diff --git a/CHANGELOG.md b/CHANGELOG.md
index b490b297a6f5..f837ab9f2d01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
 
 ### Chore & Maintenance
 
+- `[jest-cli]` [**BREAKING**] Move everything not related to CLI args parsing into a new `@jest/core` package ([#7696](https://github.com/facebook/jest/pull/7696))
 - `[*]`: Setup building, linting and testing of TypeScript ([#7808](https://github.com/facebook/jest/pull/7808), [#7855](https://github.com/facebook/jest/pull/7855))
 - `[pretty-format]`: Migrate to TypeScript ([#7809](https://github.com/facebook/jest/pull/7809))
 - `[diff-sequences]`: Migrate to Typescript ([#7820](https://github.com/facebook/jest/pull/7820))
@@ -42,6 +43,7 @@
 - `[jest-snapshot]`: Migrate to TypeScript ([#7899](https://github.com/facebook/jest/pull/7899))
 - `[@jest/transform]`: New package extracted from `jest-runtime` ([#7915](https://github.com/facebook/jest/pull/7915))
 - `[babel-plugin-jest-hoist]`: Migrate to TypeScript ([#7898](https://github.com/facebook/jest/pull/7898))
+- `[@jest/core]` Create new package, which is `jest-cli` minus `yargs` and `prompts` ([#7696](https://github.com/facebook/jest/pull/7696))
 
 ### Performance
 
diff --git a/jest.config.js b/jest.config.js
index db041ad091ae..7bda2df4675a 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -39,9 +39,9 @@ module.exports = {
     '/packages/.*/build',
     '/packages/.*/build-es5',
     '/packages/.*/src/__tests__/setPrettyPrint.ts',
-    '/packages/jest-cli/src/__tests__/test_root',
-    '/packages/jest-cli/src/__tests__/__fixtures__/',
-    '/packages/jest-cli/src/lib/__tests__/fixtures/',
+    '/packages/jest-core/src/__tests__/test_root',
+    '/packages/jest-core/src/__tests__/__fixtures__/',
+    '/packages/jest-cli/src/init/__tests__/fixtures/',
     '/packages/jest-haste-map/src/__tests__/haste_impl.js',
     '/packages/jest-haste-map/src/__tests__/dependencyExtractor.js',
     '/packages/jest-resolve-dependencies/src/__tests__/__fixtures__/',
diff --git a/packages/jest-cli/package.json b/packages/jest-cli/package.json
index 4267412020a5..3b37a7743958 100644
--- a/packages/jest-cli/package.json
+++ b/packages/jest-cli/package.json
@@ -2,54 +2,24 @@
   "name": "jest-cli",
   "description": "Delightful JavaScript Testing.",
   "version": "24.1.0",
-  "main": "build/jest.js",
+  "main": "build/index.js",
   "dependencies": {
-    "@jest/reporters": "^24.1.0",
-    "@jest/transform": "^24.1.0",
-    "ansi-escapes": "^3.0.0",
+    "@jest/core": "^24.1.0",
     "chalk": "^2.0.1",
     "exit": "^0.1.2",
-    "glob": "^7.1.2",
-    "graceful-fs": "^4.1.15",
     "import-local": "^2.0.0",
     "is-ci": "^2.0.0",
-    "jest-changed-files": "^24.0.0",
     "jest-config": "^24.1.0",
-    "jest-environment-jsdom": "^24.0.0",
-    "jest-get-type": "^24.0.0",
-    "jest-haste-map": "^24.0.0",
-    "jest-message-util": "^24.0.0",
-    "jest-regex-util": "^24.0.0",
-    "jest-resolve-dependencies": "^24.1.0",
-    "jest-runner": "^24.1.0",
-    "jest-runtime": "^24.1.0",
-    "jest-snapshot": "^24.1.0",
     "jest-util": "^24.0.0",
     "jest-validate": "^24.0.0",
-    "jest-watcher": "^24.0.0",
-    "micromatch": "^3.1.10",
-    "p-each-series": "^1.0.0",
-    "pirates": "^4.0.0",
     "prompts": "^2.0.1",
     "realpath-native": "^1.1.0",
-    "rimraf": "^2.5.4",
-    "string-length": "^2.0.0",
-    "strip-ansi": "^5.0.0",
-    "which": "^1.2.12",
     "yargs": "^12.0.2"
   },
   "devDependencies": {
-    "@types/ansi-escapes": "^3.0.0",
     "@types/exit": "^0.1.30",
-    "@types/glob": "^7.1.1",
-    "@types/graceful-fs": "^4.1.2",
     "@types/is-ci": "^1.1.0",
-    "@types/micromatch": "^3.1.0",
     "@types/prompts": "^1.2.0",
-    "@types/rimraf": "^2.0.2",
-    "@types/string-length": "^2.0.0",
-    "@types/strip-ansi": "^3.0.0",
-    "@types/which": "^1.3.1",
     "@types/yargs": "^12.0.2"
   },
   "bin": {
diff --git a/packages/jest-cli/src/cli/index.js b/packages/jest-cli/src/cli/index.js
index 69a3ba889d78..910cc7f10fa8 100644
--- a/packages/jest-cli/src/cli/index.js
+++ b/packages/jest-cli/src/cli/index.js
@@ -12,34 +12,23 @@ import type {Argv} from 'types/Argv';
 import type {GlobalConfig, Path} from 'types/Config';
 
 import path from 'path';
-import {Console, clearLine, createDirectory, preRunMessage} from 'jest-util';
+import {clearLine} from 'jest-util';
 import {validateCLIOptions} from 'jest-validate';
-import {readConfigs, deprecationEntries} from 'jest-config';
+import {deprecationEntries} from 'jest-config';
+import {runCLI} from '@jest/core';
 import * as args from './args';
 import chalk from 'chalk';
-import createContext from '../lib/create_context';
 import exit from 'exit';
-import getChangedFilesPromise from '../getChangedFilesPromise';
-import {formatHandleErrors} from '../collectHandles';
-import handleDeprecationWarnings from '../lib/handle_deprecation_warnings';
-import runJest from '../runJest';
-import Runtime from 'jest-runtime';
-import TestWatcher from '../TestWatcher';
-import watch from '../watch';
-import pluralize from '../pluralize';
 import yargs from 'yargs';
-import rimraf from 'rimraf';
 import {sync as realpath} from 'realpath-native';
-import init from '../lib/init';
-import logDebugMessages from '../lib/log_debug_messages';
-import getVersion from '../version';
+import init from '../init';
 
-const {print: preRunMessagePrint} = preRunMessage;
+import {version as VERSION} from '../../package.json';
 
 export async function run(maybeArgv?: Argv, project?: Path) {
   try {
     // $FlowFixMe:`allow reduced return
-    const argv: Argv = buildArgv(maybeArgv, project);
+    const argv: Argv = buildArgv(maybeArgv);
 
     if (argv.init) {
       await init();
@@ -59,129 +48,9 @@ export async function run(maybeArgv?: Argv, project?: Path) {
   }
 }
 
