Make quick action "commands applied" banner more useful56100-make-quick-action-commands-applied-banner-more-useful

Extends the quick actions "commands applied" banner to show
the quick action preview text, but with everything in past tense.

22 files changed, 917 insertions, 151 deletions

diff --git a/app/models/label.rb b/app/models/label.rb
index dd403562bfa..25de26b8384 100644
--- a/app/models/label.rb
+++ b/app/models/label.rb
@@ -137,6 +137,10 @@ class Label < ApplicationRecord
     where(id: ids)
   end
 
+  def self.on_project_board?(project_id, label_id)
+    on_project_boards(project_id).where(id: label_id).exists?
+  end
+
   def open_issues_count(user = nil)
     issues_count(user, state: 'opened')
   end
diff --git a/app/services/notes/create_service.rb b/app/services/notes/create_service.rb
index 1b46f6d8a72..194c4a43dbc 100644
--- a/app/services/notes/create_service.rb
+++ b/app/services/notes/create_service.rb
@@ -21,7 +21,7 @@ module Notes
 
       if quick_actions_service.supported?(note)
         options = { merge_request_diff_head_sha: merge_request_diff_head_sha }
-        content, update_params = quick_actions_service.execute(note, options)
+        content, update_params, message = quick_actions_service.execute(note, options)
 
         only_commands = content.empty?
 
@@ -52,7 +52,7 @@ module Notes
         # We must add the error after we call #save because errors are reset
         # when #save is called
         if only_commands
-          note.errors.add(:commands_only, 'Commands applied')
+          note.errors.add(:commands_only, message.presence || _('Commands did not apply'))
         end
       end
 
diff --git a/app/services/quick_actions/interpret_service.rb b/app/services/quick_actions/interpret_service.rb
index 8ff73522e5f..7f944e25887 100644
--- a/app/services/quick_actions/interpret_service.rb
+++ b/app/services/quick_actions/interpret_service.rb
@@ -31,17 +31,19 @@ module QuickActions
     end
 
     # Takes a text and interprets the commands that are extracted from it.
-    # Returns the content without commands, and hash of changes to be applied to a record.
+    # Returns the content without commands, a hash of changes to be applied to a record
+    # and a string containing the execution_message to show to the user.
     def execute(content, quick_action_target, only: nil)
-      return [content, {}] unless current_user.can?(:use_quick_actions)
+      return [content, {}, ''] unless current_user.can?(:use_quick_actions)
 
       @quick_action_target = quick_action_target
       @updates = {}
+      @execution_message = {}
 
       content, commands = extractor.extract_commands(content, only: only)
       extract_updates(commands)
 
-      [content, @updates]
+      [content, @updates, execution_messages_for(commands)]
     end
 
     # Takes a text and interprets the commands that are extracted from it.
@@ -119,8 +121,12 @@ module QuickActions
       labels_params.scan(/"([^"]+)"|([^ ]+)/).flatten.compact
     end
 
-    def find_label_references(labels_param)
-      find_labels(labels_param).map(&:to_reference)
+    def find_label_references(labels_param, format = :id)
+      labels_to_reference(find_labels(labels_param), format)
+    end
+
+    def labels_to_reference(labels, format = :id)
+      labels.map { |l| l.to_reference(format: format) }
     end
 
     def find_label_ids(labels_param)
@@ -128,11 +134,24 @@ module QuickActions
     end
 
     def explain_commands(commands)
+      map_commands(commands, :explain)
+    end
+
+    def execution_messages_for(commands)
+      map_commands(commands, :execute_message).join(' ')
+    end
+
+    def map_commands(commands, method)
       commands.map do |name, arg|
         definition = self.class.definition_by_name(name)
         next unless definition
 
-        definition.explain(self, arg)
+        case method
+        when :explain
+          definition.explain(self, arg)
+        when :execute_message
+          @execution_message[name.to_sym] || definition.execute_message(self, arg)
+        end
       end.compact
     end
 
diff --git a/changelogs/unreleased/56100-make-quick-action-commands-applied-banner-more-useful.yml b/changelogs/unreleased/56100-make-quick-action-commands-applied-banner-more-useful.yml
new file mode 100644
index 00000000000..a2fa07c6ed2
--- /dev/null
+++ b/changelogs/unreleased/56100-make-quick-action-commands-applied-banner-more-useful.yml
@@ -0,0 +1,5 @@
+---
+title: Make quick action commands applied banner more useful
+merge_request: 26672
+author: Jacopo Beschi @jacopo-beschi
+type: added
diff --git a/doc/user/project/quick_actions.md b/doc/user/project/quick_actions.md
index f81669a41c9..7777e2f35ed 100644
--- a/doc/user/project/quick_actions.md
+++ b/doc/user/project/quick_actions.md
@@ -5,7 +5,8 @@ and commits that are usually done by clicking buttons or dropdowns in GitLab's U
 You can enter these commands while creating a new issue or merge request, or
 in comments of issues, epics, merge requests, and commits. Each command should be
 on a separate line in order to be properly detected and executed. Once executed,
-the commands are removed from the text body and not visible to anyone else.
+
+> From [GitLab 12.1](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/26672), an alert is displayed when a quick action is successfully applied.
 
 ## Quick actions for issues and merge requests
 
diff --git a/lib/gitlab/quick_actions/command_definition.rb b/lib/gitlab/quick_actions/command_definition.rb
index 93030fd454e..ebdae139315 100644
--- a/lib/gitlab/quick_actions/command_definition.rb
+++ b/lib/gitlab/quick_actions/command_definition.rb
@@ -3,8 +3,8 @@
 module Gitlab
   module QuickActions
     class CommandDefinition
-      attr_accessor :name, :aliases, :description, :explanation, :params,
-        :condition_block, :parse_params_block, :action_block, :warning, :types
+      attr_accessor :name, :aliases, :description, :explanation, :execution_message,
+        :params, :condition_block, :parse_params_block, :action_block, :warning, :types
 
       def initialize(name, attributes = {})
         @name = name
@@ -13,6 +13,7 @@ module Gitlab
         @description = attributes[:description] || ''
         @warning = attributes[:warning] || ''
         @explanation = attributes[:explanation] || ''
+        @execution_message = attributes[:execution_message] || ''
         @params = attributes[:params] || []
         @condition_block = attributes[:condition_block]
         @parse_params_block = attributes[:parse_params_block]
@@ -48,13 +49,23 @@ module Gitlab
       end
 
       def execute(context, arg)
-        return if noop? || !available?(context)
+        return unless executable?(context)
 
         count_commands_executed_in(context)
 
         execute_block(action_block, context, arg)
       end
 
+      def execute_message(context, arg)
+        return unless executable?(context)
+
+        if execution_message.respond_to?(:call)
+          execute_block(execution_message, context, arg)
+        else
+          execution_message
+        end
+      end
+
       def to_h(context)
         desc = description
         if desc.respond_to?(:call)
@@ -77,6 +88,10 @@ module Gitlab
 
       private
 
+      def executable?(context)
+        !noop? && available?(context)
+      end
+
       def count_commands_executed_in(context)
         return unless context.respond_to?(:commands_executed_count=)
 
diff --git a/lib/gitlab/quick_actions/commit_actions.rb b/lib/gitlab/quick_actions/commit_actions.rb
index 1018910e8e9..49f5ddf24eb 100644
--- a/lib/gitlab/quick_actions/commit_actions.rb
+++ b/lib/gitlab/quick_actions/commit_actions.rb
@@ -16,6 +16,13 @@ module Gitlab
             _("Tags this commit to %{tag_name}.") % { tag_name: tag_name }
           end
         end
+        execution_message do |tag_name, message|
+          if message.present?
+            _("Tagged this commit to %{tag_name} with \"%{message}\".") % { tag_name: tag_name, message: message }
+          else
+            _("Tagged this commit to %{tag_name}.") % { tag_name: tag_name }
+          end
+        end
         params 'v1.2.3 <message>'
         parse_params do |tag_name_and_message|
           tag_name_and_message.split(' ', 2)
diff --git a/lib/gitlab/quick_actions/dsl.rb b/lib/gitlab/quick_actions/dsl.rb
index ecb2169151e..5abbd377642 100644
--- a/lib/gitlab/quick_actions/dsl.rb
+++ b/lib/gitlab/quick_actions/dsl.rb
@@ -66,6 +66,35 @@ module Gitlab
           @explanation = block_given? ? block : text
         end
 
+        # Allows to provide a message about quick action execution result, success or failure.
+        # This message is shown after quick action execution and after saving the note.
+        #
+        # Example:
+        #
+        #   execution_message do |arguments|
+        #     "Added label(s) #{arguments.join(' ')}"
+        #   end
+        #   command :command_key do |arguments|
+        #     # Awesome code block
+        #   end
+        #
+        # Note: The execution_message won't be executed unless the condition block returns true.
+        #       execution_message block is executed always after the command block has run,
+        #       for this reason if the condition block doesn't return true after the command block has
+        #       run you need to set the @execution_message variable inside the command block instead as
+        #       shown in the following example.
+        #
+        # Example using instance variable:
+        #
+        #   command :command_key do |arguments|
+        #     # Awesome code block
+        #     @execution_message[:command_key] = 'command_key executed successfully'
+        #   end
+        #
+        def execution_message(text = '', &block)
+          @execution_message = block_given? ? block : text
+        end
+
         # Allows to define type(s) that must be met in order for the command
         # to be returned by `.command_names` & `.command_definitions`.
         #
@@ -121,10 +150,16 @@ module Gitlab
         # comment.
         # It accepts aliases and takes a block.
         #
+        # You can also set the @execution_message instance variable, on conflicts with
+        # execution_message method the instance variable has precedence.
+        #
         # Example:
         #
         #   command :my_command, :alias_for_my_command do |arguments|
         #     # Awesome code block
+        #     @updates[:my_command] = 'foo'
+        #
+        #     @execution_message[:my_command] = 'my_command executed successfully'
         #   end
         def command(*command_names, &block)
           define_command(CommandDefinition, *command_names, &block)
@@ -158,6 +193,7 @@ module Gitlab
             description: @description,
             warning: @warning,
             explanation: @explanation,
+            execution_message: @execution_message,
             params: @params,
             condition_block: @condition_block,
             parse_params_block: @parse_params_block,
@@ -173,6 +209,7 @@ module Gitlab
 
