chunk
Threshold above which a scrape response is split into chunked gRPC messages, expressed in kilobytes on input. After resolution, the field is converted in-place to bytes for runtime use; the chunkContentSizeBytes name reflects that final unit.
-1 means "fall back to CHUNK_CONTENT_SIZE_KBS env var, then agent.chunkContentSizeKbs (default 32 KB)". Validated > 0 and that the resulting byte value fits in Int.