psalm.xml

<?xml version="1.0"?>
<psalm
    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"
    errorBaseline="psalm-baseline.xml"
    findUnusedCode="false"
    findUnusedPsalmSuppress="true"
    findUnusedBaselineEntry="true"
>
    <projectFiles>
        <directory name="src" />
        <ignoreFiles>
            <directory name="vendor" />
        </ignoreFiles>
    </projectFiles>

    <issueHandlers>
        <LessSpecificReturnType errorLevel="error" />

        <!-- level 3 issues - slightly lazy code writing, but provably low false-negatives -->

        <DeprecatedMethod errorLevel="error" />
        <DeprecatedProperty errorLevel="error" />
        <DeprecatedClass errorLevel="error" />
        <DeprecatedConstant errorLevel="error" />
        <DeprecatedFunction errorLevel="error" />
        <DeprecatedInterface errorLevel="error" />
        <DeprecatedTrait errorLevel="error" />

        <InternalMethod errorLevel="error" />
        <InternalProperty errorLevel="error" />
        <InternalClass errorLevel="error" />

        <MissingClosureReturnType errorLevel="error" />
        <MissingReturnType errorLevel="error" />
        <MissingPropertyType errorLevel="error" />
        <InvalidDocblock errorLevel="error" />

        <PropertyNotSetInConstructor errorLevel="error" />
        <MissingConstructor errorLevel="error" />
        <MissingClosureParamType errorLevel="error" />
        <MissingParamType errorLevel="error" />

        <RedundantCondition errorLevel="error" />

        <DocblockTypeContradiction errorLevel="error" />
        <RedundantConditionGivenDocblockType errorLevel="error" />

        <UnresolvableInclude errorLevel="error" />

        <RawObjectIteration errorLevel="error" />

        <InvalidStringClass errorLevel="error" />
    </issueHandlers>
</psalm>