           @description = nil
           @explanation = nil
+          @execution_message = nil
           @params = nil
           @condition_block = nil
           @warning = nil
diff --git a/lib/gitlab/quick_actions/issuable_actions.rb b/lib/gitlab/quick_actions/issuable_actions.rb
index f7f89d4e897..b975a967d03 100644
--- a/lib/gitlab/quick_actions/issuable_actions.rb
+++ b/lib/gitlab/quick_actions/issuable_actions.rb
@@ -12,10 +12,16 @@ module Gitlab
       included do
         # Issue, MergeRequest, Epic: quick actions definitions
         desc do
-          "Close this #{quick_action_target.to_ability_name.humanize(capitalize: false)}"
+          _('Close this %{quick_action_target}') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
         end
         explanation do
-          "Closes this #{quick_action_target.to_ability_name.humanize(capitalize: false)}."
+          _('Closes this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
+        end
+        execution_message do
+          _('Closed this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
         end
         types Issuable
         condition do
@@ -28,10 +34,16 @@ module Gitlab
         end
 
         desc do
-          "Reopen this #{quick_action_target.to_ability_name.humanize(capitalize: false)}"
+          _('Reopen this %{quick_action_target}') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
         end
         explanation do
-          "Reopens this #{quick_action_target.to_ability_name.humanize(capitalize: false)}."
+          _('Reopens this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
+        end
+        execution_message do
+          _('Reopened this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
         end
         types Issuable
         condition do
@@ -45,7 +57,10 @@ module Gitlab
 
         desc _('Change title')
         explanation do |title_param|
-          _("Changes the title to \"%{title_param}\".") % { title_param: title_param }
+          _('Changes the title to "%{title_param}".') % { title_param: title_param }
+        end
+        execution_message do |title_param|
+          _('Changed the title to "%{title_param}".') % { title_param: title_param }
         end
         params '<New title>'
         types Issuable
@@ -61,7 +76,10 @@ module Gitlab
         explanation do |labels_param|
           labels = find_label_references(labels_param)
 
-          "Adds #{labels.join(' ')} #{'label'.pluralize(labels.count)}." if labels.any?
+          if labels.any?
+            _("Adds %{labels} %{label_text}.") %
+              { labels: labels.join(' '), label_text: 'label'.pluralize(labels.count) }
+          end
         end
         params '~label1 ~"label 2"'
         types Issuable
@@ -71,21 +89,15 @@ module Gitlab
             find_labels.any?
         end
         command :label do |labels_param|
-          label_ids = find_label_ids(labels_param)
-
-          if label_ids.any?
-            @updates[:add_label_ids] ||= []
-            @updates[:add_label_ids] += label_ids
-
-            @updates[:add_label_ids].uniq!
-          end
+          run_label_command(labels: find_labels(labels_param), command: :label, updates_key: :add_label_ids)
         end
 
         desc _('Remove all or specific label(s)')
         explanation do |labels_param = nil|
-          if labels_param.present?
-            labels = find_label_references(labels_param)
-            "Removes #{labels.join(' ')} #{'label'.pluralize(labels.count)}." if labels.any?
+          label_references = labels_param.present? ? find_label_references(labels_param) : []
+          if label_references.any?
+            _("Removes %{label_references} %{label_text}.") %
+              { label_references: label_references.join(' '), label_text: 'label'.pluralize(label_references.count) }
           else
             _('Removes all labels.')
           end
@@ -99,7 +111,9 @@ module Gitlab
         end
         command :unlabel do |labels_param = nil|
           if labels_param.present?
-            label_ids = find_label_ids(labels_param)
+            labels = find_labels(labels_param)
+            label_ids = labels.map(&:id)
+            label_references = labels_to_reference(labels, :name)
 
             if label_ids.any?
               @updates[:remove_label_ids] ||= []
@@ -109,7 +123,10 @@ module Gitlab
             end
           else
             @updates[:label_ids] = []
+            label_references = []
           end
+
+          @execution_message[:unlabel] = remove_label_message(label_references)
         end
 
         desc _('Replace all label(s)')
@@ -125,18 +142,12 @@ module Gitlab
             current_user.can?(:"admin_#{quick_action_target.to_ability_name}", parent)
         end
         command :relabel do |labels_param|
-          label_ids = find_label_ids(labels_param)
-
-          if label_ids.any?
-            @updates[:label_ids] ||= []
-            @updates[:label_ids] += label_ids
-
-            @updates[:label_ids].uniq!
-          end
+          run_label_command(labels: find_labels(labels_param), command: :relabel, updates_key: :label_ids)
         end
 
         desc _('Add a todo')
         explanation _('Adds a todo.')
+        execution_message _('Added a todo.')
         types Issuable
         condition do
           quick_action_target.persisted? &&
@@ -148,6 +159,7 @@ module Gitlab
 
         desc _('Mark to do as done')
         explanation _('Marks to do as done.')
+        execution_message _('Marked to do as done.')
         types Issuable
         condition do
           quick_action_target.persisted? &&
@@ -159,7 +171,12 @@ module Gitlab
 
         desc _('Subscribe')
         explanation do
-          "Subscribes to this #{quick_action_target.to_ability_name.humanize(capitalize: false)}."
+          _('Subscribes to this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
+        end
+        execution_message do
+          _('Subscribed to this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
         end
         types Issuable
         condition do
@@ -172,7 +189,12 @@ module Gitlab
 
         desc _('Unsubscribe')
         explanation do
-          "Unsubscribes from this #{quick_action_target.to_ability_name.humanize(capitalize: false)}."
+          _('Unsubscribes from this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
+        end
+        execution_message do
+          _('Unsubscribed from this %{quick_action_target}.') %
+            { quick_action_target: quick_action_target.to_ability_name.humanize(capitalize: false) }
         end
         types Issuable
         condition do
@@ -187,6 +209,9 @@ module Gitlab
         explanation do |name|
           _("Toggles :%{name}: emoji award.") % { name: name } if name
         end
+        execution_message do |name|
+          _("Toggled :%{name}: emoji award.") % { name: name } if name
+        end
         params ':emoji:'
         types Issuable
         condition do
@@ -215,6 +240,41 @@ module Gitlab
         substitution :tableflip do |comment|
           "#{comment} #{TABLEFLIP}"
         end
+
+        private
+
+        def run_label_command(labels:, command:, updates_key:)
+          return if labels.empty?
+
+          @updates[updates_key] ||= []
+          @updates[updates_key] += labels.map(&:id)
+          @updates[updates_key].uniq!
+
+          label_references = labels_to_reference(labels, :name)
+          @execution_message[command] = case command
+                                        when :relabel
+                                          _('Replaced all labels with %{label_references} %{label_text}.') %
+                                            {
+                                            label_references: label_references.join(' '),
+                                            label_text: 'label'.pluralize(label_references.count)
+                                          }
+                                        when :label
+                                          _('Added %{label_references} %{label_text}.') %
+                                            {
+                                            label_references: label_references.join(' '),
+                                            label_text: 'label'.pluralize(labels.count)
+                                          }
+                                        end
+        end
+
+        def remove_label_message(label_references)
+          if label_references.any?
+            _("Removed %{label_references} %{label_text}.") %
+              { label_references: label_references.join(' '), label_text: 'label'.pluralize(label_references.count) }
+          else
+            _('Removed all labels.')
+          end
+        end
       end
     end
   end
diff --git a/lib/gitlab/quick_actions/issue_actions.rb b/lib/gitlab/quick_actions/issue_actions.rb
index 85e62f950c8..0868bd85600 100644
--- a/lib/gitlab/quick_actions/issue_actions.rb
+++ b/lib/gitlab/quick_actions/issue_actions.rb
@@ -12,6 +12,9 @@ module Gitlab
         explanation do |due_date|
           _("Sets the due date to %{due_date}.") % { due_date: due_date.strftime('%b %-d, %Y') } if due_date
         end
+        execution_message do |due_date|
+          _("Set the due date to %{due_date}.") % { due_date: due_date.strftime('%b %-d, %Y') } if due_date
+        end
         params '<in 2 days | this Friday | December 31st>'
         types Issue
         condition do
@@ -27,6 +30,7 @@ module Gitlab
 
         desc _('Remove due date')
         explanation _('Removes the due date.')
+        execution_message _('Removed the due date.')
         types Issue
         condition do
           quick_action_target.persisted? &&
@@ -49,22 +53,27 @@ module Gitlab
           current_user.can?(:"update_#{quick_action_target.to_ability_name}", quick_action_target) &&
             quick_action_target.project.boards.count == 1
         end
-        # rubocop: disable CodeReuse/ActiveRecord
         command :board_move do |target_list_name|
-          label_ids = find_label_ids(target_list_name)
+          labels = find_labels(target_list_name)
+          label_ids = labels.map(&:id)
 
           if label_ids.size == 1
             label_id = label_ids.first
 
             # Ensure this label corresponds to a list on the board
-            next unless Label.on_project_boards(quick_action_target.project_id).where(id: label_id).exists?
+            next unless Label.on_project_board?(quick_action_target.project_id, label_id)
 
