diff --git a/.gitlab/ci/rails.gitlab-ci.yml b/.gitlab/ci/rails.gitlab-ci.yml
index 4f6180e2aa3..dce5b72344d 100644
--- a/.gitlab/ci/rails.gitlab-ci.yml
+++ b/.gitlab/ci/rails.gitlab-ci.yml
@@ -519,10 +519,26 @@ rspec:coverage:
     paths:
       - coverage/index.html
       - coverage/assets/
+      - coverage/lcov/
       - tmp/memory_test/
     reports:
       cobertura: coverage/coverage.xml
 
+rspec:undercoverage:
+  extends:
+    - .coverage-base
+    - .rails:rules:rspec-undercoverage
+  stage: post-test
+  needs: ["rspec:coverage"]
+  script:
+    - if [ -n "$CI_MERGE_REQUEST_SOURCE_BRANCH_SHA" ]; then
+        echo "Checking out \$CI_MERGE_REQUEST_SOURCE_BRANCH_SHA ($CI_MERGE_REQUEST_SOURCE_BRANCH_SHA) instead of \$CI_COMMIT_SHA (merge result commit $CI_COMMIT_SHA) so we can use $CI_MERGE_REQUEST_DIFF_BASE_SHA for undercoverage in this merged result pipeline";
+        git checkout -f ${CI_MERGE_REQUEST_SOURCE_BRANCH_SHA};
+      else
+        echo "Using \$CI_COMMIT_SHA ($CI_COMMIT_SHA) for this non-merge result pipeline.";
+      fi;
+    - run_timed_command "scripts/undercoverage"
+
 rspec:feature-flags:
   extends:
     - .coverage-base
diff --git a/.gitlab/ci/rules.gitlab-ci.yml b/.gitlab/ci/rules.gitlab-ci.yml
index aaa486fce68..c9854fad2b6 100644
--- a/.gitlab/ci/rules.gitlab-ci.yml
+++ b/.gitlab/ci/rules.gitlab-ci.yml
@@ -67,6 +67,9 @@
 .if-merge-request-labels-run-review-app: &if-merge-request-labels-run-review-app
   if: '$CI_MERGE_REQUEST_LABELS =~ /pipeline:run-review-app/'
 
+.if-merge-request-labels-skip-undercoverage: &if-merge-request-labels-skip-undercoverage
+  if: '$CI_MERGE_REQUEST_LABELS =~ /pipeline:skip-undercoverage/'
+
 .if-security-merge-request: &if-security-merge-request
   if: '$CI_PROJECT_NAMESPACE == "gitlab-org/security" && $CI_MERGE_REQUEST_IID'
 
@@ -1359,6 +1362,17 @@
     - <<: *if-merge-request-labels-run-all-rspec
       when: always
 
+.rails:rules:rspec-undercoverage:
+  rules:
+    - <<: *if-not-ee
+      when: never
+    - <<: *if-merge-request-labels-skip-undercoverage
+      allow_failure: true
+    - <<: *if-merge-request-labels-run-all-rspec
+    - <<: *if-merge-request-approved
+    - <<: *if-merge-request
+      changes: *backend-patterns
+
 .rails:rules:default-branch-schedule-nightly--code-backstage:
   rules:
     - <<: *if-default-branch-schedule-nightly
diff --git a/GITALY_SERVER_VERSION b/GITALY_SERVER_VERSION
index 8e2779fa0a1..8dbc2c2803b 100644
--- a/GITALY_SERVER_VERSION
+++ b/GITALY_SERVER_VERSION
@@ -1 +1 @@
-4dd8bfe1307ffcc5a2a3f4eb70da7977a7c1d915
+a191a5d10f0772ae2ed6ec869001ddde6d277827
diff --git a/Gemfile b/Gemfile
index 4a6ad99a76a..1d379042099 100644
--- a/Gemfile
+++ b/Gemfile
@@ -405,7 +405,9 @@ end
 
 group :development, :test, :coverage do
   gem 'simplecov', '~> 0.18.5', require: false
+  gem 'simplecov-lcov', '~> 0.8.0', require: false
   gem 'simplecov-cobertura', '~> 1.3.1', require: false
+  gem 'undercover', '~> 0.4.4', require: false
 end
 
 # Gems required in omnibus-gitlab pipeline
diff --git a/Gemfile.lock b/Gemfile.lock
index f508dab2d8e..8a1a1a65757 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -645,6 +645,8 @@ GEM
       concurrent-ruby (~> 1.0)
     i18n_data (0.8.0)
     icalendar (2.4.1)
+    imagen (0.1.8)
+      parser (>= 2.5, != 2.5.1.1)
     invisible_captcha (1.1.0)
       rails (>= 4.2)
     ipaddress (0.8.3)
@@ -1197,6 +1199,7 @@ GEM
     simplecov-cobertura (1.3.1)
       simplecov (~> 0.8)
     simplecov-html (0.12.3)
+    simplecov-lcov (0.8.0)
     sixarm_ruby_unaccent (1.2.0)
     slack-messenger (2.3.4)
     snowplow-tracker (0.6.1)
@@ -1312,6 +1315,10 @@ GEM
       concurrent-ruby (~> 1.0)
     u2f (0.2.1)
     uber (0.1.0)
+    undercover (0.4.4)
+      imagen (>= 0.1.8)
+      rainbow (>= 2.1, < 4.0)
+      rugged (>= 0.27, < 1.3)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
@@ -1626,6 +1633,7 @@ DEPENDENCIES
   simple_po_parser (~> 1.1.2)
   simplecov (~> 0.18.5)
   simplecov-cobertura (~> 1.3.1)
+  simplecov-lcov (~> 0.8.0)
   slack-messenger (~> 2.3.4)
   snowplow-tracker (~> 0.6.1)
   solargraph (~> 0.43)
@@ -1648,6 +1656,7 @@ DEPENDENCIES
   toml-rb (~> 2.0)
   truncato (~> 0.7.11)
   u2f (~> 0.2.1)
+  undercover (~> 0.4.4)
   unf (~> 0.1.4)
   unleash (~> 3.2.2)
   valid_email (~> 0.1)
diff --git a/app/assets/javascripts/content_editor/extensions/footnote_definition.js b/app/assets/javascripts/content_editor/extensions/footnote_definition.js
new file mode 100644
index 00000000000..dbab0de3421
--- /dev/null
+++ b/app/assets/javascripts/content_editor/extensions/footnote_definition.js
@@ -0,0 +1,21 @@
+import { mergeAttributes, Node } from '@tiptap/core';
+import { PARSE_HTML_PRIORITY_HIGHEST } from '../constants';
+
+export default Node.create({
+  name: 'footnoteDefinition',
+
+  content: 'paragraph',
+
+  group: 'block',
+
+  parseHTML() {
+    return [
+      { tag: 'section.footnotes li' },
+      { tag: '.footnote-backref', priority: PARSE_HTML_PRIORITY_HIGHEST, ignore: true },
+    ];
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return ['li', mergeAttributes(HTMLAttributes), 0];
+  },
+});
diff --git a/app/assets/javascripts/content_editor/extensions/footnote_reference.js b/app/assets/javascripts/content_editor/extensions/footnote_reference.js
new file mode 100644
index 00000000000..1ac8016f774
--- /dev/null
+++ b/app/assets/javascripts/content_editor/extensions/footnote_reference.js
@@ -0,0 +1,37 @@
+import { Node, mergeAttributes } from '@tiptap/core';
+import { PARSE_HTML_PRIORITY_HIGHEST } from '../constants';
+
+export default Node.create({
+  name: 'footnoteReference',
+
+  inline: true,
+
+  group: 'inline',
+
+  atom: true,
+
+  draggable: true,
+
+  selectable: true,
+
+  addAttributes() {
+    return {
+      footnoteId: {
+        default: null,
+        parseHTML: (element) => element.querySelector('a').getAttribute('id'),
+      },
+      footnoteNumber: {
+        default: null,
+        parseHTML: (element) => element.textContent,
+      },
+    };
+  },
+
+  parseHTML() {
+    return [{ tag: 'sup.footnote-ref', priority: PARSE_HTML_PRIORITY_HIGHEST }];
+  },
+
+  renderHTML({ HTMLAttributes: { footnoteNumber, footnoteId, ...HTMLAttributes } }) {
+    return ['sup', mergeAttributes(HTMLAttributes), footnoteNumber];
+  },
+});
diff --git a/app/assets/javascripts/content_editor/extensions/footnotes_section.js b/app/assets/javascripts/content_editor/extensions/footnotes_section.js
new file mode 100644
index 00000000000..914a8934734
--- /dev/null
+++ b/app/assets/javascripts/content_editor/extensions/footnotes_section.js
@@ -0,0 +1,19 @@
+import { mergeAttributes, Node } from '@tiptap/core';
+
+export default Node.create({
+  name: 'footnotesSection',
+
+  content: 'footnoteDefinition+',
+
+  group: 'block',
+
+  isolating: true,
+
+  parseHTML() {
+    return [{ tag: 'section.footnotes > ol' }];
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return ['ol', mergeAttributes(HTMLAttributes, { class: 'footnotes gl-font-sm' }), 0];
+  },
+});
diff --git a/app/assets/javascripts/content_editor/services/create_content_editor.js b/app/assets/javascripts/content_editor/services/create_content_editor.js
index 385f1c63801..f451357e211 100644
--- a/app/assets/javascripts/content_editor/services/create_content_editor.js
+++ b/app/assets/javascripts/content_editor/services/create_content_editor.js
@@ -19,6 +19,9 @@ import Dropcursor from '../extensions/dropcursor';
 import Emoji from '../extensions/emoji';
 import Figure from '../extensions/figure';
 import FigureCaption from '../extensions/figure_caption';
+import FootnoteDefinition from '../extensions/footnote_definition';
+import FootnoteReference from '../extensions/footnote_reference';
+import FootnotesSection from '../extensions/footnotes_section';
 import Frontmatter from '../extensions/frontmatter';
 import Gapcursor from '../extensions/gapcursor';
 import HardBreak from '../extensions/hard_break';
@@ -94,6 +97,9 @@ export const createContentEditor = ({
     Emoji,
     Figure,
     FigureCaption,
+    FootnoteDefinition,
+    FootnoteReference,
+    FootnotesSection,
     Frontmatter,
     Gapcursor,
     HardBreak,
diff --git a/app/assets/javascripts/content_editor/services/markdown_serializer.js b/app/assets/javascripts/content_editor/services/markdown_serializer.js
index 0dd3cb5b73f..38b0438fa3a 100644
--- a/app/assets/javascripts/content_editor/services/markdown_serializer.js
+++ b/app/assets/javascripts/content_editor/services/markdown_serializer.js
@@ -17,6 +17,9 @@ import Division from '../extensions/division';
 import Emoji from '../extensions/emoji';
 import Figure from '../extensions/figure';
 import FigureCaption from '../extensions/figure_caption';
+import FootnotesSection from '../extensions/footnotes_section';
+import FootnoteDefinition from '../extensions/footnote_definition';
+import FootnoteReference from '../extensions/footnote_reference';
 import Frontmatter from '../extensions/frontmatter';
 import HardBreak from '../extensions/hard_break';
 import Heading from '../extensions/heading';
@@ -156,6 +159,15 @@ const defaultSerializerConfig = {
 
