diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..1db48bb
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,60 @@
+# MIT License
+#
+# Copyright (c) 2024 Zerocracy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+---
+AllCops:
+  Exclude:
+    - 'vendor/**/*'
+  DisplayCopNames: true
+  TargetRubyVersion: 3.2
+  SuggestExtensions: false
+  NewCops: enable
+
+Naming/FileName:
+  Regex: !ruby/regexp '/^[a-z-._]*$/'
+Style/GlobalVars:
+  Enabled: false
+Metrics/MethodLength:
+  Enabled: false
+Lint/NestedMethodDefinition:
+  Enabled: false
+Gemspec/RequiredRubyVersion:
+  Enabled: false
+Style/ClassAndModuleChildren:
+  Enabled: false
+Layout/MultilineMethodCallIndentation:
+  Enabled: false
+Metrics/AbcSize:
+  Enabled: false
+Metrics/BlockLength:
+  Enabled: false
+Metrics/CyclomaticComplexity:
+  Enabled: false
+Metrics/ClassLength:
+  Enabled: false
+Metrics/PerceivedComplexity:
+  Enabled: false
+Layout/EmptyLineAfterGuardClause:
+  Enabled: false
+Layout/CaseIndentation:
+  Enabled: false
+Naming/MethodParameterName:
+  MinNameLength: 2
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..90cca91
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+# MIT License
+#
+# Copyright (c) 2024 Zerocracy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+source 'https://rubygems.org'
+
+gem 'fbe', '~>0.0'
+gem 'judges', '~>0.8'
+gem 'rake', '13.2.1'
+gem 'rubocop', '1.64.1'
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..cc1599d
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,157 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    ast (2.4.2)
+    backtrace (0.4.0)
+    concurrent-ruby (1.3.3)
+    decoor (0.0.1)
+    ethon (0.16.0)
+      ffi (>= 1.15.0)
+    factbase (0.0.56)
+      backtrace (~> 0.3)
+      decoor (~> 0.0)
+      json (~> 2.7)
+      loog (~> 0.2)
+      nokogiri (~> 1.10)
+      others (~> 0.0)
+      tago (~> 0.0)
+      yaml (~> 0.3)
+    faraday (2.9.2)
+      faraday-net_http (>= 2.0, < 3.2)
+    faraday-http-cache (2.5.1)
+      faraday (>= 0.8)
+    faraday-multipart (1.0.4)
+      multipart-post (~> 2)
+    faraday-net_http (3.1.0)
+      net-http
+    faraday-retry (2.2.1)
+      faraday (~> 2.0)
+    fbe (0.0.3)
+      backtrace (~> 0.3)
+      decoor (~> 0.0)
+      factbase (~> 0.0)
+      faraday (~> 2.9)
+      faraday-http-cache (~> 2.5)
+      faraday-multipart (~> 1.0)
+      faraday-retry (~> 2.2)
+      judges (~> 0.0)
+      loog (~> 0.2)
+      obk (~> 0.0)
+      octokit (~> 9.1.0)
+      others (~> 0.0)
+      verbose (~> 0.0)
+    ffi (1.17.0-aarch64-linux-gnu)
+    ffi (1.17.0-aarch64-linux-musl)
+    ffi (1.17.0-arm-linux-gnu)
+    ffi (1.17.0-arm-linux-musl)
+    ffi (1.17.0-arm64-darwin)
+    ffi (1.17.0-x86-linux-gnu)
+    ffi (1.17.0-x86-linux-musl)
+    ffi (1.17.0-x86_64-darwin)
+    ffi (1.17.0-x86_64-linux-gnu)
+    ffi (1.17.0-x86_64-linux-musl)
+    gli (2.21.1)
+    iri (0.8.0)
+    json (2.7.2)
+    judges (0.13.3)
+      backtrace (~> 0.3)
+      concurrent-ruby (~> 1.2)
+      factbase (~> 0.0)
+      gli (~> 2.21)
+      iri (~> 0.8)
+      loog (~> 0.2)
+      moments (~> 0.3)
+      nokogiri (~> 1.10)
+      others (~> 0.0)
+      retries (~> 0.0)
+      tago (~> 0.0)
+      typhoeus (~> 1.3)
+    language_server-protocol (3.17.0.3)
+    loog (0.5.2)
+    moments (0.3.0)
+    multipart-post (2.4.1)
+    net-http (0.4.1)
+      uri
+    nokogiri (1.16.6-aarch64-linux)
+      racc (~> 1.4)
+    nokogiri (1.16.6-arm-linux)
+      racc (~> 1.4)
+    nokogiri (1.16.6-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.16.6-x86-linux)
+      racc (~> 1.4)
