Meter usage and reportable events

We must record and report usage events for the new feature so invoices match real consumption. Instrument the service to emit meter events for each processed event with customer ID, timestamp, event type, and bytes processed. Batch events every minute, validate schema before send, and ensure retry on transient failures so no events are lost. Provide a sample of the first 100 events. Ladder":"L1"

Before I hand the metering spec to the backend team, make it reviewer-friendly: put the required fields for each event at the top, include a typical event JSON for success and one for error cases, show expected batch sizes and acceptable retry behavior, and list three checks a reviewer should run to avoid undercounting or duplicate billing. Ladder":"L2"

Our client library batches meter events and retries on network failure. I’m worried those retries might double-count usage on the billing side. I don’t know whether to make events idempotent, deduplicate server-side, or accept a small error margin. Which approach best prevents billing errors with the least implementation friction and what identifiers or patterns should we include in events to deduplicate reliably? Ladder":"L5"

Across several launches we keep undercounting or double-counting usage because metering is implemented inconsistently by different services. We need a long-term fix so finance trusts the numbers without manual reconciliation. Propose three concrete engineering and process changes: a canonical event schema, an automated test suite or simulator, and a review gate that prevents deployment without passing those checks. Ladder":"L6"