-export const runCLI = async (
-  argv: Argv,
-  projects: Array<Path>,
-): Promise<{results: AggregatedResult, globalConfig: GlobalConfig}> => {
-  const realFs = require('fs');
-  const fs = require('graceful-fs');
-  fs.gracefulify(realFs);
-
-  let results;
-
-  // If we output a JSON object, we can't write anything to stdout, since
-  // it'll break the JSON structure and it won't be valid.
-  const outputStream =
-    argv.json || argv.useStderr ? process.stderr : process.stdout;
-
-  const {globalConfig, configs, hasDeprecationWarnings} = readConfigs(
-    argv,
-    projects,
-  );
-
-  if (argv.debug) {
-    logDebugMessages(globalConfig, configs, outputStream);
-  }
-
-  if (argv.showConfig) {
-    logDebugMessages(globalConfig, configs, process.stdout);
-    exit(0);
-  }
-
-  if (argv.clearCache) {
-    configs.forEach(config => {
-      rimraf.sync(config.cacheDirectory);
-      process.stdout.write(`Cleared ${config.cacheDirectory}\n`);
-    });
-
-    exit(0);
-  }
-
-  await _run(
-    globalConfig,
-    configs,
-    hasDeprecationWarnings,
-    outputStream,
-    (r: AggregatedResult) => (results = r),
-  );
-
-  if (argv.watch || argv.watchAll) {
-    // If in watch mode, return the promise that will never resolve.
-    // If the watch mode is interrupted, watch should handle the process
-    // shutdown.
-    return new Promise(() => {});
-  }
-
-  if (!results) {
-    throw new Error(
-      'AggregatedResult must be present after test run is complete',
-    );
-  }
-
-  const {openHandles} = results;
-
-  if (openHandles && openHandles.length) {
-    const formatted = formatHandleErrors(openHandles, configs[0]);
-
-    const openHandlesString = pluralize('open handle', formatted.length, 's');
-
-    const message =
-      chalk.red(
-        `\nJest has detected the following ${openHandlesString} potentially keeping Jest from exiting:\n\n`,
-      ) + formatted.join('\n\n');
-
-    console.error(message);
-  }
-
-  return Promise.resolve({globalConfig, results});
-};
-
-const readResultsAndExit = (
-  result: ?AggregatedResult,
-  globalConfig: GlobalConfig,
-) => {
-  const code = !result || result.success ? 0 : globalConfig.testFailureExitCode;
-
-  // Only exit if needed
-  process.on('exit', () => {
-    if (typeof code === 'number' && code !== 0) {
-      process.exitCode = code;
-    }
-  });
-
-  if (globalConfig.forceExit) {
-    if (!globalConfig.detectOpenHandles) {
-      console.error(
-        chalk.red.bold('Force exiting Jest\n\n') +
-          chalk.red(
-            'Have you considered using `--detectOpenHandles` to detect ' +
-              'async operations that kept running after all tests finished?',
-          ),
-      );
-    }
-
-    exit(code);
-  } else if (!globalConfig.detectOpenHandles) {
-    setTimeout(() => {
-      console.error(
-        chalk.red.bold(
-          'Jest did not exit one second after the test run has completed.\n\n',
-        ) +
-          chalk.red(
-            'This usually means that there are asynchronous operations that ' +
-              "weren't stopped in your tests. Consider running Jest with " +
-              '`--detectOpenHandles` to troubleshoot this issue.',
-          ),
-      );
-      // $FlowFixMe: `unref` exists in Node
-    }, 1000).unref();
-  }
-};
-
-export const buildArgv = (maybeArgv: ?Argv, project: ?Path) => {
+export const buildArgv = (maybeArgv: ?Argv) => {
   const version =
-    getVersion() +
-    (__dirname.includes(`packages${path.sep}jest-cli`) ? '-dev' : '');
+    VERSION + (__dirname.includes(`packages${path.sep}jest-cli`) ? '-dev' : '');
 
   const rawArgv: Argv | string[] = maybeArgv || process.argv.slice(2);
   const argv: Argv = yargs(rawArgv)
@@ -234,108 +103,44 @@ const getProjectListFromCLIArgs = (argv, project: ?Path) => {
   return projects;
 };
 
-const buildContextsAndHasteMaps = async (
-  configs,
-  globalConfig,
-  outputStream,
-) => {
-  const hasteMapInstances = Array(configs.length);
-  const contexts = await Promise.all(
-    configs.map(async (config, index) => {
-      createDirectory(config.cacheDirectory);
-      const hasteMapInstance = Runtime.createHasteMap(config, {
-        console: new Console(outputStream, outputStream),
-        maxWorkers: globalConfig.maxWorkers,
-        resetCache: !config.cache,
-        watch: globalConfig.watch || globalConfig.watchAll,
-        watchman: globalConfig.watchman,
-      });
-      hasteMapInstances[index] = hasteMapInstance;
-      return createContext(config, await hasteMapInstance.build());
-    }),
-  );
-
-  return {contexts, hasteMapInstances};
-};
-
-const _run = async (
-  globalConfig,
-  configs,
-  hasDeprecationWarnings,
-  outputStream,
-  onComplete,
+const readResultsAndExit = (
+  result: ?AggregatedResult,
+  globalConfig: GlobalConfig,
 ) => {
-  // Queries to hg/git can take a while, so we need to start the process
-  // as soon as possible, so by the time we need the result it's already there.
-  const changedFilesPromise = getChangedFilesPromise(globalConfig, configs);
+  const code = !result || result.success ? 0 : globalConfig.testFailureExitCode;
 
-  const {contexts, hasteMapInstances} = await buildContextsAndHasteMaps(
-    configs,
-    globalConfig,
-    outputStream,
-  );
+  // Only exit if needed
+  process.on('exit', () => {
+    if (typeof code === 'number' && code !== 0) {
+      process.exitCode = code;
+    }
+  });
 
-  globalConfig.watch || globalConfig.watchAll
-    ? await runWatch(
-        contexts,
-        configs,
-        hasDeprecationWarnings,
-        globalConfig,
-        outputStream,
-        hasteMapInstances,
-        changedFilesPromise,
-      )
-    : await runWithoutWatch(
-        globalConfig,
-        contexts,
-        outputStream,
-        onComplete,
-        changedFilesPromise,
+  if (globalConfig.forceExit) {
+    if (!globalConfig.detectOpenHandles) {
+      console.error(
+        chalk.red.bold('Force exiting Jest\n\n') +
+          chalk.red(
+            'Have you considered using `--detectOpenHandles` to detect ' +
+              'async operations that kept running after all tests finished?',
+          ),
       );
-};
-
-const runWatch = async (
-  contexts,
-  configs,
-  hasDeprecationWarnings,
-  globalConfig,
-  outputStream,
-  hasteMapInstances,
-  changedFilesPromise,
-) => {
-  if (hasDeprecationWarnings) {
-    try {
-      await handleDeprecationWarnings(outputStream, process.stdin);
-      return watch(globalConfig, contexts, outputStream, hasteMapInstances);
-    } catch (e) {
-      exit(0);
     }
-  }
-
-  return watch(globalConfig, contexts, outputStream, hasteMapInstances);
-};
 
