diff --git a/packages/boot/package.json b/packages/boot/package.json
index 88f80edfc16..db0c04e4b79 100644
--- a/packages/boot/package.json
+++ b/packages/boot/package.json
@@ -19,9 +19,9 @@
   "author": "Agoric",
   "license": "Apache-2.0",
   "dependencies": {
+    "@agoric/builders": "^0.1.0",
     "@agoric/ertp": "^0.16.2",
     "@agoric/internal": "^0.3.2",
-    "@agoric/builders": "^0.1.0",
     "@agoric/vat-data": "^0.5.2",
     "@agoric/vats": "^0.15.1",
     "@agoric/vm-config": "^0.1.0",
@@ -48,7 +48,8 @@
     "@agoric/swingset-vat": "^0.32.2",
     "@agoric/time": "^0.3.2",
     "ava": "^5.3.0",
-    "c8": "^7.13.0"
+    "c8": "^7.13.0",
+    "tsx": "^3.12.8"
   },
   "files": [
     "CHANGELOG.md",
@@ -63,8 +64,17 @@
     "node": ">=14.15.0"
   },
   "ava": {
+    "extensions": {
+      "js": true,
+      "ts": "module"
+    },
     "files": [
-      "test/**/test-*.js"
+      "test/**/test-*.js",
+      "test/**/test-*.ts"
+    ],
+    "nodeArguments": [
+      "--loader=tsx",
+      "--no-warnings"
     ],
     "require": [
       "@endo/init/debug.js"
diff --git a/packages/boot/test/bootstrapTests/bench-vaults-performance.js b/packages/boot/test/bootstrapTests/bench-vaults-performance.js
index 5b54dd38a17..a7553154ae9 100644
--- a/packages/boot/test/bootstrapTests/bench-vaults-performance.js
+++ b/packages/boot/test/bootstrapTests/bench-vaults-performance.js
@@ -12,8 +12,8 @@ import engineGC from '@agoric/internal/src/lib-nodejs/engine-gc.js';
 
 import { eventLoopIteration } from '@agoric/internal/src/testing-utils.js';
 import { makeAgoricNamesRemotesFromFakeStorage } from '@agoric/vats/tools/board-utils.js';
-import { makeSwingsetTestKit } from './supports.js';
-import { makeWalletFactoryDriver } from './drivers.js';
+import { makeSwingsetTestKit } from './supports.ts';
+import { makeWalletFactoryDriver } from './drivers.ts';
 
 /**
  * @type {import('ava').TestFn<
diff --git a/packages/boot/test/bootstrapTests/bench-vaults-stripped.js b/packages/boot/test/bootstrapTests/bench-vaults-stripped.js
index 9f97b21aad7..0fa7cac3e7c 100644
--- a/packages/boot/test/bootstrapTests/bench-vaults-stripped.js
+++ b/packages/boot/test/bootstrapTests/bench-vaults-stripped.js
@@ -8,8 +8,8 @@ import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 
 import { eventLoopIteration } from '@agoric/internal/src/testing-utils.js';
 import { makeAgoricNamesRemotesFromFakeStorage } from '@agoric/vats/tools/board-utils.js';
-import { makeSwingsetTestKit } from './supports.js';
-import { makeWalletFactoryDriver } from './drivers.js';
+import { makeSwingsetTestKit } from './supports.ts';
+import { makeWalletFactoryDriver } from './drivers.ts';
 
 // presently all these tests use one collateral manager
 const collateralBrandKey = 'ATOM';
diff --git a/packages/boot/test/bootstrapTests/drivers.js b/packages/boot/test/bootstrapTests/drivers.ts
similarity index 72%
rename from packages/boot/test/bootstrapTests/drivers.js
rename to packages/boot/test/bootstrapTests/drivers.ts
index 2956d086dc2..72d3c5bacfd 100644
--- a/packages/boot/test/bootstrapTests/drivers.js
+++ b/packages/boot/test/bootstrapTests/drivers.ts
@@ -1,50 +1,55 @@
-// @ts-check
+/* eslint-disable jsdoc/require-param */
 import { Fail, NonNullish } from '@agoric/assert';
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import { SECONDS_PER_MINUTE } from '@agoric/inter-protocol/src/proposals/econ-behaviors.js';
 import { unmarshalFromVstorage } from '@agoric/internal/src/marshal.js';
-import { slotToRemotable } from '@agoric/internal/src/storage-test-utils.js';
+import {
+  FakeStorageKit,
+  slotToRemotable,
+} from '@agoric/internal/src/storage-test-utils.js';
 import { instanceNameFor } from '@agoric/inter-protocol/src/proposals/price-feed-proposal.js';
 
-import { boardSlottingMarshaller } from '@agoric/vats/tools/board-utils.js';
+import {
+  AgoricNamesRemotes,
+  boardSlottingMarshaller,
+} from '@agoric/vats/tools/board-utils.js';
+import type {
+  CurrentWalletRecord,
+  SmartWallet,
+  UpdateRecord,
+} from '@agoric/smart-wallet/src/smartWallet.js';
+import type { WalletFactoryStartResult } from '@agoric/vats/src/core/startWalletFactory.js';
+import type { OfferSpec } from '@agoric/smart-wallet/src/offers.js';
+import type { TimerService } from '@agoric/time/src/types.js';
+import type { OfferMaker } from '@agoric/smart-wallet/src/types.js';
+import type { RunUtils, SwingsetTestKit } from './supports.ts';
 
-/**
- * @param {ReturnType<typeof import('./supports.js').makeRunUtils>} runUtils
- * @param {import('@agoric/internal/src/storage-test-utils.js').FakeStorageKit} storage
- * @param {import('@agoric/vats/tools/board-utils.js').AgoricNamesRemotes} agoricNamesRemotes
- */
 export const makeWalletFactoryDriver = async (
-  runUtils,
-  storage,
-  agoricNamesRemotes,
+  runUtils: RunUtils,
+  storage: FakeStorageKit,
+  agoricNamesRemotes: AgoricNamesRemotes,
 ) => {
   const { EV } = runUtils;
 
-  /** @type {import('@agoric/vats/src/core/startWalletFactory.js').WalletFactoryStartResult} */
-  const walletFactoryStartResult = await EV.vat('bootstrap').consumeItem(
-    'walletFactoryStartResult',
-  );
-  /** @type {ERef<BankManager>} */
-  const bankManager = await EV.vat('bootstrap').consumeItem('bankManager');
+  const walletFactoryStartResult: WalletFactoryStartResult = await EV.vat(
+    'bootstrap',
+  ).consumeItem('walletFactoryStartResult');
+  const bankManager: ERef<BankManager> =
+    await EV.vat('bootstrap').consumeItem('bankManager');
   const namesByAddressAdmin = await EV.vat('bootstrap').consumeItem(
     'namesByAddressAdmin',
   );
 
   const marshaller = boardSlottingMarshaller(slotToRemotable);
 
-  /**
-   * @param {string} walletAddress
-   * @param {import('@agoric/smart-wallet/src/smartWallet.js').SmartWallet} walletPresence
-   * @param {boolean} isNew
-   */
-  const makeWalletDriver = (walletAddress, walletPresence, isNew) => ({
+  const makeWalletDriver = (
+    walletAddress: string,
+    walletPresence: SmartWallet,
+    isNew: boolean,
+  ) => ({
     isNew,
 
-    /**
-     * @param {import('@agoric/smart-wallet/src/offers.js').OfferSpec} offer
-     * @returns {Promise<void>}
-     */
-    executeOffer(offer) {
+    executeOffer(offer: OfferSpec): Promise<void> {
       const offerCapData = marshaller.toCapData(
         harden({
           method: 'executeOffer',
@@ -53,11 +58,7 @@ export const makeWalletFactoryDriver = async (
       );
       return EV(walletPresence).handleBridgeAction(offerCapData, true);
     },
-    /**
-     * @param {import('@agoric/smart-wallet/src/offers.js').OfferSpec} offer
-     * @returns {Promise<void>}
-     */
-    sendOffer(offer) {
+    sendOffer(offer: OfferSpec): Promise<void> {
       const offerCapData = marshaller.toCapData(
         harden({
           method: 'executeOffer',
@@ -67,8 +68,7 @@ export const makeWalletFactoryDriver = async (
 
       return EV.sendOnly(walletPresence).handleBridgeAction(offerCapData, true);
     },
-    /** @param {string} offerId */
-    tryExitOffer(offerId) {
+    tryExitOffer(offerId: string) {
       const capData = marshaller.toCapData(
         harden({
           method: 'tryExitOffer',
@@ -77,33 +77,24 @@ export const makeWalletFactoryDriver = async (
       );
       return EV(walletPresence).handleBridgeAction(capData, true);
     },
-    /**
-     * @template {import('@agoric/smart-wallet/src/types.js').OfferMaker} M
-     *   offer maker function
-     * @param {M} makeOffer
-     * @param {Parameters<M>[1]} firstArg
-     * @param {Parameters<M>[2]} [secondArg]
-     * @returns {Promise<void>}
-     */
-    executeOfferMaker(makeOffer, firstArg, secondArg) {
+    executeOfferMaker<M extends OfferMaker>(
+      makeOffer: M,
+      firstArg: Parameters<M>[1],
+      secondArg?: Parameters<M>[2],
+    ): Promise<void> {
       const offer = makeOffer(agoricNamesRemotes, firstArg, secondArg);
       return this.executeOffer(offer);
     },
-    /**
-     * @template {import('@agoric/smart-wallet/src/types.js').OfferMaker} M
-     *   offer maker function
-     * @param {M} makeOffer
-     * @param {Parameters<M>[1]} firstArg
-     * @param {Parameters<M>[2]} [secondArg]
-     * @returns {Promise<void>}
-     */
-    sendOfferMaker(makeOffer, firstArg, secondArg) {
+    sendOfferMaker<M extends OfferMaker>(
+      makeOffer: M,
+      firstArg: Parameters<M>[1],
+      secondArg?: Parameters<M>[2],
+    ): Promise<void> {
       const offer = makeOffer(agoricNamesRemotes, firstArg, secondArg);
       return this.sendOffer(offer);
     },
 
