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+# Architectural Response
+
+**Re:** ModpackChecker Phase 11 — Complete Licensing & Distribution System
+**Date:** 2026-04-12
+
+## 1. Gemini's Verdict
+Build the licensing system directly into Arbiter on Command Center. Two BuiltByBit listings (Standard $14.99, Professional $24.99), one webhook endpoint, tier detection via resource_id. No DRM, no obfuscation. Gated updates + gated support is the moat.
+
+## 2. Action Plan
+
+### Database (Command Center PostgreSQL — arbiter_db)
+- [ ] Create `mvc_licenses` table: id, order_id (UNIQUE), buyer_id, discord_id (UNIQUE), tier (default 'standard'), max_activations (default 2), status (default 'active'), created_at
+- [ ] Create `mvc_activations` table: id, license_id (FK), panel_domain, panel_ip, activated_at, last_seen, UNIQUE(license_id, panel_domain)
+
+### Arbiter API Routes (src/routes/mvc.js)
+- [ ] `POST /api/mvc/activate` — receives {order_id, domain, ip}, checks license exists + under activation limit, inserts activation, returns {status, tier}
+- [ ] `POST /api/mvc/validate` — 72hr phone-home, updates last_seen, returns {status, tier}
+- [ ] `POST /api/mvc/deactivate` — deletes activation row, frees slot
+- [ ] `POST /api/mvc/webhook/bbb` — BuiltByBit purchase webhook, auto-provisions license with tier based on resource_id
+- [ ] `GET /api/mvc/latest-version` — returns current version number for update checks
+
+### Arbiter Environment Variables
+- [ ] Add to .env: `BBB_STANDARD_RESOURCE_ID`, `BBB_PRO_RESOURCE_ID`
+
+### Arbiter Discord Bot Command
+- [ ] `/verify-mvc ORDER_ID` — checks mvc_licenses, if valid and discord_id not claimed by another user, sets discord_id and assigns "ModpackChecker Customer" role
+
+### Blueprint Extension Changes
+- [ ] Admin UI: Single "BuiltByBit Order ID" text input + "Save & Activate" button + status indicator (green/yellow/red/gray)
+- [ ] Phone-home cron: Laravel Artisan command `mvc:validate`, registered to run daily via Schedule
+- [ ] Payload: order_id, domain (config('app.url')), version, php_version
+- [ ] Grace period: On validation failure, write status + expires_at to local config. Yellow banner in admin. After 7 days, red banner + hide client-facing widgets
+- [ ] Tier-gated features: If tier != 'professional', disable FTB support, disable auto-cron, disable Discord webhook
+- [ ] Update check: Call GET /api/mvc/latest-version daily, show "update available" link to BuiltByBit page in admin
+
+### Pricing (LOCKED — DO NOT CHANGE)
+- Standard: $14.99 (CurseForge + Modrinth, manual checks, 48h support)
+- Professional: $24.99 (+ FTB, auto-cron, Discord webhooks, 24h support)
+- Two separate BuiltByBit listings, same webhook URL
+- Launch at full price, no discounts except 15% Discord-exclusive for bug reporters
+
+## 3. Updated Rules/Context
+- The Arbiter codebase is at services/arbiter-3.0/ but deploys to Command Center at /opt/arbiter-3.0
+- Arbiter deployment pattern: backup → clone to /tmp → syntax check → copy to /opt/arbiter-3.0 → restart service → verify
+- Database is PostgreSQL arbiter_db on Command Center (127.0.0.1)
+- The Chronicler handles Arbiter deployments via Trinity Core SSH — Code handles code writing, Chronicler handles deployment
+- Blueprint extension code is at services/modpack-version-checker/blueprint-extension/
+- Test the full flow on the Dev Panel before any production deployment