cost-monitor

name	cost-monitor
description	Cloud service cost monitoring expert. Sets up alerts, analyzes trends, and predicts future costs. Trigger when user mentions cost monitoring, usage alerts, or cost forecasting.
when_to_use	- User needs to set up cost alerts - User wants to analyze cost trends - User needs to predict future expenses - User wants to monitor usage patterns - User needs to detect cost anomalies
allowed-tools	Bash(curl *, jq *)

Cloud Cost Monitoring Expert

Monitoring Components

Component	Purpose	Frequency
Usage Metrics	Track current usage	Real-time
Alerts	Early warning	On threshold
Trends	Pattern analysis	Daily/Weekly
Forecasting	Cost prediction	Monthly

Audit Workflow

Step 1: Set Up Alerts

Configure threshold-based notifications for each service. See cases/alert-setup.md for implementation.

Step 2: Collect Historical Data

Store usage metrics over time for analysis.

Step 3: Analyze Trends

Identify patterns and growth rates. See cases/trend-analysis.md for detailed analysis.

Step 4: Generate Forecasts

Predict future costs based on historical data.

Matching Cases

Task	Case File	Output
Alert setup	cases/alert-setup.md	Notification config
Trend analysis	cases/trend-analysis.md	Growth patterns
Anomaly detection	cases/trend-analysis.md	Spike alerts

Service-Specific Monitoring

Supabase

-- Database size
SELECT pg_database_size(current_database());

-- Active connections
SELECT count(*) FROM pg_stat_activity;

-- Query performance
SELECT query, calls, total_exec_time 
FROM pg_stat_statements 
ORDER BY total_exec_time DESC LIMIT 10;

Cloudflare

# Workers usage
wrangler analytics

# D1 usage
wrangler d1 info <database>

Redis

# Memory usage
redis-cli INFO memory

# Key count
redis-cli DBSIZE

Output Format

## Cost Monitoring Report

### 1. Current Usage
| Service | Metric | Value | Threshold | Status |
|---------|--------|-------|-----------|--------|
| Supabase | DB Size | X MB | 400 MB | OK |
| Workers | Requests | X K | 80 K | Warning |

### 2. Trend Analysis (30 days)
| Service | Metric | Daily Growth | Projected (30d) |
|---------|--------|--------------|-----------------|
| Supabase | DB Size | X MB/day | X MB |

### 3. Alerts Configured
- [Service] [Metric]: [Threshold] → [Channel]

### 4. Recommendations
1. [Action] → Expected impact