1. Read the workflow and source
Open the complete free skill and authored Markdown download, its inputs and review gates. Read ChatGPT project documentation for current file, plan and privacy limits. Account access is not tested here.
2. Start with approved reference files
Create a separate conversation or project for this one job. Upload the public Markdown as reference if your account supports files. This is not a plugin installation. Do not mix clients or place credentials and private records into a reusable setup instruction.
3. Run the fictional acceptance test
Fictional period: approved usage is 2400 units; invoice has 2250 units at 0.20 each. Report 150 missing units and a 30.00 difference, subject to billing review.
4. Use a narrow request
Use the attached Usage-Based Billing Accuracy Check as reference. Work only on the fictional inputs in the acceptance test. Return Meter | period | expected units | invoiced units | unit difference | amount difference. Show arithmetic and unknowns. Deduplicate events and confirm late-event cutoffs before reporting a discrepancy. Do not treat estimates as charges owed. Do not send, spend, change records or contact anyone.
5. Review before real data
Check each source row, unchanged original value, missing fact and arithmetic. A successful fictional result is a readiness check, not proof of real-account compatibility. Only then use authorized minimum-necessary real exports, confirm retention/access and ask the responsible owner to review the result.
Where this guide stops
No sending, sharing, ledger/CRM changes, account sign-in or spending is authorized by this guide. A separate request and the required approval govern real actions. Keep an evidence copy of the input version and reviewed output.
Checked November 9, 2026. Demand lead follows the published workflow topic; exact guide query volume is unmeasured. AI Agent Skills is independent of the named assistant maker.