diff --git a/buildTestImages.ts b/buildTestImages.ts
index 223d85ad..aae6bb00 100755
--- a/buildTestImages.ts
+++ b/buildTestImages.ts
@@ -9,5 +9,6 @@ for (const proposal of readProposals()) {
   const { name, target } = imageNameForProposalTest(proposal);
   const cmd = `docker build --tag ${name} --target ${target} .`;
   console.log(cmd);
+  // TODO stream the output
   execSync(cmd);
 }
diff --git a/common.ts b/common.ts
index b0b5cdeb..5efd1f7b 100644
--- a/common.ts
+++ b/common.ts
@@ -13,7 +13,7 @@ type ProposalCommon = {
 
 export type SoftwareUpgradeProposal = ProposalCommon & {
   sdkVersion: string;
-  planName?: string;
+  planName: string;
   type: 'Software Upgrade Proposal';
 };
 
diff --git a/makeDockerfile.ts b/makeDockerfile.ts
index 78e9f4c8..c409a91f 100755
--- a/makeDockerfile.ts
+++ b/makeDockerfile.ts
@@ -1,9 +1,14 @@
 #!/usr/bin/env tsx
 // @ts-check
 
+import assert from 'node:assert';
 import fs from 'node:fs';
 import { readProposals } from './common';
-import type { ProposalInfo, SoftwareUpgradeProposal } from './common';
+import type {
+  ProposalInfo,
+  SoftwareUpgradeProposal,
+  CoreEvalProposal,
+} from './common';
 
 const agZeroUpgrade = 'agoric-upgrade-7-2';
 
@@ -51,6 +56,9 @@ SHELL ["/bin/bash", "-c"]
 RUN . ./upgrade-test-scripts/start_to_to.sh
 `;
   },
+  /**
+   * Execute a prepared upgrade
+   */
   EXECUTE({ proposalName, planName, sdkVersion }: SoftwareUpgradeProposal) {
     return `
 # EXECUTE ${proposalName}
@@ -66,10 +74,27 @@ SHELL ["/bin/bash", "-c"]
 RUN . ./upgrade-test-scripts/start_to_to.sh
 `;
   },
-  USE({ proposalName, proposalIdentifier }: ProposalInfo) {
+  /**
+   * Run a core-eval proposal
+   */
+  EVAL(
+    { proposalIdentifier, proposalName }: CoreEvalProposal,
+    lastProposal: ProposalInfo,
+  ) {
+    return `
+# EVAL ${proposalName}
+FROM use-${lastProposal.proposalName} as eval-${proposalName}
+
+WORKDIR /usr/src/agoric-sdk/upgrade-test-scripts/
+RUN ./run_eval.sh ${proposalIdentifier}:${proposalName}
+`;
+  },
+  USE({ proposalName, proposalIdentifier, type }: ProposalInfo) {
+    const previousStage =
+      type === 'Software Upgrade Proposal' ? 'execute' : 'eval';
     return `
 # USE ${proposalName}
-FROM execute-${proposalName} as use-${proposalName}
+FROM ${previousStage}-${proposalName} as use-${proposalName}
 
 COPY ./proposals/package.json /usr/src/proposals/
 COPY --chmod=755 ./proposals/${proposalIdentifier}:${proposalName}/* /usr/src/proposals/${proposalIdentifier}:${proposalName}/
@@ -110,16 +135,18 @@ for (const proposal of readProposals()) {
     `#----------------\n# ${proposal.proposalName}\n#----------------`,
   );
 
