diff --git a/.travis.yml b/.travis.yml
index 9af339e7b..6425f9eb5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -90,6 +90,8 @@ script:
   - drupal yaml:update:value project.yml project.local.hostname '127.0.0.1:8888'
   # BLT added new dependencies for us, so we must update.
   - composer update
+  # Execute all updates with fake "dev" => "dev" version specs. This must be done manually since BLT was not installed prior to this.
+  - blt-console blt:update dev dev $(pwd) --yes
   # Create a .travis.yml, just to make sure it works. It won't be executed.
   - blt ci:travis:init
   - blt ci:pipelines:init
diff --git a/ISSUE_TEMPLATE.md b/ISSUE_TEMPLATE.md
new file mode 100644
index 000000000..e69de29bb
diff --git a/bin/blt-console b/bin/blt-console
index 592e0101e..56ba7e647 100755
--- a/bin/blt-console
+++ b/bin/blt-console
@@ -3,6 +3,7 @@
 
 use Acquia\Blt\Console\Command\ComposerMungeCommand;
 use Acquia\Blt\Console\Command\YamlMungeCommand;
+use Acquia\Blt\Console\Command\UpdateCommand;
 use Symfony\Bridge\Twig\Command\LintCommand;
 use Symfony\Component\Console\Application;
 
@@ -26,4 +27,6 @@ $application = new Application();
 $application->add(new ComposerMungeCommand());
 $application->add(new YamlMungeCommand());
 $application->add(new \Acquia\Blt\Console\Command\TwigLintCommand);
+$application->add(new UpdateCommand());
+
 $application->run();
diff --git a/composer.json b/composer.json
index d0155f5ff..07ef23205 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,9 @@
         "squizlabs/php_codesniffer":        "^2.7",
         "symfony/yaml":                     "^2.8.11",
         "symfony/console":                  "^2.8.11",
-        "symfony/twig-bridge":              "^2.8.11"
+        "symfony/twig-bridge":              "^2.8.11",
+        "doctrine/common":                  "^2.5",
+        "vierbergenlars/php-semver":        "^3.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
index 2a61c9232..fac6972b6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "5a569247ba859639075a439aded0c6bd",
-    "content-hash": "421ea293c853ac6e7c05681341757e84",
+    "hash": "cccdab26f0d5b46cf505a27ae59514a6",
+    "content-hash": "e036a66c5f77742dc664e908fb5ffde0",
     "packages": [
         {
             "name": "alchemy/zippy",
@@ -350,6 +350,76 @@
             ],
             "time": "2015-08-31 12:32:49"
         },
+        {
+            "name": "doctrine/cache",
+            "version": "v1.6.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/cache.git",
+                "reference": "b6f544a20f4807e81f7044d31e679ccbb1866dc3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/cache/zipball/b6f544a20f4807e81f7044d31e679ccbb1866dc3",
+                "reference": "b6f544a20f4807e81f7044d31e679ccbb1866dc3",
+                "shasum": ""
+            },
+            "require": {
+                "php": "~5.5|~7.0"
+            },
+            "conflict": {
+                "doctrine/common": ">2.2,<2.4"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.8|~5.0",
+                "predis/predis": "~1.0",
+                "satooshi/php-coveralls": "~0.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.6.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Common\\Cache\\": "lib/Doctrine/Common/Cache"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Caching library offering an object-oriented API for many cache backends",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "cache",
+                "caching"
+            ],
+            "time": "2016-10-29 11:16:17"
+        },
         {
             "name": "doctrine/collections",
             "version": "v1.3.0",
@@ -416,6 +486,146 @@
             ],
             "time": "2015-04-14 22:21:58"
         },
+        {
+            "name": "doctrine/common",
+            "version": "v2.6.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/common.git",
+                "reference": "a579557bc689580c19fee4e27487a67fe60defc0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/common/zipball/a579557bc689580c19fee4e27487a67fe60defc0",
+                "reference": "a579557bc689580c19fee4e27487a67fe60defc0",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/annotations": "1.*",
+                "doctrine/cache": "1.*",
+                "doctrine/collections": "1.*",
+                "doctrine/inflector": "1.*",
+                "doctrine/lexer": "1.*",
+                "php": "~5.5|~7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.8|~5.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Common\\": "lib/Doctrine/Common"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Common Library for Doctrine projects",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "annotations",
+                "collections",
+                "eventmanager",
+                "persistence",
+                "spl"
+            ],
+            "time": "2015-12-25 13:18:31"
+        },
+        {
+            "name": "doctrine/inflector",
+            "version": "v1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/inflector.git",
+                "reference": "90b2128806bfde671b6952ab8bea493942c1fdae"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/inflector/zipball/90b2128806bfde671b6952ab8bea493942c1fdae",
+                "reference": "90b2128806bfde671b6952ab8bea493942c1fdae",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "4.*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Doctrine\\Common\\Inflector\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Common String Manipulations with regard to casing and singular/plural rules.",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "inflection",
