Add debug-cudf-pandas skill for fixing pandas test compatibility failures

[vyasr]

Description

Adds a skill for debugging cudf.pandas test failures. This skill aims to encode a standardized workflow for failures in a systematic way.

Checklist

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

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[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: 76010c97-0cdb-47cd-9ae7-6ddbdaf76ffd

📥 Commits

Reviewing files that changed from the base of the PR and between 5ca310d and c32d869.

📒 Files selected for processing (1)

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

💤 Files with no reviewable changes (1)

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

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Added a detailed step‑by‑step workflow document covering failure classification, prohibited fix patterns, prerequisites for clean runs, expected input format, investigation and verification flows, commit‑stage guidance, stop conditions, and operational notes for pandas compatibility testing and diagnostics.

Walkthrough

This PR adds a skill documentation file that defines a complete workflow for debugging and fixing pandas test failures under the cuDF.pandas compatibility layer. The documentation covers failure classification, prohibited fix patterns, prerequisites, investigation steps, diagnostic techniques, distinct fix paths for implementation versus proxy bugs, verification procedures, and operational notes.

Changes

Debug cuDF.pandas Skill Definition

Layer / File(s)

Summary

Complete skill definition with purpose, workflow, and implementation guide .agents/skills/debug-cudf-pandas/SKILL.md

Introduces the skill name and purpose, defines prohibited fix patterns and prerequisites, describes the investigation workflow including reproduction and root-cause diagnosis with direct cudf vs pandas comparison and proxy-layer diagnostics, outlines distinct fix paths for cudf implementation bugs versus proxy/dispatch bugs, specifies verification steps and commit-stage instructions, lists stop conditions, and documents operational notes affecting test interpretation and harness behavior.

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and specifically describes the main change: adding a debug skill for pandas test compatibility failures in cudf.pandas.
Description check	✅ Passed	The description clearly relates to the changeset by explaining the purpose of the new skill for standardizing debugging workflows for cudf.pandas test failures.
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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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.agents/skills/debug-cudf-pandas/SKILL.md:
- Line 215: The SKILL.md reference to a non-existent python/CLAUDE.md should be
removed and replaced with the correct guidance: update
.agents/skills/debug-cudf-pandas/SKILL.md to either point to the existing
internal usage or inline the required buffer access pattern, e.g., show the
exact call column.access(mode="read", scope="internal") and/or reference
existing helper usage like access_columns(..., mode="read", scope="internal");
ensure the doc no longer links to python/CLAUDE.md and clearly states the
required buffer access pattern where the current line 215 mentions it.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: a37362ca-e8cd-4557-86e6-bfbb8078019e

📥 Commits

Reviewing files that changed from the base of the PR and between ad987ea and 5ca310d.

📒 Files selected for processing (1)

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

[vyasr]

/merge