrowsAsync(waitP);
@@ -325,11 +321,10 @@ test.serial(
 
     const waitP = waitUntilInvitationReceived(
       'agoric12345',
-      { follow, setTimeout },
+      { follow, log: t.log, setTimeout },
       {
         maxRetries: 3,
-        retryIntervalMs: 1000,
-        log: t.log,
+        retryIntervalMs,
         errorMessage: 'wrong "updated" value',
       },
     );
@@ -346,18 +341,17 @@ test.serial(
 
     const waitP = waitUntilInvitationReceived(
       'agoric12345',
-      { follow, setTimeout },
+      { follow, log: t.log, setTimeout },
       {
         maxRetries: 5,
-        retryIntervalMs: 1000,
-        log: t.log,
+        retryIntervalMs,
         errorMessage: 'faulty "currentAmount" object',
       },
     );
 
     setTimeout(
       () => setValue({ updated: 'balance', currentAmount: { foo: true } }),
-      2000,
+      20,
     );
 
     await t.throwsAsync(waitP, { message: /faulty "currentAmount" object/ });
@@ -372,11 +366,10 @@ test.serial(
 
     const waitP = waitUntilInvitationReceived(
       'agoric12345',
-      { follow, setTimeout },
+      { follow, log: t.log, setTimeout },
       {
         maxRetries: 3,
-        retryIntervalMs: 1000,
-        log: t.log,
+        retryIntervalMs,
         errorMessage: 'brand string do not match',
       },
     );
@@ -391,11 +384,10 @@ test.serial('wait until invitation recevied', async t => {
 
   const waitP = waitUntilInvitationReceived(
     'agoric12345',
-    { follow, setTimeout },
+    { follow, log: t.log, setTimeout },
     {
       maxRetries: 5,
-      retryIntervalMs: 1000,
-      log: t.log,
+      retryIntervalMs,
       errorMessage: 'brand string do not match',
     },
   );
@@ -406,7 +398,7 @@ test.serial('wait until invitation recevied', async t => {
         updated: 'balance',
         currentAmount: { brand: '[Alleged: SEVERED: Zoe Invitation brand {}]' },
       }),
-    2000,
+    20,
   );
 
   await t.notThrowsAsync(waitP);