+                "pluralize",
+                "singularize",
+                "string"
+            ],
+            "time": "2015-11-06 14:35:42"
+        },
         {
             "name": "doctrine/instantiator",
             "version": "1.0.5",
@@ -650,16 +860,16 @@
         },
         {
             "name": "gabordemooij/redbean",
-            "version": "v4.3.2",
+            "version": "v4.3.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/gabordemooij/redbean.git",
-                "reference": "72368f15cedfa7990c7fb228e47d2f00c7f49d4f"
+                "reference": "1c7ec69850e9f7966ff7feb87b01d8f43a9753d3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/gabordemooij/redbean/zipball/72368f15cedfa7990c7fb228e47d2f00c7f49d4f",
-                "reference": "72368f15cedfa7990c7fb228e47d2f00c7f49d4f",
+                "url": "https://api.github.com/repos/gabordemooij/redbean/zipball/1c7ec69850e9f7966ff7feb87b01d8f43a9753d3",
+                "reference": "1c7ec69850e9f7966ff7feb87b01d8f43a9753d3",
                 "shasum": ""
             },
             "require": {
@@ -687,7 +897,7 @@
             "keywords": [
                 "orm"
             ],
-            "time": "2016-05-01 10:27:43"
+            "time": "2016-10-03 21:25:17"
         },
         {
             "name": "guzzlehttp/guzzle",
@@ -904,16 +1114,16 @@
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.5.4",
+            "version": "1.5.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "ea74994a3dc7f8d2f65a06009348f2d63c81e61f"
+                "reference": "399c1f9781e222f6eb6cc238796f5200d1b7f108"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/ea74994a3dc7f8d2f65a06009348f2d63c81e61f",
-                "reference": "ea74994a3dc7f8d2f65a06009348f2d63c81e61f",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/399c1f9781e222f6eb6cc238796f5200d1b7f108",
+                "reference": "399c1f9781e222f6eb6cc238796f5200d1b7f108",
                 "shasum": ""
             },
             "require": {
@@ -942,7 +1152,7 @@
                 "object",
                 "object graph"
             ],
-            "time": "2016-09-16 13:37:59"
+            "time": "2016-10-31 17:19:45"
         },
         {
             "name": "padraic/humbug_get_contents",
@@ -1448,16 +1658,16 @@
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "4.0.1",
+            "version": "4.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "5f3f7e736d6319d5f1fc402aff8b026da26709a3"
+                "reference": "6cba06ff75a1a63a71033e1a01b89056f3af1e8d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/5f3f7e736d6319d5f1fc402aff8b026da26709a3",
-                "reference": "5f3f7e736d6319d5f1fc402aff8b026da26709a3",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/6cba06ff75a1a63a71033e1a01b89056f3af1e8d",
+                "reference": "6cba06ff75a1a63a71033e1a01b89056f3af1e8d",
                 "shasum": ""
             },
             "require": {
@@ -1507,7 +1717,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-07-26 14:39:29"
+            "time": "2016-11-01 05:06:24"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -1692,16 +1902,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "5.6.1",
+            "version": "5.6.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "60c32c5b5e79c2248001efa2560f831da11cc2d7"
+                "reference": "a9de0dbafeb6b1391b391fbb034734cb0af9f67c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/60c32c5b5e79c2248001efa2560f831da11cc2d7",
-                "reference": "60c32c5b5e79c2248001efa2560f831da11cc2d7",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/a9de0dbafeb6b1391b391fbb034734cb0af9f67c",
+                "reference": "a9de0dbafeb6b1391b391fbb034734cb0af9f67c",
                 "shasum": ""
             },
             "require": {
@@ -1770,7 +1980,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-10-07 13:03:26"
+            "time": "2016-11-14 06:39:40"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -2305,16 +2515,16 @@
         },
         {
             "name": "sebastian/recursion-context",
-            "version": "1.0.2",
+            "version": "1.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "913401df809e99e4f47b27cdd781f4a258d58791"
+                "reference": "938df7a6478e72795e5f8266cff24d06e3136f2e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/913401df809e99e4f47b27cdd781f4a258d58791",
-                "reference": "913401df809e99e4f47b27cdd781f4a258d58791",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/938df7a6478e72795e5f8266cff24d06e3136f2e",
+                "reference": "938df7a6478e72795e5f8266cff24d06e3136f2e",
                 "shasum": ""
             },
             "require": {
@@ -2354,7 +2564,7 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2015-11-11 19:50:13"
+            "time": "2016-11-15 06:55:36"
         },
         {
             "name": "sebastian/resource-operations",
@@ -2566,7 +2776,7 @@
         },
         {
             "name": "symfony/config",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/config.git",
@@ -2619,16 +2829,16 @@
         },
         {
             "name": "symfony/console",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "d7a5a88178f94dcc29531ea4028ea614e35452d4"
+                "reference": "7350016c8abcab897046f1aead2b766b84d3eff8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/d7a5a88178f94dcc29531ea4028ea614e35452d4",
