refactor: remove skill system leftovers, migrate click mana to discipline perk

- Simplified getMeditationBonus() to continuous ramp formula
- Added click-mana capped perk to Mana Circulation discipline
- Removed manaWell/manaFlow/manaSpring skill reads and prestige upgrades
- Removed all skill fields from GameState and GameActionType
- Updated all call sites and tests (916 tests passing)

Closes #174

src/components/game/tabs/PrestigeTab.test.ts

@@ -28,9 +28,9 @@ describe('Tab barrel export', () => {
 // ─── Test: Prestige upgrade definitions ────────────────────────────────────────
 
 describe('Prestige upgrade definitions', () => {
-  it('has exactly 13 prestige upgrades', async () => {
+  it('has exactly 11 prestige upgrades', async () => {
     const { PRESTIGE_DEF } = await import('@/lib/game/constants/prestige');
-    expect(Object.keys(PRESTIGE_DEF).length).toBe(13);
+    expect(Object.keys(PRESTIGE_DEF).length).toBe(11);
   });
 
   it('all upgrades have required fields', async () => {
@@ -43,10 +43,10 @@ describe('Prestige upgrade definitions', () => {
     }
   });
 
-  it('all 14 expected upgrade IDs are present', async () => {
+  it('all 11 expected upgrade IDs are present', async () => {
     const { PRESTIGE_DEF } = await import('@/lib/game/constants/prestige');
     const expectedIds = [
-      'manaWell', 'manaFlow', 'insightAmp', 'spireKey',
+      'insightAmp', 'spireKey',
       'temporalEcho', 'steadyHand', 'ancientKnowledge', 'elementalAttune',
       'spellMemory', 'guardianPact', 'quickStart', 'elemStart',
       'unlockedManaTypeCapacity',

src/lib/game/__tests__/computed-stats.test.ts

@@ -162,12 +162,9 @@ describe('deductSpellCost', () => {
 });
 
 describe('computeMaxMana', () => {
-  it('should return base 100 with no skills or upgrades', () => {
+  it('should return base 100 with no upgrades', () => {
     const state = {
-      skills: {} as Record<string, number>,
       prestigeUpgrades: {},
-      skillUpgrades: {},
-      skillTiers: {},
     };
     const effects = { maxManaBonus: 0, maxManaMultiplier: 1 } as any;
     const result = computeMaxMana(state, effects);
@@ -176,10 +173,7 @@ describe('computeMaxMana', () => {
 
   it('should include manaWell prestige upgrade', () => {
     const state = {
-      skills: {} as Record<string, number>,
       prestigeUpgrades: { manaWell: 5 },
-      skillUpgrades: {},
-      skillTiers: {},
     };
     const effects = { maxManaBonus: 0, maxManaMultiplier: 1 } as any;
     const result = computeMaxMana(state, effects);
@@ -188,10 +182,7 @@ describe('computeMaxMana', () => {
 
   it('should apply multiplier from effects', () => {
     const state = {
-      skills: {} as Record<string, number>,
       prestigeUpgrades: {},
-      skillUpgrades: {},
-      skillTiers: {},
     };
     const effects = { maxManaBonus: 0, maxManaMultiplier: 1.5 } as any;
     const result = computeMaxMana(state, effects);
@@ -200,10 +191,7 @@ describe('computeMaxMana', () => {
 
   it('should apply bonus from effects', () => {
     const state = {
-      skills: {} as Record<string, number>,
       prestigeUpgrades: {},
-      skillUpgrades: {},
-      skillTiers: {},
     };
     const effects = { maxManaBonus: 50, maxManaMultiplier: 1 } as any;
     const result = computeMaxMana(state, effects);
@@ -212,43 +200,54 @@ describe('computeMaxMana', () => {
 });
 
 describe('computeRegen', () => {
-  it('should return base regen with no skills', () => {
+  it('should return base regen with no upgrades', () => {
     const state = {
-      skills: {} as Record<string, number>,
       prestigeUpgrades: {} as Record<string, number>,
-      skillUpgrades: {} as Record<string, string[]>,
-      skillTiers: {} as Record<string, number>,
       attunements: {} as Record<string, { active: boolean; level: number; experience: number }>,
     };
     const effects = { regenBonus: 0, regenMultiplier: 1, permanentRegenBonus: 0 } as any;
     const result = computeRegen(state as any, effects);
-    // Base regen is 2 (this test provides effects, so no attunement bonus)
     expect(result).toBe(2);
   });
 });
 
 describe('computeClickMana', () => {
-  it('should return base click mana with no skills', () => {
-    const state = {
-      skills: {} as Record<string, number>,
-    };
-    const discipline = { bonuses: {}, multipliers: {} };
-    const result = computeClickMana(state.skills, discipline);
-    expect(result).toBeGreaterThanOrEqual(1);
+  it('should return base click mana with no discipline', () => {
+    const result = computeClickMana();
+    expect(result).toBe(1);
+  });
+
+  it('should return click mana with discipline bonus', () => {
+    const discipline = { bonuses: { clickManaBonus: 3 }, multipliers: {} };
+    const result = computeClickMana(discipline);
+    expect(result).toBe(4);
   });
 });
 
 describe('getMeditationBonus', () => {
   it('should return 1.0 with zero ticks', () => {
-    const result = getMeditationBonus(0, {});
+    const result = getMeditationBonus(0);
     expect(result).toBe(1.0);
   });
 
   it('should increase with more ticks', () => {
-    const result1 = getMeditationBonus(10, {});
-    const result2 = getMeditationBonus(100, {});
+    const result1 = getMeditationBonus(10);
+    const result2 = getMeditationBonus(100);
     expect(result2).toBeGreaterThan(result1);
   });
+
+  it('should follow continuous ramp formula', () => {
+    // At 4 hours: 1 + (4/8)*4 = 3.0
+    const ticksFor4Hours = 4 / 0.04;
+    const result = getMeditationBonus(ticksFor4Hours);
+    expect(result).toBeCloseTo(3.0, 5);
+  });
+
+  it('should cap at 5.0', () => {
+    const ticksFor8Hours = 8 / 0.04;
+    const result = getMeditationBonus(ticksFor8Hours);
+    expect(result).toBeCloseTo(5.0, 5);
+  });
 });
 
 describe('getIncursionStrength', () => {

src/lib/game/__tests__/mana-utils.test.ts

@@ -12,25 +12,14 @@ import { HOURS_PER_TICK } from '../constants';
 
 describe('computeMaxMana', () => {
   const baseState = {
-    skills: {},
     prestigeUpgrades: {},
-    skillUpgrades: {},
-    skillTiers: {},
   };
 
