diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..caa17e016
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.DS_Store
+.vscode
+build/
+node_modules/
+npm-debug.log
+yarn-error.log
+yarn.lock
diff --git a/gulpfile.js b/gulpfile.js
new file mode 100644
index 000000000..a64e23167
--- /dev/null
+++ b/gulpfile.js
@@ -0,0 +1,86 @@
+const gulp = require('gulp');
+const merge2 = require('merge2');
+const path = require('path');
+const sourcemaps = require('gulp-sourcemaps');
+const tslint = require('gulp-tslint');
+const typescript = require('gulp-typescript');
+
+const tslintPath = './tslint.json'
+const tsconfigPath = './tsconfig.json';
+const outDir = 'build';
+const srcGlob = 'src/**/*.ts';
+
+function onError() {}
+
+function makeCompileFn(dev) {
+  const tsSettings = dev ? {
+    noEmitOnError: false,
+    noUnusedParameters: false
+  } : {};
+  return () => {
+    const { dts, js } = gulp.src(srcGlob)
+      .pipe(sourcemaps.init())
+      .pipe(typescript.createProject(tsconfigPath, tsSettings)())
+      .on('error', onError);
+    const jsMap = js.pipe(sourcemaps.write('.', {
+      includeContent: false,
+      sourceRoot: path.relative(outDir, 'src')
+    }));
+    return merge2([
+      js.pipe(gulp.dest(`${outDir}/src`)),
+      dts.pipe(gulp.dest(`${outDir}/types`)),
+      jsMap.pipe(gulp.dest(`${outDir}/src`))
+    ]);
+  };
+}
+
+/**
+ * Runs tslint on files in src/, with linting rules defined in tslint.json.
+ */
+gulp.task('lint', () => {
+  const program = require('tslint').Linter.createProgram(tsconfigPath);
+  gulp.src(srcGlob)
+    .pipe(tslint({
+      configuration: tslintPath,
+      formatter: 'prose',
+      program
+    }))
+    .pipe(tslint.report())
+    .on('warning', onError);
+});
+
+/**
+ * Transpiles TypeScript files in src/ to JavaScript according to the settings
+ * found in tsconfig.json.
+ * Currently, all errors are emitted twice. This is being tracked here:
+ * https://github.com/ivogabe/gulp-typescript/issues/438
+ */
+gulp.task('compile', makeCompileFn(false));
+
+/**
+ * Starts watching files in src/, running the 'compile' step whenever a file
+ * changes.
+ */
+gulp.task('watch', () => {
+  gulp.start(['compile']);
+  return gulp.watch(srcGlob, ['compile']);
+});
+
+/**
+ * Transpiles source code with relaxed requirements:
+ * - Emit output even if there are type-checking errors (this is a workaround
+ *   for the twice-emitted errors in the 'compile' step)
+ * - Do not emit errors for unused parameters
+ */
+gulp.task('dev.compile', makeCompileFn(true));
+
+/**
+ * Watches files similar to the 'watch' step, but runs the 'dev.compile' step
+ * instead.
+ */
+gulp.task('dev.watch', () => {
+  gulp.start(['dev.compile']);
+  return gulp.watch(srcGlob, ['dev.compile']);
+});
+
+gulp.task('default', ['compile']);
diff --git a/package.json b/package.json
new file mode 100644
index 000000000..aad00844a
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "grpc-js",
+  "version": "0.1.0",
+  "description": "gRPC Library for Node - pure JS",
+  "homepage": "https://grpc.io/",
+  "main": "index.js",
+  "private": true,
+  "engines": {
+    "node": ">=8.3"
+  },
+  "keywords": [],
+  "author": "Google Inc.",
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "@types/node": "^8.0.17",
+    "clang-format": "^1.0.53",
+    "gulp": "^3.9.1",
+    "gulp-sourcemaps": "^2.6.0",
+    "gulp-tslint": "^8.1.1",
+    "gulp-typescript": "^3.2.1",
+    "merge2": "^1.1.0",
+    "typescript": "^2.4.2"
+  }
+}
diff --git a/src/call-credentials.ts b/src/call-credentials.ts
new file mode 100644
index 000000000..89f782e16
--- /dev/null
+++ b/src/call-credentials.ts
@@ -0,0 +1 @@
+export class CallCredentials {}
diff --git a/src/call-stream.ts b/src/call-stream.ts
new file mode 100644
index 000000000..16c5348d5
--- /dev/null
+++ b/src/call-stream.ts
@@ -0,0 +1,14 @@
+import * as stream from 'stream';
+import { Status } from './constants';
+
+/**
+ * This class represents a duplex stream associated with a single gRPC call.
+ */
+export class CallStream extends stream.Duplex {
+  /**
+   * Cancels the call associated with this stream with a given status.
+   */
+  cancelWithStatus(status: Status) {
+    throw new Error();
+  }
+}
diff --git a/src/channel-credentials.ts b/src/channel-credentials.ts
new file mode 100644
index 000000000..75d72802a
--- /dev/null
+++ b/src/channel-credentials.ts
@@ -0,0 +1,20 @@
+import { CallCredentials } from './call-credentials';
+
+/**
+ * A class that contains credentials for communicating over a channel.
+ */
+export class ChannelCredentials {
+  private constructor() {}
+
+  static createSsl(rootCerts: Buffer, privateKey?: Buffer, certChain?: Buffer) : ChannelCredentials {
+    throw new Error();
+  }
+
+  static createInsecure() : ChannelCredentials {
+    throw new Error();
+  }
+
+  compose(callCredentials: CallCredentials) : ChannelCredentials {
+    throw new Error();
+  }
+}
diff --git a/src/channel.ts b/src/channel.ts
new file mode 100644
index 000000000..28c91738f
--- /dev/null
+++ b/src/channel.ts
@@ -0,0 +1,25 @@
+import { CallStream } from './call-stream';
+import { ChannelCredentials } from './channel-credentials';
+import { Metadata } from './metadata';
+
+/**
+ * An interface that contains options used when initializing a Channel instance.
+ */
+export interface ChannelOptions {}
+
+/**
+ * A class that represents a communication channel to a server specified by a given address.
+ */
+export class Channel {
+  constructor(address: string, credentials?: ChannelCredentials, options?: ChannelOptions) {
+    throw new Error();
+  }
+
+  createStream(methodName: string, metadata: Metadata) : CallStream {
+    throw new Error();
+  }
+
+  close() {
+    throw new Error();
+  }
+}
diff --git a/src/constants.ts b/src/constants.ts
new file mode 100644
index 000000000..a72f3388d
--- /dev/null
+++ b/src/constants.ts
@@ -0,0 +1,19 @@
+export enum Status {
+  OK = 0,
+  CANCELLED,
+  UNKNOWN,
+  INVALID_ARGUMENT,
+  DEADLINE_EXCEEDED,
+  NOT_FOUND,
+  ALREADY_EXISTS,
+  PERMISSION_DENIED,
+  RESOURCE_EXHAUSTED,
+  FAILED_PRECONDITION,
+  ABORTED,
+  OUT_OF_RANGE,
+  UNIMPLEMENTED,
+  INTERNAL,
+  UNAVAILABLE,
+  DATA_LOSS,
+  UNAUTHENTICATED
+}
diff --git a/src/metadata.ts b/src/metadata.ts
new file mode 100644
index 000000000..2845639cf
--- /dev/null
+++ b/src/metadata.ts
@@ -0,0 +1 @@
+export class Metadata {}