Add weapon stat modifiers for AX skills and befoulments (#202)

* add weapon_stat_modifiers table for ax skills and befoulments * add fk columns for ax modifiers and befoulments, replace has_ax_skills with augment_type * update models for weapon_stat_modifier fks and befoulments * update blueprints for weapon_stat_modifier serialization * update import service for weapon_stat_modifier fks and befoulments * add weapon_stat_modifiers controller and update params for fks * update tests and factories for weapon_stat_modifier fks * fix remaining has_ax_skills and ax_modifier references * add ax_modifier and befoulment_modifier to eager loading * fix ax modifier column naming and migration approach * add game_skill_ids for befoulment modifiers
2025-12-31 22:20:00 -08:00 · 2025-12-31 22:20:00 -08:00 · 1f80e4189f
commit 1f80e4189f
parent a6b7e26210
38 changed files with 1596 additions and 122 deletions
--- a/app/blueprints/api/v1/collection_weapon_blueprint.rb
+++ b/app/blueprints/api/v1/collection_weapon_blueprint.rb
@ -7,10 +7,28 @@ module Api
             :created_at, :updated_at
      field :ax, if: ->(_, obj, _) { obj.ax_modifier1.present? } do |obj|
-        [
+        skills = []
-          { modifier: obj.ax_modifier1, strength: obj.ax_strength1 },
+        if obj.ax_modifier1.present?
-          { modifier: obj.ax_modifier2, strength: obj.ax_strength2 }
+          skills << {
-        ].compact_blank
+            modifier: WeaponStatModifierBlueprint.render_as_hash(obj.ax_modifier1),
            strength: obj.ax_strength1
          }
        end
        if obj.ax_modifier2.present?
          skills << {
            modifier: WeaponStatModifierBlueprint.render_as_hash(obj.ax_modifier2),
            strength: obj.ax_strength2
          }
        end
        skills
      end
      field :befoulment, if: ->(_, obj, _) { obj.befoulment_modifier.present? } do |obj|
        {
          modifier: WeaponStatModifierBlueprint.render_as_hash(obj.befoulment_modifier),
          strength: obj.befoulment_strength,
          exorcism_level: obj.exorcism_level
        }
      end
      field :awakening, if: ->(_, obj, _) { obj.awakening.present? } do |obj|
--- a/app/blueprints/api/v1/grid_weapon_blueprint.rb
+++ b/app/blueprints/api/v1/grid_weapon_blueprint.rb
@ -15,11 +15,29 @@ module Api
      end
      view :nested do
-        field :ax, if: ->(_field_name, w, _options) { w.weapon.present? && w.weapon.ax } do |w|
+        field :ax, if: ->(_field_name, w, _options) { w.ax_modifier1.present? } do |w|
-          [
+          skills = []
-            { modifier: w.ax_modifier1, strength: w.ax_strength1 },
+          if w.ax_modifier1.present?
-            { modifier: w.ax_modifier2, strength: w.ax_strength2 }
+            skills << {
-          ]
+              modifier: WeaponStatModifierBlueprint.render_as_hash(w.ax_modifier1),
              strength: w.ax_strength1
            }
          end
          if w.ax_modifier2.present?
            skills << {
              modifier: WeaponStatModifierBlueprint.render_as_hash(w.ax_modifier2),
              strength: w.ax_strength2
            }
          end
          skills
        end
        field :befoulment, if: ->(_field_name, w, _options) { w.befoulment_modifier.present? } do |w|
          {
            modifier: WeaponStatModifierBlueprint.render_as_hash(w.befoulment_modifier),
            strength: w.befoulment_strength,
            exorcism_level: w.exorcism_level
          }
        end
        field :awakening, if: ->(_field_name, w, _options) { w.awakening.present? } do |w|
--- a/app/blueprints/api/v1/weapon_blueprint.rb
+++ b/app/blueprints/api/v1/weapon_blueprint.rb
@ -27,7 +27,7 @@ module Api
            },
            has_weapon_keys: w.weapon_series.has_weapon_keys,
            has_awakening: w.weapon_series.has_awakening,
-            has_ax_skills: w.weapon_series.has_ax_skills,
+            augment_type: w.weapon_series.augment_type,
            extra: w.weapon_series.extra,
            element_changeable: w.weapon_series.element_changeable
          }
--- a/app/blueprints/api/v1/weapon_series_blueprint.rb
+++ b/app/blueprints/api/v1/weapon_series_blueprint.rb
@ -11,7 +11,7 @@ module Api
      end
      fields :slug, :order, :extra, :element_changeable, :has_weapon_keys,
-             :has_awakening, :has_ax_skills
+             :has_awakening, :augment_type
      view :full do
        field :weapon_count do |ws|
--- a/app/blueprints/api/v1/weapon_stat_modifier_blueprint.rb
+++ b/app/blueprints/api/v1/weapon_stat_modifier_blueprint.rb
@ -0,0 +1,10 @@
 # frozen_string_literal: true
 module Api
  module V1
    class WeaponStatModifierBlueprint < Blueprinter::Base
      identifier :id
      fields :slug, :name_en, :name_jp, :category, :stat, :polarity, :suffix
    end
  end
 end
--- a/app/controllers/api/v1/collection_weapons_controller.rb
+++ b/app/controllers/api/v1/collection_weapons_controller.rb
@ -14,7 +14,9 @@ module Api
        @collection_weapons = @target_user.collection_weapons
                                          .includes(:weapon, :awakening,
                                                   :weapon_key1, :weapon_key2,
-                                                   :weapon_key3, :weapon_key4)
+                                                   :weapon_key3, :weapon_key4,
                                                   :ax_modifier1, :ax_modifier2,
                                                   :befoulment_modifier)
        # Apply filters (array_param splits comma-separated values for OR logic)
        @collection_weapons = @collection_weapons.by_weapon(params[:weapon_id]) if params[:weapon_id]
@ -212,7 +214,8 @@ module Api
          :weapon_id, :uncap_level, :transcendence_step,
          :weapon_key1_id, :weapon_key2_id, :weapon_key3_id, :weapon_key4_id,
          :awakening_id, :awakening_level,
-          :ax_modifier1, :ax_strength1, :ax_modifier2, :ax_strength2,
+          :ax_modifier1_id, :ax_strength1, :ax_modifier2_id, :ax_strength2,
          :befoulment_modifier_id, :befoulment_strength, :exorcism_level,
          :element
        )
      end
@ -222,7 +225,8 @@ module Api
          :weapon_id, :uncap_level, :transcendence_step,
          :weapon_key1_id, :weapon_key2_id, :weapon_key3_id, :weapon_key4_id,
          :awakening_id, :awakening_level,
-          :ax_modifier1, :ax_strength1, :ax_modifier2, :ax_strength2,
+          :ax_modifier1_id, :ax_strength1, :ax_modifier2_id, :ax_strength2,
          :befoulment_modifier_id, :befoulment_strength, :exorcism_level,
          :element
        ])
      end
--- a/app/controllers/api/v1/grid_weapons_controller.rb
+++ b/app/controllers/api/v1/grid_weapons_controller.rb
@ -291,13 +291,13 @@ module Api
      ##
      # Normalizes the AX modifier fields for the weapon parameters.
      #
-      # Sets ax_modifier1 and ax_modifier2 to nil if their integer values equal -1.
+      # Sets ax_modifier1_id and ax_modifier2_id to nil if their integer values equal -1.
      #
      # @return [void]
      def normalize_ax_fields!
-        params[:weapon][:ax_modifier1] = nil if weapon_params[:ax_modifier1].to_i == -1
+        params[:weapon][:ax_modifier1_id] = nil if weapon_params[:ax_modifier1_id].to_i == -1
-
+        params[:weapon][:ax_modifier2_id] = nil if weapon_params[:ax_modifier2_id].to_i == -1
-        params[:weapon][:ax_modifier2] = nil if weapon_params[:ax_modifier2].to_i == -1
+        params[:weapon][:befoulment_modifier_id] = nil if weapon_params[:befoulment_modifier_id].to_i == -1
      end
      ##
@ -515,7 +515,8 @@ module Api
          :id, :party_id, :weapon_id, :collection_weapon_id,
          :position, :mainhand, :uncap_level, :transcendence_step, :element,
          :weapon_key1_id, :weapon_key2_id, :weapon_key3_id,
-          :ax_modifier1, :ax_modifier2, :ax_strength1, :ax_strength2,
+          :ax_modifier1_id, :ax_modifier2_id, :ax_strength1, :ax_strength2,
          :befoulment_modifier_id, :befoulment_strength, :exorcism_level,
          :awakening_id, :awakening_level
        )
      end
--- a/app/controllers/api/v1/parties_controller.rb
+++ b/app/controllers/api/v1/parties_controller.rb
@ -266,7 +266,10 @@ module Api
            awakening: {},
            weapon_key1: {},
            weapon_key2: {},
-            weapon_key3: {}
+            weapon_key3: {},
            ax_modifier1: {},
            ax_modifier2: {},
            befoulment_modifier: {}
          } },
          { summons: :summon },
          :guidebook1, :guidebook2, :guidebook3,
@ -294,7 +297,7 @@ module Api
                                  { ring1: %i[modifier strength], ring2: %i[modifier strength], ring3: %i[modifier strength], ring4: %i[modifier strength],
                                    earring: %i[modifier strength] }],
          summons_attributes: %i[id party_id summon_id position main friend quick_summon uncap_level transcendence_step],
-          weapons_attributes: %i[id party_id weapon_id position mainhand uncap_level transcendence_step element weapon_key1_id weapon_key2_id weapon_key3_id ax_modifier1 ax_modifier2 ax_strength1 ax_strength2 awakening_id awakening_level]
+          weapons_attributes: %i[id party_id weapon_id position mainhand uncap_level transcendence_step element weapon_key1_id weapon_key2_id weapon_key3_id ax_modifier1_id ax_modifier2_id ax_strength1 ax_strength2 befoulment_modifier_id befoulment_strength exorcism_level awakening_id awakening_level]
        )
      end
--- a/app/controllers/api/v1/weapon_series_controller.rb
+++ b/app/controllers/api/v1/weapon_series_controller.rb
@ -68,7 +68,7 @@ module Api
        params.require(:weapon_series).permit(
          :name_en, :name_jp, :slug, :order,
          :extra, :element_changeable, :has_weapon_keys,
-          :has_awakening, :has_ax_skills
+          :has_awakening, :augment_type
        )
      end
    end
--- a/app/controllers/api/v1/weapon_stat_modifiers_controller.rb
+++ b/app/controllers/api/v1/weapon_stat_modifiers_controller.rb
@ -0,0 +1,21 @@
 # frozen_string_literal: true
 module Api
  module V1
    class WeaponStatModifiersController < Api::V1::ApiController
      # GET /weapon_stat_modifiers
      def index
        @modifiers = WeaponStatModifier.all
        @modifiers = @modifiers.where(category: params[:category]) if params[:category].present?
        render json: WeaponStatModifierBlueprint.render(@modifiers, root: :weapon_stat_modifiers)
      end
      # GET /weapon_stat_modifiers/:id
      def show
        @modifier = WeaponStatModifier.find(params[:id])
        render json: WeaponStatModifierBlueprint.render(@modifier)
      end
    end
  end
 end
--- a/app/models/collection_weapon.rb
+++ b/app/models/collection_weapon.rb
@ -8,6 +8,10 @@ class CollectionWeapon < ApplicationRecord
  belongs_to :weapon_key3, class_name: 'WeaponKey', optional: true
  belongs_to :weapon_key4, class_name: 'WeaponKey', optional: true
  belongs_to :ax_modifier1, class_name: 'WeaponStatModifier', optional: true
  belongs_to :ax_modifier2, class_name: 'WeaponStatModifier', optional: true
  belongs_to :befoulment_modifier, class_name: 'WeaponStatModifier', optional: true
  has_many :grid_weapons, dependent: :nullify
  before_destroy :orphan_grid_items
@ -18,9 +22,11 @@ class CollectionWeapon < ApplicationRecord
  validates :uncap_level, inclusion: { in: 0..5 }
  validates :transcendence_step, inclusion: { in: 0..10 }
  validates :awakening_level, inclusion: { in: 1..20 }
  validates :exorcism_level, inclusion: { in: 0..5 }, allow_nil: true
  validate :validate_weapon_keys
  validate :validate_ax_skills
  validate :validate_befoulment
  validate :validate_element_change
  validate :validate_awakening_compatibility
  validate :validate_awakening_level
@ -29,7 +35,7 @@ class CollectionWeapon < ApplicationRecord
  scope :by_weapon, ->(weapon_id) { where(weapon_id: weapon_id) }
  scope :by_series, ->(series_id) { joins(:weapon).where(weapons: { weapon_series_id: series_id }) }
  scope :with_keys, -> { where.not(weapon_key1_id: nil) }
-  scope :with_ax, -> { where.not(ax_modifier1: nil) }
+  scope :with_ax, -> { where.not(ax_modifier1_id: nil) }
  scope :by_element, ->(element) { joins(:weapon).where(weapons: { element: element }) }
  scope :by_rarity, ->(rarity) { joins(:weapon).where(weapons: { rarity: rarity }) }
  scope :by_proficiency, ->(proficiency) { joins(:weapon).where(weapons: { proficiency: proficiency }) }
@ -87,16 +93,43 @@ class CollectionWeapon < ApplicationRecord
  end
  def validate_ax_skills
-    # Check for incomplete AX skills regardless of weapon.ax
+    # AX skill 1: must have both modifier and strength
    if (ax_modifier1.present? && ax_strength1.blank?) ||
       (ax_modifier1.blank? && ax_strength1.present?)
      errors.add(:base, "AX skill 1 must have both modifier and strength")
    end
    # AX skill 2: must have both modifier and strength
    if (ax_modifier2.present? && ax_strength2.blank?) ||
       (ax_modifier2.blank? && ax_strength2.present?)
      errors.add(:base, "AX skill 2 must have both modifier and strength")
    end
    # Validate category is 'ax'
    if ax_modifier1.present? && ax_modifier1.category != 'ax'
      errors.add(:ax_modifier1, "must be an AX skill modifier")
    end
    if ax_modifier2.present? && ax_modifier2.category != 'ax'
      errors.add(:ax_modifier2, "must be an AX skill modifier")
    end
  end
  def validate_befoulment
    # Befoulment: must have both modifier and strength
    if (befoulment_modifier.present? && befoulment_strength.blank?) ||
       (befoulment_modifier.blank? && befoulment_strength.present?)
      errors.add(:base, "Befoulment must have both modifier and strength")
    end
    # Validate category is 'befoulment'
    if befoulment_modifier.present? && befoulment_modifier.category != 'befoulment'
      errors.add(:befoulment_modifier, "must be a befoulment modifier")
    end
    # Exorcism level only makes sense with befoulment
    if exorcism_level.present? && exorcism_level > 0 && befoulment_modifier.blank?
      errors.add(:exorcism_level, "cannot be set without a befoulment")
    end
  end
  def validate_element_change
--- a/app/models/grid_weapon.rb
+++ b/app/models/grid_weapon.rb
@ -39,6 +39,10 @@ class GridWeapon < ApplicationRecord
  belongs_to :awakening, optional: true
  belongs_to :collection_weapon, optional: true
  belongs_to :ax_modifier1, class_name: 'WeaponStatModifier', optional: true
  belongs_to :ax_modifier2, class_name: 'WeaponStatModifier', optional: true
  belongs_to :befoulment_modifier, class_name: 'WeaponStatModifier', optional: true
  # Orphan status scopes
  scope :orphaned, -> { where(orphaned: true) }
  scope :not_orphaned, -> { where(orphaned: false) }
@ -55,10 +59,13 @@ class GridWeapon < ApplicationRecord
  ##### Amoeba configuration
  amoeba do
-    nullify :ax_modifier1
+    nullify :ax_modifier1_id
-    nullify :ax_modifier2
+    nullify :ax_modifier2_id
    nullify :ax_strength1
    nullify :ax_strength2
    nullify :befoulment_modifier_id
    nullify :befoulment_strength
    nullify :exorcism_level
  end
  ##
@ -84,10 +91,13 @@ class GridWeapon < ApplicationRecord
      weapon_key2_id: collection_weapon.weapon_key2_id,
      weapon_key3_id: collection_weapon.weapon_key3_id,
      weapon_key4_id: collection_weapon.weapon_key4_id,
-      ax_modifier1: collection_weapon.ax_modifier1,
+      ax_modifier1_id: collection_weapon.ax_modifier1_id,
      ax_strength1: collection_weapon.ax_strength1,
-      ax_modifier2: collection_weapon.ax_modifier2,
+      ax_modifier2_id: collection_weapon.ax_modifier2_id,
      ax_strength2: collection_weapon.ax_strength2,
      befoulment_modifier_id: collection_weapon.befoulment_modifier_id,
      befoulment_strength: collection_weapon.befoulment_strength,
      exorcism_level: collection_weapon.exorcism_level,
      awakening_id: collection_weapon.awakening_id,
      awakening_level: collection_weapon.awakening_level
    )
@ -116,10 +126,13 @@ class GridWeapon < ApplicationRecord
      weapon_key2_id != collection_weapon.weapon_key2_id ||
      weapon_key3_id != collection_weapon.weapon_key3_id ||
      weapon_key4_id != collection_weapon.weapon_key4_id ||
-      ax_modifier1 != collection_weapon.ax_modifier1 ||
+      ax_modifier1_id != collection_weapon.ax_modifier1_id ||
      ax_strength1 != collection_weapon.ax_strength1 ||
-      ax_modifier2 != collection_weapon.ax_modifier2 ||
+      ax_modifier2_id != collection_weapon.ax_modifier2_id ||
      ax_strength2 != collection_weapon.ax_strength2 ||
      befoulment_modifier_id != collection_weapon.befoulment_modifier_id ||
      befoulment_strength != collection_weapon.befoulment_strength ||
      exorcism_level != collection_weapon.exorcism_level ||
      awakening_id != collection_weapon.awakening_id ||
      awakening_level != collection_weapon.awakening_level
  end
--- a/app/models/weapon_series.rb
+++ b/app/models/weapon_series.rb
@ -5,6 +5,8 @@ class WeaponSeries < ApplicationRecord
  has_many :weapon_key_series, dependent: :destroy
  has_many :weapon_keys, through: :weapon_key_series
  enum :augment_type, { none: 0, ax: 1, befoulment: 2 }, default: :none
  validates :name_en, presence: true
  validates :name_jp, presence: true
  validates :slug, presence: true, uniqueness: true
@ -15,7 +17,8 @@ class WeaponSeries < ApplicationRecord
  scope :element_changeable, -> { where(element_changeable: true) }
  scope :with_weapon_keys, -> { where(has_weapon_keys: true) }
  scope :with_awakening, -> { where(has_awakening: true) }
-  scope :with_ax_skills, -> { where(has_ax_skills: true) }
+  scope :with_ax_skills, -> { where(augment_type: :ax) }
  scope :with_befoulments, -> { where(augment_type: :befoulment) }
  # Slug constants for commonly referenced series
  DARK_OPUS = 'dark-opus'
--- a/app/models/weapon_stat_modifier.rb
+++ b/app/models/weapon_stat_modifier.rb
@ -0,0 +1,31 @@
 # frozen_string_literal: true
 ##
 # Reference table for weapon stat modifiers (AX skills and befoulments).
 #
 # AX skills are positive modifiers that can be applied to certain weapons.
 # Befoulments are negative modifiers that appear on Odiant weapons.
 #
 class WeaponStatModifier < ApplicationRecord
  CATEGORIES = %w[ax befoulment].freeze
  validates :slug, presence: true, uniqueness: true
  validates :name_en, presence: true
  validates :category, presence: true, inclusion: { in: CATEGORIES }
  validates :polarity, inclusion: { in: [-1, 1] }
  scope :ax_skills, -> { where(category: 'ax') }
  scope :befoulments, -> { where(category: 'befoulment') }
  def self.find_by_game_skill_id(id)
    find_by(game_skill_id: id.to_i)
  end
  def buff?
    polarity == 1
  end
  def debuff?
    polarity == -1
  end
 end
--- a/app/services/processors/weapon_processor.rb
+++ b/app/services/processors/weapon_processor.rb
@ -41,26 +41,6 @@ module Processors
  class WeaponProcessor < BaseProcessor
    TRANSCENDENCE_LEVELS = [200, 210, 220, 230, 240, 250].freeze
    # Mapping from in‑game AX skill IDs (as strings) to our internal modifier values.
    AX_MAPPING = {
      '1588' => 2,
      '1589' => 0,
      '1590' => 1,
      '1591' => 3,
      '1592' => 4,
      '1593' => 9,
      '1594' => 13,
      '1595' => 10,
      '1596' => 5,
      '1597' => 6,
      '1599' => 8,
      '1600' => 12,
      '1601' => 11,
      '1719' => 15,
      '1720' => 16,
      '1721' => 17,
      '1722' => 14
    }.freeze
    # KEY_MAPPING maps the raw key value (as a string) to a canonical range or value.
    # For example, in our test we want a raw key "10001" to be interpreted as any key whose
@ -331,7 +311,8 @@ module Processors
    # Processes AX (augment) skill data.
    #
    # The deck stores AX skills in an array of arrays under "augment_skill_info".
-    # This method flattens the data and assigns each skill’s modifier and strength.
+    # This method flattens the data and assigns each skill's modifier and strength.
    # Modifiers are now looked up by game_skill_id in the weapon_stat_modifiers table.
    #
    # @param grid_weapon [GridWeapon] the grid weapon record being built.
    # @param ax_skill_info [Array] the raw AX skill info.
@ -340,14 +321,59 @@ module Processors
      # Flatten the nested array structure.
      ax_skills = ax_skill_info.flatten
      ax_skills.each_with_index do |ax, idx|
-        ax_id = ax['skill_id'].to_s
+        break if idx >= 2 # Only 2 AX skill slots
-        ax_mod = AX_MAPPING[ax_id] || ax_id.to_i
+
-        strength = ax['effect_value'].to_s.gsub(/[+%]/, '').to_i
+        game_skill_id = ax['skill_id'].to_i
-        grid_weapon["ax_modifier#{idx + 1}"] = ax_mod
+        modifier = find_modifier_by_game_skill_id(game_skill_id)
        unless modifier
          Rails.logger.warn(
            "[WeaponProcessor] Unknown augment skill_id=#{game_skill_id} " \
            "icon=#{ax['augment_skill_icon_image']}"
          )
          next
        end
        strength = parse_augment_strength(ax['effect_value'], ax['show_value'])
        grid_weapon["ax_modifier#{idx + 1}_id"] = modifier.id
        grid_weapon["ax_strength#{idx + 1}"] = strength
      end
    end
    ##
    # Finds a WeaponStatModifier by its game_skill_id.
    # Uses memoization to cache lookups.
    #
    # @param game_skill_id [Integer] the game's skill ID.
    # @return [WeaponStatModifier, nil]
    def find_modifier_by_game_skill_id(game_skill_id)
      @modifier_cache ||= {}
      @modifier_cache[game_skill_id] ||= WeaponStatModifier.find_by(game_skill_id: game_skill_id)
    end
    ##
    # Parses the strength value from effect_value or show_value.
    #
    # @param effect_value [String, nil] the effect_value field.
    # @param show_value [String, nil] the show_value field.
    # @return [Float, nil]
    def parse_augment_strength(effect_value, show_value)
      if effect_value.present?
        # Handle "1_3" format (seems to be "tier_value")
        if effect_value.to_s.include?('_')
          return effect_value.to_s.split('_').last.to_f
        end
        return effect_value.to_f if effect_value.to_s.match?(/\A[\d.]+\z/)
      end
      # Try show_value (e.g., "3%")
      if show_value.present?
        return show_value.to_s.gsub('%', '').to_f
      end
      nil
    end
    ##
    # Maps the in‑game awakening data (stored under "arousal") to our Awakening record.
    #
--- a/app/services/weapon_import_service.rb
+++ b/app/services/weapon_import_service.rb
@ -35,6 +35,7 @@ class WeaponImportService
    @skipped = []
    @errors = []
    @awakening_cache = {}
    @modifier_cache = {}
    @processed_game_ids = []
  end
@ -192,9 +193,18 @@ class WeaponImportService
    awakening_attrs = parse_awakening(param['arousal'])
    attrs.merge!(awakening_attrs) if awakening_attrs
-    # Parse AX skills if present
+    # Check if this is an Odiant (befoulment) weapon
-    ax_attrs = parse_ax_skills(param['augment_skill_info'])
+    odiant = param['odiant']
-    attrs.merge!(ax_attrs) if ax_attrs
+    if odiant && odiant['is_odiant_weapon'] == true
      # Parse befoulment from augment_skill_info
      befoulment_attrs = parse_befoulment(param['augment_skill_info'])
      attrs.merge!(befoulment_attrs) if befoulment_attrs
      attrs[:exorcism_level] = odiant['exorcision_level'].to_i.clamp(0, 5)
    else
      # Regular weapon - parse AX skills
      ax_attrs = parse_ax_skills(param['augment_skill_info'])
      attrs.merge!(ax_attrs) if ax_attrs
    end
    attrs
  end
@ -253,18 +263,18 @@ class WeaponImportService
    # First AX skill
    if skills[0].is_a?(Hash)
-      ax1 = parse_single_ax_skill(skills[0])
+      ax1 = parse_single_augment_skill(skills[0])
      if ax1
-        attrs[:ax_modifier1] = ax1[:modifier]
+        attrs[:ax_modifier1_id] = ax1[:modifier_id]
        attrs[:ax_strength1] = ax1[:strength]
      end
    end
    # Second AX skill
    if skills[1].is_a?(Hash)
-      ax2 = parse_single_ax_skill(skills[1])
+      ax2 = parse_single_augment_skill(skills[1])
      if ax2
-        attrs[:ax_modifier2] = ax2[:modifier]
+        attrs[:ax_modifier2_id] = ax2[:modifier_id]
        attrs[:ax_strength2] = ax2[:strength]
      end
    end
@ -273,26 +283,60 @@ class WeaponImportService
  end
  ##
-  # Parses a single AX skill from game data.
+  # Parses befoulment data from game format.
  # Odiant weapons have a single befoulment in augment_skill_info.
  #
-  # @param skill [Hash] Single AX skill data with skill_id and effect_value
+  # @param augment_skill_info [Array] The game's augment skill data
-  # @return [Hash, nil] { modifier:, strength: } or nil
+  # @return [Hash, nil] Befoulment attributes or nil if no befoulment
-  def parse_single_ax_skill(skill)
+  def parse_befoulment(augment_skill_info)
-    return nil unless skill['skill_id'].present?
+    return nil if augment_skill_info.blank? || !augment_skill_info.is_a?(Array)
-    # The skill_id maps to our AX modifier
+    skills = augment_skill_info.first
-    modifier = skill['skill_id'].to_i
+    return nil if skills.blank? || !skills.is_a?(Array)
-    # Parse strength from effect_value (may be "3" or "1_3" format)
+    skill = skills.first
-    # or from show_value (may be "3%" format)
+    return nil unless skill.is_a?(Hash)
    strength = parse_ax_strength(skill['effect_value'], skill['show_value'])
-    return nil unless strength
+    result = parse_single_augment_skill(skill)
    return nil unless result
-    { modifier: modifier, strength: strength }
+    {
      befoulment_modifier_id: result[:modifier_id],
      befoulment_strength: result[:strength]
    }
  end
-  def parse_ax_strength(effect_value, show_value)
+  ##
  # Parses a single augment skill (AX or befoulment) from game data.
  #
  # @param skill [Hash] Single skill data with skill_id and effect_value
  # @return [Hash, nil] { modifier_id:, strength: } or nil
  def parse_single_augment_skill(skill)
    return nil unless skill['skill_id'].present?
    game_skill_id = skill['skill_id'].to_i
    modifier = find_modifier_by_game_skill_id(game_skill_id)
    unless modifier
      # Log unknown skill ID with icon for discovery
      Rails.logger.warn(
        "[WeaponImportService] Unknown augment skill_id=#{game_skill_id} " \
        "icon=#{skill['augment_skill_icon_image']}"
      )
      return nil
    end
    strength = parse_augment_strength(skill['effect_value'], skill['show_value'])
    return nil unless strength
    { modifier_id: modifier.id, strength: strength }
  end
  def find_modifier_by_game_skill_id(game_skill_id)
    @modifier_cache[game_skill_id] ||= WeaponStatModifier.find_by(game_skill_id: game_skill_id)
  end
  def parse_augment_strength(effect_value, show_value)
    # Try effect_value first
    if effect_value.present?
      # Handle "1_3" format (seems to be "tier_value")
--- a/config/routes.rb
+++ b/config/routes.rb
@ -128,6 +128,7 @@ Rails.application.routes.draw do
        get 'for_slot/:slot', action: :for_slot, as: :for_slot
      end
    end
    resources :weapon_stat_modifiers, only: %i[index show]
    # Grid artifacts
    resources :grid_artifacts, only: %i[create update destroy] do
--- a/db/data/20251230000001_seed_weapon_stat_modifiers.rb
+++ b/db/data/20251230000001_seed_weapon_stat_modifiers.rb
@ -0,0 +1,55 @@
 # frozen_string_literal: true
 class SeedWeaponStatModifiers < ActiveRecord::Migration[8.0]
  def up
    ax_skills = [
      # Primary AX Skills
      { slug: 'ax_hp', name_en: 'HP', name_jp: 'HP', category: 'ax', stat: 'hp', polarity: 1, suffix: '%', base_min: 1, base_max: 11, game_skill_id: 1588 },
      { slug: 'ax_atk', name_en: 'ATK', name_jp: '攻撃', category: 'ax', stat: 'atk', polarity: 1, suffix: '%', base_min: 1, base_max: 3.5, game_skill_id: 1589 },
      { slug: 'ax_def', name_en: 'DEF', name_jp: '防御', category: 'ax', stat: 'def', polarity: 1, suffix: '%', base_min: 1, base_max: 8, game_skill_id: 1590 },
      { slug: 'ax_ca_dmg', name_en: 'C.A. DMG', name_jp: '奥義ダメ', category: 'ax', stat: 'ca_dmg', polarity: 1, suffix: '%', base_min: 2, base_max: 8.5, game_skill_id: 1591 },
      { slug: 'ax_multiattack', name_en: 'Multiattack Rate', name_jp: '連撃率', category: 'ax', stat: 'multiattack', polarity: 1, suffix: '%', base_min: 1, base_max: 4, game_skill_id: 1592 },
      # Secondary AX Skills
      { slug: 'ax_debuff_res', name_en: 'Debuff Resistance', name_jp: '弱体耐性', category: 'ax', stat: 'debuff_res', polarity: 1, suffix: '%', base_min: 1, base_max: 3, game_skill_id: 1593 },
      { slug: 'ax_ele_atk', name_en: 'Elemental ATK', name_jp: '全属性攻撃力', category: 'ax', stat: 'ele_atk', polarity: 1, suffix: '%', base_min: 1, base_max: 5, game_skill_id: 1594 },
      { slug: 'ax_healing', name_en: 'Healing', name_jp: '回復性能', category: 'ax', stat: 'healing', polarity: 1, suffix: '%', base_min: 2, base_max: 5, game_skill_id: 1595 },
      { slug: 'ax_da', name_en: 'Double Attack Rate', name_jp: 'DA確率', category: 'ax', stat: 'da', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1596 },
      { slug: 'ax_ta', name_en: 'Triple Attack Rate', name_jp: 'TA確率', category: 'ax', stat: 'ta', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1597 },
      { slug: 'ax_ca_cap', name_en: 'C.A. DMG Cap', name_jp: '奥義上限', category: 'ax', stat: 'ca_cap', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1599 },
      { slug: 'ax_stamina', name_en: 'Stamina', name_jp: '渾身', category: 'ax', stat: 'stamina', polarity: 1, suffix: nil, base_min: 1, base_max: 3, game_skill_id: 1600 },
      { slug: 'ax_enmity', name_en: 'Enmity', name_jp: '背水', category: 'ax', stat: 'enmity', polarity: 1, suffix: nil, base_min: 1, base_max: 3, game_skill_id: 1601 },
      # Extended AX Skills (axType 2)
      { slug: 'ax_skill_supp', name_en: 'Supplemental Skill DMG', name_jp: 'アビ与ダメ上昇', category: 'ax', stat: 'skill_supp', polarity: 1, suffix: nil, base_min: 1, base_max: 5, game_skill_id: 1719 },
      { slug: 'ax_ca_supp', name_en: 'Supplemental C.A. DMG', name_jp: '奥義与ダメ上昇', category: 'ax', stat: 'ca_supp', polarity: 1, suffix: nil, base_min: 1, base_max: 5, game_skill_id: 1720 },
      { slug: 'ax_ele_dmg_red', name_en: 'Elemental DMG Reduction', name_jp: '属性ダメ軽減', category: 'ax', stat: 'ele_dmg_red', polarity: 1, suffix: '%', base_min: 1, base_max: 5, game_skill_id: 1721 },
      { slug: 'ax_na_cap', name_en: 'Normal ATK DMG Cap', name_jp: '通常ダメ上限', category: 'ax', stat: 'na_cap', polarity: 1, suffix: '%', base_min: 0.5, base_max: 1.5, game_skill_id: 1722 },
      # Utility AX Skills (axType 3)
      { slug: 'ax_exp', name_en: 'EXP Gain', name_jp: 'EXP UP', category: 'ax', stat: 'exp', polarity: 1, suffix: '%', base_min: 5, base_max: 10, game_skill_id: 1837 },
      { slug: 'ax_rupie', name_en: 'Rupie Gain', name_jp: '獲得ルピ', category: 'ax', stat: 'rupie', polarity: 1, suffix: '%', base_min: 10, base_max: 20, game_skill_id: 1838 }
    ]
    befoulments = [
      # Befoulments - game_skill_ids from game data (2873-2881, 2876 doesn't exist)
      { slug: 'befoul_atk_down', name_en: 'ATK Down', name_jp: '攻撃力DOWN', category: 'befoulment', stat: 'atk', polarity: -1, suffix: '%', base_min: -12, base_max: -6, game_skill_id: 2873 },
      { slug: 'befoul_ability_dmg_down', name_en: 'Ability DMG Down', name_jp: 'アビリティダメージDOWN', category: 'befoulment', stat: 'ability_dmg', polarity: -1, suffix: '%', base_min: -50, base_max: -50, game_skill_id: 2874 },
      { slug: 'befoul_ca_dmg_down', name_en: 'CA DMG Down', name_jp: '奥義ダメージDOWN', category: 'befoulment', stat: 'ca_dmg', polarity: -1, suffix: '%', base_min: -38, base_max: -26, game_skill_id: 2875 },
      { slug: 'befoul_da_ta_down', name_en: 'DA/TA Down', name_jp: '連撃率DOWN', category: 'befoulment', stat: 'da_ta', polarity: -1, suffix: '%', base_min: -22, base_max: -19, game_skill_id: 2877 },
      { slug: 'befoul_debuff_down', name_en: 'Debuff Success Down', name_jp: '弱体成功率DOWN', category: 'befoulment', stat: 'debuff_success', polarity: -1, suffix: '%', base_min: -16, base_max: -6, game_skill_id: 2878 },
      { slug: 'befoul_hp_down', name_en: 'Max HP Down', name_jp: '最大HP減少', category: 'befoulment', stat: 'hp', polarity: -1, suffix: '%', base_min: -50, base_max: -26, game_skill_id: 2879 },
      { slug: 'befoul_def_down', name_en: 'DEF Down', name_jp: '防御力DOWN', category: 'befoulment', stat: 'def', polarity: -1, suffix: '%', base_min: -25, base_max: -21, game_skill_id: 2880 },
      { slug: 'befoul_dot', name_en: 'Damage Over Time', name_jp: '毎ターンダメージ', category: 'befoulment', stat: 'dot', polarity: -1, suffix: '%', base_min: 6, base_max: 16, game_skill_id: 2881 }
    ]
    now = Time.current
    (ax_skills + befoulments).each do |attrs|
      WeaponStatModifier.create!(attrs.merge(created_at: now, updated_at: now))
    end
  end
  def down
    WeaponStatModifier.delete_all
  end
 end
--- a/db/data/20251230000002_migrate_ax_modifiers_to_fk.rb
+++ b/db/data/20251230000002_migrate_ax_modifiers_to_fk.rb
@ -0,0 +1,115 @@
 # frozen_string_literal: true
 class MigrateAxModifiersToFk < ActiveRecord::Migration[8.0]
  # Old AX_MAPPING from WeaponProcessor stored internal integer values (0, 1, 2...)
  # We need to map: old internal_value => game_skill_id => weapon_stat_modifier.id
  OLD_INTERNAL_TO_GAME_SKILL_ID = {
    2 => 1588,   # HP
    0 => 1589,   # ATK
    1 => 1590,   # DEF
    3 => 1591,   # C.A. DMG
    4 => 1592,   # Multiattack Rate
    9 => 1593,   # Debuff Resistance
    13 => 1594,  # Elemental ATK
    10 => 1595,  # Healing
    5 => 1596,   # Double Attack Rate
    6 => 1597,   # Triple Attack Rate
    8 => 1599,   # C.A. DMG Cap
    12 => 1600,  # Stamina
    11 => 1601,  # Enmity
    15 => 1719,  # Supplemental Skill DMG
    16 => 1720,  # Supplemental C.A. DMG
    17 => 1721,  # Elemental DMG Reduction
    14 => 1722   # Normal ATK DMG Cap
  }.freeze
  def up
    # Build lookup: old_internal_value -> new FK id
    modifier_by_game_skill_id = WeaponStatModifier.pluck(:game_skill_id, :id).to_h
    old_to_new_id = OLD_INTERNAL_TO_GAME_SKILL_ID.transform_values do |game_skill_id|
      modifier_by_game_skill_id[game_skill_id]
    end
    # Use raw SQL to query old integer columns (ax_modifier1, ax_modifier2)
    # and update the new FK columns (ax_modifier1_id, ax_modifier2_id)
    # Migrate CollectionWeapon
    execute <<-SQL.squish
      UPDATE collection_weapons
      SET ax_modifier1_id = CASE ax_modifier1
        #{old_to_new_id.map { |old_val, new_id| "WHEN #{old_val} THEN #{new_id}" }.join(' ')}
      END
      WHERE ax_modifier1 IS NOT NULL
    SQL
    execute <<-SQL.squish
      UPDATE collection_weapons
      SET ax_modifier2_id = CASE ax_modifier2
        #{old_to_new_id.map { |old_val, new_id| "WHEN #{old_val} THEN #{new_id}" }.join(' ')}
      END
      WHERE ax_modifier2 IS NOT NULL
    SQL
    # Migrate GridWeapon
    execute <<-SQL.squish
      UPDATE grid_weapons
      SET ax_modifier1_id = CASE ax_modifier1
        #{old_to_new_id.map { |old_val, new_id| "WHEN #{old_val} THEN #{new_id}" }.join(' ')}
      END
      WHERE ax_modifier1 IS NOT NULL
    SQL
    execute <<-SQL.squish
      UPDATE grid_weapons
      SET ax_modifier2_id = CASE ax_modifier2
        #{old_to_new_id.map { |old_val, new_id| "WHEN #{old_val} THEN #{new_id}" }.join(' ')}
      END
      WHERE ax_modifier2 IS NOT NULL
    SQL
  end
  def down
    # Build reverse lookup: new FK id -> old internal value
    modifier_by_game_skill_id = WeaponStatModifier.pluck(:game_skill_id, :id).to_h
    game_skill_id_to_internal = OLD_INTERNAL_TO_GAME_SKILL_ID.invert
    new_id_to_old = modifier_by_game_skill_id.each_with_object({}) do |(game_skill_id, new_id), hash|
      old_val = game_skill_id_to_internal[game_skill_id]
      hash[new_id] = old_val if old_val
    end
    return if new_id_to_old.empty?
    # Reverse: copy FK back to old integer columns
    execute <<-SQL.squish
      UPDATE collection_weapons
      SET ax_modifier1 = CASE ax_modifier1_id
        #{new_id_to_old.map { |new_id, old_val| "WHEN #{new_id} THEN #{old_val}" }.join(' ')}
      END
      WHERE ax_modifier1_id IS NOT NULL
    SQL
    execute <<-SQL.squish
      UPDATE collection_weapons
      SET ax_modifier2 = CASE ax_modifier2_id
        #{new_id_to_old.map { |new_id, old_val| "WHEN #{new_id} THEN #{old_val}" }.join(' ')}
      END
      WHERE ax_modifier2_id IS NOT NULL
    SQL
    execute <<-SQL.squish
      UPDATE grid_weapons
      SET ax_modifier1 = CASE ax_modifier1_id
        #{new_id_to_old.map { |new_id, old_val| "WHEN #{new_id} THEN #{old_val}" }.join(' ')}
      END
      WHERE ax_modifier1_id IS NOT NULL
    SQL
    execute <<-SQL.squish
      UPDATE grid_weapons
      SET ax_modifier2 = CASE ax_modifier2_id
        #{new_id_to_old.map { |new_id, old_val| "WHEN #{new_id} THEN #{old_val}" }.join(' ')}
      END
      WHERE ax_modifier2_id IS NOT NULL
    SQL
  end
 end
--- a/db/data/20251230000003_add_befoulment_game_skill_ids.rb
+++ b/db/data/20251230000003_add_befoulment_game_skill_ids.rb
@ -0,0 +1,38 @@
 # frozen_string_literal: true
 class AddBefoulmentGameSkillIds < ActiveRecord::Migration[8.0]
  # Befoulment game_skill_id mapping from game data:
  # 2873: ex_skill_atk_down      | ATK Lowered
  # 2874: ex_skill_ab_atk_down   | Skill DMG Lowered
  # 2875: ex_skill_sp_atk_down   | C.A. DMG Lowered
  # 2876: (doesn't exist)
  # 2877: ex_skill_ta_down       | Multiattack Rate Lowered
  # 2878: ex_skill_ailment_enhance_down | Debuff Success Rate Lowered
  # 2879: ex_skill_hp_down       | HP Cut
  # 2880: ex_skill_def_down      | Def Lowered (already mapped)
  # 2881: ex_skill_turn_damage   | Turn DMG
  BEFOULMENT_GAME_SKILL_IDS = {
    'befoul_atk_down' => 2873,
    'befoul_ability_dmg_down' => 2874,
    'befoul_ca_dmg_down' => 2875,
    'befoul_da_ta_down' => 2877,
    'befoul_debuff_down' => 2878,
    'befoul_hp_down' => 2879,
    'befoul_def_down' => 2880,  # Already set, but include for completeness
    'befoul_dot' => 2881
  }.freeze
  def up
    BEFOULMENT_GAME_SKILL_IDS.each do |slug, game_skill_id|
      WeaponStatModifier.where(slug: slug).update_all(game_skill_id: game_skill_id)
    end
  end
  def down
    # Clear game_skill_ids for befoulments (except def_down which was already set)
    BEFOULMENT_GAME_SKILL_IDS.except('befoul_def_down').each_key do |slug|
      WeaponStatModifier.where(slug: slug).update_all(game_skill_id: nil)
    end
  end
 end
--- a/db/data_schema.rb
+++ b/db/data_schema.rb
@ -1 +1 @@
-DataMigrate::Data.define(version: 20251214193836)
+DataMigrate::Data.define(version: 20251230000002)
--- a/db/migrate/20251230000001_create_weapon_stat_modifiers.rb
+++ b/db/migrate/20251230000001_create_weapon_stat_modifiers.rb
@ -0,0 +1,24 @@
 # frozen_string_literal: true
 class CreateWeaponStatModifiers < ActiveRecord::Migration[8.0]
  def change
    create_table :weapon_stat_modifiers do |t|
      t.string :slug, null: false
      t.string :name_en, null: false
      t.string :name_jp
      t.string :category, null: false
      t.string :stat
      t.integer :polarity, default: 1, null: false
      t.string :suffix
      t.float :base_min
      t.float :base_max
      t.integer :game_skill_id
      t.timestamps
    end
    add_index :weapon_stat_modifiers, :slug, unique: true
    add_index :weapon_stat_modifiers, :game_skill_id, unique: true
    add_index :weapon_stat_modifiers, :category
  end
 end
--- a/db/migrate/20251230000002_add_weapon_stat_modifier_fks.rb
+++ b/db/migrate/20251230000002_add_weapon_stat_modifier_fks.rb
@ -0,0 +1,36 @@
 # frozen_string_literal: true
 class AddWeaponStatModifierFks < ActiveRecord::Migration[8.0]
  def change
    # collection_weapons - add FK columns
    # Note: old ax_modifier1/ax_modifier2 integer columns still exist for data migration
    add_column :collection_weapons, :ax_modifier1_id, :bigint
    add_column :collection_weapons, :ax_modifier2_id, :bigint
    add_column :collection_weapons, :befoulment_modifier_id, :bigint
    add_column :collection_weapons, :befoulment_strength, :float
    add_column :collection_weapons, :exorcism_level, :integer, default: 0
    add_index :collection_weapons, :ax_modifier1_id
    add_index :collection_weapons, :ax_modifier2_id
    add_index :collection_weapons, :befoulment_modifier_id
    add_foreign_key :collection_weapons, :weapon_stat_modifiers, column: :ax_modifier1_id
    add_foreign_key :collection_weapons, :weapon_stat_modifiers, column: :ax_modifier2_id
    add_foreign_key :collection_weapons, :weapon_stat_modifiers, column: :befoulment_modifier_id
    # grid_weapons - same pattern
    add_column :grid_weapons, :ax_modifier1_id, :bigint
    add_column :grid_weapons, :ax_modifier2_id, :bigint
    add_column :grid_weapons, :befoulment_modifier_id, :bigint
    add_column :grid_weapons, :befoulment_strength, :float
    add_column :grid_weapons, :exorcism_level, :integer, default: 0
    add_index :grid_weapons, :ax_modifier1_id
    add_index :grid_weapons, :ax_modifier2_id
    add_index :grid_weapons, :befoulment_modifier_id
    add_foreign_key :grid_weapons, :weapon_stat_modifiers, column: :ax_modifier1_id
    add_foreign_key :grid_weapons, :weapon_stat_modifiers, column: :ax_modifier2_id
    add_foreign_key :grid_weapons, :weapon_stat_modifiers, column: :befoulment_modifier_id
  end
 end
--- a/db/migrate/20251230000003_finalize_ax_modifier_columns.rb
+++ b/db/migrate/20251230000003_finalize_ax_modifier_columns.rb
@ -0,0 +1,11 @@
 # frozen_string_literal: true
 class FinalizeAxModifierColumns < ActiveRecord::Migration[8.0]
  def change
    # Remove old integer columns (data has been migrated to ax_modifier1_id/ax_modifier2_id FKs)
    remove_column :collection_weapons, :ax_modifier1, :integer
    remove_column :collection_weapons, :ax_modifier2, :integer
    remove_column :grid_weapons, :ax_modifier1, :integer
    remove_column :grid_weapons, :ax_modifier2, :integer
  end
 end
--- a/db/migrate/20251230000004_add_augment_type_to_weapon_series.rb
+++ b/db/migrate/20251230000004_add_augment_type_to_weapon_series.rb
@ -0,0 +1,29 @@
 # frozen_string_literal: true
 class AddAugmentTypeToWeaponSeries < ActiveRecord::Migration[8.0]
  def up
    add_column :weapon_series, :augment_type, :integer, default: 0, null: false
    # Migrate existing has_ax_skills: true to augment_type: 1 (ax)
    execute <<-SQL.squish
      UPDATE weapon_series
      SET augment_type = 1
      WHERE has_ax_skills = true
    SQL
    remove_column :weapon_series, :has_ax_skills
  end
  def down
    add_column :weapon_series, :has_ax_skills, :boolean, default: false, null: false
    # Migrate augment_type: 1 (ax) back to has_ax_skills: true
    execute <<-SQL.squish
      UPDATE weapon_series
      SET has_ax_skills = true
      WHERE augment_type = 1
    SQL
    remove_column :weapon_series, :augment_type
  end
 end
--- a/db/schema.rb
+++ b/db/schema.rb
@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
-ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
+ActiveRecord::Schema[8.0].define(version: 2025_12_30_000004) do
  # These are extensions that must be enabled in order to support this database
  enable_extension "btree_gin"
  enable_extension "pg_catalog.plpgsql"
@ -235,15 +235,21 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.uuid "weapon_key4_id"
    t.uuid "awakening_id"
    t.integer "awakening_level", default: 1, null: false
    t.integer "ax_modifier1"
    t.float "ax_strength1"
    t.integer "ax_modifier2"
    t.float "ax_strength2"
    t.integer "element"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "game_id"
    t.bigint "ax_modifier1_id"
    t.bigint "ax_modifier2_id"
    t.bigint "befoulment_modifier_id"
    t.float "befoulment_strength"
    t.integer "exorcism_level", default: 0
    t.index ["awakening_id"], name: "index_collection_weapons_on_awakening_id"
    t.index ["ax_modifier1_id"], name: "index_collection_weapons_on_ax_modifier1_id"
    t.index ["ax_modifier2_id"], name: "index_collection_weapons_on_ax_modifier2_id"
    t.index ["befoulment_modifier_id"], name: "index_collection_weapons_on_befoulment_modifier_id"
    t.index ["user_id", "game_id"], name: "index_collection_weapons_on_user_id_and_game_id", unique: true, where: "(game_id IS NOT NULL)"
    t.index ["user_id", "weapon_id"], name: "index_collection_weapons_on_user_id_and_weapon_id"
    t.index ["user_id"], name: "index_collection_weapons_on_user_id"
@ -381,9 +387,11 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.datetime "updated_at", null: false
    t.integer "reroll_slot"
    t.uuid "collection_artifact_id"
    t.boolean "orphaned", default: false, null: false
    t.index ["artifact_id"], name: "index_grid_artifacts_on_artifact_id"
    t.index ["collection_artifact_id"], name: "index_grid_artifacts_on_collection_artifact_id"
    t.index ["grid_character_id"], name: "index_grid_artifacts_on_grid_character_id", unique: true
    t.index ["orphaned"], name: "index_grid_artifacts_on_orphaned"
  end
  create_table "grid_characters", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
@ -422,7 +430,9 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.integer "transcendence_step", default: 0, null: false
    t.boolean "quick_summon", default: false
    t.uuid "collection_summon_id"
    t.boolean "orphaned", default: false, null: false
    t.index ["collection_summon_id"], name: "index_grid_summons_on_collection_summon_id"
    t.index ["orphaned"], name: "index_grid_summons_on_orphaned"
    t.index ["party_id", "position"], name: "index_grid_summons_on_party_id_and_position"
    t.index ["party_id"], name: "index_grid_summons_on_party_id"
    t.index ["summon_id"], name: "index_grid_summons_on_summon_id"
@ -439,9 +449,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.uuid "weapon_key3_id"
    t.integer "ax_modifier1"
    t.float "ax_strength1"
    t.integer "ax_modifier2"
    t.float "ax_strength2"
    t.integer "element"
    t.integer "awakening_level", default: 1, null: false
@ -449,8 +457,18 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.integer "transcendence_step", default: 0
    t.string "weapon_key4_id"
    t.uuid "collection_weapon_id"
    t.boolean "orphaned", default: false, null: false
    t.bigint "ax_modifier1_id"
    t.bigint "ax_modifier2_id"
    t.bigint "befoulment_modifier_id"
    t.float "befoulment_strength"
    t.integer "exorcism_level", default: 0
    t.index ["awakening_id"], name: "index_grid_weapons_on_awakening_id"
    t.index ["ax_modifier1_id"], name: "index_grid_weapons_on_ax_modifier1_id"
    t.index ["ax_modifier2_id"], name: "index_grid_weapons_on_ax_modifier2_id"
    t.index ["befoulment_modifier_id"], name: "index_grid_weapons_on_befoulment_modifier_id"
    t.index ["collection_weapon_id"], name: "index_grid_weapons_on_collection_weapon_id"
    t.index ["orphaned"], name: "index_grid_weapons_on_orphaned"
    t.index ["party_id", "position"], name: "index_grid_weapons_on_party_id_and_position"
    t.index ["party_id"], name: "index_grid_weapons_on_party_id"
    t.index ["weapon_id"], name: "index_grid_weapons_on_weapon_id"
@ -924,7 +942,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.boolean "element_changeable", default: false, null: false
    t.boolean "has_weapon_keys", default: false, null: false
    t.boolean "has_awakening", default: false, null: false
-    t.boolean "has_ax_skills", default: false, null: false
+    t.integer "augment_type", default: 0, null: false
    t.index ["order"], name: "index_weapon_series_on_order"
    t.index ["slug"], name: "index_weapon_series_on_slug", unique: true
  end
@ -945,6 +963,24 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
    t.index ["weapon_granblue_id"], name: "index_weapon_skills_on_weapon_granblue_id"
  end
  create_table "weapon_stat_modifiers", force: :cascade do |t|
    t.string "slug", null: false
    t.string "name_en", null: false
    t.string "name_jp"
    t.string "category", null: false
    t.string "stat"
    t.integer "polarity", default: 1, null: false
    t.string "suffix"
    t.float "base_min"
    t.float "base_max"
    t.integer "game_skill_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["category"], name: "index_weapon_stat_modifiers_on_category"
    t.index ["game_skill_id"], name: "index_weapon_stat_modifiers_on_game_skill_id", unique: true
    t.index ["slug"], name: "index_weapon_stat_modifiers_on_slug", unique: true
  end
  create_table "weapons", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
    t.string "name_en"
    t.string "name_jp"
@ -1024,6 +1060,9 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
  add_foreign_key "collection_weapons", "weapon_keys", column: "weapon_key2_id"
  add_foreign_key "collection_weapons", "weapon_keys", column: "weapon_key3_id"
  add_foreign_key "collection_weapons", "weapon_keys", column: "weapon_key4_id"
  add_foreign_key "collection_weapons", "weapon_stat_modifiers", column: "ax_modifier1_id"
  add_foreign_key "collection_weapons", "weapon_stat_modifiers", column: "ax_modifier2_id"
  add_foreign_key "collection_weapons", "weapon_stat_modifiers", column: "befoulment_modifier_id"
  add_foreign_key "collection_weapons", "weapons"
  add_foreign_key "crew_gw_participations", "crews"
  add_foreign_key "crew_gw_participations", "gw_events"
@ -1049,6 +1088,9 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_21_210000) do
  add_foreign_key "grid_weapons", "collection_weapons"
  add_foreign_key "grid_weapons", "parties"
  add_foreign_key "grid_weapons", "weapon_keys", column: "weapon_key3_id"
  add_foreign_key "grid_weapons", "weapon_stat_modifiers", column: "ax_modifier1_id"
  add_foreign_key "grid_weapons", "weapon_stat_modifiers", column: "ax_modifier2_id"
  add_foreign_key "grid_weapons", "weapon_stat_modifiers", column: "befoulment_modifier_id"
  add_foreign_key "grid_weapons", "weapons"
  add_foreign_key "gw_crew_scores", "crew_gw_participations"
  add_foreign_key "gw_individual_scores", "crew_gw_participations"
--- a/db/seed/test/weapon_series_test.csv
+++ b/db/seed/test/weapon_series_test.csv
@ -1,12 +1,12 @@
-id,slug,name_en,name_jp,order,extra,element_changeable,has_weapon_keys,has_awakening,has_ax_skills
+id,slug,name_en,name_jp,order,extra,element_changeable,has_weapon_keys,has_awakening,augment_type
-00000000-0001-0000-0000-000000000001,gacha,Gacha Weapons,ガチャ武器,0,false,false,false,false,false
+00000000-0001-0000-0000-000000000001,gacha,Gacha Weapons,ガチャ武器,0,false,false,false,false,none
-00000000-0001-0000-0000-000000000002,grand,Grand Weapons,リミテッドシリーズ,2,false,false,true,false,false
+00000000-0001-0000-0000-000000000002,grand,Grand Weapons,リミテッドシリーズ,2,false,false,true,false,none
-00000000-0001-0000-0000-000000000003,dark-opus,Dark Opus Weapons,終末の神器,3,false,false,true,true,false
+00000000-0001-0000-0000-000000000003,dark-opus,Dark Opus Weapons,終末の神器,3,false,false,true,true,none
-00000000-0001-0000-0000-000000000004,revenant,Revenant Weapons,天星器,21,false,true,false,false,false
+00000000-0001-0000-0000-000000000004,revenant,Revenant Weapons,天星器,21,false,true,false,false,none
-00000000-0001-0000-0000-000000000005,xeno,Xeno Weapons,六道武器,23,true,false,false,false,false
+00000000-0001-0000-0000-000000000005,xeno,Xeno Weapons,六道武器,23,true,false,false,false,none
-00000000-0001-0000-0000-000000000006,ultima,Ultima Weapons,オメガウェポン,9,false,true,true,false,false
+00000000-0001-0000-0000-000000000006,ultima,Ultima Weapons,オメガウェポン,9,false,true,true,false,none
-00000000-0001-0000-0000-000000000007,superlative,Superlative Weapons,スペリオシリーズ,27,true,true,true,false,false
+00000000-0001-0000-0000-000000000007,superlative,Superlative Weapons,スペリオシリーズ,27,true,true,true,false,none
-00000000-0001-0000-0000-000000000008,draconic,Draconic Weapons,ドラコニックウェポン・オリジン,5,false,false,true,true,false
+00000000-0001-0000-0000-000000000008,draconic,Draconic Weapons,ドラコニックウェポン・オリジン,5,false,false,true,true,none
-00000000-0001-0000-0000-000000000009,draconic-providence,Draconic Weapons Providence,ドラコニックウェポン,6,false,false,true,true,false
+00000000-0001-0000-0000-000000000009,draconic-providence,Draconic Weapons Providence,ドラコニックウェポン,6,false,false,true,true,none
-00000000-0001-0000-0000-000000000010,primal,Primal Weapons,プライマルシリーズ,32,false,false,false,false,false
+00000000-0001-0000-0000-000000000010,primal,Primal Weapons,プライマルシリーズ,32,false,false,false,false,none
-00000000-0001-0000-0000-000000000011,event,Event Weapons,イベント武器,99,false,false,false,false,false
+00000000-0001-0000-0000-000000000011,event,Event Weapons,イベント武器,99,false,false,false,false,none
--- a/db/seeds/weapon_stat_modifiers.rb
+++ b/db/seeds/weapon_stat_modifiers.rb
@ -0,0 +1,56 @@
 # frozen_string_literal: true
 ##
 # Seeds for WeaponStatModifier - AX skills and befoulments
 #
 puts 'Seeding weapon stat modifiers...'
 ax_skills = [
  # Primary AX Skills
  { slug: 'ax_hp', name_en: 'HP', name_jp: 'HP', category: 'ax', stat: 'hp', polarity: 1, suffix: '%', base_min: 1, base_max: 11, game_skill_id: 1588 },
  { slug: 'ax_atk', name_en: 'ATK', name_jp: '攻撃', category: 'ax', stat: 'atk', polarity: 1, suffix: '%', base_min: 1, base_max: 3.5, game_skill_id: 1589 },
  { slug: 'ax_def', name_en: 'DEF', name_jp: '防御', category: 'ax', stat: 'def', polarity: 1, suffix: '%', base_min: 1, base_max: 8, game_skill_id: 1590 },
  { slug: 'ax_ca_dmg', name_en: 'C.A. DMG', name_jp: '奥義ダメ', category: 'ax', stat: 'ca_dmg', polarity: 1, suffix: '%', base_min: 2, base_max: 8.5, game_skill_id: 1591 },
  { slug: 'ax_multiattack', name_en: 'Multiattack Rate', name_jp: '連撃率', category: 'ax', stat: 'multiattack', polarity: 1, suffix: '%', base_min: 1, base_max: 4, game_skill_id: 1592 },
  # Secondary AX Skills
  { slug: 'ax_debuff_res', name_en: 'Debuff Resistance', name_jp: '弱体耐性', category: 'ax', stat: 'debuff_res', polarity: 1, suffix: '%', base_min: 1, base_max: 3, game_skill_id: 1593 },
  { slug: 'ax_ele_atk', name_en: 'Elemental ATK', name_jp: '全属性攻撃力', category: 'ax', stat: 'ele_atk', polarity: 1, suffix: '%', base_min: 1, base_max: 5, game_skill_id: 1594 },
  { slug: 'ax_healing', name_en: 'Healing', name_jp: '回復性能', category: 'ax', stat: 'healing', polarity: 1, suffix: '%', base_min: 2, base_max: 5, game_skill_id: 1595 },
  { slug: 'ax_da', name_en: 'Double Attack Rate', name_jp: 'DA確率', category: 'ax', stat: 'da', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1596 },
  { slug: 'ax_ta', name_en: 'Triple Attack Rate', name_jp: 'TA確率', category: 'ax', stat: 'ta', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1597 },
  { slug: 'ax_ca_cap', name_en: 'C.A. DMG Cap', name_jp: '奥義上限', category: 'ax', stat: 'ca_cap', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1599 },
  { slug: 'ax_stamina', name_en: 'Stamina', name_jp: '渾身', category: 'ax', stat: 'stamina', polarity: 1, suffix: nil, base_min: 1, base_max: 3, game_skill_id: 1600 },
  { slug: 'ax_enmity', name_en: 'Enmity', name_jp: '背水', category: 'ax', stat: 'enmity', polarity: 1, suffix: nil, base_min: 1, base_max: 3, game_skill_id: 1601 },
  # Extended AX Skills (axType 2)
  { slug: 'ax_skill_supp', name_en: 'Supplemental Skill DMG', name_jp: 'アビ与ダメ上昇', category: 'ax', stat: 'skill_supp', polarity: 1, suffix: nil, base_min: 1, base_max: 5, game_skill_id: 1719 },
  { slug: 'ax_ca_supp', name_en: 'Supplemental C.A. DMG', name_jp: '奥義与ダメ上昇', category: 'ax', stat: 'ca_supp', polarity: 1, suffix: nil, base_min: 1, base_max: 5, game_skill_id: 1720 },
  { slug: 'ax_ele_dmg_red', name_en: 'Elemental DMG Reduction', name_jp: '属性ダメ軽減', category: 'ax', stat: 'ele_dmg_red', polarity: 1, suffix: '%', base_min: 1, base_max: 5, game_skill_id: 1721 },
  { slug: 'ax_na_cap', name_en: 'Normal ATK DMG Cap', name_jp: '通常ダメ上限', category: 'ax', stat: 'na_cap', polarity: 1, suffix: '%', base_min: 0.5, base_max: 1.5, game_skill_id: 1722 },
  # Utility AX Skills (axType 3)
  { slug: 'ax_exp', name_en: 'EXP Gain', name_jp: 'EXP UP', category: 'ax', stat: 'exp', polarity: 1, suffix: '%', base_min: 5, base_max: 10, game_skill_id: 1837 },
  { slug: 'ax_rupie', name_en: 'Rupie Gain', name_jp: '獲得ルピ', category: 'ax', stat: 'rupie', polarity: 1, suffix: '%', base_min: 10, base_max: 20, game_skill_id: 1838 }
 ]
 befoulments = [
  # Befoulments - game_skill_ids from game data (2873-2881, 2876 doesn't exist)
  { slug: 'befoul_atk_down', name_en: 'ATK Down', name_jp: '攻撃力DOWN', category: 'befoulment', stat: 'atk', polarity: -1, suffix: '%', base_min: -12, base_max: -6, game_skill_id: 2873 },
  { slug: 'befoul_ability_dmg_down', name_en: 'Ability DMG Down', name_jp: 'アビリティダメージDOWN', category: 'befoulment', stat: 'ability_dmg', polarity: -1, suffix: '%', base_min: -50, base_max: -50, game_skill_id: 2874 },
  { slug: 'befoul_ca_dmg_down', name_en: 'CA DMG Down', name_jp: '奥義ダメージDOWN', category: 'befoulment', stat: 'ca_dmg', polarity: -1, suffix: '%', base_min: -38, base_max: -26, game_skill_id: 2875 },
  { slug: 'befoul_da_ta_down', name_en: 'DA/TA Down', name_jp: '連撃率DOWN', category: 'befoulment', stat: 'da_ta', polarity: -1, suffix: '%', base_min: -22, base_max: -19, game_skill_id: 2877 },
  { slug: 'befoul_debuff_down', name_en: 'Debuff Success Down', name_jp: '弱体成功率DOWN', category: 'befoulment', stat: 'debuff_success', polarity: -1, suffix: '%', base_min: -16, base_max: -6, game_skill_id: 2878 },
  { slug: 'befoul_hp_down', name_en: 'Max HP Down', name_jp: '最大HP減少', category: 'befoulment', stat: 'hp', polarity: -1, suffix: '%', base_min: -50, base_max: -26, game_skill_id: 2879 },
  { slug: 'befoul_def_down', name_en: 'DEF Down', name_jp: '防御力DOWN', category: 'befoulment', stat: 'def', polarity: -1, suffix: '%', base_min: -25, base_max: -21, game_skill_id: 2880 },
  { slug: 'befoul_dot', name_en: 'Damage Over Time', name_jp: '毎ターンダメージ', category: 'befoulment', stat: 'dot', polarity: -1, suffix: '%', base_min: 6, base_max: 16, game_skill_id: 2881 }
 ]
 (ax_skills + befoulments).each do |attrs|
  modifier = WeaponStatModifier.find_or_initialize_by(slug: attrs[:slug])
  modifier.assign_attributes(attrs)
  modifier.save!
 end
 puts "Created/updated #{WeaponStatModifier.count} weapon stat modifiers"
--- a/docs/planning/befoulments-feature-plan.md
+++ b/docs/planning/befoulments-feature-plan.md
@ -0,0 +1,671 @@
 # Befoulments & WeaponStatModifier Consolidation
 ## Overview
 Implement Befoulments (魔蝕) and consolidate with AX skills using a new `WeaponStatModifier` table.
 ### Terminology
 - **Odiant (禁禍武器)** = A weapon series that has befoulments instead of AX skills
 - **Befoulments (魔蝕)** = Negative stat augments that appear on Odiant weapons
 - **Exorcism Level (退魔Lv)** = Level 0-5 that reduces befoulment strength
 **Key insight:** `augment_skill_info` contains:
 - **AX skills** for regular weapons (`is_odiant_weapon: false`)
 - **Befoulments** for Odiant weapons (`is_odiant_weapon: true`)
 They are mutually exclusive - a weapon has either AX skills OR befoulments, never both.
 ---
 ## Database Schema
 ### 1. New Table: `weapon_stat_modifiers`
 Centralized definition of all weapon stat modifiers (AX skills + befoulments):
 ```ruby
 create_table :weapon_stat_modifiers do |t|
  t.string :slug, null: false, index: { unique: true }  # 'ax_atk', 'befoul_def_down'
  t.string :name_en, null: false
  t.string :name_jp
  t.string :category, null: false      # 'ax' or 'befoulment'
  t.string :stat                       # 'atk', 'def', 'da_ta', 'ca_dmg', 'hp', 'dot', etc.
  t.integer :polarity, default: 1      # 1 = buff, -1 = debuff
  t.string :suffix                     # '%' for percentages, nil for flat values
  t.float :base_min                    # Known min initial value (informational)
  t.float :base_max                    # Known max initial value (informational)
  t.integer :game_skill_id             # Maps to game's skill_id for import
  t.timestamps
 end
 ```
 **Icon convention:** Frontend derives icon path from `slug`:
 - `ax_atk` → `weapon-stat-modifier/ax_atk.png`
 - `befoul_def_down` → `weapon-stat-modifier/befoul_def_down.png`
 Rename game icons (e.g., `ex_skill_def_down` → `befoul_def_down`) to match slugs.
 ### 2. Refactor AX & Add Befoulment Columns (Foreign Keys)
 Replace raw integer `ax_modifier1/2` with foreign keys, and add befoulment FK:
 ```ruby
 # collection_weapons
 # Remove old integer columns
 remove_column :collection_weapons, :ax_modifier1, :integer
 remove_column :collection_weapons, :ax_modifier2, :integer
 # Add FK columns referencing weapon_stat_modifiers
 add_reference :collection_weapons, :ax_modifier1, foreign_key: { to_table: :weapon_stat_modifiers }
 add_reference :collection_weapons, :ax_modifier2, foreign_key: { to_table: :weapon_stat_modifiers }
 add_reference :collection_weapons, :befoulment_modifier, foreign_key: { to_table: :weapon_stat_modifiers }
 add_column :collection_weapons, :befoulment_strength, :float
 add_column :collection_weapons, :exorcism_level, :integer, default: 0
 # grid_weapons - same pattern
 add_reference :grid_weapons, :ax_modifier1, foreign_key: { to_table: :weapon_stat_modifiers }
 add_reference :grid_weapons, :ax_modifier2, foreign_key: { to_table: :weapon_stat_modifiers }
 add_reference :grid_weapons, :befoulment_modifier, foreign_key: { to_table: :weapon_stat_modifiers }
 add_column :grid_weapons, :befoulment_strength, :float
 add_column :grid_weapons, :exorcism_level, :integer, default: 0
 ```
 ### 2b. Data Migration for Existing AX Skills
 Migrate existing `ax_modifier1/2` integer values to FK references:
 ```ruby
 # Run after weapon_stat_modifiers table is seeded
 CollectionWeapon.where.not(ax_modifier1: nil).find_each do |cw|
  modifier = WeaponStatModifier.find_by(game_skill_id: cw.ax_modifier1)
  cw.update_columns(ax_modifier1_id: modifier&.id) if modifier
 end
 CollectionWeapon.where.not(ax_modifier2: nil).find_each do |cw|
  modifier = WeaponStatModifier.find_by(game_skill_id: cw.ax_modifier2)
  cw.update_columns(ax_modifier2_id: modifier&.id) if modifier
 end
 # Same for GridWeapon
 ```
 **Note:** Strength values (`ax_strength1/2`) are preserved as-is since they store the actual value.
 ### 3. WeaponSeries `augment_type` Enum
 Replace `has_ax_skills` boolean with an enum that enforces mutual exclusivity:
 ```ruby
 # Migration
 remove_column :weapon_series, :has_ax_skills, :boolean
 add_column :weapon_series, :augment_type, :integer, default: 0
 # Data migration
 WeaponSeries.where(has_ax_skills: true).update_all(augment_type: 1)
 ```
 ```ruby
 # Model
 enum :augment_type, { none: 0, ax: 1, befoulment: 2 }, default: :none
 scope :with_ax_skills, -> { where(augment_type: :ax) }
 scope :with_befoulments, -> { where(augment_type: :befoulment) }
 ```
 ---
 ## Seed Data
 ### AX Skill Modifiers (Complete List)
 All AX skills from game data with their game_skill_id values:
 ```ruby
 WeaponStatModifier.create!([
  # Primary AX Skills
  { slug: 'ax_atk', name_en: 'ATK', name_jp: '攻撃', category: 'ax', stat: 'atk', polarity: 1, suffix: '%', base_min: 1, base_max: 3.5, game_skill_id: 1589 },
  { slug: 'ax_def', name_en: 'DEF', name_jp: '防御', category: 'ax', stat: 'def', polarity: 1, suffix: '%', base_min: 1, base_max: 8, game_skill_id: 1590 },
  { slug: 'ax_hp', name_en: 'HP', name_jp: 'HP', category: 'ax', stat: 'hp', polarity: 1, suffix: '%', base_min: 1, base_max: 11, game_skill_id: 1588 },
  { slug: 'ax_ca_dmg', name_en: 'C.A. DMG', name_jp: '奥義ダメ', category: 'ax', stat: 'ca_dmg', polarity: 1, suffix: '%', base_min: 2, base_max: 8.5, game_skill_id: 1591 },
  { slug: 'ax_multiattack', name_en: 'Multiattack Rate', name_jp: '連撃率', category: 'ax', stat: 'multiattack', polarity: 1, suffix: '%', base_min: 1, base_max: 4, game_skill_id: 1592 },
  # Secondary AX Skills
  { slug: 'ax_debuff_res', name_en: 'Debuff Resistance', name_jp: '弱体耐性', category: 'ax', stat: 'debuff_res', polarity: 1, suffix: '%', base_min: 1, base_max: 3, game_skill_id: 1593 },
  { slug: 'ax_ele_atk', name_en: 'Elemental ATK', name_jp: '全属性攻撃力', category: 'ax', stat: 'ele_atk', polarity: 1, suffix: '%', base_min: 1, base_max: 5, game_skill_id: 1594 },
  { slug: 'ax_healing', name_en: 'Healing', name_jp: '回復性能', category: 'ax', stat: 'healing', polarity: 1, suffix: '%', base_min: 2, base_max: 5, game_skill_id: 1595 },
  { slug: 'ax_da', name_en: 'Double Attack Rate', name_jp: 'DA確率', category: 'ax', stat: 'da', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1596 },
  { slug: 'ax_ta', name_en: 'Triple Attack Rate', name_jp: 'TA確率', category: 'ax', stat: 'ta', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1597 },
  { slug: 'ax_ca_cap', name_en: 'C.A. DMG Cap', name_jp: '奥義上限', category: 'ax', stat: 'ca_cap', polarity: 1, suffix: '%', base_min: 1, base_max: 2, game_skill_id: 1599 },
  { slug: 'ax_stamina', name_en: 'Stamina', name_jp: '渾身', category: 'ax', stat: 'stamina', polarity: 1, suffix: nil, base_min: 1, base_max: 3, game_skill_id: 1600 },
  { slug: 'ax_enmity', name_en: 'Enmity', name_jp: '背水', category: 'ax', stat: 'enmity', polarity: 1, suffix: nil, base_min: 1, base_max: 3, game_skill_id: 1601 },
  # Extended AX Skills (axType 2)
  { slug: 'ax_skill_supp', name_en: 'Supplemental Skill DMG', name_jp: 'アビ与ダメ上昇', category: 'ax', stat: 'skill_supp', polarity: 1, suffix: nil, base_min: 1, base_max: 5, game_skill_id: 1719 },
  { slug: 'ax_ca_supp', name_en: 'Supplemental C.A. DMG', name_jp: '奥義与ダメ上昇', category: 'ax', stat: 'ca_supp', polarity: 1, suffix: nil, base_min: 1, base_max: 5, game_skill_id: 1720 },
  { slug: 'ax_ele_dmg_red', name_en: 'Elemental DMG Reduction', name_jp: '属性ダメ軽減', category: 'ax', stat: 'ele_dmg_red', polarity: 1, suffix: '%', base_min: 1, base_max: 5, game_skill_id: 1721 },
  { slug: 'ax_na_cap', name_en: 'Normal ATK DMG Cap', name_jp: '通常ダメ上限', category: 'ax', stat: 'na_cap', polarity: 1, suffix: '%', base_min: 0.5, base_max: 1.5, game_skill_id: 1722 },
  # Utility AX Skills (axType 3)
  { slug: 'ax_exp', name_en: 'EXP Gain', name_jp: 'EXP UP', category: 'ax', stat: 'exp', polarity: 1, suffix: '%', base_min: 5, base_max: 10, game_skill_id: 1837 },
  { slug: 'ax_rupie', name_en: 'Rupie Gain', name_jp: '獲得ルピ', category: 'ax', stat: 'rupie', polarity: 1, suffix: '%', base_min: 10, base_max: 20, game_skill_id: 1838 },
 ])
 ```
 ### Befoulment Modifiers
 ```ruby
 # game_skill_id values will be populated as we discover them - we know 2880 = DEF Down
 WeaponStatModifier.create!([
  { slug: 'befoul_atk_down', name_en: 'ATK Down', name_jp: '攻撃力DOWN', category: 'befoulment', stat: 'atk', polarity: -1, suffix: '%', base_min: -12, base_max: -6 },
  { slug: 'befoul_def_down', name_en: 'DEF Down', name_jp: '防御力DOWN', category: 'befoulment', stat: 'def', polarity: -1, suffix: '%', base_min: -25, base_max: -21, game_skill_id: 2880 },
  { slug: 'befoul_da_ta_down', name_en: 'DA/TA Down', name_jp: '連撃率DOWN', category: 'befoulment', stat: 'da_ta', polarity: -1, suffix: '%', base_min: -22, base_max: -19 },
  { slug: 'befoul_ca_dmg_down', name_en: 'CA DMG Down', name_jp: '奥義ダメージDOWN', category: 'befoulment', stat: 'ca_dmg', polarity: -1, suffix: '%', base_min: -38, base_max: -26 },
  { slug: 'befoul_dot', name_en: 'Damage Over Time', name_jp: '毎ターンダメージ', category: 'befoulment', stat: 'dot', polarity: -1, suffix: '%', base_min: 6, base_max: 16 },
  { slug: 'befoul_hp_down', name_en: 'Max HP Down', name_jp: '最大HP減少', category: 'befoulment', stat: 'hp', polarity: -1, suffix: '%', base_min: -50, base_max: -26 },
  { slug: 'befoul_debuff_down', name_en: 'Debuff Success Down', name_jp: '弱体成功率DOWN', category: 'befoulment', stat: 'debuff_success', polarity: -1, suffix: '%', base_min: -16, base_max: -6 },
  { slug: 'befoul_ability_dmg_down', name_en: 'Ability DMG Down', name_jp: 'アビリティダメージDOWN', category: 'befoulment', stat: 'ability_dmg', polarity: -1, suffix: '%', base_min: -50, base_max: -50 },
 ])
 ```
 ---
 ## Model Changes
 ### WeaponStatModifier Model
 ```ruby
 # app/models/weapon_stat_modifier.rb
 class WeaponStatModifier < ApplicationRecord
  validates :slug, presence: true, uniqueness: true
  validates :name_en, presence: true
  validates :category, presence: true, inclusion: { in: %w[ax befoulment] }
  validates :polarity, inclusion: { in: [-1, 1] }
  scope :ax_skills, -> { where(category: 'ax') }
  scope :befoulments, -> { where(category: 'befoulment') }
  def self.find_by_game_skill_id(id)
    find_by(game_skill_id: id.to_i)
  end
 end
 ```
 ### CollectionWeapon Changes
 ```ruby
 # app/models/collection_weapon.rb
 # Replace old integer references with proper associations
 belongs_to :ax_modifier1, class_name: 'WeaponStatModifier', optional: true
 belongs_to :ax_modifier2, class_name: 'WeaponStatModifier', optional: true
 belongs_to :befoulment_modifier, class_name: 'WeaponStatModifier', optional: true
 validates :exorcism_level, numericality: {
  only_integer: true,
  greater_than_or_equal_to: 0,
  less_than_or_equal_to: 5
 }, allow_nil: true
 validate :validate_ax_skills
 validate :validate_befoulment_fields
 def validate_ax_skills
  # AX skill 1: must have both modifier and strength
  if (ax_modifier1.present? && ax_strength1.blank?) ||
     (ax_modifier1.blank? && ax_strength1.present?)
    errors.add(:base, "AX skill 1 must have both modifier and strength")
  end
  # AX skill 2: must have both modifier and strength
  if (ax_modifier2.present? && ax_strength2.blank?) ||
     (ax_modifier2.blank? && ax_strength2.present?)
    errors.add(:base, "AX skill 2 must have both modifier and strength")
  end
  # Validate category is 'ax'
  if ax_modifier1.present? && ax_modifier1.category != 'ax'
    errors.add(:ax_modifier1, "must be an AX skill modifier")
  end
  if ax_modifier2.present? && ax_modifier2.category != 'ax'
    errors.add(:ax_modifier2, "must be an AX skill modifier")
  end
 end
 def validate_befoulment_fields
  if (befoulment_modifier.present? && befoulment_strength.blank?) ||
     (befoulment_modifier.blank? && befoulment_strength.present?)
    errors.add(:base, "Befoulment must have both modifier and strength")
  end
  # Validate category is 'befoulment'
  if befoulment_modifier.present? && befoulment_modifier.category != 'befoulment'
    errors.add(:befoulment_modifier, "must be a befoulment modifier")
  end
 end
 ```
 ### GridWeapon Changes
 ```ruby
 # app/models/grid_weapon.rb
 # Same associations as CollectionWeapon
 belongs_to :ax_modifier1, class_name: 'WeaponStatModifier', optional: true
 belongs_to :ax_modifier2, class_name: 'WeaponStatModifier', optional: true
 belongs_to :befoulment_modifier, class_name: 'WeaponStatModifier', optional: true
 # Same validations as CollectionWeapon
 ```
 - Update `sync_from_collection!` to include befoulment fields
 - Update `out_of_sync?` to check befoulment fields
 - Update Amoeba config to nullify befoulment fields on copy
 ---
 ## API Changes
 ### Blueprint Serialization
 ```ruby
 # collection_weapon_blueprint.rb
 # AX skills - now with full modifier object
 field :ax, if: ->(_, obj, _) { obj.ax_modifier1.present? } do |obj|
  skills = []
  if obj.ax_modifier1.present?
    skills << {
      modifier: WeaponStatModifierBlueprint.render_as_hash(obj.ax_modifier1),
      strength: obj.ax_strength1
    }
  end
  if obj.ax_modifier2.present?
    skills << {
      modifier: WeaponStatModifierBlueprint.render_as_hash(obj.ax_modifier2),
      strength: obj.ax_strength2
    }
  end
  skills
 end
 # Befoulment - with full modifier object
 field :befoulment, if: ->(_, obj, _) { obj.befoulment_modifier.present? } do |obj|
  {
    modifier: WeaponStatModifierBlueprint.render_as_hash(obj.befoulment_modifier),
    strength: obj.befoulment_strength,
    exorcism_level: obj.exorcism_level
  }
 end
 # grid_weapon_blueprint.rb - similar
 ```
 ### WeaponStatModifierBlueprint
 ```ruby
 # app/blueprints/api/v1/weapon_stat_modifier_blueprint.rb
 class Api::V1::WeaponStatModifierBlueprint < Blueprinter::Base
  identifier :id
  fields :slug, :name_en, :name_jp, :category, :stat, :polarity, :suffix
 end
 ```
 ### New Endpoint: GET /weapon_stat_modifiers
 Return all weapon stat modifiers for frontend reference:
 ```ruby
 # app/controllers/api/v1/weapon_stat_modifiers_controller.rb
 def index
  @modifiers = WeaponStatModifier.all
  render json: WeaponStatModifierBlueprint.render(@modifiers, root: :weapon_stat_modifiers)
 end
 ```
 ### Controller Params
 Update `weapon_params` in both controllers:
 ```ruby
 # Replace :ax_modifier1, :ax_modifier2 with FK versions
 :ax_modifier1_id, :ax_strength1, :ax_modifier2_id, :ax_strength2,
 :befoulment_modifier_id, :befoulment_strength, :exorcism_level
 ```
 ---
 ## Import Service
 ### Game JSON Structure
 **Odiant weapon (with befoulment):**
 ```json
 {
  "augment_skill_info": [[{ "skill_id": 2880, "effect_value": "25", "show_value": "-25%" }]],
  "odiant": {
    "is_odiant_weapon": true,
    "exorcision_level": 1,
    "max_exorcision_level": 5
  }
 }
 ```
 **Regular weapon (with AX skills):**
 ```json
 {
  "augment_skill_info": [[
    { "skill_id": 1589, "effect_value": "3", "show_value": "+3%" },
    { "skill_id": 1719, "effect_value": "1_2000", "show_value": "+3" }
  ]],
  "odiant": {
    "is_odiant_weapon": false,
    "exorcision_level": 0
  }
 }
 ```
 **Key insight:** Same `augment_skill_info` structure, differentiated by `is_odiant_weapon`:
 - `true` → parse as befoulment (skill_id 2880+)
 - `false` → parse as AX skills (skill_id 1588-1722)
 ### WeaponImportService Updates
 Add a cache for WeaponStatModifier lookups:
 ```ruby
 def initialize(user, game_data, options = {})
  # ... existing code ...
  @modifier_cache = {}  # Cache for WeaponStatModifier lookups
 end
 def build_collection_weapon_attrs(item, weapon)
  param = item['param'] || {}
  attrs = {
    weapon: weapon,
    game_id: param['id'].to_s,
    # ... existing attrs ...
  }
  # Check if this is an Odiant (befoulment) weapon
  odiant = param['odiant']
  if odiant && odiant['is_odiant_weapon'] == true
    # Parse befoulment from augment_skill_info
    befoulment = parse_befoulment(param['augment_skill_info'])
    if befoulment
      attrs[:befoulment_modifier_id] = befoulment[:modifier_id]
      attrs[:befoulment_strength] = befoulment[:strength]
    end
    attrs[:exorcism_level] = odiant['exorcision_level'].to_i
  else
    # Regular weapon - parse AX skills
    ax_attrs = parse_ax_skills(param['augment_skill_info'])
    attrs.merge!(ax_attrs) if ax_attrs
  end
  # ... rest of existing code (awakening, etc) ...
  attrs
 end
 # Updated to return FK id instead of raw game_skill_id
 def parse_ax_skills(augment_skill_info)
  return nil if augment_skill_info.blank? || !augment_skill_info.is_a?(Array)
  skills = augment_skill_info.first
  return nil if skills.blank? || !skills.is_a?(Array)
  attrs = {}
  # First AX skill
  if skills[0].is_a?(Hash)
    ax1 = parse_single_ax_skill(skills[0])
    if ax1
      attrs[:ax_modifier1_id] = ax1[:modifier_id]
      attrs[:ax_strength1] = ax1[:strength]
    end
  end
  # Second AX skill
  if skills[1].is_a?(Hash)
    ax2 = parse_single_ax_skill(skills[1])
    if ax2
      attrs[:ax_modifier2_id] = ax2[:modifier_id]
      attrs[:ax_strength2] = ax2[:strength]
    end
  end
  attrs.empty? ? nil : attrs
 end
 def parse_single_ax_skill(skill)
  return nil unless skill['skill_id'].present?
  game_skill_id = skill['skill_id'].to_i
  modifier = find_modifier_by_game_skill_id(game_skill_id)
  return nil unless modifier
  strength = parse_ax_strength(skill['effect_value'], skill['show_value'])
  return nil unless strength
  { modifier_id: modifier.id, strength: strength }
 end
 def parse_befoulment(augment_skill_info)
  return nil if augment_skill_info.blank? || !augment_skill_info.is_a?(Array)
  skills = augment_skill_info.first
  return nil if skills.blank? || !skills.is_a?(Array)
  skill = skills.first
  return nil unless skill.is_a?(Hash) && skill['skill_id'].present?
  game_skill_id = skill['skill_id'].to_i
  modifier = find_modifier_by_game_skill_id(game_skill_id)
  return nil unless modifier
  {
    modifier_id: modifier.id,
    strength: parse_befoulment_strength(skill['effect_value'], skill['show_value'])
  }
 end
 def find_modifier_by_game_skill_id(game_skill_id)
  @modifier_cache[game_skill_id] ||= WeaponStatModifier.find_by(game_skill_id: game_skill_id)
 end
 def parse_befoulment_strength(effect_value, show_value)
  # show_value has the sign: "-25%"
  # effect_value is unsigned: "25"
  if show_value.present?
    show_value.to_s.gsub('%', '').to_f
  elsif effect_value.present?
    -effect_value.to_f
  end
 end
 ```
 **Note:** Unknown `game_skill_id` values will be skipped (modifier not found). This is acceptable - we can add new modifiers to the seed data as we discover them.
 ---
 ## Files to Create/Modify
 | File | Action |
 |------|--------|
 | **Migrations** | |
 | `db/migrate/xxx_create_weapon_stat_modifiers.rb` | Create - new reference table |
 | `db/migrate/xxx_refactor_ax_and_add_befoulments.rb` | Create - replace ax_modifier integers with FKs, add befoulment FKs |
 | `db/migrate/xxx_replace_has_ax_skills_with_augment_type.rb` | Create - enum migration with data migration |
 | `db/data/xxx_migrate_ax_modifiers_to_fk.rb` | Create - data migration to convert existing ax_modifier values to FK references |
 | **Models** | |
 | `app/models/weapon_stat_modifier.rb` | Create |
 | `app/models/collection_weapon.rb` | Modify - add befoulment validation |
 | `app/models/grid_weapon.rb` | Modify - add befoulment fields, sync |
 | `app/models/weapon_series.rb` | Modify - replace has_ax_skills with augment_type enum |
 | **Blueprints** | |
 | `app/blueprints/api/v1/weapon_stat_modifier_blueprint.rb` | Create |
 | `app/blueprints/api/v1/collection_weapon_blueprint.rb` | Modify - add befoulment serialization |
 | `app/blueprints/api/v1/grid_weapon_blueprint.rb` | Modify - add befoulment serialization |
 | `app/blueprints/api/v1/weapon_series_blueprint.rb` | Modify - replace has_ax_skills with augment_type |
 | `app/blueprints/api/v1/weapon_blueprint.rb` | Modify - update series.has_ax_skills reference |
 | **Controllers** | |
 | `app/controllers/api/v1/weapon_stat_modifiers_controller.rb` | Create |
 | `app/controllers/api/v1/collection_weapons_controller.rb` | Modify - permit befoulment params |
 | `app/controllers/api/v1/grid_weapons_controller.rb` | Modify - permit befoulment params |
 | `app/controllers/api/v1/weapon_series_controller.rb` | Modify - permit augment_type instead of has_ax_skills |
 | **Services & Seeds** | |
 | `app/services/weapon_import_service.rb` | Modify - parse befoulments |
 | `db/seeds/weapon_stat_modifiers.rb` | Create |
 | **Config & Tests** | |
 | `config/routes.rb` | Modify - add weapon_stat_modifiers route |
 | `spec/factories/weapon_series.rb` | Modify - replace has_ax_skills with augment_type |
 ---
 ## API Breaking Changes
 ### 1. WeaponSeries: `has_ax_skills` → `augment_type`
 **Before:**
 ```json
 { "has_ax_skills": true }
 ```
 **After:**
 ```json
 { "augment_type": "ax" }  // or "befoulment" or "none"
 ```
 Frontend: `augment_type === 'ax'` instead of `has_ax_skills === true`.
 ### 2. Collection/GridWeapon: AX skill structure changed
 **Before:**
 ```json
 {
  "ax_modifier1": 1589,
  "ax_strength1": 3.0,
  "ax_modifier2": 1719,
  "ax_strength2": 2000
 }
 ```
 **After:**
 ```json
 {
  "ax": [
    {
      "modifier": { "id": 1, "slug": "ax_atk", "name_en": "ATK Up", "category": "ax", ... },
      "strength": 3.0
    },
    {
      "modifier": { "id": 5, "slug": "ax_ability_dmg", "name_en": "Ability DMG Up", "category": "ax", ... },
      "strength": 2000
    }
  ]
 }
 ```
 Frontend: Access via `weapon.ax[0].modifier.slug` instead of `weapon.ax_modifier1`.
 ---
 ## Implementation Considerations
 ### Migration Order
 Migrations must be deployed in this order:
 1. `create_weapon_stat_modifiers` - Create table + seed data
 2. `add_ax_and_befoulment_fk_columns` - Add new FK columns (keep old integer columns)
 3. `migrate_ax_modifiers_to_fk` - Data migration: lookup existing values → FK refs
 4. `remove_old_ax_modifier_columns` - Remove old integer columns
 5. `replace_has_ax_skills_with_augment_type` - WeaponSeries enum change
 ### GridWeapon Amoeba Config
 Update nullify list for party cloning:
 ```ruby
 amoeba do
  nullify :ax_modifier1_id
  nullify :ax_modifier2_id
  nullify :ax_strength1
  nullify :ax_strength2
  nullify :befoulment_modifier_id
  nullify :befoulment_strength
  nullify :exorcism_level
 end
 ```
 ### Unknown Skill ID Logging
 When import encounters unknown `game_skill_id`, log with icon image for discovery:
 ```ruby
 Rails.logger.warn(
  "[WeaponImportService] Unknown augment skill_id=#{game_skill_id} " \
  "icon=#{skill['augment_skill_icon_image']}"
 )
 ```
 ### Database Indexes
 Add index on `weapon_stat_modifiers.game_skill_id` for fast import lookups:
 ```ruby
 add_index :weapon_stat_modifiers, :game_skill_id, unique: true
 ```
 ### Coordinated Release
 Frontend and backend releases will be coordinated. No backwards compatibility layer needed.
 ---
 ## Next Steps
 1. ✅ **Game JSON samples** - received for both Odiant and regular weapons
 2. **Identify Odiant weapon series** in database (set `augment_type: :befoulment`)
 3. **Discover remaining game_skill_ids** for other befoulment types (we know 2880 = DEF Down)
 4. **Verify AX skill IDs** match between AX_MAPPING and game data
 ## Known Skill IDs
 ### AX Skills (Complete)
 | skill_id | Stat | Name (EN) | Name (JP) | Suffix |
 |----------|------|-----------|-----------|--------|
 | 1588 | hp | HP | HP | % |
 | 1589 | atk | ATK | 攻撃 | % |
 | 1590 | def | DEF | 防御 | % |
 | 1591 | ca_dmg | C.A. DMG | 奥義ダメ | % |
 | 1592 | multiattack | Multiattack Rate | 連撃率 | % |
 | 1593 | debuff_res | Debuff Resistance | 弱体耐性 | % |
 | 1594 | ele_atk | Elemental ATK | 全属性攻撃力 | % |
 | 1595 | healing | Healing | 回復性能 | % |
 | 1596 | da | Double Attack Rate | DA確率 | % |
 | 1597 | ta | Triple Attack Rate | TA確率 | % |
 | 1599 | ca_cap | C.A. DMG Cap | 奥義上限 | % |
 | 1600 | stamina | Stamina | 渾身 | - |
 | 1601 | enmity | Enmity | 背水 | - |
 | 1719 | skill_supp | Supplemental Skill DMG | アビ与ダメ上昇 | - |
 | 1720 | ca_supp | Supplemental C.A. DMG | 奥義与ダメ上昇 | - |
 | 1721 | ele_dmg_red | Elemental DMG Reduction | 属性ダメ軽減 | % |
 | 1722 | na_cap | Normal ATK DMG Cap | 通常ダメ上限 | % |
 | 1837 | exp | EXP Gain | EXP UP | % |
 | 1838 | rupie | Rupie Gain | 獲得ルピ | % |
 ### Befoulments (Partial - more to discover)
 | skill_id | Stat | Name (EN) | Name (JP) |
 |----------|------|-----------|-----------|
 | 2880 | def | DEF Down | 防御力DOWN |
 | ? | atk | ATK Down | 攻撃力DOWN |
 | ? | da_ta | DA/TA Down | 連撃率DOWN |
 | ? | ca_dmg | CA DMG Down | 奥義ダメージDOWN |
 | ? | dot | Damage Over Time | 毎ターンダメージ |
 | ? | hp | Max HP Down | 最大HP減少 |
 | ? | debuff_success | Debuff Success Down | 弱体成功率DOWN |
 | ? | ability_dmg | Ability DMG Down | アビリティダメージDOWN |
 (Befoulment skill_ids will be discovered as users import Odiant weapons)
--- a/spec/factories/collection_weapons.rb
+++ b/spec/factories/collection_weapons.rb
@ -8,12 +8,17 @@ FactoryBot.define do
    awakening_level { 1 }
    element { nil } # Only used for element-changeable weapons
-    # AX skills
+    # AX skills (FK to weapon_stat_modifiers)
    ax_modifier1 { nil }
    ax_strength1 { nil }
    ax_modifier2 { nil }
    ax_strength2 { nil }
    # Befoulment (FK to weapon_stat_modifiers)
    befoulment_modifier { nil }
    befoulment_strength { nil }
    exorcism_level { 0 }
    # Weapon keys
    weapon_key1 { nil }
    weapon_key2 { nil }
@ -75,10 +80,24 @@ FactoryBot.define do
    # Trait for AX weapon with skills
    trait :with_ax do
      ax_modifier1 { 1 } # Attack modifier
      ax_strength1 { 3.5 }
      ax_modifier2 { 2 } # HP modifier
      ax_strength2 { 10.0 }
      after(:build) do |collection_weapon|
        collection_weapon.ax_modifier1 = WeaponStatModifier.find_by(slug: 'ax_atk') ||
                                         FactoryBot.create(:weapon_stat_modifier, :ax_atk)
        collection_weapon.ax_modifier2 = WeaponStatModifier.find_by(slug: 'ax_hp') ||
                                         FactoryBot.create(:weapon_stat_modifier, :ax_hp)
      end
    end
    # Trait for Odiant weapon with befoulment
    trait :with_befoulment do
      befoulment_strength { 23.0 }
      exorcism_level { 2 }
      after(:build) do |collection_weapon|
        collection_weapon.befoulment_modifier = WeaponStatModifier.find_by(slug: 'befoul_def_down') ||
                                                FactoryBot.create(:weapon_stat_modifier, :befoul_def_down)
      end
    end
    # Trait for element-changed weapon (Revans weapons)
--- a/spec/factories/grid_weapons.rb
+++ b/spec/factories/grid_weapons.rb
@ -12,6 +12,39 @@ FactoryBot.define do
    transcendence_step { 0 }
    mainhand { false }
    # AX skills (FK to weapon_stat_modifiers)
    ax_modifier1 { nil }
    ax_strength1 { nil }
    ax_modifier2 { nil }
    ax_strength2 { nil }
    # Befoulment (FK to weapon_stat_modifiers)
    befoulment_modifier { nil }
    befoulment_strength { nil }
    exorcism_level { 0 }
    # Optional associations for weapon keys and awakening are left as nil by default.
    # Trait for AX weapon with skills
    trait :with_ax do
      ax_strength1 { 3.5 }
      ax_strength2 { 10.0 }
      after(:build) do |grid_weapon|
        grid_weapon.ax_modifier1 = WeaponStatModifier.find_by(slug: 'ax_atk') ||
                                   FactoryBot.create(:weapon_stat_modifier, :ax_atk)
        grid_weapon.ax_modifier2 = WeaponStatModifier.find_by(slug: 'ax_hp') ||
                                   FactoryBot.create(:weapon_stat_modifier, :ax_hp)
      end
    end
    # Trait for Odiant weapon with befoulment
    trait :with_befoulment do
      befoulment_strength { 23.0 }
      exorcism_level { 2 }
      after(:build) do |grid_weapon|
        grid_weapon.befoulment_modifier = WeaponStatModifier.find_by(slug: 'befoul_def_down') ||
                                          FactoryBot.create(:weapon_stat_modifier, :befoul_def_down)
      end
    end
  end
 end
--- a/spec/factories/weapon_series.rb
+++ b/spec/factories/weapon_series.rb
@ -9,7 +9,7 @@ FactoryBot.define do
    element_changeable { false }
    has_weapon_keys { false }
    has_awakening { false }
-    has_ax_skills { false }
+    augment_type { :none }
    trait :gacha do
      slug { 'gacha' }
@ -96,5 +96,21 @@ FactoryBot.define do
    trait :with_weapon_keys do
      has_weapon_keys { true }
    end
    trait :with_ax_skills do
      augment_type { :ax }
    end
    trait :with_befoulments do
      augment_type { :befoulment }
    end
    trait :odiant do
      slug { 'odiant' }
      name_en { 'Odiant' }
      name_jp { '禁禍武器' }
      order { 50 }
      augment_type { :befoulment }
    end
  end
 end
--- a/spec/factories/weapon_stat_modifiers.rb
+++ b/spec/factories/weapon_stat_modifiers.rb
@ -0,0 +1,47 @@
 # frozen_string_literal: true
 FactoryBot.define do
  factory :weapon_stat_modifier do
    sequence(:slug) { |n| "ax-modifier-#{n}" }
    sequence(:name_en) { |n| "AX Modifier #{n}" }
    category { 'ax' }
    polarity { 1 }
    trait :ax_atk do
      slug { 'ax_atk' }
      name_en { 'ATK' }
      category { 'ax' }
      stat { 'atk' }
      polarity { 1 }
      suffix { '%' }
      game_skill_id { 1589 }
    end
    trait :ax_hp do
      slug { 'ax_hp' }
      name_en { 'HP' }
      category { 'ax' }
      stat { 'hp' }
      polarity { 1 }
      suffix { '%' }
      game_skill_id { 1588 }
    end
    trait :befoulment do
      sequence(:slug) { |n| "befoul-modifier-#{n}" }
      sequence(:name_en) { |n| "Befoulment #{n}" }
      category { 'befoulment' }
      polarity { -1 }
    end
    trait :befoul_def_down do
      slug { 'befoul_def_down' }
      name_en { 'DEF Down' }
      category { 'befoulment' }
      stat { 'def' }
      polarity { -1 }
      suffix { '%' }
      game_skill_id { 2880 }
    end
  end
 end
--- a/spec/models/collection_weapon_spec.rb
+++ b/spec/models/collection_weapon_spec.rb
@ -76,9 +76,14 @@ RSpec.describe CollectionWeapon, type: :model do
    end
    describe 'AX skill validations' do
      let(:ax_modifier) do
        WeaponStatModifier.find_by(slug: 'ax_atk') ||
          create(:weapon_stat_modifier, :ax_atk)
      end
      context 'when AX skill has only modifier' do
        it 'is invalid' do
-          collection_weapon = build(:collection_weapon, ax_modifier1: 1, ax_strength1: nil)
+          collection_weapon = build(:collection_weapon, ax_modifier1: ax_modifier, ax_strength1: nil)
          expect(collection_weapon).not_to be_valid
          expect(collection_weapon.errors[:base]).to include('AX skill 1 must have both modifier and strength')
        end
@ -94,7 +99,7 @@ RSpec.describe CollectionWeapon, type: :model do
      context 'when AX skill has both modifier and strength' do
        it 'is valid' do
-          collection_weapon = build(:collection_weapon, ax_modifier1: 1, ax_strength1: 3.5)
+          collection_weapon = build(:collection_weapon, ax_modifier1: ax_modifier, ax_strength1: 3.5)
          expect(collection_weapon).to be_valid
        end
      end
@ -215,9 +220,11 @@ RSpec.describe CollectionWeapon, type: :model do
        ax_weapon = create(:collection_weapon, :with_ax)
        aggregate_failures do
-          expect(ax_weapon.ax_modifier1).to eq(1)
+          expect(ax_weapon.ax_modifier1).to be_a(WeaponStatModifier)
          expect(ax_weapon.ax_modifier1.slug).to eq('ax_atk')
          expect(ax_weapon.ax_strength1).to eq(3.5)
-          expect(ax_weapon.ax_modifier2).to eq(2)
+          expect(ax_weapon.ax_modifier2).to be_a(WeaponStatModifier)
          expect(ax_weapon.ax_modifier2.slug).to eq('ax_hp')
          expect(ax_weapon.ax_strength2).to eq(10.0)
        end
      end
--- a/spec/requests/collection_weapons_controller_spec.rb
+++ b/spec/requests/collection_weapons_controller_spec.rb
@ -162,11 +162,16 @@ RSpec.describe 'Collection Weapons API', type: :request do
    end
    it 'creates weapon with AX skills' do
      ax_atk = WeaponStatModifier.find_by(slug: 'ax_atk') ||
               create(:weapon_stat_modifier, :ax_atk)
      ax_hp = WeaponStatModifier.find_by(slug: 'ax_hp') ||
              create(:weapon_stat_modifier, :ax_hp)
      ax_attributes = valid_attributes.deep_merge(
        collection_weapon: {
-          ax_modifier1: 1,
+          ax_modifier1_id: ax_atk.id,
          ax_strength1: 3.5,
-          ax_modifier2: 2,
+          ax_modifier2_id: ax_hp.id,
          ax_strength2: 2.0
        }
      )
@ -176,14 +181,17 @@ RSpec.describe 'Collection Weapons API', type: :request do
      expect(response).to have_http_status(:created)
      json = JSON.parse(response.body)
      expect(json['ax']).to be_present
-      expect(json['ax'].first['modifier']).to eq(1)
+      expect(json['ax'].first['modifier']['slug']).to eq('ax_atk')
      expect(json['ax'].first['strength']).to eq(3.5)
    end
    it 'returns error with incomplete AX skills' do
      ax_atk = WeaponStatModifier.find_by(slug: 'ax_atk') ||
               create(:weapon_stat_modifier, :ax_atk)
      invalid_ax = valid_attributes.deep_merge(
        collection_weapon: {
-          ax_modifier1: 1
+          ax_modifier1_id: ax_atk.id
          # Missing ax_strength1
        }
      )
--- a/spec/requests/grid_weapons_controller_spec.rb
+++ b/spec/requests/grid_weapons_controller_spec.rb
@ -105,8 +105,8 @@ RSpec.describe 'GridWeapons API', type: :request do
            weapon_key1_id: nil,
            weapon_key2_id: nil,
            weapon_key3_id: nil,
-            ax_modifier1: nil,
+            ax_modifier1_id: nil,
-            ax_modifier2: nil,
+            ax_modifier2_id: nil,
            ax_strength1: nil,
            ax_strength2: nil,
            awakening_id: nil,
@ -197,8 +197,8 @@ RSpec.describe 'GridWeapons API', type: :request do
          weapon_key1_id: nil,
          weapon_key2_id: nil,
          weapon_key3_id: nil,
-          ax_modifier1: nil,
+          ax_modifier1_id: nil,
-          ax_modifier2: nil,
+          ax_modifier2_id: nil,
          ax_strength1: nil,
          ax_strength2: nil,
          awakening_id: nil,
--- a/spec/services/processors/weapon_processor_spec.rb
+++ b/spec/services/processors/weapon_processor_spec.rb
@ -40,7 +40,25 @@ RSpec.describe Processors::WeaponProcessor, type: :model do
  describe '#process_weapon_ax' do
    let(:grid_weapon) { build(:grid_weapon, party: party) }
-    it 'flattens nested augment_skill_info and assigns ax_modifier and ax_strength' do
+
    let!(:ax_hp_modifier) do
      WeaponStatModifier.find_by(slug: 'ax_hp') ||
        create(:weapon_stat_modifier, :ax_hp)
    end
    let!(:ax_ca_dmg_modifier) do
      WeaponStatModifier.find_by(slug: 'ax_ca_dmg') ||
        create(:weapon_stat_modifier,
               slug: 'ax_ca_dmg',
               name_en: 'C.A. DMG',
               category: 'ax',
               stat: 'ca_dmg',
               polarity: 1,
               suffix: '%',
               game_skill_id: 1591)
    end
    it 'flattens nested augment_skill_info and assigns ax_modifier_id and ax_strength' do
      ax_skill_info = [
        [
          { 'skill_id' => '1588', 'effect_value' => '3', 'show_value' => '3%' },
@ -48,10 +66,10 @@ RSpec.describe Processors::WeaponProcessor, type: :model do
        ]
      ]
      processor.send(:process_weapon_ax, grid_weapon, ax_skill_info)
-      expect(grid_weapon.ax_modifier1).to eq(2) # from 1588 → 2
+      expect(grid_weapon.ax_modifier1).to eq(ax_hp_modifier)
-      expect(grid_weapon.ax_strength1).to eq(3)
+      expect(grid_weapon.ax_strength1).to eq(3.0)
-      expect(grid_weapon.ax_modifier2).to eq(3) # from 1591 → 3
+      expect(grid_weapon.ax_modifier2).to eq(ax_ca_dmg_modifier)
-      expect(grid_weapon.ax_strength2).to eq(5)
+      expect(grid_weapon.ax_strength2).to eq(5.0)
    end
  end
--- a/spec/services/weapon_import_service_spec.rb
+++ b/spec/services/weapon_import_service_spec.rb
@ -57,6 +57,29 @@ RSpec.describe WeaponImportService, type: :service do
      create(:awakening, :for_weapon, slug: 'weapon-heal', name_en: 'Healing')
  end
  # Create weapon stat modifiers for AX skill tests
  let!(:ax_atk_modifier) do
    WeaponStatModifier.find_by(slug: 'ax_atk') ||
      create(:weapon_stat_modifier, :ax_atk)
  end
  let!(:ax_hp_modifier) do
    WeaponStatModifier.find_by(slug: 'ax_hp') ||
      create(:weapon_stat_modifier, :ax_hp)
  end
  let!(:ax_ca_dmg_modifier) do
    WeaponStatModifier.find_by(slug: 'ax_ca_dmg') ||
      create(:weapon_stat_modifier,
             slug: 'ax_ca_dmg',
             name_en: 'C.A. DMG',
             category: 'ax',
             stat: 'ca_dmg',
             polarity: 1,
             suffix: '%',
             game_skill_id: 1591)
  end
  before do
    standard_weapon
    transcendable_weapon
@ -279,12 +302,12 @@ RSpec.describe WeaponImportService, type: :service do
                'augment_skill_info' => [
                  [
                    {
-                      'skill_id' => 1,
+                      'skill_id' => 1589,  # ATK modifier
                      'effect_value' => '7',
                      'show_value' => '7%'
                    },
                    {
-                      'skill_id' => 2,
+                      'skill_id' => 1588,  # HP modifier
                      'effect_value' => '2_4',
                      'show_value' => '4%'
                    }
@ -302,7 +325,7 @@ RSpec.describe WeaponImportService, type: :service do
        result = service.import
        weapon = result.created.first
-        expect(weapon.ax_modifier1).to eq(1)
+        expect(weapon.ax_modifier1).to eq(ax_atk_modifier)
        expect(weapon.ax_strength1).to eq(7.0)
      end
@ -311,7 +334,7 @@ RSpec.describe WeaponImportService, type: :service do
        result = service.import
        weapon = result.created.first
-        expect(weapon.ax_modifier2).to eq(2)
+        expect(weapon.ax_modifier2).to eq(ax_hp_modifier)
        expect(weapon.ax_strength2).to eq(4.0)
      end
    end
@ -329,7 +352,7 @@ RSpec.describe WeaponImportService, type: :service do
                'augment_skill_info' => [
                  [
                    {
-                      'skill_id' => 3,
+                      'skill_id' => 1591,  # C.A. DMG modifier
                      'effect_value' => nil,
                      'show_value' => '5.5%'
                    }
@ -347,7 +370,7 @@ RSpec.describe WeaponImportService, type: :service do
        result = service.import
        weapon = result.created.first
-        expect(weapon.ax_modifier1).to eq(3)
+        expect(weapon.ax_modifier1).to eq(ax_ca_dmg_modifier)
        expect(weapon.ax_strength1).to eq(5.5)
      end
    end
`@ -1 +1 @@`
	`DataMigrate::Data.define(version: 20251214193836)`	`DataMigrate::Data.define(version: 20251230000002)`