fix(loadout): convert ammo units to PEC correctly (1 ammo = 0.01 PEC)

- Ammo Burn from API is in ammo units, not PEC
- 1 ammo = 0.01 PEC = 0.0001 PED
- Was treating 848 ammo as 848 PEC (WRONG)
- Now correctly: 848 ammo = 8.48 PEC
- Fixes cost calculation: 30,552 PED/hr → ~330 PED/hr

docs/ATTACHMENT_MECHANICS.md

@@ -0,0 +1,134 @@
+# Entropia Universe Attachment Mechanics - Technical Breakdown
+
+**Source:** Domain expert knowledge from user (@ImpulsiveFPS)  
+**Date:** 2026-02-09
+
+---
+
+## 1. Amplifiers (Amps)
+
+**Most common attachment for damage increase.**
+
+### Mechanics:
+- **Additional Damage:** Added to weapon's base damage
+- **Cost Per Shot:** Increases SIGNIFICANTLY
+  - Pay weapon's normal ammo/decay PLUS amplifier decay
+- **Economy:** Amp is "Eco" only if weapon Efficiency remains high
+
+### Strategic Use:
+- Higher DPS = kill faster = less time mob hits you
+- Saves money on armor decay and healing
+- Most players use amps for speed, not efficiency
+
+---
+
+## 2. Sights & Scopes
+
+**"Skill-based" attachments.**
+
+### Mechanics:
+- **Stats:** Aiming/Skill Increase Bonus + Zoom
+- **High-end versions:** Critical Hit Chance or Critical Damage bonuses
+- **Cost Per Shot:** Increases SLIGHTLY
+  - No ammo cost
+  - Decay (lose value) every trigger pull
+
+### Economy Analysis:
+- "Standard" scopes provide ~0.1% efficiency boost
+- **Veteran advice:** Don't use basic ones - decay cost outweighs tiny accuracy benefit
+- Only use if trying to "skill up" faster
+
+---
+
+## 3. Absorbers (Deterioration Absorbers)
+
+**Overlooked by beginners - protects weapon durability.**
+
+### Examples:
+- ArMatrix Extender series
+
+### Mechanics:
+- **What they do:** "Absorb" percentage of weapon's decay
+- **Stats:** No damage or accuracy - strictly protect durability
+- **Cost Per Shot:** Technically NEUTRAL or CHEAPER
+  - Absorber decays, but prevents gun from decaying
+
+### Strategic Use:
+- Use on Limited (L) weapons with high "Markup"
+- Makes expensive guns last longer
+- Saves money long-term on high-markup weapons
+
+---
+
+## 4. Enhancers ("Slot" Attachments)
+
+**High-risk, high-reward attachments.**
+
+### Types:
+- Damage Enhancer
+- Economy Enhancer
+- Range Enhancer
+- etc.
+
+### Mechanics:
+- **Stats:** Massive boosts (+10% Damage, -1% Weapon Decay)
+- **Cost Per Shot:** HIGH RISK
+  - Don't just decay - have RANDOM CHANCE TO BREAK and disappear completely
+
+### Strategic Use:
+- Only recommended for HIGH-LEVEL hunting
+- "Killing it before it kills you" survival strategy
+- Not for casual/beginner hunters
+
+---
+
+## Important Note: Sights Stacking
+
+**Weapons can have multiple sights:**
+- Weapon can have a sight
+- Scope can ALSO have a sight
+- **Maximum:** 2 sights possible (weapon + scope)
+
+---
+
+## Cost Calculation Formula (Correct)
+
+### Base Weapon Cost Per Shot:
+```
+Cost = (weapon_decay_pec + weapon_ammo_pec) / 100  # PED
+```
+
+### With Amplifier:
+```
+Cost = (weapon_decay_pec + weapon_ammo_pec + amp_decay_pec) / 100
+```
+
+### With Scope:
+```
+Cost = (weapon_decay_pec + weapon_ammo_pec + scope_decay_pec) / 100
+# (ammo cost unchanged)
+```
+
+### With Absorber:
+```
+Weapon decay prevented = weapon_decay_pec × absorption_rate
+Net cost = (weapon_decay_pec × (1 - absorption_rate) + absorber_decay_pec + weapon_ammo_pec) / 100
+```
+
+### With Enhancer:
+```
+Base cost + enhancer_decay
+# Plus risk of total enhancer loss (breakage)
+```
+
+---
+
+## Implementation Notes for Lemontropia Suite
+
+1. **Amp Cost:** Add amp_decay_pec to every shot cost
+2. **Scope Cost:** Add scope_decay_pec (no ammo impact)
+3. **Absorber:** Reduce weapon decay by absorption %, add absorber decay
+4. **Enhancer:** Add decay + implement breakage chance mechanic
+5. **Double Sights:** Support weapon sight + scope sight combination
+
+**Key Insight:** Amps increase DPS but cost more per shot. Scopes/Absorbers are situational. Enhancers are high-risk endgame.

