Can I vibe code ActiveCampaign?

Build a production-ready marketing automation engine and visual workflow manager in Node.js (TypeScript) and Next.js (App Router).

CORE DATA MODEL & ENTITIES:
1. Contact: id, email, phone, tags (array), custom_fields (JSONB), status (subscribed, unsubscribed, bounced), created_at, updated_at.
2. EventLog: id, contact_id, event_type (e.g., store.order_placed, store.cart_abandoned, site.page_viewed), payload (JSONB), timestamp.
3. Workflow: id, name, graph_json (nodes and edges structured for execution), status (active, draft), trigger_event.
4. ExecutionState: id, workflow_id, contact_id, current_node_id, state_data (JSONB), next_execution_time, status (pending, completed, failed).

INTEGRATIONS & QUEUES:
- Webhook ingest endpoint for Shopify/WooCommerce webhooks (`/api/webhooks/store`). Validate HMAC signatures.
- Redis + BullMQ for event processing and delayed execution steps (e.g., wait 2 hours after cart abandonment).
- SendGrid/Postmark API for email delivery; Twilio API for SMS delivery.

WORKFLOW EXECUTION ENGINE:
- Evaluate trigger events against active workflows. Create an ExecutionState entry for matching contacts.
- Process node types: 
  - Action Nodes: Send Email, Send SMS, Add Tag, Remove Tag, Update Custom Field.
  - Delay Nodes: Absolute date or relative time (e.g., wait 3 days).
  - Condition Nodes: Check contact tags, custom fields, or event history (e.g., if order_value > 100).
- Implement atomic node state transitions using Postgres transactions. Ensure idempotency so steps are never executed twice for the same event state.

UI COMPONENTS (React Flow + Tailwind CSS):
- Node-based flowchart editor to drag and connect triggers, delays, conditions, and actions.
- Real-time workflow analytics view showing total contacts at each step.
- Contact profile page displaying full timeline of activity logs, applied tags, and automation history.

OUT OF SCOPE:
- Native drag-and-drop HTML email builder (use plain HTML textarea or standard Markdown).
- Sales CRM deal pipelines and lead scoring.
- Built-in AI text/image generator.

FAILURE MODES TO HANDLE:
- Webhook retry loops: Handle duplicate webhook payloads gracefully using deduplication keys in Redis.
- Unsubscribe compliance: Immediately halt execution workflows if a contact triggers an unsubscribe or spam report event prior to a scheduled send step.

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