Worked on enhancing telemetry stability and data privacy in the PostHog/posthog-js repository by addressing ingestion failures related to large base64-encoded images in AI trace events. Applied the existing sanitizeLangChain utility to sanitize both input and output states at capture time, ensuring that oversized base64 data URLs were redacted before telemetry events were ingested. Developed an automated Jest test to verify that redaction was consistently applied, reducing the risk of 413 payload errors and batch drops in telemetry pipelines. Utilized TypeScript and telemetry best practices to align the redaction process with the established generation path, improving data reliability and privacy.