-                "reference": "d7a5a88178f94dcc29531ea4028ea614e35452d4",
+                "url": "https://api.github.com/repos/symfony/console/zipball/7350016c8abcab897046f1aead2b766b84d3eff8",
+                "reference": "7350016c8abcab897046f1aead2b766b84d3eff8",
                 "shasum": ""
             },
             "require": {
@@ -2676,11 +2886,11 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-28 00:10:16"
+            "time": "2016-10-06 01:43:09"
         },
         {
             "name": "symfony/css-selector",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/css-selector.git",
@@ -2733,7 +2943,7 @@
         },
         {
             "name": "symfony/debug",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
@@ -2790,16 +3000,16 @@
         },
         {
             "name": "symfony/dependency-injection",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/dependency-injection.git",
-                "reference": "ee9ec9ac2b046462d341e9de7c4346142d335e75"
+                "reference": "3d61c765daa1a5832f1d7c767f48886b8d8ea64c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/dependency-injection/zipball/ee9ec9ac2b046462d341e9de7c4346142d335e75",
-                "reference": "ee9ec9ac2b046462d341e9de7c4346142d335e75",
+                "url": "https://api.github.com/repos/symfony/dependency-injection/zipball/3d61c765daa1a5832f1d7c767f48886b8d8ea64c",
+                "reference": "3d61c765daa1a5832f1d7c767f48886b8d8ea64c",
                 "shasum": ""
             },
             "require": {
@@ -2849,20 +3059,20 @@
             ],
             "description": "Symfony DependencyInjection Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-24 09:47:20"
+            "time": "2016-10-24 15:52:36"
         },
         {
             "name": "symfony/dom-crawler",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/dom-crawler.git",
-                "reference": "aac03b7ea2a7adff10a3599d614e79e6101230ab"
+                "reference": "a94f3fe6f179d6453e5ed8188cf4bfdf933d85f4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/aac03b7ea2a7adff10a3599d614e79e6101230ab",
-                "reference": "aac03b7ea2a7adff10a3599d614e79e6101230ab",
+                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/a94f3fe6f179d6453e5ed8188cf4bfdf933d85f4",
+                "reference": "a94f3fe6f179d6453e5ed8188cf4bfdf933d85f4",
                 "shasum": ""
             },
             "require": {
@@ -2905,20 +3115,20 @@
             ],
             "description": "Symfony DomCrawler Component",
             "homepage": "https://symfony.com",
-            "time": "2016-07-30 07:20:35"
+            "time": "2016-10-18 15:35:45"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "889983a79a043dfda68f38c38b6dba092dd49cd8"
+                "reference": "25c576abd4e0f212e678fe8b2bd9a9a98c7ea934"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/889983a79a043dfda68f38c38b6dba092dd49cd8",
-                "reference": "889983a79a043dfda68f38c38b6dba092dd49cd8",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/25c576abd4e0f212e678fe8b2bd9a9a98c7ea934",
+                "reference": "25c576abd4e0f212e678fe8b2bd9a9a98c7ea934",
                 "shasum": ""
             },
             "require": {
@@ -2965,20 +3175,20 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2016-07-28 16:56:28"
+            "time": "2016-10-13 01:43:15"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "44b499521defddf2eae17a18c811bbdae4f98bdf"
+                "reference": "a3784111af9f95f102b6411548376e1ae7c93898"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/44b499521defddf2eae17a18c811bbdae4f98bdf",
-                "reference": "44b499521defddf2eae17a18c811bbdae4f98bdf",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/a3784111af9f95f102b6411548376e1ae7c93898",
+                "reference": "a3784111af9f95f102b6411548376e1ae7c93898",
                 "shasum": ""
             },
             "require": {
@@ -3014,11 +3224,11 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-06 10:55:00"
+            "time": "2016-10-18 04:28:30"
         },
         {
             "name": "symfony/finder",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
@@ -3067,16 +3277,16 @@
         },
         {
             "name": "symfony/http-foundation",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/http-foundation.git",
-                "reference": "91f87d27e9fe99435278c337375b0dce292fe0e2"
+                "reference": "a6e6c34d337f3c74c39b29c5f54d33023de8897c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/91f87d27e9fe99435278c337375b0dce292fe0e2",
-                "reference": "91f87d27e9fe99435278c337375b0dce292fe0e2",
+                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/a6e6c34d337f3c74c39b29c5f54d33023de8897c",
+                "reference": "a6e6c34d337f3c74c39b29c5f54d33023de8897c",
                 "shasum": ""
             },
             "require": {
@@ -3118,20 +3328,20 @@
             ],
             "description": "Symfony HttpFoundation Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-21 19:04:07"
+            "time": "2016-10-24 15:52:36"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.2.0",
+            "version": "v1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "dff51f72b0706335131b00a7f49606168c582594"
+                "reference": "e79d363049d1c2128f133a2667e4f4190904f7f4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/dff51f72b0706335131b00a7f49606168c582594",
