diff --git a/packages/ddp-client/.npm/package/npm-shrinkwrap.json b/packages/ddp-client/.npm/package/npm-shrinkwrap.json
index 46fc9fb495..56bebb3f83 100644
--- a/packages/ddp-client/.npm/package/npm-shrinkwrap.json
+++ b/packages/ddp-client/.npm/package/npm-shrinkwrap.json
@@ -1,35 +1,10 @@
 {
   "lockfileVersion": 1,
   "dependencies": {
-    "faye-websocket": {
-      "version": "0.11.1",
-      "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.11.1.tgz",
-      "integrity": "sha1-8O/hjE9W5PQK/H4Gxxn9XuYYjzg="
-    },
-    "http-parser-js": {
-      "version": "0.4.6",
-      "resolved": "https://registry.npmjs.org/http-parser-js/-/http-parser-js-0.4.6.tgz",
-      "integrity": "sha1-GVJz9YcExFLWcQdr4gEyndNB3FU="
-    },
     "lolex": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/lolex/-/lolex-1.4.0.tgz",
       "integrity": "sha1-LycSsbwYDendzF06epbvPAuxYq0="
-    },
-    "permessage-deflate": {
-      "version": "0.1.6",
-      "resolved": "https://registry.npmjs.org/permessage-deflate/-/permessage-deflate-0.1.6.tgz",
-      "integrity": "sha1-WB8c7fvUQPrEfQd3vohjM4a5kt4="
-    },
-    "websocket-driver": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.0.tgz",
-      "integrity": "sha1-DK+dLXVdk67gSdS90NP+LMoqJOs="
-    },
-    "websocket-extensions": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.2.tgz",
-      "integrity": "sha1-Dhh4HeYpoYMIzhSBZQ9n/6JpOl0="
     }
   }
 }
diff --git a/packages/ddp-client/client/client.js b/packages/ddp-client/client/client.js
index f2cbc06654..fd9c746bbc 100644
--- a/packages/ddp-client/client/client.js
+++ b/packages/ddp-client/client/client.js
@@ -1,11 +1,5 @@
 export { DDP } from '../common/namespace.js';
 
-if (false) {
-  // This is used inside livedata_connection, but this is what gets
-  // it included in the client bundle
-  import './stream_client_sockjs';
-}
-
 import '../common/livedata_connection';
 
 // Initialize the default server connection and put it on Meteor.connection
diff --git a/packages/ddp-client/common/getClientStreamClass.js b/packages/ddp-client/common/getClientStreamClass.js
deleted file mode 100644
index 06c0bcfe63..0000000000
--- a/packages/ddp-client/common/getClientStreamClass.js
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Meteor } from 'meteor/meteor';
-
-// In the client and server entry points, we make sure the
-// bundler loads the correct thing. Here, we just need to
-// make sure that we require the right one.
-export default function getClientStreamClass() {
-  // The static analyzer of the bundler specifically looks
-  // for static calls to 'require', so it won't treat the
-  // below calls as a request to include that module.
-  //
-  // That means stream_client_nodejs won't be included on
-  // the client, as desired.
-  const modulePath = Meteor.isClient
-    ? '../client/stream_client_sockjs'
-    : '../server/stream_client_nodejs';
-
-  return require(modulePath).default;
-}
diff --git a/packages/ddp-client/common/livedata_connection.js b/packages/ddp-client/common/livedata_connection.js
index 3e34493ec9..aedfa26596 100644
--- a/packages/ddp-client/common/livedata_connection.js
+++ b/packages/ddp-client/common/livedata_connection.js
@@ -6,7 +6,6 @@ import { Random } from 'meteor/random';
 import { Hook } from 'meteor/callback-hook';
 import { MongoID } from 'meteor/mongo-id';
 import { DDP } from './namespace.js';
-import getClientStreamClass from './getClientStreamClass.js';
 import MethodInvoker from './MethodInvoker.js';
 import {
   hasOwn,
@@ -83,8 +82,10 @@ export class Connection {
     if (typeof url === 'object') {
       self._stream = url;
     } else {
-      self._stream = new (getClientStreamClass())(url, {
+      const { ClientStream } = require("meteor/socket-stream-client");
+      self._stream = new ClientStream(url, {
         retry: options.retry,
+        ConnectionError: DDP.ConnectionError,
         headers: options.headers,
         _sockjsOptions: options._sockjsOptions,
         // Used to keep some tests quiet, or for other cases in which
diff --git a/packages/ddp-client/package.js b/packages/ddp-client/package.js
index 5b3b2069b5..7a80a406b2 100644
--- a/packages/ddp-client/package.js
+++ b/packages/ddp-client/package.js
@@ -5,9 +5,7 @@ Package.describe({
 });
 
