diff --git a/.gitlab/CODEOWNERS b/.gitlab/CODEOWNERS
index fa87b981f5d7bad08f6536905eea93f329a722d7..21a376c4885e8be438804d0e18f14e3387c45259 100644
--- a/.gitlab/CODEOWNERS
+++ b/.gitlab/CODEOWNERS
@@ -10,17 +10,24 @@
 *.md @gl-docsteam
 
 # Frontend maintainers should see everything in `app/assets/`
-app/assets/ @gitlab-org/maintainers/frontend
 *.scss @annabeldunstone @gitlab-org/maintainers/frontend
-/scripts/frontend/ @gitlab-org/maintainers/frontend
+*.js @gitlab-org/maintainers/frontend
+/app/assets/ @gitlab-org/maintainers/frontend
+/ee/app/assets/ @gitlab-org/maintainers/frontend
+/spec/javascripts/ @gitlab-org/maintainers/frontend
+/ee/spec/javascripts/ @gitlab-org/maintainers/frontend
+/spec/frontend/ @gitlab-org/maintainers/frontend
+/ee/spec/frontend/ @gitlab-org/maintainers/frontend
 
 # Database maintainers should review changes in `db/`
-db/ @gitlab-org/maintainers/database
-lib/gitlab/background_migration/ @gitlab-org/maintainers/database
-lib/gitlab/database/ @gitlab-org/maintainers/database
-lib/gitlab/sql/ @gitlab-org/maintainers/database
-lib/gitlab/github_import/ @gitlab-org/maintainers/database
+/db/ @gitlab-org/maintainers/database
 /ee/db/ @gitlab-org/maintainers/database
+/lib/gitlab/background_migration/ @gitlab-org/maintainers/database
+/ee/lib/ee/gitlab/background_migration/ @gitlab-org/maintainers/database
+/lib/gitlab/database/ @gitlab-org/maintainers/database
+/ee/lib/gitlab/database/ @gitlab-org/maintainers/database
+/lib/gitlab/sql/ @gitlab-org/maintainers/database
+/lib/gitlab/github_import/ @gitlab-org/maintainers/database
 /app/finders/ @gitlab-org/maintainers/database
 /ee/app/finders/ @gitlab-org/maintainers/database
 
@@ -40,14 +47,14 @@ lib/gitlab/github_import/ @gitlab-org/maintainers/database
 # Engineering Productivity owned files
 /.gitlab-ci.yml @gl-quality/eng-prod
 /.gitlab/ci/ @gl-quality/eng-prod
+/.gitlab/ci/docs.gitlab-ci.yml @gl-quality/eng-prod @gl-docsteam
+/.gitlab/ci/releases.gitlab-ci.yml @gl-quality/eng-prod @gitlab-org/delivery
 /.gitlab/CODEOWNERS @gl-quality/eng-prod
 Dangerfile @gl-quality/eng-prod
 /danger/ @gl-quality/eng-prod
 /lib/gitlab/danger/ @gl-quality/eng-prod
 /scripts/ @gl-quality/eng-prod
-
-# Delivery owner files
-/.gitlab/ci/releases.gitlab-ci.yml @gitlab-org/delivery
+/scripts/frontend/ @gl-quality/eng-prod @gitlab-org/maintainers/frontend
 
 # Telemetry owner files
 /ee/lib/gitlab/usage_data_counters/ @gitlab-org/growth/telemetry
diff --git a/app/assets/javascripts/blob/suggest_gitlab_ci_yml/components/popover.vue b/app/assets/javascripts/blob/suggest_gitlab_ci_yml/components/popover.vue
index d304ae7dbf64df3d4d2bba631974c866f81501b8..7f0c232eea8dcc914a129c92c4e12d85fedfc933 100644
--- a/app/assets/javascripts/blob/suggest_gitlab_ci_yml/components/popover.vue
+++ b/app/assets/javascripts/blob/suggest_gitlab_ci_yml/components/popover.vue
@@ -4,6 +4,9 @@ import Cookies from 'js-cookie';
 import { parseBoolean, scrollToElement } from '~/lib/utils/common_utils';
 import { s__ } from '~/locale';
 import { glEmojiTag } from '~/emoji';
+import Tracking from '~/tracking';
+
+const trackingMixin = Tracking.mixin();
 
