D3 Design Centre — Pipeline Rules (MUST FOLLOW)¶

⚠️ CRITICAL RULES — NEVER BREAK¶

1. Prompt Rules¶

❌ NEVER use: "t-shirt", "hat", "mug", "hoodie" in prompts
❌ NEVER use: "mockup", "template", "product photo"
✅ ALWAYS use: "isolated on transparent background"
✅ ALWAYS use: "no backdrop", "no scenery", "no product"
✅ Focus on: pure illustration, graphic design, art

2. Background Removal (CRITICAL)¶

USE rembg (local, free, preserves size)
NEVER use remove.bg API (downsizes to 500×500!)
Command: from rembg import remove; remove(img)
Result: 1024×1024 → 1024×1024 (size preserved)

3. Size Requirements¶

Product	Required Size	Status
T-shirt	4500x5400 px	MANDATORY
Hoodie	4500x4050 px	MANDATORY
Mug	2700x1125 px	MANDATORY
Hat	2400x1600 px	MANDATORY

4. Quality Check (MUST PASS ALL)¶

[ ] Size: width ≥ 4500, height ≥ 5400
[ ] Format: RGBA (not RGB)
[ ] Background: 70%+ edges transparent
[ ] No mockup: no t-shirt frame, no model
[ ] Design centered, not cropped

5. Anti-Duplicate (PER PLATFORM)¶

Check Etsy SEPARATELY from eBay
Same design CAN be on BOTH platforms
Skip ONLY if already on THAT platform

6. Trend Research¶

Check current season themes
Use trending colors and subjects
Avoid saturated/overused designs

PIPELINE STEPS (In Order)¶

1. Trend Research → Get themes
2. Generate Prompts → NO product names
3. AI Generate Image → 1024x1024
4. Remove Background → rembg (preserve size)
5. Quality Check → All 5 checks must pass
6. Resize → 4500x5400 for t-shirts
7. Upload to Printify
8. Publish to Etsy (if not duplicate)
9. Publish to eBay (if not duplicate)
10. Update Registry

ERROR HANDLING¶

If ANY step fails:

Log error
Retry up to 3 times
If still failing, skip design and move to next
Report failure in daily summary

DAILY LIMITS¶

Remove BG: unlimited (rembg local)
Etsy: 40 products/month (free tier)
eBay: 250 products/month (free tier)

SUCCESS METRICS¶

Designs published per day
Quality score (pass rate)
Platform coverage (Etsy + eBay)
Trend relevance score