psalm.xml

<?xml version="1.0"?>
<psalm
        errorLevel="2"
        resolveFromConfigFile="true"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="https://getpsalm.org/schema/config"
        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
>
    <projectFiles>
        <directory name="src" />
        <ignoreFiles>
            <directory name="vendor" />
        </ignoreFiles>

    </projectFiles>

    <issueHandlers>

        <UnnecessaryVarAnnotation>
            <errorLevel type="suppress">
                <file name="src/HttpExceptionResponseDevPlugin.php"/>
            </errorLevel>
        </UnnecessaryVarAnnotation>

        <ArgumentTypeCoercion>
            <errorLevel type="info">
                <file name="src/Exception/FlattenException.php"/>
            </errorLevel>
        </ArgumentTypeCoercion>

        <UnsafeInstantiation>
            <errorLevel type="info">
                <file name="src/Exception/FlattenException.php"/>
            </errorLevel>
        </UnsafeInstantiation>

        <UnresolvableInclude>
            <errorLevel type="suppress">
                <file name="src/Business/Exception/Renderer/HtmlRenderer.php"/>
            </errorLevel>
        </UnresolvableInclude>

        <InternalMethod>
            <errorLevel type="info">
                <file name="src/Exception/FlattenException.php"/>
                <file name="src/Business/Exception/Renderer/RendererFactory.php"/>
                <file name="src/Business/Executor/HttpExceptionPageExecutorDecorator.php"/>
            </errorLevel>
        </InternalMethod>

        <PossiblyInvalidArgument>
            <errorLevel type="info">
                <file name="src/Exception/FlattenException.php"/>
            </errorLevel>
        </PossiblyInvalidArgument>

        <MissingConstructor>
            <errorLevel type="suppress">
                <file name="src/HttpExceptionResponseDevPlugin.php"/>
                <file name="src/Exception/FlattenException.php"/>
            </errorLevel>
        </MissingConstructor>

        <ImplementedReturnTypeMismatch>
            <errorLevel type="suppress">
                <file name="src/HttpExceptionResponseDevPlugin.php"/>
            </errorLevel>
        </ImplementedReturnTypeMismatch>
    </issueHandlers>

</psalm>