api/app/data/affixes/prefixes.yaml

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+# Item Prefix Affixes
+# Prefixes appear before the item name: "Flaming Dagger"
+#
+# Affix Structure:
+#   affix_id: Unique identifier
+#   name: Display name (what appears in the item name)
+#   affix_type: "prefix"
+#   tier: "minor" (RARE), "major" (EPIC), "legendary" (LEGENDARY only)
+#   description: Flavor text describing the effect
+#   stat_bonuses: Dict of stat_name -> bonus value
+#   defense_bonus: Direct defense bonus
+#   resistance_bonus: Direct resistance bonus
+#   damage_bonus: Flat damage bonus (weapons)
+#   damage_type: Elemental damage type
+#   elemental_ratio: Portion converted to elemental (0.0-1.0)
+#   crit_chance_bonus: Added to crit chance
+#   crit_multiplier_bonus: Added to crit multiplier
+#   allowed_item_types: [] = all types, or ["weapon", "armor"]
+#   required_rarity: null = any, or "legendary"
+
+prefixes:
+  # ==================== ELEMENTAL PREFIXES (FIRE) ====================
+  flaming:
+    affix_id: "flaming"
+    name: "Flaming"
+    affix_type: "prefix"
+    tier: "minor"
+    description: "Imbued with fire magic, dealing bonus fire damage"
+    damage_type: "fire"
+    elemental_ratio: 0.25
+    damage_bonus: 3
+    allowed_item_types: ["weapon"]
+
+  blazing:
+    affix_id: "blazing"
+    name: "Blazing"
+    affix_type: "prefix"
+    tier: "major"
+    description: "Wreathed in intense flames"
+    damage_type: "fire"
+    elemental_ratio: 0.35
+    damage_bonus: 6
+    allowed_item_types: ["weapon"]
+
+  # ==================== ELEMENTAL PREFIXES (ICE) ====================
+  frozen:
+    affix_id: "frozen"
+    name: "Frozen"
+    affix_type: "prefix"
+    tier: "minor"
+    description: "Enchanted with frost magic"
+    damage_type: "ice"
+    elemental_ratio: 0.25
+    damage_bonus: 3
+    allowed_item_types: ["weapon"]
+
+  glacial:
+    affix_id: "glacial"
+    name: "Glacial"
+    affix_type: "prefix"
+    tier: "major"
+    description: "Encased in eternal ice"
+    damage_type: "ice"
+    elemental_ratio: 0.35
+    damage_bonus: 6
+    allowed_item_types: ["weapon"]
+
+  # ==================== ELEMENTAL PREFIXES (LIGHTNING) ====================
+  shocking:
+    affix_id: "shocking"
+    name: "Shocking"
+    affix_type: "prefix"
+    tier: "minor"
+    description: "Crackles with electrical energy"
+    damage_type: "lightning"
+    elemental_ratio: 0.25
+    damage_bonus: 3
+    allowed_item_types: ["weapon"]
+
+  thundering:
+    affix_id: "thundering"
+    name: "Thundering"
+    affix_type: "prefix"
+    tier: "major"
+    description: "Charged with the power of storms"
+    damage_type: "lightning"
+    elemental_ratio: 0.35
+    damage_bonus: 6
+    allowed_item_types: ["weapon"]
+
+  # ==================== MATERIAL PREFIXES ====================
+  iron:
+    affix_id: "iron"
+    name: "Iron"
+    affix_type: "prefix"
+    tier: "minor"
+    description: "Reinforced with sturdy iron"
+    stat_bonuses:
+      constitution: 1
+    defense_bonus: 2
+
+  steel:
+    affix_id: "steel"
+    name: "Steel"
+    affix_type: "prefix"
+    tier: "major"
+    description: "Forged from fine steel"
+    stat_bonuses:
+      constitution: 2
+      strength: 1
+    defense_bonus: 4
+
+  # ==================== QUALITY PREFIXES ====================
+  sharp:
+    affix_id: "sharp"
+    name: "Sharp"
+    affix_type: "prefix"
+    tier: "minor"
+    description: "Honed to a fine edge"
+    damage_bonus: 3
+    crit_chance_bonus: 0.02
+    allowed_item_types: ["weapon"]
+
+  keen:
+    affix_id: "keen"
+    name: "Keen"
+    affix_type: "prefix"
+    tier: "major"
+    description: "Razor-sharp edge that finds weak points"
+    damage_bonus: 5
+    crit_chance_bonus: 0.04
+    allowed_item_types: ["weapon"]
+
+  # ==================== DEFENSIVE PREFIXES ====================
+  sturdy:
+    affix_id: "sturdy"
+    name: "Sturdy"
+    affix_type: "prefix"
+    tier: "minor"
+    description: "Built to withstand punishment"
+    defense_bonus: 3
+    allowed_item_types: ["armor"]
+
+  reinforced:
+    affix_id: "reinforced"
+    name: "Reinforced"
+    affix_type: "prefix"
+    tier: "major"
+    description: "Heavily reinforced for maximum protection"
+    defense_bonus: 5
+    resistance_bonus: 2
+    allowed_item_types: ["armor"]
+
+  # ==================== LEGENDARY PREFIXES ====================
+  infernal:
+    affix_id: "infernal"
+    name: "Infernal"
+    affix_type: "prefix"
+    tier: "legendary"
+    description: "Burns with hellfire"
+    damage_type: "fire"
+    elemental_ratio: 0.45
+    damage_bonus: 12
+    allowed_item_types: ["weapon"]
+    required_rarity: "legendary"
+
+  vorpal:
+    affix_id: "vorpal"
+    name: "Vorpal"
+    affix_type: "prefix"
+    tier: "legendary"
+    description: "Cuts through anything with supernatural precision"
+    damage_bonus: 10
+    crit_chance_bonus: 0.08
+    crit_multiplier_bonus: 0.5
+    allowed_item_types: ["weapon"]
+    required_rarity: "legendary"

api/app/data/affixes/suffixes.yaml

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+# Item Suffix Affixes
+# Suffixes appear after the item name: "Dagger of Strength"
+#
+# Suffix naming convention:
+#   - Minor tier: "of [Stat]" (e.g., "of Strength")
+#   - Major tier: "of the [Animal/Element]" (e.g., "of the Bear")
+#   - Legendary tier: "of the [Mythical]" (e.g., "of the Titan")
+
+suffixes:
+  # ==================== STAT SUFFIXES (MINOR) ====================
+  of_strength:
+    affix_id: "of_strength"
+    name: "of Strength"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants physical power"
+    stat_bonuses:
+      strength: 2
+
+  of_dexterity:
+    affix_id: "of_dexterity"
+    name: "of Dexterity"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants agility and precision"
+    stat_bonuses:
+      dexterity: 2
+
+  of_constitution:
+    affix_id: "of_constitution"
+    name: "of Fortitude"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants endurance"
+    stat_bonuses:
+      constitution: 2
+
+  of_intelligence:
+    affix_id: "of_intelligence"
+    name: "of Intelligence"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants magical aptitude"
+    stat_bonuses:
+      intelligence: 2
+
+  of_wisdom:
+    affix_id: "of_wisdom"
+    name: "of Wisdom"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants insight and perception"
+    stat_bonuses:
+      wisdom: 2
+
+  of_charisma:
+    affix_id: "of_charisma"
+    name: "of Charm"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants social influence"
+    stat_bonuses:
+      charisma: 2
+
+  of_luck:
+    affix_id: "of_luck"
+    name: "of Fortune"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Grants favor from fate"
+    stat_bonuses:
+      luck: 2
+
+  # ==================== ENHANCED STAT SUFFIXES (MAJOR) ====================
+  of_the_bear:
+    affix_id: "of_the_bear"
+    name: "of the Bear"
+    affix_type: "suffix"
+    tier: "major"
+    description: "Grants the might and endurance of a bear"
+    stat_bonuses:
+      strength: 4
+      constitution: 2
+
+  of_the_fox:
+    affix_id: "of_the_fox"
+    name: "of the Fox"
+    affix_type: "suffix"
+    tier: "major"
+    description: "Grants the cunning and agility of a fox"
+    stat_bonuses:
+      dexterity: 4
+      luck: 2
+
+  of_the_owl:
+    affix_id: "of_the_owl"
+    name: "of the Owl"
+    affix_type: "suffix"
+    tier: "major"
+    description: "Grants the wisdom and insight of an owl"
+    stat_bonuses:
+      intelligence: 3
+      wisdom: 3
+
+  # ==================== DEFENSIVE SUFFIXES ====================
+  of_protection:
+    affix_id: "of_protection"
+    name: "of Protection"
+    affix_type: "suffix"
+    tier: "minor"
+    description: "Offers physical protection"
+    defense_bonus: 3
+
+  of_warding:
+    affix_id: "of_warding"
+    name: "of Warding"
+    affix_type: "suffix"
+    tier: "major"
+    description: "Wards against physical and magical harm"
+    defense_bonus: 5
+    resistance_bonus: 3
+
+  # ==================== LEGENDARY SUFFIXES ====================
+  of_the_titan:
+    affix_id: "of_the_titan"
+    name: "of the Titan"
+    affix_type: "suffix"
+    tier: "legendary"
+    description: "Grants titanic strength and endurance"
+    stat_bonuses:
+      strength: 8
+      constitution: 4
+    required_rarity: "legendary"
+
+  of_the_wind:
+    affix_id: "of_the_wind"
+    name: "of the Wind"
+    affix_type: "suffix"
+    tier: "legendary"
+    description: "Swift as the wind itself"
+    stat_bonuses:
+      dexterity: 8
+      luck: 4
+    crit_chance_bonus: 0.05
+    required_rarity: "legendary"
+
+  of_invincibility:
+    affix_id: "of_invincibility"
+    name: "of Invincibility"
+    affix_type: "suffix"
+    tier: "legendary"
+    description: "Grants supreme protection"
+    defense_bonus: 10
+    resistance_bonus: 8
+    required_rarity: "legendary"