 const popoverStates = {
   suggest_gitlab_ci_yml: {
@@ -27,6 +30,7 @@ export default {
     GlIcon,
     GlButton,
   },
+  mixins: [trackingMixin],
   props: {
     target: {
       type: String,
@@ -40,10 +44,18 @@ export default {
       type: String,
       required: true,
     },
+    humanAccess: {
+      type: String,
+      required: true,
+    },
   },
   data() {
     return {
       popoverDismissed: parseBoolean(Cookies.get(this.dismissKey)),
+      tracking: {
+        label: this.trackLabel,
+        property: this.humanAccess,
+      },
     };
   },
   computed: {
@@ -60,12 +72,17 @@ export default {
   mounted() {
     if (this.trackLabel === 'suggest_commit_first_project_gitlab_ci_yml' && !this.popoverDismissed)
       scrollToElement(document.querySelector(this.target));
+
+    this.trackOnShow();
   },
   methods: {
     onDismiss() {
       this.popoverDismissed = true;
       Cookies.set(this.dismissKey, this.popoverDismissed, { expires: 365 });
     },
+    trackOnShow() {
+      if (!this.popoverDismissed) this.track();
+    },
   },
 };
 </script>
diff --git a/app/assets/javascripts/blob/suggest_gitlab_ci_yml/index.js b/app/assets/javascripts/blob/suggest_gitlab_ci_yml/index.js
index 2cc342fb38187f9b3b91a4cf64094f0f7f36cef3..3b67b3dd259e5e4f41cbccf3fc6d2d44a94ead4a 100644
--- a/app/assets/javascripts/blob/suggest_gitlab_ci_yml/index.js
+++ b/app/assets/javascripts/blob/suggest_gitlab_ci_yml/index.js
@@ -10,6 +10,7 @@ export default el =>
           target: el.dataset.target,
           trackLabel: el.dataset.trackLabel,
           dismissKey: el.dataset.dismissKey,
+          humanAccess: el.dataset.humanAccess,
         },
       });
     },
diff --git a/app/assets/javascripts/ide/components/preview/clientside.vue b/app/assets/javascripts/ide/components/preview/clientside.vue
index beb179d041130ada53c76a005d53862bbc8feb2f..aa8d932da6eedd815171530dfdec8710ba65963f 100644
--- a/app/assets/javascripts/ide/components/preview/clientside.vue
+++ b/app/assets/javascripts/ide/components/preview/clientside.vue
@@ -21,7 +21,7 @@ export default {
     };
   },
   computed: {
-    ...mapState(['entries', 'promotionSvgPath', 'links']),
+    ...mapState(['entries', 'promotionSvgPath', 'links', 'codesandboxBundlerUrl']),
     ...mapGetters(['packageJson', 'currentProject']),
     normalizedEntries() {
       return Object.keys(this.entries).reduce((acc, path) => {
@@ -106,12 +106,7 @@ export default {
       return this.loadFileContent(this.mainEntry)
         .then(() => this.$nextTick())
         .then(() => {
-          this.initManager('#ide-preview', this.sandboxOpts, {
-            fileResolver: {
-              isFile: p => Promise.resolve(Boolean(this.entries[createPathWithExt(p)])),
-              readFile: p => this.loadFileContent(createPathWithExt(p)).then(content => content),
-            },
-          });
+          this.initManager();
 
           this.listener = listen(e => {
             switch (e.type) {
@@ -139,8 +134,18 @@ export default {
         this.manager.updatePreview(this.sandboxOpts);
       }, 250);
     },
-    initManager(el, opts, resolver) {
-      this.manager = new Manager(el, opts, resolver);
+    initManager() {
+      const { codesandboxBundlerUrl: bundlerURL } = this;
+
+      const settings = {
+        fileResolver: {
+          isFile: p => Promise.resolve(Boolean(this.entries[createPathWithExt(p)])),
+          readFile: p => this.loadFileContent(createPathWithExt(p)).then(content => content),
+        },
+        ...(bundlerURL ? { bundlerURL } : {}),
+      };
+
+      this.manager = new Manager('#ide-preview', this.sandboxOpts, settings);
     },
   },
 };
diff --git a/app/assets/javascripts/ide/index.js b/app/assets/javascripts/ide/index.js
index a3450522697d01625de8741926d3194bc6c6694b..9e9d9df8f828d5f7b0fe0d63f59a7f95290c5d4c 100644
--- a/app/assets/javascripts/ide/index.js
+++ b/app/assets/javascripts/ide/index.js
@@ -53,6 +53,7 @@ export function initIde(el, options = {}) {
         clientsidePreviewEnabled: parseBoolean(el.dataset.clientsidePreviewEnabled),
         renderWhitespaceInCode: parseBoolean(el.dataset.renderWhitespaceInCode),
         editorTheme: window.gon?.user_color_scheme || DEFAULT_THEME,
+        codesandboxBundlerUrl: el.dataset.codesandboxBundlerUrl,
       });
     },
     methods: {
diff --git a/app/assets/javascripts/ide/stores/state.js b/app/assets/javascripts/ide/stores/state.js
index a714562c5b2f4651337389ab460fb8d104a510ce..0fd6a4482838edc105cb2156a5aac7441a839790 100644
--- a/app/assets/javascripts/ide/stores/state.js
+++ b/app/assets/javascripts/ide/stores/state.js
@@ -34,4 +34,5 @@ export default () => ({
   clientsidePreviewEnabled: false,
   renderWhitespaceInCode: false,
   editorTheme: DEFAULT_THEME,
+  codesandboxBundlerUrl: null,
 });
diff --git a/app/assets/javascripts/sidebar/components/time_tracking/sidebar_time_tracking.vue b/app/assets/javascripts/sidebar/components/time_tracking/sidebar_time_tracking.vue
index 018b30d2a6767a503ffc590f7460ba922dc503a3..05ad7b4ea3e605d217fae077c76494708ac13435 100644
--- a/app/assets/javascripts/sidebar/components/time_tracking/sidebar_time_tracking.vue
+++ b/app/assets/javascripts/sidebar/components/time_tracking/sidebar_time_tracking.vue
@@ -1,6 +1,6 @@
 <script>
 import $ from 'jquery';
-import _ from 'underscore';
+import { intersection } from 'lodash';
 
 import '~/smart_interval';
 
@@ -38,7 +38,7 @@ export default {
       } else {
         changedCommands = [];
       }
-      if (changedCommands && _.intersection(subscribedCommands, changedCommands).length) {
+      if (changedCommands && intersection(subscribedCommands, changedCommands).length) {
         this.mediator.fetch();
       }
     },
diff --git a/app/assets/javascripts/sidebar/lib/sidebar_move_issue.js b/app/assets/javascripts/sidebar/lib/sidebar_move_issue.js
index 66d1fed7d31e20e9689e7a3a8cc79e0ab00132c0..2a61f7b5c0584ac34aaf12ccd7ca3520fb9a8849 100644
--- a/app/assets/javascripts/sidebar/lib/sidebar_move_issue.js
+++ b/app/assets/javascripts/sidebar/lib/sidebar_move_issue.js
@@ -1,6 +1,6 @@
 import $ from 'jquery';
 import '~/gl_dropdown';
-import _ from 'underscore';
+import { escape as esc } from 'lodash';
 import { __ } from '~/locale';
 
