From 4f250247c949f6859284bc4de63974a6a9d8cf80 Mon Sep 17 00:00:00 2001
From: Josh Chester <numbers@softwaresmyth.com>
Date: Sat, 24 Jan 2026 12:21:00 -0600
Subject: [PATCH] Customize style guide

---
 .gitea/workflows/linting.yml |   2 +-
 style_guide.xml              | 483 +++++++++++++++++++++++++++++++++++
 2 files changed, 484 insertions(+), 1 deletion(-)
 create mode 100644 style_guide.xml

diff --git a/.gitea/workflows/linting.yml b/.gitea/workflows/linting.yml
index 0b6fb23..4bdfb2c 100644
--- a/.gitea/workflows/linting.yml
+++ b/.gitea/workflows/linting.yml
@@ -46,7 +46,7 @@ jobs:
           echo "Changed files:"
           echo "${{ steps.changed-files.outputs.all_changed_files }}"
 
-          java -jar checkstyle-${{ env.CHECKSTYLE_VERSION }}-all.jar -c google_checks.xml -f xml ${{ steps.changed-files.outputs.all_changed_files }} \
+          java -jar checkstyle-${{ env.CHECKSTYLE_VERSION }}-all.jar -c ./style_guide.xml -f xml ${{ steps.changed-files.outputs.all_changed_files }} \
           | reviewdog -f=checkstyle \
           -name="Checkstyle" \
           -reporter="gitea-pr-review" \
diff --git a/style_guide.xml b/style_guide.xml
new file mode 100644
index 0000000..ac75ebc
--- /dev/null
+++ b/style_guide.xml
@@ -0,0 +1,483 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+          "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+          "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+    Checkstyle configuration that checks the Google coding conventions from Google Java Style
+    that can be found at https://google.github.io/styleguide/javaguide.html
+
+    Checkstyle is very configurable. Be sure to read the documentation at
+    http://checkstyle.org (or in your downloaded distribution).
+
+    To completely disable a check, just comment it out or delete it from the file.
+    To suppress certain violations please review suppression filters.
+
+    Authors: Max Vetrenko, Mauryan Kansara, Ruslan Diachenko, Roman Ivanov.
+ -->
+
+<module name="Checker">
+
+  <property name="charset" value="UTF-8"/>
+
+  <property name="severity" value="${org.checkstyle.google.severity}" default="warning"/>
+
+  <property name="fileExtensions" value="java, properties, xml"/>
+  <!-- Excludes all 'module-info.java' files              -->
+  <!-- See https://checkstyle.org/filefilters/index.html -->
+  <module name="BeforeExecutionExclusionFileFilter">
+    <property name="fileNamePattern" value="module\-info\.java$"/>
+  </module>
+
+  <module name="SuppressWarningsFilter"/>
+
+  <!-- https://checkstyle.org/filters/suppressionfilter.html -->
+  <module name="SuppressionFilter">
+    <property name="file" value="${org.checkstyle.google.suppressionfilter.config}"
+           default="checkstyle-suppressions.xml" />
+    <property name="optional" value="true"/>
+  </module>
+
+  <!-- https://checkstyle.org/filters/suppresswithnearbytextfilter.html -->
+  <module name="SuppressWithNearbyTextFilter">
+    <property name="nearbyTextPattern"
+              value="CHECKSTYLE.SUPPRESS\: (\w+) for ([+-]\d+) lines"/>
+    <property name="checkPattern" value="$1"/>
+    <property name="lineRange" value="$2"/>
+  </module>
+
+  <!-- Checks for whitespace                               -->
+  <!-- See http://checkstyle.org/checks/whitespace/index.html -->
+  <module name="FileTabCharacter">
+    <property name="eachLine" value="true"/>
+  </module>
+
+  <module name="LineLength">
+    <property name="fileExtensions" value="java"/>
+    <property name="max" value="100"/>
+    <property name="ignorePattern"
+             value="^package.*|^import.*|href\s*=\s*&quot;[^&quot;]*&quot;|http://|https://|ftp://"/>
+  </module>
+  <!--  Suppression to prevent LineLength Check from flagging lines in Text-blocks -->
+  <module name="SuppressWithPlainTextCommentFilter">
+    <property name="checkFormat" value="LineLength"/>
+    <property name="offCommentFormat" value='^.*"""\s*$'/>
+    <property name="onCommentFormat" value='^\s*"""\s*(?:[,;]|.+)$'/>
+  </module>
+  <module name="TreeWalker">
+    <module name="OuterTypeFilename"/>
+    <module name="MatchXpath">
