diff --git a/tasks/pybuild/task.yaml b/tasks/pybuild/task.yaml
index 9ba4ef4..daaf0c6 100644
--- a/tasks/pybuild/task.yaml
+++ b/tasks/pybuild/task.yaml
@@ -8,41 +8,87 @@ spec:
       type: string
       description: Subdirectory within the repo where the source code is located
       default: ""
+
     - name: python-version
       type: string
       description: Python version to use (e.g., 3.9, 3.11)
       default: "3.9"
+
+    - name: pypi-username
+      type: string
+      description: PyPI username (fallback)
+      default: ""
+
+    - name: pypi-password
+      type: string
+      description: PyPI password or token (fallback)
+      default: ""
+
+    - name: pypi-group-url
+      type: string
+      description: PyPI repository URL (install endpoint)
+      default: https://upload.pypi.org/legacy/
+
   workspaces:
     - name: source
       description: Workspace containing the cloned Git repository from git-clone-checkout
+    - name: pypi-auth
+      optional: true
+      description: |
+        A workspace containing authentication credentials for a private PyPI repository.
+        Should include:
+          - username
+          - password
+
   results:
     - name: build-artifact-path
       description: Path to the built artifact directory (e.g., dist/)
+
   steps:
     - name: install-dependencies
       image: python:$(params.python-version)-slim
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -n "$(params.subdirectory)" ]; then
-          cd $(params.subdirectory)
+          cd "$(params.subdirectory)"
         fi
 
         pip install --upgrade pip
-        # Poetry가 있는 경우 설치 및 의존성 처리
+
+        PYPI_USER="$(params.pypi-username)"
+        PYPI_PASS="$(params.pypi-password)"
+        PYPI_URL="$(params.pypi-group-url)"
+
+        if [ -f /workspace/pypi-auth/username ]; then
+          PYPI_USER=$(cat /workspace/pypi-auth/username)
+        fi
+        if [ -f /workspace/pypi-auth/password ]; then
+          PYPI_PASS=$(cat /workspace/pypi-auth/password)
+        fi
+
         if [ -f pyproject.toml ]; then
-          echo "Detected Poetry project (pyproject.toml found)"
+          echo "[INFO] Poetry project detected"
           pip install poetry
           poetry config virtualenvs.in-project true
+
+          if [ -n "$PYPI_URL" ]; then
+            REPO_NAME=$(echo "$PYPI_URL" | sed -E 's#https?://([^/]+)/repository/([^/]+)/?.*#\1_\2#' | tr -cd '[:alnum:]_')
+            echo "[INFO] Configuring poetry source '$REPO_NAME' → $PYPI_URL"
+            poetry config repositories."$REPO_NAME" "$PYPI_URL"
+            poetry config http-basic."$REPO_NAME" "$PYPI_USER" "$PYPI_PASS"
+          fi
+
           poetry install --no-root
-        # Pip fallback (requirements.txt 및 setup.py)
+
         elif [ -f requirements.txt ] && [ -f setup.py ]; then
-          echo "Detected Pip project (requirements.txt and setup.py found)"
+          echo "[INFO] Pip + setup.py project detected"
           pip install -r requirements.txt
           pip install build
         else
-          echo "Error: No valid build configuration found (pyproject.toml or setup.py required)"
+          echo "[ERROR] No valid build configuration found (pyproject.toml or setup.py required)"
           exit 1
         fi
 
@@ -51,39 +97,39 @@ spec:
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -n "$(params.subdirectory)" ]; then
-          cd $(params.subdirectory)
+          cd "$(params.subdirectory)"
         fi
 
-        # Poetry가 사용된 경우
         if [ -f pyproject.toml ]; then
           poetry build
-          echo "Built artifacts located in dist/"
-          ls -l dist/
-        # Pip 및 setup.py 사용
         elif [ -f setup.py ]; then
           python -m build
-          echo "Built artifacts located in dist/"
-          ls -l dist/
         else
-          echo "Error: No build tool available"
+          echo "[ERROR] No build tool available"
           exit 1
         fi
 