             @updates[:remove_label_ids] =
-              quick_action_target.labels.on_project_boards(quick_action_target.project_id).where.not(id: label_id).pluck(:id)
+              quick_action_target.labels.on_project_boards(quick_action_target.project_id).where.not(id: label_id).pluck(:id) # rubocop: disable CodeReuse/ActiveRecord
             @updates[:add_label_ids] = [label_id]
+
+            message = _("Moved issue to %{label} column in the board.") % { label: labels_to_reference(labels).first }
+          else
+            message = _('Move this issue failed because you need to specify only one label.')
           end
+
+          @execution_message[:board_move] = message
         end
-        # rubocop: enable CodeReuse/ActiveRecord
 
         desc _('Mark this issue as a duplicate of another issue')
         explanation do |duplicate_reference|
@@ -81,7 +90,13 @@ module Gitlab
 
           if canonical_issue.present?
             @updates[:canonical_issue_id] = canonical_issue.id
+
+            message = _("Marked this issue as a duplicate of %{duplicate_param}.") % { duplicate_param: duplicate_param }
+          else
+            message = _('Mark as duplicate failed because referenced issue was not found')
           end
+
+          @execution_message[:duplicate] = message
         end
 
         desc _('Move this issue to another project.')
@@ -99,13 +114,22 @@ module Gitlab
 
           if target_project.present?
             @updates[:target_project] = target_project
+
+            message = _("Moved this issue to %{path_to_project}.") % { path_to_project: target_project_path }
+          else
+            message = _("Move this issue failed because target project doesn't exists")
           end
+
+          @execution_message[:move] = message
         end
 
         desc _('Make issue confidential.')
         explanation do
           _('Makes this issue confidential')
         end
+        execution_message do
+          _('Made this issue confidential')
+        end
         types Issue
         condition do
           current_user.can?(:"admin_#{quick_action_target.to_ability_name}", quick_action_target)
@@ -119,7 +143,14 @@ module Gitlab
           if branch_name
             _("Creates branch '%{branch_name}' and a merge request to resolve this issue") % { branch_name: branch_name }
           else
-            "Creates a branch and a merge request to resolve this issue"
+            _('Creates a branch and a merge request to resolve this issue')
+          end
+        end
+        execution_message do |branch_name = nil|
+          if branch_name
+            _("Created branch '%{branch_name}' and a merge request to resolve this issue") % { branch_name: branch_name }
+          else
+            _('Created a branch and a merge request to resolve this issue')
           end
         end
         params "<branch name>"
diff --git a/lib/gitlab/quick_actions/issue_and_merge_request_actions.rb b/lib/gitlab/quick_actions/issue_and_merge_request_actions.rb
index e1579cfddc0..41ffd51cde8 100644
--- a/lib/gitlab/quick_actions/issue_and_merge_request_actions.rb
+++ b/lib/gitlab/quick_actions/issue_and_merge_request_actions.rb
@@ -9,12 +9,9 @@ module Gitlab
       included do
         # Issue, MergeRequest: quick actions definitions
         desc _('Assign')
-        # rubocop: disable CodeReuse/ActiveRecord
         explanation do |users|
-          users = quick_action_target.allows_multiple_assignees? ? users : users.take(1)
-          "Assigns #{users.map(&:to_reference).to_sentence}."
+          _('Assigns %{assignee_users_sentence}.') % { assignee_users_sentence: assignee_users_sentence(users) }
         end
-        # rubocop: enable CodeReuse/ActiveRecord
         params do
           quick_action_target.allows_multiple_assignees? ? '@user1 @user2' : '@user'
         end
@@ -26,7 +23,10 @@ module Gitlab
           extract_users(assignee_param)
         end
         command :assign do |users|
-          next if users.empty?
+          if users.empty?
+            @execution_message[:assign] = _("Assign command failed because no user was found")
+            next
+          end
 
           if quick_action_target.allows_multiple_assignees?
             @updates[:assignee_ids] ||= quick_action_target.assignees.map(&:id)
@@ -34,6 +34,8 @@ module Gitlab
           else
             @updates[:assignee_ids] = [users.first.id]
           end
+
+          @execution_message[:assign] = _('Assigned %{assignee_users_sentence}.') % { assignee_users_sentence: assignee_users_sentence(users) }
         end
 
         desc do
@@ -44,9 +46,14 @@ module Gitlab
           end
         end
         explanation do |users = nil|
-          assignees = quick_action_target.assignees
-          assignees &= users if users.present? && quick_action_target.allows_multiple_assignees?
-          "Removes #{'assignee'.pluralize(assignees.size)} #{assignees.map(&:to_reference).to_sentence}."
+          assignees = assignees_for_removal(users)
+          _("Removes %{assignee_text} %{assignee_references}.") %
+            { assignee_text: 'assignee'.pluralize(assignees.size), assignee_references: assignees.map(&:to_reference).to_sentence }
+        end
+        execution_message do |users = nil|
+          assignees = assignees_for_removal(users)
+          _("Removed %{assignee_text} %{assignee_references}.") %
+            { assignee_text: 'assignee'.pluralize(assignees.size), assignee_references: assignees.map(&:to_reference).to_sentence }
         end
         params do
           quick_action_target.allows_multiple_assignees? ? '@user1 @user2' : ''
@@ -74,6 +81,9 @@ module Gitlab
         explanation do |milestone|
           _("Sets the milestone to %{milestone_reference}.") % { milestone_reference: milestone.to_reference } if milestone
         end
+        execution_message do |milestone|
+          _("Set the milestone to %{milestone_reference}.") % { milestone_reference: milestone.to_reference } if milestone
+        end
         params '%"milestone"'
         types Issue, MergeRequest
         condition do
@@ -92,6 +102,9 @@ module Gitlab
         explanation do
           _("Removes %{milestone_reference} milestone.") % { milestone_reference: quick_action_target.milestone.to_reference(format: :name) }
         end
+        execution_message do
+          _("Removed %{milestone_reference} milestone.") % { milestone_reference: quick_action_target.milestone.to_reference(format: :name) }
+        end
         types Issue, MergeRequest
         condition do
           quick_action_target.persisted? &&
@@ -116,17 +129,22 @@ module Gitlab
             extract_references(issuable_param, :merge_request).first
         end
         command :copy_metadata do |source_issuable|
-          if source_issuable.present? && source_issuable.project.id == quick_action_target.project.id
+          if can_copy_metadata?(source_issuable)
             @updates[:add_label_ids] = source_issuable.labels.map(&:id)
             @updates[:milestone_id] = source_issuable.milestone.id if source_issuable.milestone
+
+            @execution_message[:copy_metadata] = _("Copied labels and milestone from %{source_issuable_reference}.") % { source_issuable_reference: source_issuable.to_reference }
           end
         end
 
         desc _('Set time estimate')
         explanation do |time_estimate|
-          time_estimate = Gitlab::TimeTrackingFormatter.output(time_estimate)
-
-          _("Sets time estimate to %{time_estimate}.") % { time_estimate: time_estimate } if time_estimate
+          formatted_time_estimate = format_time_estimate(time_estimate)
+          _("Sets time estimate to %{time_estimate}.") % { time_estimate: formatted_time_estimate } if formatted_time_estimate
+        end
+        execution_message do |time_estimate|
+          formatted_time_estimate = format_time_estimate(time_estimate)
+          _("Set time estimate to %{time_estimate}.") % { time_estimate: formatted_time_estimate } if formatted_time_estimate
         end
         params '<1w 3d 2h 14m>'
         types Issue, MergeRequest
@@ -144,18 +162,12 @@ module Gitlab
 
         desc _('Add or subtract spent time')
         explanation do |time_spent, time_spent_date|
-          if time_spent
-            if time_spent > 0
-              verb = _('Adds')
-              value = time_spent
-            else
-              verb = _('Subtracts')
-              value = -time_spent
-            end
-
-            _("%{verb} %{time_spent_value} spent time.") % { verb: verb, time_spent_value: Gitlab::TimeTrackingFormatter.output(value) }
-          end
+          spend_time_message(time_spent, time_spent_date, false)
         end
+        execution_message do |time_spent, time_spent_date|
+          spend_time_message(time_spent, time_spent_date, true)
+        end
+
         params '<time(1h30m | -1h30m)> <date(YYYY-MM-DD)>'
         types Issue, MergeRequest
         condition do
@@ -176,6 +188,7 @@ module Gitlab
 
         desc _('Remove time estimate')
         explanation _('Removes time estimate.')
+        execution_message _('Removed time estimate.')
         types Issue, MergeRequest
         condition do
           quick_action_target.persisted? &&
@@ -187,6 +200,7 @@ module Gitlab
 
         desc _('Remove spent time')
         explanation _('Removes spent time.')
+        execution_message _('Removed spent time.')
         condition do
           quick_action_target.persisted? &&
             current_user.can?(:"admin_#{quick_action_target.to_ability_name}", project)
@@ -198,6 +212,7 @@ module Gitlab
 
         desc _("Lock the discussion")
         explanation _("Locks the discussion")
+        execution_message _("Locked the discussion")
         types Issue, MergeRequest
         condition do
           quick_action_target.persisted? &&
@@ -210,6 +225,7 @@ module Gitlab
 
         desc _("Unlock the discussion")
         explanation _("Unlocks the discussion")
+        execution_message _("Unlocked the discussion")
         types Issue, MergeRequest
         condition do
           quick_action_target.persisted? &&
@@ -219,6 +235,47 @@ module Gitlab
         command :unlock do
           @updates[:discussion_locked] = false
         end
+
+        private
+
+        def assignee_users_sentence(users)
+          if quick_action_target.allows_multiple_assignees?
+            users
+          else
+            [users.first]
+          end.map(&:to_reference).to_sentence
+        end
+
+        def assignees_for_removal(users)
+          assignees = quick_action_target.assignees
+          if users.present? && quick_action_target.allows_multiple_assignees?
+            assignees & users
+          else
+            assignees
+          end
+        end
+
+        def can_copy_metadata?(source_issuable)
+          source_issuable.present? && source_issuable.project_id == quick_action_target.project_id
+        end
+
+        def format_time_estimate(time_estimate)
+          Gitlab::TimeTrackingFormatter.output(time_estimate)
+        end
+
+        def spend_time_message(time_spent, time_spent_date, paste_tense)
+          return unless time_spent
+
+          if time_spent > 0
+            verb = paste_tense ? _('Added') : _('Adds')
+            value = time_spent
+          else
+            verb = paste_tense ? _('Subtracted') : _('Subtracts')
+            value = -time_spent
+          end
+
+          _("%{verb} %{time_spent_value} spent time.") % { verb: verb, time_spent_value: format_time_estimate(value) }
+        end
       end
     end
   end
diff --git a/lib/gitlab/quick_actions/merge_request_actions.rb b/lib/gitlab/quick_actions/merge_request_actions.rb
index bade59182a1..e9127095a0d 100644
--- a/lib/gitlab/quick_actions/merge_request_actions.rb
+++ b/lib/gitlab/quick_actions/merge_request_actions.rb
@@ -8,8 +8,9 @@ module Gitlab
 