-const runWithoutWatch = async (
-  globalConfig,
-  contexts,
-  outputStream,
-  onComplete,
-  changedFilesPromise,
-) => {
-  const startRun = async () => {
-    if (!globalConfig.listTests) {
-      preRunMessagePrint(outputStream);
-    }
-    return await runJest({
-      changedFilesPromise,
-      contexts,
-      failedTestsCache: null,
-      globalConfig,
-      onComplete,
-      outputStream,
-      startRun,
-      testWatcher: new TestWatcher({isWatchMode: false}),
-    });
-  };
-  return await startRun();
+    exit(code);
+  } else if (!globalConfig.detectOpenHandles) {
+    setTimeout(() => {
+      console.error(
+        chalk.red.bold(
+          'Jest did not exit one second after the test run has completed.\n\n',
+        ) +
+          chalk.red(
+            'This usually means that there are asynchronous operations that ' +
+              "weren't stopped in your tests. Consider running Jest with " +
+              '`--detectOpenHandles` to troubleshoot this issue.',
+          ),
+      );
+      // $FlowFixMe: `unref` exists in Node
+    }, 1000).unref();
+  }
 };
diff --git a/packages/jest-cli/src/index.js b/packages/jest-cli/src/index.js
new file mode 100644
index 000000000000..994257106ce6
--- /dev/null
+++ b/packages/jest-cli/src/index.js
@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+export {run} from './cli';
diff --git a/packages/jest-cli/src/lib/__tests__/__snapshots__/init.test.js.snap b/packages/jest-cli/src/init/__tests__/__snapshots__/init.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/__snapshots__/init.test.js.snap
rename to packages/jest-cli/src/init/__tests__/__snapshots__/init.test.js.snap
diff --git a/packages/jest-cli/src/lib/__tests__/__snapshots__/modify_package_json.test.js.snap b/packages/jest-cli/src/init/__tests__/__snapshots__/modify_package_json.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/__snapshots__/modify_package_json.test.js.snap
rename to packages/jest-cli/src/init/__tests__/__snapshots__/modify_package_json.test.js.snap
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/has_jest_config_file/jest.config.js b/packages/jest-cli/src/init/__tests__/fixtures/has_jest_config_file/jest.config.js
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/has_jest_config_file/jest.config.js
rename to packages/jest-cli/src/init/__tests__/fixtures/has_jest_config_file/jest.config.js
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/has_jest_config_file/package.json b/packages/jest-cli/src/init/__tests__/fixtures/has_jest_config_file/package.json
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/has_jest_config_file/package.json
rename to packages/jest-cli/src/init/__tests__/fixtures/has_jest_config_file/package.json
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/has_jest_config_in_package_json/package.json b/packages/jest-cli/src/init/__tests__/fixtures/has_jest_config_in_package_json/package.json
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/has_jest_config_in_package_json/package.json
rename to packages/jest-cli/src/init/__tests__/fixtures/has_jest_config_in_package_json/package.json
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/no_package_json/index.js b/packages/jest-cli/src/init/__tests__/fixtures/no_package_json/index.js
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/no_package_json/index.js
rename to packages/jest-cli/src/init/__tests__/fixtures/no_package_json/index.js
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/only_package_json/package.json b/packages/jest-cli/src/init/__tests__/fixtures/only_package_json/package.json
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/only_package_json/package.json
rename to packages/jest-cli/src/init/__tests__/fixtures/only_package_json/package.json
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/test_script_configured/package.json b/packages/jest-cli/src/init/__tests__/fixtures/test_script_configured/package.json
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/test_script_configured/package.json
rename to packages/jest-cli/src/init/__tests__/fixtures/test_script_configured/package.json
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/typescript_in_dependencies/package.json b/packages/jest-cli/src/init/__tests__/fixtures/typescript_in_dependencies/package.json
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/typescript_in_dependencies/package.json
rename to packages/jest-cli/src/init/__tests__/fixtures/typescript_in_dependencies/package.json
diff --git a/packages/jest-cli/src/lib/__tests__/fixtures/typescript_in_dev_dependencies/package.json b/packages/jest-cli/src/init/__tests__/fixtures/typescript_in_dev_dependencies/package.json
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/fixtures/typescript_in_dev_dependencies/package.json
rename to packages/jest-cli/src/init/__tests__/fixtures/typescript_in_dev_dependencies/package.json
diff --git a/packages/jest-cli/src/lib/__tests__/init.test.js b/packages/jest-cli/src/init/__tests__/init.test.js
similarity index 99%
rename from packages/jest-cli/src/lib/__tests__/init.test.js
rename to packages/jest-cli/src/init/__tests__/init.test.js
index 277fa89d5ffc..d10629e6153a 100644
--- a/packages/jest-cli/src/lib/__tests__/init.test.js
+++ b/packages/jest-cli/src/init/__tests__/init.test.js
@@ -11,7 +11,7 @@
 import fs from 'fs';
 import path from 'path';
 import prompts from 'prompts';
-import init from '../init';
+import init from '../';
 
 jest.mock('prompts');
 jest.mock('../../../../jest-config/build/getCacheDirectory', () => () =>
diff --git a/packages/jest-cli/src/lib/__tests__/modify_package_json.test.js b/packages/jest-cli/src/init/__tests__/modify_package_json.test.js
similarity index 94%
rename from packages/jest-cli/src/lib/__tests__/modify_package_json.test.js
rename to packages/jest-cli/src/init/__tests__/modify_package_json.test.js
index bd1ce0cf0a21..aa2f8f4641f4 100644
--- a/packages/jest-cli/src/lib/__tests__/modify_package_json.test.js
+++ b/packages/jest-cli/src/init/__tests__/modify_package_json.test.js
@@ -6,7 +6,7 @@
  *
  */
 
-import modifyPackageJson from '../init/modify_package_json';
+import modifyPackageJson from '../modify_package_json';
 
 test('should remove jest config if exists', () => {
   expect(
diff --git a/packages/jest-cli/src/constants.js b/packages/jest-cli/src/init/constants.js
similarity index 100%
rename from packages/jest-cli/src/constants.js
rename to packages/jest-cli/src/init/constants.js
diff --git a/packages/jest-cli/src/lib/init/errors.js b/packages/jest-cli/src/init/errors.js
similarity index 100%
rename from packages/jest-cli/src/lib/init/errors.js
rename to packages/jest-cli/src/init/errors.js
diff --git a/packages/jest-cli/src/lib/init/generate_config_file.js b/packages/jest-cli/src/init/generate_config_file.js
similarity index 100%
rename from packages/jest-cli/src/lib/init/generate_config_file.js
rename to packages/jest-cli/src/init/generate_config_file.js
diff --git a/packages/jest-cli/src/lib/init/index.js b/packages/jest-cli/src/init/index.js
similarity index 98%
rename from packages/jest-cli/src/lib/init/index.js
rename to packages/jest-cli/src/init/index.js
index 4ae03318470e..68dd9f4fa640 100644
--- a/packages/jest-cli/src/lib/init/index.js
+++ b/packages/jest-cli/src/init/index.js
@@ -14,7 +14,7 @@ import prompts from 'prompts';
 import {sync as realpath} from 'realpath-native';
 import defaultQuestions, {testScriptQuestion} from './questions';
 import {NotFoundPackageJsonError, MalformedPackageJsonError} from './errors';
-import {PACKAGE_JSON, JEST_CONFIG} from '../../constants';
+import {PACKAGE_JSON, JEST_CONFIG} from './constants';
 import generateConfigFile from './generate_config_file';
 import modifyPackageJson from './modify_package_json';
 