-        # 빌드 결과 경로를 결과로 저장
+        echo "Built artifacts located in dist/"
+        ls -l dist/
+
+        # Save result path
         echo -n "/workspace/source/$(params.subdirectory)/dist" > /tekton/results/build-artifact-path
+
     - name: verify-build
       image: ubuntu
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         DIST_PATH=$(cat /tekton/results/build-artifact-path)
         if [ -d "$DIST_PATH" ] && [ -n "$(ls -A $DIST_PATH)" ]; then
-          echo "Build artifacts successfully created in $DIST_PATH:"
+          echo "✅ Build artifacts successfully created in $DIST_PATH:"
           ls -l $DIST_PATH
         else
-          echo "Error: No build artifacts found in $DIST_PATH"
+          echo "❌ No build artifacts found in $DIST_PATH"
           exit 1
         fi
diff --git a/tasks/pylint/task.yaml b/tasks/pylint/task.yaml
index d35e48f..2280f37 100644
--- a/tasks/pylint/task.yaml
+++ b/tasks/pylint/task.yaml
@@ -8,44 +8,90 @@ spec:
       type: string
       description: Subdirectory within the repo where the source code is located
       default: ""
+
     - name: python-version
       type: string
       description: Python version to use (e.g., 3.9, 3.11)
       default: "3.9"
+
     - name: pylint-args
       type: string
       description: Additional arguments for pylint (e.g., --fail-under=8)
       default: ""
+
+    - name: pypi-username
+      type: string
+      description: PyPI username (fallback)
+      default: ""
+
+    - name: pypi-password
+      type: string
+      description: PyPI password or token (fallback)
+      default: ""
+
+    - name: pypi-group-url
+      type: string
+      description: PyPI repository URL (install endpoint)
+      default: https://upload.pypi.org/legacy/
+
   workspaces:
     - name: source
       description: Workspace containing the cloned Git repository from git-clone-checkout
+
+    - name: pypi-auth
+      optional: true
+      description: |
+        A workspace containing authentication credentials for a private PyPI repository.
+        Should include:
+          - username
+          - password
+
   steps:
     - name: install-dependencies
       image: python:$(params.python-version)-slim
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -n "$(params.subdirectory)" ]; then
-          cd $(params.subdirectory)
+          cd "$(params.subdirectory)"
         fi
 
         pip install --upgrade pip
 
-        # Poetry가 있는 경우 설치 및 의존성 처리
+        PYPI_USER="$(params.pypi-username)"
+        PYPI_PASS="$(params.pypi-password)"
+        PYPI_URL="$(params.pypi-group-url)"
+
+        if [ -f /workspace/pypi-auth/username ]; then
+          PYPI_USER=$(cat /workspace/pypi-auth/username)
+        fi
+        if [ -f /workspace/pypi-auth/password ]; then
+          PYPI_PASS=$(cat /workspace/pypi-auth/password)
+        fi
+
         if [ -f pyproject.toml ]; then
-          echo "Detected Poetry project (pyproject.toml found)"
+          echo "[INFO] Poetry project detected"
+
           pip install poetry
           poetry config virtualenvs.in-project true
+
+          if [ -n "$PYPI_URL" ]; then
+            REPO_NAME=$(echo "$PYPI_URL" | sed -E 's#https?://([^/]+)/repository/([^/]+)/?.*#\1_\2#' | tr -cd '[:alnum:]_')
+            echo "[INFO] Configuring poetry source '$REPO_NAME' with URL: $PYPI_URL"
+            poetry config repositories."$REPO_NAME" "$PYPI_URL"
+            poetry config http-basic."$REPO_NAME" "$PYPI_USER" "$PYPI_PASS"
+          fi
+
           poetry install --no-root
-          poetry add pylint --group dev  # Pylint를 개발 의존성으로 추가
-        # Pip fallback (requirements.txt)
+          poetry add pylint --group dev
         elif [ -f requirements.txt ]; then
-          echo "Detected Pip project (requirements.txt found)"
+          echo "[INFO] Pip project detected"
           pip install -r requirements.txt
           pip install pylint
         else
-          echo "No dependency file found, installing pylint only"
+          echo "[INFO] No dependency file found, installing pylint only"
           pip install pylint
         fi
 