-    /** @returns {import('@agoric/smart-wallet/src/smartWallet.js').CurrentWalletRecord} */
-    getCurrentWalletRecord() {
+    getCurrentWalletRecord(): CurrentWalletRecord {
       const fromCapData = (...args) =>
         Reflect.apply(marshaller.fromCapData, marshaller, args);
       return unmarshalFromVstorage(
@@ -114,8 +105,7 @@ export const makeWalletFactoryDriver = async (
       );
     },
 
-    /** @returns {import('@agoric/smart-wallet/src/smartWallet.js').UpdateRecord} */
-    getLatestUpdateRecord() {
+    getLatestUpdateRecord(): UpdateRecord {
       const fromCapData = (...args) =>
         Reflect.apply(marshaller.fromCapData, marshaller, args);
       return unmarshalFromVstorage(
@@ -130,11 +120,10 @@ export const makeWalletFactoryDriver = async (
   return {
     /**
      * Skip the provisionPool for tests
-     *
-     * @param {string} walletAddress
-     * @returns {Promise<ReturnType<typeof makeWalletDriver>>}
      */
-    async provideSmartWallet(walletAddress) {
+    async provideSmartWallet(
+      walletAddress: string,
+    ): Promise<ReturnType<typeof makeWalletDriver>> {
       const bank = await EV(bankManager).getBankForAddress(walletAddress);
       return EV(walletFactoryStartResult.creatorFacet)
         .provideSmartWallet(walletAddress, bank, namesByAddressAdmin)
@@ -144,18 +133,15 @@ export const makeWalletFactoryDriver = async (
     },
   };
 };
+export type WalletFactoryDriver = Awaited<
+  ReturnType<typeof makeWalletFactoryDriver>
+>;
 
-/**
- * @param {string} collateralBrandKey
- * @param {import('@agoric/vats/tools/board-utils.js').AgoricNamesRemotes} agoricNamesRemotes
- * @param {Awaited<ReturnType<typeof makeWalletFactoryDriver>>} walletFactoryDriver
- * @param {string[]} oracleAddresses
- */
 export const makePriceFeedDriver = async (
-  collateralBrandKey,
-  agoricNamesRemotes,
-  walletFactoryDriver,
-  oracleAddresses,
+  collateralBrandKey: string,
+  agoricNamesRemotes: AgoricNamesRemotes,
+  walletFactoryDriver: WalletFactoryDriver,
+  oracleAddresses: string[],
 ) => {
   const priceFeedName = instanceNameFor(collateralBrandKey, 'USD');
 
@@ -185,8 +171,7 @@ export const makePriceFeedDriver = async (
   // zero is the initial lastReportedRoundId so causes an error: cannot report on previous rounds
   let roundId = 1n;
   return {
-    /** @param {number} price */
-    async setPrice(price) {
+    async setPrice(price: number) {
       await Promise.all(
         oracleWallets.map(w =>
           w.executeOfferMaker(
@@ -208,26 +193,17 @@ export const makePriceFeedDriver = async (
   };
 };
 
-/** @typedef {Awaited<ReturnType<import('./supports.js').makeSwingsetTestKit>>} SwingsetTestKit */
-
-/**
- * @param {SwingsetTestKit} testKit
- * @param {import('@agoric/vats/tools/board-utils.js').AgoricNamesRemotes} agoricNamesRemotes
- * @param {Awaited<ReturnType<typeof makeWalletFactoryDriver>>} walletFactoryDriver
- * @param {string[]} committeeAddresses
- */
 export const makeGovernanceDriver = async (
-  testKit,
-  agoricNamesRemotes,
-  walletFactoryDriver,
-  committeeAddresses,
+  testKit: SwingsetTestKit,
+  agoricNamesRemotes: AgoricNamesRemotes,
+  walletFactoryDriver: WalletFactoryDriver,
+  committeeAddresses: string[],
 ) => {
   const { EV } = testKit.runUtils;
   const charterMembershipId = 'charterMembership';
   const committeeMembershipId = 'committeeMembership';
 
-  /** @type {ERef<import('@agoric/time/src/types.js').TimerService>} */
-  const chainTimerService =
+  const chainTimerService: ERef<TimerService> =
     await EV.vat('bootstrap').consumeItem('chainTimerService');
 
   let invitationsAccepted = false;
@@ -327,12 +303,7 @@ export const makeGovernanceDriver = async (
   };
 
   return {
-    /**
-     * @param {Instance} instance
-     * @param {object} params
-     * @param {object} [path]
-     */
-    async changeParams(instance, params, path) {
+    async changeParams(instance: Instance, params: Object, path?: object) {
       instance || Fail`missing instance`;
       await ensureInvitationsAccepted();
       await proposeParams(instance, params, path);
@@ -342,8 +313,7 @@ export const makeGovernanceDriver = async (
   };
 };
 
-/** @param {SwingsetTestKit} testKit */
-export const makeZoeDriver = async testKit => {
+export const makeZoeDriver = async (testKit: SwingsetTestKit) => {
   const { EV } = testKit.runUtils;
   const zoe = await EV.vat('bootstrap').consumeItem('zoe');
   const chainStorage = await EV.vat('bootstrap').consumeItem('chainStorage');
diff --git a/packages/boot/test/bootstrapTests/liquidation.js b/packages/boot/test/bootstrapTests/liquidation.ts
similarity index 86%
rename from packages/boot/test/bootstrapTests/liquidation.js
rename to packages/boot/test/bootstrapTests/liquidation.ts
index 6eabe517aec..3d54bb6dc58 100644
--- a/packages/boot/test/bootstrapTests/liquidation.js
+++ b/packages/boot/test/bootstrapTests/liquidation.ts
@@ -3,13 +3,16 @@ import {
   SECONDS_PER_HOUR,
   SECONDS_PER_MINUTE,
 } from '@agoric/inter-protocol/src/proposals/econ-behaviors.js';
-import { makeAgoricNamesRemotesFromFakeStorage } from '@agoric/vats/tools/board-utils.js';
+import {
+  AgoricNamesRemotes,
+  makeAgoricNamesRemotesFromFakeStorage,
+} from '@agoric/vats/tools/board-utils.js';
 import {
   makeGovernanceDriver,
   makePriceFeedDriver,
   makeWalletFactoryDriver,
-} from './drivers.js';
-import { makeSwingsetTestKit } from './supports.js';
+} from './drivers.ts';
+import { makeSwingsetTestKit } from './supports.ts';
 
 export const scale6 = x => BigInt(Math.round(x * 1_000_000));
 
@@ -39,10 +42,8 @@ export const makeLiquidationTestContext = async t => {
   console.timeLog('DefaultTestContext', 'vaultFactoryKit');
 
   // has to be late enough for agoricNames data to have been published
-  /** @type {import('@agoric/vats/tools/board-utils.js').AgoricNamesRemotes} */
-  const agoricNamesRemotes = makeAgoricNamesRemotesFromFakeStorage(
-    swingsetTestKit.storage,
-  );
+  const agoricNamesRemotes: AgoricNamesRemotes =
+    makeAgoricNamesRemotesFromFakeStorage(swingsetTestKit.storage);
   const refreshAgoricNamesRemotes = () => {
     Object.assign(
       agoricNamesRemotes,
@@ -72,24 +73,22 @@ export const makeLiquidationTestContext = async t => {
   );
   console.timeLog('DefaultTestContext', 'governanceDriver');
 
-  /**
-   * @type {Record<
-   *   string,
-   *   Awaited<ReturnType<typeof makePriceFeedDriver>>
-   * >}
-   */
-  const priceFeedDrivers = {};
+  const priceFeedDrivers = {} as Record<
+    string,
+    Awaited<ReturnType<typeof makePriceFeedDriver>>
+  >;
 
   console.timeLog('DefaultTestContext', 'priceFeedDriver');
 
   console.timeEnd('DefaultTestContext');
 
-  /**
-   * @param {object} opts
-   * @param {string} opts.collateralBrandKey
-   * @param {number} opts.managerIndex
-   */
-  const setupStartingState = async ({ collateralBrandKey, managerIndex }) => {
+  const setupStartingState = async ({
+    collateralBrandKey,
+    managerIndex,
+  }: {
+    collateralBrandKey: string;
+    managerIndex: number;
+  }) => {
     const managerPath = `published.vaultFactory.managers.manager${managerIndex}`;
     const { advanceTimeBy, readLatest } = swingsetTestKit;
 
@@ -192,12 +191,11 @@ export const makeLiquidationTestContext = async t => {
   };
 
   const check = {
-    /**
-     * @param {number} managerIndex
-     * @param {number} vaultIndex
-     * @param {Record<string, any>} partial
-     */
-    vaultNotification(managerIndex, vaultIndex, partial) {
+    vaultNotification(
+      managerIndex: number,
+      vaultIndex: number,
+      partial: Record<string, any>,
+    ) {
       const { readLatest } = swingsetTestKit;
 
       const notification = readLatest(
@@ -218,3 +216,7 @@ export const makeLiquidationTestContext = async t => {
     walletFactoryDriver,
   };
 };
+
+export type LiquidationTestContext = Awaited<
+  ReturnType<typeof makeLiquidationTestContext>
+>;
diff --git a/packages/boot/test/bootstrapTests/supports.js b/packages/boot/test/bootstrapTests/supports.ts
similarity index 78%
rename from packages/boot/test/bootstrapTests/supports.js
rename to packages/boot/test/bootstrapTests/supports.ts
index f1c8b4fef53..cbf2794cbf6 100644
--- a/packages/boot/test/bootstrapTests/supports.js
+++ b/packages/boot/test/bootstrapTests/supports.ts
@@ -1,43 +1,40 @@
-// @ts-check
+/* eslint-disable jsdoc/require-param-type, jsdoc/require-param, @jessie.js/safe-await-separator */
 /* global process */
 