diff --git a/packages/jest-cli/src/lib/init/modify_package_json.js b/packages/jest-cli/src/init/modify_package_json.js
similarity index 100%
rename from packages/jest-cli/src/lib/init/modify_package_json.js
rename to packages/jest-cli/src/init/modify_package_json.js
diff --git a/packages/jest-cli/src/lib/init/questions.js b/packages/jest-cli/src/init/questions.js
similarity index 100%
rename from packages/jest-cli/src/lib/init/questions.js
rename to packages/jest-cli/src/init/questions.js
diff --git a/packages/jest-cli/src/jest.js b/packages/jest-cli/src/jest.js
deleted file mode 100644
index 22210bef096e..000000000000
--- a/packages/jest-cli/src/jest.js
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow
- */
-
-import SearchSource from './SearchSource';
-import TestScheduler from './TestScheduler';
-import TestWatcher from './TestWatcher';
-import {run, runCLI} from './cli';
-import getVersion from './version';
-
-module.exports = {
-  SearchSource,
-  TestScheduler,
-  TestWatcher,
-  getVersion,
-  run,
-  runCLI,
-};
diff --git a/packages/jest-core/.npmignore b/packages/jest-core/.npmignore
new file mode 100644
index 000000000000..85e48fe7b0a4
--- /dev/null
+++ b/packages/jest-core/.npmignore
@@ -0,0 +1,3 @@
+**/__mocks__/**
+**/__tests__/**
+src
diff --git a/packages/jest-core/README.md b/packages/jest-core/README.md
new file mode 100644
index 000000000000..29dd758bb3c8
--- /dev/null
+++ b/packages/jest-core/README.md
@@ -0,0 +1,3 @@
+# @jest/core
+
+Jest is currently working on providing a programmatic API. This is under developemnt, and usage of this package directly is currently not supported.
diff --git a/packages/jest-core/package.json b/packages/jest-core/package.json
new file mode 100644
index 000000000000..824efb42b9b9
--- /dev/null
+++ b/packages/jest-core/package.json
@@ -0,0 +1,82 @@
+{
+  "name": "@jest/core",
+  "description": "Delightful JavaScript Testing.",
+  "version": "24.1.0",
+  "main": "build/jest.js",
+  "dependencies": {
+    "@jest/reporters": "^24.1.0",
+    "@jest/transform": "^24.1.0",
+    "ansi-escapes": "^3.0.0",
+    "chalk": "^2.0.1",
+    "exit": "^0.1.2",
+    "glob": "^7.1.2",
+    "graceful-fs": "^4.1.15",
+    "jest-changed-files": "^24.0.0",
+    "jest-config": "^24.1.0",
+    "jest-environment-jsdom": "^24.0.0",
+    "jest-get-type": "^24.0.0",
+    "jest-haste-map": "^24.0.0",
+    "jest-message-util": "^24.0.0",
+    "jest-regex-util": "^24.0.0",
+    "jest-resolve-dependencies": "^24.1.0",
+    "jest-runner": "^24.1.0",
+    "jest-runtime": "^24.1.0",
+    "jest-snapshot": "^24.1.0",
+    "jest-util": "^24.0.0",
+    "jest-validate": "^24.0.0",
+    "jest-watcher": "^24.0.0",
+    "micromatch": "^3.1.10",
+    "p-each-series": "^1.0.0",
+    "pirates": "^4.0.0",
+    "realpath-native": "^1.1.0",
+    "rimraf": "^2.5.4",
+    "strip-ansi": "^5.0.0"
+  },
+  "devDependencies": {
+    "@types/ansi-escapes": "^3.0.0",
+    "@types/exit": "^0.1.30",
+    "@types/glob": "^7.1.1",
+    "@types/graceful-fs": "^4.1.2",
+    "@types/micromatch": "^3.1.0",
+    "@types/rimraf": "^2.0.2"
+  },
+  "engines": {
+    "node": ">= 6"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/facebook/jest",
+    "directory": "packages/jest-core"
+  },
+  "bugs": {
+    "url": "https://github.com/facebook/jest/issues"
+  },
+  "homepage": "https://jestjs.io/",
+  "license": "MIT",
+  "keywords": [
+    "ava",
+    "babel",
+    "coverage",
+    "easy",
+    "expect",
+    "facebook",
+    "immersive",
+    "instant",
+    "jasmine",
+    "jest",
+    "jsdom",
+    "mocha",
+    "mocking",
+    "painless",
+    "qunit",
+    "runner",
+    "sandboxed",
+    "snapshot",
+    "tap",
+    "tape",
+    "test",
+    "testing",
+    "typescript",
+    "watch"
+  ]
+}
diff --git a/packages/jest-cli/src/FailedTestsCache.js b/packages/jest-core/src/FailedTestsCache.js
similarity index 100%
rename from packages/jest-cli/src/FailedTestsCache.js
rename to packages/jest-core/src/FailedTestsCache.js
diff --git a/packages/jest-cli/src/ReporterDispatcher.js b/packages/jest-core/src/ReporterDispatcher.js
similarity index 100%
rename from packages/jest-cli/src/ReporterDispatcher.js
rename to packages/jest-core/src/ReporterDispatcher.js
diff --git a/packages/jest-cli/src/SearchSource.js b/packages/jest-core/src/SearchSource.js
similarity index 100%
rename from packages/jest-cli/src/SearchSource.js
rename to packages/jest-core/src/SearchSource.js
diff --git a/packages/jest-cli/src/SnapshotInteractiveMode.js b/packages/jest-core/src/SnapshotInteractiveMode.js
similarity index 100%
rename from packages/jest-cli/src/SnapshotInteractiveMode.js
rename to packages/jest-core/src/SnapshotInteractiveMode.js
diff --git a/packages/jest-cli/src/TestNamePatternPrompt.js b/packages/jest-core/src/TestNamePatternPrompt.js
similarity index 100%
rename from packages/jest-cli/src/TestNamePatternPrompt.js
rename to packages/jest-core/src/TestNamePatternPrompt.js
diff --git a/packages/jest-cli/src/TestPathPatternPrompt.js b/packages/jest-core/src/TestPathPatternPrompt.js
similarity index 100%
rename from packages/jest-cli/src/TestPathPatternPrompt.js
rename to packages/jest-core/src/TestPathPatternPrompt.js
diff --git a/packages/jest-cli/src/TestScheduler.js b/packages/jest-core/src/TestScheduler.js
similarity index 100%
rename from packages/jest-cli/src/TestScheduler.js
rename to packages/jest-core/src/TestScheduler.js
diff --git a/packages/jest-cli/src/TestSequencer.js b/packages/jest-core/src/TestSequencer.js
similarity index 100%
rename from packages/jest-cli/src/TestSequencer.js
rename to packages/jest-core/src/TestSequencer.js
diff --git a/packages/jest-cli/src/TestWatcher.js b/packages/jest-core/src/TestWatcher.js
similarity index 100%
rename from packages/jest-cli/src/TestWatcher.js
rename to packages/jest-core/src/TestWatcher.js
diff --git a/packages/jest-cli/src/__tests__/FailedTestsCache.test.js b/packages/jest-core/src/__tests__/FailedTestsCache.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/FailedTestsCache.test.js
rename to packages/jest-core/src/__tests__/FailedTestsCache.test.js
diff --git a/packages/jest-cli/src/__tests__/SearchSource.test.js b/packages/jest-core/src/__tests__/SearchSource.test.js
similarity index 98%
rename from packages/jest-cli/src/__tests__/SearchSource.test.js
rename to packages/jest-core/src/__tests__/SearchSource.test.js
index 0f010a136e3d..d3ed9b7117a0 100644
--- a/packages/jest-cli/src/__tests__/SearchSource.test.js
+++ b/packages/jest-core/src/__tests__/SearchSource.test.js
@@ -471,7 +471,7 @@ describe('SearchSource', () => {
     });
 
