Lint the PR's own diff, not the release branch's divergence from master

[OrangeAndGreen]

Point DEFAULT_BRANCH at github.base_ref so the diff base is the branch the PR actually targets.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 534c8dc3-6fab-4256-9996-1cebb18677e4

📥 Commits

Reviewing files that changed from the base of the PR and between aef4da2 and 20370a4.

📒 Files selected for processing (1)

• .github/workflows/linter.yml

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

The linter workflow now sets DEFAULT_BRANCH from github.base_ref. Super-Linter therefore compares changed files against the pull request’s target branch instead of always comparing against master.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Merge Risk: ⚪ Minimal · up to 20370

This localized workflow change is merge-ready after normal checks and review; no actionable merge-blocking risk remains.

Suggested reviewers: shubham1g5

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description states the implementation change but omits the required technical rationale, safety story, automated test coverage, and Labels and Review information.	Add the required sections from the repository template. Include the ticket or design document, explain the rationale and branch-selection behavior, describe validation and safety considerations, identify automated test coverage, and complet…

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly states the main workflow change and the problem it fixes: linting the pull request diff instead of unrelated divergence from master.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

Full details: Description check

Resolution

Add the required sections from the repository template. Include the ticket or design document, explain the rationale and branch-selection behavior, describe validation and safety considerations, identify automated test coverage, and complete the Labels and Review checklist.

• Fix all pre-merge checks with AI

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-super-linter-diff-base-branch

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 32.95%. Comparing base (bc5cd55) to head (2c46063).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3882      +/-   ##
============================================
- Coverage     33.04%   32.95%   -0.10%     
+ Complexity     5864     5854      -10     
============================================
  Files           999      999              
  Lines         59398    59398              
  Branches       7093     7093              
============================================
- Hits          19628    19573      -55     
- Misses        37528    37586      +58     
+ Partials       2242     2239       -3     

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[shubham1g5]

Great to see this fixed!

Comment on verbosity: we can remove the comment and the complete PR description here as both of them do not provide extra context other than code diff and can be omitted without sacrificing correctness or context.