@@ -54,24 +100,22 @@ spec:
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -n "$(params.subdirectory)" ]; then
-          cd $(params.subdirectory)
+          cd "$(params.subdirectory)"
         fi
 
-        # Poetry가 사용된 경우 가상환경에서 실행
         if [ -f pyproject.toml ]; then
           poetry run pylint $(params.pylint-args) .
         else
           pylint $(params.pylint-args) .
         fi
-      onError: continue  # 린트 실패 시에도 파이프라인을 중단하지 않음 (선택적)
+      onError: continue  # 린트 실패해도 실패로 간주하지 않음
 
     - name: check-results
       image: ubuntu
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
-
         echo "Pylint execution completed."
-        # Pylint 결과를 별도 파일로 저장하려면 run-lint에서 --output 옵션 추가 필요
diff --git a/tasks/pypi/task.yaml b/tasks/pypi/task.yaml
index 540c437..4f11cda 100644
--- a/tasks/pypi/task.yaml
+++ b/tasks/pypi/task.yaml
@@ -7,38 +7,83 @@ spec:
     - name: build-artifact-path
       type: string
       description: Path to the built artifact directory from python-build
+
     - name: python-version
       type: string
       description: Python version to use (e.g., 3.9, 3.11)
       default: "3.9"
+
     - name: pypi-username
       type: string
-      description: PyPI username (e.g., __token__ for token-based auth)
+      description: PyPI username (fallback)
+      default: ""
+
     - name: pypi-password
       type: string
-      description: PyPI password or token
-    - name: pypi-repository-url
+      description: PyPI password or token (fallback)
+      default: ""
+
+    - name: pypi-hosted-url
       type: string
-      description: PyPI repository URL
+      description: PyPI repository URL (upload endpoint)
       default: https://upload.pypi.org/legacy/
+
+    - name: pypi-group-url
+      type: string
+      description: PyPI repository URL (install endpoint)
+      default: https://upload.pypi.org/legacy/
+
   workspaces:
     - name: source
       description: Workspace containing the built artifacts
+    - name: pypi-auth
+      optional: true
+      description: |
+        Optional workspace containing:
+        - username
+        - password
+
   steps:
     - name: upload-to-pypi
       image: python:$(params.python-version)-slim
+      workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
-        pip install twine
+        pip install --upgrade pip
+        pip install poetry twine
+
+        # 기본값 (params)
+        TWINE_USERNAME="$(params.pypi-username)"
+        TWINE_PASSWORD="$(params.pypi-password)"
+        HOSTED_URL="$(params.pypi-hosted-url)"
+        GROUP_URL="$(params.pypi-group-url)"
+
+        # pypi-auth workspace에 있으면 override
+        if [ -f /workspace/pypi-auth/username ]; then
+          TWINE_USERNAME=$(cat /workspace/pypi-auth/username)
+        fi
+        if [ -f /workspace/pypi-auth/password ]; then
+          TWINE_PASSWORD=$(cat /workspace/pypi-auth/password)
+        fi
+
+        echo "[INFO] Twine Upload URL: $HOSTED_URL"
+
+        # poetry config (install용 group-url 사용)
+        if [ -f pyproject.toml ]; then
+          REPO_NAME=$(echo "$GROUP_URL" | sed -E 's#https?://([^/]+)/repository/([^/]+)/?.*#\1_\2#' | tr -cd '[:alnum:]_')
+          echo "[INFO] Configuring poetry install repo: $REPO_NAME -> $GROUP_URL"
+
+          poetry config repositories."$REPO_NAME" "$GROUP_URL"
+          poetry config http-basic."$REPO_NAME" "$TWINE_USERNAME" "$TWINE_PASSWORD"
+        fi
+
+        echo "[INFO] Uploading artifacts with Twine..."
         twine upload \
-          --repository-url "$(params.pypi-repository-url)" \
-          --username "$(params.pypi-username)" \
-          --password "$(params.pypi-password)" \
+          --repository-url "$HOSTED_URL" \
+          --username "$TWINE_USERNAME" \
+          --password "$TWINE_PASSWORD" \
           "$(params.build-artifact-path)"/*
-        if [ $? -eq 0 ]; then
-          echo "Successfully uploaded to PyPI"
-        else
-          echo "Failed to upload to PyPI"
-          exit 1
-        fi
\ No newline at end of file
+
+        echo "[INFO] Successfully uploaded to PyPI"
diff --git a/tasks/pytest/task.yaml b/tasks/pytest/task.yaml
index 969692f..aa77712 100644
--- a/tasks/pytest/task.yaml
+++ b/tasks/pytest/task.yaml
@@ -7,34 +7,82 @@ spec:
     - name: subdirectory
       type: string
       description: Subdirectory within the workspace where the tests are located
-      default: ""  # 기본값을 빈 문자열로 설정, 필요 시 repo로 변경
+      default: ""
+
     - name: python-version
       type: string
       description: Python version to use (e.g., 3.9, 3.11)
       default: "3.9"
+
+    - name: pypi-username
+      type: string
+      description: PyPI username (fallback)
+      default: ""
+
+    - name: pypi-password
+      type: string
+      description: PyPI password or token (fallback)
+      default: ""
+
+    - name: pypi-group-url
+      type: string
+      description: PyPI repository URL (install endpoint)
+      default: https://upload.pypi.org/legacy/
+
   workspaces:
     - name: source
       description: Workspace containing the cloned Git repository from git-clone-checkout
+
+    - name: pypi-auth
+      optional: true
+      description: |
+        A workspace containing authentication credentials for a private PyPI repository.
+        Should include:
+          - username
+          - password
+
   steps:
     - name: install-dependencies
       image: python:$(params.python-version)-slim
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -n "$(params.subdirectory)" ]; then
-          cd $(params.subdirectory)
+          cd "$(params.subdirectory)"
         fi
 
