Craft model-specific prompts optimized for the target checkpoint and identity method. Handles FLUX, SDXL, SD1.5, and Wan video models with proper syntax, quality tags, and negative prompts. Use when generating or refining prompts for ComfyUI workflows.

ComfyUI Prompt Engineer Generates optimized prompts tailored to specific models and identity methods. Different models respond differently to prompts. Model Specific Prompt Rules FLUX.1 (dev/schnell/Kontext) Style : Natural language descriptions work best CFG : 3.5 4 (very low) Quality tags : Minimal FLUX doesn't need "masterpiece, best quality" Length : Medium (50 100 words) Structure : {subject description}, {setting}, {lighting}, {camera/style} Good FLUX prompt: Bad FLUX prompt (too many quality tags): SDXL (RealVisXL, Juggernaut, etc.) Style : Quality tags at front help significantly CFG : 7 9 Quality tags : Include masterpiece, best quality, photorealistic Length : Medium long (50 150 words) Structure : {quality tags}, {trigger word}, {subject}, {details}, {setting}, {style} Weighted syntax : Supported (important:1.3) or ((very important)) Good SDXL prompt: SD 1.5 Style : Tag based works best CFG : 7 8 Quality tags : Essential Length : Shorter (30 80 words) Structure : {quality}, {trigger}, {subject}, {details}, {style tags} Wan 2.1/2.2 (Video) Style : Concise motion descriptions CFG : 5 7 Quality tags : Minimal Length : Short (20 50 words) Focus : Describe the motion, not just the appearance Structure : {subject}, {action/motion}, {setting}, {quality} Good Wan prompt: AnimateDiff Style : Same as base model (SD1.5/SDXL) but add motion keywords Motion keywords : Include camera/subject motion description Length : Same as base model With Identity Methods InstantID Prompts Key adjustments: DO NOT describe specific facial features (the model provides them) DO describe everything else: clothing, pose, setting, lighting Keep CFG at 4 5 PuLID Prompts Key adjustments: Can include some facial descriptions (PuLID is more tolerant) Method "neutral" for realistic, "fidelity" for exact match CFG 5 7 IP Adapter FaceID Key adjustments: Describe the style you want, not the face weight type "style transfer" for 3D→realistic Standard CFG for base model FLUX Kontext (Editing) Key adjustments: Describe the EDIT, not the full image Be specific about what to change Mention what to preserve With Character LoRA Key adjustments: ALWAYS include trigger word first Don't describe features the LoRA has learned Focus on what varies: pose, clothing, setting, lighting Negative Prompt Templates Universal Negative (SDXL/SD1.5) Photorealism Negative Video Negative (Wan/AnimateDiff) FLUX Negative (keep minimal) Prompt Construction Workflow 1. Get character profile from projects/{project}/characters/{name}/profile.yaml 2. Get target model from inventory/user preference 3. Apply model rules from above 4. Add identity method modifiers if applicable 5. Include trigger word if LoRA is being used 6. Draft positive + negative pair 7. Review against past successes in character's generation history 8. Adjust CFG recommendation based on method stack Reference references/prompt templates.md Full template library with examples references/workflows.md CFG and sampler settings per workflow Character profiles in projects/ for trigger words and feature descriptions

comfyui-prompt-engineer