       state.write(`:${name}:`);
     },
+    [FootnoteDefinition.name]: (state, node) => {
+      state.renderInline(node);
+    },
+    [FootnoteReference.name]: (state, node) => {
+      state.write(`[^${node.attrs.footnoteNumber}]`);
+    },
+    [FootnotesSection.name]: (state, node) => {
+      state.renderList(node, '', (index) => `[^${index + 1}]: `);
+    },
     [Frontmatter.name]: (state, node) => {
       const { language } = node.attrs;
       const syntax = {
diff --git a/app/assets/javascripts/ide/components/activity_bar.vue b/app/assets/javascripts/ide/components/activity_bar.vue
index c71d911adfb..846b4d92724 100644
--- a/app/assets/javascripts/ide/components/activity_bar.vue
+++ b/app/assets/javascripts/ide/components/activity_bar.vue
@@ -63,7 +63,7 @@ export default {
           class="ide-sidebar-link js-ide-review-mode"
           @click.prevent="changedActivityView($event, $options.leftSidebarViews.review.name)"
         >
-          <gl-icon name="file-modified" />
+          <gl-icon name="review-list" />
         </button>
       </li>
       <li>
diff --git a/app/assets/javascripts/vue_shared/components/form/input_copy_toggle_visibility.stories.js b/app/assets/javascripts/vue_shared/components/form/input_copy_toggle_visibility.stories.js
new file mode 100644
index 00000000000..cdd7a074f34
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/form/input_copy_toggle_visibility.stories.js
@@ -0,0 +1,27 @@
+import InputCopyToggleVisibility from './input_copy_toggle_visibility.vue';
+
+export default {
+  component: InputCopyToggleVisibility,
+  title: 'vue_shared/components/form/input_copy_toggle_visibility',
+};
+
+const defaultProps = {
+  value: 'hR8x1fuJbzwu5uFKLf9e',
+  formInputGroupProps: { class: 'gl-form-input-xl' },
+};
+
+const Template = (args, { argTypes }) => ({
+  components: { InputCopyToggleVisibility },
+  props: Object.keys(argTypes),
+  template: `<input-copy-toggle-visibility
+      :value="value" 
+      :initial-visibility="initialVisibility"
+      :show-toggle-visibility-button="showToggleVisibilityButton"
+      :show-copy-button="showCopyButton"
+      :form-input-group-props="formInputGroupProps"
+      :copy-button-title="copyButtonTitle"
+    />`,
+});
+
+export const Default = Template.bind({});
+Default.args = defaultProps;
diff --git a/app/assets/javascripts/vue_shared/components/form/input_copy_toggle_visibility.vue b/app/assets/javascripts/vue_shared/components/form/input_copy_toggle_visibility.vue
new file mode 100644
index 00000000000..36e3b46a43c
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/form/input_copy_toggle_visibility.vue
@@ -0,0 +1,124 @@
+<script>
+import { GlFormInputGroup, GlFormGroup, GlButton, GlTooltipDirective } from '@gitlab/ui';
+
+import { __ } from '~/locale';
+import ClipboardButton from '~/vue_shared/components/clipboard_button.vue';
+
+export default {
+  name: 'InputCopyToggleVisibility',
+  i18n: {
+    toggleVisibilityLabelHide: __('Click to hide'),
+    toggleVisibilityLabelReveal: __('Click to reveal'),
+  },
+  components: {
+    GlFormInputGroup,
+    GlFormGroup,
+    GlButton,
+    ClipboardButton,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  props: {
+    value: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    initialVisibility: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    showToggleVisibilityButton: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+    showCopyButton: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+    copyButtonTitle: {
+      type: String,
+      required: false,
+      default: __('Copy'),
+    },
+    formInputGroupProps: {
+      type: Object,
+      required: false,
+      default() {
+        return {};
+      },
+    },
+  },
+  data() {
+    return {
+      valueIsVisible: this.initialVisibility,
+    };
+  },
+  computed: {
+    toggleVisibilityLabel() {
+      return this.valueIsVisible
+        ? this.$options.i18n.toggleVisibilityLabelHide
+        : this.$options.i18n.toggleVisibilityLabelReveal;
+    },
+    toggleVisibilityIcon() {
+      return this.valueIsVisible ? 'eye-slash' : 'eye';
+    },
+    computedValueIsVisible() {
+      return !this.showToggleVisibilityButton || this.valueIsVisible;
+    },
+    displayedValue() {
+      return this.computedValueIsVisible ? this.value : '*'.repeat(this.value.length || 20);
+    },
+  },
+  methods: {
+    handleToggleVisibilityButtonClick() {
+      this.valueIsVisible = !this.valueIsVisible;
+
+      this.$emit('visibility-change', this.valueIsVisible);
+    },
+    handleCopyButtonClick() {
+      this.$emit('copy');
+    },
+    handleFormInputCopy(event) {
+      if (this.computedValueIsVisible) {
+        return;
+      }
+
+      event.clipboardData.setData('text/plain', this.value);
+      event.preventDefault();
+    },
+  },
+};
+</script>
+<template>
+  <gl-form-group v-bind="$attrs">
+    <gl-form-input-group
+      :value="displayedValue"
+      input-class="gl-font-monospace! gl-cursor-default!"
+      select-on-click
+      readonly
+      v-bind="formInputGroupProps"
+      @copy="handleFormInputCopy"
+    >
+      <template v-if="showToggleVisibilityButton || showCopyButton" #append>
+        <gl-button
+          v-if="showToggleVisibilityButton"
+          v-gl-tooltip.hover="toggleVisibilityLabel"
+          :aria-label="toggleVisibilityLabel"
+          :icon="toggleVisibilityIcon"
+          @click="handleToggleVisibilityButtonClick"
+        />
+        <clipboard-button
+          v-if="showCopyButton"
+          :text="value"
+          :title="copyButtonTitle"
+          @click="handleCopyButtonClick"
+        />
+      </template>
+    </gl-form-input-group>
+  </gl-form-group>
+</template>
diff --git a/app/models/ci/build.rb b/app/models/ci/build.rb
index 277e0ccbf23..e0126373864 100644
--- a/app/models/ci/build.rb
+++ b/app/models/ci/build.rb
@@ -1084,16 +1084,6 @@ module Ci
       runner&.instance_type?
     end
 