       included do
         # MergeRequest only quick actions definitions
-        desc 'Merge (when the pipeline succeeds)'
-        explanation 'Merges this merge request when the pipeline succeeds.'
+        desc _('Merge (when the pipeline succeeds)')
+        explanation _('Merges this merge request when the pipeline succeeds.')
+        execution_message _('Scheduled to merge this merge request when the pipeline succeeds.')
         types MergeRequest
         condition do
           last_diff_sha = params && params[:merge_request_diff_head_sha]
@@ -22,10 +23,22 @@ module Gitlab
 
         desc 'Toggle the Work In Progress status'
         explanation do
-          verb = quick_action_target.work_in_progress? ? 'Unmarks' : 'Marks'
           noun = quick_action_target.to_ability_name.humanize(capitalize: false)
-          "#{verb} this #{noun} as Work In Progress."
+          if quick_action_target.work_in_progress?
+            _("Unmarks this %{noun} as Work In Progress.")
+          else
+            _("Marks this %{noun} as Work In Progress.")
+          end % { noun: noun }
         end
+        execution_message do
+          noun = quick_action_target.to_ability_name.humanize(capitalize: false)
+          if quick_action_target.work_in_progress?
+            _("Unmarked this %{noun} as Work In Progress.")
+          else
+            _("Marked this %{noun} as Work In Progress.")
+          end % { noun: noun }
+        end
+
         types MergeRequest
         condition do
           quick_action_target.respond_to?(:work_in_progress?) &&
@@ -36,9 +49,12 @@ module Gitlab
           @updates[:wip_event] = quick_action_target.work_in_progress? ? 'unwip' : 'wip'
         end
 
-        desc 'Set target branch'
+        desc _('Set target branch')
         explanation do |branch_name|
-          "Sets target branch to #{branch_name}."
+          _('Sets target branch to %{branch_name}.') % { branch_name: branch_name }
+        end
+        execution_message do |branch_name|
+          _('Set target branch to %{branch_name}.') % { branch_name: branch_name }
         end
         params '<Local branch name>'
         types MergeRequest
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 114d245b688..b17b197878d 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -735,6 +735,15 @@ msgstr ""
 msgid "AddMember|Too many users specified (limit is %{user_limit})"
 msgstr ""
 
+msgid "Added"
+msgstr ""
+
+msgid "Added %{label_references} %{label_text}."
+msgstr ""
+
+msgid "Added a todo."
+msgstr ""
+
 msgid "Added at"
 msgstr ""
 
@@ -744,6 +753,9 @@ msgstr ""
 msgid "Adds"
 msgstr ""
 
+msgid "Adds %{labels} %{label_text}."
+msgstr ""
+
 msgid "Adds a todo."
 msgstr ""
 
@@ -1329,6 +1341,9 @@ msgstr ""
 msgid "Assign"
 msgstr ""
 
+msgid "Assign command failed because no user was found"
+msgstr ""
+
 msgid "Assign custom color like #FF0000"
 msgstr ""
 
@@ -1350,6 +1365,9 @@ msgstr ""
 msgid "Assign yourself to this issue"
 msgstr ""
 
+msgid "Assigned %{assignee_users_sentence}."
+msgstr ""
+
 msgid "Assigned Issues"
 msgstr ""
 
@@ -1367,6 +1385,9 @@ msgstr[1] ""
 msgid "Assignee(s)"
 msgstr ""
 
+msgid "Assigns %{assignee_users_sentence}."
+msgstr ""
+
 msgid "Attach a file"
 msgstr ""
 
@@ -2002,6 +2023,9 @@ msgstr ""
 msgid "ChangeTypeAction|This will create a new commit in order to revert the existing changes."
 msgstr ""
 
+msgid "Changed the title to \"%{title_param}\"."
+msgstr ""
+
 msgid "Changes"
 msgstr ""
 
@@ -2281,9 +2305,18 @@ msgstr ""
 msgid "Close sidebar"
 msgstr ""
 
+msgid "Close this %{quick_action_target}"
+msgstr ""
+
 msgid "Closed"
 msgstr ""
 
+msgid "Closed this %{quick_action_target}."
+msgstr ""
+
+msgid "Closes this %{quick_action_target}."
+msgstr ""
+
 msgid "ClusterIntegration| %{custom_domain_start}More information%{custom_domain_end}."
 msgstr ""
 
@@ -2827,6 +2860,9 @@ msgstr ""
 msgid "Commands applied"
 msgstr ""
 
+msgid "Commands did not apply"
+msgstr ""
+
 msgid "Comment"
 msgstr ""
 
@@ -3126,6 +3162,9 @@ msgstr ""
 msgid "Copied"
 msgstr ""
 
+msgid "Copied labels and milestone from %{source_issuable_reference}."
+msgstr ""
+
 msgid "Copy %{http_label} clone URL"
 msgstr ""
 
@@ -3336,6 +3375,12 @@ msgstr ""
 msgid "Created At"
 msgstr ""
 
+msgid "Created a branch and a merge request to resolve this issue"
+msgstr ""
+
+msgid "Created branch '%{branch_name}' and a merge request to resolve this issue"
+msgstr ""
+
 msgid "Created by me"
 msgstr ""
 
@@ -3345,6 +3390,9 @@ msgstr ""
 msgid "Created on:"
 msgstr ""
 
+msgid "Creates a branch and a merge request to resolve this issue"
+msgstr ""
+
 msgid "Creates branch '%{branch_name}' and a merge request to resolve this issue"
 msgstr ""
 
@@ -6277,6 +6325,9 @@ msgstr ""
 msgid "Locked by %{fileLockUserName}"
 msgstr ""
 
+msgid "Locked the discussion"
+msgstr ""
+
 msgid "Locked to current projects"
 msgstr ""
 
@@ -6295,6 +6346,9 @@ msgstr ""
 msgid "MRDiff|Show full file"
 msgstr ""
 
+msgid "Made this issue confidential"
+msgstr ""
+
 msgid "Make and review changes in the browser with the Web IDE"
 msgstr ""
 
@@ -6376,6 +6430,9 @@ msgstr ""
 msgid "Mark as done"
 msgstr ""
 
+msgid "Mark as duplicate failed because referenced issue was not found"
+msgstr ""
+
 msgid "Mark as resolved"
 msgstr ""
 
@@ -6394,6 +6451,18 @@ msgstr ""
 msgid "Markdown enabled"
 msgstr ""
 
+msgid "Marked this %{noun} as Work In Progress."
+msgstr ""
+
+msgid "Marked this issue as a duplicate of %{duplicate_param}."
+msgstr ""
+
+msgid "Marked to do as done."
+msgstr ""
+
+msgid "Marks this %{noun} as Work In Progress."
+msgstr ""
+
 msgid "Marks this issue as a duplicate of %{duplicate_reference}."
 msgstr ""
 
@@ -6439,6 +6508,9 @@ msgstr ""
 msgid "Merge"
 msgstr ""
 
+msgid "Merge (when the pipeline succeeds)"
+msgstr ""
+
 msgid "Merge Request"
 msgstr ""
 
@@ -6562,6 +6634,9 @@ msgstr ""
 msgid "Merged branches are being deleted. This can take some time depending on the number of branches. Please refresh the page to see changes."
 msgstr ""
 
+msgid "Merges this merge request when the pipeline succeeds."
+msgstr ""
+
 msgid "Messages"
 msgstr ""
 
@@ -6745,6 +6820,12 @@ msgstr ""
 msgid "Move issue from one column of the board to another"
 msgstr ""
 
+msgid "Move this issue failed because target project doesn't exists"
+msgstr ""
+
+msgid "Move this issue failed because you need to specify only one label."
+msgstr ""
+
 msgid "Move this issue to another project."
 msgstr ""
 
@@ -6754,6 +6835,12 @@ msgstr ""
 msgid "MoveIssue|Cannot move issue to project it originates from!"
 msgstr ""
 
+msgid "Moved issue to %{label} column in the board."
+msgstr ""
+
+msgid "Moved this issue to %{path_to_project}."
+msgstr ""
+
 msgid "Moves issue to %{label} column in the board."
 msgstr ""
 
@@ -8920,12 +9007,39 @@ msgstr ""
 msgid "Remove time estimate"
 msgstr ""
 
+msgid "Removed %{assignee_text} %{assignee_references}."
+msgstr ""
+
+msgid "Removed %{label_references} %{label_text}."
+msgstr ""
+
+msgid "Removed %{milestone_reference} milestone."
+msgstr ""
+
+msgid "Removed all labels."
+msgstr ""
+
 msgid "Removed group can not be restored!"
 msgstr ""
 
 msgid "Removed projects cannot be restored!"
 msgstr ""
 
+msgid "Removed spent time."
+msgstr ""
+
+msgid "Removed the due date."
+msgstr ""
+
+msgid "Removed time estimate."
+msgstr ""
+
+msgid "Removes %{assignee_text} %{assignee_references}."
+msgstr ""
+
+msgid "Removes %{label_references} %{label_text}."
+msgstr ""
+
 msgid "Removes %{milestone_reference} milestone."
 msgstr ""
 
@@ -8959,12 +9073,24 @@ msgstr ""
 msgid "Reopen milestone"
 msgstr ""
 
+msgid "Reopen this %{quick_action_target}"
+msgstr ""
+
+msgid "Reopened this %{quick_action_target}."
+msgstr ""
+
+msgid "Reopens this %{quick_action_target}."
+msgstr ""
+
 msgid "Replace"
 msgstr ""
 
 msgid "Replace all label(s)"
 msgstr ""
 
