diff --git a/package-lock.json b/package-lock.json
index 8cf8d0454..1d2cc1659 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,6 +24,15 @@
         "source-map": "0.1.32"
       }
     },
+    "@atom/temp": {
+      "version": "0.8.4",
+      "resolved": "https://registry.npmjs.org/@atom/temp/-/temp-0.8.4.tgz",
+      "integrity": "sha1-RVFIywz2ygNI5xpc+ZiGq8rERek=",
+      "requires": {
+        "os-tmpdir": "^1.0.0",
+        "rimraf": "~2.6.2"
+      }
+    },
     "@atom/watcher": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@atom/watcher/-/watcher-1.0.8.tgz",
@@ -6025,13 +6034,13 @@
       }
     },
     "tree-view": {
-      "version": "https://www.atom.io/api/packages/tree-view/versions/0.222.0/tarball",
-      "integrity": "sha512-H3l7Q6+mUMKdUUxmxDl+23hGC77R6dbJG93jy8cNPMfMvHqdKgtW5THVYSPpsqABvN0HrrufR0dWBS9kUWYZMw==",
+      "version": "https://www.atom.io/api/packages/tree-view/versions/0.224.2/tarball",
+      "integrity": "sha512-zQgrwWo2aBInkSCsldNP9sZJA4OnzznQgKJzQNhClMZJMWEr1Pl1tWnq3x67ie6dINkJ/JWqzbjxz2v2T5U2ig==",
       "requires": {
+        "@atom/temp": "~0.8.4",
         "fs-plus": "3.0.2",
         "minimatch": "0.3.0",
         "pathwatcher": "8.0.1",
-        "temp": "0.8.3",
         "underscore-plus": "1.6.8"
       },
       "dependencies": {
diff --git a/package.json b/package.json
index 022aff911..e038ba272 100644
--- a/package.json
+++ b/package.json
@@ -160,7 +160,7 @@
     "text-buffer": "13.14.6",
     "timecop": "https://www.atom.io/api/packages/timecop/versions/0.36.2/tarball",
     "tree-sitter": "0.13.6",
-    "tree-view": "https://www.atom.io/api/packages/tree-view/versions/0.222.0/tarball",
+    "tree-view": "https://www.atom.io/api/packages/tree-view/versions/0.224.2/tarball",
     "typescript-simple": "1.0.0",
     "underscore-plus": "^1.6.8",
     "update-package-dependencies": "https://www.atom.io/api/packages/update-package-dependencies/versions/0.13.1/tarball",
@@ -225,7 +225,7 @@
     "symbols-view": "0.118.2",
     "tabs": "0.109.2",
     "timecop": "0.36.2",
-    "tree-view": "0.222.0",
+    "tree-view": "0.224.2",
     "update-package-dependencies": "0.13.1",
     "welcome": "0.36.7",
     "whitespace": "0.37.6",
diff --git a/script/bootstrap b/script/bootstrap
index 6e92b1f59..1abfc48d0 100755
--- a/script/bootstrap
+++ b/script/bootstrap
@@ -2,8 +2,9 @@
 
 'use strict'
 
-const childProcess = require('child_process')
+const path = require('path')
 const CONFIG = require('./config')
+const childProcess = require('child_process')
 const cleanDependencies = require('./lib/clean-dependencies')
 const deleteMsbuildFromPath = require('./lib/delete-msbuild-from-path')
 const dependenciesFingerprint = require('./lib/dependencies-fingerprint')
@@ -42,4 +43,28 @@ childProcess.execFileSync(
 )
 runApmInstall(CONFIG.repositoryRootPath, ci)
 
+if (!process.env.CI) {
+  require('colors')
+  const glob = require('glob')
+  const {spawn} = require('child_process')
+
+  // Install the local core packages in-place so they can be used in dev mode
+  const files = glob.sync(path.join(CONFIG.repositoryRootPath, 'packages/*/package.json'))
+  if (files.length > 0) {
+    console.log('Installing core packages for use in dev mode...')
+
+    files.forEach(file => {
+      const packageDir = path.dirname(file)
+      process.stdout.write(`Installing packages/${path.basename(packageDir)} `)
+      runApmInstall(path.dirname(file), false, ['inherit', 'pipe', 'inherit'])
+
+      if (process.platform === 'win32') {
+        return process.stdout.write('done\n'.green)
+      } else {
+        return process.stdout.write('\u2713\n'.green)
+      }
+    })
+  }
+}
+
 dependenciesFingerprint.write()
diff --git a/script/lib/run-apm-install.js b/script/lib/run-apm-install.js
index 2993a3319..982ed7165 100644
--- a/script/lib/run-apm-install.js
+++ b/script/lib/run-apm-install.js
@@ -4,7 +4,7 @@ const childProcess = require('child_process')
 
 const CONFIG = require('../config')
 