-                "reference": "dff51f72b0706335131b00a7f49606168c582594",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/e79d363049d1c2128f133a2667e4f4190904f7f4",
+                "reference": "e79d363049d1c2128f133a2667e4f4190904f7f4",
                 "shasum": ""
             },
             "require": {
@@ -3143,7 +3353,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.3-dev"
                 }
             },
             "autoload": {
@@ -3177,20 +3387,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-05-18 14:26:46"
+            "time": "2016-11-14 01:06:16"
         },
         {
             "name": "symfony/polyfill-php54",
-            "version": "v1.2.0",
+            "version": "v1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php54.git",
-                "reference": "34d761992f6f2cc6092cc0e5e93f38b53ba5e4f1"
+                "reference": "90e085822963fdcc9d1c5b73deb3d2e5783b16a0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php54/zipball/34d761992f6f2cc6092cc0e5e93f38b53ba5e4f1",
-                "reference": "34d761992f6f2cc6092cc0e5e93f38b53ba5e4f1",
+                "url": "https://api.github.com/repos/symfony/polyfill-php54/zipball/90e085822963fdcc9d1c5b73deb3d2e5783b16a0",
+                "reference": "90e085822963fdcc9d1c5b73deb3d2e5783b16a0",
                 "shasum": ""
             },
             "require": {
@@ -3199,7 +3409,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.3-dev"
                 }
             },
             "autoload": {
@@ -3235,20 +3445,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-05-18 14:26:46"
+            "time": "2016-11-14 01:06:16"
         },
         {
             "name": "symfony/polyfill-php55",
-            "version": "v1.2.0",
+            "version": "v1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php55.git",
-                "reference": "bf2ff9ad6be1a4772cb873e4eea94d70daa95c6d"
+                "reference": "03e3f0350bca2220e3623a0e340eef194405fc67"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php55/zipball/bf2ff9ad6be1a4772cb873e4eea94d70daa95c6d",
-                "reference": "bf2ff9ad6be1a4772cb873e4eea94d70daa95c6d",
+                "url": "https://api.github.com/repos/symfony/polyfill-php55/zipball/03e3f0350bca2220e3623a0e340eef194405fc67",
+                "reference": "03e3f0350bca2220e3623a0e340eef194405fc67",
                 "shasum": ""
             },
             "require": {
@@ -3258,7 +3468,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.3-dev"
                 }
             },
             "autoload": {
@@ -3291,11 +3501,11 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-05-18 14:26:46"
+            "time": "2016-11-14 01:06:16"
         },
         {
             "name": "symfony/process",
-            "version": "v3.1.5",
+            "version": "v3.1.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
@@ -3344,16 +3554,16 @@
         },
         {
             "name": "symfony/translation",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation.git",
-                "reference": "bf0ff95faa9b6c0708efc1986255e3608d0ed3c7"
+                "reference": "cca6ff892355876534b01a927f789bac9601c935"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/translation/zipball/bf0ff95faa9b6c0708efc1986255e3608d0ed3c7",
-                "reference": "bf0ff95faa9b6c0708efc1986255e3608d0ed3c7",
+                "url": "https://api.github.com/repos/symfony/translation/zipball/cca6ff892355876534b01a927f789bac9601c935",
+                "reference": "cca6ff892355876534b01a927f789bac9601c935",
                 "shasum": ""
             },
             "require": {
@@ -3404,25 +3614,25 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-06 10:55:00"
+            "time": "2016-10-18 04:28:30"
         },
         {
             "name": "symfony/twig-bridge",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/twig-bridge.git",
-                "reference": "5586685d161c411ab33a9ea72d3b25a337337942"
+                "reference": "b9df700554a19c9c00c662f2cd9fb3f03c0d4bcf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/twig-bridge/zipball/5586685d161c411ab33a9ea72d3b25a337337942",
-                "reference": "5586685d161c411ab33a9ea72d3b25a337337942",
+                "url": "https://api.github.com/repos/symfony/twig-bridge/zipball/b9df700554a19c9c00c662f2cd9fb3f03c0d4bcf",
+                "reference": "b9df700554a19c9c00c662f2cd9fb3f03c0d4bcf",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.9",
-                "twig/twig": "~1.26|~2.0"
+                "twig/twig": "~1.27|~2.0"
             },
             "require-dev": {
                 "symfony/asset": "~2.7|~3.0.0",
@@ -3485,20 +3695,20 @@
             ],
             "description": "Symfony Twig Bridge",
             "homepage": "https://symfony.com",
-            "time": "2016-10-03 15:49:46"
+            "time": "2016-10-24 15:52:36"
         },
         {
             "name": "symfony/yaml",
-            "version": "v2.8.12",
+            "version": "v2.8.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "e7540734bad981fe59f8ef14b6fc194ae9df8d9c"
+                "reference": "396784cd06b91f3db576f248f2402d547a077787"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/e7540734bad981fe59f8ef14b6fc194ae9df8d9c",
-                "reference": "e7540734bad981fe59f8ef14b6fc194ae9df8d9c",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/396784cd06b91f3db576f248f2402d547a077787",
+                "reference": "396784cd06b91f3db576f248f2402d547a077787",
                 "shasum": ""
             },
             "require": {