+import childProcessAmbient from 'child_process';
 import { promises as fsAmbientPromises } from 'fs';
 import { resolve as importMetaResolve } from 'import-meta-resolve';
 import { basename } from 'path';
 import { inspect } from 'util';
-import childProcessAmbient from 'child_process';
 
-import { Fail } from '@agoric/assert';
+import { Fail, NonNullish } from '@agoric/assert';
 import { buildSwingset } from '@agoric/cosmic-swingset/src/launch-chain.js';
-import { BridgeId, makeTracer, VBankAccount } from '@agoric/internal';
+import { BridgeId, VBankAccount, makeTracer } from '@agoric/internal';
 import { unmarshalFromVstorage } from '@agoric/internal/src/marshal.js';
-import { makeFakeStorageKit } from '@agoric/internal/src/storage-test-utils.js';
+import {
+  FakeStorageKit,
+  makeFakeStorageKit,
+} from '@agoric/internal/src/storage-test-utils.js';
 import { initSwingStore } from '@agoric/swing-store';
 import { kunser } from '@agoric/swingset-liveslots/test/kmarshal.js';
 import { loadSwingsetConfigFile } from '@agoric/swingset-vat';
-import { E } from '@endo/eventual-send';
-import { makeQueue } from '@endo/stream';
-import { TimeMath } from '@agoric/time';
+import { TimeMath, Timestamp } from '@agoric/time';
 import {
   boardSlottingMarshaller,
   slotToBoardRemote,
 } from '@agoric/vats/tools/board-utils.js';
+import { makeQueue } from '@endo/stream';
 
-// to retain for ESlint, used by typedef
-E;
+import type { SwingsetController } from '@agoric/swingset-vat/src/controller/controller.js';
+import type { BootstrapRootObject } from '@agoric/vats/src/core/lib-boot';
+import type { ExecutionContext } from 'ava';
+import type { E } from '@endo/eventual-send';
 
 const sink = () => {};
 
 const trace = makeTracer('BSTSupport', false);
 
-/**
- * @typedef {Awaited<
- *   ReturnType<import('@agoric/vats/src/core/lib-boot').makeBootstrap>
- * >} BootstrapRootObject
- */
-
-/** @type {{ [P in keyof BootstrapRootObject]: P }} */
-export const bootstrapMethods = {
+export const bootstrapMethods: { [P in keyof BootstrapRootObject]: P } = {
   bootstrap: 'bootstrap',
   consumeItem: 'consumeItem',
   produceItem: 'produceItem',
@@ -49,50 +46,41 @@ export const bootstrapMethods = {
   snapshotStore: 'snapshotStore',
 };
 
-/**
- * @template {PropertyKey} K
- * @template V
- * @param {K[]} keys
- * @param {(key: K, i: number) => V} valueMaker
- */
-const keysToObject = (keys, valueMaker) => {
+const keysToObject = <K extends PropertyKey, V>(
+  keys: K[],
+  valueMaker: (key: K, i: number) => V,
+) => {
   return Object.fromEntries(keys.map((key, i) => [key, valueMaker(key, i)]));
 };
 
 /**
  * AVA's default t.deepEqual() is nearly unreadable for sorted arrays of
  * strings.
- *
- * @param {{
- *   deepEqual: (a: unknown, b: unknown, message?: string) => void;
- * }} t
- * @param {PropertyKey[]} a
- * @param {PropertyKey[]} b
- * @param {string} [message]
  */
-export const keyArrayEqual = (t, a, b, message) => {
+export const keyArrayEqual = (
+  t: ExecutionContext,
+  a: PropertyKey[],
+  b: PropertyKey[],
+  message?: string,
+) => {
   const aobj = keysToObject(a, () => 1);
   const bobj = keysToObject(b, () => 1);
   return t.deepEqual(aobj, bobj, message);
 };
 
-/**
- * @param {import('@agoric/swingset-vat/src/controller/controller').SwingsetController} controller
- * @param {(..._: any[]) => any} log
- */
-export const makeRunUtils = (controller, log = (..._) => {}) => {
+export const makeRunUtils = (
+  controller: SwingsetController,
+  log = (..._) => {},
+) => {
   let cranksRun = 0;
 
   const mutex = makeQueue();
 
   mutex.put(controller.run());
 
-  /**
-   * @template {() => any} T
-   * @param {T} thunk
-   * @returns {Promise<ReturnType<T>>}
-   */
-  const runThunk = async thunk => {
+  const runThunk = async <T extends () => any>(
+    thunk: T,
+  ): Promise<ReturnType<T>> => {
     try {
       // this promise for the last lock may fail
       await mutex.get();
@@ -111,7 +99,7 @@ export const makeRunUtils = (controller, log = (..._) => {}) => {
     return result;
   };
 
-  const runMethod = async (method, args = []) => {
+  const runMethod = async (method: string, args: object[] = []) => {
     log('runMethod', method, args, 'at', cranksRun);
     assert(Array.isArray(args));
 
@@ -132,15 +120,13 @@ export const makeRunUtils = (controller, log = (..._) => {}) => {
     }
   };
 
-  /**
-   * @type {typeof E & {
-   *   sendOnly: (presence: unknown) => Record<string, (...args: any) => void>;
-   *   vat: (name: string) => Record<string, (...args: any) => Promise<any>>;
-   *   rawBoot: Record<string, (...args: any) => Promise<any>>;
-   * }}
-   */
-  // @ts-expect-error cast, approximate
-  const EV = presence =>
+  type EVProxy = typeof E & {
+    sendOnly: (presence: unknown) => Record<string, (...args: any) => void>;
+    vat: (name: string) => Record<string, (...args: any) => Promise<any>>;
+    rawBoot: Record<string, (...args: any) => Promise<any>>;
+  };
+  // @ts-expect-error XXX casting
+  const EV: EVProxy = presence =>
     new Proxy(harden({}), {
       get: (_t, methodName, _rx) =>
         harden((...args) =>
@@ -151,6 +137,7 @@ export const makeRunUtils = (controller, log = (..._) => {}) => {
     new Proxy(harden({}), {
       get: (_t, methodName, _rx) =>
         harden((...args) => {
+          assert.string(methodName);
           if (name === 'meta') {
             return runMethod(methodName, args);
           }
@@ -159,6 +146,7 @@ export const makeRunUtils = (controller, log = (..._) => {}) => {
     });
   EV.rawBoot = new Proxy(harden({}), {
     get: (_t, methodName, _rx) =>
+      // @ts-expect-error FIXME runMethod takes string but proxy allows symbol
       harden((...args) => runMethod(methodName, args)),
   });
   // @ts-expect-error xxx
@@ -174,7 +162,7 @@ export const makeRunUtils = (controller, log = (..._) => {}) => {
             ]),
       },
     );
-  // @ts-expect-error xxx
+  // @ts-expect-error 'get' is a read-only property
   EV.get = presence =>
     new Proxy(harden({}), {
       get: (_t, pathElement, _rx) =>
@@ -183,6 +171,7 @@ export const makeRunUtils = (controller, log = (..._) => {}) => {
 
   return harden({ runThunk, EV });
 };
+export type RunUtils = ReturnType<typeof makeRunUtils>;
 
 export const getNodeTestVaultsConfig = async (
   bundleDir = 'bundles',
@@ -191,10 +180,9 @@ export const getNodeTestVaultsConfig = async (
   const fullPath = await importMetaResolve(specifier, import.meta.url).then(
     u => new URL(u).pathname,
   );
-  const config = /** @type {SwingSetConfig & { coreProposals?: any[] }} */ (
-    await loadSwingsetConfigFile(fullPath)
+  const config: SwingSetConfig & { coreProposals?: any[] } = NonNullish(
+    await loadSwingsetConfigFile(fullPath),
   );
-  assert(config);
 
   // speed up (e.g. 80s vs 133s with xs-worker in production config)
   config.defaultManagerType = 'local';
@@ -218,12 +206,12 @@ export const getNodeTestVaultsConfig = async (
   return testConfigPath;
 };
 
-/**
- * @param {object} powers
- * @param {Pick<typeof import('node:child_process'), 'execFileSync'>} powers.childProcess
- * @param {typeof import('node:fs/promises')} powers.fs
- */
-export const makeProposalExtractor = ({ childProcess, fs }) => {
+interface Powers {
+  childProcess: Pick<typeof import('node:child_process'), 'execFileSync'>;
+  fs: typeof import('node:fs/promises');
+}
+
+export const makeProposalExtractor = ({ childProcess, fs }: Powers) => {
   const getPkgPath = (pkg, fileName = '') =>
     new URL(`../../../${pkg}/${fileName}`, import.meta.url).pathname;
 
@@ -240,8 +228,7 @@ export const makeProposalExtractor = ({ childProcess, fs }) => {
     harden(JSON.parse(await fs.readFile(filePath, 'utf8')));
 
   // XXX parses the output to find the files but could write them to a path that can be traversed
-  /** @param {string} txt */
-  const parseProposalParts = txt => {
+  const parseProposalParts = (txt: string) => {
     const evals = [
       ...txt.matchAll(/swingset-core-eval (?<permit>\S+) (?<script>\S+)/g),
     ].map(m => {
@@ -260,16 +247,14 @@ export const makeProposalExtractor = ({ childProcess, fs }) => {
     return { evals, bundles };
   };
 
