diff --git a/apps/admin/src/app/(admin)/page.tsx b/apps/admin/src/app/(admin)/page.tsx
index 00df8c2..03070b5 100644
--- a/apps/admin/src/app/(admin)/page.tsx
+++ b/apps/admin/src/app/(admin)/page.tsx
@@ -22,11 +22,12 @@ export default async function AdminOverviewPage(): Promise<React.ReactElement> {
     }
   }
 
+  const krw = new Intl.NumberFormat('ko-KR', { style: 'currency', currency: 'KRW', maximumFractionDigits: 0 })
   const revenueCards = revenue
     ? [
         {
           title: 'Annual Recurring Revenue',
-          value: `$${revenue.arrUsd.toLocaleString()}`,
+          value: krw.format(revenue.arrKrw),
           subtext: 'Active subscriptions × 12 months',
           color: 'green' as const,
           badge: 'ARR',
@@ -34,7 +35,7 @@ export default async function AdminOverviewPage(): Promise<React.ReactElement> {
         },
         {
           title: 'Monthly Recurring Revenue',
-          value: `$${revenue.mrrUsd.toLocaleString()}`,
+          value: krw.format(revenue.mrrKrw),
           subtext: `Pro ${revenue.tierBreakdown.pro.toLocaleString()} · Pro+ ${revenue.tierBreakdown.pro_plus.toLocaleString()}`,
           color: 'blue' as const,
           badge: 'MRR',
@@ -208,7 +209,7 @@ export default async function AdminOverviewPage(): Promise<React.ReactElement> {
               >
                 <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start', mb: 2 }}>
                   <StatRing color={card.color} size={46}>
-                    <Typography sx={{ fontFamily: FONT_MONO, fontSize: '13px', fontWeight: 500 }}>$</Typography>
+                    <Typography sx={{ fontFamily: FONT_MONO, fontSize: '13px', fontWeight: 500 }}>₩</Typography>
                   </StatRing>
                   <Box component="span" sx={statusBadgeSx(card.badgeColor)}>
                     {card.badge}
diff --git a/apps/admin/src/app/(admin)/releases/page.tsx b/apps/admin/src/app/(admin)/releases/page.tsx
index f377684..500d4bb 100644
--- a/apps/admin/src/app/(admin)/releases/page.tsx
+++ b/apps/admin/src/app/(admin)/releases/page.tsx
@@ -3,6 +3,7 @@
 
 import { Box, Typography, Button } from '@mui/material'
 import { DoubleBezelCard, TactileBadge } from '@d3ro/ui/components/ds'
+import { SITE_URLS } from '@d3ro/core/web-urls'
 import { C, FONT_SANS, FONT_MONO, panelSx, tableSx, statusBadgeSx } from '@/lib/console-theme'
 import { requireManager } from '@/lib/admin-guard'
 import { fetchReleaseHub, type ReleaseAssetPlatform, type ReleaseHub } from '@/lib/forgejo-releases'
@@ -107,7 +108,7 @@ function HeaderBar({ feedLive, repoHtmlUrl }: { feedLive: boolean; repoHtmlUrl:
           Forgejo Releases ↗
         </Button>
         <Button
-          href="https://d3ro.chanpaca.net/download.html"
+          href={SITE_URLS.download}
           target="_blank"
           variant="outlined"
           sx={{
diff --git a/apps/admin/src/components/license-issuer-dialog.tsx b/apps/admin/src/components/license-issuer-dialog.tsx
index a891693..14031ae 100644
--- a/apps/admin/src/components/license-issuer-dialog.tsx
+++ b/apps/admin/src/components/license-issuer-dialog.tsx
@@ -20,9 +20,12 @@ import {
   Alert
 } from '@mui/material'
 import type { LicenseTier } from '@d3ro/core/types'
+import { PLAN_PRICE_KRW } from '@d3ro/core/plan-catalog'
 import { d3roPalette, d3roFontMono, d3roRadius } from '@d3ro/ui/theme'
 import { C, FONT_SANS, FONT_MONO, primaryButtonSx } from '@/lib/console-theme'
 
+const krw = new Intl.NumberFormat('ko-KR', { style: 'currency', currency: 'KRW', maximumFractionDigits: 0 })
+
 interface LicenseIssuerDialogProps {
   open: boolean
   onClose: () => void
@@ -150,9 +153,9 @@ export function LicenseIssuerDialog({ open, onClose }: LicenseIssuerDialogProps)
           <FormControl fullWidth sx={inputSx}>
             <InputLabel>Plan / Tier</InputLabel>
             <Select value={tier} onChange={(e) => setTier(e.target.value as LicenseTier)} label="Plan / Tier">
-              <MenuItem value="pro">Pro ($9.9 / ₩12,900)</MenuItem>
-              <MenuItem value="pro_plus">Pro+ ($19.9 / ₩24,900)</MenuItem>
-              <MenuItem value="team">Team ($25 / ₩32,000)</MenuItem>
+              <MenuItem value="pro">Pro ({krw.format(PLAN_PRICE_KRW.pro)} / month)</MenuItem>
+              <MenuItem value="pro_plus">Pro+ ({krw.format(PLAN_PRICE_KRW.pro_plus)} / month)</MenuItem>
+              <MenuItem value="team">Team</MenuItem>
               <MenuItem value="enterprise">Enterprise (Custom)</MenuItem>
             </Select>
           </FormControl>
diff --git a/apps/admin/src/lib/subscription-metrics.ts b/apps/admin/src/lib/subscription-metrics.ts
index 53d8124..2c2ec60 100644
--- a/apps/admin/src/lib/subscription-metrics.ts
+++ b/apps/admin/src/lib/subscription-metrics.ts
@@ -1,17 +1,12 @@
 import 'server-only'
 
+import { PLAN_PRICE_KRW } from '@d3ro/core/plan-catalog'
 import { getSupabaseAdminClient } from './supabase-admin'
 
-/** Monthly list price per tier, in USD. */
-const TIER_MONTHLY_USD: Record<'pro' | 'pro_plus' | 'free', number> = {
-  pro: 9.9,
-  pro_plus: 19.9,
-  free: 0,
-}
-
 export interface SubscriptionRevenue {
-  mrrUsd: number
-  arrUsd: number
+  /** Monthly list-price revenue in KRW (PLAN_PRICE_KRW; provider currency is not tracked per row). */
+  mrrKrw: number
+  arrKrw: number
   activeCount: number
   tierBreakdown: { pro: number; pro_plus: number; free: number }
 }
@@ -19,7 +14,7 @@ export interface SubscriptionRevenue {
 /**
  * Aggregates real subscription revenue from Supabase.
  * Only status === 'active' subscriptions contribute to MRR/ARR.
- * MRR = Σ(monthly price of each active subscription's tier); ARR = MRR * 12.
+ * MRR = Σ(PLAN_PRICE_KRW of each active subscription's tier); ARR = MRR * 12.
  */
 export async function fetchSubscriptionRevenue(): Promise<SubscriptionRevenue> {
   const supabase = await getSupabaseAdminClient('manager')
@@ -37,7 +32,7 @@ export async function fetchSubscriptionRevenue(): Promise<SubscriptionRevenue> {
   }
 
   const tierBreakdown = { pro: 0, pro_plus: 0, free: 0 }
-  let mrrUsd = 0
+  let mrrKrw = 0
   let activeCount = 0
 
   for (const row of rows) {
@@ -46,12 +41,9 @@ export async function fetchSubscriptionRevenue(): Promise<SubscriptionRevenue> {
     const tier = row.tier
     if (tier === 'pro' || tier === 'pro_plus' || tier === 'free') {
       tierBreakdown[tier] += 1
-      mrrUsd += TIER_MONTHLY_USD[tier]
+      mrrKrw += PLAN_PRICE_KRW[tier]
     }
   }
 
