psalm/psalm.xml

<?xml version="1.0"?>
<psalm
    name="Psalm for Psalm"
    useDocblockTypes="true"
    totallyTyped="true"
    strictBinaryOperands="false"
    rememberPropertyAssignmentsAfterCall="true"
    throwExceptionOnError="false"
>
    <projectFiles>
        <directory name="src" />
        <directory name="tests" />
        <directory name="examples" />
        <ignoreFiles>
            <file name="src/Psalm/CallMap.php" />
            <directory name="src/Psalm/Stubs" />
            <directory name="tests/stubs" />
        </ignoreFiles>
    </projectFiles>

    <issueHandlers>
        <MisplacedRequiredParam errorLevel="suppress" />
        <PossiblyNullOperand errorLevel="suppress" />
        <MissingConstructor errorLevel="suppress" />
        <DeprecatedProperty errorLevel="suppress" />

        <UnusedParam>
            <errorLevel type="suppress">
                <file name="src/Psalm/Plugin.php" />
                <directory name="examples" />
            </errorLevel>
        </UnusedParam>

        <PossiblyUnusedParam>
            <errorLevel type="suppress">
                <file name="src/Psalm/Plugin.php" />
                <directory name="examples" />
            </errorLevel>
        </PossiblyUnusedParam>

        <UnusedClass>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </UnusedClass>

        <UnusedProperty>
            <errorLevel type="info">
                <file name="src/Psalm/FileManipulation/FunctionDocblockManipulator.php" />
            </errorLevel>
        </UnusedProperty>

        <PossiblyUnusedProperty>
            <errorLevel type="info">
                <file name="src/Psalm/Storage/FunctionLikeStorage.php" />
            </errorLevel>
        </PossiblyUnusedProperty>

        <PossiblyUnusedMethod>
            <errorLevel type="suppress">
                <directory name="tests" />
                <file name="src/Psalm/Type/Atomic/GenericTrait.php" />
            </errorLevel>
            <errorLevel type="info">
                <file name="src/Psalm/Codebase.php" />
            </errorLevel>
        </PossiblyUnusedMethod>

        <PropertyNotSetInConstructor>
            <errorLevel type="suppress">
                <directory name="tests" />
                <file name="src/Psalm/Config.php" />
            </errorLevel>
        </PropertyNotSetInConstructor>

        <MixedArgument>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </MixedArgument>

        <MixedOperand>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </MixedOperand>

        <MixedPropertyFetch>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </MixedPropertyFetch>

        <NoInterfaceProperties>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </NoInterfaceProperties>

        <NullArrayAccess>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </NullArrayAccess>

        <NullPropertyFetch>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </NullPropertyFetch>

        <NullArgument>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </NullArgument>

        <PossiblyFalseArgument>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </PossiblyFalseArgument>

        <TypeCoercion>
            <errorLevel type="suppress">
                <directory name="tests" />
            </errorLevel>
        </TypeCoercion>
    </issueHandlers>
</psalm>