-  /**
-   * @param {object} options
-   * @param {string} options.package
-   * @param {string} options.packageScriptName
-   * @param {Record<string, string>} [options.env]
-   */
   const buildAndExtract = async ({
     package: packageName,
     packageScriptName,
     env = {},
+  }: {
+    package: string;
+    packageScriptName: string;
+    env?: Record<string, string>;
   }) => {
     const scriptEnv = Object.assign(Object.create(process.env), env);
     // XXX use '@agoric/inter-protocol'?
@@ -300,7 +285,7 @@ export const makeProposalExtractor = ({ childProcess, fs }) => {
     const bundlesP = Promise.all(
       built.bundles.map(
         async bundleFile =>
-          /** @type {Promise<EndoZipBase64Bundle>} */ (loadJSON(bundleFile)),
+          loadJSON(bundleFile) as Promise<EndoZipBase64Bundle>,
       ),
     );
     return Promise.all([evalsP, bundlesP]).then(([evals, bundles]) => ({
@@ -323,16 +308,19 @@ harden(makeProposalExtractor);
  * a timeout error). Use t.after.always(shutdown), because the normal t.after()
  * hooks are not run if a test fails.
  *
- * @param {import('ava').ExecutionContext} t
- * @param {string} bundleDir directory to write bundles and config to
- * @param {object} [options]
- * @param {string} [options.configSpecifier] bootstrap config specifier
- * @param {import('@agoric/internal/src/storage-test-utils.js').FakeStorageKit} [options.storage]
+ * @param t
+ * @param bundleDir directory to write bundles and config to
+ * @param [options]
+ * @param [options.configSpecifier] bootstrap config specifier
+ * @param [options.storage]
  */
 export const makeSwingsetTestKit = async (
-  t,
-  bundleDir = 'bundles',
-  { configSpecifier, storage = makeFakeStorageKit('bootstrapTests') } = {},
+  t: ExecutionContext,
+  bundleDir: string = 'bundles',
+  {
+    configSpecifier,
+    storage = makeFakeStorageKit('bootstrapTests'),
+  }: { configSpecifier?: string; storage?: FakeStorageKit } = {},
 ) => {
   console.time('makeSwingsetTestKit');
   const configPath = await getNodeTestVaultsConfig(bundleDir, configSpecifier);
@@ -351,11 +339,8 @@ export const makeSwingsetTestKit = async (
   /**
    * Mock the bridge outbound handler. The real one is implemented in Golang so
    * changes there will sometimes require changes here.
-   *
-   * @param {string} bridgeId
-   * @param {any} obj
    */
-  const bridgeOutbound = (bridgeId, obj) => {
+  const bridgeOutbound = (bridgeId: string, obj: any) => {
     switch (bridgeId) {
       case BridgeId.BANK: {
         trace(
@@ -442,8 +427,7 @@ export const makeSwingsetTestKit = async (
   console.timeEnd('makeSwingsetTestKit');
 
   let currentTime = 0n;
-  /** @param {Timestamp} targetTime */
-  const jumpTimeTo = targetTime => {
+  const jumpTimeTo = (targetTime: Timestamp) => {
     targetTime = TimeMath.absValue(targetTime);
     targetTime >= currentTime ||
       Fail`cannot reverse time :-(  (${targetTime} < ${currentTime})`;
@@ -451,8 +435,7 @@ export const makeSwingsetTestKit = async (
     trace('jumpTimeTo', currentTime);
     return runUtils.runThunk(() => timer.poll(currentTime));
   };
-  /** @param {Timestamp} targetTime */
-  const advanceTimeTo = async targetTime => {
+  const advanceTimeTo = async (targetTime: Timestamp) => {
     targetTime = TimeMath.absValue(targetTime);
     targetTime >= currentTime ||
       Fail`cannot reverse time :-(  (${targetTime} < ${currentTime})`;
@@ -462,11 +445,10 @@ export const makeSwingsetTestKit = async (
       await runUtils.runThunk(() => timer.poll(currentTime));
     }
   };
-  /**
-   * @param {number} n
-   * @param {'seconds' | 'minutes' | 'hours' | 'days'} unit
-   */
-  const advanceTimeBy = (n, unit) => {
+  const advanceTimeBy = (
+    n: number,
+    unit: 'seconds' | 'minutes' | 'hours' | 'days',
+  ) => {
     const multiplier = {
       seconds: 1,
       minutes: 60,
@@ -495,3 +477,4 @@ export const makeSwingsetTestKit = async (
     timer,
   };
 };
+export type SwingsetTestKit = Awaited<ReturnType<typeof makeSwingsetTestKit>>;
diff --git a/packages/boot/test/bootstrapTests/test-demo-config.js b/packages/boot/test/bootstrapTests/test-demo-config.ts
similarity index 93%
rename from packages/boot/test/bootstrapTests/test-demo-config.js
rename to packages/boot/test/bootstrapTests/test-demo-config.ts
index 39fddac0fb8..76e29293a17 100644
--- a/packages/boot/test/bootstrapTests/test-demo-config.js
+++ b/packages/boot/test/bootstrapTests/test-demo-config.ts
@@ -1,17 +1,11 @@
-// @ts-check
 import { test as anyTest } from '@agoric/zoe/tools/prepare-test-env-ava.js';
 
 import { PowerFlags } from '@agoric/vats/src/walletFlags.js';
 
-import { makeSwingsetTestKit, keyArrayEqual } from './supports.js';
+import type { TestFn } from 'ava';
+import { makeSwingsetTestKit, keyArrayEqual } from './supports.ts';
 
 const { keys } = Object;
-/**
- * @type {import('ava').TestFn<
- *   Awaited<ReturnType<typeof makeDefaultTestContext>>
- * >}
- */
-const test = anyTest;
 
 const makeDefaultTestContext = async t => {
   const swingsetTestKit = await makeSwingsetTestKit(t, 'bundles/demo-config', {
@@ -20,6 +14,10 @@ const makeDefaultTestContext = async t => {
   return swingsetTestKit;
 };
 
+type DefaultTestContext = Awaited<ReturnType<typeof makeDefaultTestContext>>;
+
+const test: TestFn<DefaultTestContext> = anyTest;
+
 test.before(async t => (t.context = await makeDefaultTestContext(t)));
 test.after.always(t => t.context.shutdown?.());
 
diff --git a/packages/boot/test/bootstrapTests/test-liquidation-1.js b/packages/boot/test/bootstrapTests/test-liquidation-1.ts
similarity index 90%
rename from packages/boot/test/bootstrapTests/test-liquidation-1.js
rename to packages/boot/test/bootstrapTests/test-liquidation-1.ts
index e182fec5787..9af2c9ca477 100644
--- a/packages/boot/test/bootstrapTests/test-liquidation-1.js
+++ b/packages/boot/test/bootstrapTests/test-liquidation-1.ts
@@ -1,25 +1,23 @@
-// @ts-check
 /** @file Bootstrap test of liquidation across multiple collaterals */
 import { test as anyTest } from '@agoric/zoe/tools/prepare-test-env-ava.js';
 
 import { NonNullish } from '@agoric/assert';
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import process from 'process';
+import type { ExecutionContext, TestFn } from 'ava';
+import type { ScheduleNotification } from '@agoric/inter-protocol/src/auction/scheduler.js';
+import { BridgeHandler } from '@agoric/vats';
 import {
+  LiquidationTestContext,
   likePayouts,
   makeLiquidationTestContext,
   scale6,
-} from './liquidation.js';
+} from './liquidation.ts';
 
-/**
- * @type {import('ava').TestFn<
- *   Awaited<ReturnType<typeof makeLiquidationTestContext>>
- * >}
- */
-const test = anyTest;
+const test = anyTest as TestFn<LiquidationTestContext>;
 
 //#region Product spec
-const setup = /** @type {const} */ ({
+const setup = {
   vaults: [
     {
       atom: 15,
@@ -61,9 +59,9 @@ const setup = /** @type {const} */ ({
       debt: 309.54,
     },
   },
-});
+} as const;
 
-const outcome = /** @type {const} */ ({
+const outcome = {
   bids: [
     {
       payouts: {
@@ -114,7 +112,7 @@ const outcome = /** @type {const} */ ({
       locked: 2.642185,
     },
   ],
-});
+} as const;
 //#endregion
 
 test.before(async t => {
@@ -125,21 +123,17 @@ test.after.always(t => {
 });
 
 // Reference: Flow 1 from https://github.com/Agoric/agoric-sdk/issues/7123
-/**
- * @param {import('ava').ExecutionContext<
- *   Awaited<ReturnType<typeof makeLiquidationTestContext>>
- * >} t
- * @param {{ collateralBrandKey: string; managerIndex: number }} case
- * @param {any} _expected
- */
 const checkFlow1 = async (
-  t,
-  { collateralBrandKey, managerIndex },
-  _expected,
+  t: ExecutionContext<LiquidationTestContext>,
+  {
+    collateralBrandKey,
+    managerIndex,
+  }: { collateralBrandKey: string; managerIndex: number },
+  _expected: any,
 ) => {
   // fail if there are any unhandled rejections
-  process.on('unhandledRejection', error => {
-    t.fail(/** @type {Error} */ (error).message);
+  process.on('unhandledRejection', (error: Error) => {
+    t.fail(error.message);
   });
 
   const {
@@ -253,8 +247,9 @@ const checkFlow1 = async (
     await priceFeedDrivers[collateralBrandKey].setPrice(9.99);
 
     // check nothing liquidating yet
-    /** @type {import('@agoric/inter-protocol/src/auction/scheduler.js').ScheduleNotification} */
-    const liveSchedule = readLatest('published.auction.schedule');
+    const liveSchedule: ScheduleNotification = readLatest(
+      'published.auction.schedule',
+    );
     t.is(liveSchedule.activeStartTime, null);
     t.like(readLatest(metricsPath), {
       numActiveVaults: setup.vaults.length,
@@ -340,15 +335,9 @@ const checkFlow1 = async (
     console.log(collateralBrandKey, 'step 10 of 10');
     // continuing after now would start a new auction
     {
-      /**
-       * @type {Record<
-       *   string,
-       *   import('@agoric/time/src/types.js').TimestampRecord
-       * >}
-       */
       const { nextDescendingStepTime, nextStartTime } = readLatest(
         'published.auction.schedule',
-      );
+      ) as Record<string, import('@agoric/time/src/types.js').TimestampRecord>;
       t.is(nextDescendingStepTime.absValue, nextStartTime.absValue);
     }
 