@@ -3534,20 +3744,20 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-02 01:57:56"
+            "time": "2016-10-21 20:59:10"
         },
         {
             "name": "twig/twig",
-            "version": "v1.26.1",
+            "version": "v1.27.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/twigphp/Twig.git",
-                "reference": "a09d8ee17ac1cfea29ed60c83960ad685c6a898d"
+                "reference": "3c6c0033fd3b5679c6e1cb60f4f9766c2b424d97"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/a09d8ee17ac1cfea29ed60c83960ad685c6a898d",
-                "reference": "a09d8ee17ac1cfea29ed60c83960ad685c6a898d",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/3c6c0033fd3b5679c6e1cb60f4f9766c2b424d97",
+                "reference": "3c6c0033fd3b5679c6e1cb60f4f9766c2b424d97",
                 "shasum": ""
             },
             "require": {
@@ -3560,7 +3770,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.26-dev"
+                    "dev-master": "1.27-dev"
                 }
             },
             "autoload": {
@@ -3595,7 +3805,59 @@
             "keywords": [
                 "templating"
             ],
-            "time": "2016-10-05 18:57:41"
+            "time": "2016-10-25 19:17:17"
+        },
+        {
+            "name": "vierbergenlars/php-semver",
+            "version": "3.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/vierbergenlars/php-semver.git",
+                "reference": "516bb3061577e60e9420cbecc479362d3ad8c7f1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/vierbergenlars/php-semver/zipball/516bb3061577e60e9420cbecc479362d3ad8c7f1",
+                "reference": "516bb3061577e60e9420cbecc479362d3ad8c7f1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "simpletest/simpletest": "1.1.*"
+            },
+            "bin": [
+                "bin/semver",
+                "bin/update-versions"
+            ],
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "vierbergenlars\\SemVer\\": "src/",
+                    "vierbergenlars\\LibJs\\": "src/"
+                },
+                "classmap": [
+                    "src/vierbergenlars/SemVer/internal.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Lars Vierbergen",
+                    "email": "vierbergenlars@gmail.com"
+                }
+            ],
+            "description": "The Semantic Versioner for PHP",
+            "keywords": [
+                "semantic",
+                "semver",
+                "versioning"
+            ],
+            "time": "2015-05-02 19:28:54"
         },
         {
             "name": "webmozart/assert",
diff --git a/phing/tasks/blt.xml b/phing/tasks/blt.xml
index 1f1b770dc..5b4fbfdfc 100644
--- a/phing/tasks/blt.xml
+++ b/phing/tasks/blt.xml
@@ -48,6 +48,12 @@
     <echo>To remove deprecated BLT files, run "blt cleanup".</echo>
   </target>
 
+  <target name="blt:update-delta" description="Performs scripted updates for a specific BLT version delta." hidden="true">
+    <fail unless="blt.prior_version"/>
+    <fail unless="blt.version"/>
+    <exec dir="${repo.root}" command="${repo.root}/vendor/bin/blt-console blt:update ${blt.prior_version} ${blt.version} ${blt.root}" logoutput="true" checkreturn="true" level="${blt.exec_level}" passthru="true"/>
+  </target>
+
   <target name="blt:update-composer" description="Updates project composer.json with a subset of new key value pairs from upstream. This WILL overwrite existing values." hidden="true">
     <!--@todo Output different message if composer.json does not exist.-->
     <echo>Merging BLT's composer.json template with your project's composer.json.</echo>
diff --git a/src/Annotations/Update.php b/src/Annotations/Update.php
new file mode 100644
index 000000000..e610856fc
--- /dev/null
+++ b/src/Annotations/Update.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Acquia\Blt\Annotations;
+
+/**
+ * @Annotation
+ * @Target({"METHOD","PROPERTY"})
+ */
+class Update
+{
+  /** @Required */
+  public $version;
+  
+  /**
+   * @var string
+   * @Required
+   */
+  public $description;
+}
diff --git a/src/Composer/Plugin.php b/src/Composer/Plugin.php
index 1b95ac9ed..d6175be82 100644
--- a/src/Composer/Plugin.php
+++ b/src/Composer/Plugin.php
@@ -7,6 +7,7 @@
 
 namespace Acquia\Blt\Composer;
 
+use Acquia\Blt\Update\Updater;
 use Composer\Composer;
 use Composer\DependencyResolver\Operation\InstallOperation;
 use Composer\DependencyResolver\Operation\UninstallOperation;
@@ -22,7 +23,7 @@
 use Composer\Script\ScriptEvents;
 use Composer\Script\PackageEvent;
 use Composer\Util\ProcessExecutor;
-use Composer\Util\RemoteFilesystem;
+use Composer\Util\Filesystem;
 use Symfony\Component\Process\Process;
 
 class Plugin implements PluginInterface, EventSubscriberInterface {
@@ -49,6 +50,9 @@ class Plugin implements PluginInterface, EventSubscriberInterface {
    */
   protected $bltPackage;
 
+  /** @var string */
+  protected $blt_prior_version;
+
   /**
    * Apply plugin modifications to composer
    *
@@ -67,12 +71,27 @@ public function activate(Composer $composer, IOInterface $io) {
    */
   public static function getSubscribedEvents() {
     return array(
+      PackageEvents::PRE_PACKAGE_INSTALL => "onPrePackageEvent",
+      PackageEvents::PRE_PACKAGE_UPDATE => "onPrePackageEvent",
       PackageEvents::POST_PACKAGE_INSTALL => "onPostPackageEvent",
       PackageEvents::POST_PACKAGE_UPDATE => "onPostPackageEvent",
       ScriptEvents::POST_UPDATE_CMD => 'onPostCmdEvent'
     );
   }
 
+  /**
+   * Marks initial blt version before install or update command.