     it('finds tests for a single file', () => {
-      const input = ['packages/jest-cli/src/__tests__/test_root/module.jsx'];
+      const input = ['packages/jest-core/src/__tests__/test_root/module.jsx'];
       const data = searchSource.findRelatedTestsFromPattern(input);
       expect(toPaths(data.tests).sort()).toEqual([
         path.join(rootDir, '__testtests__', 'test.js'),
@@ -481,8 +481,8 @@ describe('SearchSource', () => {
 
     it('finds tests for multiple files', () => {
       const input = [
-        'packages/jest-cli/src/__tests__/test_root/module.jsx',
-        'packages/jest-cli/src/__tests__/test_root/module.foobar',
+        'packages/jest-core/src/__tests__/test_root/module.jsx',
+        'packages/jest-core/src/__tests__/test_root/module.foobar',
       ];
       const data = searchSource.findRelatedTestsFromPattern(input);
       expect(toPaths(data.tests).sort()).toEqual([
diff --git a/packages/jest-cli/src/__tests__/SnapshotInteractiveMode.test.js b/packages/jest-core/src/__tests__/SnapshotInteractiveMode.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/SnapshotInteractiveMode.test.js
rename to packages/jest-core/src/__tests__/SnapshotInteractiveMode.test.js
diff --git a/packages/jest-cli/src/__tests__/TestScheduler.test.js b/packages/jest-core/src/__tests__/TestScheduler.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/TestScheduler.test.js
rename to packages/jest-core/src/__tests__/TestScheduler.test.js
diff --git a/packages/jest-cli/src/__tests__/__fixtures__/watch_plugin.js b/packages/jest-core/src/__tests__/__fixtures__/watch_plugin.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/__fixtures__/watch_plugin.js
rename to packages/jest-core/src/__tests__/__fixtures__/watch_plugin.js
diff --git a/packages/jest-cli/src/__tests__/__fixtures__/watch_plugin2.js b/packages/jest-core/src/__tests__/__fixtures__/watch_plugin2.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/__fixtures__/watch_plugin2.js
rename to packages/jest-core/src/__tests__/__fixtures__/watch_plugin2.js
diff --git a/packages/jest-cli/src/__tests__/__snapshots__/SnapshotInteractiveMode.test.js.snap b/packages/jest-core/src/__tests__/__snapshots__/SnapshotInteractiveMode.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/__tests__/__snapshots__/SnapshotInteractiveMode.test.js.snap
rename to packages/jest-core/src/__tests__/__snapshots__/SnapshotInteractiveMode.test.js.snap
diff --git a/packages/jest-cli/src/__tests__/__snapshots__/watch.test.js.snap b/packages/jest-core/src/__tests__/__snapshots__/watch.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/__tests__/__snapshots__/watch.test.js.snap
rename to packages/jest-core/src/__tests__/__snapshots__/watch.test.js.snap
diff --git a/packages/jest-cli/src/__tests__/__snapshots__/watch_filename_pattern_mode.test.js.snap b/packages/jest-core/src/__tests__/__snapshots__/watch_filename_pattern_mode.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/__tests__/__snapshots__/watch_filename_pattern_mode.test.js.snap
rename to packages/jest-core/src/__tests__/__snapshots__/watch_filename_pattern_mode.test.js.snap
diff --git a/packages/jest-cli/src/__tests__/__snapshots__/watch_test_name_pattern_mode.test.js.snap b/packages/jest-core/src/__tests__/__snapshots__/watch_test_name_pattern_mode.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/__tests__/__snapshots__/watch_test_name_pattern_mode.test.js.snap
rename to packages/jest-core/src/__tests__/__snapshots__/watch_test_name_pattern_mode.test.js.snap
diff --git a/packages/jest-cli/src/__tests__/globals.test.js b/packages/jest-core/src/__tests__/globals.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/globals.test.js
rename to packages/jest-core/src/__tests__/globals.test.js
diff --git a/packages/jest-cli/src/__tests__/run_jest.test.js b/packages/jest-core/src/__tests__/run_jest.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/run_jest.test.js
rename to packages/jest-core/src/__tests__/run_jest.test.js
diff --git a/packages/jest-cli/src/__tests__/testSchedulerHelper.test.js b/packages/jest-core/src/__tests__/testSchedulerHelper.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/testSchedulerHelper.test.js
rename to packages/jest-core/src/__tests__/testSchedulerHelper.test.js
diff --git a/packages/jest-cli/src/__tests__/test_root/.hiddenFolder/not-really-a-test.txt b/packages/jest-core/src/__tests__/test_root/.hiddenFolder/not-really-a-test.txt
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/.hiddenFolder/not-really-a-test.txt
rename to packages/jest-core/src/__tests__/test_root/.hiddenFolder/not-really-a-test.txt
diff --git a/packages/jest-cli/src/__tests__/test_root/__testtests__/do-not-match-me.txt b/packages/jest-core/src/__tests__/test_root/__testtests__/do-not-match-me.txt
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/__testtests__/do-not-match-me.txt
rename to packages/jest-core/src/__tests__/test_root/__testtests__/do-not-match-me.txt
diff --git a/packages/jest-cli/src/__tests__/test_root/__testtests__/not-really-a-test.txt b/packages/jest-core/src/__tests__/test_root/__testtests__/not-really-a-test.txt
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/__testtests__/not-really-a-test.txt
rename to packages/jest-core/src/__tests__/test_root/__testtests__/not-really-a-test.txt
diff --git a/packages/jest-cli/src/__tests__/test_root/__testtests__/test.foobar b/packages/jest-core/src/__tests__/test_root/__testtests__/test.foobar
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/__testtests__/test.foobar
rename to packages/jest-core/src/__tests__/test_root/__testtests__/test.foobar
diff --git a/packages/jest-cli/src/__tests__/test_root/__testtests__/test.js b/packages/jest-core/src/__tests__/test_root/__testtests__/test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/__testtests__/test.js
rename to packages/jest-core/src/__tests__/test_root/__testtests__/test.js
diff --git a/packages/jest-cli/src/__tests__/test_root/__testtests__/test.jsx b/packages/jest-core/src/__tests__/test_root/__testtests__/test.jsx
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/__testtests__/test.jsx
rename to packages/jest-core/src/__tests__/test_root/__testtests__/test.jsx
diff --git a/packages/jest-cli/src/__tests__/test_root/module.foobar b/packages/jest-core/src/__tests__/test_root/module.foobar
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/module.foobar
rename to packages/jest-core/src/__tests__/test_root/module.foobar
diff --git a/packages/jest-cli/src/__tests__/test_root/module.jsx b/packages/jest-core/src/__tests__/test_root/module.jsx
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/module.jsx
rename to packages/jest-core/src/__tests__/test_root/module.jsx
diff --git a/packages/jest-cli/src/__tests__/test_root/no_tests.js b/packages/jest-core/src/__tests__/test_root/no_tests.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root/no_tests.js
rename to packages/jest-core/src/__tests__/test_root/no_tests.js
diff --git a/packages/jest-cli/src/__tests__/test_root_with_(parentheses)/__testtests__/test.js b/packages/jest-core/src/__tests__/test_root_with_(parentheses)/__testtests__/test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root_with_(parentheses)/__testtests__/test.js
rename to packages/jest-core/src/__tests__/test_root_with_(parentheses)/__testtests__/test.js
diff --git a/packages/jest-cli/src/__tests__/test_root_with_(parentheses)/module.jsx b/packages/jest-core/src/__tests__/test_root_with_(parentheses)/module.jsx
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_root_with_(parentheses)/module.jsx
rename to packages/jest-core/src/__tests__/test_root_with_(parentheses)/module.jsx