+msgid "Replaced all labels with %{label_references} %{label_text}."
+msgstr ""
+
 msgid "Reply by email"
 msgstr ""
 
@@ -9303,6 +9429,9 @@ msgstr ""
 msgid "Scheduled"
 msgstr ""
 
+msgid "Scheduled to merge this merge request when the pipeline succeeds."
+msgstr ""
+
 msgid "Schedules"
 msgstr ""
 
@@ -9630,18 +9759,33 @@ msgstr ""
 msgid "Set requirements for a user to sign-in. Enable mandatory two-factor authentication."
 msgstr ""
 
+msgid "Set target branch"
+msgstr ""
+
+msgid "Set target branch to %{branch_name}."
+msgstr ""
+
 msgid "Set the default expiration time for each job's artifacts. 0 for unlimited. The default unit is in seconds, but you can define an alternative. For example: <code>4 mins 2 sec</code>, <code>2h42min</code>."
 msgstr ""
 
+msgid "Set the due date to %{due_date}."
+msgstr ""
+
 msgid "Set the duration for which the jobs will be considered as old and expired. Once that time passes, the jobs will be archived and no longer able to be retried. Make it empty to never expire jobs. It has to be no less than 1 day, for example: <code>15 days</code>, <code>1 month</code>, <code>2 years</code>."
 msgstr ""
 
 msgid "Set the maximum file size for each job's artifacts"
 msgstr ""
 
+msgid "Set the milestone to %{milestone_reference}."
+msgstr ""
+
 msgid "Set time estimate"
 msgstr ""
 
+msgid "Set time estimate to %{time_estimate}."
+msgstr ""
+
 msgid "Set up CI/CD"
 msgstr ""
 
@@ -9687,6 +9831,9 @@ msgstr ""
 msgid "SetStatusModal|What's your status?"
 msgstr ""
 
+msgid "Sets target branch to %{branch_name}."
+msgstr ""
+
 msgid "Sets the due date to %{due_date}."
 msgstr ""
 
@@ -10268,9 +10415,18 @@ msgstr ""
 msgid "Subscribed"
 msgstr ""
 
+msgid "Subscribed to this %{quick_action_target}."
+msgstr ""
+
+msgid "Subscribes to this %{quick_action_target}."
+msgstr ""
+
 msgid "Subscription"
 msgstr ""
 
+msgid "Subtracted"
+msgstr ""
+
 msgid "Subtracts"
 msgstr ""
 
@@ -10418,6 +10574,12 @@ msgstr ""
 msgid "Tag this commit."
 msgstr ""
 
+msgid "Tagged this commit to %{tag_name} with \"%{message}\"."
+msgstr ""
+
+msgid "Tagged this commit to %{tag_name}."
+msgstr ""
+
 msgid "Tags"
 msgstr ""
 
@@ -11477,6 +11639,9 @@ msgstr ""
 msgid "ToggleButton|Toggle Status: ON"
 msgstr ""
 
+msgid "Toggled :%{name}: emoji award."
+msgstr ""
+
 msgid "Toggles :%{name}: emoji award."
 msgstr ""
 
@@ -11687,9 +11852,18 @@ msgstr ""
 msgid "Unlocked"
 msgstr ""
 
+msgid "Unlocked the discussion"
+msgstr ""
+
 msgid "Unlocks the discussion"
 msgstr ""
 
+msgid "Unmarked this %{noun} as Work In Progress."
+msgstr ""
+
+msgid "Unmarks this %{noun} as Work In Progress."
+msgstr ""
+
 msgid "Unresolve discussion"
 msgstr ""
 
@@ -11732,6 +11906,12 @@ msgstr ""
 msgid "Unsubscribe from %{type}"
 msgstr ""
 
+msgid "Unsubscribed from this %{quick_action_target}."
+msgstr ""
+
+msgid "Unsubscribes from this %{quick_action_target}."
+msgstr ""
+
 msgid "Until"
 msgstr ""
 
diff --git a/spec/lib/gitlab/quick_actions/command_definition_spec.rb b/spec/lib/gitlab/quick_actions/command_definition_spec.rb
index b6e0adbc1c2..21f2c87a755 100644
--- a/spec/lib/gitlab/quick_actions/command_definition_spec.rb
+++ b/spec/lib/gitlab/quick_actions/command_definition_spec.rb
@@ -219,6 +219,52 @@ describe Gitlab::QuickActions::CommandDefinition do
     end
   end
 
+  describe "#execute_message" do
+    context "when the command is a noop" do
+      it 'returns nil' do
+        expect(subject.execute_message({}, nil)).to be_nil
+      end
+    end
+
+    context "when the command is not a noop" do
+      before do
+        subject.action_block = proc { self.run = true }
+      end
+
+      context "when the command is not available" do
+        before do
+          subject.condition_block = proc { false }
+        end
+
+        it 'returns nil' do
+          expect(subject.execute_message({}, nil)).to be_nil
+        end
+      end
+
+      context "when the command is available" do
+        context 'when the execution_message is a static string' do
+          before do
+            subject.execution_message = 'Assigned jacopo'
+          end
+
+          it 'returns this static string' do
+            expect(subject.execute_message({}, nil)).to eq('Assigned jacopo')
+          end
+        end
+
+        context 'when the explanation is dynamic' do
+          before do
+            subject.execution_message = proc { |arg| "Assigned #{arg}" }
+          end
+
+          it 'invokes the proc' do
+            expect(subject.execute_message({}, 'Jacopo')).to eq('Assigned Jacopo')
+          end
+        end
+      end
+    end
+  end
+
   describe '#explain' do
     context 'when the command is not available' do
       before do
diff --git a/spec/lib/gitlab/quick_actions/dsl_spec.rb b/spec/lib/gitlab/quick_actions/dsl_spec.rb
index 185adab1ff6..78b9b3804c3 100644
--- a/spec/lib/gitlab/quick_actions/dsl_spec.rb
+++ b/spec/lib/gitlab/quick_actions/dsl_spec.rb
@@ -20,6 +20,9 @@ describe Gitlab::QuickActions::Dsl do
       desc do
         "A dynamic description for #{noteable.upcase}"
       end
+      execution_message do |arg|
+        "A dynamic execution message for #{noteable.upcase} passing #{arg}"
+      end
       params 'The first argument', 'The second argument'
       command :dynamic_description do |args|
         args.split
@@ -30,6 +33,7 @@ describe Gitlab::QuickActions::Dsl do
       explanation do |arg|
         "Action does something with #{arg}"
       end
+      execution_message 'Command applied correctly'
       condition do
         project == 'foo'
       end
@@ -67,6 +71,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(no_args_def.aliases).to eq([:none])
       expect(no_args_def.description).to eq('A command with no args')
       expect(no_args_def.explanation).to eq('')
+      expect(no_args_def.execution_message).to eq('')
       expect(no_args_def.params).to eq([])
       expect(no_args_def.condition_block).to be_nil
       expect(no_args_def.types).to eq([])
@@ -78,6 +83,8 @@ describe Gitlab::QuickActions::Dsl do
       expect(explanation_with_aliases_def.aliases).to eq([:once, :first])
       expect(explanation_with_aliases_def.description).to eq('')
       expect(explanation_with_aliases_def.explanation).to eq('Static explanation')
+      expect(explanation_with_aliases_def.execution_message).to eq('')
+      expect(no_args_def.params).to eq([])
       expect(explanation_with_aliases_def.params).to eq(['The first argument'])
       expect(explanation_with_aliases_def.condition_block).to be_nil
       expect(explanation_with_aliases_def.types).to eq([])
@@ -88,7 +95,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(dynamic_description_def.name).to eq(:dynamic_description)
       expect(dynamic_description_def.aliases).to eq([])
       expect(dynamic_description_def.to_h(OpenStruct.new(noteable: 'issue'))[:description]).to eq('A dynamic description for ISSUE')
-      expect(dynamic_description_def.explanation).to eq('')
+      expect(dynamic_description_def.execute_message(OpenStruct.new(noteable: 'issue'), 'arg')).to eq('A dynamic execution message for ISSUE passing arg')
       expect(dynamic_description_def.params).to eq(['The first argument', 'The second argument'])
       expect(dynamic_description_def.condition_block).to be_nil
       expect(dynamic_description_def.types).to eq([])
@@ -100,6 +107,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(cc_def.aliases).to eq([])
       expect(cc_def.description).to eq('')
       expect(cc_def.explanation).to eq('')
+      expect(cc_def.execution_message).to eq('')
       expect(cc_def.params).to eq([])
       expect(cc_def.condition_block).to be_nil
       expect(cc_def.types).to eq([])
@@ -111,6 +119,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(cond_action_def.aliases).to eq([])
       expect(cond_action_def.description).to eq('')
       expect(cond_action_def.explanation).to be_a_kind_of(Proc)
+      expect(cond_action_def.execution_message).to eq('Command applied correctly')
       expect(cond_action_def.params).to eq([])
       expect(cond_action_def.condition_block).to be_a_kind_of(Proc)
       expect(cond_action_def.types).to eq([])
@@ -122,6 +131,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(with_params_parsing_def.aliases).to eq([])
       expect(with_params_parsing_def.description).to eq('')
       expect(with_params_parsing_def.explanation).to eq('')
+      expect(with_params_parsing_def.execution_message).to eq('')
       expect(with_params_parsing_def.params).to eq([])
       expect(with_params_parsing_def.condition_block).to be_nil
       expect(with_params_parsing_def.types).to eq([])
@@ -133,6 +143,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(substitution_def.aliases).to eq([])
       expect(substitution_def.description).to eq('')
       expect(substitution_def.explanation).to eq('')
+      expect(substitution_def.execution_message).to eq('')
       expect(substitution_def.params).to eq(['<Comment>'])
       expect(substitution_def.condition_block).to be_nil
       expect(substitution_def.types).to eq([])
@@ -144,6 +155,7 @@ describe Gitlab::QuickActions::Dsl do
       expect(has_types.aliases).to eq([])
       expect(has_types.description).to eq('A command with types')
       expect(has_types.explanation).to eq('')
+      expect(has_types.execution_message).to eq('')
       expect(has_types.params).to eq([])
       expect(has_types.condition_block).to be_nil
       expect(has_types.types).to eq([Issue, Commit])
diff --git a/spec/services/quick_actions/interpret_service_spec.rb b/spec/services/quick_actions/interpret_service_spec.rb
index 71c4c3ad0d7..bf5f211b11c 100644
--- a/spec/services/quick_actions/interpret_service_spec.rb
+++ b/spec/services/quick_actions/interpret_service_spec.rb
@@ -28,61 +28,108 @@ describe QuickActions::InterpretService do
     shared_examples 'reopen command' do
       it 'returns state_event: "reopen" if content contains /reopen' do
         issuable.close!
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(state_event: 'reopen')
       end
+
+      it 'returns the reopen message' do
+        issuable.close!
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Reopened this #{issuable.to_ability_name.humanize(capitalize: false)}.")
+      end
     end
 