+   *
+   * @param \Composer\Installer\PackageEvent $event
+   */
+  public function onPrePackageEvent(\Composer\Installer\PackageEvent $event){
+    $package = $this->getBltPackage($event->getOperation());
+    if ($package) {
+      $this->blt_prior_version = $package->getVersion();
+      // We write this to disk because the blt_prior_version property does not persist.
+      file_put_contents($this->getVendorPath() . '/blt_prior_version.txt', $this->blt_prior_version);
+    }
+  }
   /**
    * Marks blt to be processed after an install or update command.
    *
@@ -88,18 +107,20 @@ public function onPostPackageEvent(\Composer\Installer\PackageEvent $event){
   }
 
   /**
-   * Post install command event to execute the blt update.
+   * Execute blt update after update command has been executed, if applicable.
    *
    * @param \Composer\Script\Event $event
    */
   public function onPostCmdEvent(\Composer\Script\Event $event) {
     // Only install the template files if acquia/blt was installed.
     if (isset($this->bltPackage)) {
-      $this->executeBltUpdate();
+      $version = $this->bltPackage->getVersion();
+      $this->executeBltUpdate($version);
     }
   }
 
   /**
+   * Gets the acquia/blt package, if it is the package that is being operated on.
    * @param $operation
    * @return mixed
    */
@@ -116,18 +137,54 @@ protected function getBltPackage($operation) {
     return NULL;
   }
 
-  protected function executeBltUpdate() {
+  /**
+   * Executes `blt update` and `blt-console blt:update` commands.
+   * @param $version
+   */
+  protected function executeBltUpdate($version) {
     $options = $this->getOptions();
     if ($options['blt']['update']) {
-      $this->io->write('<info>Updating BLT templated files</info>');
+      $this->io->write('<info>Updating BLT templated files...</info>');
+
+      // Rsyncs, updates composer.json, project.yml.
       $this->executeCommand('blt update');
+
+      if (file_exists($this->getVendorPath() . '/blt_prior_version.txt')) {
+        $this->blt_prior_version = file_get_contents($this->getVendorPath() . '/blt_prior_version.txt');
+        unlink($this->getVendorPath() . '/blt_prior_version.txt');
+      }
+
+      // Execute update hooks for this specific version delta.
+      if (isset($this->blt_prior_version)) {
+        $this->io->write("<info>Executing scripted updates for BLT version delta {$this->blt_prior_version} -> $version ...</info>");
+        // $this->executeCommand("blt blt:update-delta -Dblt.prior_version={$this->blt_prior_version} -Dblt.version=$version");
+        // @todo Allow prompt here.
+        $this->executeCommand("blt-console blt:update {$this->blt_prior_version} $version {$this->getRepoRoot()} --yes");
+      }
+      else {
+        $this->io->write("<comment>Could not detect prior BLT version. Skipping scripted updates.</comment>");
+      }
+
       $this->io->write('<comment>This may have modified your composer.json and require a subsequent `composer update`</comment>');
+
+      // @todo check if require or require-dev changed. If so, run `composer update`.
+      // @todo if require and require-dev did not change, but something else in composer.json changed, execute `composer update --lock`.
     }
     else {
       $this->io->write('<comment>Skipping update of BLT templated files</comment>');
     }
   }
 
+  /**
+   * Returns the repo root's filepath, assumed to be one dir above vendor dir.
+   *
+   * @return string
+   *   The file path of the repository root.
+   */
+  public function getRepoRoot() {
+    return dirname($this->getVendorPath());
+  }
+
   /**
    * Get the path to the 'vendor' directory.
    *
@@ -138,6 +195,7 @@ public function getVendorPath() {
     $filesystem = new Filesystem();
     $filesystem->ensureDirectoryExists($config->get('vendor-dir'));
     $vendorPath = $filesystem->normalizePath(realpath($config->get('vendor-dir')));
+
     return $vendorPath;
   }
 
diff --git a/src/Console/Command/UpdateCommand.php b/src/Console/Command/UpdateCommand.php
new file mode 100644
index 000000000..1c8036b47
--- /dev/null
+++ b/src/Console/Command/UpdateCommand.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Acquia\Blt\Console\Command;
+
+use Acquia\Blt\Update\Updater;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\ConfirmationQuestion;
+use Symfony\Component\Yaml\Yaml;
+use Symfony\Component\Yaml\Exception\ParseException;
+
+class UpdateCommand extends Command
+{
+  protected function configure()
+  {
+    $this
+      ->setName('blt:update')
+      ->setDescription('Performs BLT updates for specific version delta.')
+      ->addArgument(
+        'starting_version',
+        InputArgument::REQUIRED,
+        'The starting version'
+      )
+      ->addArgument(
+        'ending_version',
+        InputArgument::REQUIRED,
+        'The ending version.'
+      )
+      ->addArgument(
+        'repo_root',
+        InputArgument::REQUIRED,
+        'The root directory of the repository that utilizes BLT.'
