diff --git a/packages/run/CHANGELOG.md b/packages/run/CHANGELOG.md
new file mode 100644
index 000000000..87b1183a0
--- /dev/null
+++ b/packages/run/CHANGELOG.md
@@ -0,0 +1,17 @@
+# @rollup/plugin-run Change Log
+
+## 1.1.0
+
+- Allow arguments and options to be passed to `child_process.fork`
+
+## 1.0.2
+
+- Warn if Rollup version is too low
+
+## 1.0.1
+
+- Handle output files with different names from input files
+
+## 1.0.0
+
+- First release
diff --git a/packages/run/README.md b/packages/run/README.md
new file mode 100644
index 000000000..c43aeafcf
--- /dev/null
+++ b/packages/run/README.md
@@ -0,0 +1,102 @@
+[npm]: https://img.shields.io/npm/v/@rollup/plugin-run
+[npm-url]: https://www.npmjs.com/package/@rollup/plugin-run
+[size]: https://packagephobia.now.sh/badge?p=@rollup/plugin-run
+[size-url]: https://packagephobia.now.sh/result?p=@rollup/plugin-run
+
+[![npm][npm]][npm-url]
+[![size][size]][size-url]
+[![libera manifesto](https://img.shields.io/badge/libera-manifesto-lightgrey.svg)](https://liberamanifesto.com)
+
+# @rollup/plugin-run
+
+🍣 A Rollup plugin which runs your bundles in Node once they're built.
+
+Using this plugin gives much faster results compared to what you would do with [nodemon](https://nodemon.io/).
+
+## Install
+
+Using npm:
+
+```console
+npm install @rollup/plugin-run --save-dev
+```
+
+## Usage
+
+Create a `rollup.config.js` [configuration file](https://www.rollupjs.org/guide/en/#configuration-files) and import the plugin:
+
+```js
+import run from "@rollup/plugin-run";
+
+export default {
+  input: "src/index.js",
+  output: {
+    file: "dist/index.js",
+    format: "cjs"
+  },
+  plugins: [run()]
+};
+```
+
+Then call `rollup` either via the [CLI](https://www.rollupjs.org/guide/en/#command-line-reference) or the [API](https://www.rollupjs.org/guide/en/#javascript-api). If the build produces any errors, the plugin will write a 'alias' character to stderr, which should be audible on most systems.
+
+The plugin `forks` a child process with the generated file, every time the bundle is rebuilt (after first closing the previous process, if it's not the first run).
+
+_Note: This plugin works with Rollup's code-splitting if you're using dynamic `import(...)` — the only constraint is that you have a single entry point specified in the config._
+
+## Options
+
+This plugin supports pass through option available for [child_process.fork(...)](https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options).
+
+Example:
+
+Debugging with sourcemaps using [source-map-support](https://www.npmjs.com/package/source-map-support):
+
+```diff
+// rollup.config.js
+import run from '@rollup/plugin-run';
+
+export default {
+  input: 'src/index.js',
+  output: {
+    file: 'dist/index.js',
+    format: 'cjs',
++    sourcemap: true
+  },
+  plugins: [
+-    run()
++    run({
++      execArgv: ['-r', 'source-map-support/register']
++    })
+  ]
+};
+```
+
+## Practical Example
+
+The feature is usually intended for development use, you may prefer to only include it when Rollup is being run in watch mode:
+
+```diff
+// rollup.config.js
+import run from '@rollup/plugin-run';
+
++const dev = process.env.ROLLUP_WATCH === 'true';
+
+export default {
+  input: 'src/index.js',
+  output: {
+    file: 'dist/index.js',
+    format: 'cjs'
+  },
+  plugins: [
+-    run()
++    dev && run()
+  ]
+};
+```
+
+## Meta
+
+[CONTRIBUTING](/.github/CONTRIBUTING.md)
+
+[LICENSE (MIT)](/LICENSE)