 function isValidProjectId(id) {
@@ -49,7 +49,7 @@ class SidebarMoveIssue {
       renderRow: project => `
         <li>
           <a href="#" class="js-move-issue-dropdown-item">
-            ${_.escape(project.name_with_namespace)}
+            ${esc(project.name_with_namespace)}
           </a>
         </li>
       `,
diff --git a/app/controllers/concerns/clientside_preview_csp.rb b/app/controllers/concerns/clientside_preview_csp.rb
new file mode 100644
index 0000000000000000000000000000000000000000..6892c441b674bd5fab5aff2ad74a7dd8055048e2
--- /dev/null
+++ b/app/controllers/concerns/clientside_preview_csp.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module ClientsidePreviewCSP
+  extend ActiveSupport::Concern
+
+  included do
+    content_security_policy do |p|
+      next if p.directives.blank?
+      next unless Gitlab::CurrentSettings.web_ide_clientside_preview_enabled?
+
+      default_frame_src = p.directives['frame-src'] || p.directives['default-src']
+      frame_src_values = Array.wrap(default_frame_src) | [Gitlab::CurrentSettings.web_ide_clientside_preview_bundler_url].compact
+
+      p.frame_src(*frame_src_values)
+    end
+  end
+end
diff --git a/app/controllers/ide_controller.rb b/app/controllers/ide_controller.rb
index d94f18beb5dd177219bd233852544fc736f7d6f0..8a838db04f9e2b2173b1c7711aedc29c6903068a 100644
--- a/app/controllers/ide_controller.rb
+++ b/app/controllers/ide_controller.rb
@@ -3,6 +3,7 @@
 class IdeController < ApplicationController
   layout 'fullscreen'
 
+  include ClientsidePreviewCSP
   include StaticObjectExternalStorageCSP
 
   def index
diff --git a/app/helpers/blob_helper.rb b/app/helpers/blob_helper.rb
index 9c09ddafbf16285555e3eb2bc0ad05bf7140e769..cc5ae32856a44792cd96f37c4e4dc7f6a4ce8deb 100644
--- a/app/helpers/blob_helper.rb
+++ b/app/helpers/blob_helper.rb
@@ -353,4 +353,8 @@ module BlobHelper
   def suggest_pipeline_commit_cookie_name
     "suggest_gitlab_ci_yml_commit_#{@project.id}"
   end
+
+  def human_access
+    @project.team.human_max_access(current_user&.id).try(:downcase)
+  end
 end
diff --git a/app/helpers/ide_helper.rb b/app/helpers/ide_helper.rb
index e4d0e605254f0da362edc615d3a6d7058afecf3b..d6145493ba6e4a02658d8978573e8851f42eeb93 100644
--- a/app/helpers/ide_helper.rb
+++ b/app/helpers/ide_helper.rb
@@ -10,8 +10,9 @@ module IdeHelper
       "promotion-svg-path": image_path('illustrations/web-ide_promotion.svg'),
       "ci-help-page-path" => help_page_path('ci/quick_start/README'),
       "web-ide-help-page-path" => help_page_path('user/project/web_ide/index.html'),
-      "clientside-preview-enabled": Gitlab::CurrentSettings.current_application_settings.web_ide_clientside_preview_enabled.to_s,
-      "render-whitespace-in-code": current_user.render_whitespace_in_code.to_s
+      "clientside-preview-enabled": Gitlab::CurrentSettings.web_ide_clientside_preview_enabled?.to_s,
+      "render-whitespace-in-code": current_user.render_whitespace_in_code.to_s,
+      "codesandbox-bundler-url": Gitlab::CurrentSettings.web_ide_clientside_preview_bundler_url
     }
   end
 end
diff --git a/app/models/application_setting_implementation.rb b/app/models/application_setting_implementation.rb
index 3f2106c80bf3985b381e1c35383b608738e0e766..d1a919fc01a3840569b67cd9d572b43f3fcb28b8 100644
--- a/app/models/application_setting_implementation.rb
+++ b/app/models/application_setting_implementation.rb
@@ -351,6 +351,12 @@ module ApplicationSettingImplementation
     static_objects_external_storage_url.present?
   end
 
+  # This will eventually be configurable
+  # https://gitlab.com/gitlab-org/gitlab/issues/208161
+  def web_ide_clientside_preview_bundler_url
+    'https://sandbox-prod.gitlab-static.net'
+  end
+
   private
 
   def separate_whitelists(string_array)
diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index c6481bdbb6c27c48b1d92f4822e06aee8ea54781..5436f03465715783511083e952b4c3a62594c449 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -257,7 +257,7 @@ class WikiPage
   def title_changed?
     if persisted?
       old_title, old_dir = wiki.page_title_and_dir(self.class.unhyphenize(@page.url_path))
-      new_title, new_dir = wiki.page_title_and_dir(title)
+      new_title, new_dir = wiki.page_title_and_dir(self.class.unhyphenize(title))
 
       new_title != old_title || (title.include?('/') && new_dir != old_dir)
     else
diff --git a/app/views/projects/blob/_editor.html.haml b/app/views/projects/blob/_editor.html.haml
index cd8407608a3c02212c82c0414a707c372ffb1603..51b0b2722d1d13fc7cb1f7121c9c19389194f60b 100644
--- a/app/views/projects/blob/_editor.html.haml
+++ b/app/views/projects/blob/_editor.html.haml
@@ -23,7 +23,8 @@
         .js-suggest-gitlab-ci-yml{ data: { toggle: 'popover',
           target: '#gitlab-ci-yml-selector',
           track_label: 'suggest_gitlab_ci_yml',
-          dismiss_key: "suggest_gitlab_ci_yml_#{@project.id}" } }
+          dismiss_key: "suggest_gitlab_ci_yml_#{@project.id}",
+          human_access: human_access } }
 
