AWS Billing Skill

Analyze AWS billing data with anti-hallucination guardrails and reusable Cost Explorer functions.

Relationship to other AWS skills:

• aws-billing/ → "What to analyze" (anti-hallucination rules, reusable billing functions)
• aws/ → "How to execute" (parallel patterns, throttling, output format)
• aws-pricing/ → "How much things cost" (on-demand pricing via get_aws_cost)

CRITICAL: Billing Data Interpretation Rules (Anti-Hallucination)

These rules are MANDATORY when analyzing AWS billing data. Violating them produces wildly incorrect cost reports.

Rule 1: NET COST Requires the Correct Metric

AWS Cost Explorer exposes 5 cost metrics. The correct default is NetUnblendedCost, which reflects actual charges after all discounts and credits. Never report UnblendedCost alone — it shows charges before negotiated discounts, credits, and RI/SP adjustments.