-  // handle the first proposal specially
-  if (previousProposal) {
-    blocks.push(stage.PREPARE(proposal, previousProposal));
-  } else {
-    if (!proposal.planName) {
-      throw new Error('first proposal must have a planName');
+  if (proposal.type === '/agoric.swingset.CoreEvalProposal') {
+    blocks.push(stage.EVAL(proposal, previousProposal!));
+  } else if (proposal.type === 'Software Upgrade Proposal') {
+    // handle the first proposal specially
+    if (previousProposal) {
+      blocks.push(stage.PREPARE(proposal, previousProposal));
+    } else {
+      blocks.push(stage.START(proposal.proposalName, proposal.planName));
     }
-    blocks.push(stage.START(proposal.proposalName, proposal.planName));
+    blocks.push(stage.EXECUTE(proposal));
   }
-  blocks.push(stage.EXECUTE(proposal));
+
   blocks.push(stage.USE(proposal));
   blocks.push(stage.TEST(proposal));
   previousProposal = proposal;
diff --git a/proposals/34:upgrade-10/actions.js b/proposals/34:upgrade-10/actions.js
index 96452abf..2ec871e8 100644
--- a/proposals/34:upgrade-10/actions.js
+++ b/proposals/34:upgrade-10/actions.js
@@ -7,20 +7,20 @@ import {
   agops,
   agopsLocation,
   executeCommand,
-} from '../../upgrade-test-scripts/cliHelper.js';
+} from '../../upgrade-test-scripts/lib/cliHelper.js';
 import {
   HOME,
   ATOM_DENOM,
   GOV1ADDR,
   GOV2ADDR,
   GOV3ADDR,
-} from '../../upgrade-test-scripts/constants.js';
+} from '../../upgrade-test-scripts/lib/constants.js';
 import {
   waitForBlock,
   executeOffer,
   getUser,
   provisionSmartWallet,
-} from '../../upgrade-test-scripts/commonUpgradeHelpers.js';
+} from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 
 const govAccounts = [GOV1ADDR, GOV2ADDR, GOV3ADDR];
 
diff --git a/proposals/34:upgrade-10/performActions.js b/proposals/34:upgrade-10/performActions.js
index 5cc8e4a9..75d8b663 100644
--- a/proposals/34:upgrade-10/performActions.js
+++ b/proposals/34:upgrade-10/performActions.js
@@ -8,13 +8,20 @@ import {
   raiseDebtCeiling,
   pushPrice,
 } from './actions.js';
-import { agd, agoric, agops } from '../../upgrade-test-scripts/cliHelper.js';
-import { GOV1ADDR, GOV2ADDR } from '../../upgrade-test-scripts/constants.js';
+import {
+  agd,
+  agoric,
+  agops,
+} from '../../upgrade-test-scripts/lib/cliHelper.js';
+import {
+  GOV1ADDR,
+  GOV2ADDR,
+} from '../../upgrade-test-scripts/lib/constants.js';
 import {
   getUser,
   newOfferId,
   waitForBlock,
-} from '../../upgrade-test-scripts/commonUpgradeHelpers.js';
+} from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 import { submitDeliverInbound } from './upgradeHelpers.js';
 import {
   openVault,
diff --git a/proposals/34:upgrade-10/post.test.js b/proposals/34:upgrade-10/post.test.js
index 3a914b9e..873cf394 100644
--- a/proposals/34:upgrade-10/post.test.js
+++ b/proposals/34:upgrade-10/post.test.js
@@ -1,13 +1,13 @@
 import test from 'ava';
 
-import { agd, agoric } from '../../upgrade-test-scripts/cliHelper.js';
+import { agd, agoric } from '../../upgrade-test-scripts/lib/cliHelper.js';
 import {
   GOV1ADDR,
   GOV2ADDR,
   GOV3ADDR,
   USER1ADDR,
-} from '../../upgrade-test-scripts/constants.js';
-import { calculateWalletState } from '../../upgrade-test-scripts/commonUpgradeHelpers.js';
+} from '../../upgrade-test-scripts/lib/constants.js';
+import { calculateWalletState } from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 
 test('DeliverInbound from un-provisioned account is discarded', async t => {
   const result = await agd.query('swingset', 'mailbox', USER1ADDR);
diff --git a/proposals/34:upgrade-10/pre.test.js b/proposals/34:upgrade-10/pre.test.js
index 2ad0cc25..0e17e943 100644
--- a/proposals/34:upgrade-10/pre.test.js
+++ b/proposals/34:upgrade-10/pre.test.js
@@ -2,19 +2,23 @@ import test from 'ava';
 
 import { promises as fs } from 'fs';
 
-import { agd, agoric, agops } from '../../upgrade-test-scripts/cliHelper.js';
+import {
+  agd,
+  agoric,
+  agops,
+} from '../../upgrade-test-scripts/lib/cliHelper.js';
 
 import {
   GOV1ADDR,
   GOV2ADDR,
   GOV3ADDR,
   PSM_PAIR,
-} from '../../upgrade-test-scripts/constants.js';
+} from '../../upgrade-test-scripts/lib/constants.js';
 import { openVault } from '../../upgrade-test-scripts/econHelpers.js';
 import {
   getUser,
   waitForBlock,
-} from '../../upgrade-test-scripts/commonUpgradeHelpers.js';
+} from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 
 test.before(async () => {
   console.log('Wait for upgrade to settle');
diff --git a/proposals/34:upgrade-10/upgradeHelpers.js b/proposals/34:upgrade-10/upgradeHelpers.js
index daeb2916..14817083 100644
--- a/proposals/34:upgrade-10/upgradeHelpers.js
+++ b/proposals/34:upgrade-10/upgradeHelpers.js
@@ -8,10 +8,10 @@ import {
   VALIDATORADDR,
   USER1ADDR,
   CHAINID,
-} from '../../upgrade-test-scripts/constants.js';
+} from '../../upgrade-test-scripts/lib/constants.js';
 