 Npm.depends({
-  'faye-websocket': '0.11.1',
-  lolex: '1.4.0',
-  'permessage-deflate': '0.1.6'
+  lolex: '1.4.0'
 });
 
 Package.onUse((api) => {
@@ -22,6 +20,7 @@ Package.onUse((api) => {
     'callback-hook',
     'ddp-common',
     'reload',
+    'socket-stream-client',
 
     // we depend on _diffObjects, _applyChanges,
     'diff-sequence',
@@ -73,6 +72,4 @@ Package.onTest((api) => {
   api.addFiles('test/livedata_tests.js');
   api.addFiles('test/livedata_test_service.js');
   api.addFiles('test/random_stream_tests.js');
-  api.addFiles('test/stream_tests.js', 'client');
-  api.addFiles('test/stream_client_tests.js', 'server');
 });
diff --git a/packages/ddp-client/server/server.js b/packages/ddp-client/server/server.js
index 6ca9ff0513..8566aba9c2 100644
--- a/packages/ddp-client/server/server.js
+++ b/packages/ddp-client/server/server.js
@@ -1,7 +1 @@
 export { DDP } from '../common/namespace.js';
-
-if (false) {
-  // This is used inside livedata_connection, but this is what gets
-  // it included in the server bundle
-  import './stream_client_nodejs';
-}
diff --git a/packages/socket-stream-client/.npm/package/.gitignore b/packages/socket-stream-client/.npm/package/.gitignore
new file mode 100644
index 0000000000..3c3629e647
--- /dev/null
+++ b/packages/socket-stream-client/.npm/package/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/packages/socket-stream-client/.npm/package/README b/packages/socket-stream-client/.npm/package/README
new file mode 100644
index 0000000000..3d492553a4
--- /dev/null
+++ b/packages/socket-stream-client/.npm/package/README
@@ -0,0 +1,7 @@
+This directory and the files immediately inside it are automatically generated
+when you change this package's NPM dependencies. Commit the files in this
+directory (npm-shrinkwrap.json, .gitignore, and this README) to source control
+so that others run the same versions of sub-dependencies.
+
+You should NOT check in the node_modules directory that Meteor automatically
+creates; if you are using git, the .gitignore file tells git to ignore it.
diff --git a/packages/socket-stream-client/.npm/package/npm-shrinkwrap.json b/packages/socket-stream-client/.npm/package/npm-shrinkwrap.json
new file mode 100644
index 0000000000..a1878c0efe
--- /dev/null
+++ b/packages/socket-stream-client/.npm/package/npm-shrinkwrap.json
@@ -0,0 +1,30 @@
+{
+  "lockfileVersion": 1,
+  "dependencies": {
+    "faye-websocket": {
+      "version": "0.11.1",
+      "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.11.1.tgz",
+      "integrity": "sha1-8O/hjE9W5PQK/H4Gxxn9XuYYjzg="
+    },
+    "http-parser-js": {
+      "version": "0.4.9",
+      "resolved": "https://registry.npmjs.org/http-parser-js/-/http-parser-js-0.4.9.tgz",
+      "integrity": "sha1-6hoE+2St/wJC6ZdPKX3Uw8rSceE="
+    },
+    "permessage-deflate": {
+      "version": "0.1.6",
+      "resolved": "https://registry.npmjs.org/permessage-deflate/-/permessage-deflate-0.1.6.tgz",
+      "integrity": "sha1-WB8c7fvUQPrEfQd3vohjM4a5kt4="
+    },
+    "websocket-driver": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.0.tgz",
+      "integrity": "sha1-DK+dLXVdk67gSdS90NP+LMoqJOs="
+    },
+    "websocket-extensions": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.3.tgz",
+      "integrity": "sha512-nqHUnMXmBzT0w570r2JpJxfiSD1IzoI+HGVdd3aZ0yNi3ngvQ4jv1dtHt5VGxfI2yj5yqImPhOK4vmIh2xMbGg=="
+    }
+  }
+}
diff --git a/packages/socket-stream-client/README.md b/packages/socket-stream-client/README.md
new file mode 100644
index 0000000000..3cc33d0f8c
--- /dev/null
+++ b/packages/socket-stream-client/README.md
@@ -0,0 +1,8 @@
+# socket-stream-client
+[Source code of released version](https://github.com/meteor/meteor/tree/master/packages/socket-stream-client) | [Source code of development version](https://github.com/meteor/meteor/tree/devel/packages/socket-stream-client)
+***
+
+This package provides the `ClientStream` abstraction used by the
+[`ddp-client`](https://github.com/meteor/meteor/tree/devel/packages/ddp-client)
+package.
+
diff --git a/packages/ddp-client/client/stream_client_sockjs.js b/packages/socket-stream-client/browser.js
similarity index 89%
rename from packages/ddp-client/client/stream_client_sockjs.js
rename to packages/socket-stream-client/browser.js
index f266bea1dd..6c74fc4352 100644
--- a/packages/ddp-client/client/stream_client_sockjs.js
+++ b/packages/socket-stream-client/browser.js
@@ -1,22 +1,16 @@
-import { Meteor } from 'meteor/meteor';
-import { DDP } from '../common/namespace.js';
 import {
   toSockjsUrl,
   toWebsocketUrl,
-} from '../common/urlHelpers.js';
-import StreamClientCommon from '../common/stream_client_common.js';
+} from "./urls.js";
 