+      <property name="id" value="singleLineCommentStartWithSpace"/>
+      <property name="query"
+                value="//SINGLE_LINE_COMMENT[./COMMENT_CONTENT[not(starts-with(@text, ' '))
+                       and not(starts-with(@text, '/'))
+                       and not(@text = '\n') and not(ends-with(@text, '//\n'))]]"/>
+      <message key="matchxpath.match" value="''//'' must be followed by a whitespace."/>
+    </module>
+    <module name="IllegalTokenText">
+      <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL, TEXT_BLOCK_CONTENT"/>
+      <property name="format"
+          value="\\u00(09|0(a|A)|0(b|B)|(0|1)(c|C)|(0|1)(d|D)|1(d|D)|1(e|E)|1(f|F)|22|27|5(C|c))|\\u1680|\\u3000|\\u20(00|0(a|A)|28|29|(2|5)(f|F))|\\(0(10|11|12|14|15|40|42|47)|134)"/>
+      <property name="message"
+               value="Consider using special escape sequence instead of octal value or Unicode escaped value."/>
+    </module>
+    <module name="AvoidEscapedUnicodeCharacters">
+      <property name="allowEscapesForControlCharacters" value="true"/>
+      <property name="allowByTailComment" value="true"/>
+      <property name="allowNonPrintableEscapes" value="true"/>
+    </module>
+    <module name="AvoidStarImport"/>
+    <module name="OneTopLevelClass"/>
+    <module name="NoLineWrap">
+      <property name="tokens" value="PACKAGE_DEF, IMPORT, STATIC_IMPORT"/>
+    </module>
+    <module name="NeedBraces">
+      <property name="tokens"
+               value="LITERAL_DO, LITERAL_ELSE, LITERAL_FOR, LITERAL_IF, LITERAL_WHILE"/>
+    </module>
+    <module name="LeftCurly">
+      <property name="id" value="LeftCurlyEol"/>
+      <property name="tokens"
+                value="ANNOTATION_DEF, CLASS_DEF, CTOR_DEF, ENUM_CONSTANT_DEF, ENUM_DEF,
+                    INTERFACE_DEF, LAMBDA, LITERAL_CATCH,
+                    LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF,
+                    LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, METHOD_DEF,
+                    OBJBLOCK, STATIC_INIT, RECORD_DEF, COMPACT_CTOR_DEF"/>
+    </module>
+    <module name="LeftCurly">
+      <property name="id" value="LeftCurlyNl"/>
+      <property name="option" value="nl"/>
+      <property name="tokens"
+                value="LITERAL_CASE, LITERAL_DEFAULT"/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <!-- LITERAL_CASE, LITERAL_DEFAULT are reused in SWITCH_RULE  -->
+      <property name="id" value="LeftCurlyNl"/>
+      <property name="query" value="//SWITCH_RULE/SLIST"/>
+    </module>
+    <module name="RightCurly">
+      <property name="id" value="RightCurlySame"/>
+      <property name="tokens"
+                value="LITERAL_TRY, LITERAL_CATCH, LITERAL_IF, LITERAL_ELSE,
+                    LITERAL_DO"/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <property name="id" value="RightCurlySame"/>
+      <property name="query" value="//RCURLY[parent::SLIST[parent::LITERAL_CATCH
+                               and not(parent::LITERAL_CATCH/following-sibling::*)]]"/>
+    </module>
+    <module name="RightCurly">
+      <property name="id" value="RightCurlyAlone"/>
+      <property name="option" value="alone"/>
+      <property name="tokens"
+               value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT,
+                    INSTANCE_INIT, ANNOTATION_DEF, ENUM_DEF, INTERFACE_DEF, RECORD_DEF,
+                    COMPACT_CTOR_DEF, LITERAL_SWITCH, LITERAL_CASE, LITERAL_FINALLY,
+                    LITERAL_CATCH"/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <!-- suppression is required till https://github.com/checkstyle/checkstyle/issues/7541 -->
+      <property name="id" value="RightCurlyAlone"/>
+      <property name="query" value="//RCURLY[parent::SLIST[count(./*)=1
+                               and not(parent::LITERAL_CATCH)]
+                               or (preceding-sibling::*[last()][self::LCURLY]
+                               and not(parent::SLIST/parent::LITERAL_CATCH))
+                               or (parent::SLIST/parent::LITERAL_CATCH
+                               and parent::SLIST/parent::LITERAL_CATCH/following-sibling::*)]"/>
+    </module>