+      )
+      ->addOption(
+        'yes',
+        'y',
+        InputOption::VALUE_NONE,
+        'Answers yes to all question prompts'
+      )
+    ;
+  }
+
+  protected function execute(InputInterface $input, OutputInterface $output)
+  {
+    $starting_version = $input->getArgument('starting_version');
+    $ending_version = $input->getArgument('ending_version');
+    $repo_root = $input->getArgument('repo_root');
+
+    $updater = new Updater();
+    $updater->setRepoRoot($repo_root);
+    $updates = $updater->getUpdates($starting_version, $ending_version);
+    if ($updates) {
+      $output->writeln("<comment>The following BLT updates are outstanding:</comment>");
+      $updater->printUpdates($updates);
+
+      if (!$input->getOption('yes')) {
+        $question = new ConfirmationQuestion(
+          '<question>Would you like to perform the listed updates?</question> ',
+          false
+        );
+
+        $continue = $this->getHelper('question')->ask($input, $output, $question);
+        if (!$continue) {
+          return 1;
+        }
+      }
+
+      $updater->executeUpdates($updates);
+    }
+    else {
+      $output->writeln("<comment>There are no scripted updates avaiable between BLT versions $starting_version and $ending_version.</comment>");
+    }
+  }
+}
diff --git a/src/Update/Updater.php b/src/Update/Updater.php
new file mode 100644
index 000000000..3e37fc6e8
--- /dev/null
+++ b/src/Update/Updater.php
@@ -0,0 +1,227 @@
+<?php
+
+namespace Acquia\Blt\Update;
+
+use Acquia\Blt\Annotations\Update;
+use Doctrine\Common\Annotations\AnnotationReader;
+use Doctrine\Common\Annotations\AnnotationRegistry;
+use Doctrine\Common\Annotations\IndexedReader;
+use Symfony\Component\Console\Formatter\OutputFormatter;
+use Symfony\Component\Console\Output\ConsoleOutput;
+use Symfony\Component\Filesystem\Exception\FileNotFoundException;
+use Symfony\Component\Filesystem\Filesystem;
+use Symfony\Component\Process\Process;
+use vierbergenlars\SemVer\version;
+
+class Updater {
+
+  /** @var \Symfony\Component\Console\Output\ConsoleOutput */
+  protected $output;
+
+  /** @var string */
+  protected $repoRoot;
+
+  /** @var \Symfony\Component\Filesystem\Filesystem  */
+  protected $fs;
+
+  /**
+   * Returns $this->repoRoot.
+   *
+   * @return string
+   *   The filepath of the repository root directory.
+   */
+  public function getRepoRoot() {
+    return $this->repoRoot;
+  }
+
+  /**
+   * The filepath of the repository root directory.
+   *
+   * This directory is expected to contain the composer.json that defines
+   * acquia/blt as a dependency.
+   *
+   * @param string $repoRoot
+   *   The filepath of the repository root directory.
+   */
+  public function setRepoRoot($repoRoot) {
+    if (!$this->fs->exists($repoRoot)) {
+      throw new FileNotFoundException();
+    }
+
+    $this->repoRoot = $repoRoot;
+  }
+
+  /**
+   * Updater constructor.
+   *
+   * @param string $update_class
+   *   The name of the class containing the update methods to be executed.
+   */
+  public function __construct($update_class = 'Acquia\Blt\Update\Updates')
+  {
+    $this->output = new ConsoleOutput();
+    $this->output->setFormatter(new OutputFormatter(true));
+    AnnotationRegistry::registerFile(__DIR__ . '/../Annotations/Update.php');
+    $this->annotationsReader = new IndexedReader(new AnnotationReader());
+    $this->updateClassName = $update_class;
+    $this->fs = new Filesystem();
+  }
+
+  /**
+   * Executes an array of updates.
+   *
+   * @param $updates \Acquia\Blt\Annotations\Update[]
+   */
+  public function executeUpdates($updates) {
+    /** @var Updates $updates_object */
+    $updates_object = new $this->updateClassName();
+    $updates_object->setUpdater($this);
+    /**
+     * @var string $method_name
+     * @var Update $update
+     */
+    foreach ($updates as $method_name => $update) {
+      $this->output->writeln("Executing Updater->$method_name: {$update->description}");
+      call_user_func([$updates_object, $method_name]);
+    }
+  }
+
+  /**
+   * Prints a human-readable list of update methods to the screen.
+   *
+   * @param $updates \Acquia\Blt\Annotations\Update[]
+   */
+  public function printUpdates($updates) {
+    /**
+     * @var string $method_name
+     * @var Update $update
+     */
+    foreach ($updates as $method_name => $update) {
+      $this->output->writeln("{$update->version}: {$update->description}");
+    }
+  }
+
+  /**
+   * Gets all applicable updates for a given version delta.
+   *
+   * @param string $starting_version
+   *   The starting version. E.g., 8.5.0.
+   *
+   * @param string $ending_version
+   *   The ending version. E.g., 8.5.1.
+   *
+   * @return array
+   *   An array of applicable update methods, keyed by method name. Each row
+   *   contains the metadata from the Update annotation.