     .file-buttons
       - if is_markdown
diff --git a/app/views/projects/blob/new.html.haml b/app/views/projects/blob/new.html.haml
index bf7900018c31ee3a0a99b934174fc246ec220193..1afbe1fe24e0d6d8c2f08330531fafd0529c6ddc 100644
--- a/app/views/projects/blob/new.html.haml
+++ b/app/views/projects/blob/new.html.haml
@@ -17,4 +17,5 @@
       .js-suggest-gitlab-ci-yml-commit-changes{ data: { toggle: 'popover',
         target: '#commit-changes',
         track_label: 'suggest_commit_first_project_gitlab_ci_yml',
-        dismiss_key: "suggest_commit_first_project_gitlab_ci_yml_#{@project.id}" } }
+        dismiss_key: "suggest_commit_first_project_gitlab_ci_yml_#{@project.id}",
+        human_access: human_access } }
diff --git a/changelogs/unreleased/10526-smartcard_support_different_hostname.yml b/changelogs/unreleased/10526-smartcard_support_different_hostname.yml
new file mode 100644
index 0000000000000000000000000000000000000000..6990449d171e2ed8a868bb692ad5a52f2e3d2213
--- /dev/null
+++ b/changelogs/unreleased/10526-smartcard_support_different_hostname.yml
@@ -0,0 +1,5 @@
+---
+title: Make hostname configurable for smartcard authentication
+merge_request: 26411
+author:
+type: added
diff --git a/changelogs/unreleased/207623-fix-code-search-pagination.yml b/changelogs/unreleased/207623-fix-code-search-pagination.yml
new file mode 100644
index 0000000000000000000000000000000000000000..7cb90f0bef4bc016b1c67f753accd55caaf7e56e
--- /dev/null
+++ b/changelogs/unreleased/207623-fix-code-search-pagination.yml
@@ -0,0 +1,5 @@
+---
+title: Fix code search pagination on a custom branch
+merge_request: 25984
+author:
+type: fixed
diff --git a/changelogs/unreleased/209761-fix-wiki-directories-with-hyphens.yml b/changelogs/unreleased/209761-fix-wiki-directories-with-hyphens.yml
new file mode 100644
index 0000000000000000000000000000000000000000..3a18143ba7acf764eb110eb29d90e2d2e36aa351
--- /dev/null
+++ b/changelogs/unreleased/209761-fix-wiki-directories-with-hyphens.yml
@@ -0,0 +1,5 @@
+---
+title: Fix WikiPage#title_changed for paths with spaces
+merge_request: 27087
+author:
+type: fixed
diff --git a/changelogs/unreleased/27144-gitlab-hosted-codesandbox.yml b/changelogs/unreleased/27144-gitlab-hosted-codesandbox.yml
new file mode 100644
index 0000000000000000000000000000000000000000..bb7e011f94ccfcb0bff3a03a22cfbfcca1ce40c9
--- /dev/null
+++ b/changelogs/unreleased/27144-gitlab-hosted-codesandbox.yml
@@ -0,0 +1,5 @@
+---
+title: Update Web IDE clientside preview bundler to use GitLab managed server
+merge_request: 21520
+author:
+type: changed
diff --git a/config/gitlab.yml.example b/config/gitlab.yml.example
index 760688d808805a35982a9c6a14de7e92cc8a125b..81085d4641e5bfff70487ccbbba558fffe731f46 100644
--- a/config/gitlab.yml.example
+++ b/config/gitlab.yml.example
@@ -752,7 +752,9 @@ production: &base
     # Path to a file containing a CA certificate
     ca_file: '/etc/ssl/certs/CA.pem'
 
-    # Port where the client side certificate is requested by the webserver (NGINX/Apache)
+    # Host and port where the client side certificate is requested by the
+    # webserver (NGINX/Apache)
+    # client_certificate_required_host: smartcard.gitlab.example.com
     # client_certificate_required_port: 3444
 
     # Browser session with smartcard sign-in is required for Git access
diff --git a/config/initializers/1_settings.rb b/config/initializers/1_settings.rb
index f22ddc7f08179b41000d9c5e8df124a9f18a1cf8..1b368346cfaf5a2b3235bb2335cbcf66818119cc 100644
--- a/config/initializers/1_settings.rb
+++ b/config/initializers/1_settings.rb
@@ -77,6 +77,7 @@ end
 Gitlab.ee do
   Settings['smartcard'] ||= Settingslogic.new({})
   Settings.smartcard['enabled'] = false if Settings.smartcard['enabled'].nil?
+  Settings.smartcard['client_certificate_required_host'] = Settings.gitlab['host'] if Settings.smartcard['client_certificate_required_host'].nil?
   Settings.smartcard['client_certificate_required_port'] = 3444 if Settings.smartcard['client_certificate_required_port'].nil?
   Settings.smartcard['required_for_git_access'] = false if Settings.smartcard['required_for_git_access'].nil?
   Settings.smartcard['san_extensions'] = false if Settings.smartcard['san_extensions'].nil?
diff --git a/package.json b/package.json
index f8f00b67f6b9d695bacbe64f3e14d9428337fac2..fa359867ea2585dc6576d8a2eb3d59f551683a82 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "chart.js": "2.7.2",
     "classlist-polyfill": "^1.2.0",
     "clipboard": "^1.7.1",
-    "codesandbox-api": "^0.0.20",
+    "codesandbox-api": "0.0.23",
     "compression-webpack-plugin": "^3.0.1",
     "copy-webpack-plugin": "^5.0.5",
     "core-js": "^3.6.4",
@@ -110,7 +110,7 @@
     "raw-loader": "^4.0.0",
     "sanitize-html": "^1.22.0",
     "select2": "3.5.2-browserify",
-    "smooshpack": "^0.0.54",
+    "smooshpack": "^0.0.62",
     "sortablejs": "^1.10.2",
     "sql.js": "^0.4.0",
     "stickyfilljs": "^2.1.0",
diff --git a/scripts/lint-doc.sh b/scripts/lint-doc.sh
index d9440a5f05290b04b7ae8eacec8c3574033ce30c..d9de48fd0c06e41b6d8d366fbee9f5aea116e5de 100755
--- a/scripts/lint-doc.sh
+++ b/scripts/lint-doc.sh
@@ -2,36 +2,41 @@
 
 cd "$(dirname "$0")/.."
 echo "=> Linting documents at path $(pwd) as $(whoami)..."
+echo
+ERRORCODE=0
 