-    def job_variables_attributes
-      strong_memoize(:job_variables_attributes) do
-        job_variables.map do |variable|
-          variable.attributes.except('id', 'job_id', 'encrypted_value', 'encrypted_value_iv').tap do |attrs|
-            attrs[:value] = variable.value
-          end
-        end
-      end
-    end
-
     protected
 
     def run_status_commit_hooks!
diff --git a/app/services/ci/retry_build_service.rb b/app/services/ci/retry_build_service.rb
index 4b592bbbb40..ebb07de9d29 100644
--- a/app/services/ci/retry_build_service.rb
+++ b/app/services/ci/retry_build_service.rb
@@ -7,7 +7,7 @@ module Ci
          allow_failure stage stage_id stage_idx trigger_request
          yaml_variables when environment coverage_regex
          description tag_list protected needs_attributes
-         resource_group scheduling_type job_variables_attributes].freeze
+         resource_group scheduling_type].freeze
     end
 
     def self.extra_accessors
diff --git a/config/feature_flags/development/drop_detached_partitions.yml b/config/feature_flags/development/drop_detached_partitions.yml
deleted file mode 100644
index b49cf78d28c..00000000000
--- a/config/feature_flags/development/drop_detached_partitions.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: drop_detached_partitions
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67056
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/337155
-milestone: '14.2'
-type: development
-group: group::database
-default_enabled: false
diff --git a/config/feature_flags/development/partition_pruning.yml b/config/feature_flags/development/partition_pruning.yml
deleted file mode 100644
index 02f5dc968a4..00000000000
--- a/config/feature_flags/development/partition_pruning.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: partition_pruning
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67056
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/337153
-milestone: '14.2'
-type: development
-group: group::database
-default_enabled: false
diff --git a/doc/.vale/gitlab/ElementDescriptors.yml b/doc/.vale/gitlab/ElementDescriptors.yml
index 254da16d00c..36f1202aef1 100644
--- a/doc/.vale/gitlab/ElementDescriptors.yml
+++ b/doc/.vale/gitlab/ElementDescriptors.yml
@@ -10,5 +10,4 @@ link: https://docs.gitlab.com/ee/development/documentation/styleguide/index.html
 level: suggestion
 ignorecase: true
 swap:
-  button: 'if possible, rewrite to not use'
-  area: 'use "section" instead of'
+  button: 'if possible, rewrite to remove'
diff --git a/doc/api/job_artifacts.md b/doc/api/job_artifacts.md
index 6d8c256d5aa..7c7847bf368 100644
--- a/doc/api/job_artifacts.md
+++ b/doc/api/job_artifacts.md
@@ -252,6 +252,7 @@ Example response:
   "finished_at": "2016-01-11T10:15:10.506Z",
   "duration": 97.0,
   "status": "failed",
+  "failure_reason": "script_failure",
   "tag": false,
   "web_url": "https://example.com/foo/bar/-/jobs/42",
   "user": null
diff --git a/doc/api/jobs.md b/doc/api/jobs.md
index 2a07e2d92c5..f3971fb5732 100644
--- a/doc/api/jobs.md
+++ b/doc/api/jobs.md
@@ -71,6 +71,7 @@ Example of response
     "runner": null,
     "stage": "test",
     "status": "failed",
+    "failure_reason": "script_failure",
     "tag": false,
     "web_url": "https://example.com/foo/bar/-/jobs/7",
     "user": {
@@ -126,6 +127,7 @@ Example of response
     "runner": null,
     "stage": "test",
     "status": "failed",
+    "failure_reason": "stuck_or_timeout_failure",
     "tag": false,
     "web_url": "https://example.com/foo/bar/-/jobs/6",
     "user": {
@@ -207,6 +209,7 @@ Example of response
     "runner": null,
     "stage": "test",
     "status": "failed",
+    "failure_reason": "stuck_or_timeout_failure",
     "tag": false,
     "web_url": "https://example.com/foo/bar/-/jobs/6",
     "user": {
@@ -271,6 +274,7 @@ Example of response
     "runner": null,
     "stage": "test",
     "status": "failed",
+    "failure_reason": "script_failure",
     "tag": false,
     "web_url": "https://example.com/foo/bar/-/jobs/7",
     "user": {
@@ -443,6 +447,7 @@ Example of response
   "runner": null,
   "stage": "test",
   "status": "failed",
+  "failure_reason": "script_failure",
   "tag": false,
   "web_url": "https://example.com/foo/bar/-/jobs/8",
   "user": {
diff --git a/doc/api/status_checks.md b/doc/api/status_checks.md
index 0c72ee37348..c0dba71bdc5 100644
--- a/doc/api/status_checks.md
+++ b/doc/api/status_checks.md
@@ -145,6 +145,6 @@ PUT /projects/:id/external_status_checks/:check_id
 | `external_url`         | string           | no       | URL of external status check resource          |
 | `protected_branch_ids` | `array<Integer>` | no       | IDs of protected branches to scope the rule by |
 
-## Related links
+## Related topics
 
 - [External status checks](../user/project/merge_requests/status_checks.md).
diff --git a/doc/api/v3_to_v4.md b/doc/api/v3_to_v4.md
index 3fba95c1fb3..da269073905 100644
--- a/doc/api/v3_to_v4.md
+++ b/doc/api/v3_to_v4.md
@@ -11,7 +11,7 @@ The GitLab API v3 was [removed](https://gitlab.com/gitlab-org/gitlab-foss/-/issu
 
 For information about the current version of the GitLab API, read the [API documentation](index.md).
 
-## Related links
+## Related topics
 
 - [GitLab v3 API documentation](https://gitlab.com/gitlab-org/gitlab-foss/-/blob/8-16-stable/doc/api/index.md)
 - [Migration guide](https://gitlab.com/gitlab-org/gitlab-foss/-/blob/11-0-stable/doc/api/v3_to_v4.md) from
diff --git a/doc/ci/yaml/index.md b/doc/ci/yaml/index.md
index 83b627e08f7..704ae1b6ef4 100644
--- a/doc/ci/yaml/index.md
+++ b/doc/ci/yaml/index.md
@@ -199,8 +199,10 @@ use `include:file`. You can use `include:file` in combination with `include:proj
 
 **Keyword type**: Global keyword.
 
-**Possible inputs**: A full path, relative to the root directory (`/`).
-The YAML file must have the extension `.yml` or `.yaml`.
+**Possible inputs**:
+
+- A full path, relative to the root directory (`/`). The YAML file must have the
+  extension `.yml` or `.yaml`.
 
 **Example of `include:file`**:
 
@@ -255,10 +257,10 @@ Use `include:remote` with a full URL to include a file from a different location
 
 **Keyword type**: Global keyword.
 
-**Possible inputs**: A public URL accessible by an HTTP/HTTPS `GET` request.
-Authentication with the remote URL is not supported.
+**Possible inputs**:
 
-The YAML file must have the extension `.yml` or `.yaml`.
+- A public URL accessible by an HTTP/HTTPS `GET` request. Authentication with the
+  remote URL is not supported. The YAML file must have the extension `.yml` or `.yaml`.
 