-import { agd } from '../../upgrade-test-scripts/cliHelper.js';
-import { getUser } from '../../upgrade-test-scripts/commonUpgradeHelpers.js';
+import { agd } from '../../upgrade-test-scripts/lib/cliHelper.js';
+import { getUser } from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 
 export const printKeys = async () => {
   console.log('========== GOVERNANCE KEYS ==========');
diff --git a/proposals/43:upgrade-11/performActions.js b/proposals/43:upgrade-11/performActions.js
index 6b4782a8..2c389fb6 100644
--- a/proposals/43:upgrade-11/performActions.js
+++ b/proposals/43:upgrade-11/performActions.js
@@ -3,8 +3,8 @@
 // FIXME get TypeScript to resolve these, probably with lib:ES2022
 import assert from 'node:assert/strict';
 
-import { agoric, agops } from '../../upgrade-test-scripts/cliHelper.js';
-import { GOV1ADDR } from '../../upgrade-test-scripts/constants.js';
+import { agoric, agops } from '../../upgrade-test-scripts/lib/cliHelper.js';
+import { GOV1ADDR } from '../../upgrade-test-scripts/lib/constants.js';
 import {
   openVault,
   adjustVault,
diff --git a/proposals/43:upgrade-11/pre.test.js b/proposals/43:upgrade-11/pre.test.js
index 3dc9f3a2..9b704134 100644
--- a/proposals/43:upgrade-11/pre.test.js
+++ b/proposals/43:upgrade-11/pre.test.js
@@ -1,7 +1,7 @@
 import test from 'ava';
 
-import { agd, agoric } from '../../upgrade-test-scripts/cliHelper.js';
-import { waitForBlock } from '../../upgrade-test-scripts/commonUpgradeHelpers.js';
+import { agd, agoric } from '../../upgrade-test-scripts/lib/cliHelper.js';
+import { waitForBlock } from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 
 test.before(async () => {
   console.log('Wait for upgrade to settle');
diff --git a/proposals/55:stATOM-vaults/add-collateral.test.js b/proposals/55:stATOM-vaults/add-collateral.test.js
index 06225faa..3a385a02 100644
--- a/proposals/55:stATOM-vaults/add-collateral.test.js
+++ b/proposals/55:stATOM-vaults/add-collateral.test.js
@@ -9,10 +9,14 @@ import dbOpenAmbient from 'better-sqlite3';
 import { tmpName as tmpNameAmbient } from 'tmp';
 import { ZipReader } from '@endo/zip';
 
-import { makeFileRW, makeWebCache, makeWebRd } from '../lib/webAsset.js';
-import { makeAgd } from '../lib/agd-lib.js';
-import { dbTool } from '../lib/vat-status.js';
-import { voteLatestProposalAndWait } from '../lib/commonUpgradeHelpers.js';
+import {
+  makeFileRW,
+  makeWebCache,
+  makeWebRd,
+} from '../../upgrade-test-scripts/lib/webAsset.js';
+import { makeAgd } from '../../upgrade-test-scripts/lib/agd-lib.js';
+import { dbTool } from '../../upgrade-test-scripts/lib/vat-status.js';
+import { voteLatestProposalAndWait } from '../../upgrade-test-scripts/lib/commonUpgradeHelpers.js';
 import {
   bundleDetail,
   ensureISTForInstall,
@@ -22,7 +26,10 @@ import {
   testIncludes,
   txAbbr,
 } from './core-eval-support.js';
-import { agoric, wellKnownIdentities } from '../lib/cliHelper.js';
+import {
+  agoric,
+  wellKnownIdentities,
+} from '../../upgrade-test-scripts/lib/cliHelper.js';
 