-  mrrUsd = Math.round(mrrUsd * 100) / 100
-  const arrUsd = Math.round(mrrUsd * 12 * 100) / 100
-
-  return { mrrUsd, arrUsd, activeCount, tierBreakdown }
+  return { mrrKrw, arrKrw: mrrKrw * 12, activeCount, tierBreakdown }
 }
diff --git a/apps/desktop/src/main/services/LicenseService.ts b/apps/desktop/src/main/services/LicenseService.ts
index 9283e21..608aad9 100644
--- a/apps/desktop/src/main/services/LicenseService.ts
+++ b/apps/desktop/src/main/services/LicenseService.ts
@@ -20,6 +20,7 @@ import type {
 } from '@d3ro/core/types'
 import { Feature } from '@d3ro/core/types'
 import { normalizeEntitlementTier } from '@d3ro/core/entitlement'
+import { PLAN_QUOTA } from '@d3ro/core/plan-catalog'
 import { verifySignedLicenseKey, createDefaultTrialPayload } from '@d3ro/core/utils/crypto-license'
 
 const logger = getLogger('license')
@@ -56,20 +57,22 @@ function generateMachineId(): string {
 // 클라이언트에서는 PREMIUM_LLM feature로 묶어서 canUse() 체크하고,
 // 실제 모델별 세분화는 서버 llm-proxy가 담당.
 // 여기의 값은 Settings UI 표시용 + upgrade 유도 시점 판단용.
-const QUOTA_LIMITS: Record<LicenseTier, Partial<Record<Feature, number>>> = {
-  free: {
-    // Haiku만, 250/주간. 클라이언트에서는 대략적 일환산(~36/일)으로 표시.
-    [Feature.PREMIUM_LLM]: 250,
-  },
-  pro: {
-    // 모델별: Haiku 1500 + Sonnet 300 + Opus 50 = 합산 표시
-    [Feature.PREMIUM_LLM]: 1850,
-  },
-  pro_plus: {},
-  team: {},
-  enterprise: {},
+// 값의 정본은 @d3ro/core PLAN_QUOTA. PREMIUM_LLM은 모델별 한도의 합으로 표시하고,
+// 한 모델이라도 무제한이면 한도를 두지 않는다(Free는 Haiku 주 250회).
+function premiumLlmLimit(tier: LicenseTier): number | undefined {
+  const quota = PLAN_QUOTA[tier]
+  const models = [quota.llm_haiku, quota.llm_sonnet, quota.llm_opus].filter((q) => q.limit !== 0)
+  if (models.some((q) => q.limit < 0)) return undefined
+  return models.reduce((sum, q) => sum + q.limit, 0)
 }
 
+const QUOTA_LIMITS: Record<LicenseTier, Partial<Record<Feature, number>>> = Object.fromEntries(
+  (['free', 'pro', 'pro_plus', 'team', 'enterprise'] as const).map((tier) => {
+    const limit = premiumLlmLimit(tier)
+    return [tier, limit === undefined ? {} : { [Feature.PREMIUM_LLM]: limit }]
+  }),
+) as Record<LicenseTier, Partial<Record<Feature, number>>>
+
 // ── 기능별 최소 필요 티어 ──────────────────────────────────
 // 빅뱅 Phase 4: 모든 로컬 기능을 'free'로 해방.
 // 클라우드 기능(PREMIUM_LLM, CLOUD_SYNC)만 로그인 요구 + 티어 gate.
diff --git a/package.json b/package.json
index 9c583da..836644d 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,8 @@
     "checksum": "node scripts/ci/generate-checksums.mjs",
     "version:check": "node scripts/ci/sync-version.mjs --check",
     "version:sync": "node scripts/ci/sync-version.mjs --write",
+    "contract:check": "node scripts/ci/sync-core-contract.mjs --check",
+    "contract:sync": "node scripts/ci/sync-core-contract.mjs --write",
     "release:metadata": "node scripts/ci/verify-release-metadata.mjs",
     "release:metadata:test": "node scripts/ci/verify-release-metadata.mjs --self-test",
     "release:forgejo": "node scripts/ci/publish-forgejo-release.mjs",
diff --git a/packages/core/package.json b/packages/core/package.json
index b8b8e49..5ab14ff 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -58,6 +58,14 @@
       "types": "./src/utils/crypto-license.ts",
       "default": "./src/utils/crypto-license.ts"
     },
+    "./plan-catalog": {
+      "types": "./src/plan-catalog.ts",
+      "default": "./src/plan-catalog.ts"
+    },
+    "./web-urls": {
+      "types": "./src/web-urls.ts",
+      "default": "./src/web-urls.ts"
+    },
     "./supabase-config": {
       "types": "./src/supabase-config.ts",
       "default": "./src/supabase-config.ts"
diff --git a/packages/core/src/constants.ts b/packages/core/src/constants.ts
index ca74108..1696c96 100644
--- a/packages/core/src/constants.ts
+++ b/packages/core/src/constants.ts
@@ -1,5 +1,6 @@
 // src/shared/constants.ts
 import type { LicenseTier } from './types'
+import { PLAN_QUOTA, type PlanQuotaFeature, type PlanQuotaPeriod } from './plan-catalog'
 
 /** 타이밍 상수 (Speakly 리버스엔지니어링 기반) */
 export const TIMING = {
@@ -51,39 +52,34 @@ export const AUDIO_FORMAT = {
   BYTES_PER_SAMPLE: 2
 } as const
 
-/** Premium 모델별 쿼터 한도 (LicenseService QUOTA_LIMITS, 서버 quota.ts와 동기) */
+/** Premium 모델별 쿼터 표시 행. 값의 정본은 plan-catalog.ts `PLAN_QUOTA`(서버 quota.ts도 같은 값을 생성 사본으로 읽는다). */
 export interface PremiumModelQuota {
-  readonly model: string
+  readonly model: PlanQuotaFeature
   readonly i18nKey: string
   readonly limit: number   // -1 = 무제한
-  readonly period: 'daily' | 'weekly'
+  readonly period: PlanQuotaPeriod
+}
+
+const PREMIUM_MODEL_ROWS: readonly { model: PlanQuotaFeature; i18nKey: string }[] = [
+  { model: 'llm_haiku', i18nKey: 'license.modelHaiku' },
+  { model: 'llm_sonnet', i18nKey: 'license.modelSonnet' },
+  { model: 'llm_opus', i18nKey: 'license.modelOpus' },
+]
+
+function premiumModelLimits(tier: LicenseTier): readonly PremiumModelQuota[] {
+  // limit 0(사용 불가) 모델은 표시하지 않는다 — Free 는 Haiku 한 줄만 남는다.
+  return PREMIUM_MODEL_ROWS
+    .map(({ model, i18nKey }) => ({ model, i18nKey, ...PLAN_QUOTA[tier][model] }))
+    .filter((row) => row.limit !== 0)
 }
 
