**Root Causes:**
1. Auto-flip logic could create phantom trades if close failed
2. Position size mismatches (0.01 SOL vs 11.92 SOL expected) not caught
3. Multiple trades for same symbol+direction in database
**Preventive Measures:**
1. **Startup Validation (lib/startup/init-position-manager.ts)**
- Validates all open trades against Drift positions on startup
- Auto-closes phantom trades with <50% expected size
- Logs size mismatches for manual review
- Prevents Position Manager from tracking ghost positions
2. **Duplicate Position Prevention (app/api/trading/execute/route.ts)**
- Blocks opening same-direction position on same symbol
- Returns 400 error if duplicate detected
- Only allows auto-flip (opposite direction close + open)
3. **Runtime Phantom Detection (lib/trading/position-manager.ts)**
- Checks position size every 2s monitoring cycle
- Auto-closes if size ratio <50% (extreme mismatch)
- Logs as 'manual' exit with AUTO_CLEANUP tx
- Removes from monitoring immediately
4. **Quality Score Fix (app/api/trading/check-risk/route.ts)**
- Hardcoded minScore=60 (removed non-existent config reference)
**Prevention Summary:**
- ✅ Startup validation catches historical phantoms
- ✅ Duplicate check prevents new phantoms
- ✅ Runtime detection catches size mismatches <30s after they occur
- ✅ All three layers work together for defense-in-depth
Issue: User had LONG (phantom) + SHORT (undersized 0.01 SOL vs 11.92 expected)
Fix: Both detected and closed, bot now clean with 0 active trades
6b1d32a72d