api/app/data/base_items/armor.yaml

@@ -0,0 +1,152 @@
+# Base Armor Templates for Procedural Generation
+#
+# These templates define the foundation that affixes attach to.
+# Example: "Leather Vest" + "Sturdy" prefix = "Sturdy Leather Vest"
+#
+# Armor categories:
+# - Cloth: Low defense, high resistance (mages)
+# - Leather: Balanced defense/resistance (rogues)
+# - Chain: Medium defense, low resistance (versatile)
+# - Plate: High defense, low resistance (warriors)
+
+armor:
+  # ==================== CLOTH (MAGE ARMOR) ====================
+  cloth_robe:
+    template_id: "cloth_robe"
+    name: "Cloth Robe"
+    item_type: "armor"
+    description: "Simple cloth robes favored by spellcasters"
+    base_defense: 2
+    base_resistance: 5
+    base_value: 15
+    required_level: 1
+    drop_weight: 1.3
+
+  silk_robe:
+    template_id: "silk_robe"
+    name: "Silk Robe"
+    item_type: "armor"
+    description: "Fine silk robes that channel magical energy"
+    base_defense: 3
+    base_resistance: 8
+    base_value: 40
+    required_level: 3
+    drop_weight: 0.9
+
+  arcane_vestments:
+    template_id: "arcane_vestments"
+    name: "Arcane Vestments"
+    item_type: "armor"
+    description: "Robes woven with magical threads"
+    base_defense: 5
+    base_resistance: 12
+    base_value: 80
+    required_level: 5
+    drop_weight: 0.6
+    min_rarity: "uncommon"
+
+  # ==================== LEATHER (ROGUE ARMOR) ====================
+  leather_vest:
+    template_id: "leather_vest"
+    name: "Leather Vest"
+    item_type: "armor"
+    description: "Basic leather protection for agile fighters"
+    base_defense: 5
+    base_resistance: 2
+    base_value: 20
+    required_level: 1
+    drop_weight: 1.3
+
+  studded_leather:
+    template_id: "studded_leather"
+    name: "Studded Leather"
+    item_type: "armor"
+    description: "Leather armor reinforced with metal studs"
+    base_defense: 8
+    base_resistance: 3
+    base_value: 45
+    required_level: 3
+    drop_weight: 1.0
+
+  hardened_leather:
+    template_id: "hardened_leather"
+    name: "Hardened Leather"
+    item_type: "armor"
+    description: "Boiled and hardened leather for superior protection"
+    base_defense: 12
+    base_resistance: 5
+    base_value: 75
+    required_level: 5
+    drop_weight: 0.7
+    min_rarity: "uncommon"
+
+  # ==================== CHAIN (VERSATILE) ====================
+  chain_shirt:
+    template_id: "chain_shirt"
+    name: "Chain Shirt"
+    item_type: "armor"
+    description: "A shirt of interlocking metal rings"
+    base_defense: 7
+    base_resistance: 2
+    base_value: 35
+    required_level: 2
+    drop_weight: 1.0
+
+  chainmail:
+    template_id: "chainmail"
+    name: "Chainmail"
+    item_type: "armor"
+    description: "Full chainmail armor covering torso and arms"
+    base_defense: 10
+    base_resistance: 3
+    base_value: 50
+    required_level: 3
+    drop_weight: 1.0
+
+  heavy_chainmail:
+    template_id: "heavy_chainmail"
+    name: "Heavy Chainmail"
+    item_type: "armor"
+    description: "Thick chainmail with reinforced rings"
+    base_defense: 14
+    base_resistance: 4
+    base_value: 85
+    required_level: 5
+    drop_weight: 0.7
+    min_rarity: "uncommon"
+
+  # ==================== PLATE (WARRIOR ARMOR) ====================
+  scale_mail:
+    template_id: "scale_mail"
+    name: "Scale Mail"
+    item_type: "armor"
+    description: "Overlapping metal scales on leather backing"
+    base_defense: 12
+    base_resistance: 2
+    base_value: 60
+    required_level: 4
+    drop_weight: 0.8
+
+  half_plate:
+    template_id: "half_plate"
+    name: "Half Plate"
+    item_type: "armor"
+    description: "Plate armor protecting vital areas"
+    base_defense: 16
+    base_resistance: 2
+    base_value: 120
+    required_level: 6
+    drop_weight: 0.5
+    min_rarity: "rare"
+
+  plate_armor:
+    template_id: "plate_armor"
+    name: "Plate Armor"
+    item_type: "armor"
+    description: "Full metal plate protection"
+    base_defense: 22
+    base_resistance: 3
+    base_value: 200
+    required_level: 7
+    drop_weight: 0.4
+    min_rarity: "rare"

api/app/data/base_items/weapons.yaml

@@ -0,0 +1,182 @@
+# Base Weapon Templates for Procedural Generation
+#
+# These templates define the foundation that affixes attach to.
+# Example: "Dagger" + "Flaming" prefix = "Flaming Dagger"
+#
+# Template Structure:
+#   template_id: Unique identifier
+#   name: Base item name
+#   item_type: "weapon"
+#   description: Flavor text
+#   base_damage: Weapon damage
+#   base_value: Gold value
+#   damage_type: "physical" (default)
+#   crit_chance: Critical hit chance (0.0-1.0)
+#   crit_multiplier: Crit damage multiplier
+#   required_level: Min level to use/drop
+#   drop_weight: Higher = more common (1.0 = standard)
+#   min_rarity: Minimum rarity for this template
+
+weapons:
+  # ==================== ONE-HANDED SWORDS ====================
+  dagger:
+    template_id: "dagger"
+    name: "Dagger"
+    item_type: "weapon"
+    description: "A small, quick blade for close combat"
+    base_damage: 6
+    base_value: 15
+    damage_type: "physical"
+    crit_chance: 0.08
+    crit_multiplier: 2.0
+    required_level: 1
+    drop_weight: 1.5
+
+  short_sword:
+    template_id: "short_sword"
+    name: "Short Sword"
+    item_type: "weapon"
+    description: "A versatile one-handed blade"
+    base_damage: 10
+    base_value: 30
+    damage_type: "physical"
+    crit_chance: 0.06
+    crit_multiplier: 2.0
+    required_level: 1
+    drop_weight: 1.3
+
+  longsword:
+    template_id: "longsword"
+    name: "Longsword"
+    item_type: "weapon"
+    description: "A standard warrior's blade"
+    base_damage: 14
+    base_value: 50
+    damage_type: "physical"
+    crit_chance: 0.05
+    crit_multiplier: 2.0
+    required_level: 3
+    drop_weight: 1.0
+
+  # ==================== TWO-HANDED WEAPONS ====================
+  greatsword:
+    template_id: "greatsword"
+    name: "Greatsword"
+    item_type: "weapon"
+    description: "A massive two-handed blade"
+    base_damage: 22
+    base_value: 100
+    damage_type: "physical"
+    crit_chance: 0.04
+    crit_multiplier: 2.5
+    required_level: 5
+    drop_weight: 0.7
+    min_rarity: "uncommon"
+
+  # ==================== AXES ====================
+  hatchet:
+    template_id: "hatchet"
+    name: "Hatchet"
+    item_type: "weapon"
+    description: "A small throwing axe"
+    base_damage: 8
+    base_value: 20
+    damage_type: "physical"
+    crit_chance: 0.06
+    crit_multiplier: 2.2
+    required_level: 1
+    drop_weight: 1.2
+
+  battle_axe:
+    template_id: "battle_axe"
+    name: "Battle Axe"
+    item_type: "weapon"
+    description: "A heavy axe designed for combat"
+    base_damage: 16
+    base_value: 60
+    damage_type: "physical"
+    crit_chance: 0.05
+    crit_multiplier: 2.3
+    required_level: 4
+    drop_weight: 0.9
+
+  # ==================== BLUNT WEAPONS ====================
+  club:
+    template_id: "club"
+    name: "Club"
+    item_type: "weapon"
+    description: "A simple wooden club"
+    base_damage: 7
+    base_value: 10
+    damage_type: "physical"
+    crit_chance: 0.04
+    crit_multiplier: 2.0
+    required_level: 1
+    drop_weight: 1.5
+
+  mace:
+    template_id: "mace"
+    name: "Mace"
+    item_type: "weapon"
+    description: "A flanged mace for crushing armor"
+    base_damage: 12
+    base_value: 40
+    damage_type: "physical"
+    crit_chance: 0.05
+    crit_multiplier: 2.0
+    required_level: 2
+    drop_weight: 1.0
+
+  # ==================== STAVES ====================
+  quarterstaff:
+    template_id: "quarterstaff"
+    name: "Quarterstaff"
+    item_type: "weapon"
+    description: "A simple wooden staff"
+    base_damage: 6
+    base_value: 10
+    damage_type: "physical"
+    crit_chance: 0.05
+    crit_multiplier: 2.0
+    required_level: 1
+    drop_weight: 1.2
+
+  wizard_staff:
+    template_id: "wizard_staff"
+    name: "Wizard Staff"
+    item_type: "weapon"
+    description: "A staff attuned to magical energy"
+    base_damage: 8
+    base_value: 45
+    damage_type: "physical"
+    crit_chance: 0.05
+    crit_multiplier: 2.0
+    required_level: 3
+    drop_weight: 0.8
+
+  # ==================== RANGED ====================
+  shortbow:
+    template_id: "shortbow"
+    name: "Shortbow"
+    item_type: "weapon"
+    description: "A compact bow for quick shots"
+    base_damage: 8
+    base_value: 25
+    damage_type: "physical"
+    crit_chance: 0.07
+    crit_multiplier: 2.0
+    required_level: 1
+    drop_weight: 1.1
+
+  longbow:
+    template_id: "longbow"
+    name: "Longbow"
+    item_type: "weapon"
+    description: "A powerful bow with excellent range"
+    base_damage: 14
+    base_value: 55
+    damage_type: "physical"
+    crit_chance: 0.08
+    crit_multiplier: 2.2
+    required_level: 4
+    drop_weight: 0.9

