150417ffcc1b46401b3d11c151ed6f3566a9c11d
- Add matplotlib>=3.8.0 and seaborn>=0.13.0 to dependencies - Create visualizations.py with 3 plot functions and orchestrator - plot_score_distribution: histogram colored by confidence tier - plot_layer_contributions: bar chart of evidence layer coverage - plot_tier_breakdown: pie chart of tier distribution - Use Agg backend for headless/CLI safety - All plots saved at 300 DPI with proper figure cleanup - 6 tests covering file creation, edge cases, and return values
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Python
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