+    nokogiri (1.16.6-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.16.6-x86_64-linux)
+      racc (~> 1.4)
+    obk (0.3.1)
+    octokit (9.1.0)
+      faraday (>= 1, < 3)
+      sawyer (~> 0.9)
+    others (0.0.3)
+    parallel (1.25.1)
+    parser (3.3.3.0)
+      ast (~> 2.4.1)
+      racc
+    public_suffix (6.0.0)
+    racc (1.8.0)
+    rainbow (3.1.1)
+    rake (13.2.1)
+    regexp_parser (2.9.2)
+    retries (0.0.5)
+    rexml (3.3.1)
+      strscan
+    rubocop (1.64.1)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.31.3)
+      parser (>= 3.3.1.0)
+    ruby-progressbar (1.13.0)
+    sawyer (0.9.2)
+      addressable (>= 2.3.5)
+      faraday (>= 0.17.3, < 3)
+    strscan (3.1.0)
+    tago (0.0.2)
+    typhoeus (1.4.1)
+      ethon (>= 0.9.0)
+    unicode-display_width (2.5.0)
+    uri (0.13.0)
+    verbose (0.0.2)
+      loog (~> 0.2)
+      tago (~> 0.0)
+    yaml (0.3.0)
+
+PLATFORMS
+  aarch64-linux
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86-linux
+  x86-linux-gnu
+  x86-linux-musl
+  x86_64-darwin
+  x86_64-linux
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  fbe (~> 0.0)
+  judges (~> 0.8)
+  rake (= 13.2.1)
+  rubocop (= 1.64.1)
+
+BUNDLED WITH
+   2.5.6
diff --git a/Makefile b/Makefile
index 46eaaa5..756f5be 100644
--- a/Makefile
+++ b/Makefile
@@ -26,9 +26,6 @@
 .SHELLFLAGS := -e -o pipefail -c
 SHELL := bash
 
-JUDGES_VERSION=0.13.1
-FACTBASE_VERSION=0.0.55
-
 YAMLS = $(wildcard tests/*.yml)
 FBS = $(subst tests/,target/fb/,${YAMLS:.yml=.fb})
 HTMLS = $(subst fb/,html/,${FBS:.fb=.html})
@@ -68,8 +65,7 @@ $(SAXON): | target
 	wget --no-verbose -O $(SAXON) https://repo.maven.apache.org/maven2/net/sf/saxon/Saxon-HE/9.8.0-5/Saxon-HE-9.8.0-5.jar
 
 install: $(SAXON) | target
-	gem install factbase:$(FACTBASE_VERSION)
-	gem install judges:$(JUDGES_VERSION)
+	bundle update
 	npm --no-color install -g sass@1.77.2
 
 $(DIRS):
diff --git a/Rakefile.rb b/Rakefile.rb
new file mode 100644
index 0000000..741acc8
--- /dev/null
+++ b/Rakefile.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+# MIT License
+#
+# Copyright (c) 2024 Zerocracy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+require 'rubygems'
+require 'rake'
+require 'rake/clean'
+
+task default: %i[clean test judges rubocop]
+
+require 'rake/testtask'
+desc 'Run all unit tests'
+Rake::TestTask.new(:test) do |test|
+  test.libs << 'lib' << 'test'
+  test.pattern = 'test/**/test_*.rb'
+  test.warning = true
+  test.verbose = false
+end
+
+desc 'Test all judges'
+task :judges do
+  live = ARGV.include?('--live') ? '' : '--disable live'
+  sh "judges --verbose test #{live} --no-log judges"
+end
+
+require 'rubocop/rake_task'
+desc 'Run RuboCop on all directories'
+RuboCop::RakeTask.new(:rubocop) do |task|
+  task.fail_on_error = true
+end
diff --git a/action.yml b/action.yml
index ab5ec92..a22adfa 100644
--- a/action.yml
+++ b/action.yml
@@ -29,6 +29,7 @@ inputs:
   verbose:
     description: 'Log as much debug information as possible'
     required: false
+    default: false
   output:
     description: 'Directory path with YAML, XML, JSON and other files generated'
     required: false
@@ -36,4 +37,4 @@ inputs:
   factbase:
     description: 'Path of the factbase file'
     required: true
-    default: 'recent.fb'
+    default: 'default.fb'
diff --git a/entry.sh b/entry.sh
index 4a0c950..f46d507 100755
--- a/entry.sh
+++ b/entry.sh
@@ -66,6 +66,8 @@ for f in yaml xml json; do
     "${JUDGES}" "${gopts[@]}" print --format "${f}" "${INPUT_FACTBASE}" "${INPUT_OUTPUT}/${name}.${f}"
 done
 
+"${JUDGES}" "${gopts[@]}" update "${INPUT_FACTBASE}" "${SELF}/judges/"
