Add CodeRabbit pre-merge checks for upstream change validation

[sbouchet]

What does this PR do?

follow-up of #672

Added pre-merge check for rebase rules

What issues does this PR fix?

related to eclipse-che/che#23749

How to test this PR?

Does this PR contain changes that override default upstream Code-OSS behavior?

• the PR contains changes in the code folder (you can skip it if your changes are placed in a che extension )
• the corresponding items were added to the CHANGELOG.md file
• rules for automatic git rebase were added to the .rebase folder

Summary by CodeRabbit

• Chores
  • Strengthened pre-merge checks to require accompanying rebase artifacts, a changelog entry, and conflict-routing updates when core code changes are present.
  • Minor cleanup: removed an extraneous trailing space in configuration text.

[github-actions]

Click here to review and test in web IDE:

[coderabbitai]

Warning

Ignoring CodeRabbit configuration file changes. For security, only the configuration from the base branch is applied for open source repositories.

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: dcf46f92-e01e-444d-9058-b1368ced46aa

📥 Commits

Reviewing files that changed from the base of the PR and between ad17482 and cb3cb09.

📒 Files selected for processing (1)

• .coderabbit.yaml

🚧 Files skipped from review as they are similar to previous changes (1)

• .coderabbit.yaml

---

📝 Walkthrough

Walkthrough

Updated .coderabbit.yaml: removed trailing space in tone_instructions and added a new reviews.pre_merge_checks configuration. Introduced a custom_checks rule named “Rebase rules for upstream changes” (mode: error) that fails PRs which modify files under code/ (excluding code/extensions/che-*/** and lock files) unless the PR also updates matching .rebase/ rule files, includes a .rebase/CHANGELOG.md entry, and updates rebase.sh conflict-routing for the new rules. The check defines explicit PASS/FAIL conditions based on presence of code/ changes and corresponding rebase artifacts.

Sequence Diagram(s)

(Section intentionally omitted.)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Coderabbit tweaks #672: Modifies .coderabbit.yaml base settings; related because this PR extends that configuration with a new pre-merge check.
• fix rebase rules leftovers after #666 merge #667: Changes files under .rebase/; directly related to the new enforcement requiring .rebase/ updates when code/ is modified.

Suggested reviewers

• azatsarynnyy
• vitaliy-guliy
• rgrunber

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding CodeRabbit pre-merge checks for upstream change validation, which matches the addition of the reviews.pre_merge_checks configuration with the 'Rebase rules for upstream changes' custom check.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[github-actions]

Pull Request images published ✨

Editor amd64: quay.io/che-incubator-pull-requests/che-code:pr-678-amd64
Editor arm64: quay.io/che-incubator-pull-requests/che-code:pr-678-arm64
Dev image: quay.io/che-incubator-pull-requests/che-code-dev:pr-678-dev-amd64

[github-actions]

Pull Request images published ✨

Editor amd64: quay.io/che-incubator-pull-requests/che-code:pr-678-amd64
Editor arm64: quay.io/che-incubator-pull-requests/che-code:pr-678-arm64
Dev image: quay.io/che-incubator-pull-requests/che-code-dev:pr-678-dev-amd64