-  it('should return base 100 with no skills or upgrades', () => {
+  it('should return base 100 with no upgrades', () => {
     const result = computeMaxMana(baseState);
     expect(result).toBe(100);
   });
 
-  it('should add 100 per manaWell skill level', () => {
-    const result = computeMaxMana({
-      ...baseState,
-      skills: { manaWell: 3 },
-    });
-    expect(result).toBe(100 + 3 * 100);
-  });
-
   it('should add 500 per manaWell prestige upgrade', () => {
     const result = computeMaxMana({
       ...baseState,
@@ -85,34 +74,15 @@ describe('computeMaxMana', () => {
 
 describe('computeRegen', () => {
   const baseState = {
-    skills: {},
     prestigeUpgrades: {},
-    skillUpgrades: {},
-    skillTiers: {},
     attunements: {},
   };
 
-  it('should return base regen of 2 with no skills', () => {
+  it('should return base regen of 2 with no upgrades', () => {
     const result = computeRegen(baseState);
     expect(result).toBe(2);
   });
 
-  it('should add 1 per manaFlow skill level', () => {
-    const result = computeRegen({
-      ...baseState,
-      skills: { manaFlow: 3 },
-    });
-    expect(result).toBe(5); // 2 + 3
-  });
-
-  it('should add 2 per manaSpring skill level', () => {
-    const result = computeRegen({
-      ...baseState,
-      skills: { manaSpring: 2 },
-    });
-    expect(result).toBe(6); // 2 + 4
-  });
-
   it('should add 0.5 per manaFlow prestige upgrade', () => {
     const result = computeRegen({
       ...baseState,
@@ -169,29 +139,14 @@ describe('computeRegen', () => {
 // ─── computeClickMana ─────────────────────────────────────────────────────────
 
 describe('computeClickMana', () => {
-  it('should return 1 with no skills', () => {
-    const result = computeClickMana({});
+  it('should return 1 with no discipline bonus', () => {
+    const result = computeClickMana();
     expect(result).toBe(1);
   });
 
-  it('should add 1 per manaTap skill level', () => {
-    const result = computeClickMana({ manaTap: 3 });
-    expect(result).toBe(4); // 1 + 3
-  });
-
-  it('should add 3 per manaSurge skill level', () => {
-    const result = computeClickMana({ manaSurge: 2 });
-    expect(result).toBe(7); // 1 + 6
-  });
-
-  it('should combine manaTap and manaSurge', () => {
-    const result = computeClickMana({ manaTap: 2, manaSurge: 1 });
-    expect(result).toBe(6); // 1 + 2 + 3
-  });
-
-  it('should add discipline click multiplier', () => {
-    const result = computeClickMana({}, {
-      bonuses: { clickManaMultiplier: 5 },
+  it('should add discipline click bonus', () => {
+    const result = computeClickMana({
+      bonuses: { clickManaBonus: 5 },
       multipliers: {},
     });
     expect(result).toBe(6);
@@ -202,72 +157,49 @@ describe('computeClickMana', () => {
 
 describe('getMeditationBonus', () => {
   it('should return 1.0 with zero ticks', () => {
-    expect(getMeditationBonus(0, {})).toBe(1.0);
+    expect(getMeditationBonus(0)).toBe(1.0);
   });
 
   it('should increase with more ticks', () => {
-    const low = getMeditationBonus(10, {});
-    const high = getMeditationBonus(100, {});
+    const low = getMeditationBonus(10);
+    const high = getMeditationBonus(100);
     expect(high).toBeGreaterThan(low);
   });
 
-  it('should cap at 1.5x without meditation skill', () => {
-    // After 4 hours: 1 + min(4/4, 0.5) = 1.5
-    const ticksFor4Hours = 4 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor4Hours, {});
-    expect(result).toBeCloseTo(1.5, 5);
+  it('should follow continuous ramp: 1 + (hours/8)*4', () => {
+    // At 2 hours: 1 + (2/8)*4 = 2.0
+    const ticksFor2Hours = 2 / HOURS_PER_TICK;
+    const result = getMeditationBonus(ticksFor2Hours);
+    expect(result).toBeCloseTo(2.0, 5);
   });
 
-  it('should reach 2.5x with meditation skill after 4 hours', () => {
-    const ticksFor4Hours = 4 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor4Hours, { meditation: 1 });
-    expect(result).toBeCloseTo(2.5, 5);
-  });
-
-  it('should reach 3.0x with deep trance after 6 hours', () => {
-    const ticksFor6Hours = 6 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor6Hours, {
-      meditation: 1,
-      deepTrance: 1,
-    });
-    expect(result).toBeCloseTo(3.0, 5);
-  });
-
-  it('should reach 5.0x with void meditation after 8 hours', () => {
+  it('should cap at 5.0 with no discipline bonus', () => {
+    // At 8+ hours: cap at 5.0
     const ticksFor8Hours = 8 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor8Hours, {
-      meditation: 1,
-      deepTrance: 1,
-      voidMeditation: 1,
-    });
+    const result = getMeditationBonus(ticksFor8Hours);
     expect(result).toBeCloseTo(5.0, 5);
   });
 
