LoParkour/config/checkstyle/checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
    "https://checkstyle.org/dtds/configuration_1_3.dtd">

<!--
  Two-tier gate (ratchet):

  * severity="error"  — rules that are at ZERO violations right now. The build
    fails if any of them fires. Strict thresholds live here; they were raised
    from the pre-Task-2 values (MethodLength 80->40, CyclomaticComplexity
    20->15, NestedIfDepth 3->2, ParameterNumber 7->5, MagicNumber and
    FinalLocalVariable promoted from warning to error).

  * severity="warning" — the design-debt backlog: rules that are ON and report
    every violation in build/reports/checkstyle, but do not fail the build
    while their backlog is non-zero. Counts are tracked in TODO.md
    (Задача 2, блок «красный baseline»). When a rule reaches zero violations
    it MUST be flipped to severity="error" in this file.

  suppressions.xml is intentionally empty — never add entries back; fix the
  code or, for a documented intentional pattern, agree on it with the owner.
-->
<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <property name="severity" value="error"/>
    <property name="fileExtensions" value="java"/>

    <module name="BeforeExecutionExclusionFileFilter">
        <property name="fileNamePattern" value=".*[\\/]src[\\/]test[\\/].*"/>
    </module>

    <!-- Max file size: enforces the 200-line-per-file rule (KISS / decoupling). -->
    <module name="FileLength">
        <property name="max" value="200"/>
    </module>

    <module name="SuppressionFilter">
        <property name="file" value="${config_loc}/suppressions.xml"/>
        <property name="optional" value="true"/>
    </module>

    <module name="SuppressWarningsFilter"/>

    <module name="LineLength">
        <property name="max" value="150"/>
        <property name="ignorePattern"
            value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
    </module>

    <module name="TreeWalker">
        <module name="SuppressWarningsHolder"/>

        <module name="MethodLength">
            <property name="max" value="40"/>
            <property name="countEmpty" value="false"/>
            <property name="severity" value="warning"/>
        </module>

        <module name="CyclomaticComplexity">
            <property name="max" value="15"/>
        </module>

        <module name="ParameterNumber">
            <property name="max" value="5"/>
            <property name="severity" value="warning"/>
        </module>

        <module name="ReturnCount">
            <property name="max" value="5"/>
            <property name="severity" value="error"/>
        </module>

        <module name="AvoidStarImport"/>
        <module name="UnusedImports"/>
        <module name="RedundantImport"/>

        <module name="PackageName">
            <property name="format" value="^[a-z]+(\.[a-zA-Z][a-zA-Z0-9]*)*$"/>
        </module>
        <module name="TypeName"/>
        <module name="MethodName"/>
        <module name="MemberName"/>
        <module name="ParameterName"/>
        <module name="LocalVariableName"/>
        <module name="ConstantName">
            <property name="format" value="^log$|^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$"/>
        </module>

        <module name="NeedBraces"/>
        <module name="LeftCurly"/>
        <module name="RightCurly"/>

        <module name="ModifierOrder"/>
        <module name="RedundantModifier"/>
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="StringLiteralEquality"/>
        <module name="DefaultComesLast"/>
        <module name="MultipleVariableDeclarations"/>
        <module name="OneStatementPerLine"/>
        <module name="FallThrough"/>
        <module name="HideUtilityClassConstructor"/>
        <module name="OneTopLevelClass"/>
        <module name="UpperEll"/>
        <module name="ArrayTypeStyle"/>
        <module name="MissingSwitchDefault"/>
        <module name="OuterTypeFilename"/>
        <module name="FinalClass"/>

        <module name="HiddenField">
            <property name="ignoreConstructorParameter" value="true"/>
            <property name="ignoreSetter" value="true"/>
            <property name="severity" value="error"/>
        </module>

        <module name="VisibilityModifier">
            <property name="allowPublicFinalFields" value="true"/>
            <property name="severity" value="error"/>
        </module>

        <module name="EmptyBlock">
            <property name="option" value="text"/>
        </module>
        <module name="EmptyCatchBlock">
            <property name="exceptionVariableName" value="expected|ignore"/>
        </module>

        <module name="EqualsAvoidNull"/>
        <module name="NoFinalizer"/>
        <module name="NoClone"/>
        <module name="PackageDeclaration"/>

        <!-- ============ Complexity and size ============ -->
        <module name="NPathComplexity">
            <property name="max" value="50"/>
            <property name="severity" value="warning"/>
        </module>
        <module name="NestedIfDepth">
            <property name="max" value="2"/>
        </module>
        <module name="NestedForDepth">
            <property name="max" value="2"/>
        </module>
        <module name="NestedTryDepth">
            <property name="max" value="2"/>
        </module>
        <module name="ClassDataAbstractionCoupling">
            <property name="max" value="10"/>
            <property name="severity" value="warning"/>
        </module>
        <module name="ClassFanOutComplexity">
            <property name="max" value="12"/>
            <property name="severity" value="warning"/>
        </module>

        <!-- ============ Safety and reliability ============ -->
        <module name="MagicNumber">
            <property name="ignoreNumbers" value="-1, 0, 1, 2"/>
            <property name="ignoreHashCodeMethod" value="true"/>
            <property name="ignoreAnnotation" value="true"/>
        </module>
        <module name="Regexp">
            <property name="format" value="System\.(out|err)\.print"/>
            <property name="illegalPattern" value="true"/>
            <property name="message" value="Use a logger instead of System.out/err"/>
        </module>
        <module name="Regexp">
            <property name="format" value="\.printStackTrace\(\)"/>
            <property name="illegalPattern" value="true"/>
            <property name="message" value="Use a logger instead of printStackTrace"/>
        </module>
        <module name="IllegalThrows"/>
        <module name="IllegalCatch">
            <property name="illegalClassNames"
                value="java.lang.Exception, java.lang.Throwable, java.lang.RuntimeException"/>
            <property name="severity" value="warning"/>
        </module>

        <!-- ============ Style and maintainability ============ -->
        <module name="EmptyLineSeparator">
            <property name="allowNoEmptyLineBetweenFields" value="true"/>
        </module>
        <module name="WhitespaceAround"/>
        <module name="WhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="MissingOverride"/>
        <module name="MissingDeprecated"/>
        <module name="FinalLocalVariable">
            <property name="validateEnhancedForLoopVariable" value="true"/>
        </module>
    </module>
</module>