 export const PREMIUM_MODEL_LIMITS: Record<LicenseTier, readonly PremiumModelQuota[]> = {
-  free: [
-    { model: 'llm_haiku', i18nKey: 'license.modelHaiku', limit: 250, period: 'weekly' },
-  ],
-  pro: [
-    { model: 'llm_haiku', i18nKey: 'license.modelHaiku', limit: 1500, period: 'daily' },
-    { model: 'llm_sonnet', i18nKey: 'license.modelSonnet', limit: 300, period: 'daily' },
-    { model: 'llm_opus', i18nKey: 'license.modelOpus', limit: 50, period: 'daily' },
-  ],
-  pro_plus: [
-    { model: 'llm_haiku', i18nKey: 'license.modelHaiku', limit: -1, period: 'daily' },
-    { model: 'llm_sonnet', i18nKey: 'license.modelSonnet', limit: 1500, period: 'daily' },
-    { model: 'llm_opus', i18nKey: 'license.modelOpus', limit: 300, period: 'daily' },
-  ],
-  team: [
-    { model: 'llm_haiku', i18nKey: 'license.modelHaiku', limit: -1, period: 'daily' },
-    { model: 'llm_sonnet', i18nKey: 'license.modelSonnet', limit: 3000, period: 'daily' },
-    { model: 'llm_opus', i18nKey: 'license.modelOpus', limit: 600, period: 'daily' },
-  ],
-  enterprise: [
-    { model: 'llm_haiku', i18nKey: 'license.modelHaiku', limit: -1, period: 'daily' },
-    { model: 'llm_sonnet', i18nKey: 'license.modelSonnet', limit: -1, period: 'daily' },
-    { model: 'llm_opus', i18nKey: 'license.modelOpus', limit: -1, period: 'daily' },
-  ],
-} as const
+  free: premiumModelLimits('free'),
+  pro: premiumModelLimits('pro'),
+  pro_plus: premiumModelLimits('pro_plus'),
+  team: premiumModelLimits('team'),
+  enterprise: premiumModelLimits('enterprise'),
+}
 