 **Example of `include:remote`**:
 
@@ -281,7 +283,9 @@ Use `include:template` to include [`.gitlab-ci.yml` templates](https://gitlab.co
 
 **Keyword type**: Global keyword.
 
-**Possible inputs**: [`.gitlab-ci.yml` templates](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/ci/templates).
+**Possible inputs**:
+
+- [`.gitlab-ci.yml` templates](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/ci/templates).
 
 **Example of `include:template`**:
 
@@ -556,7 +560,9 @@ The default value for `allow_failure` is:
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: `true` or `false`.
+**Possible inputs**:
+
+- `true` or `false`.
 
 **Example of `allow_failure`**:
 
@@ -894,7 +900,9 @@ included templates in jobs.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: See list of available [artifacts reports types](artifacts_reports.md).
+**Possible inputs**:
+
+- See list of available [artifacts reports types](artifacts_reports.md).
 
 **Example of `artifacts:reports`**:
 
@@ -1024,14 +1032,15 @@ Use the `cache:paths` keyword to choose which files or directories to cache.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: An array of paths relative to the project directory (`$CI_PROJECT_DIR`).
-You can use wildcards that use [glob](https://en.wikipedia.org/wiki/Glob_(programming))
-patterns:
+**Possible inputs**:
 
-- In [GitLab Runner 13.0 and later](https://gitlab.com/gitlab-org/gitlab-runner/-/issues/2620),
-[`doublestar.Glob`](https://pkg.go.dev/github.com/bmatcuk/doublestar@v1.2.2?tab=doc#Match).
-- In GitLab Runner 12.10 and earlier,
-[`filepath.Match`](https://pkg.go.dev/path/filepath#Match).
+- An array of paths relative to the project directory (`$CI_PROJECT_DIR`).
+  You can use wildcards that use [glob](https://en.wikipedia.org/wiki/Glob_(programming))
+  patterns:
+  - In [GitLab Runner 13.0 and later](https://gitlab.com/gitlab-org/gitlab-runner/-/issues/2620),
+  [`doublestar.Glob`](https://pkg.go.dev/github.com/bmatcuk/doublestar@v1.2.2?tab=doc#Match).
+  - In GitLab Runner 12.10 and earlier,
+  [`filepath.Match`](https://pkg.go.dev/path/filepath#Match).
 
 **Example of `cache:paths`**:
 
@@ -1114,7 +1123,9 @@ which speeds up subsequent pipeline runs.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: An array of one or two file paths.
+**Possible inputs**:
+
+- An array of one or two file paths.
 
 **Example of `cache:key:files`**:
 
@@ -1190,7 +1201,9 @@ Use `untracked: true` to cache all files that are untracked in your Git reposito
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: `true` or `false` (default).
+**Possible inputs**:
+
+- `true` or `false` (default).
 
 **Example of `cache:untracked`**:
 
@@ -1303,7 +1316,9 @@ line in the job output matches the regular expression.
 To extract the code coverage value in the matching line, GitLab uses this
 regular expression: `\d+(\.\d+)?`.
 
-**Possible inputs**: A regular expression. Must start and end with `/`.
+**Possible inputs**:
+
+- A regular expression. Must start and end with `/`.
 
 **Example of `coverage`**:
 
@@ -1811,7 +1826,9 @@ where each shell token is a separate string in the array.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: A string.
+**Possible inputs**:
+
+- A string.
 
 **Example of `image:entrypoint`**:
 
@@ -1918,7 +1935,9 @@ You can't cancel subsequent jobs after a job with `interruptible: false` starts.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: `true` or `false` (default).
+**Possible inputs**:
+
+- `true` or `false` (default).
 
 **Example of `interruptible`**:
 
@@ -2411,7 +2430,9 @@ to a pipeline, based on the status of [CI/CD variables](../variables/index.md).
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: An array of [CI/CD variable expressions](../jobs/job_control.md#cicd-variable-expressions).
+**Possible inputs**:
+
+- An array of [CI/CD variable expressions](../jobs/job_control.md#cicd-variable-expressions).
 
 **Example of `only:variables`**:
 
@@ -2490,7 +2511,9 @@ when the Kubernetes service is active in the project.
 
 **Keyword type**: Job-specific. You can use it only as part of a job.
 
-**Possible inputs**: The `kubernetes` strategy accepts only the `active` keyword.
+**Possible inputs**:
+
+- The `kubernetes` strategy accepts only the `active` keyword.
 
 **Example of `only:kubernetes`**:
 
@@ -2546,7 +2569,9 @@ Parallel jobs are named sequentially from `job_name 1/N` to `job_name N/N`.
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: A numeric value from `2` to `50`.
+**Possible inputs**:
+
+- A numeric value from `2` to `50`.
 
 **Example of `parallel`**:
 
@@ -2579,7 +2604,9 @@ Multiple runners must exist, or a single runner must be configured to run multip
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: A numeric value from `2` to `50`.
+**Possible inputs**:
+
+- A numeric value from `2` to `50`.
 
 **Example of `parallel:matrix`**:
 
@@ -2699,7 +2726,9 @@ New tags use the SHA associated with the pipeline.
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: A tag name. Can use [CI/CD variables](../variables/index.md).
+**Possible inputs**:
+
+- A tag name. Can use [CI/CD variables](../variables/index.md).
 
 **Example of `release:tag_name`**:
 
@@ -2738,7 +2767,9 @@ The release name. If omitted, it is populated with the value of `release: tag_na
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: A text string.
+**Possible inputs**:
+
+- A text string.
 
 **Example of `release:name`**:
 
@@ -2843,8 +2874,10 @@ can be deployed to, but only one deployment can occur per device at any given ti
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: Only letters, digits, `-`, `_`, `/`, `$`, `{`, `}`, `.`, and spaces.
-It can't start or end with `/`.
+**Possible inputs**:
+
+- Only letters, digits, `-`, `_`, `/`, `$`, `{`, `}`, `.`, and spaces.
+  It can't start or end with `/`.
 
 **Example of `resource_group`**:
 
@@ -2875,7 +2908,9 @@ to select which failures to retry on.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: `0` (default), `1`, or `2`.
+**Possible inputs**:
+
+- `0` (default), `1`, or `2`.
 
 **Example of `retry`**:
 
@@ -2894,7 +2929,9 @@ Use `retry:when` with `retry:max` to retry jobs for only specific failure cases.
 **Keyword type**: Job keyword. You can use it only as part of a job or in the
 [`default` section](#default).
 
-**Possible inputs**: A single failure type, or an array of one or more failure types:
+**Possible inputs**:
+
+- A single failure type, or an array of one or more failure types:
 
 <!--
   If you change any of the values below, make sure to update the `RETRY_WHEN_IN_DOCUMENTATION`
@@ -3002,7 +3039,9 @@ or [custom CI/CD variables](../variables/index.md#custom-cicd-variables).
 **Keyword type**: Job-specific and pipeline-specific. You can use it as part of a job
 to configure the job behavior, or with [`workflow`](#workflow) to configure the pipeline behavior.
 
-**Possible inputs**: A [CI/CD variable expression](../jobs/job_control.md#cicd-variable-expressions).
+**Possible inputs**:
+
+- A [CI/CD variable expression](../jobs/job_control.md#cicd-variable-expressions).
 
 **Example of `rules:if`**:
 
@@ -3048,8 +3087,9 @@ branch or merge request pipelines.
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: An array of file paths. In GitLab 13.6 and later,
-[file paths can include variables](../jobs/job_control.md#variables-in-ruleschanges).
+**Possible inputs**:
+
+- An array of file paths. In GitLab 13.6 and later, [file paths can include variables](../jobs/job_control.md#variables-in-ruleschanges).
 
 **Example of `rules:changes`**:
 
@@ -3083,8 +3123,10 @@ Use `exists` to run a job when certain files exist in the repository.
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: An array of file paths. Paths are relative to the project directory (`$CI_PROJECT_DIR`)
-and can't directly link outside it. File paths can use glob patterns.
+**Possible inputs**:
+
+- An array of file paths. Paths are relative to the project directory (`$CI_PROJECT_DIR`)
+  and can't directly link outside it. File paths can use glob patterns.
 
