FluxCD-optimized Helm charts are Helm packages designed specifically for GitOps workflows with Flux. They include test hooks to validate deployments, post-render templates for Kustomize patches, and value structures that support multi-environment configurations through Git. A FluxCD Helm chart treats values as Git-controllable parameters, not as CLI arguments. It's designed to be updated via Git commits (HelmRelease changes), not manual helm upgrade commands.