-module.exports = function (packagePath, ci) {
+module.exports = function (packagePath, ci, stdioOptions) {
   const installEnv = Object.assign({}, process.env)
   // Set resource path so that apm can load metadata related to Atom.
   installEnv.ATOM_RESOURCE_PATH = CONFIG.repositoryRootPath
@@ -14,6 +14,6 @@ module.exports = function (packagePath, ci) {
   childProcess.execFileSync(
     CONFIG.getApmBinPath(),
     ['--loglevel=error', ci ? 'ci' : 'install'],
-    {env: installEnv, cwd: packagePath, stdio: 'inherit'}
+    {env: installEnv, cwd: packagePath, stdio: stdioOptions || 'inherit'}
   )
 }
diff --git a/spec/package-manager-spec.js b/spec/package-manager-spec.js
index 73f948536..dd87f85fa 100644
--- a/spec/package-manager-spec.js
+++ b/spec/package-manager-spec.js
@@ -30,13 +30,15 @@ describe('PackageManager', () => {
       expect(packageManger.packageDirPaths[0]).toBe(path.join(configDirPath, 'packages'))
     })
 
-    it('adds regular package path and dev package path in dev mode', () => {
+    it('adds regular package path, dev package path, and Atom repo package path in dev mode and dev resource path is set', () => {
       const packageManger = new PackageManager({})
       const configDirPath = path.join('~', 'someConfig')
-      packageManger.initialize({configDirPath, devMode: true})
-      expect(packageManger.packageDirPaths.length).toBe(2)
+      const resourcePath = path.join('~', '/atom')
+      packageManger.initialize({configDirPath, resourcePath, devMode: true})
+      expect(packageManger.packageDirPaths.length).toBe(3)
       expect(packageManger.packageDirPaths).toContain(path.join(configDirPath, 'packages'))
       expect(packageManger.packageDirPaths).toContain(path.join(configDirPath, 'dev', 'packages'))
+      expect(packageManger.packageDirPaths).toContain(path.join(resourcePath, 'packages'))
     })
   })
 
diff --git a/src/main-process/atom-protocol-handler.js b/src/main-process/atom-protocol-handler.js
index 1affba02a..47c3da14f 100644
--- a/src/main-process/atom-protocol-handler.js
+++ b/src/main-process/atom-protocol-handler.js
@@ -20,6 +20,7 @@ class AtomProtocolHandler {
 
     if (!safeMode) {
       this.loadPaths.push(path.join(process.env.ATOM_HOME, 'dev', 'packages'))
+      this.loadPaths.push(path.join(resourcePath, 'packages'))
     }
 