 **Example of `rules:exists`**:
 
@@ -3122,7 +3164,9 @@ job to run before continuing.
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: `true` or `false`. Defaults to `false` if not defined.
+**Possible inputs**:
+
+- `true` or `false`. Defaults to `false` if not defined.
 
 **Example of `rules:allow_failure`**:
 
@@ -3151,7 +3195,9 @@ Use [`variables`](#variables) in `rules` to define variables for specific condit
 
 **Keyword type**: Job-specific. You can use it only as part of a job.
 
-**Possible inputs**: A hash of variables in the format `VARIABLE-NAME: value`.
+**Possible inputs**:
+
+- A hash of variables in the format `VARIABLE-NAME: value`.
 
 **Example of `rules:variables`**:
 
@@ -3286,7 +3332,9 @@ the secret value directly in the variable.
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: `true` (default) or `false`.
+**Possible inputs**:
+
+- `true` (default) or `false`.
 
 **Example of `secrets:file`**:
 
@@ -3552,7 +3600,7 @@ Use `trigger` to start a downstream pipeline that is either:
 
 **Keyword type**: Job keyword. You can use it only as part of a job.
 
-**Possible inputs**: 
+**Possible inputs**:
 
 - For multi-project pipelines, path to the downstream project.
 - For child pipelines, path to the child pipeline CI/CD configuration file.
@@ -3682,7 +3730,9 @@ Must be used with `value`, for the variable value.
 
 **Keyword type**: Global keyword. You cannot set job-level variables to be pre-filled when you run a pipeline manually.
 
-**Possible inputs**: A string.
+**Possible inputs**:
+
+- A string.
 
 **Example of `variables:description`**:
 
diff --git a/doc/development/database/multiple_databases.md b/doc/development/database/multiple_databases.md
index 661f0f46d9f..6dce3217b24 100644
--- a/doc/development/database/multiple_databases.md
+++ b/doc/development/database/multiple_databases.md
@@ -134,7 +134,7 @@ After configuring GitLab for the two databases, create the new CI/CD database:
    and run any pending migrations:
 
     ```shell
-    bundle exec rails rails db:create db:schema:load:ci db:migrate
+    bundle exec rails db:create db:schema:load:ci db:migrate
     ```
 
 1. Restart GDK:
diff --git a/doc/development/pipelines.md b/doc/development/pipelines.md
index a813502db51..36a5301de65 100644
--- a/doc/development/pipelines.md
+++ b/doc/development/pipelines.md
@@ -220,6 +220,20 @@ The `* as-if-jh` jobs are run in addition to the regular EE-context jobs. The `j
 The intent is to ensure that a change doesn't introduce a failure after the `gitlab-org/gitlab` project is synced to
 the `gitlab-jh/gitlab` project.
 
+## `undercover` RSpec test
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/74859) in GitLab 14.6.
+
+The `rspec:undercoverage` job runs [`undercover`](https://rubygems.org/gems/undercover)
+to detect, and fail if any changes introduced in the merge request has zero coverage.
+
+The `rsepc:undercoverage` job obtains coverage data from the `rspec:coverage`
+job.
+
+In the event of an emergency, or false positive from this job, add the
+`pipeline:skip-undercoverage` label to the merge request to allow this job to
+fail.
+
 ## PostgreSQL versions testing
 
 Our test suite runs against PG12 as GitLab.com runs on PG12 and
diff --git a/doc/integration/datadog.md b/doc/integration/datadog.md
index 687be5adcf7..1c699bb622e 100644
--- a/doc/integration/datadog.md
+++ b/doc/integration/datadog.md
@@ -46,6 +46,6 @@ project, group, or instance level:
 When the integration sends data, you can view it in the [CI Visibility](https://app.datadoghq.com/ci)
 section of your Datadog account.
 
-## Related links
+## Related topics
 
 - [Datadog's CI Visibility](https://docs.datadoghq.com/continuous_integration/) documentation.
diff --git a/doc/topics/git/cherry_picking.md b/doc/topics/git/cherry_picking.md
index 64d1914019d..98458133937 100644
--- a/doc/topics/git/cherry_picking.md
+++ b/doc/topics/git/cherry_picking.md
@@ -74,7 +74,7 @@ into a different branch (`stable`):
    git cherry-pick <SHA>
    ```
 
-## Related links
+## Related topics
 
 - Cherry-pick commits with [the Commits API](../../api/commits.md#cherry-pick-a-commit)
 - Git documentation [for cherry-picks](https://git-scm.com/docs/git-cherry-pick)
diff --git a/doc/user/project/issues/confidential_issues.md b/doc/user/project/issues/confidential_issues.md
index b8a01f7ccd6..0fc32619f85 100644
--- a/doc/user/project/issues/confidential_issues.md
+++ b/doc/user/project/issues/confidential_issues.md
@@ -88,7 +88,7 @@ sees in the project's search results respectively.
 |:---------------------------------------------------------------------------------------|:---------------------------------------------------------------------------------|
 | ![Confidential issues search by maintainer](img/confidential_issues_search_master.png) | ![Confidential issues search by guest](img/confidential_issues_search_guest.png) |
 
-## Related links
+## Related topics
 
 - [Merge requests for confidential issues](../merge_requests/confidential.md)
 - [Make an epic confidential](../../group/epics/manage_epics.md#make-an-epic-confidential)
diff --git a/doc/user/project/merge_requests/approvals/index.md b/doc/user/project/merge_requests/approvals/index.md
index d873f715557..dddd3925dbb 100644
--- a/doc/user/project/merge_requests/approvals/index.md
+++ b/doc/user/project/merge_requests/approvals/index.md
@@ -105,7 +105,7 @@ Without the approvals, the work cannot merge. Required approvals enable multiple
 - [Require approval from a security team](../../../application_security/index.md#security-approvals-in-merge-requests)
   before merging code that could introduce a vulnerability. **(ULTIMATE)**
 
-## Related links
+## Related topics
 
 - [Merge request approvals API](../../../../api/merge_request_approvals.md)
 - [Instance-level approval rules](../../../admin_area/merge_requests_approvals.md) for self-managed installations
diff --git a/doc/user/project/merge_requests/approvals/settings.md b/doc/user/project/merge_requests/approvals/settings.md
index 56e93741c1a..a6ca9423df0 100644
--- a/doc/user/project/merge_requests/approvals/settings.md
+++ b/doc/user/project/merge_requests/approvals/settings.md
@@ -157,7 +157,7 @@ You can also enforce merge request approval settings:
 If the settings are inherited by a group or project, they cannot be changed in the group or project
 that inherited them.
 
-## Related links
+## Related topics
 
 - [Instance-level merge request approval settings](../../../admin_area/merge_requests_approvals.md)
 - [Compliance report](../../../compliance/compliance_report/index.md)
diff --git a/doc/user/project/merge_requests/cherry_pick_changes.md b/doc/user/project/merge_requests/cherry_pick_changes.md
index 4a2319774ac..54e411fa9c9 100644
--- a/doc/user/project/merge_requests/cherry_pick_changes.md
+++ b/doc/user/project/merge_requests/cherry_pick_changes.md
@@ -79,7 +79,7 @@ merge request is from a fork:
 1. (Optional) Select **Start a new merge request** if you're ready to create a merge request.
 1. Click **Cherry-pick**.
 
-## Related links
+## Related topics
 
 - The [Commits API](../../../api/commits.md) enables you to add custom messages
   to changes you cherry-pick through the API.
diff --git a/doc/user/project/merge_requests/confidential.md b/doc/user/project/merge_requests/confidential.md
index ff2e6acf123..10c63421876 100644
--- a/doc/user/project/merge_requests/confidential.md
+++ b/doc/user/project/merge_requests/confidential.md
@@ -70,7 +70,7 @@ Open a merge request
 - You are satisfied the problem is resolved in your private fork.
 - You are ready to make the confidential commits public.
 
-## Related links
+## Related topics
 
 - [Confidential issues](../issues/confidential_issues.md)
 - [Make an epic confidential](../../group/epics/manage_epics.md#make-an-epic-confidential)
diff --git a/doc/user/project/merge_requests/reviews/suggestions.md b/doc/user/project/merge_requests/reviews/suggestions.md
index 7bfb8e52279..c25b9e15974 100644
--- a/doc/user/project/merge_requests/reviews/suggestions.md
+++ b/doc/user/project/merge_requests/reviews/suggestions.md
@@ -144,6 +144,6 @@ to your branch to address your reviewers' requests.
 WARNING:
 Suggestions applied from multiple authors creates a commit authored by the user applying the suggestions.
 