@@ -421,10 +410,9 @@ test.serial('add STARS collateral', async t => {
   t.log({ bridgeMessage });
 
   const { EV } = t.context.runUtils;
-  /** @type {ERef<import('@agoric/vats/src/types.js').BridgeHandler>} */
-  const coreEvalBridgeHandler = await EV.vat('bootstrap').consumeItem(
-    'coreEvalBridgeHandler',
-  );
+  const coreEvalBridgeHandler: ERef<BridgeHandler> = await EV.vat(
+    'bootstrap',
+  ).consumeItem('coreEvalBridgeHandler');
   await EV(coreEvalBridgeHandler).fromBridge(bridgeMessage);
 
   t.context.refreshAgoricNamesRemotes();
diff --git a/packages/boot/test/bootstrapTests/test-liquidation-2b.js b/packages/boot/test/bootstrapTests/test-liquidation-2b.ts
similarity index 94%
rename from packages/boot/test/bootstrapTests/test-liquidation-2b.js
rename to packages/boot/test/bootstrapTests/test-liquidation-2b.ts
index 84452a123fb..1256b7e8a0f 100644
--- a/packages/boot/test/bootstrapTests/test-liquidation-2b.js
+++ b/packages/boot/test/bootstrapTests/test-liquidation-2b.ts
@@ -10,20 +10,21 @@ import { test as anyTest } from '@agoric/zoe/tools/prepare-test-env-ava.js';
 
 import { NonNullish } from '@agoric/assert';
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
-import { makeLiquidationTestContext, scale6 } from './liquidation.js';
+import type { TestFn } from 'ava';
+import { ScheduleNotification } from '@agoric/inter-protocol/src/auction/scheduler.js';
+import {
+  LiquidationTestContext,
+  makeLiquidationTestContext,
+  scale6,
+} from './liquidation.ts';
 
-/**
- * @type {import('ava').TestFn<
- *   Awaited<ReturnType<typeof makeLiquidationTestContext>>
- * >}
- */
-const test = anyTest;
+const test = anyTest as TestFn<LiquidationTestContext>;
 
 // presently all these tests use one collateral manager
 const collateralBrandKey = 'ATOM';
 
 //#region Product spec
-const setup = /** @type {const} */ ({
+const setup = {
   vaults: [
     {
       atom: 15,
@@ -61,9 +62,9 @@ const setup = /** @type {const} */ ({
       debt: 309.54,
     },
   },
-});
+} as const;
 
-const outcome = /** @type {const} */ ({
+const outcome = {
   bids: [
     {
       payouts: {
@@ -109,7 +110,7 @@ const outcome = /** @type {const} */ ({
       locked: 0,
     },
   ],
-});
+} as const;
 //#endregion
 
 test.before(async t => {
@@ -205,8 +206,9 @@ test.serial('scenario: Flow 2b', async t => {
     await priceFeedDrivers.ATOM.setPrice(9.99);
 
     // check nothing liquidating yet
-    /** @type {import('@agoric/inter-protocol/src/auction/scheduler.js').ScheduleNotification} */
-    const liveSchedule = readLatest('published.auction.schedule');
+    const liveSchedule: ScheduleNotification = readLatest(
+      'published.auction.schedule',
+    );
     t.is(liveSchedule.activeStartTime, null);
     t.like(readLatest('published.vaultFactory.managers.manager0.metrics'), {
       numActiveVaults: setup.vaults.length,
diff --git a/packages/boot/test/bootstrapTests/test-vats-restart.js b/packages/boot/test/bootstrapTests/test-vats-restart.ts
similarity index 84%
rename from packages/boot/test/bootstrapTests/test-vats-restart.js
rename to packages/boot/test/bootstrapTests/test-vats-restart.ts
index cd3f68aa679..9fabf23e4ec 100644
--- a/packages/boot/test/bootstrapTests/test-vats-restart.js
+++ b/packages/boot/test/bootstrapTests/test-vats-restart.ts
@@ -1,4 +1,3 @@
-// @ts-check
 /** @file Bootstrap test of restarting (almost) all vats */
 import { test as anyTest } from '@agoric/zoe/tools/prepare-test-env-ava.js';
 import { eventLoopIteration } from '@agoric/internal/src/testing-utils.js';
@@ -8,20 +7,19 @@ import { promises as fsAmbientPromises } from 'fs';
 
 import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import { makeAgoricNamesRemotesFromFakeStorage } from '@agoric/vats/tools/board-utils.js';
-import { makeWalletFactoryDriver } from './drivers.js';
-import { makeProposalExtractor, makeSwingsetTestKit } from './supports.js';
+import { TestFn } from 'ava';
+import { BridgeHandler } from '@agoric/vats';
+import type { EconomyBootstrapSpace } from '@agoric/inter-protocol/src/proposals/econ-behaviors.js';
+import { makeProposalExtractor, makeSwingsetTestKit } from './supports.ts';
+import { makeWalletFactoryDriver } from './drivers.ts';
 
 const { Fail } = assert;
 
-/** @file Bootstrap test of restarting (almost) all vats */
-
 // main/production config doesn't have initialPrice, upon which 'open vaults' depends
 const PLATFORM_CONFIG = '@agoric/vm-config/decentral-itest-vaults-config.json';
-/** @typedef {Awaited<ReturnType<typeof makeSwingsetTestKit>>} SwingsetTestKit */
 
 export const makeTestContext = async t => {
   console.time('DefaultTestContext');
-  /** @type {SwingsetTestKit} */
   const swingsetTestKit = await makeSwingsetTestKit(t, 'bundles/vaults', {
     configSpecifier: PLATFORM_CONFIG,
   });
@@ -64,12 +62,8 @@ export const makeTestContext = async t => {
     buildProposal,
   };
 };
-/**
- * @type {import('ava').TestFn<
- *   Awaited<ReturnType<typeof makeTestContext>>
- * >}
- */
-const test = anyTest;
+
+const test = anyTest as TestFn<Awaited<ReturnType<typeof makeTestContext>>>;
 
 // presently all these tests use one collateral manager
 const collateralBrandKey = 'ATOM';
@@ -121,10 +115,9 @@ test.serial('run restart-vats proposal', async t => {
   };
   t.log({ bridgeMessage });
   const { EV } = t.context.runUtils;
-  /** @type {ERef<import('@agoric/vats/src/types.js').BridgeHandler>} */
-  const coreEvalBridgeHandler = await EV.vat('bootstrap').consumeItem(
-    'coreEvalBridgeHandler',
-  );
+  const coreEvalBridgeHandler: BridgeHandler = await EV.vat(
+    'bootstrap',
+  ).consumeItem('coreEvalBridgeHandler');
   await EV(coreEvalBridgeHandler).fromBridge(bridgeMessage);
 
   t.log('restart-vats proposal executed');
@@ -134,13 +127,9 @@ test.serial('run restart-vats proposal', async t => {
 test.serial('read metrics', async t => {
   const { EV } = t.context.runUtils;
 
-  /**
-   * @type {Awaited<
-   *   import('@agoric/inter-protocol/src/proposals/econ-behaviors.js').EconomyBootstrapSpace['consume']['vaultFactoryKit']
-   * >}
-   */
-  const vaultFactoryKit =
-    await EV.vat('bootstrap').consumeItem('vaultFactoryKit');
+  const vaultFactoryKit: Awaited<
+    EconomyBootstrapSpace['consume']['vaultFactoryKit']
+  > = await EV.vat('bootstrap').consumeItem('vaultFactoryKit');
 
   const vfTopics = await EV(vaultFactoryKit.publicFacet).getPublicTopics();
 
diff --git a/packages/boot/test/bootstrapTests/test-vaults-integration.js b/packages/boot/test/bootstrapTests/test-vaults-integration.ts
similarity index 95%
rename from packages/boot/test/bootstrapTests/test-vaults-integration.js
rename to packages/boot/test/bootstrapTests/test-vaults-integration.ts
index 4531e978b8e..f0ce7dd7031 100644
--- a/packages/boot/test/bootstrapTests/test-vaults-integration.js
+++ b/packages/boot/test/bootstrapTests/test-vaults-integration.ts
@@ -1,5 +1,3 @@
-// @ts-check
-/* eslint @typescript-eslint/no-floating-promises: "warn" */
 /** @file Bootstrap test integration vaults with smart-wallet */
 import { test as anyTest } from '@agoric/zoe/tools/prepare-test-env-ava.js';
 
@@ -13,15 +11,10 @@ import {
   makeAgoricNamesRemotesFromFakeStorage,
   slotToBoardRemote,
 } from '@agoric/vats/tools/board-utils.js';
-import { makeWalletFactoryDriver } from './drivers.js';
-import { makeSwingsetTestKit } from './supports.js';
-
-/**
- * @type {import('ava').TestFn<
- *   Awaited<ReturnType<typeof makeDefaultTestContext>>
- * >}
- */
-const test = anyTest;
+import type { TestFn } from 'ava';
+import { ParamChangesOfferArgs } from '@agoric/inter-protocol/src/econCommitteeCharter.js';
+import { makeWalletFactoryDriver } from './drivers.ts';
+import { makeSwingsetTestKit } from './supports.ts';
 
 // presently all these tests use one collateral manager
 const collateralBrandKey = 'ATOM';
@@ -66,6 +59,10 @@ const makeDefaultTestContext = async t => {
   return { ...swingsetTestKit, agoricNamesRemotes, walletFactoryDriver };
 };
 
