diff --git a/packages/synthetic-chain/package.json b/packages/synthetic-chain/package.json
index d3894e5b..5f711bf7 100644
--- a/packages/synthetic-chain/package.json
+++ b/packages/synthetic-chain/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@agoric/synthetic-chain",
-  "version": "0.0.10",
+  "version": "0.1.0",
   "description": "Utilities to build a chain and test proposals atop it",
   "bin": {
     "synthetic-chain": "dist/cli/cli.js"
diff --git a/packages/synthetic-chain/src/lib/core-eval-support.ts b/packages/synthetic-chain/src/lib/core-eval-support.ts
index fcbfc770..13355edf 100644
--- a/packages/synthetic-chain/src/lib/core-eval-support.ts
+++ b/packages/synthetic-chain/src/lib/core-eval-support.ts
@@ -36,29 +36,6 @@ export const getContractInfo = async (path: string, io = {} as any) => {
   return m.fromCapData({ body, slots });
 };
 
-// not really core-eval related
-export const testIncludes = (
-  t: ExecutionContext,
-  needle: unknown,
-  haystack: unknown[],
-  label: string,
-  sense = true,
-) => {
-  t.log(needle, sense ? 'in' : 'not in', haystack.length, label, '?');
-  const check = sense ? t.deepEqual : t.notDeepEqual;
-  if (sense) {
-    t.deepEqual(
-      haystack.filter(c => c === needle),
-      [needle],
-    );
-  } else {
-    t.deepEqual(
-      haystack.filter(c => c === needle),
-      [],
-    );
-  }
-};
-
 /**
  * @param record - e.g. { color: 'blue' }
  * @returns e.g. ['--color', 'blue']
diff --git a/packages/synthetic-chain/src/lib/vstorage.js b/packages/synthetic-chain/src/lib/vstorage.js
deleted file mode 100644
index 911d10de..00000000
--- a/packages/synthetic-chain/src/lib/vstorage.js
+++ /dev/null
@@ -1,40 +0,0 @@
-import { assert, Fail } from './assert.js';
-
-const { freeze: harden } = Object; // XXX
-
-// from '@agoric/internal/src/lib-chainStorage.js';
-const isStreamCell = cell =>
-  cell &&
-  typeof cell === 'object' &&
-  Array.isArray(cell.values) &&
-  typeof cell.blockHeight === 'string' &&
-  /^0$|^[1-9][0-9]*$/.test(cell.blockHeight);
-harden(isStreamCell);
-
-/**
- * Extract one value from a the vstorage stream cell in a QueryDataResponse
- *
- * @param {object} data
- * @param {number} [index] index of the desired value in a deserialized stream cell
- *
- * XXX import('@agoric/cosmic-proto/vstorage/query').QueryDataResponse doesn't worksomehow
- * @typedef {Awaited<ReturnType<import('@agoric/cosmic-proto/vstorage/query.js').QueryClientImpl['Data']>>} QueryDataResponseT
- */
-export const extractStreamCellValue = (data, index = -1) => {
-  const { value: serialized } = data;
-
-  serialized.length > 0 || Fail`no StreamCell values: ${data}`;
-
-  const streamCell = JSON.parse(serialized);
-  if (!isStreamCell(streamCell)) {
-    throw Fail`not a StreamCell: ${streamCell}`;
-  }
-
-  const { values } = streamCell;
-  values.length > 0 || Fail`no StreamCell values: ${streamCell}`;
-
-  const value = values.at(index);
-  assert.typeof(value, 'string');
-  return value;
-};
-harden(extractStreamCellValue);