Infra Cost

1. Cost Inventory

Catalog infrastructure costs by:

• Service category: Compute, storage, database, networking, observability, etc.
• Environment: Production, staging, development, CI/CD
• Team/Product: Which team or product area owns the spend

2. Efficiency Metrics

Track key efficiency metrics:

3. Waste Detection

Identify common waste patterns:

4. Optimization Recommendations

For each waste item:

• What: Specific resource or pattern
• Current cost: Monthly spend
• Potential savings: Estimated monthly savings
• Effort: Easy / Medium / Hard
• Risk: Low / Medium / High
• Action: Specific steps to optimize

5. Cost Forecasting

Project future costs based on:

• Growth in customers/users
• Planned infrastructure changes
• Historical cost trends
• Upcoming product launches

Output Format

Cost Analysis Report

## Infrastructure Cost Analysis: [Project]
### Period: [Month/Quarter]

### Summary
| Metric | Value | Trend | Target |
|--------|-------|-------|--------|
| Total Monthly Spend | $X | ↑/↓/→ | $X |
| Infra as % of Revenue | X% | ↑/↓/→ | <X% |
| Cost per Customer | $X | ↑/↓/→ | <$X |

### Spend by Category
| Category | Monthly | % of Total | MoM Change |
|----------|---------|------------|------------|
| Compute | $X | X% | +X% |
| Database | $X | X% | +X% |
| Storage | $X | X% | +X% |
| Other | $X | X% | +X% |

### Top 5 Cost Drivers
1. [Service/Resource] — $X/mo — [Why it's expensive]
2. ...

### Optimization Opportunities
| Opportunity | Current | Savings | Effort | Risk |
|-------------|---------|---------|--------|------|
| [Action] | $X/mo | $X/mo | Easy | Low |
| [Action] | $X/mo | $X/mo | Medium | Medium |

**Total Potential Monthly Savings:** $X

### Forecast
| Period | Projected Spend | Key Drivers |
|--------|-----------------|-------------|
| Next Month | $X | [What's changing] |
| Next Quarter | $X | [What's changing] |

### Recommendations
1. **Immediate:** [Quick wins with low effort]
2. **This Quarter:** [Medium-term optimizations]
3. **Consider:** [Larger architectural changes]

File Structure

data/engineering/
├── infra_costs.json         # Current cost data
├── cost_history/            # Historical snapshots
│   └── costs_YYYY-MM.json
└── optimizations/           # Optimization tracking
    └── optimization_[id].json

JSON Schema

infra_costs.json

{
  "version": "1.0",
  "lastUpdated": "YYYY-MM-DD",
  "period": "YYYY-MM",
  "totalMonthlySpend": 0,
  "currency": "USD",
  "byCategory": {
    "compute": { "spend": 0, "items": [] },
    "database": { "spend": 0, "items": [] },
    "storage": { "spend": 0, "items": [] },
    "networking": { "spend": 0, "items": [] },
    "observability": { "spend": 0, "items": [] },
    "other": { "spend": 0, "items": [] }
  },
  "byEnvironment": {
    "production": 0,
    "staging": 0,
    "development": 0,
    "cicd": 0
  },
  "metrics": {
    "infraAsPercentOfRevenue": null,
    "costPerCustomer": null,
    "computeUtilization": null
  },
  "optimizations": [
    {
      "id": "",
      "description": "",
      "currentCost": 0,
      "potentialSavings": 0,
      "effort": "easy | medium | hard",
      "risk": "low | medium | high",
      "status": "identified | in_progress | completed | rejected"
    }
  ],
  "forecast": {
    "nextMonth": 0,
    "nextQuarter": 0,
    "assumptions": []
  }
}

Relationship to /cto

This skill provides cost visibility for the CTO:

• "Run /infra-cost to analyze this month's cloud spend"
• "Find optimization opportunities with /infra-cost"
• "Forecast infrastructure costs for the fundraise deck"