HelmRelease is a Flux Kubernetes resource that declaratively manages Helm chart deployments. Instead of running helm install or helm upgrade from the command line, you define a HelmRelease YAML in Git, and Flux's Helm controller automatically installs, upgrades, and manages the chart lifecycle. Example: kind: HelmRelease specifies the chart repo, chart name, version, and values overrides. Flux watches Git, detects changes, and applies them to the cluster automatically.