 # Use long options (e.g. --header instead of -H) for curl examples in documentation.
 echo '=> Checking for cURL short options...'
+echo
 grep --extended-regexp --recursive --color=auto 'curl (.+ )?-[^- ].*' doc/ >/dev/null 2>&1
 if [ $? -eq 0 ]
 then
   echo '✖ ERROR: Short options for curl should not be used in documentation!
          Use long options (e.g., --header instead of -H):' >&2
   grep --extended-regexp --recursive --color=auto 'curl (.+ )?-[^- ].*' doc/
-  exit 1
+  ((ERRORCODE++))
 fi
 
 # Ensure that the CHANGELOG.md does not contain duplicate versions
 DUPLICATE_CHANGELOG_VERSIONS=$(grep --extended-regexp '^## .+' CHANGELOG.md | sed -E 's| \(.+\)||' | sort -r | uniq -d)
 echo '=> Checking for CHANGELOG.md duplicate entries...'
+echo
 if [ "${DUPLICATE_CHANGELOG_VERSIONS}" != "" ]
 then
   echo '✖ ERROR: Duplicate versions in CHANGELOG.md:' >&2
   echo "${DUPLICATE_CHANGELOG_VERSIONS}" >&2
-  exit 1
+  ((ERRORCODE++))
 fi
 
 # Make sure no files in doc/ are executable
 EXEC_PERM_COUNT=$(find doc/ -type f -perm 755 | wc -l)
 echo "=> Checking $(pwd)/doc for executable permissions..."
+echo
 if [ "${EXEC_PERM_COUNT}" -ne 0 ]
 then
   echo '✖ ERROR: Executable permissions should not be used in documentation! Use `chmod 644` to the files in question:' >&2
   find doc/ -type f -perm 755
-  exit 1
+  ((ERRORCODE++))
 fi
 
 # Do not use 'README.md', instead use 'index.md'
@@ -39,13 +44,14 @@ fi
 NUMBER_READMES=46
 FIND_READMES=$(find doc/ -name "README.md" | wc -l)
 echo '=> Checking for new README.md files...'
+echo
 if [ ${FIND_READMES} -ne $NUMBER_READMES ]
 then
   echo
   echo '  ✖ ERROR: New README.md file(s) detected, prefer index.md over README.md.' >&2
   echo '  https://docs.gitlab.com/ee/development/documentation/styleguide.html#work-with-directories-and-files'
   echo
-  exit 1
+  ((ERRORCODE++))
 fi
 
 MD_DOC_PATH=${MD_DOC_PATH:-doc}
@@ -64,7 +70,7 @@ function run_locally_or_in_docker() {
     echo
     echo "  ✖ ERROR: '${cmd}' not found. Install '${cmd}' or Docker to proceed." >&2
     echo
-    exit 1
+    ((ERRORCODE++))
   fi
 
   if [ $? -ne 0 ]
@@ -72,15 +78,22 @@ function run_locally_or_in_docker() {
     echo
     echo "  ✖ ERROR: '${cmd}' failed with errors." >&2
     echo
-    exit 1
+    ((ERRORCODE++))
   fi
 }
 
 echo '=> Linting markdown style...'
+echo
 run_locally_or_in_docker 'markdownlint' "--config .markdownlint.json ${MD_DOC_PATH}"
 
 echo '=> Linting prose...'
 run_locally_or_in_docker 'vale' "--minAlertLevel error ${MD_DOC_PATH}"
 
-echo "✔ Linting passed"
-exit 0
+if [ $ERRORCODE -ne 0 ]
+then
+  echo "✖ ${ERRORCODE} lint test(s) failed. Review the log carefully to see full listing."
+  exit 1
+else
+  echo "✔ Linting passed"
+  exit 0
+fi
diff --git a/scripts/security-harness b/scripts/security-harness
index a1642489fe2627de52e045c3c0a7ccc4d69b46ee..a0fa57ef042c5493eaff73ca536df1c39cd22fc2 100755
--- a/scripts/security-harness
+++ b/scripts/security-harness
@@ -28,9 +28,9 @@ HOOK_DATA = <<~HOOK
 
   if [ -e "$harness" ]
   then
-    if [[ ("$url" != *"dev.gitlab.org"*) && ("$url" != *"gitlab-org/security/"*) ]]
+    if [["$url" != *"gitlab-org/security/"*]]
     then
-      echo "Pushing to remotes other than dev.gitlab.org and gitlab.com/gitlab-org/security has been disabled!"
+      echo "Pushing to remotes other than gitlab.com/gitlab-org/security has been disabled!"
       echo "Run scripts/security-harness to disable this check."
       echo
 
@@ -58,7 +58,7 @@ def toggle
   else
     FileUtils.touch(harness_path)
 
