Usage Billing Review
Use when reviewing metered usage invoices against usage exports, pricing rules, minimum commitments, credits, customer entitlements, and billing exceptions.
Install
$ agentstack add skill-loopfour-finance-skills-usage-billing-review ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-loopfour-finance-skills-usage-billing-review) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Usage Billing Review
Use this skill to validate usage-based billing before an invoice goes to the customer.
Inputs
- Usage export with customer ID, meter name, period, quantity, unit, and source timestamp.
- Pricing terms, rate cards, tiers, included units, minimum commitments, and overage rules.
- Draft invoice lines.
- Known exceptions such as test accounts, internal usage, credits, outages, or contract overrides.
Workflow
- Confirm the billing period and customer identifiers match across usage, contract, and invoice data.
- Aggregate usage by billable meter and compare it with the invoice.
- Apply pricing rules in this order: included usage, credits, tiering, minimums, overages, discounts, and taxes if provided.
- Flag usage anomalies: sudden spikes, negative usage, duplicate records, missing days, unknown meters, and units that do not match the contract.
- Classify variances by customer impact and materiality.
Output
Return:
- Billing readiness summary: ready, ready with minor cleanup, blocked, or requires approval.
- Meter comparison table with usage quantity, billed quantity, expected charge, invoice charge, variance, and evidence.
- Exception queue with owner and recommended resolution.
- Customer-safe explanation for material usage variance when requested.
Guardrails
- Do not assume internal, test, or failed usage is billable unless source policy says so.
- Do not smooth or alter usage data without preserving the original source values.
- Do not approve billing for unknown meters or unmapped customer IDs.
- Escalate material variances before invoice release.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: loopfour
- Source: loopfour/finance-skills
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.