 /** @typedef {Awaited<ReturnType<typeof makeTestContext>>} TestContext */
 /** @type {import('ava').TestFn<TestContext>}} */
@@ -222,7 +229,7 @@ test.serial('core eval not permitted to add/replace installations', async t => {
   }
 });
 
-test.serial('save installations before the poposal', async t => {
+test.serial('save installations before the proposal', async t => {
   const { agoric, before } = t.context;
   const { installation } = await wellKnownIdentities({ agoric });
   t.log(installation.priceAggregator);
@@ -332,14 +339,3 @@ test.serial('priceAuthority installation was not changed', async t => {
   t.log({ expected, actual });
   t.deepEqual(actual, expected);
 });
-
-// needs synchronization
-test.skip('stATOM-USD price feed instance in agoricNames', async t => {
-  const { agoric } = t.context;
-  const { instance } = await wellKnownIdentities({ agoric });
-  testIncludes(t, 'stATOM-USD price feed', Object.keys(instance), 'instance');
-});
-
-test.todo('manager in vstorage');
-test.todo('price feed in vstorage - after setting prices');
-test.todo('create a vault as dapp-inter does');
diff --git a/proposals/55:stATOM-vaults/core-eval-support.js b/proposals/55:stATOM-vaults/core-eval-support.js
index 48ebac20..61910552 100644
--- a/proposals/55:stATOM-vaults/core-eval-support.js
+++ b/proposals/55:stATOM-vaults/core-eval-support.js
@@ -1,11 +1,15 @@
 // @ts-check
-import { Far, makeMarshal, makeTranslationTable } from '../lib/unmarshal.js';
-import { Fail, NonNullish } from '../lib/assert.js';
+import {
+  Far,
+  makeMarshal,
+  makeTranslationTable,
+} from '../../upgrade-test-scripts/lib/unmarshal.js';
+import { Fail, NonNullish } from '../../upgrade-test-scripts/lib/assert.js';
 
 // TODO: factor out ambient authority from these
 // or at least allow caller to supply authority.
-import { mintIST } from '../lib/econHelpers.js';
-import { agoric } from '../lib/cliHelper.js';
+import { mintIST } from '../../upgrade-test-scripts/lib/econHelpers.js';
+import { agoric } from '../../upgrade-test-scripts/lib/cliHelper.js';
 
 // move to unmarshal.js?
 const makeBoardUnmarshal = () => {
diff --git a/proposals/55:statom-vaults/config.json b/proposals/55:statom-vaults/config.json
new file mode 100644
index 00000000..8acfb07d
--- /dev/null
+++ b/proposals/55:statom-vaults/config.json
@@ -0,0 +1,3 @@
+{
+    "type": "/agoric.swingset.CoreEvalProposal"
+}
diff --git a/proposals/55:statom-vaults/eval.sh b/proposals/55:statom-vaults/eval.sh
new file mode 100644
index 00000000..f3427c88
--- /dev/null
+++ b/proposals/55:statom-vaults/eval.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Exit when any command fails
+set -e
+
+source /usr/src/agoric-sdk/upgrade-test-scripts/env_setup.sh
+
+ls -al
+
+yarn install
+
+yarn ava 55:stATOM-vaults/add-collateral.test.js
diff --git a/proposals/55:statom-vaults/test.sh b/proposals/55:statom-vaults/test.sh
new file mode 100644
index 00000000..76a8c694
--- /dev/null
+++ b/proposals/55:statom-vaults/test.sh
@@ -0,0 +1,4 @@
+# TODO stATOM-USD price feed instance in agoricNames
+# TODO manager in vstorage
+# TODO price feed in vstorage - after setting prices
+# TODO create a vault as dapp-inter does
diff --git a/upgrade-test-scripts/run_eval.sh b/upgrade-test-scripts/run_eval.sh
new file mode 100644
index 00000000..685691cc
--- /dev/null
+++ b/upgrade-test-scripts/run_eval.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+# Starts agd in the background and runs eval.sh against it in the foreground
+# Note that STDOUT mixes the two. TODO separate them cleanly with log output.
+
+set -e
+set -x
+
+source ./env_setup.sh
+
+export SLOGFILE=slog.slog
+
+PROPOSAL_PATH=$1
+
+startAgd
+
+echo "Agd started. Running eval.sh."
+cd /usr/src/proposals/"$PROPOSAL_PATH/" || exit
+./eval.sh
+
+echo "Eval completed. Running 10 blocks and exiting."
+waitForBlock 10