     this.loadPaths.push(path.join(process.env.ATOM_HOME, 'packages'))
diff --git a/src/main-process/auto-update-manager.coffee b/src/main-process/auto-update-manager.coffee
index bc81d425d..74bf2f886 100644
--- a/src/main-process/auto-update-manager.coffee
+++ b/src/main-process/auto-update-manager.coffee
@@ -94,7 +94,7 @@ class AutoUpdateManager
   scheduleUpdateCheck: ->
     # Only schedule update check periodically if running in release version and
     # and there is no existing scheduled update check.
-    unless /\w{7}/.test(@version) or @checkForUpdatesIntervalID
+    unless /-dev/.test(@version) or @checkForUpdatesIntervalID
       checkForUpdates = => @check(hidePopups: true)
       fourHours = 1000 * 60 * 60 * 4
       @checkForUpdatesIntervalID = setInterval(checkForUpdates, fourHours)
diff --git a/src/main-process/get-dev-resource-path.js b/src/main-process/get-dev-resource-path.js
new file mode 100644
index 000000000..fe89e58fb
--- /dev/null
+++ b/src/main-process/get-dev-resource-path.js
@@ -0,0 +1,31 @@
+'use strict'
+
+const path = require('path')
+const fs = require('fs-plus')
+const CSON = require('season')
+const electron = require('electron')
+
+module.exports = function () {
+  const appResourcePath = path.dirname(path.dirname(__dirname))
+  const defaultRepositoryPath = path.join(electron.app.getPath('home'), 'github', 'atom')
+
+  if (process.env.ATOM_DEV_RESOURCE_PATH) {
+    return process.env.ATOM_DEV_RESOURCE_PATH
+  } else if (isAtomRepoPath(process.cwd())) {
+    return process.cwd()
+  } else if (fs.statSyncNoException(defaultRepositoryPath)) {
+    return defaultRepositoryPath
+  }
+
+  return appResourcePath
+}
+
+function isAtomRepoPath (repoPath) {
+  let packageJsonPath = path.join(repoPath, 'package.json')
+  if (fs.statSyncNoException(packageJsonPath)) {
+    let packageJson = CSON.readFileSync(packageJsonPath)
+    return packageJson.name === 'atom'
+  }
+
+  return false
+}
diff --git a/src/main-process/main.js b/src/main-process/main.js
index ee7b96232..77dacd792 100644
--- a/src/main-process/main.js
+++ b/src/main-process/main.js
@@ -4,10 +4,9 @@ if (typeof snapshotResult !== 'undefined') {
 
 const startTime = Date.now()
 
-const electron = require('electron')
-const fs = require('fs')
 const path = require('path')
 const yargs = require('yargs')
+const getDevResourcePath = require('./get-dev-resource-path')
 
 const args =
   yargs(process.argv)
@@ -21,16 +20,8 @@ if (args.resourcePath) {
   resourcePath = args.resourcePath
 } else {
   const stableResourcePath = path.dirname(path.dirname(__dirname))
-  const defaultRepositoryPath = path.join(electron.app.getPath('home'), 'github', 'atom')
-
   if (args.dev || args.test || args.benchmark || args.benchmarkTest) {
-    if (process.env.ATOM_DEV_RESOURCE_PATH) {
-      resourcePath = process.env.ATOM_DEV_RESOURCE_PATH
-    } else if (fs.statSyncNoException(defaultRepositoryPath)) {
-      resourcePath = defaultRepositoryPath
-    } else {
-      resourcePath = stableResourcePath
-    }
+    resourcePath = getDevResourcePath() || stableResourcePath
   } else {
     resourcePath = stableResourcePath
   }
diff --git a/src/main-process/parse-command-line.js b/src/main-process/parse-command-line.js
index f24422ef4..1d25fe70c 100644
--- a/src/main-process/parse-command-line.js
+++ b/src/main-process/parse-command-line.js
@@ -5,6 +5,7 @@ const yargs = require('yargs')
 const {app} = require('electron')
 const path = require('path')
 const fs = require('fs-plus')
+const getDevResourcePath = require('./get-dev-resource-path')
 
 module.exports = function parseCommandLine (processArgs) {
   const options = yargs(processArgs).wrap(yargs.terminalWidth())
@@ -119,7 +120,7 @@ module.exports = function parseCommandLine (processArgs) {
   let pathsToOpen = []
   let urlsToOpen = []
   let devMode = args['dev']
-  let devResourcePath = process.env.ATOM_DEV_RESOURCE_PATH || path.join(app.getPath('home'), 'github', 'atom')
+  let devResourcePath = getDevResourcePath()
   let resourcePath = null
 
   for (const path of args._) {
diff --git a/src/package-manager.js b/src/package-manager.js
index 17a5f2214..0c7943bca 100644
--- a/src/package-manager.js
+++ b/src/package-manager.js
@@ -61,6 +61,7 @@ module.exports = class PackageManager {
     if (params.configDirPath != null && !params.safeMode) {
       if (this.devMode) {
         this.packageDirPaths.push(path.join(params.configDirPath, 'dev', 'packages'))
+        this.packageDirPaths.push(path.join(this.resourcePath, 'packages'))
       }
       this.packageDirPaths.push(path.join(params.configDirPath, 'packages'))
     }