Can I vibe code Alloy Automation?

Build a lightweight web-based workflow automation engine tailored for a single Shopify store in Node.js, Express, PostgreSQL, and BullMQ.

1. DATA MODEL:
- Webhooks: id, source, payload (JSONB), received_at, status.
- Workflows: id, name, trigger_event, is_active, created_at.
- WorkflowNodes: id, workflow_id, step_order, node_type (action/condition), config (JSONB holding API endpoint, headers, payload template).
- ExecutionLogs: id, workflow_id, status (success/failed), error_message, step_results (JSONB).

2. CORE FUNCTIONALITY:
- Implement an endpoint POST /webhooks/shopify to receive incoming store events (e.g., order/created).
- Validate Shopify webhook HMAC signatures before processing.
- Push received valid webhooks into a BullMQ queue ('workflow-execution').
- Build a worker that processes queue jobs: fetch matching active Workflows for the trigger event.
- Execute steps sequentially: support HTTP Request nodes (making axios calls with Mustache variable substitution from the initial payload) and Conditional nodes (evaluating path checks like payload.total_price > 100).
- Record output and status of each step in ExecutionLogs.

3. FAILURE MODES & RETRIES:
- Implement exponential backoff in BullMQ (up to 5 retries) for 5xx HTTP response codes from downstream APIs.
- Do NOT retry on 4xx responses; mark log as failed and record error response body.
- Handle JSON parsing errors gracefully without crashing the worker.

4. OUT OF SCOPE:
- Visual drag-and-drop frontend UI (use plain JSON config endpoint to create workflows).
- OAuth flows for third-party apps (use raw API tokens stored securely in environment variables or DB secrets).
- Multi-tenant authentication.

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