 /** 윈도우 크기 */
 export const WINDOW_SIZE = {
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 628d5c6..86b5255 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -10,6 +10,8 @@ export * from './errors'
 export * from './ipc-channels'
 export * from './constants'
 export * from './entitlement'
+export * from './plan-catalog'
+export * from './web-urls'
 export * from './utils/crypto-license'
 export * from './utils/pii-redactor'
 export * from './utils/secure-memory'
diff --git a/packages/core/src/plan-catalog.ts b/packages/core/src/plan-catalog.ts
new file mode 100644
index 0000000..a53c0dc
--- /dev/null
+++ b/packages/core/src/plan-catalog.ts
@@ -0,0 +1,82 @@
+// packages/core/src/plan-catalog.ts
+// 요금제 가격 SSOT — 데스크톱·웹·관리자·모바일·랜딩 사이트가 모두 여기서 읽는다.
+//
+// Supabase Edge Function(Deno)은 저장소의 이 경로를 번들할 수 없으므로
+// `npm run contract:sync`가 server/supabase/functions/_shared/core-contract.generated.ts 로
+// 값을 복사하고, `npm run contract:check`가 CI에서 어긋남을 막는다.
+// 그래서 이 파일은 import 없이 순수 값만 둔다.
+
+export type PaidPlanTier = 'pro' | 'pro_plus'
+export type PlanTier = 'free' | PaidPlanTier
+
+/**
+ * 월 요금(원). Payple 청구 금액이며, 기존 구독자도 다음 갱신부터 이 값으로 청구된다.
+ * Stripe(USD)·Google Play 가격은 각 콘솔에서 따로 관리한다.
+ */
+export const PLAN_PRICE_KRW: Readonly<Record<PlanTier, number>> = {
+  free: 0,
+  pro: 2900,
+  pro_plus: 8900,
+}
+
+// ── 클라우드 사용량 한도 ─────────────────────────────────
+// 서버(Deno `_shared/quota.ts`)가 실제로 집행하고, 데스크톱·사이트는 표시만 한다.
+// Free 는 주간, 나머지는 일간. limit: -1=무제한, 0=사용 불가, 양수=한도.
+
+/** 사용량 한도를 갖는 티어. 결제 티어 외에 팀·엔터프라이즈 계약 티어를 포함한다. */
+export type PlanQuotaTier = PlanTier | 'team' | 'enterprise'
+
+/** 쿼터 추적 키 — 서버 daily_usage.feature 값과 같다. */
+export type PlanQuotaFeature =
+  | 'stt_transcribe'
+  | 'llm_haiku'
+  | 'llm_sonnet'
+  | 'llm_opus'
+  | 'realtime_session'
+
+export type PlanQuotaPeriod = 'daily' | 'weekly'
+
+export interface PlanQuota {
+  /** -1=무제한, 0=사용 불가, 양수=한도 */
+  readonly limit: number
+  readonly period: PlanQuotaPeriod
+}
+
+export const PLAN_QUOTA: Readonly<Record<PlanQuotaTier, Readonly<Record<PlanQuotaFeature, PlanQuota>>>> = {
+  free: {
+    stt_transcribe: { limit: 250, period: 'weekly' },
+    llm_haiku: { limit: 250, period: 'weekly' },
+    llm_sonnet: { limit: 0, period: 'daily' },
+    llm_opus: { limit: 0, period: 'daily' },
+    realtime_session: { limit: 0, period: 'daily' },
+  },
+  pro: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: 1500, period: 'daily' },
+    llm_sonnet: { limit: 300, period: 'daily' },
+    llm_opus: { limit: 50, period: 'daily' },
+    // 세션 수 기준 (~$0.016/분 mini — 세션당 평균 수 분 가정)
+    realtime_session: { limit: 30, period: 'daily' },
+  },
+  pro_plus: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: -1, period: 'daily' },
+    llm_sonnet: { limit: 1500, period: 'daily' },
+    llm_opus: { limit: 300, period: 'daily' },
+    realtime_session: { limit: 120, period: 'daily' },
+  },
+  team: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: -1, period: 'daily' },
+    llm_sonnet: { limit: 3000, period: 'daily' },
+    llm_opus: { limit: 600, period: 'daily' },
+    realtime_session: { limit: 300, period: 'daily' },
+  },
+  enterprise: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: -1, period: 'daily' },
+    llm_sonnet: { limit: -1, period: 'daily' },
+    llm_opus: { limit: -1, period: 'daily' },
+    realtime_session: { limit: -1, period: 'daily' },
+  },
+}
diff --git a/packages/core/src/web-urls.ts b/packages/core/src/web-urls.ts
new file mode 100644
index 0000000..a7df166
--- /dev/null
+++ b/packages/core/src/web-urls.ts
@@ -0,0 +1,43 @@
+// packages/core/src/web-urls.ts
+// 공개 웹 주소 SSOT — 결제·법률·다운로드·초대 링크는 모두 여기서 만든다.
+//
+// 한 도메인 아래 두 앱이 있다.
+//   /            랜딩 사이트(site/, Cloudflare Pages)  — 다운로드, 법률 문서, 초대 수락
+//   /app/...     웹앱(apps/web, Next basePath '/app') — 로그인, 결제, 대시보드
+// 사이트 브리지 워커(server/cloudflare-site-bridge)가 /app 요청을 웹앱으로 보낸다.
+// Deno 쪽 사본은 plan-catalog.ts 와 같은 방식으로 생성된다. 이 파일도 순수 값만 둔다.
+
+import type { PaidPlanTier } from './plan-catalog'
+
+export const PUBLIC_SITE_ORIGIN = 'https://d3ro.chanpaca.net'
+
+/** apps/web 의 Next basePath. next.config 와 브리지 워커 라우팅이 이 값을 따른다. */
+export const WEB_APP_BASE_PATH = '/app'
+
+export const WEB_APP_URL = `${PUBLIC_SITE_ORIGIN}${WEB_APP_BASE_PATH}`
+
+export const SITE_URLS = {
+  home: `${PUBLIC_SITE_ORIGIN}/`,
+  download: `${PUBLIC_SITE_ORIGIN}/#download`,
+  privacy: `${PUBLIC_SITE_ORIGIN}/privacy/`,
+  terms: `${PUBLIC_SITE_ORIGIN}/terms/`,
+  deleteAccount: `${PUBLIC_SITE_ORIGIN}/delete-account/`,
+  acceptInvite: `${PUBLIC_SITE_ORIGIN}/accept-invite/`,
+} as const
+
+/** 결제 결과로 돌아올 때 붙는 쿼리. apps/web 결제 페이지가 읽는 이름과 같다. */
+export type BillingReturn = 'success' | 'canceled'
+
+/**
+ * 웹 결제 페이지 URL.
+ * - `tier`: 고를 요금제를 미리 선택한다.
+ * - `result`: 외부 결제(Stripe 등)에서 돌아올 때의 결과.
+ */
+export function billingUrl(options: { tier?: PaidPlanTier; result?: BillingReturn } = {}): string {
+  const params = new URLSearchParams()
+  if (options.tier) params.set('tier', options.tier)
+  if (options.result === 'success') params.set('success', '1')
+  if (options.result === 'canceled') params.set('canceled', '1')
+  const query = params.toString()
+  return `${WEB_APP_URL}/billing${query ? `?${query}` : ''}`
+}
diff --git a/scripts/ci/sync-core-contract.mjs b/scripts/ci/sync-core-contract.mjs
new file mode 100644
index 0000000..712139a
--- /dev/null
+++ b/scripts/ci/sync-core-contract.mjs
@@ -0,0 +1,170 @@
+// Core contract (plans + public URLs) generator for runtimes that cannot import packages/core.
+//
+// Supabase Edge Functions run on Deno and are deployed per function directory, so they
+// cannot bundle `packages/core`. Instead of hand-copied constants, this script copies the
+// canonical sources verbatim into one generated file and CI verifies it never drifts.
+//
+// Usage:
+//   node scripts/ci/sync-core-contract.mjs --check   (default; exit 1 when out of sync)
+//   node scripts/ci/sync-core-contract.mjs --write
+
+import { readFileSync, writeFileSync, existsSync } from 'node:fs'
+import { createRequire } from 'node:module'
+import { dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+const root = join(dirname(fileURLToPath(import.meta.url)), '..', '..')
+const args = process.argv.slice(2)
+const write = args.includes('--write')
+const check = args.includes('--check') || !write
+
+if (write && args.includes('--check')) fail('Choose exactly one mode: --check or --write.')
+const unknown = args.filter((arg) => arg !== '--check' && arg !== '--write')
