diff --git a/docs/book/src/cronjob-tutorial/testdata/project/.devcontainer/post-install.sh b/docs/book/src/cronjob-tutorial/testdata/project/.devcontainer/post-install.sh
index 67f3e97ab32..915be088e90 100644
--- a/docs/book/src/cronjob-tutorial/testdata/project/.devcontainer/post-install.sh
+++ b/docs/book/src/cronjob-tutorial/testdata/project/.devcontainer/post-install.sh
@@ -1,19 +1,81 @@
 #!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version
diff --git a/docs/book/src/getting-started/testdata/project/.devcontainer/post-install.sh b/docs/book/src/getting-started/testdata/project/.devcontainer/post-install.sh
index 67f3e97ab32..915be088e90 100644
--- a/docs/book/src/getting-started/testdata/project/.devcontainer/post-install.sh
+++ b/docs/book/src/getting-started/testdata/project/.devcontainer/post-install.sh
@@ -1,19 +1,81 @@
 #!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version
diff --git a/docs/book/src/multiversion-tutorial/testdata/project/.devcontainer/post-install.sh b/docs/book/src/multiversion-tutorial/testdata/project/.devcontainer/post-install.sh
index 67f3e97ab32..915be088e90 100644
--- a/docs/book/src/multiversion-tutorial/testdata/project/.devcontainer/post-install.sh
+++ b/docs/book/src/multiversion-tutorial/testdata/project/.devcontainer/post-install.sh
@@ -1,19 +1,81 @@
 #!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version
diff --git a/pkg/plugins/golang/v4/scaffolds/internal/templates/devcontainer.go b/pkg/plugins/golang/v4/scaffolds/internal/templates/devcontainer.go
index 2a22df963a0..f92d52a46b0 100644
--- a/pkg/plugins/golang/v4/scaffolds/internal/templates/devcontainer.go
+++ b/pkg/plugins/golang/v4/scaffolds/internal/templates/devcontainer.go
@@ -50,19 +50,81 @@ const devContainerTemplate = `{
 const postInstallScript = `#!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version
diff --git a/testdata/project-v4-multigroup/.devcontainer/post-install.sh b/testdata/project-v4-multigroup/.devcontainer/post-install.sh
index 67f3e97ab32..915be088e90 100644
--- a/testdata/project-v4-multigroup/.devcontainer/post-install.sh
+++ b/testdata/project-v4-multigroup/.devcontainer/post-install.sh
@@ -1,19 +1,81 @@
 #!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version
diff --git a/testdata/project-v4-with-plugins/.devcontainer/post-install.sh b/testdata/project-v4-with-plugins/.devcontainer/post-install.sh
index 67f3e97ab32..915be088e90 100644
--- a/testdata/project-v4-with-plugins/.devcontainer/post-install.sh
+++ b/testdata/project-v4-with-plugins/.devcontainer/post-install.sh
@@ -1,19 +1,81 @@
 #!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version
diff --git a/testdata/project-v4/.devcontainer/post-install.sh b/testdata/project-v4/.devcontainer/post-install.sh
index 67f3e97ab32..915be088e90 100644
--- a/testdata/project-v4/.devcontainer/post-install.sh
+++ b/testdata/project-v4/.devcontainer/post-install.sh
@@ -1,19 +1,81 @@
 #!/bin/bash
 set -x
 
+BASHRC_FILE="$HOME/.bashrc"
+
 curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-$(go env GOARCH)
 chmod +x ./kind
 mv ./kind /usr/local/bin/kind
 
+BEGIN_MARKER="# BEGIN kind autocompletion"
+END_MARKER="# END kind autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kind autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kind completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/linux/$(go env GOARCH)
 chmod +x kubebuilder
 mv kubebuilder /usr/local/bin/
 
+BEGIN_MARKER="# BEGIN kubebuilder autocompletion"
+END_MARKER="# END kubebuilder autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubebuilder autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubebuilder completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
 curl -LO "https://dl.k8s.io/release/$KUBECTL_VERSION/bin/linux/$(go env GOARCH)/kubectl"
 chmod +x kubectl
 mv kubectl /usr/local/bin/kubectl
 
+BEGIN_MARKER="# BEGIN kubectl autocompletion"
+END_MARKER="# END kubectl autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# kubectl autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(kubectl completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
+BEGIN_MARKER="# BEGIN docker autocompletion"
+END_MARKER="# END docker autocompletion"
+if ! grep -q "$BEGIN_MARKER" "$BASHRC_FILE"; then
+    echo ""
+    echo "" >> "$BASHRC_FILE"
+    echo "$BEGIN_MARKER" >> "$BASHRC_FILE"
+    echo "# docker autocompletion" >> "$BASHRC_FILE"
+    echo "if [ -f /usr/local/share/bash-completion/bash_completion ]; then" >> "$BASHRC_FILE"
+    echo ". /usr/local/share/bash-completion/bash_completion" >> "$BASHRC_FILE"
+    echo "fi" >> "$BASHRC_FILE"
+    echo ". <(docker completion bash)" >> "$BASHRC_FILE"
+    echo "$END_MARKER" >> "$BASHRC_FILE"
+    echo ""
+fi
+
 docker network create -d=bridge --subnet=172.19.0.0/24 kind
 
 kind version