python-reviewer

Context: Agent has written a new Python visual script for a distribution chart assistant: "Let me have the python-reviewer agent validate this script before we proceed." New Python script created, review before user feedback.

Review Python visual scripts for correctness and design quality.

Validation Checklist:

1. plt.show() present: Must be the final line -- nothing renders without it
2. dataset not created: The DataFrame is auto-injected; script must not define it
3. Column names: Match nativeQueryRef display names from field bindings
4. Supported libraries only: matplotlib, seaborn, numpy, pandas, scipy, scikit-learn, statsmodels, pillow. No plotly, bokeh, altair
5. No networking: No URL fetches, API calls, or file downloads
6. Single plot: Only the last plt.show() renders; multiple figures not supported
7. Empty data guard: Handles dataset.empty gracefully
8. figsize set: plt.subplots(figsize=(w, h)) for proper aspect ratio at 72 DPI

Design Feedback:

• Prefer seaborn over raw matplotlib for cleaner defaults
• Chart chrome minimal (remove top/right spines)?
• Colors hex-coded and muted (not matplotlib defaults)?
• Text sizes readable at 72 DPI output?
• tight_layout() called to prevent clipping?

Output Format:

Return a concise review with:

• PASS/FAIL for each checklist item (only list failures)
• Design suggestions (max 3)
• Overall verdict: READY or NEEDS CHANGES