-export default class ClientStream extends StreamClientCommon {
+import { StreamClientCommon } from "./common.js";
+
+export class ClientStream extends StreamClientCommon {
   // @param url {String} URL to Meteor app
   //   "http://subdomain.meteor.com/" or "/" or
   //   "ddp+sockjs://foo-**.meteor.com/sockjs"
   constructor(url, options) {
-    super();
-
-    this.options = {
-      retry: true,
-      ...options
-    };
+    super(options);
 
     this._initCommon(this.options);
 
@@ -114,8 +108,8 @@ export default class ClientStream extends StreamClientCommon {
   }
 
   _heartbeat_timeout() {
-    Meteor._debug('Connection timeout. No sockjs heartbeat received.');
-    this._lostConnection(new DDP.ConnectionError('Heartbeat timed out'));
+    console.log('Connection timeout. No sockjs heartbeat received.');
+    this._lostConnection(new this.ConnectionError("Heartbeat timed out"));
   }
 
   _heartbeat_received() {
@@ -186,11 +180,11 @@ export default class ClientStream extends StreamClientCommon {
     this.socket.onclose = () => {
       this._lostConnection();
     };
-    this.socket.onerror = () => {
+    this.socket.onerror = (...args) => {
       // XXX is this ever called?
-      Meteor._debug(
+      console.log(
         'stream error',
-        Array.from(arguments),
+        args,
         new Date().toDateString()
       );
     };
@@ -201,7 +195,9 @@ export default class ClientStream extends StreamClientCommon {
 
     if (this.connectionTimer) clearTimeout(this.connectionTimer);
     this.connectionTimer = setTimeout(() => {
-      this._lostConnection(new DDP.ConnectionError('DDP connection timed out'));
+      this._lostConnection(
+        new this.ConnectionError("DDP connection timed out")
+      );
     }, this.CONNECT_TIMEOUT);
   }
 }
diff --git a/packages/ddp-client/test/stream_tests.js b/packages/socket-stream-client/client-tests.js
similarity index 97%
rename from packages/ddp-client/test/stream_tests.js
rename to packages/socket-stream-client/client-tests.js
index 20e67bb6d5..3d207cd007 100644
--- a/packages/ddp-client/test/stream_tests.js
+++ b/packages/socket-stream-client/client-tests.js
@@ -1,7 +1,5 @@
-import { toSockjsUrl } from '../common/urlHelpers.js';
-import getClientStreamClass from '../common/getClientStreamClass.js';
-
-const ClientStream = getClientStreamClass();
+import { toSockjsUrl } from "./urls.js";
+import { ClientStream } from "meteor/socket-stream-client";
 