     shared_examples 'close command' do
       it 'returns state_event: "close" if content contains /close' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(state_event: 'close')
       end
+
+      it 'returns the close message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Closed this #{issuable.to_ability_name.humanize(capitalize: false)}.")
+      end
     end
 
     shared_examples 'title command' do
       it 'populates title: "A brand new title" if content contains /title A brand new title' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(title: 'A brand new title')
       end
+
+      it 'returns the title message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq(%{Changed the title to "A brand new title".})
+      end
     end
 
     shared_examples 'milestone command' do
       it 'fetches milestone and populates milestone_id if content contains /milestone' do
         milestone # populate the milestone
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(milestone_id: milestone.id)
       end
+
+      it 'returns the milestone message' do
+        milestone # populate the milestone
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Set the milestone to #{milestone.to_reference}.")
+      end
+
+      it 'returns empty milestone message when milestone is wrong' do
+        _, _, message = service.execute('/milestone %wrong-milestone', issuable)
+
+        expect(message).to be_empty
+      end
     end
 
     shared_examples 'remove_milestone command' do
       it 'populates milestone_id: nil if content contains /remove_milestone' do
         issuable.update!(milestone_id: milestone.id)
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(milestone_id: nil)
       end
+
+      it 'returns removed milestone message' do
+        issuable.update!(milestone_id: milestone.id)
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Removed #{milestone.to_reference} milestone.")
+      end
     end
 
     shared_examples 'label command' do
       it 'fetches label ids and populates add_label_ids if content contains /label' do
         bug # populate the label
         inprogress # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(add_label_ids: [bug.id, inprogress.id])
       end
+
+      it 'returns the label message' do
+        bug # populate the label
+        inprogress # populate the label
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Added #{bug.to_reference(format: :name)} #{inprogress.to_reference(format: :name)} labels.")
+      end
     end
 
     shared_examples 'multiple label command' do
       it 'fetches label ids and populates add_label_ids if content contains multiple /label' do
         bug # populate the label
         inprogress # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(add_label_ids: [inprogress.id, bug.id])
       end
@@ -91,7 +138,7 @@ describe QuickActions::InterpretService do
     shared_examples 'multiple label with same argument' do
       it 'prevents duplicate label ids and populates add_label_ids if content contains multiple /label' do
         inprogress # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(add_label_ids: [inprogress.id])
       end
@@ -120,16 +167,23 @@ describe QuickActions::InterpretService do
     shared_examples 'unlabel command' do
       it 'fetches label ids and populates remove_label_ids if content contains /unlabel' do
         issuable.update!(label_ids: [inprogress.id]) # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(remove_label_ids: [inprogress.id])
       end
+
+      it 'returns the unlabel message' do
+        issuable.update!(label_ids: [inprogress.id]) # populate the label
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Removed #{inprogress.to_reference(format: :name)} label.")
+      end
     end
 
     shared_examples 'multiple unlabel command' do
       it 'fetches label ids and populates remove_label_ids if content contains  mutiple /unlabel' do
         issuable.update!(label_ids: [inprogress.id, bug.id]) # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(remove_label_ids: [inprogress.id, bug.id])
       end
@@ -138,7 +192,7 @@ describe QuickActions::InterpretService do
     shared_examples 'unlabel command with no argument' do
       it 'populates label_ids: [] if content contains /unlabel with no arguments' do
         issuable.update!(label_ids: [inprogress.id]) # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(label_ids: [])
       end
@@ -148,91 +202,161 @@ describe QuickActions::InterpretService do
       it 'populates label_ids: [] if content contains /relabel' do
         issuable.update!(label_ids: [bug.id]) # populate the label
         inprogress # populate the label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(label_ids: [inprogress.id])
       end
+
+      it 'returns the relabel message' do
+        issuable.update!(label_ids: [bug.id]) # populate the label
+        inprogress # populate the label
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Replaced all labels with #{inprogress.to_reference(format: :name)} label.")
+      end
     end
 
     shared_examples 'todo command' do
       it 'populates todo_event: "add" if content contains /todo' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(todo_event: 'add')
       end
+
+      it 'returns the todo message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Added a todo.')
+      end
     end
 
     shared_examples 'done command' do
       it 'populates todo_event: "done" if content contains /done' do
         TodoService.new.mark_todo(issuable, developer)
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(todo_event: 'done')
       end
+
+      it 'returns the done message' do
+        TodoService.new.mark_todo(issuable, developer)
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Marked to do as done.')
+      end
     end
 
     shared_examples 'subscribe command' do
       it 'populates subscription_event: "subscribe" if content contains /subscribe' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(subscription_event: 'subscribe')
       end
+
+      it 'returns the subscribe message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Subscribed to this #{issuable.to_ability_name.humanize(capitalize: false)}.")
+      end
     end
 
     shared_examples 'unsubscribe command' do
       it 'populates subscription_event: "unsubscribe" if content contains /unsubscribe' do
         issuable.subscribe(developer, project)
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(subscription_event: 'unsubscribe')
       end
+
+      it 'returns the unsubscribe message' do
+        issuable.subscribe(developer, project)
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Unsubscribed from this #{issuable.to_ability_name.humanize(capitalize: false)}.")
+      end
     end
 
     shared_examples 'due command' do
+      let(:expected_date) { Date.new(2016, 8, 28) }
+
       it 'populates due_date: Date.new(2016, 8, 28) if content contains /due 2016-08-28' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
+
+        expect(updates).to eq(due_date: expected_date)
+      end
 
-        expect(updates).to eq(due_date: defined?(expected_date) ? expected_date : Date.new(2016, 8, 28))
+      it 'returns due_date message: Date.new(2016, 8, 28) if content contains /due 2016-08-28' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Set the due date to #{expected_date.to_s(:medium)}.")
       end
     end
 
     shared_examples 'remove_due_date command' do
-      it 'populates due_date: nil if content contains /remove_due_date' do
+      before do
         issuable.update!(due_date: Date.today)
-        _, updates = service.execute(content, issuable)
+      end
+
+      it 'populates due_date: nil if content contains /remove_due_date' do
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(due_date: nil)
       end
+
+      it 'returns Removed the due date' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Removed the due date.')
+      end
     end
 
     shared_examples 'wip command' do
       it 'returns wip_event: "wip" if content contains /wip' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(wip_event: 'wip')
       end
+
+      it 'returns the wip message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Marked this #{issuable.to_ability_name.humanize(capitalize: false)} as Work In Progress.")
+      end
     end
 
     shared_examples 'unwip command' do
       it 'returns wip_event: "unwip" if content contains /wip' do
         issuable.update!(title: issuable.wip_title)
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(wip_event: 'unwip')
       end
+
+      it 'returns the unwip message' do
+        issuable.update!(title: issuable.wip_title)
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Unmarked this #{issuable.to_ability_name.humanize(capitalize: false)} as Work In Progress.")
+      end
     end
 
     shared_examples 'estimate command' do
       it 'populates time_estimate: 3600 if content contains /estimate 1h' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(time_estimate: 3600)
       end
+
+      it 'returns the time_estimate formatted message' do
+        _, _, message = service.execute('/estimate 79d', issuable)
+
+        expect(message).to eq('Set time estimate to 3mo 3w 4d.')
+      end
     end
 
     shared_examples 'spend command' do
       it 'populates spend_time: 3600 if content contains /spend 1h' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(spend_time: {
                                 duration: 3600,
@@ -240,11 +364,17 @@ describe QuickActions::InterpretService do
                                 spent_at: DateTime.now.to_date
                               })
       end
+
+      it 'returns the spend_time message including the formatted duration and verb' do
+        _, _, message = service.execute('/spend -120m', issuable)
+
+        expect(message).to eq('Subtracted 2h spent time.')
+      end
     end
 
     shared_examples 'spend command with negative time' do
       it 'populates spend_time: -1800 if content contains /spend -30m' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(spend_time: {
                                 duration: -1800,
@@ -256,7 +386,7 @@ describe QuickActions::InterpretService do
 
     shared_examples 'spend command with valid date' do
       it 'populates spend time: 1800 with date in date type format' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(spend_time: {
                                 duration: 1800,
@@ -268,7 +398,7 @@ describe QuickActions::InterpretService do
 
     shared_examples 'spend command with invalid date' do
       it 'will not create any note and timelog' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq({})
       end
@@ -276,7 +406,7 @@ describe QuickActions::InterpretService do
 
     shared_examples 'spend command with future date' do
       it 'will not create any note and timelog' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq({})
       end
@@ -284,18 +414,30 @@ describe QuickActions::InterpretService do
 
     shared_examples 'remove_estimate command' do
       it 'populates time_estimate: 0 if content contains /remove_estimate' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(time_estimate: 0)
       end
+
+      it 'returns the remove_estimate message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Removed time estimate.')
+      end
     end
 
     shared_examples 'remove_time_spent command' do
       it 'populates spend_time: :reset if content contains /remove_time_spent' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(spend_time: { duration: :reset, user_id: developer.id })
       end
+
+      it 'returns the remove_time_spent message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Removed spent time.')
+      end
     end
 
     shared_examples 'lock command' do
@@ -303,10 +445,16 @@ describe QuickActions::InterpretService do
       let(:merge_request) { create(:merge_request, source_project: project, discussion_locked: false) }
 
       it 'returns discussion_locked: true if content contains /lock' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(discussion_locked: true)
       end
+
+      it 'returns the lock discussion message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Locked the discussion')
+      end
     end
 
     shared_examples 'unlock command' do
@@ -314,45 +462,79 @@ describe QuickActions::InterpretService do
       let(:merge_request) { create(:merge_request, source_project: project, discussion_locked: true) }
 
       it 'returns discussion_locked: true if content contains /unlock' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(discussion_locked: false)
       end
+
+      it 'returns the unlock discussion message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Unlocked the discussion')
+      end
     end
 