+if (unknown.length > 0) fail(`Unknown arguments: ${unknown.join(' ')}`)
+
+const TARGET = 'server/supabase/functions/_shared/core-contract.generated.ts'
+
+/**
+ * Canonical sources, concatenated in this order. `allowedImports` lists the only
+ * import statements a source may contain; each must point at an earlier source so the
+ * concatenated file stays self-contained.
+ */
+const SOURCES = [
+  { path: 'packages/core/src/plan-catalog.ts', allowedImports: [] },
+  {
+    path: 'packages/core/src/web-urls.ts',
+    allowedImports: ["import type { PaidPlanTier } from './plan-catalog'"],
+  },
+]
+
+const sections = SOURCES.map(({ path, allowedImports }) => {
+  const absolutePath = join(root, path)
+  if (!existsSync(absolutePath)) fail(`Canonical source is missing: ${path}`)
+  const text = readFileSync(absolutePath, 'utf8').replace(/\r\n/g, '\n')
+
+  const importLines = text.split('\n').filter((line) => /^\s*(import|export\s+\*|export\s+\{[^}]*\}\s+from)\b/.test(line))
+  for (const line of importLines) {
+    if (!allowedImports.includes(line.trim())) {
+      fail(
+        `${path} must stay import-free (pure values). Unexpected: "${line.trim()}".\n` +
+          '  Deno cannot resolve it from the generated copy. Move the value into the canonical file instead.',
+      )
+    }
+  }
+  if (/\bDeno\.|\bprocess\.env\b|\bimport\.meta\b|\brequire\(/.test(text)) {
+    fail(`${path} must not read the runtime environment; it is copied into Deno verbatim.`)
+  }
+
+  const body = text
+    .split('\n')
+    .filter((line) => !allowedImports.includes(line.trim()))
+    .join('\n')
+    .trim()
+  return { path, body }
+})
+
+const generated = [
+  '// 생성 파일 — 직접 수정 금지.',
+  `// 정본: ${SOURCES.map(({ path }) => path).join(', ')}`,
+  '// 갱신: npm run contract:sync  /  검사: npm run contract:check',
+  '// Deno Edge Function은 packages/core를 번들할 수 없어서 정본 소스를 그대로 복사한다.',
+  '',
+  ...sections.flatMap(({ path, body }) => [`// ── 원본: ${path} ${'─'.repeat(Math.max(4, 60 - path.length))}`, '', body, '']),
+].join('\n')
+
+await validateContract(generated)
+
+const targetPath = join(root, TARGET)
+const current = existsSync(targetPath) ? readFileSync(targetPath, 'utf8').replace(/\r\n/g, '\n') : null
+
+if (current === generated) {
+  process.stdout.write(`[contract] GREEN ${TARGET}\n`)
+  process.exit(0)
+}
+
+if (check) {
+  process.stderr.write(`[contract] out of sync: ${TARGET}${current === null ? ' (missing)' : ''}\n`)
+  fail('Run `npm run contract:sync` and commit the generated file.')
+}
+
+writeFileSync(targetPath, generated, 'utf8')
+process.stdout.write(`[contract] synchronized ${TARGET}\n`)
+
+/**
+ * Transpile the generated TypeScript with the repository's TypeScript compiler and
+ * evaluate it, so a syntax error or a malformed value fails here instead of at deploy.
+ */
+async function validateContract(source) {
+  let ts
+  try {
+    ts = createRequire(import.meta.url)('typescript')
+  } catch {
+    fail('The `typescript` package is required. Run `npm ci` at the repository root first.')
+  }
+  const output = ts.transpileModule(source, {
+    reportDiagnostics: true,
+    compilerOptions: { module: ts.ModuleKind.ESNext, target: ts.ScriptTarget.ES2022 },
+  })
+  const diagnostics = output.diagnostics ?? []
+  if (diagnostics.length > 0) {
+    const messages = diagnostics.map((d) => ts.flattenDiagnosticMessageText(d.messageText, '\n'))
+    fail(`Generated contract does not parse:\n  ${messages.join('\n  ')}`)
+  }
+
+  let contract
+  try {
+    contract = await import(`data:text/javascript;base64,${Buffer.from(output.outputText).toString('base64')}`)
+  } catch (error) {
+    fail(`Generated contract cannot be evaluated: ${error instanceof Error ? error.message : String(error)}`)
+  }
+
+  const prices = contract.PLAN_PRICE_KRW
+  expectKeys('PLAN_PRICE_KRW', prices, ['free', 'pro', 'pro_plus'])
+  if (prices.free !== 0) fail('PLAN_PRICE_KRW.free must be 0.')
+  for (const tier of ['pro', 'pro_plus']) {
+    if (!Number.isSafeInteger(prices[tier]) || prices[tier] < 100) {
+      fail(`PLAN_PRICE_KRW.${tier} must be a whole KRW amount >= 100; got ${prices[tier]}.`)
+    }
+  }
+
+  const quota = contract.PLAN_QUOTA
+  const features = ['stt_transcribe', 'llm_haiku', 'llm_sonnet', 'llm_opus', 'realtime_session']
+  expectKeys('PLAN_QUOTA', quota, ['free', 'pro', 'pro_plus', 'team', 'enterprise'])
+  for (const [tier, perFeature] of Object.entries(quota)) {
+    expectKeys(`PLAN_QUOTA.${tier}`, perFeature, features)
+    for (const [feature, value] of Object.entries(perFeature)) {
+      if (!Number.isSafeInteger(value?.limit) || value.limit < -1 || !['daily', 'weekly'].includes(value?.period)) {
+        fail(`PLAN_QUOTA.${tier}.${feature} must be { limit: integer >= -1, period: daily|weekly }.`)
+      }
+    }
+  }
+
+  let origin
+  try {
+    origin = new URL(contract.PUBLIC_SITE_ORIGIN)
+  } catch {
+    fail(`PUBLIC_SITE_ORIGIN is not a URL: ${contract.PUBLIC_SITE_ORIGIN}`)
+  }
+  if (origin.protocol !== 'https:' || origin.origin !== contract.PUBLIC_SITE_ORIGIN) {
+    fail(`PUBLIC_SITE_ORIGIN must be a bare https origin; got ${contract.PUBLIC_SITE_ORIGIN}`)
+  }
+  for (const [key, url] of Object.entries(contract.SITE_URLS ?? {})) {
+    if (!String(url).startsWith(`${contract.PUBLIC_SITE_ORIGIN}/`)) fail(`SITE_URLS.${key} must live under PUBLIC_SITE_ORIGIN.`)
+  }
+  const billing = contract.billingUrl({ tier: 'pro', result: 'success' })
+  if (billing !== `${contract.WEB_APP_URL}/billing?tier=pro&success=1`) {
+    fail(`billingUrl() contract changed unexpectedly: ${billing}`)
+  }
+}
+
+function expectKeys(label, value, expected) {
+  const actual = value && typeof value === 'object' ? Object.keys(value).sort() : []
+  if (JSON.stringify(actual) !== JSON.stringify([...expected].sort())) {
+    fail(`${label} keys must be exactly: ${expected.join(', ')} (got ${actual.join(', ') || 'none'})`)
+  }
+}
+
+function fail(message) {
+  process.stderr.write(`[contract] ${message}\n`)
+  process.exit(1)
+}
diff --git a/server/supabase/functions/_shared/billing-catalog.test.ts b/server/supabase/functions/_shared/billing-catalog.test.ts
index e54a709..4354e94 100644
--- a/server/supabase/functions/_shared/billing-catalog.test.ts
+++ b/server/supabase/functions/_shared/billing-catalog.test.ts
@@ -2,6 +2,7 @@ import {
   createBillingCatalog,
   parseStripeCatalogPrice,
 } from './billing-catalog.ts'
+import { PLAN_PRICE_KRW } from './core-contract.generated.ts'
 