+const test = anyTest as TestFn<
+  Awaited<ReturnType<typeof makeDefaultTestContext>>
+>;
+
 test.before(async t => {
   t.context = await makeDefaultTestContext(t);
 });
@@ -321,8 +318,7 @@ test('propose change to auction governance param', async t => {
     StartFrequency: { timerBrand, relValue: 5n * 60n },
   };
 
-  /** @type {import('@agoric/inter-protocol/src/econCommitteeCharter.js').ParamChangesOfferArgs} */
-  const offerArgs = {
+  const offerArgs: ParamChangesOfferArgs = {
     deadline: 1000n,
     params,
     instance: auctioneer,
diff --git a/packages/boot/test/bootstrapTests/test-vaults-upgrade.js b/packages/boot/test/bootstrapTests/test-vaults-upgrade.ts
similarity index 91%
rename from packages/boot/test/bootstrapTests/test-vaults-upgrade.js
rename to packages/boot/test/bootstrapTests/test-vaults-upgrade.ts
index a7314bb4969..5f46f14b8ce 100644
--- a/packages/boot/test/bootstrapTests/test-vaults-upgrade.js
+++ b/packages/boot/test/bootstrapTests/test-vaults-upgrade.ts
@@ -1,4 +1,4 @@
-// @ts-check
+/* eslint-disable jsdoc/require-param-type, @jessie.js/safe-await-separator */
 /**
  * @file Bootstrap test integration vaults with smart-wallet. The tests in this
  *   file are NOT independent; a single `test.before()` handler creates shared
@@ -12,22 +12,22 @@ import { Offers } from '@agoric/inter-protocol/src/clientSupport.js';
 import { Far, makeMarshal } from '@endo/marshal';
 import { SECONDS_PER_YEAR } from '@agoric/inter-protocol/src/interest.js';
 import { makeAgoricNamesRemotesFromFakeStorage } from '@agoric/vats/tools/board-utils.js';
-import { makeSwingsetTestKit } from './supports.js';
-import { makeWalletFactoryDriver } from './drivers.js';
+import { ExecutionContext, TestFn } from 'ava';
+import { FakeStorageKit } from '@agoric/internal/src/storage-test-utils.js';
+import { EconomyBootstrapSpace } from '@agoric/inter-protocol/src/proposals/econ-behaviors.js';
+import { makeWalletFactoryDriver } from './drivers.ts';
+import { makeSwingsetTestKit } from './supports.ts';
 
 // presently all these tests use one collateral manager
 const collateralBrandKey = 'ATOM';
 
-/**
- * @param {import('ava').ExecutionContext} t
- * @param {object} [options]
- * @param {number} [options.incarnation]
- * @param {boolean} [options.logTiming]
- * @param {import('@agoric/internal/src/storage-test-utils.js').FakeStorageKit} [options.storage]
- */
 const makeDefaultTestContext = async (
-  t,
-  { incarnation = 1, logTiming = true, storage = undefined } = {},
+  t: ExecutionContext,
+  {
+    incarnation = 1,
+    logTiming = true,
+    storage = undefined as FakeStorageKit | undefined,
+  } = {},
 ) => {
   logTiming && console.time('DefaultTestContext');
   const swingsetTestKit = await makeSwingsetTestKit(t, 'bundles/vaults', {
@@ -79,12 +79,10 @@ const makeDefaultTestContext = async (
 /**
  * Shared context can be updated by re-bootstrapping, and is placed one property
  * deep so such changes propagate to later tests.
- *
- * @type {import('ava').TestFn<{
- *   shared: Awaited<ReturnType<typeof makeDefaultTestContext>>;
- * }>}
  */
-const test = anyTest;
+const test = anyTest as TestFn<{
+  shared: Awaited<ReturnType<typeof makeDefaultTestContext>>;
+}>;
 test.before(async t => {
   const shared = await makeDefaultTestContext(t);
   t.context = { shared };
@@ -286,13 +284,9 @@ test.serial('open vault', async t => {
 test.serial('restart vaultFactory', async t => {
   const { runUtils, readCollateralMetrics } = t.context.shared;
   const { EV } = runUtils;
-  /**
-   * @type {Awaited<
-   *   import('@agoric/inter-protocol/src/proposals/econ-behaviors.js').EconomyBootstrapSpace['consume']['vaultFactoryKit']
-   * >}
-   */
-  const vaultFactoryKit =
-    await EV.vat('bootstrap').consumeItem('vaultFactoryKit');
+  const vaultFactoryKit = await (EV.vat('bootstrap').consumeItem(
+    'vaultFactoryKit',
+  ) as EconomyBootstrapSpace['consume']['vaultFactoryKit']);
 
   // @ts-expect-error cast XXX missing from type
   const { privateArgs } = vaultFactoryKit;
@@ -316,13 +310,9 @@ test.serial('restart vaultFactory', async t => {
 
 test.serial('restart contractGovernor', async t => {
   const { EV } = t.context.shared.runUtils;
-  /**
-   * @type {Awaited<
-   *   import('@agoric/inter-protocol/src/proposals/econ-behaviors.js').EconomyBootstrapSpace['consume']['vaultFactoryKit']
-   * >}
-   */
-  const vaultFactoryKit =
-    await EV.vat('bootstrap').consumeItem('vaultFactoryKit');
+  const vaultFactoryKit = await (EV.vat('bootstrap').consumeItem(
+    'vaultFactoryKit',
+  ) as EconomyBootstrapSpace['consume']['vaultFactoryKit']);
 
   const { governorAdminFacet } = vaultFactoryKit;
   // has no privateArgs of its own. the privateArgs.governed is only for the
@@ -487,12 +477,13 @@ test.serial(
     // by inspection, we see that it is:
     // [ "v1.vs.vc.1.sBootstrap Powers", "{\"body\":\"#\\\"$0.Alleged: mapStore\\\"\",\"slots\":[\"o+d6/5\"]}",]
 
-    /** @type {MapStore} */
-    const powerStore = await EV.vat('bootstrap').consumeItem('powerStore');
+    const powerStore: MapStore =
+      await EV.vat('bootstrap').consumeItem('powerStore');
 
-    /** @type {(n: string) => Promise<[any, any][]>} */
-    const getStoreSnapshot = async name =>
-      EV.vat('bootstrap').snapshotStore(await EV(powerStore).get(name));
+    const getStoreSnapshot = async (name: string) =>
+      EV.vat('bootstrap').snapshotStore(
+        await EV(powerStore).get(name),
+      ) as Promise<[any, any][]>;
 
     const contractKits = await getStoreSnapshot('contractKits');
     // TODO refactor the entries to go into governedContractKits too (so the latter is sufficient to test)
@@ -503,11 +494,14 @@ test.serial(
     /**
      * Map refs to objects and find a vat containing one of them.
      *
-     * @param {Record<string, unknown>} refs
-     * @param {string[]} exclude don't report hits from these vatIDs
+     * @param refs
+     * @param exclude don't report hits from these vatIDs
      */
-    const findVat = async (refs, exclude = [zoeVat]) => {
-      const mapped = {};
+    const findVat = async (
+      refs: Record<string, unknown>,
+      exclude = [zoeVat],
+    ) => {
+      const mapped = {} as Record<string, any>;
       for await (const [prop, presence] of Object.entries(refs)) {
         if (!presence) {
           continue;
diff --git a/packages/boot/test/bootstrapTests/test-zcf-upgrade.js b/packages/boot/test/bootstrapTests/test-zcf-upgrade.ts
similarity index 92%
rename from packages/boot/test/bootstrapTests/test-zcf-upgrade.js
rename to packages/boot/test/bootstrapTests/test-zcf-upgrade.ts
index e93e5074c89..b3bcecc5c56 100644
--- a/packages/boot/test/bootstrapTests/test-zcf-upgrade.js
+++ b/packages/boot/test/bootstrapTests/test-zcf-upgrade.ts
@@ -1,4 +1,3 @@
-// @ts-check
 /* eslint @typescript-eslint/no-floating-promises: "warn" */
 
 import { test as anyTest } from '@agoric/zoe/tools/prepare-test-env-ava.js';
@@ -10,16 +9,16 @@ import processAmbient from 'child_process';
 import { promises as fsAmbientPromises } from 'fs';
 
 import { makeAgoricNamesRemotesFromFakeStorage } from '@agoric/vats/tools/board-utils.js';
-import { makeZoeDriver } from './drivers.js';
-import { makeProposalExtractor, makeSwingsetTestKit } from './supports.js';
+import { TestFn } from 'ava';
+import { BridgeHandler } from '@agoric/vats';
+import { makeZoeDriver } from './drivers.ts';
+import { makeProposalExtractor, makeSwingsetTestKit } from './supports.ts';
 
 const filename = new URL(import.meta.url).pathname;
 const dirname = path.dirname(filename);
 
 const ZCF_PROBE_SRC = './zcfProbe.js';
 
-/** @typedef {Awaited<ReturnType<typeof makeSwingsetTestKit>>} SwingsetTestKit */
-
 /**
  * @file Bootstrap test of upgrading ZCF to support atomicRearrange internally.
  *
@@ -42,7 +41,6 @@ const ZCF_PROBE_SRC = './zcfProbe.js';
 
 export const makeZoeTestContext = async t => {
   console.time('ZoeTestContext');
-  /** @type {SwingsetTestKit} */
   const swingsetTestKit = await makeSwingsetTestKit(t, 'bundles/zoe', {
     configSpecifier: '@agoric/vm-config/decentral-demo-config.json',
   });
@@ -83,12 +81,7 @@ export const makeZoeTestContext = async t => {
   };
 };
 
