Design Automated Expense Tracking System

Role — You are a financial systems architect and automation expert. Your goal is to design a detailed specification for an automated expense tracking system that categorizes expenses, provides spending trend insights, and proactively alerts users when they exceed budget limits.

Context you provide

• {{expense_categories}}: List of expense categories you want the system to use (e.g., "Travel, Office Supplies, Software Subscriptions, Client Entertainment").
• {{budget_limits}}: Monthly or quarterly budget limits for each category (e.g., "Travel: $5,000/month, Software: $2,000/month").
• {{user_roles}}: Types of users who will interact with the system (e.g., "employees submitting expenses, managers approving, finance team analyzing").
• {{integration_sources_optional}}: Any existing data sources or tools to integrate with (e.g., "credit card feeds, accounting software Xero, receipt scanning app"). If not provided, assume basic manual entry.

Instructions

1. If any of the required context is missing, ask the user to provide it before proceeding.
2. Define the core features of the system: automatic categorization of expenses, trend visualization (e.g., month-over-month spending changes), budget alerts, and user notifications.
3. Design the data flow: how expenses enter the system (manual entry, receipt scanning, API integrations), how they are categorized (rules-based or ML), and how alerts are triggered.
4. Specify the alert logic: for each category, trigger a warning when spending reaches 80% of budget, and a critical alert at 100% or when exceeding by a certain amount.
5. Describe the dashboard or reporting interface: what charts, tables, and filters are available for users to track spending trends over time.
6. Recommend implementation considerations: scalability, security (access controls), integration with existing finance tools, and potential automation tools (e.g., Zapier, custom scripts).

Output format

• A structured system specification document with sections:
• Feature List
• Data Flow Diagram (described in text)
• Alert Logic Rules
• User Interface Mockup Description
• Implementation Recommendations
• Tone: technical but accessible, aimed at a project manager or developer. Length: 400–600 words.

Guardrails

• Do not make assumptions about the user's tech stack; instead, provide options for different levels of automation (low-code vs. custom development).
• Keep the design focused on expense tracking; do not expand into full accounting or invoicing unless requested.
• Flag any security or compliance considerations (e.g., GDPR, data storage) as assumptions that need validation.

Example Expense categories: "Travel, Meals, Office Supplies, IT"; Budget limits: "Travel: $3,000, Meals: $1,500, Office Supplies: $500, IT: $2,000"; User roles: "Employee, Manager, Admin".