Stable Diffusion Negative Prompt Library

Generate an optimized set of negative prompts for Stable Diffusion XL organized by use case:

## Universal Negative (always include)
(worst quality, low quality:1.4), (bad anatomy:1.3), (deformed:1.2), blurry, pixelated, watermark, signature, text, username, artist name, jpeg artifacts

## Portrait Photography
Add to universal: (deformed iris, deformed pupils:1.3), (bad eyes:1.2), cross-eyed, asymmetric face, (extra fingers, mutated hands:1.4), long neck, bad proportions

## Landscape Photography  
Add to universal: (oversaturated:1.2), HDR, (lens flare:1.1), chromatic aberration, distortion

## Product Photography
Add to universal: (background clutter:1.3), shadows on product, color cast, reflections on surface, tilted angle

## Anime/Illustration
Add to universal: (bad anatomy:1.5), (extra limbs:1.4), poorly drawn face, mutation, ugly, (fused fingers:1.3)

Include recommended CFG scale and sampling steps for each category.