diff --git a/packages/run/lib/index.js b/packages/run/lib/index.js
new file mode 100644
index 000000000..ec2befc60
--- /dev/null
+++ b/packages/run/lib/index.js
@@ -0,0 +1,69 @@
+const path = require('path');
+const childProcess = require('child_process');
+
+module.exports = (opts = {}) => {
+  let input;
+  let proc;
+
+  const args = opts.args || [];
+  const forkOptions = opts.options || opts;
+  delete forkOptions.args;
+
+  return {
+    name: 'run',
+
+    // eslint-disable-next-line no-shadow
+    options(opts) {
+      let inputs = opts.input;
+
+      if (typeof inputs === 'string') {
+        inputs = [inputs];
+      }
+
+      if (typeof inputs === 'object') {
+        inputs = Object.values(inputs);
+      }
+
+      if (inputs.length > 1) {
+        throw new Error(`@rollup/plugin-run only works with a single entry point`);
+      }
+
+      input = path.resolve(inputs[0]);
+    },
+
+    generateBundle(outputOptions, bundle, isWrite) {
+      if (!isWrite) {
+        this.error(`@rollup/plugin-run currently only works with bundles that are written to disk`);
+      }
+
+      const dir = outputOptions.dir || path.dirname(outputOptions.file);
+
+      let dest;
+
+      for (const fileName in bundle) {
+        if (Object.prototype.hasOwnProperty.call(bundle, fileName)) {
+          const chunk = bundle[fileName];
+
+          if (!('isEntry' in chunk)) {
+            this.error(`@rollup/plugin-run requires Rollup 0.65 or higher`);
+          }
+
+          // eslint-disable-next-line no-continue
+          if (!chunk.isEntry) continue;
+
+          if (chunk.modules[input]) {
+            dest = path.join(dir, fileName);
+            break;
+          }
+        }
+      }
+
+      if (dest) {
+        if (proc) proc.kill();
+        proc = childProcess.fork(dest, args, forkOptions);
+      } else {
+        this.error(`@rollup/plugin-run could not find output chunk`);
+      }
+    }
+  };
+};
diff --git a/packages/run/package.json b/packages/run/package.json
new file mode 100644
index 000000000..e1392ccb6
--- /dev/null
+++ b/packages/run/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "@rollup/plugin-run",
+  "version": "1.1.0",
+  "publishConfig": {
+    "access": "public"
+  },
+  "description": "Run your bundle after you've built it",
+  "license": "MIT",
+  "repository": "rollup/plugins",
+  "author": "Rich Harris",
+  "homepage": "https://github.com/rollup/plugins/packages/run/#readme",
+  "bugs": "https://github.com/rollup/plugins/issues",
+  "main": "lib/index.js",
+  "scripts": {
+    "ci:coverage": "nyc pnpm run test && nyc report --reporter=text-lcov > coverage.lcov",
+    "ci:lint": "pnpm run lint && pnpm run security",
+    "ci:lint:commits": "commitlint --from=${CIRCLE_BRANCH} --to=${CIRCLE_SHA1}",
+    "ci:test": "pnpm run test -- --verbose",
+    "lint": "pnpm run lint:js && pnpm run lint:docs && pnpm run lint:package",
+    "lint:docs": "prettier --single-quote --write README.md",
+    "lint:js": "eslint --fix --cache lib test",
+    "lint:package": "prettier --write package.json --plugin=prettier-plugin-package",
+    "prepublishOnly": "pnpm run lint && pnpm run test",
+    "security": "echo 'pnpm needs `npm audit` support'",
+    "test": "ava"
+  },
+  "files": [
+    "lib"
+  ],
+  "keywords": [
+    "rollup",
+    "plugin",
+    "run"
+  ],
+  "peerDependencies": {
+    "rollup": "^1.20.0"
+  },
+  "devDependencies": {
+    "del": "^5.1.0",
+    "rollup": "^1.20.0",
+    "sinon": "^7.5.0"
+  },
+  "ava": {