-    shared_examples 'empty command' do
+    shared_examples 'empty command' do |error_msg|
       it 'populates {} if content contains an unsupported command' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to be_empty
       end
+
+      it "returns #{error_msg || 'an empty'} message" do
+        _, _, message = service.execute(content, issuable)
+
+        if error_msg
+          expect(message).to eq(error_msg)
+        else
+          expect(message).to be_empty
+        end
+      end
     end
 
     shared_examples 'merge command' do
       let(:project) { create(:project, :repository) }
 
       it 'runs merge command if content contains /merge' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(merge: merge_request.diff_head_sha)
       end
+
+      it 'returns them merge message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Scheduled to merge this merge request when the pipeline succeeds.')
+      end
     end
 
     shared_examples 'award command' do
       it 'toggle award 100 emoji if content contains /award :100:' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(emoji_award: "100")
       end
+
+      it 'returns the award message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Toggled :100: emoji award.')
+      end
     end
 
     shared_examples 'duplicate command' do
       it 'fetches issue and populates canonical_issue_id if content contains /duplicate issue_reference' do
         issue_duplicate # populate the issue
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(canonical_issue_id: issue_duplicate.id)
       end
+
+      it 'returns the duplicate message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Marked this issue as a duplicate of #{issue_duplicate.to_reference(project)}.")
+      end
     end
 
     shared_examples 'copy_metadata command' do
@@ -360,7 +542,7 @@ describe QuickActions::InterpretService do
         source_issuable # populate the issue
         todo_label # populate this label
         inreview_label # populate this label
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates[:add_label_ids]).to match_array([inreview_label.id, todo_label.id])
 
@@ -370,19 +552,45 @@ describe QuickActions::InterpretService do
           expect(updates).not_to have_key(:milestone_id)
         end
       end
+
+      it 'returns the copy metadata message' do
+        _, _, message = service.execute("/copy_metadata #{source_issuable.to_reference}", issuable)
+
+        expect(message).to eq("Copied labels and milestone from #{source_issuable.to_reference}.")
+      end
+    end
+
+    describe 'move issue command' do
+      it 'returns the move issue message' do
+        _, _, message = service.execute("/move #{project.full_path}", issue)
+
+        expect(message).to eq("Moved this issue to #{project.full_path}.")
+      end
+
+      it 'returns move issue failure message when the referenced issue is not found' do
+        _, _, message = service.execute('/move invalid', issue)
+
+        expect(message).to eq("Move this issue failed because target project doesn't exists")
+      end
     end
 
     shared_examples 'confidential command' do
       it 'marks issue as confidential if content contains /confidential' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(confidential: true)
       end
+
+      it 'returns the confidential message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq('Made this issue confidential')
+      end
     end
 
     shared_examples 'shrug command' do
       it 'appends ¯\_(ツ)_/¯ to the comment' do
-        new_content, _ = service.execute(content, issuable)
+        new_content, _, _ = service.execute(content, issuable)
 
         expect(new_content).to end_with(described_class::SHRUG)
       end
@@ -390,7 +598,7 @@ describe QuickActions::InterpretService do
 
     shared_examples 'tableflip command' do
       it 'appends (╯°□°)╯︵ ┻━┻ to the comment' do
-        new_content, _ = service.execute(content, issuable)
+        new_content, _, _ = service.execute(content, issuable)
 
         expect(new_content).to end_with(described_class::TABLEFLIP)
       end
@@ -398,18 +606,34 @@ describe QuickActions::InterpretService do
 
     shared_examples 'tag command' do
       it 'tags a commit' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(tag_name: tag_name, tag_message: tag_message)
       end
+
+      it 'returns the tag message' do
+        _, _, message = service.execute(content, issuable)
+
+        if tag_message.present?
+          expect(message).to eq(%{Tagged this commit to #{tag_name} with "#{tag_message}".})
+        else
+          expect(message).to eq("Tagged this commit to #{tag_name}.")
+        end
+      end
     end
 
     shared_examples 'assign command' do
       it 'assigns to a single user' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(assignee_ids: [developer.id])
       end
+
+      it 'returns the assign message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Assigned #{developer.to_reference}.")
+      end
     end
 
     it_behaves_like 'reopen command' do
@@ -463,7 +687,7 @@ describe QuickActions::InterpretService do
         let(:service) { described_class.new(project, developer, {}) }
 
         it 'precheck passes and returns merge command' do
-          _, updates = service.execute('/merge', merge_request)
+          _, updates, _ = service.execute('/merge', merge_request)
 
           expect(updates).to eq(merge: nil)
         end
@@ -559,7 +783,7 @@ describe QuickActions::InterpretService do
       end
     end
 
-    it_behaves_like 'empty command' do
+    it_behaves_like 'empty command', "Assign command failed because no user was found" do
       let(:content) { '/assign @abcd1234' }
       let(:issuable) { issue }
     end
@@ -575,19 +799,33 @@ describe QuickActions::InterpretService do
       context 'Issue' do
         it 'populates assignee_ids: [] if content contains /unassign' do
           issue.update!(assignee_ids: [developer.id])
-          _, updates = service.execute(content, issue)
+          _, updates, _ = service.execute(content, issue)
 
           expect(updates).to eq(assignee_ids: [])
         end
+
+        it 'returns the unassign message for all the assignee if content contains /unassign' do
+          issue.update(assignee_ids: [developer.id, developer2.id])
+          _, _, message = service.execute(content, issue)
+
+          expect(message).to eq("Removed assignees #{developer.to_reference} and #{developer2.to_reference}.")
+        end
       end
 
       context 'Merge Request' do
         it 'populates assignee_ids: [] if content contains /unassign' do
           merge_request.update!(assignee_ids: [developer.id])
-          _, updates = service.execute(content, merge_request)
+          _, updates, _ = service.execute(content, merge_request)
 
           expect(updates).to eq(assignee_ids: [])
         end
+
+        it 'returns the unassign message for all the assignee if content contains /unassign' do
+          merge_request.update(assignee_ids: [developer.id, developer2.id])
+          _, _, message = service.execute(content, merge_request)
+
+          expect(message).to eq("Removed assignees #{developer.to_reference} and #{developer2.to_reference}.")
+        end
       end
     end
 
@@ -979,12 +1217,12 @@ describe QuickActions::InterpretService do
           let(:issuable) { issue }
         end
 
-        it_behaves_like 'empty command' do
+        it_behaves_like 'empty command', 'Mark as duplicate failed because referenced issue was not found' do
           let(:content) { "/duplicate imaginary#1234" }
           let(:issuable) { issue }
         end
 
-        it_behaves_like 'empty command' do
+        it_behaves_like 'empty command', 'Mark as duplicate failed because referenced issue was not found' do
           let(:other_project) { create(:project, :private) }
           let(:issue_duplicate) { create(:issue, project: other_project) }
 
@@ -1049,7 +1287,7 @@ describe QuickActions::InterpretService do
         let(:issuable) { issue }
       end
 
-      it_behaves_like 'empty command' do
+      it_behaves_like 'empty command', 'Mark as duplicate failed because referenced issue was not found' do
         let(:content) { '/duplicate #{issue.to_reference}' }
         let(:issuable) { issue }
       end
@@ -1132,13 +1370,13 @@ describe QuickActions::InterpretService do
       let(:service) { described_class.new(non_empty_project, developer)}
 
       it 'updates target_branch if /target_branch command is executed' do
-        _, updates = service.execute('/target_branch merge-test', merge_request)
+        _, updates, _ = service.execute('/target_branch merge-test', merge_request)
 
         expect(updates).to eq(target_branch: 'merge-test')
       end
 
       it 'handles blanks around param' do
-        _, updates = service.execute('/target_branch  merge-test     ', merge_request)
+        _, updates, _ = service.execute('/target_branch  merge-test     ', merge_request)
 
         expect(updates).to eq(target_branch: 'merge-test')
       end
@@ -1156,6 +1394,12 @@ describe QuickActions::InterpretService do
           let(:issuable) { another_merge_request }
         end
       end
+
+      it 'returns the target_branch message' do
+        _, _, message = service.execute('/target_branch merge-test', merge_request)
+
+        expect(message).to eq('Set target branch to merge-test.')
+      end
     end
 
     context '/board_move command' do
@@ -1171,13 +1415,13 @@ describe QuickActions::InterpretService do
       it 'populates remove_label_ids for all current board columns' do
         issue.update!(label_ids: [todo.id, inprogress.id])
 
-        _, updates = service.execute(content, issue)
+        _, updates, _ = service.execute(content, issue)
 
         expect(updates[:remove_label_ids]).to match_array([todo.id, inprogress.id])
       end
 
       it 'populates add_label_ids with the id of the given label' do
-        _, updates = service.execute(content, issue)
+        _, updates, _ = service.execute(content, issue)
 
         expect(updates[:add_label_ids]).to eq([inreview.id])
       end
@@ -1185,7 +1429,7 @@ describe QuickActions::InterpretService do
       it 'does not include the given label id in remove_label_ids' do
         issue.update!(label_ids: [todo.id, inreview.id])
 