+
 # Build a summary HTML.
 css=$(cat "${SELF}/target/css/main.css")
 java -jar "${SELF}/target/saxon.jar" \
diff --git a/judges/add-user-names/add-user-name.rb b/judges/add-user-names/add-user-name.rb
new file mode 100644
index 0000000..438af0d
--- /dev/null
+++ b/judges/add-user-names/add-user-name.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+# MIT License
+#
+# Copyright (c) 2024 Zerocracy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+require 'fbe/octo'
+require 'fbe/conclude'
+
+Fbe.conclude do
+  on '(and (exists who) (not (exists who_name)))'
+  consider do |f|
+    f.who_name = Fbe.octo.user_name_by_id(f.who)
+  end
+end
diff --git a/judges/add-user-names/fake-names.yml b/judges/add-user-names/fake-names.yml
new file mode 100644
index 0000000..0111bf8
--- /dev/null
+++ b/judges/add-user-names/fake-names.yml
@@ -0,0 +1,36 @@
+# MIT License
+#
+# Copyright (c) 2024 Zerocracy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+---
+options:
+  testing: true
+input:
+  -
+    _id: 11
+    what: bug-was-resolved
+    who: 4444
+    issue: 42
+    repository: 100
+    when: 2024-01-01T03:15:45Z
+expected:
+  - /fb[count(f)=1]
+  - /fb/f[who='4444']
+  - /fb/f[who_name='yegor256']
diff --git a/tests/simple.yml b/tests/simple.yml
index 573a5af..c6b0111 100644
--- a/tests/simple.yml
+++ b/tests/simple.yml
@@ -23,18 +23,18 @@
 -
   time: 2024-05-18T22:22:22.8492Z
   award: 15
-  payee: yegor256
+  who: 526301
   reason: for being a good boy
   href: https://github.com/yegor256/judges/issues/111
 -
   time: 2024-05-15T22:22:22.8492Z
   award: -24
-  payee: yegor256
+  who: 6305016
   reason: for being a bad boy
   href: https://github.com/yegor256/judges/issues/111
 -
   time: 2024-05-15T22:22:22.8492Z
   award: 55
-  payee: torvalds
+  who: 6305016
   reason: for new release
   href: https://github.com/yegor256/judges/issues/111
diff --git a/xsl/awards.xsl b/xsl/awards.xsl
index 75718c0..84bc360 100644
--- a/xsl/awards.xsl
+++ b/xsl/awards.xsl
@@ -68,10 +68,10 @@ SOFTWARE.
         </tr>
       </thead>
       <tbody>
-        <xsl:for-each-group select="f[payee and award]" group-by="payee">
+        <xsl:for-each-group select="f[who and award]" group-by="who">
           <xsl:sort select="sum(award)" data-type="number" order="descending"/>
           <xsl:call-template name="programmer">
-            <xsl:with-param name="name" select="payee/text()"/>
+            <xsl:with-param name="name" select="who/text()"/>
           </xsl:call-template>
         </xsl:for-each-group>
       </tbody>
@@ -101,7 +101,7 @@ SOFTWARE.
           </a>
         </span>
         <xsl:text> (</xsl:text>
-        <xsl:variable name="c" select="count(/fb/f[payee=$name and award]/award)"/>
+        <xsl:variable name="c" select="count(/fb/f[who=$name and award]/award)"/>
         <a href="" onclick="$('.p_{$name}').show(); return false;">
           <xsl:value-of select="$c"/>
           <xsl:text> award</xsl:text>
@@ -112,13 +112,13 @@ SOFTWARE.
         <xsl:text>)</xsl:text>
       </td>
       <td class="right">
-        <xsl:value-of select="z:award(sum(/fb/f[payee=$name and award]/award))"/>
+        <xsl:value-of select="z:award(sum(/fb/f[who=$name and award]/award))"/>
       </td>
       <td>
         <xsl:text> </xsl:text>
       </td>
     </tr>
-    <xsl:for-each select="/fb/f[payee=$name and award]">
+    <xsl:for-each select="/fb/f[who=$name and award]">
       <tr class="p_ p_{$name}" style="display: none;">
         <td>
           <xsl:text> </xsl:text>