-## Related links
+## Related topics
 
 - [Suggestions API](../../../../api/suggestions.md)
diff --git a/doc/user/project/merge_requests/status_checks.md b/doc/user/project/merge_requests/status_checks.md
index 08b82462187..f5ebfb3668c 100644
--- a/doc/user/project/merge_requests/status_checks.md
+++ b/doc/user/project/merge_requests/status_checks.md
@@ -181,6 +181,6 @@ You should:
 - Check the [GitLab status page](https://status.gitlab.com/) if the problem persists,
   to see if there is a wider outage.
 
-## Related links
+## Related topics
 
 - [External status checks API](../../../api/status_checks.md)
diff --git a/doc/user/project/repository/index.md b/doc/user/project/repository/index.md
index bb1a55f6b2b..54e9470892c 100644
--- a/doc/user/project/repository/index.md
+++ b/doc/user/project/repository/index.md
@@ -248,9 +248,19 @@ When you [rename a user](../../profile/index.md#change-your-username),
 - The redirects are available as long as the original path is not claimed by
   another group, user, or project.
 
-## Related links
+## Related topics
 
-- [GitLab Workflow VS Code extension](vscode.md)
+- [GitLab Workflow VS Code extension](vscode.md).
+- To lock files and prevent change conflicts, use [file locking](../file_lock.md).
+- [Repository API](../../../api/repositories.md).
+- [Find files](file_finder.md) in a repository.
+- [Branches](branches/index.md).
+- [File templates](web_editor.md#template-dropdowns).
+- [Create a directory](web_editor.md#create-a-directory).
+- [Start a merge request](web_editor.md#tips).
+- [Find file history](git_history.md).
+- [Identify changes by line (Git blame)](git_blame.md).
+- [Use Jupyter notebooks with GitLab](jupyter_notebooks/index.md).
 
 ## Troubleshooting
 
@@ -287,16 +297,3 @@ The same approach should also allow misidentified file types to be fixed.
    ```
 
   `*.txt` files have an entry in the heuristics file. This example prevents parsing of these files.
-
-## Related topics
-
-- To lock files and prevent change conflicts, use [file locking](../file_lock.md).
-- [Repository API](../../../api/repositories.md).
-- [Find files](file_finder.md) in a repository.
-- [Branches](branches/index.md).
-- [File templates](web_editor.md#template-dropdowns).
-- [Create a directory](web_editor.md#create-a-directory).
-- [Start a merge request](web_editor.md#tips).
-- [Find file history](git_history.md).
-- [Identify changes by line (Git blame)](git_blame.md).
-- [Use Jupyter notebooks with GitLab](jupyter_notebooks/index.md).
diff --git a/doc/user/project/time_tracking.md b/doc/user/project/time_tracking.md
index 8902bdc21c4..b41ea30bfef 100644
--- a/doc/user/project/time_tracking.md
+++ b/doc/user/project/time_tracking.md
@@ -123,7 +123,7 @@ To do so:
 
 With this option enabled, `75h` is displayed instead of `1w 4d 3h`.
 
-## Related links
+## Related topics
 
 - [Time tracking solutions page](https://about.gitlab.com/solutions/time-tracking/)
 - Time tracking GraphQL references:
diff --git a/lib/api/entities/ci/job_basic.rb b/lib/api/entities/ci/job_basic.rb
index c31340f1ff0..0badde4089e 100644
--- a/lib/api/entities/ci/job_basic.rb
+++ b/lib/api/entities/ci/job_basic.rb
@@ -13,6 +13,7 @@ module API
         expose :user, with: ::API::Entities::User
         expose :commit, with: ::API::Entities::Commit
         expose :pipeline, with: ::API::Entities::Ci::PipelineBasic
+        expose :failure_reason, if: -> (job) { job.failed? }
 
         expose :web_url do |job, _options|
           Gitlab::Routing.url_helpers.project_job_url(job.project, job)
diff --git a/lib/gitlab/database/partitioning/detached_partition_dropper.rb b/lib/gitlab/database/partitioning/detached_partition_dropper.rb
index 593824384b5..5e32ecad4ca 100644
--- a/lib/gitlab/database/partitioning/detached_partition_dropper.rb
+++ b/lib/gitlab/database/partitioning/detached_partition_dropper.rb
@@ -4,8 +4,6 @@ module Gitlab
     module Partitioning
       class DetachedPartitionDropper
         def perform
-          return unless Feature.enabled?(:drop_detached_partitions, default_enabled: :yaml)
-
           Gitlab::AppLogger.info(message: "Checking for previously detached partitions to drop")
 
           Postgresql::DetachedPartition.ready_to_drop.find_each do |detached_partition|
diff --git a/lib/gitlab/database/partitioning/partition_manager.rb b/lib/gitlab/database/partitioning/partition_manager.rb
index d810ae63c5a..aa824dfbd2f 100644
--- a/lib/gitlab/database/partitioning/partition_manager.rb
+++ b/lib/gitlab/database/partitioning/partition_manager.rb
@@ -25,10 +25,8 @@ module Gitlab
             partitions_to_create = missing_partitions
             create(partitions_to_create) unless partitions_to_create.empty?
 
-            if Feature.enabled?(:partition_pruning, default_enabled: :yaml)
-              partitions_to_detach = extra_partitions
-              detach(partitions_to_detach) unless partitions_to_detach.empty?
-            end
+            partitions_to_detach = extra_partitions
+            detach(partitions_to_detach) unless partitions_to_detach.empty?
           end
         rescue StandardError => e
           Gitlab::AppLogger.error(message: "Failed to create / detach partition(s)",
diff --git a/qa/qa/resource/runner.rb b/qa/qa/resource/runner.rb
index 3c448816100..e69702a8ffa 100644
--- a/qa/qa/resource/runner.rb
+++ b/qa/qa/resource/runner.rb
@@ -19,7 +19,7 @@ module QA
       end
 
       def image
-        @image || 'gitlab/gitlab-runner:alpine'
+        @image || 'registry.gitlab.com/gitlab-org/gitlab-runner:alpine'
       end
 
       def executor
diff --git a/scripts/undercoverage b/scripts/undercoverage
new file mode 100755
index 00000000000..cc7415d67ac
--- /dev/null
+++ b/scripts/undercoverage
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+bundle exec undercover -c "${CI_MERGE_REQUEST_DIFF_BASE_SHA:-$(git merge-base origin/master HEAD)}"
diff --git a/spec/fixtures/markdown/markdown_golden_master_examples.yml b/spec/fixtures/markdown/markdown_golden_master_examples.yml
index d0ccf46f69c..13af419d309 100644
--- a/spec/fixtures/markdown/markdown_golden_master_examples.yml
+++ b/spec/fixtures/markdown/markdown_golden_master_examples.yml
@@ -429,6 +429,38 @@
     </figcaption>
     </figure>
 
