<section name="Release 12.3.0">

<div class="releaseDate">13.12.2025</div>

<p>New:</p>

<ul>

<li>

IllegalImport: new property illegalModules to cover module imports.

Author: stoyanK7

<a href="https://github.com/checkstyle/checkstyle/issues/18207">#18207</a>

</li>

<li>

Google-style: New Check TextBlockGoogleStyleFormattingCheck.

Author: Mohit-Sharma

<a href="https://github.com/checkstyle/checkstyle/issues/17223">#17223</a>

</li>

</ul>

<p>Bug fixes:</p>

<ul>

<li>

Google style checks should allow `_` keyword for anonymous variables.

Author: vivek-0509

<a href="https://github.com/checkstyle/checkstyle/issues/18283">#18283</a>

</li>

</ul>

<p>Notes:</p>

<ul>

<li>

Update `JavadocCommentsTokenTypes.java` to new format of AST print.

Author: Aman Baliyan, mahfouz72, Monu Chaudhary, Jiya Gupta, Suryanshu Agrawal, vishalup29

<a href="https://github.com/checkstyle/checkstyle/issues/17882">#17882</a>

</li>

<li>

Clone `apache/kafka` once KAFKA-19809 is merged.

Author: stoyanK7

<a href="https://github.com/checkstyle/checkstyle/issues/18272">#18272</a>

</li>

<li>

Add Kakfa project into Checkstyle regression suite.

Author: stoyanK7

<a href="https://github.com/checkstyle/checkstyle/issues/16003">#16003</a>

</li>

<li>

use new nio jdk api instead of all api.

Author: ivanmalutin

<a href="https://github.com/checkstyle/checkstyle/issues/16155">#16155</a>

</li>

<li>

Recfactor classes to avoid CT_CONSTRUCTOR_THROW violation.

Author: vivek-0509

<a href="https://github.com/checkstyle/checkstyle/issues/14122">#14122</a>

</li>

<li>

uncliear error message if basedir is Linux based but execution is on windows.

Author: vivek-0509

<a href="https://github.com/checkstyle/checkstyle/issues/17951">#17951</a>

</li>

<li>

test to check indentation trailing comments are vertically aligned.

Author: Monu Chaudhary

<a href="https://github.com/checkstyle/checkstyle/issues/17128">#17128</a>

</li>

<li>

infra: Fixing ECJ&#39;s version to be pinned, rather than being dynamic to not break CI

pipelines.

Author: aclfe

<a href="https://github.com/checkstyle/checkstyle/issues/18253">#18253</a>

</li>

<li>

Website Generation doesn&#39;t automatically reflect new changes to checks.xml and

checks/&lt;type&gt;/index.xml.

Author: smita_1078

<a href="https://github.com/checkstyle/checkstyle/issues/17691">#17691</a>

</li>

<li>

Define violation messages for all violations.

Author: aclfe

<a href="https://github.com/checkstyle/checkstyle/issues/15456">#15456</a>

</li>

<li>

checkstyle-12.2.0: fails 2 checks building from source code.

Author: aclfe

<a href="https://github.com/checkstyle/checkstyle/issues/18221">#18221</a>

</li>

<li>

Xdoc marco to put version in xdoc from &#39;since&#39; javadoc tag on Check.

Author: stoyanK7

<a href="https://github.com/checkstyle/checkstyle/issues/18218">#18218</a>

</li>

<li>

CI: verify-no-exception-configs should actually check contribution PR to append the

same Check.

Author: stoyanK7

<a href="https://github.com/checkstyle/checkstyle/issues/7304">#7304</a>

</li>

<li>

Resolve Pitest Suppressions - main.

Author: vivek-0509

<a href="https://github.com/checkstyle/checkstyle/issues/18026">#18026</a>

</li>

<li>

Resolve Pitest Suppressions - ant.

Author: vivek-0509

<a href="https://github.com/checkstyle/checkstyle/issues/18027">#18027</a>

</li>

<li>

doc: note UnusedImports limitation for module import declarations.

Author: stoyanK7

</li>

</ul>

</section>