api/app/models/affixes.py

@@ -0,0 +1,303 @@
+"""
+Item affix system for procedural item generation.
+
+This module defines affixes (prefixes and suffixes) that can be attached to items
+to provide stat bonuses and generate Diablo-style names like "Flaming Dagger of Strength".
+"""
+
+from dataclasses import dataclass, field, asdict
+from typing import Dict, Any, List, Optional
+
+from app.models.enums import AffixType, AffixTier, DamageType, ItemRarity
+
+
+@dataclass
+class Affix:
+    """
+    Represents a single item affix (prefix or suffix).
+
+    Affixes provide stat bonuses and contribute to item naming.
+    Prefixes appear before the item name: "Flaming Dagger"
+    Suffixes appear after the item name: "Dagger of Strength"
+
+    Attributes:
+        affix_id: Unique identifier (e.g., "flaming", "of_strength")
+        name: Display name for the affix (e.g., "Flaming", "of Strength")
+        affix_type: PREFIX or SUFFIX
+        tier: MINOR, MAJOR, or LEGENDARY (determines bonus magnitude)
+        description: Human-readable description of the affix effect
+
+        Stat Bonuses:
+        stat_bonuses: Dict mapping stat name to bonus value
+                     Example: {"strength": 2, "constitution": 1}
+        defense_bonus: Direct defense bonus
+        resistance_bonus: Direct resistance bonus
+
+        Weapon Properties (PREFIX only, elemental):
+        damage_bonus: Flat damage bonus added to weapon
+        damage_type: Elemental damage type (fire, ice, etc.)
+        elemental_ratio: Portion of damage converted to elemental (0.0-1.0)
+        crit_chance_bonus: Added to weapon crit chance
+        crit_multiplier_bonus: Added to crit damage multiplier
+
+        Restrictions:
+        allowed_item_types: Empty list = all types allowed
+        required_rarity: Minimum rarity to roll this affix (for legendary-only)
+    """
+
+    affix_id: str
+    name: str
+    affix_type: AffixType
+    tier: AffixTier
+    description: str = ""
+
+    # Stat bonuses (applies to any item)
+    stat_bonuses: Dict[str, int] = field(default_factory=dict)
+    defense_bonus: int = 0
+    resistance_bonus: int = 0
+
+    # Weapon-specific bonuses
+    damage_bonus: int = 0
+    damage_type: Optional[DamageType] = None
+    elemental_ratio: float = 0.0
+    crit_chance_bonus: float = 0.0
+    crit_multiplier_bonus: float = 0.0
+
+    # Restrictions
+    allowed_item_types: List[str] = field(default_factory=list)
+    required_rarity: Optional[str] = None
+
+    def applies_elemental_damage(self) -> bool:
+        """
+        Check if this affix converts damage to elemental.
+
+        Returns:
+            True if affix adds elemental damage component
+        """
+        return self.damage_type is not None and self.elemental_ratio > 0.0
+
+    def is_legendary_only(self) -> bool:
+        """
+        Check if this affix only rolls on legendary items.
+
+        Returns:
+            True if affix requires legendary rarity
+        """
+        return self.required_rarity == "legendary"
+
+    def can_apply_to(self, item_type: str, rarity: str) -> bool:
+        """
+        Check if this affix can be applied to an item.
+
+        Args:
+            item_type: Type of item ("weapon", "armor", etc.)
+            rarity: Item rarity ("common", "rare", "epic", "legendary")
+
+        Returns:
+            True if affix can be applied, False otherwise
+        """
+        # Check rarity requirement
+        if self.required_rarity and rarity != self.required_rarity:
+            return False
+
+        # Check item type restriction
+        if self.allowed_item_types and item_type not in self.allowed_item_types:
+            return False
+
+        return True
+
+    def to_dict(self) -> Dict[str, Any]:
+        """
+        Serialize affix to dictionary.
+
+        Returns:
+            Dictionary containing all affix data
+        """
+        data = asdict(self)
+        data["affix_type"] = self.affix_type.value
+        data["tier"] = self.tier.value
+        if self.damage_type:
+            data["damage_type"] = self.damage_type.value
+        return data
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> 'Affix':
+        """
+        Deserialize affix from dictionary.
+
+        Args:
+            data: Dictionary containing affix data
+
+        Returns:
+            Affix instance
+        """
+        affix_type = AffixType(data["affix_type"])
+        tier = AffixTier(data["tier"])
+        damage_type = DamageType(data["damage_type"]) if data.get("damage_type") else None
+
+        return cls(
+            affix_id=data["affix_id"],
+            name=data["name"],
+            affix_type=affix_type,
+            tier=tier,
+            description=data.get("description", ""),
+            stat_bonuses=data.get("stat_bonuses", {}),
+            defense_bonus=data.get("defense_bonus", 0),
+            resistance_bonus=data.get("resistance_bonus", 0),
+            damage_bonus=data.get("damage_bonus", 0),
+            damage_type=damage_type,
+            elemental_ratio=data.get("elemental_ratio", 0.0),
+            crit_chance_bonus=data.get("crit_chance_bonus", 0.0),
+            crit_multiplier_bonus=data.get("crit_multiplier_bonus", 0.0),
+            allowed_item_types=data.get("allowed_item_types", []),
+            required_rarity=data.get("required_rarity"),
+        )
+
+    def __repr__(self) -> str:
+        """String representation of the affix."""
+        bonuses = []
+        if self.stat_bonuses:
+            bonuses.append(f"stats={self.stat_bonuses}")
+        if self.damage_bonus:
+            bonuses.append(f"dmg+{self.damage_bonus}")
+        if self.defense_bonus:
+            bonuses.append(f"def+{self.defense_bonus}")
+        if self.applies_elemental_damage():
+            bonuses.append(f"{self.damage_type.value}={self.elemental_ratio:.0%}")
+
+        bonus_str = ", ".join(bonuses) if bonuses else "no bonuses"
+        return f"Affix({self.name}, {self.affix_type.value}, {self.tier.value}, {bonus_str})"
+
+
+@dataclass
+class BaseItemTemplate:
+    """
+    Template for base items used in procedural generation.
+
+    Base items define the foundation (e.g., "Dagger", "Longsword", "Chainmail")
+    that affixes attach to during item generation.
+
+    Attributes:
+        template_id: Unique identifier (e.g., "dagger", "longsword")
+        name: Display name (e.g., "Dagger", "Longsword")
+        item_type: Category ("weapon", "armor")
+        description: Flavor text for the base item
+
+        Base Stats:
+        base_damage: Base weapon damage (weapons only)
+        base_defense: Base armor defense (armor only)
+        base_resistance: Base magic resistance (armor only)
+        base_value: Base gold value before rarity/affix modifiers
+
+        Weapon Properties:
+        damage_type: Primary damage type (usually "physical")
+        crit_chance: Base critical hit chance
+        crit_multiplier: Base critical damage multiplier
+
+        Generation:
+        required_level: Minimum character level for this template
+        drop_weight: Weighting for random selection (higher = more common)
+        min_rarity: Minimum rarity this template can generate at
+    """
+
+    template_id: str
+    name: str
+    item_type: str  # "weapon" or "armor"
+    description: str = ""
+
+    # Base stats
+    base_damage: int = 0
+    base_defense: int = 0
+    base_resistance: int = 0
+    base_value: int = 10
+
+    # Weapon properties
+    damage_type: str = "physical"
+    crit_chance: float = 0.05
+    crit_multiplier: float = 2.0
+
+    # Generation settings
+    required_level: int = 1
+    drop_weight: float = 1.0
+    min_rarity: str = "common"
+
+    def can_generate_at_rarity(self, rarity: str) -> bool:
+        """
+        Check if this template can generate at a given rarity.
+
+        Some templates (like greatswords) may only drop at rare+.
+
+        Args:
+            rarity: Target rarity to check
+
+        Returns:
+            True if template can generate at this rarity
+        """
+        rarity_order = ["common", "uncommon", "rare", "epic", "legendary"]
+        min_index = rarity_order.index(self.min_rarity)
+        target_index = rarity_order.index(rarity)
+        return target_index >= min_index
+
+    def can_drop_for_level(self, character_level: int) -> bool:
+        """
+        Check if this template can drop for a character level.
+
+        Args:
+            character_level: Character's current level
+
+        Returns:
+            True if template can drop for this level
+        """
+        return character_level >= self.required_level
+
+    def to_dict(self) -> Dict[str, Any]:
+        """
+        Serialize template to dictionary.
+
+        Returns:
+            Dictionary containing all template data
+        """
+        return asdict(self)
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> 'BaseItemTemplate':
+        """
+        Deserialize template from dictionary.
+
+        Args:
+            data: Dictionary containing template data
+
+        Returns:
+            BaseItemTemplate instance
+        """
+        return cls(
+            template_id=data["template_id"],
+            name=data["name"],
+            item_type=data["item_type"],
+            description=data.get("description", ""),
+            base_damage=data.get("base_damage", 0),
+            base_defense=data.get("base_defense", 0),
+            base_resistance=data.get("base_resistance", 0),
+            base_value=data.get("base_value", 10),
+            damage_type=data.get("damage_type", "physical"),
+            crit_chance=data.get("crit_chance", 0.05),
+            crit_multiplier=data.get("crit_multiplier", 2.0),
+            required_level=data.get("required_level", 1),
+            drop_weight=data.get("drop_weight", 1.0),
+            min_rarity=data.get("min_rarity", "common"),
+        )
+
+    def __repr__(self) -> str:
+        """String representation of the template."""
+        if self.item_type == "weapon":
+            return (
+                f"BaseItemTemplate({self.name}, weapon, dmg={self.base_damage}, "
+                f"crit={self.crit_chance*100:.0f}%, lvl={self.required_level})"
+            )
+        elif self.item_type == "armor":
+            return (
+                f"BaseItemTemplate({self.name}, armor, def={self.base_defense}, "
+                f"res={self.base_resistance}, lvl={self.required_level})"
+            )
+        else:
+            return f"BaseItemTemplate({self.name}, {self.item_type})"

api/app/models/enums.py

@@ -50,6 +50,21 @@ class ItemRarity(Enum):
     LEGENDARY = "legendary"     # Orange/gold - best items
 
 
+class AffixType(Enum):
+    """Types of item affixes for procedural item generation."""
+
+    PREFIX = "prefix"   # Appears before item name: "Flaming Dagger"
+    SUFFIX = "suffix"   # Appears after item name: "Dagger of Strength"
+
+
+class AffixTier(Enum):
+    """Affix power tiers determining bonus magnitudes."""
+
+    MINOR = "minor"           # Weaker bonuses, rolls on RARE items
+    MAJOR = "major"           # Medium bonuses, rolls on EPIC items
+    LEGENDARY = "legendary"   # Strongest bonuses, LEGENDARY only
+
+
 class StatType(Enum):
     """Character attribute types."""
 

api/app/models/items.py

@@ -81,6 +81,24 @@ class Item:
     required_level: int = 1
     required_class: Optional[str] = None
 
+    # Affix tracking (for procedurally generated items)
+    applied_affixes: List[str] = field(default_factory=list)  # List of affix_ids
+    base_template_id: Optional[str] = None  # ID of base item template used
+    generated_name: Optional[str] = None  # Full generated name with affixes
+    is_generated: bool = False  # True if created by item generator
+
+    def get_display_name(self) -> str:
+        """
+        Get the item's display name.
+
+        For generated items, returns the affix-enhanced name.
+        For static items, returns the base name.
+
+        Returns:
+            Display name string
+        """
+        return self.generated_name or self.name
+
     def is_weapon(self) -> bool:
         """Check if this item is a weapon."""
         return self.item_type == ItemType.WEAPON
@@ -166,6 +184,8 @@ class Item:
         if self.elemental_damage_type:
             data["elemental_damage_type"] = self.elemental_damage_type.value
         data["effects_on_use"] = [effect.to_dict() for effect in self.effects_on_use]
+        # Include display_name for convenience
+        data["display_name"] = self.get_display_name()
         return data
 
     @classmethod
@@ -215,6 +235,11 @@ class Item:
             resistance=data.get("resistance", 0),
             required_level=data.get("required_level", 1),
             required_class=data.get("required_class"),
+            # Affix tracking fields
+            applied_affixes=data.get("applied_affixes", []),
+            base_template_id=data.get("base_template_id"),
+            generated_name=data.get("generated_name"),
+            is_generated=data.get("is_generated", False),
         )
 
     def __repr__(self) -> str:

api/app/services/affix_loader.py

@@ -0,0 +1,315 @@
+"""
+Affix Loader Service - YAML-based affix pool loading.
+
+This service loads prefix and suffix affix definitions from YAML files,
+providing a data-driven approach to item generation.
+"""
+
+from pathlib import Path
+from typing import Dict, List, Optional
+import random
+import yaml
+
+from app.models.affixes import Affix
+from app.models.enums import AffixType, AffixTier
+from app.utils.logging import get_logger
+
+logger = get_logger(__file__)
+
+
+class AffixLoader:
+    """
+    Loads and manages item affixes from YAML configuration files.
+
+    This allows game designers to define affixes without touching code.
+    Affixes are organized into prefixes.yaml and suffixes.yaml files.
+    """
+
+    def __init__(self, data_dir: Optional[str] = None):
+        """
+        Initialize the affix loader.
+
+        Args:
+            data_dir: Path to directory containing affix YAML files
+                     Defaults to /app/data/affixes/
+        """
+        if data_dir is None:
+            # Default to app/data/affixes relative to this file
+            current_file = Path(__file__)
+            app_dir = current_file.parent.parent  # Go up to /app
+            data_dir = str(app_dir / "data" / "affixes")
+
+        self.data_dir = Path(data_dir)
+        self._prefix_cache: Dict[str, Affix] = {}
+        self._suffix_cache: Dict[str, Affix] = {}
+        self._loaded = False
+
+        logger.info("AffixLoader initialized", data_dir=str(self.data_dir))
+
+    def _ensure_loaded(self) -> None:
+        """Ensure affixes are loaded before any operation."""
+        if not self._loaded:
+            self.load_all()
+
+    def load_all(self) -> None:
+        """Load all affixes from YAML files."""
+        if not self.data_dir.exists():
+            logger.warning("Affix data directory not found", path=str(self.data_dir))
+            return
+
+        # Load prefixes
+        prefixes_file = self.data_dir / "prefixes.yaml"
+        if prefixes_file.exists():
+            self._load_affixes_from_file(prefixes_file, self._prefix_cache)
+
+        # Load suffixes
+        suffixes_file = self.data_dir / "suffixes.yaml"
+        if suffixes_file.exists():
+            self._load_affixes_from_file(suffixes_file, self._suffix_cache)
+
+        self._loaded = True
+        logger.info(
+            "Affixes loaded",
+            prefix_count=len(self._prefix_cache),
+            suffix_count=len(self._suffix_cache)
+        )
+
+    def _load_affixes_from_file(
+        self,
+        yaml_file: Path,
+        cache: Dict[str, Affix]
+    ) -> None:
+        """
+        Load affixes from a YAML file into the cache.
+
+        Args:
+            yaml_file: Path to the YAML file
+            cache: Cache dictionary to populate
+        """
+        try:
+            with open(yaml_file, 'r') as f:
+                data = yaml.safe_load(f)
+
+            # Get the top-level key (prefixes or suffixes)
+            affix_key = "prefixes" if "prefixes" in data else "suffixes"
+            affixes_data = data.get(affix_key, {})
+
+            for affix_id, affix_data in affixes_data.items():
+                # Ensure affix_id is set
+                affix_data["affix_id"] = affix_id
+
+                # Set defaults for missing optional fields
+                affix_data.setdefault("stat_bonuses", {})
+                affix_data.setdefault("defense_bonus", 0)
+                affix_data.setdefault("resistance_bonus", 0)
+                affix_data.setdefault("damage_bonus", 0)
+                affix_data.setdefault("elemental_ratio", 0.0)
+                affix_data.setdefault("crit_chance_bonus", 0.0)
+                affix_data.setdefault("crit_multiplier_bonus", 0.0)
+                affix_data.setdefault("allowed_item_types", [])
+                affix_data.setdefault("required_rarity", None)
+
+                affix = Affix.from_dict(affix_data)
+                cache[affix.affix_id] = affix
+
+            logger.debug(
+                "Affixes loaded from file",
+                file=str(yaml_file),
+                count=len(affixes_data)
+            )
+
+        except Exception as e:
+            logger.error(
+                "Failed to load affix file",
+                file=str(yaml_file),
+                error=str(e)
+            )
+
+    def get_affix(self, affix_id: str) -> Optional[Affix]:
+        """
+        Get a specific affix by ID.
+
+        Args:
+            affix_id: Unique affix identifier
+
+        Returns:
+            Affix instance or None if not found
+        """
+        self._ensure_loaded()
+
+        if affix_id in self._prefix_cache:
+            return self._prefix_cache[affix_id]
+        if affix_id in self._suffix_cache:
+            return self._suffix_cache[affix_id]
+
+        return None
+
+    def get_eligible_prefixes(
+        self,
+        item_type: str,
+        rarity: str,
+        tier: Optional[AffixTier] = None
+    ) -> List[Affix]:
+        """
+        Get all prefixes eligible for an item.
+
+        Args:
+            item_type: Type of item ("weapon", "armor")
+            rarity: Item rarity ("rare", "epic", "legendary")
+            tier: Optional tier filter
+
+        Returns:
+            List of eligible Affix instances
+        """
+        self._ensure_loaded()
+
+        eligible = []
+        for affix in self._prefix_cache.values():
+            # Check if affix can apply to this item
+            if not affix.can_apply_to(item_type, rarity):
+                continue
+
+            # Apply tier filter if specified
+            if tier and affix.tier != tier:
+                continue
+
+            eligible.append(affix)
+
+        return eligible
+
+    def get_eligible_suffixes(
+        self,
+        item_type: str,
+        rarity: str,
+        tier: Optional[AffixTier] = None
+    ) -> List[Affix]:
+        """
+        Get all suffixes eligible for an item.
+
+        Args:
+            item_type: Type of item ("weapon", "armor")
+            rarity: Item rarity ("rare", "epic", "legendary")
+            tier: Optional tier filter
+
+        Returns:
+            List of eligible Affix instances
+        """
+        self._ensure_loaded()
+
+        eligible = []
+        for affix in self._suffix_cache.values():
+            # Check if affix can apply to this item
+            if not affix.can_apply_to(item_type, rarity):
+                continue
+
+            # Apply tier filter if specified
+            if tier and affix.tier != tier:
+                continue
+
+            eligible.append(affix)
+
+        return eligible
+
+    def get_random_prefix(
+        self,
+        item_type: str,
+        rarity: str,
+        tier: Optional[AffixTier] = None,
+        exclude_ids: Optional[List[str]] = None
+    ) -> Optional[Affix]:
+        """
+        Get a random eligible prefix.
+
+        Args:
+            item_type: Type of item ("weapon", "armor")
+            rarity: Item rarity
+            tier: Optional tier filter
+            exclude_ids: Affix IDs to exclude (for avoiding duplicates)
+
+        Returns:
+            Random eligible Affix or None if none available
+        """
+        eligible = self.get_eligible_prefixes(item_type, rarity, tier)
+
+        # Filter out excluded IDs
+        if exclude_ids:
+            eligible = [a for a in eligible if a.affix_id not in exclude_ids]
+
+        if not eligible:
+            return None
+
+        return random.choice(eligible)
+
+    def get_random_suffix(
+        self,
+        item_type: str,
+        rarity: str,
+        tier: Optional[AffixTier] = None,
+        exclude_ids: Optional[List[str]] = None
+    ) -> Optional[Affix]:
+        """
+        Get a random eligible suffix.
+
+        Args:
+            item_type: Type of item ("weapon", "armor")
+            rarity: Item rarity
+            tier: Optional tier filter
+            exclude_ids: Affix IDs to exclude (for avoiding duplicates)
+
+        Returns:
+            Random eligible Affix or None if none available
+        """
+        eligible = self.get_eligible_suffixes(item_type, rarity, tier)
+
+        # Filter out excluded IDs
+        if exclude_ids:
+            eligible = [a for a in eligible if a.affix_id not in exclude_ids]
+
+        if not eligible:
+            return None
+
+        return random.choice(eligible)
+
+    def get_all_prefixes(self) -> Dict[str, Affix]:
+        """
+        Get all cached prefixes.
+
+        Returns:
+            Dictionary of prefix affixes
+        """
+        self._ensure_loaded()
+        return self._prefix_cache.copy()
+
+    def get_all_suffixes(self) -> Dict[str, Affix]:
+        """
+        Get all cached suffixes.
+
+        Returns:
+            Dictionary of suffix affixes
+        """
+        self._ensure_loaded()
+        return self._suffix_cache.copy()
+
+    def clear_cache(self) -> None:
+        """Clear the affix cache, forcing reload on next access."""
+        self._prefix_cache.clear()
+        self._suffix_cache.clear()
+        self._loaded = False
+        logger.debug("Affix cache cleared")
+
+
+# Global instance for convenience
+_loader_instance: Optional[AffixLoader] = None
+
+
+def get_affix_loader() -> AffixLoader:
+    """
+    Get the global AffixLoader instance.
+
+    Returns:
+        Singleton AffixLoader instance
+    """
+    global _loader_instance
+    if _loader_instance is None:
+        _loader_instance = AffixLoader()
+    return _loader_instance

api/app/services/base_item_loader.py

@@ -0,0 +1,273 @@
+"""
+Base Item Loader Service - YAML-based base item template loading.
+
+This service loads base item templates (weapons, armor) from YAML files,
+providing the foundation for procedural item generation.
+"""
+
+from pathlib import Path
+from typing import Dict, List, Optional
+import random
+import yaml
+
+from app.models.affixes import BaseItemTemplate
+from app.utils.logging import get_logger
+
+logger = get_logger(__file__)
+
+# Rarity order for comparison
+RARITY_ORDER = {
+    "common": 0,
+    "uncommon": 1,
+    "rare": 2,
+    "epic": 3,
+    "legendary": 4
+}
+
+
+class BaseItemLoader:
+    """
+    Loads and manages base item templates from YAML configuration files.
+
+    This allows game designers to define base items without touching code.
+    Templates are organized into weapons.yaml and armor.yaml files.
+    """
+
+    def __init__(self, data_dir: Optional[str] = None):
+        """
+        Initialize the base item loader.
+
+        Args:
+            data_dir: Path to directory containing base item YAML files
+                     Defaults to /app/data/base_items/
+        """
+        if data_dir is None:
+            # Default to app/data/base_items relative to this file
+            current_file = Path(__file__)
+            app_dir = current_file.parent.parent  # Go up to /app
+            data_dir = str(app_dir / "data" / "base_items")
+
+        self.data_dir = Path(data_dir)
+        self._weapon_cache: Dict[str, BaseItemTemplate] = {}
+        self._armor_cache: Dict[str, BaseItemTemplate] = {}
+        self._loaded = False
+
+        logger.info("BaseItemLoader initialized", data_dir=str(self.data_dir))
+
+    def _ensure_loaded(self) -> None:
+        """Ensure templates are loaded before any operation."""
+        if not self._loaded:
+            self.load_all()
+
+    def load_all(self) -> None:
+        """Load all base item templates from YAML files."""
+        if not self.data_dir.exists():
+            logger.warning("Base item data directory not found", path=str(self.data_dir))
+            return
+
+        # Load weapons
+        weapons_file = self.data_dir / "weapons.yaml"
+        if weapons_file.exists():
+            self._load_templates_from_file(weapons_file, "weapons", self._weapon_cache)
+
+        # Load armor
+        armor_file = self.data_dir / "armor.yaml"
+        if armor_file.exists():
+            self._load_templates_from_file(armor_file, "armor", self._armor_cache)
+
+        self._loaded = True
+        logger.info(
+            "Base item templates loaded",
+            weapon_count=len(self._weapon_cache),
+            armor_count=len(self._armor_cache)
+        )
+
+    def _load_templates_from_file(
+        self,
+        yaml_file: Path,
+        key: str,
+        cache: Dict[str, BaseItemTemplate]
+    ) -> None:
+        """
+        Load templates from a YAML file into the cache.
+
+        Args:
+            yaml_file: Path to the YAML file
+            key: Top-level key in YAML (e.g., "weapons", "armor")
+            cache: Cache dictionary to populate
+        """
+        try:
+            with open(yaml_file, 'r') as f:
+                data = yaml.safe_load(f)
+
+            templates_data = data.get(key, {})
+
+            for template_id, template_data in templates_data.items():
+                # Ensure template_id is set
+                template_data["template_id"] = template_id
+
+                # Set defaults for missing optional fields
+                template_data.setdefault("description", "")
+                template_data.setdefault("base_damage", 0)
+                template_data.setdefault("base_defense", 0)
+                template_data.setdefault("base_resistance", 0)
+                template_data.setdefault("base_value", 10)
+                template_data.setdefault("damage_type", "physical")
+                template_data.setdefault("crit_chance", 0.05)
+                template_data.setdefault("crit_multiplier", 2.0)
+                template_data.setdefault("required_level", 1)
+                template_data.setdefault("drop_weight", 1.0)
+                template_data.setdefault("min_rarity", "common")
+
+                template = BaseItemTemplate.from_dict(template_data)
+                cache[template.template_id] = template
+
+            logger.debug(
+                "Templates loaded from file",
+                file=str(yaml_file),
+                count=len(templates_data)
+            )
+
+        except Exception as e:
+            logger.error(
+                "Failed to load base item file",
+                file=str(yaml_file),
+                error=str(e)
+            )
+
+    def get_template(self, template_id: str) -> Optional[BaseItemTemplate]:
+        """
+        Get a specific template by ID.
+
+        Args:
+            template_id: Unique template identifier
+
+        Returns:
+            BaseItemTemplate instance or None if not found
+        """
+        self._ensure_loaded()
+
+        if template_id in self._weapon_cache:
+            return self._weapon_cache[template_id]
+        if template_id in self._armor_cache:
+            return self._armor_cache[template_id]
+
+        return None
+
+    def get_eligible_templates(
+        self,
+        item_type: str,
+        rarity: str,
+        character_level: int = 1
+    ) -> List[BaseItemTemplate]:
+        """
+        Get all templates eligible for generation.
+
+        Args:
+            item_type: Type of item ("weapon", "armor")
+            rarity: Target rarity
+            character_level: Player level for eligibility
+
+        Returns:
+            List of eligible BaseItemTemplate instances
+        """
+        self._ensure_loaded()
+
+        # Select the appropriate cache
+        if item_type == "weapon":
+            cache = self._weapon_cache
+        elif item_type == "armor":
+            cache = self._armor_cache
+        else:
+            logger.warning("Unknown item type", item_type=item_type)
+            return []
+
+        eligible = []
+        for template in cache.values():
+            # Check level requirement
+            if not template.can_drop_for_level(character_level):
+                continue
+
+            # Check rarity requirement
+            if not template.can_generate_at_rarity(rarity):
+                continue
+
+            eligible.append(template)
+
+        return eligible
+
+    def get_random_template(
+        self,
+        item_type: str,
+        rarity: str,
+        character_level: int = 1
+    ) -> Optional[BaseItemTemplate]:
+        """
+        Get a random eligible template, weighted by drop_weight.
+
+        Args:
+            item_type: Type of item ("weapon", "armor")
+            rarity: Target rarity
+            character_level: Player level for eligibility
+
+        Returns:
+            Random eligible BaseItemTemplate or None if none available
+        """
+        eligible = self.get_eligible_templates(item_type, rarity, character_level)
+
+        if not eligible:
+            logger.warning(
+                "No templates match criteria",
+                item_type=item_type,
+                rarity=rarity,
+                level=character_level
+            )
+            return None
+
+        # Weighted random selection based on drop_weight
+        weights = [t.drop_weight for t in eligible]
+        return random.choices(eligible, weights=weights, k=1)[0]
+
+    def get_all_weapons(self) -> Dict[str, BaseItemTemplate]:
+        """
+        Get all cached weapon templates.
+
+        Returns:
+            Dictionary of weapon templates
+        """
+        self._ensure_loaded()
+        return self._weapon_cache.copy()
+
+    def get_all_armor(self) -> Dict[str, BaseItemTemplate]:
+        """
+        Get all cached armor templates.
+
+        Returns:
+            Dictionary of armor templates
+        """
+        self._ensure_loaded()
+        return self._armor_cache.copy()
+
+    def clear_cache(self) -> None:
+        """Clear the template cache, forcing reload on next access."""
+        self._weapon_cache.clear()
+        self._armor_cache.clear()
+        self._loaded = False
+        logger.debug("Base item template cache cleared")
+
+
+# Global instance for convenience
+_loader_instance: Optional[BaseItemLoader] = None
+
+
+def get_base_item_loader() -> BaseItemLoader:
+    """
+    Get the global BaseItemLoader instance.
+
+    Returns:
+        Singleton BaseItemLoader instance
+    """
+    global _loader_instance
+    if _loader_instance is None:
+        _loader_instance = BaseItemLoader()
+    return _loader_instance

api/app/services/item_generator.py

@@ -0,0 +1,534 @@
+"""
+Item Generator Service - Procedural item generation with affixes.
+
+This service generates Diablo-style items by combining base templates with
+random affixes, creating items like "Flaming Dagger of Strength".
+"""
+
+import uuid
+import random
+from typing import List, Optional, Tuple, Dict, Any
+
+from app.models.items import Item
+from app.models.affixes import Affix, BaseItemTemplate
+from app.models.enums import ItemType, ItemRarity, DamageType, AffixTier
+from app.services.affix_loader import get_affix_loader, AffixLoader
+from app.services.base_item_loader import get_base_item_loader, BaseItemLoader
+from app.utils.logging import get_logger
+
+logger = get_logger(__file__)
+
+# Affix count by rarity (COMMON/UNCOMMON get 0 affixes - plain items)
+AFFIX_COUNTS = {
+    ItemRarity.COMMON: 0,
+    ItemRarity.UNCOMMON: 0,
+    ItemRarity.RARE: 1,
+    ItemRarity.EPIC: 2,
+    ItemRarity.LEGENDARY: 3,
+}
+
+# Tier selection probabilities by rarity
+# Higher rarity items have better chance at higher tier affixes
+TIER_WEIGHTS = {
+    ItemRarity.RARE: {
+        AffixTier.MINOR: 0.8,
+        AffixTier.MAJOR: 0.2,
+        AffixTier.LEGENDARY: 0.0,
+    },
+    ItemRarity.EPIC: {
+        AffixTier.MINOR: 0.3,
+        AffixTier.MAJOR: 0.7,
+        AffixTier.LEGENDARY: 0.0,
+    },
+    ItemRarity.LEGENDARY: {
+        AffixTier.MINOR: 0.1,
+        AffixTier.MAJOR: 0.4,
+        AffixTier.LEGENDARY: 0.5,
+    },
+}
+
+# Rarity value multipliers (higher rarity = more valuable)
+RARITY_VALUE_MULTIPLIER = {
+    ItemRarity.COMMON: 1.0,
+    ItemRarity.UNCOMMON: 1.5,
+    ItemRarity.RARE: 2.5,
+    ItemRarity.EPIC: 5.0,
+    ItemRarity.LEGENDARY: 10.0,
+}
+
+
+class ItemGenerator:
+    """
+    Generates procedural items with Diablo-style naming.
+
+    This service combines base item templates with randomly selected affixes
+    to create unique items with combined stats and generated names.
+    """
+
+    def __init__(
+        self,
+        affix_loader: Optional[AffixLoader] = None,
+        base_item_loader: Optional[BaseItemLoader] = None
+    ):
+        """
+        Initialize the item generator.
+
+        Args:
+            affix_loader: Optional custom AffixLoader instance
+            base_item_loader: Optional custom BaseItemLoader instance
+        """
+        self.affix_loader = affix_loader or get_affix_loader()
+        self.base_item_loader = base_item_loader or get_base_item_loader()
+
+        logger.info("ItemGenerator initialized")
+
+    def generate_item(
+        self,
+        item_type: str,
+        rarity: ItemRarity,
+        character_level: int = 1,
+        base_template_id: Optional[str] = None
+    ) -> Optional[Item]:
+        """
+        Generate a procedural item.
+
+        Args:
+            item_type: "weapon" or "armor"
+            rarity: Target rarity
+            character_level: Player level for template eligibility
+            base_template_id: Optional specific base template to use
+
+        Returns:
+            Generated Item instance or None if generation fails
+        """
+        # 1. Get base template
+        base_template = self._get_base_template(
+            item_type, rarity, character_level, base_template_id
+        )
+        if not base_template:
+            logger.warning(
+                "No base template available",
+                item_type=item_type,
+                rarity=rarity.value,
+                level=character_level
+            )
+            return None
+
+        # 2. Get affix count for this rarity
+        affix_count = AFFIX_COUNTS.get(rarity, 0)
+
+        # 3. Select affixes
+        prefixes, suffixes = self._select_affixes(
+            base_template.item_type, rarity, affix_count
+        )
+
+        # 4. Build the item
+        item = self._build_item(base_template, rarity, prefixes, suffixes)
+
+        logger.info(
+            "Item generated",
+            item_id=item.item_id,
+            name=item.get_display_name(),
+            rarity=rarity.value,
+            affixes=[a.affix_id for a in prefixes + suffixes]
+        )
+
+        return item
+
+    def _get_base_template(
+        self,
+        item_type: str,
+        rarity: ItemRarity,
+        character_level: int,
+        template_id: Optional[str] = None
+    ) -> Optional[BaseItemTemplate]:
+        """
+        Get a base template for item generation.
+
+        Args:
+            item_type: Type of item
+            rarity: Target rarity
+            character_level: Player level
+            template_id: Optional specific template ID
+
+        Returns:
+            BaseItemTemplate instance or None
+        """
+        if template_id:
+            return self.base_item_loader.get_template(template_id)
+
+        return self.base_item_loader.get_random_template(
+            item_type, rarity.value, character_level
+        )
+
+    def _select_affixes(
+        self,
+        item_type: str,
+        rarity: ItemRarity,
+        count: int
+    ) -> Tuple[List[Affix], List[Affix]]:
+        """
+        Select random affixes for an item.
+
+        Distribution logic:
+        - RARE (1 affix): 50% chance prefix, 50% chance suffix
+        - EPIC (2 affixes): 1 prefix AND 1 suffix
+        - LEGENDARY (3 affixes): Mix of prefixes and suffixes
+
+        Args:
+            item_type: Type of item
+            rarity: Item rarity
+            count: Number of affixes to select
+
+        Returns:
+            Tuple of (prefixes, suffixes)
+        """
+        prefixes: List[Affix] = []
+        suffixes: List[Affix] = []
+        used_ids: List[str] = []
+
+        if count == 0:
+            return prefixes, suffixes
+
+        # Determine tier for affix selection
+        tier = self._roll_affix_tier(rarity)
+
+        if count == 1:
+            # RARE: Either prefix OR suffix (50/50)
+            if random.random() < 0.5:
+                prefix = self.affix_loader.get_random_prefix(
+                    item_type, rarity.value, tier, used_ids
+                )
+                if prefix:
+                    prefixes.append(prefix)
+                    used_ids.append(prefix.affix_id)
+            else:
+                suffix = self.affix_loader.get_random_suffix(
+                    item_type, rarity.value, tier, used_ids
+                )
+                if suffix:
+                    suffixes.append(suffix)
+                    used_ids.append(suffix.affix_id)
+
+        elif count == 2:
+            # EPIC: 1 prefix AND 1 suffix
+            tier = self._roll_affix_tier(rarity)
+            prefix = self.affix_loader.get_random_prefix(
+                item_type, rarity.value, tier, used_ids
+            )
+            if prefix:
+                prefixes.append(prefix)
+                used_ids.append(prefix.affix_id)
+
+            tier = self._roll_affix_tier(rarity)
+            suffix = self.affix_loader.get_random_suffix(
+                item_type, rarity.value, tier, used_ids
+            )
+            if suffix:
+                suffixes.append(suffix)
+                used_ids.append(suffix.affix_id)
+
+        elif count >= 3:
+            # LEGENDARY: Mix of prefixes and suffixes
+            # Try: 2 prefixes + 1 suffix OR 1 prefix + 2 suffixes
+            distribution = random.choice([(2, 1), (1, 2)])
+            prefix_count, suffix_count = distribution
+
+            for _ in range(prefix_count):
+                tier = self._roll_affix_tier(rarity)
+                prefix = self.affix_loader.get_random_prefix(
+                    item_type, rarity.value, tier, used_ids
+                )
+                if prefix:
+                    prefixes.append(prefix)
+                    used_ids.append(prefix.affix_id)
+
+            for _ in range(suffix_count):
+                tier = self._roll_affix_tier(rarity)
+                suffix = self.affix_loader.get_random_suffix(
+                    item_type, rarity.value, tier, used_ids
+                )
+                if suffix:
+                    suffixes.append(suffix)
+                    used_ids.append(suffix.affix_id)
+
+        return prefixes, suffixes
+
+    def _roll_affix_tier(self, rarity: ItemRarity) -> Optional[AffixTier]:
+        """
+        Roll for affix tier based on item rarity.
+
+        Args:
+            rarity: Item rarity
+
+        Returns:
+            Selected AffixTier or None for no tier filter
+        """
+        weights = TIER_WEIGHTS.get(rarity)
+        if not weights:
+            return None
+
+        tiers = list(weights.keys())
+        tier_weights = list(weights.values())
+
+        # Filter out zero-weight options
+        valid_tiers = []
+        valid_weights = []
+        for t, w in zip(tiers, tier_weights):
+            if w > 0:
+                valid_tiers.append(t)
+                valid_weights.append(w)
+
+        if not valid_tiers:
+            return None
+
+        return random.choices(valid_tiers, weights=valid_weights, k=1)[0]
+
+    def _build_item(
+        self,
+        base_template: BaseItemTemplate,
+        rarity: ItemRarity,
+        prefixes: List[Affix],
+        suffixes: List[Affix]
+    ) -> Item:
+        """
+        Build an Item from base template and affixes.
+
+        Args:
+            base_template: Base item template
+            rarity: Item rarity
+            prefixes: List of prefix affixes
+            suffixes: List of suffix affixes
+
+        Returns:
+            Fully constructed Item instance
+        """
+        # Generate unique ID
+        item_id = f"gen_{uuid.uuid4().hex[:12]}"
+
+        # Build generated name
+        generated_name = self._build_name(base_template.name, prefixes, suffixes)
+
+        # Combine stats from all affixes
+        combined_stats = self._combine_affix_stats(prefixes + suffixes)
+
+        # Calculate final item values
+        item_type = ItemType.WEAPON if base_template.item_type == "weapon" else ItemType.ARMOR
+
+        # Base values from template
+        damage = base_template.base_damage + combined_stats["damage_bonus"]
+        defense = base_template.base_defense + combined_stats["defense_bonus"]
+        resistance = base_template.base_resistance + combined_stats["resistance_bonus"]
+        crit_chance = base_template.crit_chance + combined_stats["crit_chance_bonus"]
+        crit_multiplier = base_template.crit_multiplier + combined_stats["crit_multiplier_bonus"]
+
+        # Calculate value with rarity multiplier
+        base_value = base_template.base_value
+        rarity_mult = RARITY_VALUE_MULTIPLIER.get(rarity, 1.0)
+        # Add value for each affix
+        affix_value = len(prefixes + suffixes) * 25
+        final_value = int((base_value + affix_value) * rarity_mult)
+
+        # Determine elemental damage type (from prefix affixes)
+        elemental_damage_type = None
+        elemental_ratio = 0.0
+        for prefix in prefixes:
+            if prefix.applies_elemental_damage():
+                elemental_damage_type = prefix.damage_type
+                elemental_ratio = prefix.elemental_ratio
+                break  # Use first elemental prefix
+
+        # Track applied affixes
+        applied_affixes = [a.affix_id for a in prefixes + suffixes]
+
+        # Create the item
+        item = Item(
+            item_id=item_id,
+            name=base_template.name,  # Base name
+            item_type=item_type,
+            rarity=rarity,
+            description=base_template.description,
+            value=final_value,
+            is_tradeable=True,
+            stat_bonuses=combined_stats["stat_bonuses"],
+            effects_on_use=[],  # Not a consumable
+            damage=damage,
+            damage_type=DamageType(base_template.damage_type) if damage > 0 else None,
+            crit_chance=crit_chance,
+            crit_multiplier=crit_multiplier,
+            elemental_damage_type=elemental_damage_type,
+            physical_ratio=1.0 - elemental_ratio if elemental_ratio > 0 else 1.0,
+            elemental_ratio=elemental_ratio,
+            defense=defense,
+            resistance=resistance,
+            required_level=base_template.required_level,
+            required_class=None,
+            # Affix tracking
+            applied_affixes=applied_affixes,
+            base_template_id=base_template.template_id,
+            generated_name=generated_name,
+            is_generated=True,
+        )
+
+        return item
+
+    def _build_name(
+        self,
+        base_name: str,
+        prefixes: List[Affix],
+        suffixes: List[Affix]
+    ) -> str:
+        """
+        Build the full item name with affixes.
+
+        Examples:
+        - RARE (1 prefix): "Flaming Dagger"
+        - RARE (1 suffix): "Dagger of Strength"
+        - EPIC: "Flaming Dagger of Strength"
+        - LEGENDARY: "Blazing Glacial Dagger of the Titan"
+
+        Note: Rarity is NOT included in name (shown via UI).
+
+        Args:
+            base_name: Base item name (e.g., "Dagger")
+            prefixes: List of prefix affixes
+            suffixes: List of suffix affixes
+
+        Returns:
+            Full generated name string
+        """
+        parts = []
+
+        # Add prefix names (in order)
+        for prefix in prefixes:
+            parts.append(prefix.name)
+
+        # Add base name
+        parts.append(base_name)
+
+        # Build name string from parts
+        name = " ".join(parts)
+
+        # Add suffix names (they include "of")
+        for suffix in suffixes:
+            name += f" {suffix.name}"
+
+        return name
+
+    def _combine_affix_stats(self, affixes: List[Affix]) -> Dict[str, Any]:
+        """
+        Combine stats from multiple affixes.
+
+        Args:
+            affixes: List of affixes to combine
+
+        Returns:
+            Dictionary with combined stat values
+        """
+        combined = {
+            "stat_bonuses": {},
+            "damage_bonus": 0,
+            "defense_bonus": 0,
+            "resistance_bonus": 0,
+            "crit_chance_bonus": 0.0,
+            "crit_multiplier_bonus": 0.0,
+        }
+
+        for affix in affixes:
+            # Combine stat bonuses
+            for stat_name, bonus in affix.stat_bonuses.items():
+                current = combined["stat_bonuses"].get(stat_name, 0)
+                combined["stat_bonuses"][stat_name] = current + bonus
+
+            # Combine direct bonuses
+            combined["damage_bonus"] += affix.damage_bonus
+            combined["defense_bonus"] += affix.defense_bonus
+            combined["resistance_bonus"] += affix.resistance_bonus
+            combined["crit_chance_bonus"] += affix.crit_chance_bonus
+            combined["crit_multiplier_bonus"] += affix.crit_multiplier_bonus
+
+        return combined
+
+    def generate_loot_drop(
+        self,
+        character_level: int,
+        luck_stat: int = 8,
+        item_type: Optional[str] = None
+    ) -> Optional[Item]:
+        """
+        Generate a random loot drop with luck-influenced rarity.
+
+        Args:
+            character_level: Player level
+            luck_stat: Player's luck stat (affects rarity chance)
+            item_type: Optional item type filter
+
+        Returns:
+            Generated Item or None
+        """
+        # Choose random item type if not specified
+        if item_type is None:
+            item_type = random.choice(["weapon", "armor"])
+
+        # Roll rarity with luck bonus
+        rarity = self._roll_rarity(luck_stat)
+
+        return self.generate_item(item_type, rarity, character_level)
+
+    def _roll_rarity(self, luck_stat: int) -> ItemRarity:
+        """
+        Roll item rarity with luck bonus.
+
+        Base chances (luck 8):
+        - COMMON: 50%
+        - UNCOMMON: 30%
+        - RARE: 15%
+        - EPIC: 4%
+        - LEGENDARY: 1%
+
+        Luck modifies these chances slightly.
+
+        Args:
+            luck_stat: Player's luck stat
+
+        Returns:
+            Rolled ItemRarity
+        """
+        # Calculate luck bonus (luck 8 = baseline)
+        luck_bonus = (luck_stat - 8) * 0.005
+
+        roll = random.random()
+
+        # Thresholds (cumulative)
+        legendary_threshold = 0.01 + luck_bonus
+        epic_threshold = legendary_threshold + 0.04 + luck_bonus * 2
+        rare_threshold = epic_threshold + 0.15 + luck_bonus * 3
+        uncommon_threshold = rare_threshold + 0.30
+
+        if roll < legendary_threshold:
+            return ItemRarity.LEGENDARY
+        elif roll < epic_threshold:
+            return ItemRarity.EPIC
+        elif roll < rare_threshold:
+            return ItemRarity.RARE
+        elif roll < uncommon_threshold:
+            return ItemRarity.UNCOMMON
+        else:
+            return ItemRarity.COMMON
+
+
+# Global instance for convenience
+_generator_instance: Optional[ItemGenerator] = None
+
+
+def get_item_generator() -> ItemGenerator:
+    """
+    Get the global ItemGenerator instance.
+
+    Returns:
+        Singleton ItemGenerator instance
+    """
+    global _generator_instance
+    if _generator_instance is None:
+        _generator_instance = ItemGenerator()
+    return _generator_instance