+- name: footnotes
+  substitutions:
+    # NOTE: We don't care about verifying specific attribute values here, that should be the
+    #       responsibility of unit tests. These tests are about the structure of the HTML.
+    fn_href_substitution:
+      - regex: '(href)(=")(.+?)(")'
+        replacement: '\1\2REF\4'
+    footnote_id_substitution:
+      - regex: '(id)(=")(.+?)(")'
+        replacement: '\1\2ID\4'
+
+  pending:
+    backend: https://gitlab.com/gitlab-org/gitlab/-/issues/346591
+  markdown: |-
+    A footnote reference tag looks like this: [^1]
+
+    This reference tag is a mix of letters and numbers. [^2]
+
+    [^1]: This is the text inside a footnote.
+    [^2]: This is another footnote.
+  html: |-
+    <p data-sourcepos="1:1-1:46" dir="auto">A footnote reference tag looks like this: <sup class="footnote-ref"><a href="#fn-1-2717" id="fnref-1-2717" data-footnote-ref="">1</a></sup></p>
+    <p data-sourcepos="3:1-3:56" dir="auto">This reference tag is a mix of letters and numbers. <sup class="footnote-ref"><a href="#fn-2-2717" id="fnref-2-2717" data-footnote-ref="">2</a></sup></p>
+    <section class="footnotes" data-footnotes><ol>
+    <li id="fn-1-2717">
+    <p data-sourcepos="5:7-5:41">This is the text inside a footnote. <a href="#fnref-1-2717" aria-label="Back to content" class="footnote-backref" data-footnote-backref=""><gl-emoji title="leftwards arrow with hook" data-name="leftwards_arrow_with_hook" data-unicode-version="1.1">↩</gl-emoji></a></p>
+    </li>
+    <li id="fn-2-2717">
+    <p data-sourcepos="6:7-6:31">This is another footnote. <a href="#fnref-2-2717" aria-label="Back to content" class="footnote-backref" data-footnote-backref=""><gl-emoji title="leftwards arrow with hook" data-name="leftwards_arrow_with_hook" data-unicode-version="1.1">↩</gl-emoji></a></p>
+    </li>
+    </ol></section>
+
 - name: frontmatter_json
   markdown: |-
     ;;;
diff --git a/spec/frontend/content_editor/services/markdown_serializer_spec.js b/spec/frontend/content_editor/services/markdown_serializer_spec.js
index c41d9016e52..97f6d8f6334 100644
--- a/spec/frontend/content_editor/services/markdown_serializer_spec.js
+++ b/spec/frontend/content_editor/services/markdown_serializer_spec.js
@@ -11,6 +11,9 @@ import Division from '~/content_editor/extensions/division';
 import Emoji from '~/content_editor/extensions/emoji';
 import Figure from '~/content_editor/extensions/figure';
 import FigureCaption from '~/content_editor/extensions/figure_caption';
+import FootnoteDefinition from '~/content_editor/extensions/footnote_definition';
+import FootnoteReference from '~/content_editor/extensions/footnote_reference';
+import FootnotesSection from '~/content_editor/extensions/footnotes_section';
 import HardBreak from '~/content_editor/extensions/hard_break';
 import Heading from '~/content_editor/extensions/heading';
 import HorizontalRule from '~/content_editor/extensions/horizontal_rule';
@@ -46,6 +49,9 @@ const tiptapEditor = createTestEditor({
     DetailsContent,
     Division,
     Emoji,
+    FootnoteDefinition,
+    FootnoteReference,
+    FootnotesSection,
     Figure,
     FigureCaption,
     HardBreak,
@@ -81,6 +87,9 @@ const {
     descriptionItem,
     descriptionList,
     emoji,
+    footnoteDefinition,
+    footnoteReference,
+    footnotesSection,
     figure,
     figureCaption,
     heading,
@@ -117,6 +126,9 @@ const {
     emoji: { markType: Emoji.name },
     figure: { nodeType: Figure.name },
     figureCaption: { nodeType: FigureCaption.name },
+    footnoteDefinition: { nodeType: FootnoteDefinition.name },
+    footnoteReference: { nodeType: FootnoteReference.name },
+    footnotesSection: { nodeType: FootnotesSection.name },
     hardBreak: { nodeType: HardBreak.name },
     heading: { nodeType: Heading.name },
     horizontalRule: { nodeType: HorizontalRule.name },
@@ -1105,4 +1117,22 @@ there
       `.trim(),
     );
   });
+
+  it('correctly serializes footnotes', () => {
+    expect(
+      serialize(
+        paragraph(
+          'Oranges are orange ',
+          footnoteReference({ footnoteId: '1', footnoteNumber: '1' }),
+        ),
+        footnotesSection(footnoteDefinition(paragraph('Oranges are fruits'))),
+      ),
+    ).toBe(
+      `
+Oranges are orange [^1]
+
+[^1]: Oranges are fruits
+      `.trim(),
+    );
+  });
 });
diff --git a/spec/frontend/vue_shared/components/form/input_copy_toggle_visibility_spec.js b/spec/frontend/vue_shared/components/form/input_copy_toggle_visibility_spec.js
new file mode 100644
index 00000000000..4b54d298973
--- /dev/null
+++ b/spec/frontend/vue_shared/components/form/input_copy_toggle_visibility_spec.js
@@ -0,0 +1,220 @@
+import { merge } from 'lodash';
+import { GlFormInputGroup } from '@gitlab/ui';
+
+import InputCopyToggleVisibility from '~/vue_shared/components/form/input_copy_toggle_visibility.vue';
+import ClipboardButton from '~/vue_shared/components/clipboard_button.vue';
+import { createMockDirective, getBinding } from 'helpers/vue_mock_directive';
+
+import { mountExtended } from 'helpers/vue_test_utils_helper';
+
+describe('InputCopyToggleVisibility', () => {
+  let wrapper;
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  const valueProp = 'hR8x1fuJbzwu5uFKLf9e';
+
+  const createComponent = (options = {}) => {
+    wrapper = mountExtended(
+      InputCopyToggleVisibility,
+      merge({}, options, {
+        directives: {
+          GlTooltip: createMockDirective(),
+        },
+      }),
+    );
+  };
+
+  const findFormInputGroup = () => wrapper.findComponent(GlFormInputGroup);
+  const findFormInput = () => findFormInputGroup().find('input');
+  const findRevealButton = () =>
+    wrapper.findByRole('button', {
+      name: InputCopyToggleVisibility.i18n.toggleVisibilityLabelReveal,
+    });
+  const findHideButton = () =>
+    wrapper.findByRole('button', {
+      name: InputCopyToggleVisibility.i18n.toggleVisibilityLabelHide,
+    });
+  const findCopyButton = () => wrapper.findComponent(ClipboardButton);
+  const createCopyEvent = () => {
+    const event = new Event('copy', { cancelable: true });
+    Object.assign(event, { preventDefault: jest.fn(), clipboardData: { setData: jest.fn() } });
+
+    return event;
+  };
+
+  const itDoesNotModifyCopyEvent = () => {
+    it('does not modify copy event', () => {
+      const event = createCopyEvent();
+
+      findFormInput().element.dispatchEvent(event);
+
+      expect(event.clipboardData.setData).not.toHaveBeenCalled();
+      expect(event.preventDefault).not.toHaveBeenCalled();
+    });
+  };
+
+  describe('when `value` prop is passed', () => {
+    beforeEach(() => {
+      createComponent({
+        propsData: {
+          value: valueProp,
+        },
+      });
+    });
+
+    it('displays value as hidden', () => {
+      expect(findFormInputGroup().props('value')).toBe('********************');
+    });
+
+    it('saves actual value to clipboard when manually copied', () => {
+      const event = createCopyEvent();
+      findFormInput().element.dispatchEvent(event);
+
+      expect(event.clipboardData.setData).toHaveBeenCalledWith('text/plain', valueProp);
+      expect(event.preventDefault).toHaveBeenCalled();
+    });
+
+    describe('visibility toggle button', () => {
+      it('renders a reveal button', () => {
+        const revealButton = findRevealButton();
+
+        expect(revealButton.exists()).toBe(true);
+
+        const tooltip = getBinding(revealButton.element, 'gl-tooltip');
+
+        expect(tooltip.value).toBe(InputCopyToggleVisibility.i18n.toggleVisibilityLabelReveal);
+      });
+
+      describe('when clicked', () => {
+        beforeEach(async () => {
+          await findRevealButton().trigger('click');
+        });
+
+        it('displays value', () => {
+          expect(findFormInputGroup().props('value')).toBe(valueProp);
+        });
+
+        it('renders a hide button', () => {
+          const hideButton = findHideButton();
+
+          expect(hideButton.exists()).toBe(true);
+
+          const tooltip = getBinding(hideButton.element, 'gl-tooltip');
+
+          expect(tooltip.value).toBe(InputCopyToggleVisibility.i18n.toggleVisibilityLabelHide);
+        });
+
+        it('emits `visibility-change` event', () => {
+          expect(wrapper.emitted('visibility-change')[0]).toEqual([true]);
+        });
+      });
+    });
+
+    describe('copy button', () => {
+      it('renders button with correct props passed', () => {
+        expect(findCopyButton().props()).toMatchObject({
+          text: valueProp,
+          title: 'Copy',
+        });
+      });
+
+      describe('when clicked', () => {
+        beforeEach(async () => {
+          await findCopyButton().trigger('click');
+        });
+
+        it('emits `copy` event', () => {
+          expect(wrapper.emitted('copy')[0]).toEqual([]);
+        });
+      });
+    });
+  });
+
+  describe('when `value` prop is not passed', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('displays value as hidden with 20 asterisks', () => {
+      expect(findFormInputGroup().props('value')).toBe('********************');
+    });
+  });
+
+  describe('when `initialVisibility` prop is `true`', () => {
+    beforeEach(() => {
+      createComponent({
+        propsData: {
+          value: valueProp,
+          initialVisibility: true,
+        },
+      });
+    });
+
+    it('displays value', () => {
+      expect(findFormInputGroup().props('value')).toBe(valueProp);
+    });
+
+    itDoesNotModifyCopyEvent();
+  });
+
+  describe('when `showToggleVisibilityButton` is `false`', () => {
+    beforeEach(() => {
+      createComponent({
+        propsData: {
+          value: valueProp,
+          showToggleVisibilityButton: false,
+        },
+      });
+    });
+
+    it('does not render visibility toggle button', () => {
+      expect(findRevealButton().exists()).toBe(false);
+      expect(findHideButton().exists()).toBe(false);
+    });
+
+    it('displays value', () => {
+      expect(findFormInputGroup().props('value')).toBe(valueProp);
+    });
+
+    itDoesNotModifyCopyEvent();
+  });
+
+  describe('when `showCopyButton` is `false`', () => {
+    beforeEach(() => {
+      createComponent({
+        propsData: {
+          showCopyButton: false,
+        },
+      });
+    });
+
+    it('does not render copy button', () => {
+      expect(findCopyButton().exists()).toBe(false);
+    });
+  });
+
+  it('passes `formInputGroupProps` prop to `GlFormInputGroup`', () => {
+    createComponent({
+      propsData: {
+        formInputGroupProps: {
+          label: 'Foo bar',
+        },
+      },
+    });
+
+    expect(findFormInputGroup().props('label')).toBe('Foo bar');
+  });
+
+  it('passes `copyButtonTitle` prop to `ClipboardButton`', () => {
+    createComponent({
+      propsData: {
+        copyButtonTitle: 'Copy token',
+      },
+    });
+
+    expect(findCopyButton().props('title')).toBe('Copy token');
+  });
+});
diff --git a/spec/lib/gitlab/database/partitioning/detached_partition_dropper_spec.rb b/spec/lib/gitlab/database/partitioning/detached_partition_dropper_spec.rb
index b2c4e4b54a4..2ef873e8adb 100644
--- a/spec/lib/gitlab/database/partitioning/detached_partition_dropper_spec.rb
+++ b/spec/lib/gitlab/database/partitioning/detached_partition_dropper_spec.rb
@@ -90,18 +90,6 @@ RSpec.describe Gitlab::Database::Partitioning::DetachedPartitionDropper do
         expect(table_oid('test_partition')).to be_nil
       end
 