         pip install --upgrade pip
         pip install pytest
 
         if [ -f pyproject.toml ]; then
+          echo "[INFO] Using Poetry to install dependencies"
           pip install poetry
           poetry config virtualenvs.in-project true
           poetry lock --no-cache --regenerate
+
+          PYPI_USER="$(params.pypi-username)"
+          PYPI_PASS="$(params.pypi-password)"
+          PYPI_URL="$(params.pypi-group-url)"
+
+          if [ -f /workspace/pypi-auth/username ]; then
+            PYPI_USER=$(cat /workspace/pypi-auth/username)
+          fi
+          if [ -f /workspace/pypi-auth/password ]; then
+            PYPI_PASS=$(cat /workspace/pypi-auth/password)
+          fi
+
+          if [ -n "$PYPI_URL" ]; then
+            REPO_NAME=$(echo "$PYPI_URL" | sed -E 's#https?://([^/]+)/repository/([^/]+)/?.*#\1_\2#' | tr -cd '[:alnum:]_')
+            echo "[INFO] Configuring poetry source '$REPO_NAME': $PYPI_URL"
+            poetry config repositories."$REPO_NAME" "$PYPI_URL"
+            poetry config http-basic."$REPO_NAME" "$PYPI_USER" "$PYPI_PASS"
+          fi
+
           poetry install --no-root
         elif [ -f requirements.txt ]; then
+          echo "[INFO] Using pip to install dependencies"
           pip install -r requirements.txt
         fi
 
@@ -43,9 +91,10 @@ spec:
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -n "$(params.subdirectory)" ]; then
-          cd $(params.subdirectory)
+          cd "$(params.subdirectory)"
         fi
 
         if [ -f pyproject.toml ]; then
@@ -60,6 +109,7 @@ spec:
       workingDir: /workspace/source
       script: |
         #!/usr/bin/env bash
+        set -e
 
         if [ -f pytest-results.xml ]; then
           echo "Test results generated: pytest-results.xml"
@@ -67,4 +117,4 @@ spec:
         else
           echo "No test results found."
           exit 1
-        fi
\ No newline at end of file
+        fi