api/tests/test_item_generator.py

@@ -0,0 +1,527 @@
+"""
+Tests for the Item Generator and Affix System.
+
+Tests cover:
+- Affix loading from YAML
+- Base item template loading
+- Item generation with affixes
+- Name generation
+- Stat combination
+"""
+
+import pytest
+from unittest.mock import patch, MagicMock
+
+from app.models.affixes import Affix, BaseItemTemplate
+from app.models.enums import AffixType, AffixTier, ItemRarity, ItemType, DamageType
+from app.services.affix_loader import AffixLoader, get_affix_loader
+from app.services.base_item_loader import BaseItemLoader, get_base_item_loader
+from app.services.item_generator import ItemGenerator, get_item_generator
+
+
+class TestAffixModel:
+    """Tests for the Affix dataclass."""
+
+    def test_affix_creation(self):
+        """Test creating an Affix instance."""
+        affix = Affix(
+            affix_id="flaming",
+            name="Flaming",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+            description="Fire damage",
+            damage_type=DamageType.FIRE,
+            elemental_ratio=0.25,
+            damage_bonus=3,
+        )
+
+        assert affix.affix_id == "flaming"
+        assert affix.name == "Flaming"
+        assert affix.affix_type == AffixType.PREFIX
+        assert affix.tier == AffixTier.MINOR
+        assert affix.applies_elemental_damage()
+
+    def test_affix_can_apply_to(self):
+        """Test affix eligibility checking."""
+        # Weapon-only affix
+        weapon_affix = Affix(
+            affix_id="sharp",
+            name="Sharp",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+            allowed_item_types=["weapon"],
+        )
+
+        assert weapon_affix.can_apply_to("weapon", "rare")
+        assert not weapon_affix.can_apply_to("armor", "rare")
+
+    def test_affix_legendary_only(self):
+        """Test legendary-only affix restriction."""
+        legendary_affix = Affix(
+            affix_id="vorpal",
+            name="Vorpal",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.LEGENDARY,
+            required_rarity="legendary",
+        )
+
+        assert legendary_affix.is_legendary_only()
+        assert legendary_affix.can_apply_to("weapon", "legendary")
+        assert not legendary_affix.can_apply_to("weapon", "epic")
+
+    def test_affix_serialization(self):
+        """Test affix to_dict and from_dict."""
+        affix = Affix(
+            affix_id="of_strength",
+            name="of Strength",
+            affix_type=AffixType.SUFFIX,
+            tier=AffixTier.MINOR,
+            stat_bonuses={"strength": 2},
+        )
+
+        data = affix.to_dict()
+        restored = Affix.from_dict(data)
+
+        assert restored.affix_id == affix.affix_id
+        assert restored.name == affix.name
+        assert restored.stat_bonuses == affix.stat_bonuses
+
+
+class TestBaseItemTemplate:
+    """Tests for the BaseItemTemplate dataclass."""
+
+    def test_template_creation(self):
+        """Test creating a BaseItemTemplate instance."""
+        template = BaseItemTemplate(
+            template_id="dagger",
+            name="Dagger",
+            item_type="weapon",
+            base_damage=6,
+            base_value=15,
+            crit_chance=0.08,
+            required_level=1,
+        )
+
+        assert template.template_id == "dagger"
+        assert template.base_damage == 6
+        assert template.crit_chance == 0.08
+
+    def test_template_rarity_eligibility(self):
+        """Test template rarity checking."""
+        template = BaseItemTemplate(
+            template_id="plate_armor",
+            name="Plate Armor",
+            item_type="armor",
+            min_rarity="rare",
+        )
+
+        assert template.can_generate_at_rarity("rare")
+        assert template.can_generate_at_rarity("epic")
+        assert template.can_generate_at_rarity("legendary")
+        assert not template.can_generate_at_rarity("common")
+        assert not template.can_generate_at_rarity("uncommon")
+
+    def test_template_level_eligibility(self):
+        """Test template level checking."""
+        template = BaseItemTemplate(
+            template_id="greatsword",
+            name="Greatsword",
+            item_type="weapon",
+            required_level=5,
+        )
+
+        assert template.can_drop_for_level(5)
+        assert template.can_drop_for_level(10)
+        assert not template.can_drop_for_level(4)
+
+
+class TestAffixLoader:
+    """Tests for the AffixLoader service."""
+
+    def test_loader_initialization(self):
+        """Test AffixLoader initializes correctly."""
+        loader = get_affix_loader()
+        assert loader is not None
+
+    def test_load_prefixes(self):
+        """Test loading prefixes from YAML."""
+        loader = get_affix_loader()
+        loader.load_all()
+
+        prefixes = loader.get_all_prefixes()
+        assert len(prefixes) > 0
+
+        # Check for known prefix
+        flaming = loader.get_affix("flaming")
+        assert flaming is not None
+        assert flaming.affix_type == AffixType.PREFIX
+        assert flaming.name == "Flaming"
+
+    def test_load_suffixes(self):
+        """Test loading suffixes from YAML."""
+        loader = get_affix_loader()
+        loader.load_all()
+
+        suffixes = loader.get_all_suffixes()
+        assert len(suffixes) > 0
+
+        # Check for known suffix
+        of_strength = loader.get_affix("of_strength")
+        assert of_strength is not None
+        assert of_strength.affix_type == AffixType.SUFFIX
+        assert of_strength.name == "of Strength"
+
+    def test_get_eligible_prefixes(self):
+        """Test filtering eligible prefixes."""
+        loader = get_affix_loader()
+
+        # Get weapon prefixes for rare items
+        eligible = loader.get_eligible_prefixes("weapon", "rare")
+        assert len(eligible) > 0
+
+        # All should be applicable to weapons
+        for prefix in eligible:
+            assert prefix.can_apply_to("weapon", "rare")
+
+    def test_get_random_prefix(self):
+        """Test random prefix selection."""
+        loader = get_affix_loader()
+
+        prefix = loader.get_random_prefix("weapon", "rare")
+        assert prefix is not None
+        assert prefix.affix_type == AffixType.PREFIX
+
+
+class TestBaseItemLoader:
+    """Tests for the BaseItemLoader service."""
+
+    def test_loader_initialization(self):
+        """Test BaseItemLoader initializes correctly."""
+        loader = get_base_item_loader()
+        assert loader is not None
+
+    def test_load_weapons(self):
+        """Test loading weapon templates from YAML."""
+        loader = get_base_item_loader()
+        loader.load_all()
+
+        weapons = loader.get_all_weapons()
+        assert len(weapons) > 0
+
+        # Check for known weapon
+        dagger = loader.get_template("dagger")
+        assert dagger is not None
+        assert dagger.item_type == "weapon"
+        assert dagger.base_damage > 0
+
+    def test_load_armor(self):
+        """Test loading armor templates from YAML."""
+        loader = get_base_item_loader()
+        loader.load_all()
+
+        armor = loader.get_all_armor()
+        assert len(armor) > 0
+
+        # Check for known armor
+        chainmail = loader.get_template("chainmail")
+        assert chainmail is not None
+        assert chainmail.item_type == "armor"
+        assert chainmail.base_defense > 0
+
+    def test_get_eligible_templates(self):
+        """Test filtering eligible templates."""
+        loader = get_base_item_loader()
+
+        # Get weapons for level 1, common rarity
+        eligible = loader.get_eligible_templates("weapon", "common", 1)
+        assert len(eligible) > 0
+
+        # All should be eligible
+        for template in eligible:
+            assert template.can_drop_for_level(1)
+            assert template.can_generate_at_rarity("common")
+
+    def test_get_random_template(self):
+        """Test random template selection."""
+        loader = get_base_item_loader()
+
+        template = loader.get_random_template("weapon", "common", 1)
+        assert template is not None
+        assert template.item_type == "weapon"
+
+
+class TestItemGenerator:
+    """Tests for the ItemGenerator service."""
+
+    def test_generator_initialization(self):
+        """Test ItemGenerator initializes correctly."""
+        generator = get_item_generator()
+        assert generator is not None
+
+    def test_generate_common_item(self):
+        """Test generating a common item (no affixes)."""
+        generator = get_item_generator()
+
+        item = generator.generate_item("weapon", ItemRarity.COMMON, 1)
+        assert item is not None
+        assert item.rarity == ItemRarity.COMMON
+        assert item.is_generated
+        assert len(item.applied_affixes) == 0
+        # Common items have no generated name
+        assert item.generated_name == item.name
+
+    def test_generate_rare_item(self):
+        """Test generating a rare item (1 affix)."""
+        generator = get_item_generator()
+
+        item = generator.generate_item("weapon", ItemRarity.RARE, 1)
+        assert item is not None
+        assert item.rarity == ItemRarity.RARE
+        assert item.is_generated
+        assert len(item.applied_affixes) == 1
+        assert item.generated_name != item.name
+
+    def test_generate_epic_item(self):
+        """Test generating an epic item (2 affixes)."""
+        generator = get_item_generator()
+
+        item = generator.generate_item("weapon", ItemRarity.EPIC, 1)
+        assert item is not None
+        assert item.rarity == ItemRarity.EPIC
+        assert item.is_generated
+        assert len(item.applied_affixes) == 2
+
+    def test_generate_legendary_item(self):
+        """Test generating a legendary item (3 affixes)."""
+        generator = get_item_generator()
+
+        item = generator.generate_item("weapon", ItemRarity.LEGENDARY, 5)
+        assert item is not None
+        assert item.rarity == ItemRarity.LEGENDARY
+        assert item.is_generated
+        assert len(item.applied_affixes) == 3
+
+    def test_generated_name_format(self):
+        """Test that generated names follow the expected format."""
+        generator = get_item_generator()
+
+        # Generate multiple items and check name patterns
+        for _ in range(10):
+            item = generator.generate_item("weapon", ItemRarity.EPIC, 1)
+            if item:
+                name = item.get_display_name()
+                # EPIC should have both prefix and suffix (typically)
+                # Name should contain the base item name
+                assert item.name in name or item.base_template_id in name.lower()
+
+    def test_stat_combination(self):
+        """Test that affix stats are properly combined."""
+        generator = get_item_generator()
+
+        # Generate items and verify stat bonuses are present
+        for _ in range(5):
+            item = generator.generate_item("weapon", ItemRarity.RARE, 1)
+            if item and item.applied_affixes:
+                # Item should have some stat modifications
+                # Either stat_bonuses, damage_bonus, or elemental properties
+                has_stats = (
+                    bool(item.stat_bonuses) or
+                    item.damage > 0 or
+                    item.elemental_ratio > 0
+                )
+                assert has_stats
+
+    def test_generate_armor(self):
+        """Test generating armor items."""
+        generator = get_item_generator()
+
+        item = generator.generate_item("armor", ItemRarity.RARE, 1)
+        assert item is not None
+        assert item.item_type == ItemType.ARMOR
+        assert item.defense > 0 or item.resistance > 0
+
+    def test_generate_loot_drop(self):
+        """Test random loot drop generation."""
+        generator = get_item_generator()
+
+        # Generate multiple drops to test randomness
+        rarities_seen = set()
+        for _ in range(50):
+            item = generator.generate_loot_drop(5, luck_stat=8)
+            if item:
+                rarities_seen.add(item.rarity)
+
+        # Should see at least common and uncommon
+        assert ItemRarity.COMMON in rarities_seen or ItemRarity.UNCOMMON in rarities_seen
+
+    def test_luck_affects_rarity(self):
+        """Test that higher luck increases rare drops."""
+        generator = get_item_generator()
+
+        # This is a statistical test - higher luck should trend toward better rarity
+        low_luck_rares = 0
+        high_luck_rares = 0
+
+        for _ in range(100):
+            low_luck_item = generator.generate_loot_drop(5, luck_stat=1)
+            high_luck_item = generator.generate_loot_drop(5, luck_stat=20)
+
+            if low_luck_item and low_luck_item.rarity in [ItemRarity.RARE, ItemRarity.EPIC, ItemRarity.LEGENDARY]:
+                low_luck_rares += 1
+            if high_luck_item and high_luck_item.rarity in [ItemRarity.RARE, ItemRarity.EPIC, ItemRarity.LEGENDARY]:
+                high_luck_rares += 1
+
+        # High luck should generally produce more rare+ items
+        # (This may occasionally fail due to randomness, but should pass most of the time)
+        # We're just checking the trend, not a strict guarantee
+        # logger.info(f"Low luck rares: {low_luck_rares}, High luck rares: {high_luck_rares}")
+
+
+class TestNameGeneration:
+    """Tests specifically for item name generation."""
+
+    def test_prefix_only_name(self):
+        """Test name with only a prefix."""
+        generator = get_item_generator()
+
+        # Create mock affixes
+        prefix = Affix(
+            affix_id="flaming",
+            name="Flaming",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+        )
+
+        name = generator._build_name("Dagger", [prefix], [])
+        assert name == "Flaming Dagger"
+
+    def test_suffix_only_name(self):
+        """Test name with only a suffix."""
+        generator = get_item_generator()
+
+        suffix = Affix(
+            affix_id="of_strength",
+            name="of Strength",
+            affix_type=AffixType.SUFFIX,
+            tier=AffixTier.MINOR,
+        )
+
+        name = generator._build_name("Dagger", [], [suffix])
+        assert name == "Dagger of Strength"
+
+    def test_full_name(self):
+        """Test name with prefix and suffix."""
+        generator = get_item_generator()
+
+        prefix = Affix(
+            affix_id="flaming",
+            name="Flaming",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+        )
+        suffix = Affix(
+            affix_id="of_strength",
+            name="of Strength",
+            affix_type=AffixType.SUFFIX,
+            tier=AffixTier.MINOR,
+        )
+
+        name = generator._build_name("Dagger", [prefix], [suffix])
+        assert name == "Flaming Dagger of Strength"
+
+    def test_multiple_prefixes(self):
+        """Test name with multiple prefixes."""
+        generator = get_item_generator()
+
+        prefix1 = Affix(
+            affix_id="flaming",
+            name="Flaming",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+        )
+        prefix2 = Affix(
+            affix_id="sharp",
+            name="Sharp",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+        )
+
+        name = generator._build_name("Dagger", [prefix1, prefix2], [])
+        assert name == "Flaming Sharp Dagger"
+
+
+class TestStatCombination:
+    """Tests for combining affix stats."""
+
+    def test_combine_stat_bonuses(self):
+        """Test combining stat bonuses from multiple affixes."""
+        generator = get_item_generator()
+
+        affix1 = Affix(
+            affix_id="test1",
+            name="Test1",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+            stat_bonuses={"strength": 2, "constitution": 1},
+        )
+        affix2 = Affix(
+            affix_id="test2",
+            name="Test2",
+            affix_type=AffixType.SUFFIX,
+            tier=AffixTier.MINOR,
+            stat_bonuses={"strength": 3, "dexterity": 2},
+        )
+
+        combined = generator._combine_affix_stats([affix1, affix2])
+
+        assert combined["stat_bonuses"]["strength"] == 5
+        assert combined["stat_bonuses"]["constitution"] == 1
+        assert combined["stat_bonuses"]["dexterity"] == 2
+
+    def test_combine_damage_bonuses(self):
+        """Test combining damage bonuses."""
+        generator = get_item_generator()
+
+        affix1 = Affix(
+            affix_id="sharp",
+            name="Sharp",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+            damage_bonus=3,
+        )
+        affix2 = Affix(
+            affix_id="keen",
+            name="Keen",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MAJOR,
+            damage_bonus=5,
+        )
+
+        combined = generator._combine_affix_stats([affix1, affix2])
+
+        assert combined["damage_bonus"] == 8
+
+    def test_combine_crit_bonuses(self):
+        """Test combining crit chance and multiplier bonuses."""
+        generator = get_item_generator()
+
+        affix1 = Affix(
+            affix_id="sharp",
+            name="Sharp",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MINOR,
+            crit_chance_bonus=0.02,
+        )
+        affix2 = Affix(
+            affix_id="keen",
+            name="Keen",
+            affix_type=AffixType.PREFIX,
+            tier=AffixTier.MAJOR,
+            crit_chance_bonus=0.04,
+            crit_multiplier_bonus=0.5,
+        )
+
+        combined = generator._combine_affix_stats([affix1, affix2])
+
+        assert combined["crit_chance_bonus"] == pytest.approx(0.06)
+        assert combined["crit_multiplier_bonus"] == pytest.approx(0.5)