Add IntelliJ IDEA 2026.1 support

[srizzo]

Summary

• update plugin metadata for IntelliJ IDEA 2026.1 and bump the plugin version to 0.0.20
• upgrade the IntelliJ Platform Gradle plugin to 2.13.1 and align the Qodana image
• include the repository CLAUDE.md guidance file for future Claude Code sessions

Test plan

• ./gradlew build
• ./gradlew verifyPlugin
• Optional sandbox smoke test with ./gradlew runIde

Notes

• Checked the IntelliJ Platform Gradle Plugin release notes for 2.10.5 -> 2.13.1; no required repo changes were needed beyond the version bump for this repository setup.
• Plugin Verifier reports the plugin as compatible with IntelliJ IDEA 2026.1.

🤖 Generated with Claude Code

[github-actions]

Qodana Community for JVM

It seems all right 👌

No new problems were found according to the checks applied

💡 Qodana analysis was run in the pull request mode: only the changed files were checked

View the detailed Qodana report

To be able to view the detailed Qodana report, you can either:

• Register at Qodana Cloud and configure the action
• Use GitHub Code Scanning with Qodana
• Host Qodana report at GitHub Pages
• Inspect and use qodana.sarif.json (see the Qodana SARIF format for details)

To get *.log files or any other Qodana artifacts, run the action with upload-result option set to true,
so that the action will upload the files as the job artifacts:

      - name: 'Qodana Scan'
        uses: JetBrains/qodana-action@v2025.1.1
        with:
          upload-result: true

Contact Qodana team

Contact us at qodana-support@jetbrains.com

• Or via our issue tracker: https://jb.gg/qodana-issue
• Or share your feedback: https://jb.gg/qodana-discussions