Update cudf.pandas skill with recent changes

[galipremsagar]

Description

We recently changes our test plugin, this PR updates and removes old references in SKILL.md.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 7bf0f41b-1ddd-450f-83f5-ca1b55f34115

📥 Commits

Reviewing files that changed from the base of the PR and between a47acc2 and 580adb4.

📒 Files selected for processing (1)

• .agents/skills/debug-cudf-pandas/SKILL.md

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Updated debugging skill docs: clarified test-setup categories, added precise guidance for reusing/refreshing local test checkouts, revised validation and troubleshooting steps to match the plugin-based test harness, explained non-failing "xpass" behavior when strictness is disabled, updated example test invocation and final commit staging instructions, and revised Important Notes.

Walkthrough

This PR updates the debug-cudf-pandas skill doc to reflect the current pandas-testing harness: replace conftest-patch.py references with pandas-testing-plugin.py, add explicit rules for reusing or refreshing the test checkout, and document xfail_strict = false XPASS behavior and stale-marker handling.

Changes

Pandas testing harness workflow documentation

Layer / File(s)	Summary
Workflow overview and setup prerequisites .agents/skills/debug-cudf-pandas/SKILL.md	Overview wording reworded; replaced previous cleanup instructions with explicit guidance for reusing vs refreshing the pandas-testing checkout and precise rm -rf rules.
Main debugging steps: validation and reproduction .agents/skills/debug-cudf-pandas/SKILL.md	Step 0 now targets pandas-testing-plugin.py (describes NODEIDS_THAT_FAIL/NODEIDS_TO_SKIP/NODEIDS_PATHS_TO_SKIP and xfail_strict = false behavior). Step 1 updated to use the current run-pandas-tests.sh invocation and plugin-based troubleshooting flow.
Debugging completion: regression check and commit .agents/skills/debug-cudf-pandas/SKILL.md	Step 5 instructs investigating failures not already listed in pandas-testing-plugin.py. Step 6 updates commit staging guidance to stage python/cudf/cudf/pandas/scripts/pandas-testing-plugin.py for marker removal.
Implementation behavior documentation .agents/skills/debug-cudf-pandas/SKILL.md	Important Notes updated to reflect plugin-based marker application loaded each run, xfail_strict = false XPASS behavior, and removed conftest-patch-specific instructions.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• rapidsai/cudf#22625: Earlier PR that adjusted the same debug-cudf-pandas skill workflow and harness behavior documentation.

Suggested labels

doc

Suggested reviewers

• mroeschke

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title references 'cudf.pandas skill' and 'recent changes' which aligns with the changeset updating SKILL.md documentation to reflect recent test plugin modifications.
Description check	✅ Passed	The description explains that recent test plugin changes prompted updates and removal of old references in SKILL.md, which directly relates to the documentation changes in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[vyasr]

Thanks!

[galipremsagar]

/merge