-/**
- * @type {import('ava').TestFn<
- *   Awaited<ReturnType<typeof makeZoeTestContext>>
- * >}
- */
-const test = anyTest;
+const test = anyTest as TestFn<Awaited<ReturnType<typeof makeZoeTestContext>>>;
 
 test.before(async t => {
   t.context = await makeZoeTestContext(t);
@@ -116,10 +109,9 @@ test('run restart-vats proposal', async t => {
     };
 
     t.log({ bridgeMessage });
-    /** @type {ERef<import('@agoric/vats/src/types.js').BridgeHandler>} */
-    const coreEvalBridgeHandler = await EV.vat('bootstrap').consumeItem(
-      'coreEvalBridgeHandler',
-    );
+    const coreEvalBridgeHandler: ERef<BridgeHandler> = await EV.vat(
+      'bootstrap',
+    ).consumeItem('coreEvalBridgeHandler');
     await EV(coreEvalBridgeHandler).fromBridge(bridgeMessage);
   };
   const source = `${dirname}/${ZCF_PROBE_SRC}`;
diff --git a/packages/boot/test/upgrading/test-upgrade-vats.js b/packages/boot/test/upgrading/test-upgrade-vats.js
index a171dad9465..f8f480d1175 100644
--- a/packages/boot/test/upgrading/test-upgrade-vats.js
+++ b/packages/boot/test/upgrading/test-upgrade-vats.js
@@ -4,7 +4,7 @@ import { test as anyTest } from '@agoric/swingset-vat/tools/prepare-test-env-ava
 import { resolve as importMetaResolve } from 'import-meta-resolve';
 import { BridgeId } from '@agoric/internal';
 import { buildVatController } from '@agoric/swingset-vat';
-import { makeRunUtils } from '../bootstrapTests/supports.js';
+import { makeRunUtils } from '../bootstrapTests/supports.ts';
 
 /**
  * @type {import('ava').TestFn<{}>}
diff --git a/packages/boot/tools/authorityViz.js b/packages/boot/tools/authorityViz.js
index 3938638c3bc..62ecfff0573 100755
--- a/packages/boot/tools/authorityViz.js
+++ b/packages/boot/tools/authorityViz.js
@@ -182,7 +182,9 @@ const manifest2graph = manifest => {
       level1(fnName, name, part.consume || {}, true);
     };
     doPart('space', permit);
-    spaces.forEach(s => doPart(s, permit[s]));
+    for (const s of spaces) {
+      doPart(s, permit[s]);
+    }
 
     if ('runBehaviors' in permit) {
       throw Error('not impl');
diff --git a/packages/boot/tsconfig.json b/packages/boot/tsconfig.json
index f3e0f6a0f37..3e84468c37d 100644
--- a/packages/boot/tsconfig.json
+++ b/packages/boot/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "extends": "../../tsconfig.json",
   "compilerOptions": {
+    "allowImportingTsExtensions": true,
     "allowSyntheticDefaultImports": true,
     "checkJs": true,
     "maxNodeModuleJsDepth": 2,
@@ -10,6 +11,7 @@
     "scripts/**/*.js",
     "src/**/*.js",
     "test/**/*.js",
+    "test/**/*.ts",
     "tools/**/*.js",
   ],
 }
diff --git a/packages/vats/src/core/lib-boot.js b/packages/vats/src/core/lib-boot.js
index 84cfad1d897..278e393b683 100644
--- a/packages/vats/src/core/lib-boot.js
+++ b/packages/vats/src/core/lib-boot.js
@@ -235,3 +235,4 @@ export const makeBootstrap = (
     //#endregion
   });
 };
+/** @typedef {Awaited<ReturnType<typeof makeBootstrap>>} BootstrapRootObject */
diff --git a/yarn.lock b/yarn.lock
index 8c292fcbd98..3c131cb85c9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -591,6 +591,140 @@
     esquery "^1.5.0"
     jsdoc-type-pratt-parser "~4.0.0"
 
+"@esbuild-kit/cjs-loader@^2.4.2":
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/@esbuild-kit/cjs-loader/-/cjs-loader-2.4.2.tgz#cb4dde00fbf744a68c4f20162ea15a8242d0fa54"
+  integrity sha512-BDXFbYOJzT/NBEtp71cvsrGPwGAMGRB/349rwKuoxNSiKjPraNNnlK6MIIabViCjqZugu6j+xeMDlEkWdHHJSg==
+  dependencies:
+    "@esbuild-kit/core-utils" "^3.0.0"
+    get-tsconfig "^4.4.0"
+
+"@esbuild-kit/core-utils@^3.0.0", "@esbuild-kit/core-utils@^3.2.2":
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/@esbuild-kit/core-utils/-/core-utils-3.2.2.tgz#ac3fe38d6ddcb3aa4658425034bb7a9cefa83495"
+  integrity sha512-Ub6LaRaAgF80dTSzUdXpFLM1pVDdmEVB9qb5iAzSpyDlX/mfJTFGOnZ516O05p5uWWteNviMKi4PAyEuRxI5gA==
+  dependencies:
+    esbuild "~0.18.20"
+    source-map-support "^0.5.21"
+
+"@esbuild-kit/esm-loader@^2.5.5":
+  version "2.5.5"
+  resolved "https://registry.yarnpkg.com/@esbuild-kit/esm-loader/-/esm-loader-2.5.5.tgz#b82da14fcee3fc1d219869756c06f43f67d1ca71"
+  integrity sha512-Qwfvj/qoPbClxCRNuac1Du01r9gvNOT+pMYtJDapfB1eoGN1YlJ1BixLyL9WVENRx5RXgNLdfYdx/CuswlGhMw==
+  dependencies:
+    "@esbuild-kit/core-utils" "^3.0.0"
+    get-tsconfig "^4.4.0"
+
+"@esbuild/android-arm64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/android-arm64/-/android-arm64-0.18.20.tgz#984b4f9c8d0377443cc2dfcef266d02244593622"
+  integrity sha512-Nz4rJcchGDtENV0eMKUNa6L12zz2zBDXuhj/Vjh18zGqB44Bi7MBMSXjgunJgjRhCmKOjnPuZp4Mb6OKqtMHLQ==
+
+"@esbuild/android-arm@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/android-arm/-/android-arm-0.18.20.tgz#fedb265bc3a589c84cc11f810804f234947c3682"
+  integrity sha512-fyi7TDI/ijKKNZTUJAQqiG5T7YjJXgnzkURqmGj13C6dCqckZBLdl4h7bkhHt/t0WP+zO9/zwroDvANaOqO5Sw==
+
+"@esbuild/android-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/android-x64/-/android-x64-0.18.20.tgz#35cf419c4cfc8babe8893d296cd990e9e9f756f2"
+  integrity sha512-8GDdlePJA8D6zlZYJV/jnrRAi6rOiNaCC/JclcXpB+KIuvfBN4owLtgzY2bsxnx666XjJx2kDPUmnTtR8qKQUg==
+
+"@esbuild/darwin-arm64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/darwin-arm64/-/darwin-arm64-0.18.20.tgz#08172cbeccf95fbc383399a7f39cfbddaeb0d7c1"
+  integrity sha512-bxRHW5kHU38zS2lPTPOyuyTm+S+eobPUnTNkdJEfAddYgEcll4xkT8DB9d2008DtTbl7uJag2HuE5NZAZgnNEA==
+
+"@esbuild/darwin-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/darwin-x64/-/darwin-x64-0.18.20.tgz#d70d5790d8bf475556b67d0f8b7c5bdff053d85d"
+  integrity sha512-pc5gxlMDxzm513qPGbCbDukOdsGtKhfxD1zJKXjCCcU7ju50O7MeAZ8c4krSJcOIJGFR+qx21yMMVYwiQvyTyQ==
+
+"@esbuild/freebsd-arm64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/freebsd-arm64/-/freebsd-arm64-0.18.20.tgz#98755cd12707f93f210e2494d6a4b51b96977f54"
+  integrity sha512-yqDQHy4QHevpMAaxhhIwYPMv1NECwOvIpGCZkECn8w2WFHXjEwrBn3CeNIYsibZ/iZEUemj++M26W3cNR5h+Tw==
+
+"@esbuild/freebsd-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/freebsd-x64/-/freebsd-x64-0.18.20.tgz#c1eb2bff03915f87c29cece4c1a7fa1f423b066e"
+  integrity sha512-tgWRPPuQsd3RmBZwarGVHZQvtzfEBOreNuxEMKFcd5DaDn2PbBxfwLcj4+aenoh7ctXcbXmOQIn8HI6mCSw5MQ==
+
+"@esbuild/linux-arm64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-arm64/-/linux-arm64-0.18.20.tgz#bad4238bd8f4fc25b5a021280c770ab5fc3a02a0"
+  integrity sha512-2YbscF+UL7SQAVIpnWvYwM+3LskyDmPhe31pE7/aoTMFKKzIc9lLbyGUpmmb8a8AixOL61sQ/mFh3jEjHYFvdA==
+
+"@esbuild/linux-arm@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-arm/-/linux-arm-0.18.20.tgz#3e617c61f33508a27150ee417543c8ab5acc73b0"
+  integrity sha512-/5bHkMWnq1EgKr1V+Ybz3s1hWXok7mDFUMQ4cG10AfW3wL02PSZi5kFpYKrptDsgb2WAJIvRcDm+qIvXf/apvg==
+
+"@esbuild/linux-ia32@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-ia32/-/linux-ia32-0.18.20.tgz#699391cccba9aee6019b7f9892eb99219f1570a7"
+  integrity sha512-P4etWwq6IsReT0E1KHU40bOnzMHoH73aXp96Fs8TIT6z9Hu8G6+0SHSw9i2isWrD2nbx2qo5yUqACgdfVGx7TA==
+
+"@esbuild/linux-loong64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-loong64/-/linux-loong64-0.18.20.tgz#e6fccb7aac178dd2ffb9860465ac89d7f23b977d"
+  integrity sha512-nXW8nqBTrOpDLPgPY9uV+/1DjxoQ7DoB2N8eocyq8I9XuqJ7BiAMDMf9n1xZM9TgW0J8zrquIb/A7s3BJv7rjg==
+
+"@esbuild/linux-mips64el@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-mips64el/-/linux-mips64el-0.18.20.tgz#eeff3a937de9c2310de30622a957ad1bd9183231"
+  integrity sha512-d5NeaXZcHp8PzYy5VnXV3VSd2D328Zb+9dEq5HE6bw6+N86JVPExrA6O68OPwobntbNJ0pzCpUFZTo3w0GyetQ==
+
+"@esbuild/linux-ppc64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-ppc64/-/linux-ppc64-0.18.20.tgz#2f7156bde20b01527993e6881435ad79ba9599fb"
+  integrity sha512-WHPyeScRNcmANnLQkq6AfyXRFr5D6N2sKgkFo2FqguP44Nw2eyDlbTdZwd9GYk98DZG9QItIiTlFLHJHjxP3FA==
+
+"@esbuild/linux-riscv64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-riscv64/-/linux-riscv64-0.18.20.tgz#6628389f210123d8b4743045af8caa7d4ddfc7a6"
+  integrity sha512-WSxo6h5ecI5XH34KC7w5veNnKkju3zBRLEQNY7mv5mtBmrP/MjNBCAlsM2u5hDBlS3NGcTQpoBvRzqBcRtpq1A==
+
+"@esbuild/linux-s390x@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-s390x/-/linux-s390x-0.18.20.tgz#255e81fb289b101026131858ab99fba63dcf0071"
+  integrity sha512-+8231GMs3mAEth6Ja1iK0a1sQ3ohfcpzpRLH8uuc5/KVDFneH6jtAJLFGafpzpMRO6DzJ6AvXKze9LfFMrIHVQ==
+
+"@esbuild/linux-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-x64/-/linux-x64-0.18.20.tgz#c7690b3417af318a9b6f96df3031a8865176d338"
+  integrity sha512-UYqiqemphJcNsFEskc73jQ7B9jgwjWrSayxawS6UVFZGWrAAtkzjxSqnoclCXxWtfwLdzU+vTpcNYhpn43uP1w==
+
+"@esbuild/netbsd-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/netbsd-x64/-/netbsd-x64-0.18.20.tgz#30e8cd8a3dded63975e2df2438ca109601ebe0d1"
+  integrity sha512-iO1c++VP6xUBUmltHZoMtCUdPlnPGdBom6IrO4gyKPFFVBKioIImVooR5I83nTew5UOYrk3gIJhbZh8X44y06A==
+
+"@esbuild/openbsd-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/openbsd-x64/-/openbsd-x64-0.18.20.tgz#7812af31b205055874c8082ea9cf9ab0da6217ae"
+  integrity sha512-e5e4YSsuQfX4cxcygw/UCPIEP6wbIL+se3sxPdCiMbFLBWu0eiZOJ7WoD+ptCLrmjZBK1Wk7I6D/I3NglUGOxg==
+
+"@esbuild/sunos-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/sunos-x64/-/sunos-x64-0.18.20.tgz#d5c275c3b4e73c9b0ecd38d1ca62c020f887ab9d"
+  integrity sha512-kDbFRFp0YpTQVVrqUd5FTYmWo45zGaXe0X8E1G/LKFC0v8x0vWrhOWSLITcCn63lmZIxfOMXtCfti/RxN/0wnQ==
+
+"@esbuild/win32-arm64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/win32-arm64/-/win32-arm64-0.18.20.tgz#73bc7f5a9f8a77805f357fab97f290d0e4820ac9"
+  integrity sha512-ddYFR6ItYgoaq4v4JmQQaAI5s7npztfV4Ag6NrhiaW0RrnOXqBkgwZLofVTlq1daVTQNhtI5oieTvkRPfZrePg==
+
+"@esbuild/win32-ia32@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/win32-ia32/-/win32-ia32-0.18.20.tgz#ec93cbf0ef1085cc12e71e0d661d20569ff42102"
+  integrity sha512-Wv7QBi3ID/rROT08SABTS7eV4hX26sVduqDOTe1MvGMjNd3EjOz4b7zeexIR62GTIEKrfJXKL9LFxTYgkyeu7g==
+
+"@esbuild/win32-x64@0.18.20":
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/@esbuild/win32-x64/-/win32-x64-0.18.20.tgz#786c5f41f043b07afb1af37683d7c33668858f6d"
+  integrity sha512-kTdfRcSiDfQca/y9QIkng02avJ+NCaQvrMejlsB3RRv5sE9rRoeBPISaZpKxHELzRxZyLvNts1P27W3wV+8geQ==
+
 "@eslint-community/eslint-utils@^4.2.0", "@eslint-community/eslint-utils@^4.4.0":
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz#a23514e8fb9af1269d5f7788aa556798d61c6b59"
@@ -4072,6 +4206,34 @@ es-to-primitive@^1.2.1:
     is-date-object "^1.0.1"
     is-symbol "^1.0.2"
 