 function assert(condition: unknown, message: string): asserts condition {
   if (!condition) throw new Error(message)
@@ -46,13 +47,18 @@ Deno.test('Stripe catalog rejects mismatched, inactive, free, malformed, and one
 
 Deno.test('catalog exposes only configured provider prices and never invents a fallback', () => {
   const catalog = createBillingCatalog({
-    payple: { pro: 9900, pro_plus: 29900 },
+    payple: { pro: PLAN_PRICE_KRW.pro, pro_plus: PLAN_PRICE_KRW.pro_plus },
     stripe: {
       pro: { unit_amount: 990, currency: 'USD', interval: 'month', interval_count: 1 },
     },
   })
   assert(catalog.plans[0].prices.length === 2, 'pro must expose two verified providers')
   assert(catalog.plans[1].prices.length === 1, 'pro plus must omit unavailable Stripe')
+  assert(
+    catalog.plans[0].prices[0].unit_amount === PLAN_PRICE_KRW.pro
+      && catalog.plans[1].prices[0].unit_amount === PLAN_PRICE_KRW.pro_plus,
+    'Payple prices must come from the core plan catalog',
+  )
 
   const unavailable = createBillingCatalog({})
   assert(unavailable.plans.every((plan) => plan.prices.length === 0), 'missing configuration must stay unavailable')
diff --git a/server/supabase/functions/_shared/core-contract.generated.ts b/server/supabase/functions/_shared/core-contract.generated.ts
new file mode 100644
index 0000000..f302dfa
--- /dev/null
+++ b/server/supabase/functions/_shared/core-contract.generated.ts
@@ -0,0 +1,134 @@
+// 생성 파일 — 직접 수정 금지.
+// 정본: packages/core/src/plan-catalog.ts, packages/core/src/web-urls.ts
+// 갱신: npm run contract:sync  /  검사: npm run contract:check
+// Deno Edge Function은 packages/core를 번들할 수 없어서 정본 소스를 그대로 복사한다.
+
+// ── 원본: packages/core/src/plan-catalog.ts ───────────────────────────
+
+// packages/core/src/plan-catalog.ts
+// 요금제 가격 SSOT — 데스크톱·웹·관리자·모바일·랜딩 사이트가 모두 여기서 읽는다.
+//
+// Supabase Edge Function(Deno)은 저장소의 이 경로를 번들할 수 없으므로
+// `npm run contract:sync`가 server/supabase/functions/_shared/core-contract.generated.ts 로
+// 값을 복사하고, `npm run contract:check`가 CI에서 어긋남을 막는다.
+// 그래서 이 파일은 import 없이 순수 값만 둔다.
+
+export type PaidPlanTier = 'pro' | 'pro_plus'
+export type PlanTier = 'free' | PaidPlanTier
+
+/**
+ * 월 요금(원). Payple 청구 금액이며, 기존 구독자도 다음 갱신부터 이 값으로 청구된다.
+ * Stripe(USD)·Google Play 가격은 각 콘솔에서 따로 관리한다.
+ */
+export const PLAN_PRICE_KRW: Readonly<Record<PlanTier, number>> = {
+  free: 0,
+  pro: 2900,
+  pro_plus: 8900,
+}
+
+// ── 클라우드 사용량 한도 ─────────────────────────────────
+// 서버(Deno `_shared/quota.ts`)가 실제로 집행하고, 데스크톱·사이트는 표시만 한다.
+// Free 는 주간, 나머지는 일간. limit: -1=무제한, 0=사용 불가, 양수=한도.
+
+/** 사용량 한도를 갖는 티어. 결제 티어 외에 팀·엔터프라이즈 계약 티어를 포함한다. */
+export type PlanQuotaTier = PlanTier | 'team' | 'enterprise'
+
+/** 쿼터 추적 키 — 서버 daily_usage.feature 값과 같다. */
+export type PlanQuotaFeature =
+  | 'stt_transcribe'
+  | 'llm_haiku'
+  | 'llm_sonnet'
+  | 'llm_opus'
+  | 'realtime_session'
+
+export type PlanQuotaPeriod = 'daily' | 'weekly'
+
+export interface PlanQuota {
+  /** -1=무제한, 0=사용 불가, 양수=한도 */
+  readonly limit: number
+  readonly period: PlanQuotaPeriod
+}
+
+export const PLAN_QUOTA: Readonly<Record<PlanQuotaTier, Readonly<Record<PlanQuotaFeature, PlanQuota>>>> = {
+  free: {
+    stt_transcribe: { limit: 250, period: 'weekly' },
+    llm_haiku: { limit: 250, period: 'weekly' },
+    llm_sonnet: { limit: 0, period: 'daily' },
+    llm_opus: { limit: 0, period: 'daily' },
+    realtime_session: { limit: 0, period: 'daily' },
+  },
+  pro: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: 1500, period: 'daily' },
+    llm_sonnet: { limit: 300, period: 'daily' },
+    llm_opus: { limit: 50, period: 'daily' },
+    // 세션 수 기준 (~$0.016/분 mini — 세션당 평균 수 분 가정)
+    realtime_session: { limit: 30, period: 'daily' },
+  },
+  pro_plus: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: -1, period: 'daily' },
+    llm_sonnet: { limit: 1500, period: 'daily' },
+    llm_opus: { limit: 300, period: 'daily' },
+    realtime_session: { limit: 120, period: 'daily' },
+  },
+  team: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: -1, period: 'daily' },
+    llm_sonnet: { limit: 3000, period: 'daily' },
+    llm_opus: { limit: 600, period: 'daily' },
+    realtime_session: { limit: 300, period: 'daily' },
+  },
+  enterprise: {
+    stt_transcribe: { limit: -1, period: 'daily' },
+    llm_haiku: { limit: -1, period: 'daily' },
+    llm_sonnet: { limit: -1, period: 'daily' },
+    llm_opus: { limit: -1, period: 'daily' },
+    realtime_session: { limit: -1, period: 'daily' },
+  },
+}
+
+// ── 원본: packages/core/src/web-urls.ts ───────────────────────────────
+
+// packages/core/src/web-urls.ts
+// 공개 웹 주소 SSOT — 결제·법률·다운로드·초대 링크는 모두 여기서 만든다.
+//
+// 한 도메인 아래 두 앱이 있다.
+//   /            랜딩 사이트(site/, Cloudflare Pages)  — 다운로드, 법률 문서, 초대 수락
+//   /app/...     웹앱(apps/web, Next basePath '/app') — 로그인, 결제, 대시보드
+// 사이트 브리지 워커(server/cloudflare-site-bridge)가 /app 요청을 웹앱으로 보낸다.
+// Deno 쪽 사본은 plan-catalog.ts 와 같은 방식으로 생성된다. 이 파일도 순수 값만 둔다.
+
+
+export const PUBLIC_SITE_ORIGIN = 'https://d3ro.chanpaca.net'
+
+/** apps/web 의 Next basePath. next.config 와 브리지 워커 라우팅이 이 값을 따른다. */
+export const WEB_APP_BASE_PATH = '/app'
+
+export const WEB_APP_URL = `${PUBLIC_SITE_ORIGIN}${WEB_APP_BASE_PATH}`
+
+export const SITE_URLS = {
+  home: `${PUBLIC_SITE_ORIGIN}/`,
+  download: `${PUBLIC_SITE_ORIGIN}/#download`,
+  privacy: `${PUBLIC_SITE_ORIGIN}/privacy/`,
+  terms: `${PUBLIC_SITE_ORIGIN}/terms/`,
+  deleteAccount: `${PUBLIC_SITE_ORIGIN}/delete-account/`,
+  acceptInvite: `${PUBLIC_SITE_ORIGIN}/accept-invite/`,
+} as const
+
+/** 결제 결과로 돌아올 때 붙는 쿼리. apps/web 결제 페이지가 읽는 이름과 같다. */
+export type BillingReturn = 'success' | 'canceled'
+
+/**
+ * 웹 결제 페이지 URL.
+ * - `tier`: 고를 요금제를 미리 선택한다.
+ * - `result`: 외부 결제(Stripe 등)에서 돌아올 때의 결과.
+ */
+export function billingUrl(options: { tier?: PaidPlanTier; result?: BillingReturn } = {}): string {
+  const params = new URLSearchParams()
+  if (options.tier) params.set('tier', options.tier)
+  if (options.result === 'success') params.set('success', '1')
+  if (options.result === 'canceled') params.set('canceled', '1')
+  const query = params.toString()
+  return `${WEB_APP_URL}/billing${query ? `?${query}` : ''}`
+}
diff --git a/server/supabase/functions/_shared/payple.test.ts b/server/supabase/functions/_shared/payple.test.ts
index 728d70c..65058e1 100644
--- a/server/supabase/functions/_shared/payple.test.ts
+++ b/server/supabase/functions/_shared/payple.test.ts
@@ -11,7 +11,9 @@ import {
   PaypleConfigurationError,
   PaypleVerificationError,
   resolvePaypleOrderDate,
+  TIER_PRICE,
 } from './payple.ts'
+import { PLAN_PRICE_KRW } from './core-contract.generated.ts'
 
 function assert(condition: boolean, message: string): asserts condition {
   if (!condition) throw new Error(message)
@@ -90,11 +92,11 @@ Deno.test('Payple synchronous charge and webhook share one provider event identi
     orderId: 'D3RO-20260821153045-test-nonce',
     payerId: 'payer-fixture',
     payType: 'card' as const,
-    amount: 9900,
+    amount: TIER_PRICE.pro,
   }
   const directDigest = await payplePaymentEventDigest(identity)
   const webhookDigest = await payplePaymentEventDigest({ ...identity })
-  const differentCharge = await payplePaymentEventDigest({ ...identity, amount: 29900 })
+  const differentCharge = await payplePaymentEventDigest({ ...identity, amount: TIER_PRICE.pro_plus })
   assert(payplePaymentEventId(identity.orderId) === `payment:${identity.orderId}`, 'canonical event id')
   assert(directDigest === webhookDigest, 'same external charge must be an exact replay')
   assert(directDigest !== differentCharge, 'different charge identity must not collide')
@@ -163,7 +165,7 @@ Deno.test('Payple billing separates definitive declines from ambiguous transport
       try {
         await paypleBilling(config, auth, {
           payerId: 'payer-fixture',
-          amount: 9900,
+          amount: TIER_PRICE.pro,
           orderId: 'D3RO-20260821153045-test-nonce',
           goodsName: 'D3RO Voice Pro',
         })
@@ -177,3 +179,9 @@ Deno.test('Payple billing separates definitive declines from ambiguous transport
     globalThis.fetch = originalFetch
   }
 })
+
+Deno.test('Payple charge amounts are the core plan catalog prices', () => {
+  assert(TIER_PRICE.pro === PLAN_PRICE_KRW.pro, 'Pro charge must equal PLAN_PRICE_KRW.pro')
+  assert(TIER_PRICE.pro_plus === PLAN_PRICE_KRW.pro_plus, 'Pro+ charge must equal PLAN_PRICE_KRW.pro_plus')
+  assert(Object.keys(TIER_PRICE).sort().join(',') === 'pro,pro_plus', 'only paid tiers are chargeable')
+})
diff --git a/server/supabase/functions/_shared/payple.ts b/server/supabase/functions/_shared/payple.ts
index f7e0037..7234931 100644
--- a/server/supabase/functions/_shared/payple.ts
+++ b/server/supabase/functions/_shared/payple.ts
@@ -1,6 +1,8 @@
 // server/supabase/functions/_shared/payple.ts
 // Payple 결제 API 래퍼 — 파트너 인증, 빌링 결제, 취소, 빌링키 해지
 