+    "files": [
+      "!**/fixtures/**"
+    ]
+  }
+}
diff --git a/packages/run/test/fixtures/change-detect-input.js b/packages/run/test/fixtures/change-detect-input.js
new file mode 100644
index 000000000..83a20c5af
--- /dev/null
+++ b/packages/run/test/fixtures/change-detect-input.js
@@ -0,0 +1 @@
+export const Greeting = () => 'Hola';  // eslint-disable-line
\ No newline at end of file
diff --git a/packages/run/test/fixtures/input.js b/packages/run/test/fixtures/input.js
new file mode 100644
index 000000000..0f5dc63f6
--- /dev/null
+++ b/packages/run/test/fixtures/input.js
@@ -0,0 +1 @@
+export const Greeting = () => 'Hello'; // eslint-disable-line
diff --git a/packages/run/test/test.js b/packages/run/test/test.js
new file mode 100644
index 000000000..a20e1441b
--- /dev/null
+++ b/packages/run/test/test.js
@@ -0,0 +1,88 @@
+const fs = require('fs');
+const { EventEmitter } = require('events');
+
+const { join } = require('path');
+
+const childProcess = require('child_process');
+
+const writeFile = require('util').promisify(fs.writeFile);
+
+const del = require('del');
+const { rollup } = require('rollup');
+const test = require('ava');
+const sinon = require('sinon');
+
+const run = require('../lib/');
+
+const cwd = join(__dirname, 'fixtures/');
+const file = join(cwd, 'output/bundle.js');
+const input = join(cwd, 'input.js');
+
+process.chdir(cwd);
+
+const outputOptions = { file, format: 'cjs' };
+
+let mockChildProcess;
+test.before(() => {
+  mockChildProcess = sinon
+    .stub(childProcess, ['fork'])
+    .returns({ ...new EventEmitter(), kill: sinon.fake() });
+});
+
+test('builds the bundle and forks a child process', async (t) => {
+  const bundle = await rollup({
+    input,
+    plugins: [run()]
+  });
+  await bundle.write(outputOptions);
+  t.true(mockChildProcess.calledWithExactly(outputOptions.file, [], {}));
+});
+
+test('allows pass-through options for child_process.fork', async (t) => {
+  const forkOptions = {
+    cwd,
+    detached: false,
+    silent: false
+  };
+  const bundle = await rollup({
+    input,
+    plugins: [run(forkOptions)]
+  });
+
+  await bundle.write(outputOptions);
+  t.true(mockChildProcess.calledWithExactly(outputOptions.file, [], forkOptions));
+});
+
+test('throws an error when bundle is not written to disk', async (t) => {
+  const bundle = await rollup({
+    input,
+    plugins: [run()]
+  });
+  await t.throwsAsync(
+    async () => {
+      await bundle.generate(outputOptions);
+    },
+    {
+      instanceOf: Error,
+      message: '@rollup/plugin-run currently only works with bundles that are written to disk'
+    }
+  );
+});
+
+test('detects changes - forks a new child process and kills older process', async (t) => {
+  // eslint-disable-next-line no-shadow
+  const input = join(cwd, 'change-detect-input.js');
+  const bundle = await rollup({
+    input,
+    plugins: [run()]
+  });
+  await bundle.write(outputOptions);
+  await writeFile(input, "export const Greeting = () => 'Hola';  // eslint-disable-line");
+  await bundle.write(outputOptions);
+  t.true(mockChildProcess.calledWithExactly(outputOptions.file, [], {}));
+  t.is(mockChildProcess().kill.callCount, 1);
+});
+
+test.after(async () => {
+  await del(['output']);
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 5ddaf334f..3d88c1b50 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14,7 +14,7 @@ importers:
       pnpm: 4.3.0
       prettier: 1.19.1
       prettier-plugin-package: 0.3.1_prettier@1.19.1