+    <module name="WhitespaceAfter">
+      <property name="tokens"
+               value="COMMA, SEMI, TYPECAST, ELLIPSIS, LITERAL_YIELD, LITERAL_CASE, ANNOTATIONS"/>
+    </module>
+    <module name="WhitespaceAround">
+      <property name="allowEmptyConstructors" value="true"/>
+      <property name="allowEmptyLambdas" value="true"/>
+      <property name="allowEmptyMethods" value="true"/>
+      <property name="allowEmptyTypes" value="true"/>
+      <property name="allowEmptyLoops" value="true"/>
+      <property name="allowEmptySwitchBlockStatements" value="true"/>
+      <property name="ignoreEnhancedForColon" value="false"/>
+      <property name="tokens"
+               value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR,
+                    BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, DO_WHILE, EQUAL, GE, GT, LAMBDA, LAND,
+                    LCURLY, LE, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY,
+                    LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SWITCH, LITERAL_SYNCHRONIZED,
+                    LITERAL_TRY, LITERAL_WHILE, LOR, LT, MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN,
+                    NOT_EQUAL, PLUS, PLUS_ASSIGN, QUESTION, RCURLY, SL, SLIST, SL_ASSIGN, SR,
+                    SR_ASSIGN, STAR, STAR_ASSIGN, LITERAL_ASSERT,
+                    TYPE_EXTENSION_AND, LITERAL_WHEN"/>
+      <message key="ws.notFollowed"
+              value="WhitespaceAround: ''{0}'' is not followed by whitespace. Empty blocks
+               may only be represented as '{}' when not part of a multi-block statement (4.1.3)"/>
+      <message key="ws.notPreceded"
+              value="WhitespaceAround: ''{0}'' is not preceded with whitespace."/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <property name="checks" value="WhitespaceAround"/>
+      <property name="query" value="//*[self::LITERAL_IF or self::LITERAL_ELSE or
+                                 self::STATIC_INIT]/SLIST[count(./*)=1]
+                                 | //*[self::STATIC_INIT or self::LITERAL_TRY or self::LITERAL_IF]
+                                 //*[self::RCURLY][parent::SLIST[count(./*)=1]]
+                                 | //SLIST[count(./*)=1][parent::LITERAL_TRY and
+                                 not(following-sibling::*)]
+                                 | //SLIST[count(./*)=1][parent::LITERAL_CATCH and
+                                 not(parent::LITERAL_CATCH/following-sibling::*)]"/>
+    </module>
+    <module name="RegexpSinglelineJava">
+      <property name="format" value="\{[ ]+\}"/>
+      <property name="message" value="Empty blocks should have no spaces. Empty blocks
+                                   may only be represented as '{}' when not part of a
+                                   multi-block statement (4.1.3)"/>
+    </module>
+    <module name="OneStatementPerLine"/>
+    <module name="MultipleVariableDeclarations"/>
+    <module name="ArrayTypeStyle"/>
+    <module name="JavadocLeadingAsteriskAlign"/>
+    <module name="JavadocMissingLeadingAsterisk"/>
+    <module name="JavadocContentLocation"/>
+    <module name="MissingSwitchDefault"/>
+    <module name="FallThrough"/>
+    <module name="UpperEll"/>
+    <module name="ModifierOrder"/>
+    <module name="TextBlockGoogleStyleFormatting"/>
+    <module name="EmptyLineSeparator">
+      <property name="tokens"
+               value="PACKAGE_DEF, IMPORT, STATIC_IMPORT, CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+                    STATIC_INIT, INSTANCE_INIT, METHOD_DEF, CTOR_DEF, VARIABLE_DEF, RECORD_DEF,
+                    COMPACT_CTOR_DEF"/>
+      <property name="allowNoEmptyLineBetweenFields" value="true"/>
+      <property name="allowMultipleEmptyLines" value="false"/>
+    </module>
+    <module name="SeparatorWrap">
+      <property name="id" value="SeparatorWrapDot"/>
+      <property name="tokens" value="DOT"/>
+      <property name="option" value="nl"/>
+    </module>
+    <module name="SeparatorWrap">
+      <property name="id" value="SeparatorWrapComma"/>
+      <property name="tokens" value="COMMA"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="SeparatorWrap">
+      <!-- ELLIPSIS is EOL until https://github.com/google/styleguide/issues/259 -->
+      <property name="id" value="SeparatorWrapEllipsis"/>
+      <property name="tokens" value="ELLIPSIS"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="SeparatorWrap">
+      <!-- ARRAY_DECLARATOR is EOL until https://github.com/google/styleguide/issues/258 -->
+      <property name="id" value="SeparatorWrapArrayDeclarator"/>
+      <property name="tokens" value="ARRAY_DECLARATOR"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="SeparatorWrap">
+      <property name="id" value="SeparatorWrapMethodRef"/>
+      <property name="tokens" value="METHOD_REF"/>
+      <property name="option" value="nl"/>
+    </module>
+    <module name="PackageName">
+      <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
+      <message key="name.invalidPattern"
+             value="Package name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="TypeName">
+      <property name="format" value="^[A-Z][a-zA-Z0-9]*(?:[0-9](?:_[0-9]+)*)?$"/>
+      <property name="tokens" value="CLASS_DEF"/>
+      <message key="name.invalidPattern"
+             value="Type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="TypeName">
+      <property name="tokens" value="INTERFACE_DEF, ENUM_DEF,
+                    ANNOTATION_DEF, RECORD_DEF"/>
+      <message key="name.invalidPattern"
+             value="Type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="MemberName">
+      <property name="format"
+        value="^(?![a-z]$)(?![a-z][A-Z])[a-z][a-zA-Z0-9]*(?:_[0-9]+)*$"/>
+      <message key="name.invalidPattern"
+             value="Member name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="ParameterName">
+      <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+      <message key="name.invalidPattern"
+             value="Parameter name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="LambdaParameterName">
+      <property name="format" value="^(_|[a-z]([a-z0-9][a-zA-Z0-9]*)?)$"/>
+      <message key="name.invalidPattern"
+             value="Lambda parameter name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="CatchParameterName">
+      <property name="format" value="^(_|[a-z]([a-z0-9][a-zA-Z0-9]*)?)$"/>
+      <message key="name.invalidPattern"
+             value="Catch parameter name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="LocalVariableName">
+      <property name="format" value="^(_|[a-z]([a-z0-9][a-zA-Z0-9]*)?)$"/>
+      <message key="name.invalidPattern"
+             value="Local variable name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="PatternVariableName">
+      <property name="format" value="^(_|[a-z]([a-z0-9][a-zA-Z0-9]*)?)$"/>
+      <message key="name.invalidPattern"
+             value="Pattern variable name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="ClassTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+             value="Class type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="RecordComponentName">
+      <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+      <message key="name.invalidPattern"
+               value="Record component name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="RecordTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+               value="Record type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="MethodTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+             value="Method type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="InterfaceTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+             value="Interface type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="NoFinalizer"/>
+    <module name="GenericWhitespace">
+      <message key="ws.followed"
+             value="GenericWhitespace ''{0}'' is followed by whitespace."/>
+      <message key="ws.preceded"
+             value="GenericWhitespace ''{0}'' is preceded with whitespace."/>
+      <message key="ws.illegalFollow"
+             value="GenericWhitespace ''{0}'' should followed by whitespace."/>
+      <message key="ws.notPreceded"
+             value="GenericWhitespace ''{0}'' is not preceded with whitespace."/>
+    </module>
+    <module name="Indentation">
+      <property name="basicOffset" value="4"/>
+      <property name="braceAdjustment" value="4"/>
+      <property name="caseIndent" value="4"/>
+      <property name="throwsIndent" value="4"/>
+      <property name="lineWrappingIndentation" value="4"/>
+      <property name="arrayInitIndent" value="2"/>
+    </module>
+
+    <module name="AbbreviationAsWordInName">
+      <property name="ignoreFinal" value="false"/>
+      <property name="allowedAbbreviationLength" value="0"/>
+      <property name="tokens"
+               value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, ANNOTATION_DEF, ANNOTATION_FIELD_DEF,
+                    PARAMETER_DEF, VARIABLE_DEF, METHOD_DEF, PATTERN_VARIABLE_DEF, RECORD_DEF,
+                    RECORD_COMPONENT_DEF"/>
+    </module>
+    <module name="NoWhitespaceBeforeCaseDefaultColon"/>
+    <module name="OverloadMethodsDeclarationOrder"/>
+    <module name="ConstructorsDeclarationGrouping"/>
+    <module name="VariableDeclarationUsageDistance"/>
+    <module name="CustomImportOrder">
+      <property name="sortImportsInGroupAlphabetically" value="true"/>
+      <property name="separateLineBetweenGroups" value="true"/>
+      <property name="customImportOrderRules" value="STATIC###THIRD_PARTY_PACKAGE"/>
+      <property name="tokens" value="IMPORT, STATIC_IMPORT, PACKAGE_DEF"/>
+    </module>
+    <module name="MethodParamPad">
+      <property name="tokens"
+               value="CTOR_DEF, LITERAL_NEW, METHOD_CALL, METHOD_DEF, CTOR_CALL,
+                    SUPER_CTOR_CALL, ENUM_CONSTANT_DEF, RECORD_DEF, RECORD_PATTERN_DEF"/>
+    </module>
+    <module name="NoWhitespaceBefore">
+      <property name="tokens"
+               value="COMMA, SEMI, POST_INC, POST_DEC, DOT,
+                    LABELED_STAT, METHOD_REF, ELLIPSIS"/>
+      <property name="allowLineBreaks" value="true"/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <property name="checks" value="NoWhitespaceBefore"/>
+      <property name="query"
+          value="//ELLIPSIS[preceding-sibling::TYPE/ANNOTATIONS[ANNOTATION[LPAREN]
+              or not(following-sibling::*)]]"/>
+    </module>
+    <module name="ParenPad">
+      <property name="tokens"
+               value="ANNOTATION, ANNOTATION_FIELD_DEF, CTOR_CALL, CTOR_DEF, DOT, ENUM_CONSTANT_DEF,
+                    EXPR, LITERAL_CATCH, LITERAL_DO, LITERAL_FOR, LITERAL_IF, LITERAL_NEW,
+                    LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_WHILE, METHOD_CALL,
+                    METHOD_DEF, QUESTION, RESOURCE_SPECIFICATION, SUPER_CTOR_CALL, LAMBDA,
+                    RECORD_DEF, RECORD_PATTERN_DEF"/>
+    </module>
+    <module name="OperatorWrap">
+      <property name="option" value="NL"/>
+      <property name="tokens"
+               value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR,
+                    LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR, METHOD_REF,
+                    TYPE_EXTENSION_AND "/>
+    </module>
+    <module name="AnnotationLocation">
+      <property name="id" value="AnnotationLocationMostCases"/>
+      <property name="tokens"
+               value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF,
+                      RECORD_DEF, COMPACT_CTOR_DEF, PACKAGE_DEF"/>
+    </module>
+    <module name="AnnotationLocation">
+      <property name="id" value="AnnotationLocationVariables"/>
+      <property name="tokens" value="VARIABLE_DEF"/>
+      <property name="allowSamelineMultipleAnnotations" value="true"/>
+    </module>
+    <module name="MissingOverrideOnRecordAccessor"/>
+    <module name="NonEmptyAtclauseDescription"/>
+    <module name="InvalidJavadocPosition"/>
+    <module name="JavadocTagContinuationIndentation"/>
+    <module name="SummaryJavadoc">
+      <property name="forbiddenSummaryFragments"
+        value="^@return the *|^This method returns |^A [{]@code [a-zA-Z0-9]+[}]( is a )|^[a-z]"/>
+    </module>
+    <module name="JavadocParagraph">
+      <property name="allowNewlineParagraph" value="false"/>
+    </module>
