Incident: On 09/01 at 11:55 PM PST, some users were overcharged due to a system error that counted duplicate entries for 4o minute usage.
Remediation: On 09/02 at 1:30 AM PST, refunds were issued to affected users. These refunds will be processed back to the original payment method within 5-7 business days.
Prevention: We will implement unit tests to cover this failure scenario. Additionally, ensuring billing transparency and reliability is our top priority. To enhance this, we will introduce a Stripe portal where customers can view their monthly usage and a detailed breakdown by provider.