diff --git a/packages/inter-protocol/test/psm/gov-replace-committee.js b/packages/inter-protocol/test/psm/gov-replace-committee.js
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+++ b/packages/inter-protocol/test/psm/gov-replace-committee.js
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+/* global E */
+// @ts-nocheck
+/** @file Script to replace the econ governance committee in a SwingSet Core Eval (aka big hammer) */
+
+import { E } from '@endo/eventual-send';
+
+const { details: X } = assert;
+
+const runConfig = {
+  committeeName: 'Economic Committee',
+  economicCommitteeAddresses: {
+    gov1: 'agoric1ldmtatp24qlllgxmrsjzcpe20fvlkp448zcuce',
+    gov2: 'agoric140dmkrz2e42ergjj7gyvejhzmjzurvqeq82ang',
+    gov3: 'agoric1w8wktaur4zf8qmmtn3n7x3r0jhsjkjntcm3u6h',
+  },
+};
+
+// #region Quasi-imports
+const trace = (...args) => console.log('GovReplaceCommitee', ...args);
+
+/**
+ * Convenience function for returning a storage node at or under its input,
+ * falling back to an inert object with the correct interface (but incomplete
+ * behavior) when that is unavailable.
+ *
+ * @param {ERef<StorageNode>} storageNodeRef
+ * @param {string} childName
+ * @returns {Promise<StorageNode>}
+ */
+export async function makeStorageNodeChild(storageNodeRef, childName) {
+  return E(storageNodeRef).makeChildNode(childName);
+}
+
+// TODO: Formalize segment constraints.
+// Must be nonempty and disallow (unescaped) `.`, and for simplicity
+// (and future possibility of e.g. escaping) we currently limit to
+// ASCII alphanumeric plus underscore and dash.
+const pathSegmentPattern = /^[a-zA-Z0-9_-]{1,100}$/;
+
+/** @type {(name: string) => void} */
+export const assertPathSegment = name => {
+  pathSegmentPattern.test(name) ||
+    assert.fail(
+      X`Path segment names must consist of 1 to 100 characters limited to ASCII alphanumerics, underscores, and/or dashes: ${name}`,
+    );
+};
+harden(assertPathSegment);
+
+/** @type {(name: string) => string} */
+const sanitizePathSegment = name => {
+  const candidate = name.replace(/[ ,]/g, '_');
+  assertPathSegment(candidate);
+  return candidate;
+};
+
+// #endregion
+
+/**
+ * @param {import('../../src/proposals/startPSM.js').EconomyBootstrapPowers} powers
+ * @returns {Invitation} new poser invitation
+ */
+export const startNewEconomicCommittee = async ({
+  consume: { board, chainStorage, zoe },
+  produce: { economicCommitteeCreatorFacet },
+  installation: {
+    consume: { committee },
+  },
+}) => {
+  const COMMITTEES_ROOT = 'committees';
+  trace('startNewEconomicCommittee');
+  const { committeeName } = runConfig;
+  const committeeSize = Object.values(
+    runConfig.economicCommitteeAddresses,
+  ).length;
+
+  const committeesNode = await makeStorageNodeChild(
+    chainStorage,
+    COMMITTEES_ROOT,
+  );
+  const storageNode = await E(committeesNode).makeChildNode(
+    sanitizePathSegment(committeeName),
+  );
+
+  // NB: committee must only publish what it intended to be public
+  const marshaller = await E(board).getPublishingMarshaller();
+
+  // ??? save in promise space?
+  const { creatorFacet } = await E(zoe).startInstance(
+    committee, // aka electorate
+    {},
+    { committeeName, committeeSize },
+    {
+      storageNode,
+      marshaller,
+    },
+  );
+
+  const newPoserInvitationP = E(creatorFacet).getPoserInvitation();
+
+  // TODO reset the values in space
+  // economicCommitteeCreatorFacet.resolve(creatorFacet);
+  return newPoserInvitationP;
+};
+harden(startNewEconomicCommittee);
+
+/** @param {import('../../src/proposals/econ-behaviors.js').EconomyBootstrapSpace} permittedPowers see gov-add-psm-permit.json */
+const main = async permittedPowers => {
+  console.log('starting new economic committee:', runConfig);
+  const newElectoratePoser = await startNewEconomicCommittee(permittedPowers);
+
+  /*
+   * put the new economic committee into agoricNames
+   */
+
+  /*
+   * tell all the PSM contracts about it
+   */
+  const psmFacetsMap = await permittedPowers.consume.psmFacets;
+  // TODO make sure new PSMs get this committee (using ".reset" in the space?)
+  const replacements = [...psmFacetsMap.values()].map(psmFacets =>
+    psmFacets.psmGovernorCreatorFacet.replaceElectorate(newElectoratePoser),
+  );
+  await Promise.all(replacements);
+
+  // somethign with the PSM charter?
+
+  /*
+   * tell the provisionPool contract about it
+   */
+
+  // done
+  console.log('installed new economic committee');
+};
+
+/**
+ * How to test on chain
+ *
+ * Execute core eval with a dictorator (electorate n=1)
+ * Have the old electorate and new electorate vote for different PSM param changes
+ * Verify the old's were ignored and the new's were enacted
+ */
+
+// "export" from script
+main;