diff --git a/packages/jest-cli/src/__tests__/test_sequencer.test.js b/packages/jest-core/src/__tests__/test_sequencer.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/test_sequencer.test.js
rename to packages/jest-core/src/__tests__/test_sequencer.test.js
diff --git a/packages/jest-cli/src/__tests__/watch.test.js b/packages/jest-core/src/__tests__/watch.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/watch.test.js
rename to packages/jest-core/src/__tests__/watch.test.js
diff --git a/packages/jest-cli/src/__tests__/watch_filename_pattern_mode.test.js b/packages/jest-core/src/__tests__/watch_filename_pattern_mode.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/watch_filename_pattern_mode.test.js
rename to packages/jest-core/src/__tests__/watch_filename_pattern_mode.test.js
diff --git a/packages/jest-cli/src/__tests__/watch_test_name_pattern_mode.test.js b/packages/jest-core/src/__tests__/watch_test_name_pattern_mode.test.js
similarity index 100%
rename from packages/jest-cli/src/__tests__/watch_test_name_pattern_mode.test.js
rename to packages/jest-core/src/__tests__/watch_test_name_pattern_mode.test.js
diff --git a/packages/jest-cli/src/assets/jest_logo.png b/packages/jest-core/src/assets/jest_logo.png
similarity index 100%
rename from packages/jest-cli/src/assets/jest_logo.png
rename to packages/jest-core/src/assets/jest_logo.png
diff --git a/packages/jest-core/src/cli/index.js b/packages/jest-core/src/cli/index.js
new file mode 100644
index 000000000000..b71054c167de
--- /dev/null
+++ b/packages/jest-core/src/cli/index.js
@@ -0,0 +1,211 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+import type {AggregatedResult} from 'types/TestResult';
+import type {Argv} from 'types/Argv';
+import type {GlobalConfig, Path} from 'types/Config';
+
+import {Console, createDirectory, preRunMessage} from 'jest-util';
+import {readConfigs} from 'jest-config';
+import chalk from 'chalk';
+import createContext from '../lib/create_context';
+import exit from 'exit';
+import getChangedFilesPromise from '../getChangedFilesPromise';
+import {formatHandleErrors} from '../collectHandles';
+import handleDeprecationWarnings from '../lib/handle_deprecation_warnings';
+import runJest from '../runJest';
+import Runtime from 'jest-runtime';
+import TestWatcher from '../TestWatcher';
+import watch from '../watch';
+import pluralize from '../pluralize';
+import rimraf from 'rimraf';
+import logDebugMessages from '../lib/log_debug_messages';
+
+const {print: preRunMessagePrint} = preRunMessage;
+
+export const runCLI = async (
+  argv: Argv,
+  projects: Array<Path>,
+): Promise<{results: AggregatedResult, globalConfig: GlobalConfig}> => {
+  const realFs = require('fs');
+  const fs = require('graceful-fs');
+  fs.gracefulify(realFs);
+
+  let results;
+
+  // If we output a JSON object, we can't write anything to stdout, since
+  // it'll break the JSON structure and it won't be valid.
+  const outputStream =
+    argv.json || argv.useStderr ? process.stderr : process.stdout;
+
+  const {globalConfig, configs, hasDeprecationWarnings} = readConfigs(
+    argv,
+    projects,
+  );
+
+  if (argv.debug) {
+    logDebugMessages(globalConfig, configs, outputStream);
+  }
+
+  if (argv.showConfig) {
+    logDebugMessages(globalConfig, configs, process.stdout);
+    exit(0);
+  }
+
+  if (argv.clearCache) {
+    configs.forEach(config => {
+      rimraf.sync(config.cacheDirectory);
+      process.stdout.write(`Cleared ${config.cacheDirectory}\n`);
+    });
+
+    exit(0);
+  }
+
+  await _run(
+    globalConfig,
+    configs,
+    hasDeprecationWarnings,
+    outputStream,
+    (r: AggregatedResult) => (results = r),
+  );
+
+  if (argv.watch || argv.watchAll) {
+    // If in watch mode, return the promise that will never resolve.
+    // If the watch mode is interrupted, watch should handle the process
+    // shutdown.
+    return new Promise(() => {});
+  }
+
+  if (!results) {
+    throw new Error(
+      'AggregatedResult must be present after test run is complete',
+    );
+  }
+
+  const {openHandles} = results;
+
+  if (openHandles && openHandles.length) {
+    const formatted = formatHandleErrors(openHandles, configs[0]);
+
+    const openHandlesString = pluralize('open handle', formatted.length, 's');
+
+    const message =
+      chalk.red(
+        `\nJest has detected the following ${openHandlesString} potentially keeping Jest from exiting:\n\n`,
+      ) + formatted.join('\n\n');
+
+    console.error(message);
+  }
+
+  return {globalConfig, results};
+};
+
+const buildContextsAndHasteMaps = async (
+  configs,
+  globalConfig,
+  outputStream,
+) => {
+  const hasteMapInstances = Array(configs.length);
+  const contexts = await Promise.all(
+    configs.map(async (config, index) => {
+      createDirectory(config.cacheDirectory);
+      const hasteMapInstance = Runtime.createHasteMap(config, {
+        console: new Console(outputStream, outputStream),
+        maxWorkers: globalConfig.maxWorkers,
+        resetCache: !config.cache,
+        watch: globalConfig.watch || globalConfig.watchAll,
+        watchman: globalConfig.watchman,
+      });
+      hasteMapInstances[index] = hasteMapInstance;
+      return createContext(config, await hasteMapInstance.build());
+    }),
+  );
+
+  return {contexts, hasteMapInstances};
+};
+
+const _run = async (
+  globalConfig,
+  configs,
+  hasDeprecationWarnings,
+  outputStream,
+  onComplete,
+) => {
+  // Queries to hg/git can take a while, so we need to start the process
+  // as soon as possible, so by the time we need the result it's already there.
+  const changedFilesPromise = getChangedFilesPromise(globalConfig, configs);
+
+  const {contexts, hasteMapInstances} = await buildContextsAndHasteMaps(
+    configs,
+    globalConfig,
+    outputStream,
+  );
+
+  globalConfig.watch || globalConfig.watchAll
+    ? await runWatch(
+        contexts,
+        configs,
+        hasDeprecationWarnings,
+        globalConfig,
+        outputStream,
+        hasteMapInstances,
+      )
+    : await runWithoutWatch(
+        globalConfig,
+        contexts,
+        outputStream,
+        onComplete,
+        changedFilesPromise,
+      );
+};
+
+const runWatch = async (
+  contexts,
+  configs,
+  hasDeprecationWarnings,
+  globalConfig,
+  outputStream,
+  hasteMapInstances,
+) => {
+  if (hasDeprecationWarnings) {
+    try {
+      await handleDeprecationWarnings(outputStream, process.stdin);
+      return watch(globalConfig, contexts, outputStream, hasteMapInstances);
+    } catch (e) {
+      exit(0);
+    }
+  }
+
+  return watch(globalConfig, contexts, outputStream, hasteMapInstances);
+};
+
+const runWithoutWatch = async (
+  globalConfig,
+  contexts,
+  outputStream,
+  onComplete,
+  changedFilesPromise,
+) => {
+  const startRun = async () => {
+    if (!globalConfig.listTests) {
+      preRunMessagePrint(outputStream);
+    }
+    return runJest({
+      changedFilesPromise,
+      contexts,
+      failedTestsCache: null,
+      globalConfig,
+      onComplete,
+      outputStream,
+      startRun,
+      testWatcher: new TestWatcher({isWatchMode: false}),
+    });
+  };
+  return startRun();
+};
diff --git a/packages/jest-cli/src/collectHandles.js b/packages/jest-core/src/collectHandles.js
similarity index 100%
rename from packages/jest-cli/src/collectHandles.js
rename to packages/jest-core/src/collectHandles.js
diff --git a/packages/jest-cli/src/coverage.template b/packages/jest-core/src/coverage.template
similarity index 100%
rename from packages/jest-cli/src/coverage.template
rename to packages/jest-core/src/coverage.template
diff --git a/packages/jest-cli/src/getChangedFilesPromise.js b/packages/jest-core/src/getChangedFilesPromise.js