 Tinytest.add('stream - status', function(test) {
   // Very basic test. Just see that it runs and returns something. Not a
diff --git a/packages/ddp-client/common/stream_client_common.js b/packages/socket-stream-client/common.js
similarity index 85%
rename from packages/ddp-client/common/stream_client_common.js
rename to packages/socket-stream-client/common.js
index 8d3ac32f44..8883cacdf4 100644
--- a/packages/ddp-client/common/stream_client_common.js
+++ b/packages/socket-stream-client/common.js
@@ -1,11 +1,18 @@
-import { Random } from 'meteor/random';
-import { Meteor } from 'meteor/meteor';
-import { Tracker } from 'meteor/tracker';
 import { Retry } from 'meteor/retry';
 
-import { DDP } from './namespace.js';
+const forcedReconnectError = new Error("forced reconnect");
+
+export class StreamClientCommon {
+  constructor(options) {
+    this.options = {
+      retry: true,
+      ...(options || null),
+    };
+
+    this.ConnectionError =
+      options && options.ConnectionError || Error;
+  }
 
-export default class StreamClientCommon {
   // Register for callbacks.
   on(name, callback) {
     if (name !== 'message' && name !== 'reset' && name !== 'disconnect')
@@ -43,11 +50,14 @@ export default class StreamClientCommon {
       retryCount: 0
     };
 
-    this.statusListeners =
-      typeof Tracker !== 'undefined' && new Tracker.Dependency();
+    if (Package.tracker) {
+      this.statusListeners = new Package.tracker.Tracker.Dependency();
+    }
 
     this.statusChanged = () => {
-      if (this.statusListeners) this.statusListeners.changed();
+      if (this.statusListeners) {
+        this.statusListeners.changed();
+      }
     };
 
     //// Retry logic
@@ -69,9 +79,8 @@ export default class StreamClientCommon {
 
     if (this.currentStatus.connected) {
       if (options._force || options.url) {
-        // force reconnect.
-        this._lostConnection(new DDP.ForcedReconnectError());
-      } // else, noop.
+        this._lostConnection(forcedReconnectError);
+      }
       return;
     }
 
@@ -131,10 +140,8 @@ export default class StreamClientCommon {
 
   _retryLater(maybeError) {
     var timeout = 0;
-    if (
-      this.options.retry ||
-      (maybeError && maybeError.errorType === 'DDP.ForcedReconnectError')
-    ) {
+    if (this.options.retry ||
+        maybeError === forcedReconnectError) {
       timeout = this._retry.retryLater(
         this.currentStatus.retryCount,
         this._retryNow.bind(this)
@@ -164,7 +171,9 @@ export default class StreamClientCommon {
 
   // Get current status. Reactive.
   status() {
-    if (this.statusListeners) this.statusListeners.depend();
+    if (this.statusListeners) {
+      this.statusListeners.depend();
+    }
     return this.currentStatus;
   }
 }
diff --git a/packages/ddp-client/server/stream_client_nodejs.js b/packages/socket-stream-client/node.js
similarity index 92%
rename from packages/ddp-client/server/stream_client_nodejs.js
rename to packages/socket-stream-client/node.js
index 271789dfea..a66b45b798 100644
--- a/packages/ddp-client/server/stream_client_nodejs.js
+++ b/packages/socket-stream-client/node.js
@@ -1,7 +1,6 @@
-import { Meteor } from 'meteor/meteor';
-import { DDP } from '../common/namespace.js';
-import { toWebsocketUrl } from '../common/urlHelpers.js';
-import StreamClientCommon from '../common/stream_client_common.js';
+import { Meteor } from "meteor/meteor";
+import { toWebsocketUrl } from "./urls.js";
+import { StreamClientCommon } from "./common.js";
 
 // @param endpoint {String} URL to Meteor app
 //   "http://subdomain.meteor.com/" or "/" or
@@ -14,14 +13,9 @@ import StreamClientCommon from '../common/stream_client_common.js';
 // We don't do any heartbeating. (The logic that did this in sockjs was removed,
 // because it used a built-in sockjs mechanism. We could do it with WebSocket
 // ping frames or with DDP-level messages.)
-export default class ClientStream extends StreamClientCommon {
+export class ClientStream extends StreamClientCommon {
   constructor(endpoint, options) {
-    super();
-
-    this.options = {
-      retry: true,
-      ...(options || null),
-    };
+    super(options);
 
     this.client = null; // created in _launchConnection
     this.endpoint = endpoint;
@@ -155,7 +149,7 @@ export default class ClientStream extends StreamClientCommon {
 
     this._clearConnectionTimer();
     this.connectionTimer = Meteor.setTimeout(() => {
-      this._lostConnection(new DDP.ConnectionError('DDP connection timed out'));
+      this._lostConnection(new this.ConnectionError('DDP connection timed out'));
     }, this.CONNECT_TIMEOUT);
 
     this.client.on(
@@ -182,7 +176,7 @@ export default class ClientStream extends StreamClientCommon {
 
