Worked on the envoyproxy/envoy repository to improve documentation accuracy around HTTP error handling, specifically addressing the behavior when max_headers_count is exceeded. Updated the documentation to clarify that an overflow triggers a 502 Bad Gateway response rather than a 503 Service Unavailable, ensuring that user-facing guidelines match the actual code behavior. This change helps reduce misconfigurations and support requests by aligning expectations with runtime outcomes. The work involved careful review of existing documentation and code, utilizing skills in API design and technical documentation, and required familiarity with proto language conventions to ensure clarity and correctness for users configuring Envoy deployments.