diff --git a/2025/argo-cd/bianbbc87/octocat/Chart.yaml b/2025/argo-cd/bianbbc87/octocat/Chart.yaml
new file mode 100644
index 0000000..59db9e6
--- /dev/null
+++ b/2025/argo-cd/bianbbc87/octocat/Chart.yaml
@@ -0,0 +1,8 @@
+apiVersion: v2 # Helm 3
+name: bianbbc87-study
+version: 0.1.1
+appVersion: 0.1.0
+description: "A Helm chart for deploying bianbbc87's study application with AppProject"
+maintainers:
+  - name: bianbbc87
+    email: bian87@dgu.ac.kr
\ No newline at end of file
diff --git a/2025/argo-cd/bianbbc87/octocat/templates/application.yaml b/2025/argo-cd/bianbbc87/octocat/templates/application.yaml
new file mode 100644
index 0000000..b3d5484
--- /dev/null
+++ b/2025/argo-cd/bianbbc87/octocat/templates/application.yaml
@@ -0,0 +1,21 @@
+# application 리소스를 정의, 어디에 어떤 앱을 어떻게 배포할지 등
+
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: {{ .Values.application.metadata.name }}
+  namespace: {{ .Values.application.metadata.namespace }}
+spec:
+  project: {{ .Values.application.spec.project | default "study" }}
+  source:
+    repoURL: {{ index .Values.project.sourceRepos 0 }}
+    targetRevision: HEAD
+    path: helm-guestbook
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: {{ .Values.application.spec.destination.namespace }}
+  syncPolicy:
+    # 자동 sync
+    automated:
+      prune: true
+      selfHeal: true
\ No newline at end of file
diff --git a/2025/argo-cd/bianbbc87/octocat/templates/project.yaml b/2025/argo-cd/bianbbc87/octocat/templates/project.yaml
new file mode 100644
index 0000000..747b1da
--- /dev/null
+++ b/2025/argo-cd/bianbbc87/octocat/templates/project.yaml
@@ -0,0 +1,23 @@
+# application 그룹화, 정책적 제약 설정
+
+apiVersion: argoproj.io/v1alpha1
+kind: AppProject
+metadata:
+  name: study
+spec:
+  destinations:
+    {{- range .Values.project.destinations }}
+      - namespace: {{ .namespace }}
+        server: {{ .server }}
+    {{- end }}
+  # sourceRepos : 프로젝트에서 허용된 git 저장소 목록
+  sourceRepos:
+    {{- range .Values.project.sourceRepos }}
+    - {{ . }}
+    {{- end }}
+  # deployment와 service만 허용
+  namespaceResourceWhitelist:
+    - group: '*'
+      kind: Service
+    - group: '*'
+      kind: Deployment
\ No newline at end of file
diff --git a/2025/argo-cd/bianbbc87/octocat/values.yaml b/2025/argo-cd/bianbbc87/octocat/values.yaml
new file mode 100644
index 0000000..1d182a3
--- /dev/null
+++ b/2025/argo-cd/bianbbc87/octocat/values.yaml
@@ -0,0 +1,14 @@
+project:
+  sourceRepos:
+    - https://github.com/bianbbc87/argocd-example-apps
+  destinations:
+    - namespace: argocd
+      server: https://kubernetes.default.svc
+
+application:
+  metadata:
+    name: bianbbc87-study
+    namespace: argocd
+  spec:
+    destination:
+      namespace: argocd
\ No newline at end of file
diff --git a/2025/argo-cd/bianbbc87/test-rendered.yaml b/2025/argo-cd/bianbbc87/test-rendered.yaml
new file mode 100644
index 0000000..8c2d2a3
--- /dev/null
+++ b/2025/argo-cd/bianbbc87/test-rendered.yaml
@@ -0,0 +1,44 @@
+---
+# Source: bianbbc87-study/templates/project.yaml
+# application 그룹화, 정책적 제약 설정
+
+apiVersion: argoproj.io/v1alpha1
+kind: AppProject
+metadata:
+  name: study
+spec:
+  destinations:
+      - namespace: argocd
+        server: https://kubernetes.default.svc
+  # sourceRepos : 프로젝트에서 허용된 git 저장소 목록
+  sourceRepos:
+    - https://github.com/bianbbc87/argocd-example-apps
+  # deployment와 service만 허용
+  namespaceResourceWhitelist:
+    - group: '*'
+      kind: Service
+    - group: '*'
+      kind: Deployment
+---
+# Source: bianbbc87-study/templates/application.yaml
+# application 리소스를 정의, 어디에 어떤 앱을 어떻게 배포할지 등
+
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: bianbbc87-study
+  namespace: argocd
+spec:
+  project: study
+  source:
+    repoURL: https://github.com/bianbbc87/argocd-example-apps
+    targetRevision: HEAD
+    path: helm-guestbook
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: argocd
+  syncPolicy:
+    # 자동 sync
+    automated:
+      prune: true
+      selfHeal: true