Can I vibe code Alcmeon?

Build a multi-channel social messaging inbox in Node.js/TypeScript and React.

Data Model:
- Account (id, name, created_at)
- Channel (id, account_id, provider ['whatsapp', 'messenger', 'instagram', 'twitter', 'google'], credentials_json, status)
- Conversation (id, account_id, channel_id, external_user_id, status ['open', 'pending', 'closed'], assigned_agent_id, tags_array, updated_at)
- Message (id, conversation_id, direction ['inbound', 'outbound'], content, sender_type ['customer', 'agent', 'bot'], external_message_id, created_at)
- Agent (id, account_id, email, role ['admin', 'supervisor', 'agent'])

Core Features:
1. Webhook Receivers: Implement REST endpoints `/webhooks/:channel_id` handling signature verification and inbound payload parsing for WhatsApp Cloud API and Meta Graph API (Messenger/Instagram). Normalize incoming messages into the Message and Conversation tables.
2. Unified Inbox UI: React dashboard displaying conversations sorted by `updated_at`. Include filtering by channel provider, conversation status, and assigned agent.
3. Message Sender Service: API routes to dispatch outbound responses via channel-specific REST APIs (e.g., Meta Graph API v18.0) using stored channel credentials.
4. LLM Assistant: Integrate OpenAI API to generate suggested replies based on the last 5 messages in the conversation thread and a configurable brand system prompt.

Out of Scope:
- Public social post comment moderation (only private messaging threads).
- Audio call or video call integrations.
- Enterprise SSO (SAML/Okta) and advanced role-based ACLs.
- Mobile native applications.

Failure Modes to Handle:
- Webhook signature validation failures must return HTTP 401 without processing.
- Duplicate inbound webhooks (identified by `external_message_id`) must be deduplicated idempotently.
- Rate limits (HTTP 429) from upstream social APIs must trigger exponential backoff retry via a queue (e.g., BullMQ).

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