+import { PLAN_PRICE_KRW } from './core-contract.generated.ts'
+
 // ── 타입 ──────────────────────────────────────────────
 
 export interface PaypleConfig {
@@ -543,9 +545,10 @@ export function calcSubscriptionPeriod(now = new Date()): { start: string; end:
 
 // ── 티어별 가격 ──────────────────────────────────────
 
+/** Payple 청구 금액(원). 정본은 packages/core/src/plan-catalog.ts (생성 사본 경유). */
 export const TIER_PRICE: Record<string, number> = {
-  pro: 9900,
-  pro_plus: 29900,
+  pro: PLAN_PRICE_KRW.pro,
+  pro_plus: PLAN_PRICE_KRW.pro_plus,
 }
 
 export const TIER_GOODS_NAME: Record<string, string> = {
diff --git a/server/supabase/functions/_shared/quota.ts b/server/supabase/functions/_shared/quota.ts
index 44e7ae9..a4d1333 100644
--- a/server/supabase/functions/_shared/quota.ts
+++ b/server/supabase/functions/_shared/quota.ts
@@ -3,64 +3,25 @@
 // Free=Haiku 250/주간, Pro=모델별 일간, Pro+=Haiku 무제한
 
 import { createClient } from '@supabase/supabase-js'
+import {
+  PLAN_QUOTA,
+  type PlanQuota,
+  type PlanQuotaFeature,
+  type PlanQuotaPeriod,
+  type PlanQuotaTier,
+} from './core-contract.generated.ts'
 
-export type Tier = 'free' | 'pro' | 'pro_plus' | 'team' | 'enterprise'
+export type Tier = PlanQuotaTier
 
 /** 쿼터 추적 키 — 모델별 분리 */
-export type QuotaFeature =
-  | 'stt_transcribe'
-  | 'llm_haiku'
-  | 'llm_sonnet'
-  | 'llm_opus'
-  | 'realtime_session'
+export type QuotaFeature = PlanQuotaFeature
 
-export type QuotaPeriod = 'daily' | 'weekly'
+export type QuotaPeriod = PlanQuotaPeriod
 
-interface ModelQuota {
-  /** -1=무제한, 0=사용불가, 양수=한도 */
-  limit: number
-  period: QuotaPeriod
-}
+type ModelQuota = PlanQuota
 
-/** 모델별 쿼터 정책 */
-const MODEL_QUOTA: Record<Tier, Record<QuotaFeature, ModelQuota>> = {
-  free: {
-    stt_transcribe: { limit: 250, period: 'weekly' },
-    llm_haiku: { limit: 250, period: 'weekly' },
-    llm_sonnet: { limit: 0, period: 'daily' },   // 사용불가
-    llm_opus: { limit: 0, period: 'daily' },      // 사용불가
-    realtime_session: { limit: 0, period: 'daily' }, // 사용불가
-  },
-  pro: {
-    stt_transcribe: { limit: -1, period: 'daily' },
-    llm_haiku: { limit: 1500, period: 'daily' },
-    llm_sonnet: { limit: 300, period: 'daily' },
-    llm_opus: { limit: 50, period: 'daily' },
-    // 세션 수 기준 (~$0.016/분 mini — 세션당 평균 수 분 가정)
-    realtime_session: { limit: 30, period: 'daily' },
-  },
-  pro_plus: {
-    stt_transcribe: { limit: -1, period: 'daily' },
-    llm_haiku: { limit: -1, period: 'daily' },    // 무제한
-    llm_sonnet: { limit: 1500, period: 'daily' },
-    llm_opus: { limit: 300, period: 'daily' },
-    realtime_session: { limit: 120, period: 'daily' },
-  },
-  team: {
-    stt_transcribe: { limit: -1, period: 'daily' },
-    llm_haiku: { limit: -1, period: 'daily' },    // 무제한
-    llm_sonnet: { limit: 3000, period: 'daily' },
-    llm_opus: { limit: 600, period: 'daily' },
-    realtime_session: { limit: 300, period: 'daily' },
-  },
-  enterprise: {
-    stt_transcribe: { limit: -1, period: 'daily' },
-    llm_haiku: { limit: -1, period: 'daily' },    // 무제한
-    llm_sonnet: { limit: -1, period: 'daily' },   // 무제한
-    llm_opus: { limit: -1, period: 'daily' },     // 무제한
-    realtime_session: { limit: -1, period: 'daily' }, // 무제한
-  },
-}
+/** 모델별 쿼터 정책. 정본은 packages/core/src/plan-catalog.ts `PLAN_QUOTA` (생성 사본 경유). */
+const MODEL_QUOTA: Readonly<Record<Tier, Readonly<Record<QuotaFeature, ModelQuota>>>> = PLAN_QUOTA
 
 /** Anthropic 모델명 → 쿼터 키 매핑 */
 export function modelToQuotaKey(model: string): QuotaFeature {
diff --git a/server/supabase/functions/_shared/team-contract.test.ts b/server/supabase/functions/_shared/team-contract.test.ts
index 3bd6294..fd9eb72 100644
--- a/server/supabase/functions/_shared/team-contract.test.ts
+++ b/server/supabase/functions/_shared/team-contract.test.ts
@@ -7,6 +7,7 @@ import {
   parseTeamInviteInput,
   TeamContractError,
 } from './team-contract.ts'
+import { PUBLIC_SITE_ORIGIN } from './core-contract.generated.ts'
 
 function assert(condition: boolean, message: string): asserts condition {
   if (!condition) throw new Error(message)
@@ -62,7 +63,7 @@ Deno.test('team accept parser permits only a URL-safe bounded bearer token', ()
 
 Deno.test('site URL is fail-closed to the canonical deployed HTTPS origin', () => {
   assert(
-    normalizeSiteOrigin('https://d3ro.chanpaca.net/app/') === 'https://d3ro.chanpaca.net',
+    normalizeSiteOrigin(`${PUBLIC_SITE_ORIGIN}/app/`) === PUBLIC_SITE_ORIGIN,
     'canonical HTTPS origin must normalize',
   )
   assertContractError(() => normalizeSiteOrigin(undefined), 'site_url_not_configured', 503)
@@ -70,15 +71,15 @@ Deno.test('site URL is fail-closed to the canonical deployed HTTPS origin', () =
   assertContractError(() => normalizeSiteOrigin('https://voice.chanpaca.net'), 'site_url_invalid', 503)
   assertContractError(() => normalizeSiteOrigin('https://d3ro.dev'), 'site_url_invalid', 503)
   assertContractError(() => normalizeSiteOrigin('http://attacker.example'), 'site_url_invalid', 503)
-  assertContractError(() => normalizeSiteOrigin('https://user:pass@d3ro.chanpaca.net'), 'site_url_invalid', 503)
+  assertContractError(() => normalizeSiteOrigin(PUBLIC_SITE_ORIGIN.replace('https://', 'https://user:pass@')), 'site_url_invalid', 503)
   assertContractError(() => normalizeSiteOrigin('javascript:alert(1)'), 'site_url_invalid', 503)
 })
 