-    puts "#{SHELL_GREEN}Security harness installed -- you will only be able to push to dev.gitlab.org or gitlab.com/gitlab-org/security!#{SHELL_CLEAR}"
+    puts "#{SHELL_GREEN}Security harness installed -- you will only be able to push to gitlab.com/gitlab-org/security!#{SHELL_CLEAR}"
   end
 end
 
diff --git a/spec/features/ide/clientside_preview_csp_spec.rb b/spec/features/ide/clientside_preview_csp_spec.rb
new file mode 100644
index 0000000000000000000000000000000000000000..e097513def3abfceb32cea8ca82fa75632b52670
--- /dev/null
+++ b/spec/features/ide/clientside_preview_csp_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'IDE Clientside Preview CSP' do
+  let_it_be(:user) { create(:user) }
+
+  shared_context 'disable feature' do
+    before do
+      allow_next_instance_of(ApplicationSetting) do |instance|
+        allow(instance).to receive(:web_ide_clientside_preview_enabled?).and_return(false)
+      end
+    end
+  end
+
+  it_behaves_like 'setting CSP', 'frame-src' do
+    let(:whitelisted_url) { 'https://sandbox.gitlab-static.test' }
+    let(:extended_controller_class) { IdeController }
+
+    subject do
+      visit ide_path
+
+      response_headers['Content-Security-Policy']
+    end
+
+    before do
+      allow_next_instance_of(ApplicationSetting) do |instance|
+        allow(instance).to receive(:web_ide_clientside_preview_enabled?).and_return(true)
+        allow(instance).to receive(:web_ide_clientside_preview_bundler_url).and_return(whitelisted_url)
+      end
+
+      sign_in(user)
+    end
+  end
+end
diff --git a/spec/features/ide/static_object_external_storage_csp_spec.rb b/spec/features/ide/static_object_external_storage_csp_spec.rb
index 93c22b357868df978bb78a6f358ddb49662af7b4..739b3fe2471abfe2caeb38eba4b1731cefb764cd 100644
--- a/spec/features/ide/static_object_external_storage_csp_spec.rb
+++ b/spec/features/ide/static_object_external_storage_csp_spec.rb
@@ -11,7 +11,7 @@ describe 'Static Object External Storage Content Security Policy' do
     end
   end
 
-  it_behaves_like 'setting CSP connect-src' do
+  it_behaves_like 'setting CSP', 'connect-src' do
     let_it_be(:whitelisted_url) { 'https://static-objects.test' }
     let_it_be(:extended_controller_class) { IdeController }
 
diff --git a/spec/features/projects/sourcegraph_csp_spec.rb b/spec/features/projects/sourcegraph_csp_spec.rb
index 385a797368c133ed53bceead163559d3aa64b99f..f252d3cd027f983915431933662078dbe23daa05 100644
--- a/spec/features/projects/sourcegraph_csp_spec.rb
+++ b/spec/features/projects/sourcegraph_csp_spec.rb
@@ -12,7 +12,7 @@ describe 'Sourcegraph Content Security Policy' do
     end
   end
 
-  it_behaves_like 'setting CSP connect-src' do
+  it_behaves_like 'setting CSP', 'connect-src' do
     let_it_be(:whitelisted_url) { 'https://sourcegraph.test' }
     let_it_be(:extended_controller_class) { Projects::BlobController }
 
diff --git a/spec/frontend/blob/suggest_gitlab_ci_yml/components/popover_spec.js b/spec/frontend/blob/suggest_gitlab_ci_yml/components/popover_spec.js
index 2c7891e4b1ad80d267677d68b2513d2f5966bab3..43e92bdca5fed56db2da4e95fd407f273b78ce19 100644
--- a/spec/frontend/blob/suggest_gitlab_ci_yml/components/popover_spec.js
+++ b/spec/frontend/blob/suggest_gitlab_ci_yml/components/popover_spec.js
@@ -1,6 +1,7 @@
 import { shallowMount } from '@vue/test-utils';
 import Popover from '~/blob/suggest_gitlab_ci_yml/components/popover.vue';
 import Cookies from 'js-cookie';
+import { mockTracking, unmockTracking } from 'helpers/tracking_helper';
 import * as utils from '~/lib/utils/common_utils';
 
 jest.mock('~/lib/utils/common_utils', () => ({
@@ -11,6 +12,8 @@ jest.mock('~/lib/utils/common_utils', () => ({
 const target = 'gitlab-ci-yml-selector';
 const dismissKey = 'suggest_gitlab_ci_yml_99';
 const defaultTrackLabel = 'suggest_gitlab_ci_yml';
+const commitTrackLabel = 'suggest_commit_first_project_gitlab_ci_yml';
+const humanAccess = 'owner';
 
 describe('Suggest gitlab-ci.yml Popover', () => {
   let wrapper;
@@ -21,6 +24,7 @@ describe('Suggest gitlab-ci.yml Popover', () => {
         target,
         trackLabel,
         dismissKey,
+        humanAccess,
       },
     });
   }
@@ -50,15 +54,43 @@ describe('Suggest gitlab-ci.yml Popover', () => {
       expect(wrapper.vm.popoverDismissed).toEqual(true);
     });
 
-    beforeEach(() => {
+    afterEach(() => {
       Cookies.remove(dismissKey);
     });
   });
 
+  describe('tracking', () => {
+    let trackingSpy;
+
+    beforeEach(() => {
+      createWrapper(commitTrackLabel);
+      trackingSpy = mockTracking('_category_', wrapper.element, jest.spyOn);
+    });
+
+    afterEach(() => {
+      unmockTracking();
+    });
+
+    it('sends a tracking event with the expected properties for the popover being viewed', () => {
+      const expectedCategory = undefined;
+      const expectedAction = undefined;
+      const expectedLabel = 'suggest_commit_first_project_gitlab_ci_yml';
+      const expectedProperty = 'owner';
+
+      document.body.dataset.page = 'projects:blob:new';
+
+      wrapper.vm.trackOnShow();
+
+      expect(trackingSpy).toHaveBeenCalledWith(expectedCategory, expectedAction, {
+        label: expectedLabel,
+        property: expectedProperty,
+      });
+    });
+  });
+
   describe('when the popover is mounted with the trackLabel of the Confirm button popover at the bottom of the page', () => {
     it('calls scrollToElement so that the Confirm button and popover will be in sight', () => {
       const scrollToElementSpy = jest.spyOn(utils, 'scrollToElement');
-      const commitTrackLabel = 'suggest_commit_first_project_gitlab_ci_yml';
 
       createWrapper(commitTrackLabel);
 