-      context 'when the drop_detached_partitions feature flag is disabled' do
-        before do
-          stub_feature_flags(drop_detached_partitions: false)
-        end
-
-        it 'does not drop the partition' do
-          dropper.perform
-
-          expect(table_oid('test_partition')).not_to be_nil
-        end
-      end
-
       context 'removing foreign keys' do
         it 'removes foreign keys from the table before dropping it' do
           expect(dropper).to receive(:drop_detached_partition).and_wrap_original do |drop_method, partition_name|
diff --git a/spec/lib/gitlab/database/partitioning/partition_manager_spec.rb b/spec/lib/gitlab/database/partitioning/partition_manager_spec.rb
index 09f50c6507a..5e107109fc9 100644
--- a/spec/lib/gitlab/database/partitioning/partition_manager_spec.rb
+++ b/spec/lib/gitlab/database/partitioning/partition_manager_spec.rb
@@ -101,28 +101,10 @@ RSpec.describe Gitlab::Database::Partitioning::PartitionManager do
       ]
     end
 
-    context 'with the partition_pruning feature flag enabled' do
-      before do
-        stub_feature_flags(partition_pruning: true)
-      end
+    it 'detaches each extra partition' do
+      extra_partitions.each { |p| expect(manager).to receive(:detach_one_partition).with(p) }
 
-      it 'detaches each extra partition' do
-        extra_partitions.each { |p| expect(manager).to receive(:detach_one_partition).with(p) }
-
-        sync_partitions
-      end
-    end
-
-    context 'with the partition_pruning feature flag disabled' do
-      before do
-        stub_feature_flags(partition_pruning: false)
-      end
-
-      it 'returns immediately' do
-        expect(manager).not_to receive(:detach)
-
-        sync_partitions
-      end
+      sync_partitions
     end
   end
 
diff --git a/spec/requests/api/ci/jobs_spec.rb b/spec/requests/api/ci/jobs_spec.rb
index 4978630b5ef..7c85cbc31a5 100644
--- a/spec/requests/api/ci/jobs_spec.rb
+++ b/spec/requests/api/ci/jobs_spec.rb
@@ -428,6 +428,26 @@ RSpec.describe API::Ci::Jobs do
       end
     end
 
+    context 'when job succeeded' do
+      it 'does not return failure_reason' do
+        get api("/projects/#{project.id}/jobs/#{job.id}", api_user)
+
+        expect(json_response).not_to include('failure_reason')
+      end
+    end
+
+    context 'when job failed' do
+      let(:job) do
+        create(:ci_build, :failed, :tags, pipeline: pipeline)
+      end
+
+      it 'returns failure_reason' do
+        get api("/projects/#{project.id}/jobs/#{job.id}", api_user)
+
+        expect(json_response).to include('failure_reason')
+      end
+    end
+
     context 'when trace artifact record exists with no stored file', :skip_before_request do
       before do
         create(:ci_job_artifact, :unarchived_trace_artifact, job: job, project: job.project)
diff --git a/spec/services/ci/retry_build_service_spec.rb b/spec/services/ci/retry_build_service_spec.rb
index fc6ae267034..16635c64434 100644
--- a/spec/services/ci/retry_build_service_spec.rb
+++ b/spec/services/ci/retry_build_service_spec.rb
@@ -125,14 +125,6 @@ RSpec.describe Ci::RetryBuildService do
         expect(new_build.needs_attributes).to match(build.needs_attributes)
         expect(new_build.needs).not_to match(build.needs)
       end
-
-      it 'clones only the job variables attributes' do
-        expect(new_build.job_variables.exists?).to be_truthy
-        expect(build.job_variables.exists?).to be_truthy
-
-        expect(new_build.job_variables_attributes).to match(build.job_variables_attributes)
-        expect(new_build.job_variables).not_to match(build.job_variables)
-      end
     end
 
     describe 'reject accessors' do
@@ -155,7 +147,7 @@ RSpec.describe Ci::RetryBuildService do
         Ci::Build.attribute_names.map(&:to_sym) +
         Ci::Build.attribute_aliases.keys.map(&:to_sym) +
         Ci::Build.reflect_on_all_associations.map(&:name) +
-        [:tag_list, :needs_attributes, :job_variables_attributes] -
+        [:tag_list, :needs_attributes] -
         # ee-specific accessors should be tested in ee/spec/services/ci/retry_build_service_spec.rb instead
         described_class.extra_accessors -
         [:dast_site_profiles_build, :dast_scanner_profiles_build] # join tables
diff --git a/spec/simplecov_env.rb b/spec/simplecov_env.rb
index 25dd3a937ca..a5efc8348a4 100644
--- a/spec/simplecov_env.rb
+++ b/spec/simplecov_env.rb
@@ -2,6 +2,7 @@
 
 require 'simplecov'
 require 'simplecov-cobertura'
+require 'simplecov-lcov'
 require_relative '../lib/gitlab/utils'
 
 module SimpleCovEnv
@@ -18,10 +19,13 @@ module SimpleCovEnv
   end
 
   def configure_formatter
+    SimpleCov::Formatter::LcovFormatter.config.report_with_single_file = true
+
     SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new([
       SimpleCov::Formatter::SimpleFormatter,
       SimpleCov::Formatter::HTMLFormatter,
-      SimpleCov::Formatter::CoberturaFormatter
+      SimpleCov::Formatter::CoberturaFormatter,
+      SimpleCov::Formatter::LcovFormatter
     ])
   end