 Deno.test('invite URL encodes the token and email HTML escapes every dynamic field', () => {
   const token = 'abcdefghijklmnopqrstuvwx_123456'
-  const url = buildInviteUrl('https://d3ro.chanpaca.net', token)
+  const url = buildInviteUrl(PUBLIC_SITE_ORIGIN, token)
   assert(
-    url === `https://d3ro.chanpaca.net/accept-invite/?token=${token}`,
+    url === `${PUBLIC_SITE_ORIGIN}/accept-invite/?token=${token}`,
     'canonical invite URL required',
   )
   const html = buildInviteEmailHtml({
diff --git a/server/supabase/functions/_shared/team-contract.ts b/server/supabase/functions/_shared/team-contract.ts
index ea44893..ab19a8c 100644
--- a/server/supabase/functions/_shared/team-contract.ts
+++ b/server/supabase/functions/_shared/team-contract.ts
@@ -1,3 +1,5 @@
+import { PUBLIC_SITE_ORIGIN } from './core-contract.generated.ts'
+
 export type TeamInviteRole = 'admin' | 'member'
 
 export interface TeamInviteInput {
@@ -23,7 +25,8 @@ export class TeamContractError extends Error {
 const UUID_PATTERN = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
 const EMAIL_PATTERN = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
 const INVITE_TOKEN_PATTERN = /^[A-Za-z0-9_-]{20,128}$/
-export const CANONICAL_SITE_ORIGIN = 'https://d3ro.chanpaca.net'
+/** 초대 링크가 허용하는 유일한 사이트 origin. 정본은 packages/core/src/web-urls.ts. */
+export const CANONICAL_SITE_ORIGIN = PUBLIC_SITE_ORIGIN
 
 function requireRecord(value: unknown, code: string): Record<string, unknown> {
   if (value === null || typeof value !== 'object' || Array.isArray(value)) {
diff --git a/site/src/pricing.ts b/site/src/pricing.ts
index f81fbe1..12f78bf 100644
--- a/site/src/pricing.ts
+++ b/site/src/pricing.ts
@@ -1,28 +1,23 @@
 // site/src/pricing.ts
-// 요금제 표시 SSOT. 결제 금액의 정본은 서버 결제 카탈로그
-// (server/supabase/functions/_shared/billing-catalog.ts, payple.ts)이며,
-// 여기 값은 그 카탈로그와 같아야 한다. 사용량 한도는
-// packages/core/src/constants.ts의 PREMIUM_MODEL_LIMITS와 같은 값이다.
+// 요금제 카드에 넣을 클라우드 사용량 표시값. 값의 정본은
+// packages/core/src/plan-catalog.ts `PLAN_QUOTA`(서버 quota.ts도 같은 값을 쓴다)이고,
+// 여기서는 i18n 문구의 {haiku}/{sonnet}/{opus} 자리표시자 이름으로 바꾸기만 한다.
+// 가격(PLAN_PRICE_KRW)과 결제 링크(billingUrl)는 Pricing.tsx 가 정본에서 직접 읽는다.
 
-export type PaidTier = 'pro' | 'pro_plus'
+import { PLAN_QUOTA, type PlanQuotaFeature, type PlanTier } from '../../packages/core/src/plan-catalog'
 
-/** 월 요금(원). */
-export const PLAN_PRICE_KRW = {
-  free: 0,
-  pro: 2900,
-  proPlus: 8900,
-} as const
+const QUOTA_PLACEHOLDERS: ReadonlyArray<readonly [placeholder: string, feature: PlanQuotaFeature]> = [
+  ['haiku', 'llm_haiku'],
+  ['sonnet', 'llm_sonnet'],
+  ['opus', 'llm_opus'],
+]
 
-/** 클라우드 다듬기 사용량. -1은 무제한. Free는 주간, 유료는 일간. */
-export const PLAN_CLOUD_QUOTA = {
-  free: { haiku: 250 },
-  pro: { haiku: 1500, sonnet: 300, opus: 50 },
-  proPlus: { haiku: -1, sonnet: 1500, opus: 300 },
-} as const
-
-/** 데스크톱 앱 결제 완료 URL과 같은 웹 결제 페이지. */
-const BILLING_URL = 'https://d3ro.chanpaca.net/billing'
-
-export function billingUrl(tier: PaidTier): string {
-  return `${BILLING_URL}?tier=${tier}`
+/** 클라우드 다듬기 사용량. -1은 무제한. Free는 주간, 유료는 일간. 사용 불가(0) 모델은 뺀다. */
+export function planCloudQuota(tier: PlanTier): Record<string, number> {
+  const quota: Record<string, number> = {}
+  for (const [placeholder, feature] of QUOTA_PLACEHOLDERS) {
+    const { limit } = PLAN_QUOTA[tier][feature]
+    if (limit !== 0) quota[placeholder] = limit
+  }
+  return quota
 }
diff --git a/site/src/sections/Pricing.tsx b/site/src/sections/Pricing.tsx
index 31d7fce..554076c 100644
--- a/site/src/sections/Pricing.tsx
+++ b/site/src/sections/Pricing.tsx
@@ -2,7 +2,9 @@ import { Container } from '../components/Container'
 import { SectionHeading } from '../components/SectionHeading'
 import { CheckIcon, ExternalIcon } from '../components/icons'
 import { fmt, useI18n, type PlanCopy } from '../i18n'
-import { PLAN_CLOUD_QUOTA, PLAN_PRICE_KRW, billingUrl } from '../pricing'
+import { PLAN_PRICE_KRW } from '../../../packages/core/src/plan-catalog'
+import { billingUrl } from '../../../packages/core/src/web-urls'
+import { planCloudQuota } from '../pricing'
 
 interface PlanView {
   key: 'free' | 'pro' | 'proPlus'
@@ -22,9 +24,9 @@ export function Pricing() {
   const quotaValue = (n: number) => (n < 0 ? t.pricing.unlimited : count.format(n))
 
   const plans: PlanView[] = [
-    { key: 'free', copy: t.pricing.free, price: PLAN_PRICE_KRW.free, quota: PLAN_CLOUD_QUOTA.free, href: '#download', external: false, emphasized: false },
-    { key: 'pro', copy: t.pricing.pro, price: PLAN_PRICE_KRW.pro, quota: PLAN_CLOUD_QUOTA.pro, href: billingUrl('pro'), external: true, emphasized: true },
-    { key: 'proPlus', copy: t.pricing.proPlus, price: PLAN_PRICE_KRW.proPlus, quota: PLAN_CLOUD_QUOTA.proPlus, href: billingUrl('pro_plus'), external: true, emphasized: false },
+    { key: 'free', copy: t.pricing.free, price: PLAN_PRICE_KRW.free, quota: planCloudQuota('free'), href: '#download', external: false, emphasized: false },
+    { key: 'pro', copy: t.pricing.pro, price: PLAN_PRICE_KRW.pro, quota: planCloudQuota('pro'), href: billingUrl({ tier: 'pro' }), external: true, emphasized: true },
+    { key: 'proPlus', copy: t.pricing.proPlus, price: PLAN_PRICE_KRW.pro_plus, quota: planCloudQuota('pro_plus'), href: billingUrl({ tier: 'pro_plus' }), external: true, emphasized: false },
   ]
 
   return (