diff --git a/spec/frontend/ide/components/preview/clientside_spec.js b/spec/frontend/ide/components/preview/clientside_spec.js
index c7d5ea9c5131d9e66116ceebb718704499f7effe..0cde6fb606004a398ea2a885b73d34e031f9f737 100644
--- a/spec/frontend/ide/components/preview/clientside_spec.js
+++ b/spec/frontend/ide/components/preview/clientside_spec.js
@@ -16,6 +16,17 @@ const dummyPackageJson = () => ({
     main: 'index.js',
   }),
 });
+const expectedSandpackOptions = () => ({
+  files: {},
+  entry: '/index.js',
+  showOpenInCodeSandbox: true,
+});
+const expectedSandpackSettings = () => ({
+  fileResolver: {
+    isFile: expect.any(Function),
+    readFile: expect.any(Function),
+  },
+});
 
 describe('IDE clientside preview', () => {
   let wrapper;
@@ -84,6 +95,46 @@ describe('IDE clientside preview', () => {
       return waitForCalls();
     });
 
+    it('creates sandpack manager', () => {
+      expect(smooshpack.Manager).toHaveBeenCalledWith(
+        '#ide-preview',
+        expectedSandpackOptions(),
+        expectedSandpackSettings(),
+      );
+    });
+
+    it('pings usage', () => {
+      expect(storeClientsideActions.pingUsage).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('with codesandboxBundlerUrl', () => {
+    const TEST_BUNDLER_URL = 'https://test.gitlab-static.test';
+
+    beforeEach(() => {
+      createComponent({
+        getters: { packageJson: dummyPackageJson },
+        state: { codesandboxBundlerUrl: TEST_BUNDLER_URL },
+      });
+
+      return waitForCalls();
+    });
+
+    it('creates sandpack manager with bundlerURL', () => {
+      expect(smooshpack.Manager).toHaveBeenCalledWith('#ide-preview', expectedSandpackOptions(), {
+        ...expectedSandpackSettings(),
+        bundlerURL: TEST_BUNDLER_URL,
+      });
+    });
+  });
+
+  describe('with codesandboxBundlerURL', () => {
+    beforeEach(() => {
+      createComponent({ getters: { packageJson: dummyPackageJson } });
+
+      return waitForCalls();
+    });
+
     it('creates sandpack manager', () => {
       expect(smooshpack.Manager).toHaveBeenCalledWith(
         '#ide-preview',
@@ -100,10 +151,6 @@ describe('IDE clientside preview', () => {
         },
       );
     });
-
-    it('pings usage', () => {
-      expect(storeClientsideActions.pingUsage).toHaveBeenCalledTimes(1);
-    });
   });
 
   describe('computed', () => {
diff --git a/spec/models/wiki_page_spec.rb b/spec/models/wiki_page_spec.rb
index dd6690b4d1e45c2b6004ebc57b1ac8e3018b5679..42a7d5676130bd77e3dad2137cad0943f3a4e0b9 100644
--- a/spec/models/wiki_page_spec.rb
+++ b/spec/models/wiki_page_spec.rb
@@ -480,29 +480,39 @@ describe WikiPage do
 
     let(:untitled_page) { described_class.new(wiki) }
     let(:directory_page) do
-      create_page('parent/child', 'test content')
-      wiki.find_page('parent/child')
+      create_page('parent directory/child page', 'test content')
+      wiki.find_page('parent directory/child page')
     end
 
     where(:page, :title, :changed) do
-      :untitled_page  | nil            | false
-      :untitled_page  | 'new title'    | true
-
-      :new_page       | nil            | true
-      :new_page       | 'test page'    | true
-      :new_page       | 'new title'    | true
-
-      :existing_page  | nil            | false
-      :existing_page  | 'test page'    | false
-      :existing_page  | '/test page'   | false
-      :existing_page  | 'new title'    | true
-
-      :directory_page | nil            | false
-      :directory_page | 'parent/child' | false
-      :directory_page | 'child'        | false
-      :directory_page | '/child'       | true
-      :directory_page | 'parent/other' | true
-      :directory_page | 'other/child'  | true
+      :untitled_page  | nil                             | false
+      :untitled_page  | 'new title'                     | true
+
+      :new_page       | nil                             | true
+      :new_page       | 'test page'                     | true
+      :new_page       | 'new title'                     | true
+
+      :existing_page  | nil                             | false
+      :existing_page  | 'test page'                     | false
+      :existing_page  | 'test-page'                     | false
+      :existing_page  | '/test page'                    | false
+      :existing_page  | '/test-page'                    | false
+      :existing_page  | ' test page '                   | true
+      :existing_page  | 'new title'                     | true
+      :existing_page  | 'new-title'                     | true
+
+      :directory_page | nil                             | false
+      :directory_page | 'parent directory/child page'   | false
+      :directory_page | 'parent-directory/child page'   | false
+      :directory_page | 'parent-directory/child-page'   | false
+      :directory_page | 'child page'                    | false
+      :directory_page | 'child-page'                    | false
+      :directory_page | '/child page'                   | true
+      :directory_page | 'parent directory/other'        | true
+      :directory_page | 'parent-directory/other'        | true
+      :directory_page | 'parent-directory / child-page' | true
+      :directory_page | 'other directory/child page'    | true
+      :directory_page | 'other-directory/child page'    | true
     end
 
     with_them do
diff --git a/spec/support/shared_examples/csp.rb b/spec/support/shared_examples/csp.rb
index 10c4158522f765c07415c9da28e1244e0fafb713..c4a8c7df898c9faf8488a902d0fa12dfcfd17d88 100644
--- a/spec/support/shared_examples/csp.rb
+++ b/spec/support/shared_examples/csp.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.shared_examples 'setting CSP connect-src' do
+RSpec.shared_examples 'setting CSP' do |rule_name|
   let_it_be(:default_csp_values) { "'self' https://some-cdn.test" }
 
   shared_context 'csp config' do |csp_rule|
@@ -10,7 +10,7 @@ RSpec.shared_examples 'setting CSP connect-src' do
       end
 
       expect_next_instance_of(extended_controller_class) do |controller|
-        expect(controller).to receive(:current_content_security_policy).and_return(csp)
+        expect(controller).to receive(:current_content_security_policy).at_least(:once).and_return(csp)
       end
     end
   end
@@ -23,55 +23,55 @@ RSpec.shared_examples 'setting CSP connect-src' do
     end
   end
 