+   */
+  public function getUpdates($starting_version, $ending_version) {
+    $updates = [];
+    $update_methods = $this->getAllUpdateMethods();
+    $include_all_updates = FALSE;
+
+    if (strpos($starting_version, 'dev') !== FALSE
+      || strpos($ending_version, 'dev') !== FALSE ) {
+      $this->output->writeln("<comment>You are (or were) using a development branch of BLT. Assuming that you require all scripted updates.</comment>");
+      $include_all_updates = TRUE;
+    }
+
+    /**
+     * @var string $method_name
+     * @var Update $metadata
+     */
+    foreach ($update_methods as $method_name => $metadata) {
+      $version = $metadata->version;
+
+      if ($include_all_updates
+        || (version::gt($version, $starting_version) && version::lte($version, $ending_version))) {
+        $updates[$method_name] = $metadata;
+      }
+    }
+
+    return $updates;
+  }
+
+  /**
+   * Gather an array of all available update methods.
+   *
+   * This will only return methods using the Update annotation.
+   *
+   * @see drupal_get_schema_versions()
+   */
+  protected function getAllUpdateMethods() {
+    $update_methods = [];
+    $methods = get_class_methods($this->updateClassName);
+    foreach ($methods as $method_name) {
+      $reflectionMethod = new \ReflectionMethod($this->updateClassName, $method_name);
+      $annotations = $this->annotationsReader->getMethodAnnotation($reflectionMethod, 'Acquia\Blt\Annotations\Update');
+      if ($annotations) {
+        $update_methods[$method_name] = $annotations;
+      }
+    }
+
+    return $update_methods;
+  }
+
+  /**
+   * @param string $command
+   * @param string $cwd
+   * @param bool $display_output
+   *   Optional. Whether to print command output to screen. Changes return
+   *   value.
+   * @param bool $mustRun
+   *
+   * @return bool|string
+   *   If $display_output is true, method will return TRUE for success, FALSE
+   *   for failure. If $display_output false, method will return command output.
+   */
+  public static function executeCommand($command, $cwd = null, $display_output = true, $mustRun = true)
+  {
+    $timeout = 10800;
+    $env = [
+        'COMPOSER_PROCESS_TIMEOUT' => $timeout
+      ] + $_ENV;
+    $process = new Process($command, $cwd, $env, null, $timeout);
+    $method = $mustRun ? 'mustRun' : 'run';
+    if ($display_output) {
+      $process->$method(function ($type, $buffer) {
+        print $buffer;
+      });
+      return $process->isSuccessful();
+    } else {
+      $process->$method();
+      return $process->getOutput();
+    }
+  }
+
+  /**
+   * Removes a patch from repo's root composer.json file.
+   *
+   * @param string $package
+   *   The composer package name. E.g., 'drupal/features'.
+   *
+   * @param string $url
+   *   The URL of the patch.
+   *
+   * @return bool
+   *   TRUE if patch was removed, otherwise FALSE.
+   */
+  public function removePatch($package, $url) {
+    $composer_json_filepath = $this->repoRoot . '/composer.json';
+    $composer_json = json_decode(file_get_contents($composer_json_filepath), TRUE);
+    if (!empty($composer_json['extra']['patches'][$package])) {
+      foreach ($composer_json['extra']['patches'][$package] as $key => $patch_url) {
+        if ($patch_url == $url) {
+          unset($composer_json['extra']['patches'][$package][$key]);
+          // If that was the only patch for this module, unset the parent too.
+          if (empty($composer_json['extra']['patches'][$package])) {
+            unset($composer_json['extra']['patches'][$package]);
+          }
+          file_put_contents($composer_json_filepath, json_encode($composer_json, JSON_PRETTY_PRINT|JSON_UNESCAPED_SLASHES));
+
+          return TRUE;
+        }
+      }
+    }
+    return FALSE;
+  }
+}
diff --git a/src/Update/Updates.php b/src/Update/Updates.php
new file mode 100644
index 000000000..6c03e558b
--- /dev/null
+++ b/src/Update/Updates.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace Acquia\Blt\Update;
+
+use Acquia\Blt\Annotations\Update;
+
+class Updates {
+
+  /** @var Updater */
+  protected $updater;
+
+  /**
+   * @param Updater $updater
+   */
+  public function setUpdater($updater) {
+    $this->updater = $updater;
+  }
+
+  /**
+   * @Update(
+   *   version = "8.5.1",
+   *   description = "Removes deprecated features patch."
+   * )
+   */
+  public function update_851() {
+    $this->updater->removePatch("drupal/features", "https://www.drupal.org/files/issues/features-2808303-2.patch");
+  }
+}
diff --git a/template/project.yml b/template/project.yml
index 75ef3aed7..62bff58cc 100644
--- a/template/project.yml
+++ b/template/project.yml
@@ -70,8 +70,7 @@ target-hooks:
 # Define any custom Phing files that you'd like to import. E.g., ${repo.root}/blt/phing/build.xml
 import: ~
 
-# An array of modules to be enabled or uninstalled automatically in dev vs prod contexts.
-# All local:* targets assume the "dev" context, whereas "deploy:*" targets assume a prod context.
+# An array of modules to be enabled or uninstalled automatically in local, ci, and deploy contexts.
 modules:
   ci:
     enable: []