       // Faye's 'error' object is not a JS error (and among other things,
       // doesn't stringify well). Convert it to one.
-      this._lostConnection(new DDP.ConnectionError(error.message));
+      this._lostConnection(new this.ConnectionError(error.message));
     });
 
     clientOnIfCurrent('close', 'stream close callback', () => {
diff --git a/packages/socket-stream-client/package.js b/packages/socket-stream-client/package.js
new file mode 100644
index 0000000000..543a7950a0
--- /dev/null
+++ b/packages/socket-stream-client/package.js
@@ -0,0 +1,30 @@
+Package.describe({
+  name: "socket-stream-client",
+  version: "0.1.0",
+  summary: "Provides the ClientStream abstraction used by ddp-client",
+  documentation: "README.md"
+});
+
+Npm.depends({
+  "faye-websocket": "0.11.1",
+  "permessage-deflate": "0.1.6"
+});
+
+Package.onUse(function(api) {
+  api.use("ecmascript");
+  api.use("retry"); // TODO Try to remove this.
+  api.mainModule("browser.js", "client", { lazy: true });
+  api.mainModule("node.js", "server", { lazy: true });
+});
+
+Package.onTest(function(api) {
+  api.use("underscore");
+  api.use("ecmascript");
+  api.use("tinytest");
+  api.use("test-helpers");
+  api.use("tracker");
+  api.use("http");
+  api.use("socket-stream-client");
+  api.mainModule("client-tests.js", "client");
+  api.mainModule("server-tests.js", "server");
+});
diff --git a/packages/ddp-client/test/stream_client_tests.js b/packages/socket-stream-client/server-tests.js
similarity index 85%
rename from packages/ddp-client/test/stream_client_tests.js
rename to packages/socket-stream-client/server-tests.js
index 23a8fd1ef8..aa1ad157b6 100644
--- a/packages/ddp-client/test/stream_client_tests.js
+++ b/packages/socket-stream-client/server-tests.js
@@ -1,6 +1,5 @@
-import ClientStream from '../server/stream_client_nodejs.js';
-
-var Fiber = Npm.require('fibers');
+import { ClientStream } from "meteor/socket-stream-client";
+import Fiber from "fibers";
 
 testAsyncMulti('stream client - callbacks run in a fiber', [
   function(test, expect) {
diff --git a/packages/ddp-client/common/urlHelpers.js b/packages/socket-stream-client/urls.js
similarity index 93%
rename from packages/ddp-client/common/urlHelpers.js
rename to packages/socket-stream-client/urls.js
index 438101fa59..5f4c04f282 100644
--- a/packages/ddp-client/common/urlHelpers.js
+++ b/packages/socket-stream-client/urls.js
@@ -1,5 +1,3 @@
-import { Random } from 'meteor/random';
-
 // @param url {String} URL to Meteor app, eg:
 //   "/" or "madewith.meteor.com" or "https://foo.meteor.com"
 //   or "ddp+sockjs://ddp--****-foo.meteor.com/sockjs"
@@ -30,7 +28,7 @@ function translateUrl(url, newSchemeBase, subPath) {
     // In the host (ONLY!), change '*' characters into random digits. This
     // allows different stream connections to connect to different hostnames
     // and avoid browser per-hostname connection limits.
-    host = host.replace(/\*/g, () => Math.floor(Random.fraction() * 10));
+    host = host.replace(/\*/g, () => Math.floor(Math.random() * 10));
 
     return newScheme + '://' + host + rest;
   } else if (httpUrlMatch) {
@@ -65,6 +63,5 @@ export function toSockjsUrl(url) {
 }
 
 export function toWebsocketUrl(url) {
-  var ret = translateUrl(url, 'ws', 'websocket');
-  return ret;
+  return translateUrl(url, 'ws', 'websocket');
 }