-  describe 'when a CSP config exists for connect-src' do
-    include_context 'csp config', :connect_src
+  describe "when a CSP config exists for #{rule_name}" do
+    include_context 'csp config', rule_name.parameterize.underscore.to_sym
 
     context 'when feature is enabled' do
-      it 'appends to connect-src' do
-        is_expected.to eql("connect-src #{default_csp_values} #{whitelisted_url}")
+      it "appends to #{rule_name}" do
+        is_expected.to eql("#{rule_name} #{default_csp_values} #{whitelisted_url}")
       end
     end
 
     context 'when feature is disabled' do
       include_context 'disable feature'
 
-      it 'keeps original connect-src' do
-        is_expected.to eql("connect-src #{default_csp_values}")
+      it "keeps original #{rule_name}" do
+        is_expected.to eql("#{rule_name} #{default_csp_values}")
       end
     end
   end
 
-  describe 'when a CSP config exists for default-src but not connect-src' do
+  describe "when a CSP config exists for default-src but not #{rule_name}" do
     include_context 'csp config', :default_src
 
     context 'when feature is enabled' do
-      it 'uses default-src values in connect-src' do
-        is_expected.to eql("default-src #{default_csp_values}; connect-src #{default_csp_values} #{whitelisted_url}")
+      it "uses default-src values in #{rule_name}" do
+        is_expected.to eql("default-src #{default_csp_values}; #{rule_name} #{default_csp_values} #{whitelisted_url}")
       end
     end
 
     context 'when feature is disabled' do
       include_context 'disable feature'
 
-      it 'does not add connect-src' do
+      it "does not add #{rule_name}" do
         is_expected.to eql("default-src #{default_csp_values}")
       end
     end
   end
 
-  describe 'when a CSP config exists for font-src but not connect-src' do
+  describe "when a CSP config exists for font-src but not #{rule_name}" do
     include_context 'csp config', :font_src
 
     context 'when feature is enabled' do
-      it 'uses default-src values in connect-src' do
-        is_expected.to eql("font-src #{default_csp_values}; connect-src #{whitelisted_url}")
+      it "uses default-src values in #{rule_name}" do
+        is_expected.to eql("font-src #{default_csp_values}; #{rule_name} #{whitelisted_url}")
       end
     end
 
     context 'when feature is disabled' do
       include_context 'disable feature'
 
-      it 'does not add connect-src' do
+      it "does not add #{rule_name}" do
         is_expected.to eql("font-src #{default_csp_values}")
       end
     end
diff --git a/yarn.lock b/yarn.lock
index b93a588c9927371b71cbcb1fdce97ef0879cea9f..a63486153099f968a08dba7498ed930cd2d94fe5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2779,10 +2779,10 @@ code-point-at@^1.0.0:
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
   integrity sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=
 
-codesandbox-api@^0.0.20:
-  version "0.0.20"
-  resolved "https://registry.yarnpkg.com/codesandbox-api/-/codesandbox-api-0.0.20.tgz#174bcd76c9f31521175c6bceabc37da6b1fbc30b"
-  integrity sha512-jhxZzAmjCKBZad8QWMeueiQVFE87igK6F2DBOEVFFJO6jgTXT8qjuzGYepr+B8bjgo/icN7bc/2xmEMBA63s2w==
+codesandbox-api@0.0.23:
+  version "0.0.23"
+  resolved "https://registry.yarnpkg.com/codesandbox-api/-/codesandbox-api-0.0.23.tgz#bf650a21b5f3c2369e03f0c19d10b4e2ba255b4f"
+  integrity sha512-fFGBkIghDkQILh7iHYlpZU5sfWncCDb92FQSFE4rR3VBcTfUsD5VZgpQi+JjZQuwWIdfl4cOhcIFrUYwshUezA==
 
 codesandbox-import-util-types@^1.2.11:
   version "1.2.11"
@@ -10334,12 +10334,12 @@ slugify@^1.3.1:
   resolved "https://registry.yarnpkg.com/slugify/-/slugify-1.3.1.tgz#f572127e8535329fbc6c1edb74ab856b61ad7de2"
   integrity sha512-6BwyhjF5tG5P8s+0DPNyJmBSBePG6iMyhjvIW5zGdA3tFik9PtK+yNkZgTeiroCRGZYgkHftFA62tGVK1EI9Kw==
 
-smooshpack@^0.0.54:
-  version "0.0.54"
-  resolved "https://registry.yarnpkg.com/smooshpack/-/smooshpack-0.0.54.tgz#9044358b85052d348b801f385678c8a0c76f2bb6"
-  integrity sha512-yIwEWb17hqoW5IaWyzO6O6nxY89I5UdRoGIZy5hihoqXP9OYcoMbBTxKwS57MeXSKdNA2rtk86rlCcOgAYIgrA==
+smooshpack@^0.0.62:
+  version "0.0.62"
+  resolved "https://registry.yarnpkg.com/smooshpack/-/smooshpack-0.0.62.tgz#cb31b9f808f73de3146b050f84d044eb353b5503"
+  integrity sha512-lFuJV2f504/U78sifWy0V2FyoE/8mTgOXM4DL918ncNxAxbtu236XSCLAH3SQwXZWn0JdmRnWs/XU4+sIUVVmQ==
   dependencies:
-    codesandbox-api "^0.0.20"
+    codesandbox-api "0.0.23"
     codesandbox-import-utils "^1.2.3"
     lodash.isequal "^4.5.0"