-      rollup: 1.27.2
+      rollup: 1.27.3
       tslib: 1.10.0
       tslint: 5.20.1_typescript@3.7.2
       typescript: 3.7.2
@@ -165,6 +165,15 @@ importers:
       rollup-pluginutils: ^2.6.0
       source-map: ^0.7.3
       typescript: ^3.4.3
+  packages/run:
+    devDependencies:
+      del: 5.1.0
+      rollup: 1.27.3
+      sinon: 7.5.0
+    specifiers:
+      del: ^5.1.0
+      rollup: ^1.20.0
+      sinon: ^7.5.0
   packages/strip:
     dependencies:
       estree-walker: 0.6.1
@@ -1012,6 +1021,31 @@ packages:
       node: '>=6'
     resolution:
       integrity: sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ==
+  /@sinonjs/commons/1.6.0:
+    dependencies:
+      type-detect: 4.0.8
+    dev: true
+    resolution:
+      integrity: sha512-w4/WHG7C4WWFyE5geCieFJF6MZkbW4VAriol5KlmQXpAQdxvV0p26sqNZOW6Qyw6Y0l9K4g+cHvvczR2sEEpqg==
+  /@sinonjs/formatio/3.2.2:
+    dependencies:
+      '@sinonjs/commons': 1.6.0
+      '@sinonjs/samsam': 3.3.3
+    dev: true
+    resolution:
+      integrity: sha512-B8SEsgd8gArBLMD6zpRw3juQ2FVSsmdd7qlevyDqzS9WTCtvF55/gAL+h6gue8ZvPYcdiPdvueM/qm//9XzyTQ==
+  /@sinonjs/samsam/3.3.3:
+    dependencies:
+      '@sinonjs/commons': 1.6.0
+      array-from: 2.1.1
+      lodash: 4.17.15
+    dev: true
+    resolution:
+      integrity: sha512-bKCMKZvWIjYD0BLGnNrxVuw4dkWCYsLqFOUWw8VgKF/+5Y+mE7LfHWPIYoDXowH+3a9LsWDMo0uAP8YDosPvHQ==
+  /@sinonjs/text-encoding/0.7.1:
+    dev: true
+    resolution:
+      integrity: sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==
   /@szmarczak/http-timer/1.1.2:
     dependencies:
       defer-to-connect: 1.1.0
@@ -1036,7 +1070,7 @@ packages:
     dependencies:
       '@types/events': 3.0.0
       '@types/minimatch': 3.0.3
-      '@types/node': 12.12.8
+      '@types/node': 12.12.11
     dev: true
     resolution:
       integrity: sha512-1Bh06cbWJUHMC97acuD6UMG29nMt0Aqz1vF3guLfG+kHHJhy3AyohZFFxYk2f7Q1SQIrNwvncxAE0N/9s70F2w==
@@ -1244,6 +1278,10 @@ packages:
       node: '>=0.10.0'
     resolution:
       integrity: sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=
+  /array-from/2.1.1:
+    dev: true
+    resolution:
+      integrity: sha1-z+nYwmYoudxa7MYqn12PHzUsEZU=
   /array-includes/3.0.3:
     dependencies:
       define-properties: 1.1.3
@@ -2060,6 +2098,12 @@ packages:
       node: '>=8'
     resolution:
       integrity: sha512-wH9xOVHnczo9jN2IW68BabcecVPxacIA3g/7z6vhSU/4stOKQzeCRK0yD0A24WiAAUJmmVpWqrERcTxnLo3AnA==
+  /diff/3.5.0:
+    dev: true
+    engines:
+      node: '>=0.3.1'
+    resolution:
+      integrity: sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
   /diff/4.0.1:
     dev: true
     engines:
@@ -2181,7 +2225,7 @@ packages:
     dependencies:
       is-callable: 1.1.4
       is-date-object: 1.0.1
-      is-symbol: 1.0.2
+      is-symbol: 1.0.3
     dev: true
     engines:
       node: '>= 0.4'
@@ -3171,14 +3215,14 @@ packages:
       node: '>=8'
     resolution:
       integrity: sha512-XCoy+WlUr7d1+Z8GgSuXmpuUFC9fOhRXglJMx+dwLKTkL44Cjd4W1Z5P+BQZpr+cR93aGP4S/s7Ftw6Nd/kiEw==
-  /is-symbol/1.0.2:
+  /is-symbol/1.0.3:
     dependencies:
       has-symbols: 1.0.1
     dev: true
     engines:
       node: '>= 0.4'
     resolution:
-      integrity: sha512-HS8bZ9ox60yCJLH9snBpIwv9pYUAkcuLhSA1oero1UB5y9aiQpRA8y2ex945AOtCZL1lJDeIk3G5LthswI46Lw==
+      integrity: sha512-OwijhaRSgqvhm/0ZdAcXNZt9lYdKFpcRDT5ULUuYXPoT794UNOdU+gpT6Rzo7b4V2HUl/op6GqY894AZwv9faQ==
   /is-typedarray/1.0.0:
     dev: true
     resolution:
@@ -3195,6 +3239,10 @@ packages:
     dev: true
     resolution:
       integrity: sha512-VjSeb/lHmkoyd8ryPVIKvOCn4D1koMqY+vqyjjUfc3xyKtP4dYOxM44sZrnqQSzSds3xyOrUTLTC9LVCVgLngw==
+  /isarray/0.0.1:
+    dev: true
+    resolution:
+      integrity: sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=
   /isarray/1.0.0:
     dev: true
     resolution:
@@ -3326,6 +3374,10 @@ packages:
     hasBin: true
     resolution:
       integrity: sha512-l+3HXD0GEI3huGq1njuqtzYK8OYJyXMkOLtQ53pjWh89tvWS2h6l+1zMkYWqlb57+SiQodKZyvMEFb2X+KrFhQ==
+  /just-extend/4.0.2:
+    dev: true
+    resolution:
+      integrity: sha512-FrLwOgm+iXrPV+5zDU6Jqu4gCRXbWEQg2O3SKONsWE4w7AXFRkryS53bpWdaL9cNol+AmR3AEYz6kn+o0fCPnw==
   /keyv/3.1.0:
     dependencies:
       json-buffer: 3.0.0
@@ -3544,6 +3596,10 @@ packages:
       node: '>=4'
     resolution:
       integrity: sha1-iDKP19HOeTiykoN0bwsbwSayRwg=
+  /lolex/4.2.0:
+    dev: true
+    resolution:
+      integrity: sha512-gKO5uExCXvSm6zbF562EvM+rd1kQDnB9AZBbiQVzf1ZmdDpxUSvpnAaVOP83N/31mRK8Ml8/VE8DMvsAZQ+7wg==
   /loose-envify/1.4.0:
     dependencies:
       js-tokens: 4.0.0
@@ -3784,6 +3840,16 @@ packages:
     dev: true
     resolution:
       integrity: sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
+  /nise/1.5.2:
+    dependencies:
+      '@sinonjs/formatio': 3.2.2
+      '@sinonjs/text-encoding': 0.7.1
+      just-extend: 4.0.2
+      lolex: 4.2.0
+      path-to-regexp: 1.8.0
+    dev: true
+    resolution:
+      integrity: sha512-/6RhOUlicRCbE9s+94qCUsyE+pKlVJ5AhIv+jEE7ESKwnbXqulKZ1FYU+XAtHHWE9TinYvAxDUJAb912PwPoWA==
   /node-noop/1.0.0:
     dev: false
     resolution:
@@ -4198,6 +4264,12 @@ packages:
     dev: true
     resolution:
       integrity: sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
+  /path-to-regexp/1.8.0:
+    dependencies:
+      isarray: 0.0.1
+    dev: true
+    resolution:
+      integrity: sha512-n43JRhlUKUAlibEJhPeir1ncUID16QnEjNpwzNdO3Lm4ywrBpBZ5oLD0I6br9evr1Y9JTqwRtAh7JLoOzAQdVA==
   /path-type/2.0.0:
     dependencies:
       pify: 2.3.0
@@ -4738,6 +4810,15 @@ packages:
     hasBin: true
     resolution:
       integrity: sha512-sD3iyd0zlvgK1S3MmICi6F/Y+R/QWY5XxzsTGN4pAd+nCasDUizmAhgq2hdh1t2eLux974NHU2TW41fhuGPv+Q==
+  /rollup/1.27.3:
+    dependencies:
+      '@types/estree': 0.0.39
+      '@types/node': 12.12.11
+      acorn: 7.1.0
+    dev: true
+    hasBin: true
+    resolution:
+      integrity: sha512-79AEh4m5NPCz97GTuIoXpSFIMPyk2AiqVQp040baSRPXk/I4YMGt5/CR9GX5oEYEkxwBZoWLheaS1/w/FidfJw==
   /run-async/2.3.0:
     dependencies:
       is-promise: 2.1.0
@@ -4841,6 +4922,18 @@ packages:
     dev: true
     resolution:
       integrity: sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=
+  /sinon/7.5.0:
+    dependencies:
+      '@sinonjs/commons': 1.6.0
+      '@sinonjs/formatio': 3.2.2
+      '@sinonjs/samsam': 3.3.3
+      diff: 3.5.0
+      lolex: 4.2.0
+      nise: 1.5.2
+      supports-color: 5.5.0
+    dev: true
+    resolution:
+      integrity: sha512-AoD0oJWerp0/rY9czP/D6hDTTUYGpObhZjMpd7Cl/A6+j0xBE+ayL/ldfggkBXUs0IkvIiM1ljM8+WkOc5k78Q==
   /slash/3.0.0:
     engines:
       node: '>=8'
@@ -5269,6 +5362,12 @@ packages:
       node: '>= 0.8.0'
     resolution:
       integrity: sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=
+  /type-detect/4.0.8:
+    dev: true
+    engines:
+      node: '>=4'
+    resolution:
+      integrity: sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==
   /type-fest/0.3.1:
     dev: true
     engines: