How to Build a Restartable Node.js Bulk Moderation Job with Cost Tracking

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A structured approach to backfilling customer-support content catalogs recommends building a durable ledger as the core output of any Node.js bulk moderation job, rather than relying on parallel API calls or single large result files. The system ties every classification result to a tenant, policy version, and source item, making the process restartable if interrupted by crashes, rate limits, or deployments. Token usage — both input and output — should be recorded alongside each decision and aggregated by tenant and model to answer operational cost questions per client. Cost in currency must be derived from a versioned rate configuration applied at report time, not hardcoded into historical rows, so that rate changes do not distort past records. Engineers are also warned that a declining average token count may signal harmful truncation rather than cleaner data, and should be cross-checked against review rates and labeled evaluation samples.

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