memory/2026-02-09.md

@@ -0,0 +1,83 @@
+# 2026-02-09 - Sprint 2 Phase 2 Complete + Agent Swarm Build
+
+## Session Summary
+
+**Time:** 09:00 - 09:45 UTC  
+**Commits:** 15+ including agent swarm builds  
+**Status:** Core hunting system functional, calculations need refinement
+
+## What Was Built
+
+### ✅ COMPLETED - Agent Swarm (3 parallel agents)
+
+**Agent 1: Loadout Manager v2.0**
+- Full Nexus API integration (3,099 weapons, 1,985 armors, 106 finders)
+- Attachment system: Amplifiers, Scopes, Absorbers, Armor Platings
+- Weapon/Armor/Attachment selectors with real data
+- Complete cost calculations (weapon + armor + attachments + healing)
+- NEW: `ui/attachment_selector.py` (678 lines)
+
+**Agent 2: Armor Decay Tracking**
+- When player takes damage → armor decay cost calculated
+- Added to HUD total cost automatically
+- Uses real armor decay from Nexus API
+
+**Agent 3: Healing Cost** (partial)
+- Healing tools selection in Loadout Manager
+- Cost per heal tracking
+
+### ✅ HUD Enhancements
+- Cost tracking per shot (weapon decay)
+- Profit/Loss calculation (loot - cost)
+- Color-coded P/L (green=profit, red=loss)
+- Shots fired counter
+- Estimated kills (1 per loot event)
+- DPP display in HUD
+
+### ✅ Core Systems
+- `core/attachments.py` - Full attachment type system
+- Attachment compatibility validation
+- Mock attachment data for testing
+
+## Issues Discovered
+
+### Calculation Bugs (CRITICAL)
+Weapon cost showing **30,590 PED/hour** - completely wrong!
+
+**Problems:**
+- Ammo: 848 PEC/shot - should be ~8.48 PEC (0.0848 PED)
+- DPP: 0.0506 - way too low (should be ~2-4)
+- Unit conversion errors between PEC/PED
+
+### Armor System Needs Redesign
+User feedback:
+- Want to pick armor sets OR individual parts
+- Current implementation annoying
+- Mix & match should be supported (e.g., Ghost Harness + Shogun Arms)
+
+### Attachment Research Needed
+- Real EU attachment mechanics not fully understood
+- Need to research from Entropia Wiki/Nexus
+- Amplifiers: add damage + increase ammo burn
+- Scopes: range boost, minimal decay
+- Absorbers: damage reduction, moderate decay
+
+## Next Steps
+
+1. **Fix calculation bugs** - Unit conversion, DPP formula
+2. **Research attachments** - Proper decay/effect values
+3. **Redesign armor system** - Sets + individual parts
+4. **Test with real hunt** - Verify costs are realistic
+
+## Key Decisions
+
+- Kill tracking: 1 per loot event (estimated, not exact)
+- Shrapnel handling: included in loot, not kill count
+- Cost tracking: weapon decay per shot + armor decay per hit
+- Agent swarm effective for parallel development but needs verification
+
+## Technical Debt
+
+- Calculation formulas need unit tests
+- Attachment effects need validation against real EU data
+- Armor system needs complete rewrite for flexibility

ui/loadout_manager.py

@@ -139,10 +139,14 @@ class LoadoutConfig:
         return total
     
     def get_total_ammo_per_shot(self) -> Decimal:
-        """Calculate total ammo per shot including amplifier."""
+        """Calculate total ammo cost per shot in PEC.
-        total = self.weapon_ammo_pec
+        
+        Note: ammo_burn from API is in ammo units (1 ammo = 0.01 PEC)
+        """
+        # Convert ammo units to PEC (1 ammo = 0.01 PEC)
+        total = self.weapon_ammo_pec * Decimal("0.01")
         if self.weapon_amplifier:
-            # Amplifiers typically add ammo cost based on damage increase
+            # Amplifiers add ammo cost based on damage increase
             # Rough estimate: 0.2 PEC per damage point for amp
             total += self.weapon_amplifier.damage_bonus * Decimal("0.2")
         return total