+esbuild@~0.18.20:
+  version "0.18.20"
+  resolved "https://registry.yarnpkg.com/esbuild/-/esbuild-0.18.20.tgz#4709f5a34801b43b799ab7d6d82f7284a9b7a7a6"
+  integrity sha512-ceqxoedUrcayh7Y7ZX6NdbbDzGROiyVBgC4PriJThBKSVPWnnFHZAkfI1lJT8QFkOwH4qOS2SJkS4wvpGl8BpA==
+  optionalDependencies:
+    "@esbuild/android-arm" "0.18.20"
+    "@esbuild/android-arm64" "0.18.20"
+    "@esbuild/android-x64" "0.18.20"
+    "@esbuild/darwin-arm64" "0.18.20"
+    "@esbuild/darwin-x64" "0.18.20"
+    "@esbuild/freebsd-arm64" "0.18.20"
+    "@esbuild/freebsd-x64" "0.18.20"
+    "@esbuild/linux-arm" "0.18.20"
+    "@esbuild/linux-arm64" "0.18.20"
+    "@esbuild/linux-ia32" "0.18.20"
+    "@esbuild/linux-loong64" "0.18.20"
+    "@esbuild/linux-mips64el" "0.18.20"
+    "@esbuild/linux-ppc64" "0.18.20"
+    "@esbuild/linux-riscv64" "0.18.20"
+    "@esbuild/linux-s390x" "0.18.20"
+    "@esbuild/linux-x64" "0.18.20"
+    "@esbuild/netbsd-x64" "0.18.20"
+    "@esbuild/openbsd-x64" "0.18.20"
+    "@esbuild/sunos-x64" "0.18.20"
+    "@esbuild/win32-arm64" "0.18.20"
+    "@esbuild/win32-ia32" "0.18.20"
+    "@esbuild/win32-x64" "0.18.20"
+
 escalade@^3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
@@ -4917,6 +5079,13 @@ get-symbol-description@^1.0.0:
     call-bind "^1.0.2"
     get-intrinsic "^1.1.1"
 
+get-tsconfig@^4.4.0:
+  version "4.7.0"
+  resolved "https://registry.yarnpkg.com/get-tsconfig/-/get-tsconfig-4.7.0.tgz#06ce112a1463e93196aa90320c35df5039147e34"
+  integrity sha512-pmjiZ7xtB8URYm74PlGJozDNyhvsVLUcpBa8DZBG3bWHwaHa9bPiRpiSfovw+fjhwONSCWKRyk+JQHEGZmMrzw==
+  dependencies:
+    resolve-pkg-maps "^1.0.0"
+
 git-raw-commits@^2.0.8:
   version "2.0.11"
   resolved "https://registry.yarnpkg.com/git-raw-commits/-/git-raw-commits-2.0.11.tgz#bc3576638071d18655e1cc60d7f524920008d723"
@@ -8213,6 +8382,11 @@ resolve-from@^5.0.0:
   resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-5.0.0.tgz#c35225843df8f776df21c57557bc087e9dfdfc69"
   integrity sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==
 
+resolve-pkg-maps@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/resolve-pkg-maps/-/resolve-pkg-maps-1.0.0.tgz#616b3dc2c57056b5588c31cdf4b3d64db133720f"
+  integrity sha512-seS2Tj26TBVOC2NIc2rOe2y2ZO7efxITtLZcGSOnHHNOQ7CkiUBfw0Iw2ck6xkIhPwLhKNLS8BO+hEpngQlqzw==
+
 resolve@^1.10.0, resolve@^1.12.0, resolve@^1.17.0, resolve@^1.19.0, resolve@^1.22.1:
   version "1.22.1"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.22.1.tgz#27cb2ebb53f91abb49470a928bba7558066ac177"
@@ -8563,12 +8737,20 @@ sort-keys@^4.0.0:
   dependencies:
     is-plain-obj "^2.0.0"
 
+source-map-support@^0.5.21:
+  version "0.5.21"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.21.tgz#04fe7c7f9e1ed2d662233c28cb2b35b9f63f6e4f"
+  integrity sha512-uBHU3L3czsIyYXKX88fdrGovxdSCoTGDRZ6SYXtSRxLZUzHg5P/66Ht6uoUlHu9EZod+inXhKo3qQgwXUT/y1w==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
 source-map@^0.5.0:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
 
-source-map@^0.6.1, source-map@~0.6.1:
+source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
@@ -9089,6 +9271,17 @@ tsutils@~3.21.0:
   dependencies:
     tslib "^1.8.1"
 
+tsx@^3.12.8:
+  version "3.12.8"
+  resolved "https://registry.yarnpkg.com/tsx/-/tsx-3.12.8.tgz#e9ec95c6b116e28f0187467f839029a3ce17a851"
+  integrity sha512-Lt9KYaRGF023tlLInPj8rgHwsZU8qWLBj4iRXNWxTfjIkU7canGL806AqKear1j722plHuiYNcL2ZCo6uS9UJA==
+  dependencies:
+    "@esbuild-kit/cjs-loader" "^2.4.2"
+    "@esbuild-kit/core-utils" "^3.2.2"
+    "@esbuild-kit/esm-loader" "^2.5.5"
+  optionalDependencies:
+    fsevents "~2.3.2"
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"