-        _, updates = service.execute(content, issue)
+        _, updates, _ = service.execute(content, issue)
 
         expect(updates[:remove_label_ids]).to match_array([todo.id])
       end
@@ -1193,11 +1437,19 @@ describe QuickActions::InterpretService do
       it 'does not remove label ids that are not lists on the board' do
         issue.update!(label_ids: [todo.id, bug.id])
 
-        _, updates = service.execute(content, issue)
+        _, updates, _ = service.execute(content, issue)
 
         expect(updates[:remove_label_ids]).to match_array([todo.id])
       end
 
+      it 'returns board_move message' do
+        issue.update!(label_ids: [todo.id, inprogress.id])
+
+        _, _, message = service.execute(content, issue)
+
+        expect(message).to eq("Moved issue to ~#{inreview.id} column in the board.")
+      end
+
       context 'if the project has multiple boards' do
         let(:issuable) { issue }
 
@@ -1211,13 +1463,13 @@ describe QuickActions::InterpretService do
       context 'if the given label does not exist' do
         let(:issuable) { issue }
         let(:content) { '/board_move ~"Fake Label"' }
-        it_behaves_like 'empty command'
+        it_behaves_like 'empty command', 'Move this issue failed because you need to specify only one label.'
       end
 
       context 'if multiple labels are given' do
         let(:issuable) { issue }
         let(:content) { %{/board_move ~"#{inreview.title}" ~"#{todo.title}"} }
-        it_behaves_like 'empty command'
+        it_behaves_like 'empty command', 'Move this issue failed because you need to specify only one label.'
       end
 
       context 'if the given label is not a list on the board' do
@@ -1292,10 +1544,16 @@ describe QuickActions::InterpretService do
       end
 
       it 'populates create_merge_request with branch_name and issue iid' do
-        _, updates = service.execute(content, issuable)
+        _, updates, _ = service.execute(content, issuable)
 
         expect(updates).to eq(create_merge_request: { branch_name: branch_name, issue_iid: issuable.iid })
       end
+
+      it 'returns the create_merge_request message' do
+        _, _, message = service.execute(content, issuable)
+
+        expect(message).to eq("Created branch '#{branch_name}' and a merge request to resolve this issue")
+      end
     end
   end
 
@@ -1558,6 +1816,12 @@ describe QuickActions::InterpretService do
 
           expect(explanations).to eq(['Creates a branch and a merge request to resolve this issue'])
         end
+
+        it 'returns the execution message using the default branch name' do
+          _, _, message = service.execute(content, issue)
+
+          expect(message).to eq('Created a branch and a merge request to resolve this issue')
+        end
       end
 
       context 'with a branch name' do
@@ -1568,6 +1832,12 @@ describe QuickActions::InterpretService do
 
           expect(explanations).to eq(["Creates branch 'foo' and a merge request to resolve this issue"])
         end
+
+        it 'returns the execution message using the given branch name' do
+          _, _, message = service.execute(content, issue)
+
+          expect(message).to eq("Created branch 'foo' and a merge request to resolve this issue")
+        end
       end
     end
 
diff --git a/spec/support/shared_examples/quick_actions/commit/tag_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/commit/tag_quick_action_shared_examples.rb
index b337a1c18d8..f5a86e4dc2c 100644
--- a/spec/support/shared_examples/quick_actions/commit/tag_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/commit/tag_quick_action_shared_examples.rb
@@ -5,7 +5,7 @@ shared_examples 'tag quick action' do
     it 'tags this commit' do
       add_note("/tag #{tag_name} #{tag_message}")
 
-      expect(page).to have_content 'Commands applied'
+      expect(page).to have_content %{Tagged this commit to #{tag_name} with "#{tag_message}".}
       expect(page).to have_content "tagged commit #{truncated_commit_sha}"
       expect(page).to have_content tag_name
 
diff --git a/spec/support/shared_examples/quick_actions/issuable/close_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/issuable/close_quick_action_shared_examples.rb
index a79a61bc708..6e7eb78261a 100644
--- a/spec/support/shared_examples/quick_actions/issuable/close_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/issuable/close_quick_action_shared_examples.rb
@@ -68,7 +68,7 @@ shared_examples 'close quick action' do |issuable_type|
       it "does not close the #{issuable_type}" do
         add_note('/close')
 
-        expect(page).not_to have_content 'Commands applied'
+        expect(page).not_to have_content "Closed this #{issuable.to_ability_name.humanize(capitalize: false)}."
         expect(issuable).to be_open
       end
     end
diff --git a/spec/support/shared_examples/quick_actions/issue/create_merge_request_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/issue/create_merge_request_quick_action_shared_examples.rb
index 34dba5dbc31..3e9ee9a633f 100644
--- a/spec/support/shared_examples/quick_actions/issue/create_merge_request_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/issue/create_merge_request_quick_action_shared_examples.rb
@@ -2,8 +2,14 @@
 
 shared_examples 'create_merge_request quick action' do
   context 'create a merge request starting from an issue' do
-    def expect_mr_quickaction(success)
-      expect(page).to have_content 'Commands applied'
+    def expect_mr_quickaction(success, branch_name = nil)
+      command_message = if branch_name
+                          "Created branch '#{branch_name}' and a merge request to resolve this issue"
+                        else
+                          "Created a branch and a merge request to resolve this issue"
+                        end
+
+      expect(page).to have_content command_message
 
       if success
         expect(page).to have_content 'created merge request'
@@ -13,19 +19,21 @@ shared_examples 'create_merge_request quick action' do
     end
 
     it "doesn't create a merge request when the branch name is invalid" do
-      add_note("/create_merge_request invalid branch name")
+      branch_name = 'invalid branch name'
+      add_note("/create_merge_request #{branch_name}")
 
       wait_for_requests
 
-      expect_mr_quickaction(false)
+      expect_mr_quickaction(false, branch_name)
     end
 
     it "doesn't create a merge request when a branch with that name already exists" do
-      add_note("/create_merge_request feature")
+      branch_name = 'feature'
+      add_note("/create_merge_request #{branch_name}")
 
       wait_for_requests
 
-      expect_mr_quickaction(false)
+      expect_mr_quickaction(false, branch_name)
     end
 
     it 'creates a new merge request using issue iid and title as branch name when the branch name is empty' do
@@ -46,7 +54,7 @@ shared_examples 'create_merge_request quick action' do
       branch_name = '1-feature'
       add_note("/create_merge_request #{branch_name}")
 
-      expect_mr_quickaction(true)
+      expect_mr_quickaction(true, branch_name)
 
       created_mr = project.merge_requests.last
       expect(created_mr.source_branch).to eq(branch_name)
diff --git a/spec/support/shared_examples/quick_actions/issue/duplicate_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/issue/duplicate_quick_action_shared_examples.rb
index 633c7135fbc..3834b8b2b87 100644
--- a/spec/support/shared_examples/quick_actions/issue/duplicate_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/issue/duplicate_quick_action_shared_examples.rb
@@ -9,7 +9,6 @@ shared_examples 'duplicate quick action' do
         add_note("/duplicate ##{original_issue.to_reference}")
 
         expect(page).not_to have_content "/duplicate #{original_issue.to_reference}"
-        expect(page).to have_content 'Commands applied'
         expect(page).to have_content "marked this issue as a duplicate of #{original_issue.to_reference}"
 
         expect(issue.reload).to be_closed
@@ -28,7 +27,6 @@ shared_examples 'duplicate quick action' do
       it 'does not create a note, and does not mark the issue as a duplicate' do
         add_note("/duplicate ##{original_issue.to_reference}")
 
-        expect(page).not_to have_content 'Commands applied'
         expect(page).not_to have_content "marked this issue as a duplicate of #{original_issue.to_reference}"
 
         expect(issue.reload).to be_open
diff --git a/spec/support/shared_examples/quick_actions/issue/move_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/issue/move_quick_action_shared_examples.rb
index a0b0d888769..85682b4919d 100644
--- a/spec/support/shared_examples/quick_actions/issue/move_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/issue/move_quick_action_shared_examples.rb
@@ -12,7 +12,7 @@ shared_examples 'move quick action' do
       it 'moves the issue' do
         add_note("/move #{target_project.full_path}")
 
-        expect(page).to have_content 'Commands applied'
+        expect(page).to have_content "Moved this issue to #{target_project.full_path}."
         expect(issue.reload).to be_closed
 
         visit project_issue_path(target_project, issue)
@@ -29,7 +29,7 @@ shared_examples 'move quick action' do
 
         wait_for_requests
 
-        expect(page).to have_content 'Commands applied'
+        expect(page).to have_content "Moved this issue to #{project_unauthorized.full_path}."
         expect(issue.reload).to be_open
       end
     end
@@ -40,7 +40,7 @@ shared_examples 'move quick action' do
 
         wait_for_requests
 
-        expect(page).to have_content 'Commands applied'
+        expect(page).to have_content "Move this issue failed because target project doesn't exists"
         expect(issue.reload).to be_open
       end
     end
@@ -56,7 +56,7 @@ shared_examples 'move quick action' do
 
       shared_examples 'applies the commands to issues in both projects, target and source' do
         it "applies quick actions" do
-          expect(page).to have_content 'Commands applied'
+          expect(page).to have_content "Moved this issue to #{target_project.full_path}."
           expect(issue.reload).to be_closed
 
           visit project_issue_path(target_project, issue)
diff --git a/spec/support/shared_examples/quick_actions/merge_request/merge_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/merge_request/merge_quick_action_shared_examples.rb
index c454ddc4bba..ac7c17915de 100644
--- a/spec/support/shared_examples/quick_actions/merge_request/merge_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/merge_request/merge_quick_action_shared_examples.rb
@@ -10,7 +10,7 @@ shared_examples 'merge quick action' do
     it 'merges the MR' do
       add_note("/merge")
 
-      expect(page).to have_content 'Commands applied'
+      expect(page).to have_content 'Scheduled to merge this merge request when the pipeline succeeds.'
 
       expect(merge_request.reload).to be_merged
     end