+    <module name="RequireEmptyLineBeforeBlockTagGroup"/>
+    <module name="AtclauseOrder">
+      <property name="tagOrder" value="@param, @return, @throws, @deprecated"/>
+      <property name="target"
+               value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF, VARIABLE_DEF"/>
+    </module>
+    <module name="JavadocMethod">
+      <property name="accessModifiers" value="public"/>
+      <property name="allowMissingParamTags" value="true"/>
+      <property name="allowMissingReturnTag" value="true"/>
+      <property name="allowedAnnotations" value="Override, Test"/>
+      <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF, COMPACT_CTOR_DEF"/>
+    </module>
+    <module name="MissingJavadocMethod">
+      <property name="scope" value="protected"/>
+      <property name="allowMissingPropertyJavadoc" value="true"/>
+      <property name="allowedAnnotations" value="Override, Test"/>
+      <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF,
+                                   COMPACT_CTOR_DEF"/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <property name="checks" value="MissingJavadocMethod"/>
+      <property name="query" value="//*[self::METHOD_DEF or self::CTOR_DEF
+                                 or self::ANNOTATION_FIELD_DEF or self::COMPACT_CTOR_DEF]
+                                 [ancestor::*[self::INTERFACE_DEF or self::CLASS_DEF
+                                 or self::RECORD_DEF or self::ENUM_DEF]
+                                 [not(./MODIFIERS/LITERAL_PUBLIC)]]"/>
+    </module>
+    <module name="MissingJavadocType">
+      <property name="scope" value="protected"/>
+      <property name="tokens"
+                value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+                      RECORD_DEF, ANNOTATION_DEF"/>
+      <property name="excludeScope" value="nothing"/>
+    </module>
+    <module name="MethodName">
+      <property name="format"
+          value="^(?![a-z]$)(?![a-z][A-Z])[a-z][a-z0-9]*(?:[A-Z][a-z0-9]*)*(?:_[0-9]+)*$"/>
+      <message key="name.invalidPattern"
+             value="Method name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="SuppressionXpathSingleFilter">
+      <property name="checks" value="MethodName"/>
+      <property name="query" value="//METHOD_DEF[
+                                     ./MODIFIERS/ANNOTATION//IDENT[contains(@text, 'Test')]
+                                   ]/IDENT"/>
+      <property name="message" value="'[a-z][a-z0-9][a-zA-Z0-9]*(?:_[a-z][a-z0-9][a-zA-Z0-9]*)*'"/>
+    </module>
+    <module name="SingleLineJavadoc"/>
+    <module name="TodoComment">
+      <property name="format" value="^[ \t]*(?!TODO:)(?i:TODO)\b:?"/>
+      <message key="todo.match"
+               value="''TODO:'' must be written in all caps and followed by a colon."/>
+    </module>
+    <module name="EmptyCatchBlock">
+      <property name="commentFormat" value="\w+"/>
+    </module>
+    <module name="CommentsIndentation">
+      <property name="tokens" value="SINGLE_LINE_COMMENT, BLOCK_COMMENT_BEGIN"/>
+    </module>
+    <!-- https://checkstyle.org/filters/suppressionxpathfilter.html -->
+    <module name="SuppressionXpathFilter">
+      <property name="file" value="${org.checkstyle.google.suppressionxpathfilter.config}"
+             default="checkstyle-xpath-suppressions.xml" />
+      <property name="optional" value="true"/>
+    </module>
+    <module name="SuppressWarningsHolder" />
+    <module name="SuppressionCommentFilter">
+      <property name="offCommentFormat" value="CHECKSTYLE.OFF\: ([\w\|]+)" />
+      <property name="onCommentFormat" value="CHECKSTYLE.ON\: ([\w\|]+)" />
+      <property name="checkFormat" value="$1" />
+    </module>
+    <module name="SuppressWithNearbyCommentFilter">
+      <property name="commentFormat" value="CHECKSTYLE.SUPPRESS\: ([\w\|]+)"/>
+      <!-- $1 refers to the first match group in the regex defined in commentFormat -->
+      <property name="checkFormat" value="$1"/>
+      <!-- The check is suppressed in the next line of code after the comment -->
+      <property name="influenceFormat" value="1"/>
+    </module>
+  </module>
+</module>