-  it('should reach cap at 2 hours (min(2/4, 0.5) = 0.5)', () => {
-    // At 2 hours: min(2/4, 0.5) = min(0.5, 0.5) = 0.5 → 1.5x
-    const ticksFor2Hours = 2 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor2Hours, {});
-    expect(result).toBeCloseTo(1.5, 5);
-  });
-
-  it('should be below cap at 1 hour', () => {
+  it('should ramp linearly: 1 hour → 1.5', () => {
     const ticksFor1Hour = 1 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor1Hour, {});
-    expect(result).toBeLessThan(1.5);
+    const result = getMeditationBonus(ticksFor1Hour);
+    expect(result).toBeCloseTo(1.5, 5);
   });
 
   it('should apply meditation efficiency multiplier', () => {
     const ticksFor4Hours = 4 / HOURS_PER_TICK;
-    const withoutEff = getMeditationBonus(ticksFor4Hours, {}, 1);
-    const withEff = getMeditationBonus(ticksFor4Hours, {}, 2);
+    const withoutEff = getMeditationBonus(ticksFor4Hours, 1);
+    const withEff = getMeditationBonus(ticksFor4Hours, 2);
     expect(withEff).toBeCloseTo(withoutEff * 2, 5);
   });
 
-  it('should ramp linearly before cap', () => {
-    // At 1 hour: 1 + min(1/4, 0.5) = 1 + 0.25 = 1.25
-    const ticksFor1Hour = 1 / HOURS_PER_TICK;
-    const result = getMeditationBonus(ticksFor1Hour, {});
-    expect(result).toBeCloseTo(1.25, 5);
+  it('should respect discipline meditation cap bonus', () => {
+    // With +3.5 discipline cap, max = 8.5
+    // Need more than 8 hours for the higher cap to matter
+    // At 16 hours without cap: 1 + (16/8)*4 = 9.0, capped to 8.5
+    const ticksFor16Hours = 16 / HOURS_PER_TICK;
+    const result = getMeditationBonus(ticksFor16Hours, 1, 3.5);
+    expect(result).toBeCloseTo(8.5, 5);
   });
 });
 
@@ -275,10 +207,7 @@ describe('getMeditationBonus', () => {
 
 describe('computeEffectiveRegenForDisplay', () => {
   const baseState = {
-    skills: {},
     prestigeUpgrades: {},
-    skillUpgrades: {},
-    skillTiers: {},
     attunements: {},
   };
 

src/lib/game/__tests__/store-actions-combat-prestige.test.ts

@@ -186,15 +186,16 @@ describe('PrestigeStore', () => {
 
   describe('doPrestige', () => {
     it('should purchase upgrade when affordable', () => {
-      const result = usePrestigeStore.getState().doPrestige('manaWell');
+      usePrestigeStore.setState({ insight: 2000 });
+      const result = usePrestigeStore.getState().doPrestige('insightAmp');
       expect(result.success).toBe(true);
-      expect(usePrestigeStore.getState().prestigeUpgrades.manaWell).toBe(1);
-      expect(usePrestigeStore.getState().insight).toBeLessThan(500);
+      expect(usePrestigeStore.getState().prestigeUpgrades.insightAmp).toBe(1);
+      expect(usePrestigeStore.getState().insight).toBeLessThan(2000);
     });
 
     it('should return false when cannot afford', () => {
       usePrestigeStore.setState({ insight: 0 });
-      const result = usePrestigeStore.getState().doPrestige('manaWell');
+      const result = usePrestigeStore.getState().doPrestige('insightAmp');
       expect(result.success).toBe(false);
       if (!result.success) {
         expect(result.code).toBe(ErrorCode.INSUFFICIENT_INSIGHT);
@@ -320,9 +321,9 @@ describe('PrestigeStore', () => {
 
   describe('resetPrestigeForNewLoop', () => {
     it('should preserve insight and upgrades, reset loop state', () => {
-      usePrestigeStore.getState().resetPrestigeForNewLoop(200, { manaWell: 2 });
+      usePrestigeStore.getState().resetPrestigeForNewLoop(200, { insightAmp: 2 });
       expect(usePrestigeStore.getState().insight).toBe(200);
-      expect(usePrestigeStore.getState().prestigeUpgrades).toEqual({ manaWell: 2 });
+      expect(usePrestigeStore.getState().prestigeUpgrades).toEqual({ insightAmp: 2 });
 
       expect(usePrestigeStore.getState().defeatedGuardians).toEqual([]);
     });
@@ -330,7 +331,7 @@ describe('PrestigeStore', () => {
 
   describe('resetPrestige', () => {
     it('should reset everything to initial state', () => {
-      usePrestigeStore.setState({ insight: 1000, loopCount: 5, prestigeUpgrades: { manaWell: 3 } });
+      usePrestigeStore.setState({ insight: 1000, loopCount: 5, prestigeUpgrades: { insightAmp: 3 } });
       usePrestigeStore.getState().resetPrestige();
       expect(usePrestigeStore.getState().insight).toBe(0);
       expect(usePrestigeStore.getState().loopCount).toBe(0);

src/lib/game/constants/core.ts

@@ -16,12 +16,11 @@ export const RARITY_COLORS: Record<string, string> = {
   mythic: '#EF4444',
 };
 
-// ─── Study Speed Formula ─────────────────────────────────────────────────────
-export function getStudySpeedMultiplier(skills: Record<string, number>): number {
-  return 1 + (skills.quickLearner || 0) * 0.1;
+// ─── Study Multipliers (skill system removed, always base value) ────────────
+export function getStudySpeedMultiplier(): number {
+  return 1;
 }
 
-// ─── Study Cost Formula ───────────────────────────────────────────────────────
-export function getStudyCostMultiplier(skills: Record<string, number>): number {
-  return 1 - (skills.focusedMind || 0) * 0.05;
+export function getStudyCostMultiplier(): number {
+  return 1;
 }

src/lib/game/constants/prestige.ts

@@ -2,8 +2,6 @@
 import type { PrestigeDef } from '../types';
 
 export const PRESTIGE_DEF: Record<string, PrestigeDef> = {
-  manaWell:     { name: "Mana Well",     desc: "+500 starting max mana",     max: 5,  cost: 500 },
-  manaFlow:     { name: "Mana Flow",     desc: "+0.5 regen/sec permanently", max: 10, cost: 750 },
   insightAmp:   { name: "Insight Amp",   desc: "+25% insight gain",          max: 4,  cost: 1500 },
   spireKey:     { name: "Spire Key",     desc: "Start at floor +2",          max: 5,  cost: 4000 },
   temporalEcho: { name: "Temporal Echo", desc: "+10% mana generation",       max: 5,  cost: 3000 },

src/lib/game/crafting-actions/design-actions.ts

@@ -9,8 +9,6 @@ import { hasSpecial, SPECIAL_EFFECTS } from '../effects/special-effects';
 
 export interface DesignActionsParams {
   skills: Record<string, number>;
-  skillUpgrades: Record<string, string[]>;
-  skillTiers: Record<string, number>;
 }
 
 export function startDesigningEnchantment(
@@ -33,14 +31,13 @@ export function startDesigningEnchantment(
   const equipType = CraftingUtils.getEquipmentType(equipmentTypeId);
   if (!equipType) return false;
 
-  const efficiencyBonus = ((params.skillUpgrades || {})['efficientEnchant'] || [])?.length * 0.05 || 0;
-  const totalCapacityCost = CraftingDesign.calculateDesignCapacityCost(effects, efficiencyBonus);
+  const totalCapacityCost = CraftingDesign.calculateDesignCapacityCost(effects, 0);
 
   if (totalCapacityCost > equipType.baseCapacity) {
     return false;
   }
 
-  const computedEffects = computeEffects(params.skillUpgrades || {}, params.skillTiers || {});
+  const computedEffects = computeEffects();
   const hasEnchantMastery = hasSpecial(computedEffects, SPECIAL_EFFECTS.ENCHANT_MASTERY);
 
   let updates: Partial<CraftingState> = {};

src/lib/game/data/disciplines/base.ts

@@ -61,10 +61,19 @@ export const baseDisciplines: DisciplineDefinition[] = [
         type: 'capped',
         threshold: 100,
         value: 100,
-        description: 'Every 100 XP: +0.5 max meditation cap (7 tiers, up to +3.5). Raises Void Meditation ceiling.',
+        description: 'Every 100 XP: +0.5 to meditation multiplier (7 tiers, up to +3.5). Adds directly to the meditation multiplier cap.',
         bonus: { stat: 'meditationCapBonus', amount: 0.5 },
         maxTier: 7,
       },
+      {
+        id: 'mana-circulation-click',
+        type: 'capped',
+        threshold: 500,
+        value: 500,
+        description: 'Every 500 XP: +1 mana per click (5 tiers, up to +5).',
+        bonus: { stat: 'clickManaBonus', amount: 1 },
+        maxTier: 5,
+      },
     ],
   },
   {

src/lib/game/effects.ts

@@ -88,12 +88,10 @@ export interface UnifiedEffects extends ComputedEffects {
 }
 
 export function computeAllEffects(
-  skillUpgrades: Record<string, string[]>,
-  skillTiers: Record<string, number>,
   equipmentInstances: Record<string, EquipmentInstance>,
   equippedInstances: Record<string, string | null>,
 ): UnifiedEffects {
-  const upgradeEffects = computeEffects(skillUpgrades, skillTiers);
+  const upgradeEffects = computeEffects();
   const equipmentEffects = computeEquipmentEffects(equipmentInstances, equippedInstances, upgradeEffects.enchantmentPowerMultiplier);
   const disciplineEffects = computeDisciplineEffects();
 
@@ -105,9 +103,6 @@ export function computeAllEffects(
     }
   }
 
-  // Per-element regen from discipline effects (regen_{element}) — no longer produced
-  // by elemental disciplines (they now use conversion instead).
-  // Kept for backward compatibility with any upgrade effects that may provide per-element regen.
   const perElementRegenBonus: Record<string, number> = { ...upgradeEffects.perElementRegenBonus };
 
   // Merge per-element cap bonuses from discipline effects (elementCap_{element})
@@ -158,14 +153,10 @@ export function computeAllEffects(
 }
 
 export function getUnifiedEffects(state: {
-  skillUpgrades?: Record<string, string[]>;
-  skillTiers?: Record<string, number>;
   equipmentInstances?: Record<string, EquipmentInstance>;
   equippedInstances?: Record<string, string | null>;
 }): UnifiedEffects {
   return computeAllEffects(
-    state.skillUpgrades || {},
-    state.skillTiers || {},
     state.equipmentInstances || {},
     state.equippedInstances || {},
   );
@@ -175,28 +166,21 @@ export function getUnifiedEffects(state: {
 
 export function computeTotalMaxMana(
   state: {
-    skills?: Record<string, number>;
     prestigeUpgrades?: Record<string, number>;
-    skillUpgrades?: Record<string, string[]>;
-    skillTiers?: Record<string, number>;
     equipmentInstances?: Record<string, EquipmentInstance>;
     equippedInstances?: Record<string, string | null>;
   },
   effects?: UnifiedEffects
 ): number {
   const pu = state.prestigeUpgrades;
-  const skillMult = effects?.skillLevelMultiplier || 1;
-  const base = 100 + ((state.skills || {}).manaWell || 0) * 100 * skillMult + ((pu || {}).manaWell || 0) * 500;
+  const base = 100 + ((pu || {}).manaWell || 0) * 500;
   const resolvedEffects = effects || getUnifiedEffects(state);
   return Math.floor((base + resolvedEffects.maxManaBonus) * resolvedEffects.maxManaMultiplier);
 }
 
 export function computeTotalRegen(
   state: {
-    skills?: Record<string, number>;
     prestigeUpgrades?: Record<string, number>;
-    skillUpgrades?: Record<string, string[]>;
-    skillTiers?: Record<string, number>;
     equipmentInstances?: Record<string, EquipmentInstance>;
     equippedInstances?: Record<string, string | null>;
   },
@@ -204,8 +188,7 @@ export function computeTotalRegen(
 ): number {
   const pu = state.prestigeUpgrades;
   const temporalBonus = 1 + ((pu?.temporalEcho || 0)) * 0.1;
-  const skillMult = effects?.skillLevelMultiplier || 1;
-  const base = 2 + (state.skills?.manaFlow || 0) * 1 * skillMult + (state.skills?.manaSpring || 0) * 2 * skillMult + (pu?.manaFlow || 0) * 0.5;
+  const base = 2 + (pu?.manaFlow || 0) * 0.5;
   let regen = base * temporalBonus;
   const resolvedEffects = effects || getUnifiedEffects(state);
   regen = (regen + resolvedEffects.regenBonus + resolvedEffects.permanentRegenBonus) * resolvedEffects.regenMultiplier;
@@ -214,16 +197,12 @@ export function computeTotalRegen(
 
 export function computeTotalClickMana(
   state: {
-    skills?: Record<string, number>;
-    skillUpgrades?: Record<string, string[]>;
-    skillTiers?: Record<string, number>;
     equipmentInstances?: Record<string, EquipmentInstance>;
     equippedInstances?: Record<string, string | null>;
   },
   effects?: UnifiedEffects
 ): number {
-  const skillMult = effects?.skillLevelMultiplier || 1;
-  const base = 1 + (state.skills?.manaTap || 0) * 1 * skillMult + (state.skills?.manaSurge || 0) * 3 * skillMult;
+  const base = 1;
   const resolvedEffects = effects || getUnifiedEffects(state);
   return Math.floor((base + resolvedEffects.clickManaBonus) * resolvedEffects.clickManaMultiplier);
 }

src/lib/game/effects/upgrade-effects.ts

@@ -18,10 +18,7 @@ function _buildUpgradeCache(): void {
  * Get all selected upgrades with their full effect definitions.
  * Since skills are removed, always returns empty array.
  */
-export function getActiveUpgrades(
-  _skillUpgrades: Record<string, string[]>,
-  _skillTiers: Record<string, number>
-): ActiveUpgradeEffect[] {
+export function getActiveUpgrades(): ActiveUpgradeEffect[] {
   return [];
 }
 
@@ -29,10 +26,7 @@ export function getActiveUpgrades(
  * Compute all active effects from selected upgrades.
  * Since skills are removed, returns base values with no upgrades applied.
  */
-export function computeEffects(
-  _skillUpgrades: Record<string, string[]>,
-  _skillTiers: Record<string, number>
-): ComputedEffects {
+export function computeEffects(): ComputedEffects {
   return {
     maxManaMultiplier: 1,
     maxManaBonus: 0,

src/lib/game/hooks/useGameDerived.ts

@@ -39,17 +39,17 @@ export function useManaStats() {
   );
 
   const maxMana = useMemo(
-    () => computeMaxMana({ skills: {}, prestigeUpgrades, skillUpgrades: {}, skillTiers: {} }, upgradeEffects),
+    () => computeMaxMana({ prestigeUpgrades }, upgradeEffects),
     [prestigeUpgrades, upgradeEffects]
   );
 
   const baseRegen = useMemo(
-    () => computeRegen({ skills: {} as Record<string, number>, prestigeUpgrades, attunements: {} } as any, upgradeEffects),
+    () => computeRegen({ prestigeUpgrades, attunements: {} } as any, upgradeEffects),
     [prestigeUpgrades, upgradeEffects]
   );
 
   const clickMana = useMemo(
-    () => computeClickMana({}),
+    () => computeClickMana(),
     []
   );
 
@@ -157,7 +157,7 @@ export function useCombatStats() {
     const attackSpeedMult = upgradeEffects.attackSpeedMultiplier;
     const totalCastSpeed = spellCastSpeed * quickCastBonus * attackSpeedMult;
 
-    const damagePerCast = calcDamage({ skills: {}, signedPacts }, activeSpell, floorElem);
+    const damagePerCast = calcDamage({ signedPacts }, activeSpell, floorElem);
     const castsPerSecond = totalCastSpeed * HOURS_PER_TICK / (TICK_MS / 1000);
 
     return damagePerCast * castsPerSecond;
@@ -195,7 +195,7 @@ export function useCombatStats() {
       precisionChance,
       elemBonus,
       elemBonusText,
-      total: calcDamage({ skills: {}, signedPacts }, activeSpell, floorElem),
+      total: calcDamage({ signedPacts }, activeSpell, floorElem),
     };
   }, [activeSpellDef, signedPacts, activeSpell, floorElem, isGuardianFloor, pactMultiplier]);
 
@@ -217,17 +217,17 @@ export function useCombatStats() {
  */
 export function useStudyStats() {
   const studySpeedMult = useMemo(
-    () => getStudySpeedMultiplier({}),
+    () => getStudySpeedMultiplier(),
     []
   );
 
   const studyCostMult = useMemo(
-    () => getStudyCostMultiplier({}),
+    () => getStudyCostMultiplier(),
     []
   );
 
   const upgradeEffects = useMemo(
-    () => computeEffects({}, {}),
+    () => computeEffects(),
     []
   );
 

src/lib/game/stores/combat-actions.ts

@@ -96,7 +96,7 @@ export function processCombatTick(
       // Calculate base damage
       const floorElement = getFloorElement(currentFloor);
       const damage = calcDamage(
-        { skills: {}, signedPacts },
+        { signedPacts },
         spellId,
         floorElement,
         disciplineEffects,
@@ -151,7 +151,7 @@ export function processCombatTick(
         // Calculate damage
         const eFloorElement = getFloorElement(currentFloor);
         const eDamage = calcDamage(
-          { skills: {}, signedPacts },
+          { signedPacts },
           eSpell.spellId,
           eFloorElement,
           disciplineEffects,

src/lib/game/stores/gameActions.ts

@@ -30,7 +30,7 @@ export const createResetGame = (set: (state: Partial<GameCoordinatorState>) => v
 
   useUIStore.getState().reset();
   usePrestigeStore.getState().resetPrestige();
-  useManaStore.getState().resetMana({}, {}, {}, {});
+  useManaStore.getState().resetMana({});
   useCombatStore.getState().resetCombat(startFloor);
 
   set({
@@ -43,19 +43,11 @@ export const createGatherMana = () => () => {
   const prestigeState = usePrestigeStore.getState();
   const disciplineEffects = computeDisciplineEffects();
 
-  // Compute click mana with discipline bonuses (mana-channeling → clickManaMultiplier)
-  const cm = computeClickMana(
-    {},
-    disciplineEffects,
-  );
+  // Compute click mana with discipline bonuses
+  const cm = computeClickMana(disciplineEffects);
 
   const max = computeMaxMana(
-    {
-      skills: {},
-      prestigeUpgrades: prestigeState.prestigeUpgrades,
-      skillUpgrades: {},
-      skillTiers: {}
-    },
+    { prestigeUpgrades: prestigeState.prestigeUpgrades },
     undefined,
     disciplineEffects,
   );

src/lib/game/stores/gameHooks.ts

@@ -33,8 +33,6 @@ export function useUnifiedEffects() {
 
   return {
     ...getUnifiedEffects({
-      skillUpgrades: {},
-      skillTiers: {},
       equippedInstances,
       equipmentInstances,
     }),
@@ -55,27 +53,25 @@ export function useManaStats() {
   const disciplineEffects = computeDisciplineEffects();
 
   const upgradeEffects = getUnifiedEffects({
-    skillUpgrades: {},
-    skillTiers: {},
     equippedInstances,
     equipmentInstances,
   });
 
   const maxMana = computeMaxMana(
-    { skills: {}, prestigeUpgrades, skillUpgrades: {}, skillTiers: {} },
+    { prestigeUpgrades },
     upgradeEffects,
     disciplineEffects,
   );
 
   const baseRegen = computeRegen(
-    { skills: {}, prestigeUpgrades, skillUpgrades: {}, skillTiers: {}, attunements: {} },
+    { prestigeUpgrades, attunements: {} },
     upgradeEffects,
     disciplineEffects,
   );
 
-  const clickMana = computeClickMana({}, disciplineEffects);
+  const clickMana = computeClickMana(disciplineEffects);
 
-  const meditationMultiplier = getMeditationBonus(meditateTicks, {}, upgradeEffects.meditationEfficiency, disciplineEffects.meditationCapBonus);
+  const meditationMultiplier = getMeditationBonus(meditateTicks, upgradeEffects.meditationEfficiency, disciplineEffects.meditationCapBonus);
   const incursionStrength = getIncursionStrength(day, hour);
   const effectiveRegenWithSpecials = baseRegen * (1 - incursionStrength);
 
@@ -113,8 +109,6 @@ export function useCombatStats() {
   const equipmentInstances = useCraftingStore((s) => s.equipmentInstances);
 
   const upgradeEffects = getUnifiedEffects({
-    skillUpgrades: {},
-    skillTiers: {},
     equippedInstances,
     equipmentInstances,
   });

src/lib/game/stores/gameLoopActions.ts

@@ -19,7 +19,6 @@ export const createStartNewLoop = (set: (state: Partial<GameCoordinatorState>) =
     totalManaGathered: manaState.totalManaGathered,
     signedPacts: prestigeState.signedPacts,
     prestigeUpgrades: prestigeState.prestigeUpgrades,
-    skills: {},
   }, disciplineEffects);
 
   const total = prestigeState.insight + insightGained;
@@ -41,7 +40,7 @@ export const createStartNewLoop = (set: (state: Partial<GameCoordinatorState>) =
   );
   usePrestigeStore.getState().incrementLoopCount();
 
-  useManaStore.getState().resetMana(pu, {}, {}, {});
+  useManaStore.getState().resetMana(pu);
 
   // Reset combat with starting floor and any spells from prestige upgrades
   const startSpells = makeInitialSpells();

src/lib/game/stores/gameStore.ts

@@ -105,12 +105,12 @@ export const useGameStore = create<GameCoordinatorStore>()(
           const effects = { specials: allSpecials } as ComputedEffects;
 
           const maxMana = computeMaxMana(
-            { skills: {}, prestigeUpgrades: ctx.prestige.prestigeUpgrades, skillUpgrades: {}, skillTiers: {} },
+            { prestigeUpgrades: ctx.prestige.prestigeUpgrades },
             undefined,
             disciplineEffects,
           );
           const baseRegen = computeRegen(
-            { skills: {}, prestigeUpgrades: ctx.prestige.prestigeUpgrades, skillUpgrades: {}, skillTiers: {}, attunements: {} },
+            { prestigeUpgrades: ctx.prestige.prestigeUpgrades, attunements: {} },
             undefined,
             disciplineEffects,
           ) * (1 + (disciplineEffects.multipliers.regenMultiplier || 0));
@@ -129,7 +129,6 @@ export const useGameStore = create<GameCoordinatorStore>()(
             totalManaGathered: ctx.mana.totalManaGathered,
             signedPacts: ctx.prestige.signedPacts,
             prestigeUpgrades: ctx.prestige.prestigeUpgrades,
-            skills: {} as Record<string, number>,
           };
 
           // Check for loop end
@@ -163,7 +162,7 @@ export const useGameStore = create<GameCoordinatorStore>()(
 
           if (ctx.combat.currentAction === 'meditate') {
             meditateTicks++;
-            meditationMultiplier = getMeditationBonus(meditateTicks, {}, 1, disciplineEffects.meditationCapBonus);
+            meditationMultiplier = getMeditationBonus(meditateTicks, 1, disciplineEffects.meditationCapBonus);
           } else {
             meditateTicks = 0;
           }

src/lib/game/stores/manaStore.ts

@@ -45,9 +45,6 @@ export interface ManaActions {
   // Reset
   resetMana: (
     prestigeUpgrades: Record<string, number>,
-    skills?: Record<string, number>,
-    skillUpgrades?: Record<string, string[]>,
-    skillTiers?: Record<string, number>
   ) => void;
 }
 
@@ -193,9 +190,6 @@ export const useManaStore = create<ManaStore>()(
 
       resetMana: (
         prestigeUpgrades: Record<string, number>,
-        _skills: Record<string, number> = {},
-        _skillUpgrades: Record<string, string[]> = {},
-        _skillTiers: Record<string, number> = {}
       ) => {
         const elementMax = 10 + (prestigeUpgrades.elemMax || 0) * 5;
         const startingMana = 10 + (prestigeUpgrades.manaStart || 0) * 10;

src/lib/game/types/game.ts

@@ -166,12 +166,6 @@ export interface GameState {
   // Spells
   spells: Record<string, SpellState>;
 
-  // Skills
-  skills: Record<string, number>;
-  skillProgress: Record<string, number>;  // Saved study progress for skills
-  skillUpgrades: Record<string, string[]>; // Selected upgrade IDs per skill
-  skillTiers: Record<string, number>;      // Current tier for each base skill
-
   // Equipment System (new instance-based system)
   equippedInstances: Record<string, string | null>;  // slot -> instanceId
   equipmentInstances: Record<string, EquipmentInstance>;  // instanceId -> instance
@@ -290,7 +284,6 @@ export type GameActionType =
   | { type: 'SET_ACTION'; action: GameAction }
   | { type: 'SET_SPELL'; spellId: string }
   | { type: 'LEARN_SPELL'; spellId: string }
-  | { type: 'START_STUDYING_SKILL'; skillId: string }
   | { type: 'START_STUDYING_SPELL'; spellId: string }
   | { type: 'CANCEL_STUDY' }
   | { type: 'CONVERT_MANA'; element: string; amount: number }
@@ -299,6 +292,5 @@ export type GameActionType =
   | { type: 'DO_PRESTIGE'; id: string }
   | { type: 'START_NEW_LOOP' }
   | { type: 'TOGGLE_PAUSE' }
-  | { type: 'RESET_GAME' }
-  | { type: 'SELECT_SKILL_UPGRADE'; skillId: string; upgradeId: string }
-  | { type: 'TIER_UP_SKILL'; skillId: string };
+  | { type: 'RESET_GAME' };
+

src/lib/game/utils/combat-utils.ts

@@ -10,7 +10,6 @@ import { BASE_GUARDIANS } from '../data/guardian-data';
 // ─── Damage Calculation Params ──────────────────────────────────────────────
 
 export interface DamageCalcParams {
-  skills: Record<string, number>;
   signedPacts: number[];
 }
 
@@ -21,13 +20,11 @@ export interface InsightCalcParams {
   totalManaGathered: number;
   signedPacts: number[];
   prestigeUpgrades: Record<string, number>;
-  skills: Record<string, number>;
 }
 
 // ─── DPS Calculation Params ─────────────────────────────────────────────────
 
 export interface DPSCalcParams {
-  skills: Record<string, number>;
   signedPacts: number[];
   equippedInstances: Record<string, string | null>;
   equipmentInstances: Record<string, EquipmentInstance>;
@@ -150,24 +147,21 @@ export function calcDamage(
 ): number {
   const sp = SPELLS_DEF[spellId];
   if (!sp) return 5;
-  const skills = state.skills;
 
-  // Base damage: spell base + skill bonus + discipline bonus
+  // Base damage: spell base + discipline bonus
   const discBaseDmg = discipline?.bonuses?.baseDamageBonus || 0;
-  const baseDmg = sp.dmg + (skills.combatTrain || 0) * 5 + discBaseDmg;
+  const baseDmg = sp.dmg + discBaseDmg;
 
   // Percentage multiplier
   const discDmgMult = discipline?.bonuses?.baseDamageMultiplier || 0;
-  const pct = 1 + (skills.arcaneFury || 0) * 0.1 + discDmgMult;
+  const pct = 1 + discDmgMult;
 
   // Elemental mastery bonus
-  const elemMasteryBonus = 1 + (skills.elementalMastery || 0) * 0.15;
+  const elemMasteryBonus = 1;
 
   // Guardian bane bonus
   const isGuardianFloor = floorElem && Object.values(BASE_GUARDIANS).some(g => g.element === floorElem);
-  const guardianBonus = isGuardianFloor
-    ? 1 + (skills.guardianBane || 0) * 0.2
-    : 1;
+  const guardianBonus = 1;
 
   // Get boon bonuses from pacts
   const boons = getBoonBonuses(state.signedPacts);
@@ -177,7 +171,7 @@ export function calcDamage(
   const elemDamageMult = 1 + boons.elementalDamage / 100;
 
   // Apply crit chance and damage from boons
-  const critChance = (skills.precision || 0) * 0.05 + boons.critChance / 100;
+  const critChance = boons.critChance / 100;
   const critDamageMult = 1.5 + boons.critDamage / 100;
 
   let damage = baseDmg * pct * elemMasteryBonus * guardianBonus * rawDamageMult * elemDamageMult;
@@ -200,7 +194,7 @@ export function calcDamage(
 export function calcInsight(state: InsightCalcParams, discipline?: DisciplineBonuses): number {
   const pu = state.prestigeUpgrades;
   const discInsightBonus = discipline?.bonuses?.insightGainBonus || 0;
-  const skillBonus = 1 + (state.skills.insightHarvest || 0) * 0.1 + discInsightBonus;
+  const skillBonus = 1 + discInsightBonus;
 
   // Get boon bonuses for insight gain
   const boons = getBoonBonuses(state.signedPacts);
@@ -323,7 +317,7 @@ export function getTotalDPS(
 
     // Get cast speed (spells per second)
     const baseCastTime = spellDef.baseCastTime || 1.0;
-    const castingSpeedBonus = 1 + (state.skills.castingSpeed || 0) * 0.1;
+    const castingSpeedBonus = 1;
     const equipmentAttackSpeed = upgradeEffects.attackSpeedMultiplier || 1;
     const castTime = baseCastTime / (castingSpeedBonus * equipmentAttackSpeed);
 

src/lib/game/utils/mana-utils.ts

@@ -13,10 +13,7 @@ export interface DisciplineBonuses {
 // ─── Mana Params ────────────────────────────────────────────────────────────
 
 export interface ManaComputeParams {
-  skills?: Record<string, number>;
   prestigeUpgrades?: Record<string, number>;
-  skillUpgrades?: Record<string, string[]>;
-  skillTiers?: Record<string, number>;
 }
 
 export interface RegenComputeParams extends ManaComputeParams {
@@ -38,7 +35,6 @@ export function computeMaxMana(
   const pu = state.prestigeUpgrades || {};
   const base =
     100 +
-    ((state.skills || {}).manaWell || 0) * 100 +
     (pu.manaWell || 0) * 500 +
     (discipline?.bonuses?.maxManaBonus || 0);
 
@@ -51,7 +47,7 @@ export function computeMaxMana(
 // ─── Regen ────────────────────────────────────────────────────────────────────
 
 export function computeRegen(
-  state: Pick<RegenComputeParams, 'skills' | 'prestigeUpgrades' | 'attunements'> & Partial<Pick<RegenComputeParams, 'skillUpgrades' | 'skillTiers'>>,
+  state: Pick<RegenComputeParams, 'prestigeUpgrades' | 'attunements'>,
   effects?: ComputedEffects,
   discipline?: DisciplineBonuses,
 ): number {
@@ -59,8 +55,6 @@ export function computeRegen(
   const temporalBonus = 1 + (pu.temporalEcho || 0) * 0.1;
   const base =
     2 +
-    ((state.skills || {}).manaFlow || 0) * 1 +
-    ((state.skills || {}).manaSpring || 0) * 2 +
     ((pu || {}).manaFlow || 0) * 0.5;
 
   let regen = base * temporalBonus;
@@ -85,7 +79,7 @@ export function computeRegen(
 // ─── Effective Regen for Display ──────────────────────────────────────────────
 
 export function computeEffectiveRegenForDisplay(
-  state: Pick<RegenComputeParams, 'skills' | 'prestigeUpgrades' | 'attunements'>,
+  state: Pick<RegenComputeParams, 'prestigeUpgrades' | 'attunements'>,
   effects?: ComputedEffects,
   discipline?: DisciplineBonuses,
 ): { rawRegen: number; conversionDrain: number; effectiveRegen: number } {
@@ -99,7 +93,7 @@ export function computeEffectiveRegenForDisplay(
 // ─── Effective Regen (dynamic) ────────────────────────────────────────────────
 
 export function computeEffectiveRegen(
-  state: Pick<RegenComputeParams, 'skills' | 'prestigeUpgrades' | 'attunements'> & { rawMana: number; incursionStrength: number },
+  state: Pick<RegenComputeParams, 'prestigeUpgrades' | 'attunements'> & { rawMana: number; incursionStrength: number },
   effects?: ComputedEffects,
   discipline?: DisciplineBonuses,
 ): number {
@@ -112,56 +106,25 @@ export function computeEffectiveRegen(
 // ─── Click Mana ───────────────────────────────────────────────────────────────
 
 export function computeClickMana(
-  skills: Record<string, number>,
   discipline?: DisciplineBonuses,
 ): number {
-  const skillTap = (skills.manaTap || 0) * 1;
-  const skillSurge = (skills.manaSurge || 0) * 3;
-  const discClickMult = discipline?.bonuses?.clickManaMultiplier || 0;
-
-  return 1 + skillTap + skillSurge + discClickMult;
+  const discClickBonus = discipline?.bonuses?.clickManaBonus || 0;
+  return 1 + discClickBonus;
 }
 
 // ─── Meditation Bonus ─────────────────────────────────────────────────────────
 
 export function getMeditationBonus(
   meditateTicks: number,
-  skills: Record<string, number>,
   meditationEfficiency: number = 1,
   disciplineMeditationCap: number = 0,
 ): number {
-  const hasMeditation = skills.meditation === 1;
-  const hasDeepTrance = skills.deepTrance === 1;
-  const hasVoidMeditation = skills.voidMeditation === 1;
-
   const hours = meditateTicks * HOURS_PER_TICK;
 
-  // Determine the hard cap for this meditation session.
-  // disciplineMeditationCap adds +0.5 per point (e.g. from Mana Circulation discipline).
-  // Base max is 5.0 (Void Meditation), each discipline bonus adds +0.5.
+  // Continuous ramp: 1 + (hours / 8) * 4, capped at 5.0 + disciplineMeditationCap
   const maxMultiplier = 5.0 + disciplineMeditationCap;
-
-  // Base meditation: ramps up over 4 hours, capped at 1.5x or discipline cap
-  let bonus = 1 + Math.min(hours / 4, 0.5);
-  bonus = Math.min(bonus, maxMultiplier);
-
-  // With Meditation Focus: up to 2.5x after 4 hours
-  if (hasMeditation && hours >= 4) {
-    bonus = Math.min(2.5, maxMultiplier);
-  }
-
-  // With Deep Trance: up to 3.0x after 6 hours
-  if (hasDeepTrance && hours >= 6) {
-    bonus = Math.min(3.0, maxMultiplier);
-  }
-
-  // With Void Meditation: up to maxMultiplier after 8 hours
-  if (hasVoidMeditation && hours >= 8) {
-    bonus = maxMultiplier;
-  }
+  const bonus = Math.min(1 + (hours / 8) * 4, maxMultiplier);
 
   // Apply meditation efficiency from upgrades
-  bonus *= meditationEfficiency;
-
-  return bonus;
+  return bonus * meditationEfficiency;
 }