similarity index 100%
rename from packages/jest-cli/src/getChangedFilesPromise.js
rename to packages/jest-core/src/getChangedFilesPromise.js
diff --git a/packages/jest-cli/src/getNoTestFound.js b/packages/jest-core/src/getNoTestFound.js
similarity index 100%
rename from packages/jest-cli/src/getNoTestFound.js
rename to packages/jest-core/src/getNoTestFound.js
diff --git a/packages/jest-cli/src/getNoTestFoundFailed.js b/packages/jest-core/src/getNoTestFoundFailed.js
similarity index 100%
rename from packages/jest-cli/src/getNoTestFoundFailed.js
rename to packages/jest-core/src/getNoTestFoundFailed.js
diff --git a/packages/jest-cli/src/getNoTestFoundRelatedToChangedFiles.js b/packages/jest-core/src/getNoTestFoundRelatedToChangedFiles.js
similarity index 100%
rename from packages/jest-cli/src/getNoTestFoundRelatedToChangedFiles.js
rename to packages/jest-core/src/getNoTestFoundRelatedToChangedFiles.js
diff --git a/packages/jest-cli/src/getNoTestFoundVerbose.js b/packages/jest-core/src/getNoTestFoundVerbose.js
similarity index 100%
rename from packages/jest-cli/src/getNoTestFoundVerbose.js
rename to packages/jest-core/src/getNoTestFoundVerbose.js
diff --git a/packages/jest-cli/src/getNoTestsFoundMessage.js b/packages/jest-core/src/getNoTestsFoundMessage.js
similarity index 100%
rename from packages/jest-cli/src/getNoTestsFoundMessage.js
rename to packages/jest-core/src/getNoTestsFoundMessage.js
diff --git a/packages/jest-core/src/jest.js b/packages/jest-core/src/jest.js
new file mode 100644
index 000000000000..ca6fe2d0d479
--- /dev/null
+++ b/packages/jest-core/src/jest.js
@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+export {default as SearchSource} from './SearchSource';
+export {default as TestScheduler} from './TestScheduler';
+export {default as TestWatcher} from './TestWatcher';
+export {runCLI} from './cli';
diff --git a/packages/jest-cli/src/lib/__tests__/__snapshots__/log_debug_messages.test.js.snap b/packages/jest-core/src/lib/__tests__/__snapshots__/log_debug_messages.test.js.snap
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/__snapshots__/log_debug_messages.test.js.snap
rename to packages/jest-core/src/lib/__tests__/__snapshots__/log_debug_messages.test.js.snap
diff --git a/packages/jest-cli/src/lib/__tests__/is_valid_path.test.js b/packages/jest-core/src/lib/__tests__/is_valid_path.test.js
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/is_valid_path.test.js
rename to packages/jest-core/src/lib/__tests__/is_valid_path.test.js
diff --git a/packages/jest-cli/src/lib/__tests__/log_debug_messages.test.js b/packages/jest-core/src/lib/__tests__/log_debug_messages.test.js
similarity index 100%
rename from packages/jest-cli/src/lib/__tests__/log_debug_messages.test.js
rename to packages/jest-core/src/lib/__tests__/log_debug_messages.test.js
diff --git a/packages/jest-cli/src/lib/active_filters_message.js b/packages/jest-core/src/lib/active_filters_message.js
similarity index 100%
rename from packages/jest-cli/src/lib/active_filters_message.js
rename to packages/jest-core/src/lib/active_filters_message.js
diff --git a/packages/jest-cli/src/lib/create_context.js b/packages/jest-core/src/lib/create_context.js
similarity index 100%
rename from packages/jest-cli/src/lib/create_context.js
rename to packages/jest-core/src/lib/create_context.js
diff --git a/packages/jest-cli/src/lib/handle_deprecation_warnings.js b/packages/jest-core/src/lib/handle_deprecation_warnings.js
similarity index 100%
rename from packages/jest-cli/src/lib/handle_deprecation_warnings.js
rename to packages/jest-core/src/lib/handle_deprecation_warnings.js
diff --git a/packages/jest-cli/src/lib/is_valid_path.js b/packages/jest-core/src/lib/is_valid_path.js
similarity index 100%
rename from packages/jest-cli/src/lib/is_valid_path.js
rename to packages/jest-core/src/lib/is_valid_path.js
diff --git a/packages/jest-cli/src/lib/log_debug_messages.js b/packages/jest-core/src/lib/log_debug_messages.js
similarity index 100%
rename from packages/jest-cli/src/lib/log_debug_messages.js
rename to packages/jest-core/src/lib/log_debug_messages.js
diff --git a/packages/jest-cli/src/lib/update_global_config.js b/packages/jest-core/src/lib/update_global_config.js
similarity index 100%
rename from packages/jest-cli/src/lib/update_global_config.js
rename to packages/jest-core/src/lib/update_global_config.js
diff --git a/packages/jest-cli/src/lib/watch_plugins_helpers.js b/packages/jest-core/src/lib/watch_plugins_helpers.js
similarity index 100%
rename from packages/jest-cli/src/lib/watch_plugins_helpers.js
rename to packages/jest-core/src/lib/watch_plugins_helpers.js
diff --git a/packages/jest-cli/src/plugins/quit.js b/packages/jest-core/src/plugins/quit.js
similarity index 100%
rename from packages/jest-cli/src/plugins/quit.js
rename to packages/jest-core/src/plugins/quit.js
diff --git a/packages/jest-cli/src/plugins/test_name_pattern.js b/packages/jest-core/src/plugins/test_name_pattern.js
similarity index 100%
rename from packages/jest-cli/src/plugins/test_name_pattern.js
rename to packages/jest-core/src/plugins/test_name_pattern.js
diff --git a/packages/jest-cli/src/plugins/test_path_pattern.js b/packages/jest-core/src/plugins/test_path_pattern.js
similarity index 100%
rename from packages/jest-cli/src/plugins/test_path_pattern.js
rename to packages/jest-core/src/plugins/test_path_pattern.js
diff --git a/packages/jest-cli/src/plugins/update_snapshots.js b/packages/jest-core/src/plugins/update_snapshots.js
similarity index 100%
rename from packages/jest-cli/src/plugins/update_snapshots.js
rename to packages/jest-core/src/plugins/update_snapshots.js
diff --git a/packages/jest-cli/src/plugins/update_snapshots_interactive.js b/packages/jest-core/src/plugins/update_snapshots_interactive.js
similarity index 100%
rename from packages/jest-cli/src/plugins/update_snapshots_interactive.js
rename to packages/jest-core/src/plugins/update_snapshots_interactive.js
diff --git a/packages/jest-cli/src/pluralize.js b/packages/jest-core/src/pluralize.js
similarity index 100%
rename from packages/jest-cli/src/pluralize.js
rename to packages/jest-core/src/pluralize.js
diff --git a/packages/jest-cli/src/runGlobalHook.js b/packages/jest-core/src/runGlobalHook.js
similarity index 100%
rename from packages/jest-cli/src/runGlobalHook.js
rename to packages/jest-core/src/runGlobalHook.js
diff --git a/packages/jest-cli/src/runJest.js b/packages/jest-core/src/runJest.js
similarity index 100%
rename from packages/jest-cli/src/runJest.js
rename to packages/jest-core/src/runJest.js
diff --git a/packages/jest-cli/src/testResultHelpers.js b/packages/jest-core/src/testResultHelpers.js
similarity index 100%
rename from packages/jest-cli/src/testResultHelpers.js
rename to packages/jest-core/src/testResultHelpers.js
diff --git a/packages/jest-cli/src/testSchedulerHelper.js b/packages/jest-core/src/testSchedulerHelper.js
similarity index 100%
rename from packages/jest-cli/src/testSchedulerHelper.js
rename to packages/jest-core/src/testSchedulerHelper.js
diff --git a/packages/jest-cli/src/types.js b/packages/jest-core/src/types.js
similarity index 100%
rename from packages/jest-cli/src/types.js
rename to packages/jest-core/src/types.js
diff --git a/packages/jest-cli/src/watch.js b/packages/jest-core/src/watch.js
similarity index 100%
rename from packages/jest-cli/src/watch.js
rename to packages/jest-core/src/watch.js
diff --git a/packages/jest-runner/src/__tests__/testRunner.test.js b/packages/jest-runner/src/__tests__/testRunner.test.js
index c4ce341398cd..ca604b10c0ee 100644
--- a/packages/jest-runner/src/__tests__/testRunner.test.js
+++ b/packages/jest-runner/src/__tests__/testRunner.test.js
@@ -6,10 +6,8 @@
  *
  */
 
