diff --git a/README.md b/README.md
index e0119ae..e989a0d 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,8 @@ This repository manages two Helm charts (e.g., `code-server-chart`, `vllm-serve`
 
 ## How it works
 
-- Local pre-push hook runs `scripts/helm_publish.sh` to `helm package` and `helm push` all charts found under this folder (directories containing a `Chart.yaml`).
-  - If any chart fails to package/push, the Git push is aborted.
+- Local pre-push hook runs `scripts/helm_publish.sh` and only processes charts that changed relative to the branch upstream (initial push publishes all charts).
+  - If any processed chart fails to package/push, the Git push is aborted.
 
 ## Configure registry
 
@@ -28,11 +28,7 @@ HELM_LOGIN_EXTRA_ARGS="--insecure --plain-http"
 
 No configuration needed by default. The script auto-discovers chart directories by looking for `Chart.yaml` up to depth 2 (excluding nested `charts/` vendor dir).
 
-Optionally pin which chart directories to process:
-
-```
-export CHART_DIRS="code-server-chart vllm-serve"
-```
+By default you don't need to set `CHART_DIRS`; the hook processes only the charts that changed.
 
 ## Run manually