-'use strict';
-
-const TestRunner = require('../index');
-const {TestWatcher} = require('jest-cli');
+import {TestWatcher} from '@jest/core';
+import TestRunner from '../index';
 
 let mockWorkerFarm;
 
diff --git a/packages/jest/src/jest.js b/packages/jest/src/jest.js
index 318e1641c408..fe580071a094 100644
--- a/packages/jest/src/jest.js
+++ b/packages/jest/src/jest.js
@@ -7,6 +7,6 @@
  * @flow
  */
 
-import cli from 'jest-cli';
+import * as cli from 'jest-cli';
 
 module.exports = cli;
diff --git a/types/TestRunner.js b/types/TestRunner.js
index 2aa7005c6f26..2588e1a29296 100644
--- a/types/TestRunner.js
+++ b/types/TestRunner.js
@@ -8,16 +8,16 @@
  */
 
 import type {Context} from './Context';
-import type {Environment} from 'types/Environment';
+import type {Environment} from './Environment';
 import type {GlobalConfig, Path, ProjectConfig} from './Config';
-import type {ReporterOnStartOptions} from 'types/Reporters';
+import type {ReporterOnStartOptions} from './Reporters';
 import type {
   AggregatedResult,
   SerializableError,
   TestResult,
-} from 'types/TestResult';
+} from './TestResult';
 import type Runtime from 'jest-runtime';
-import type {TestWatcher as _TestWatcher} from 'jest-cli';
+import type {TestWatcher as _TestWatcher} from '@jest/core';
 
 export type Test = {|
   context: Context,
diff --git a/yarn.lock b/yarn.lock
index a78b50b6fcd2..2ca7de58e22a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -838,7 +838,7 @@
     globals "^11.1.0"
     lodash "^4.17.10"
 
-"@babel/types@^7.0.0", "@babel/types@^7.1.2", "@babel/types@^7.2.0", "@babel/types@^7.2.2", "@babel/types@^7.3.0":
+"@babel/types@^7.0.0", "@babel/types@^7.1.2", "@babel/types@^7.2.0", "@babel/types@^7.2.2", "@babel/types@^7.3.0", "@babel/types@^7.3.3":
   version "7.3.3"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.3.3.tgz#6c44d1cdac2a7625b624216657d5bc6c107ab436"
   integrity sha512-2tACZ80Wg09UnPg5uGAOUvvInaqLk3l/IAhQzlxLQOIXacr6bMsra5SH6AWw/hIDRCSbCdHP2KzSOD+cT7TzMQ==
@@ -1823,11 +1823,6 @@
   dependencies:
     "@types/node" "*"
 
-"@types/which@^1.3.1":
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/@types/which/-/which-1.3.1.tgz#7802c380887986ca909008afea4e08025b130f8d"
-  integrity sha512-ZrJDWpvg75LTGX4XwuneY9s6bF3OeZcGTpoGh3zDV9ytzcHMFsRrMIaLBRJZQMBoGyKs6unBQfVdrLZiYfb1zQ==
-
 "@types/write-file-atomic@^2.1.1":
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/@types/write-file-atomic/-/write-file-atomic-2.1.1.tgz#7f9fcd6c5c8d194dba03472e3fa6cb29a839764c"
@@ -13307,7 +13302,7 @@ which-module@^2.0.0:
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
   integrity sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=
 
-which@1, which@^1.2.1, which@^1.2.12, which@^1.2.14, which@^1.2.9, which@^1.3.0, which@^1.3.1:
+which@1, which@^1.2.1, which@^1.2.14, which@^1.2.9, which@^1.3.0, which@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
   integrity sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==