diff --git a/README.md b/README.md
index a3e68c3..3cc31ff 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,9 @@ poetry run ruff format src/ tests/
 
 # Type checking
 poetry run mypy src/
+
+Note: The file `py.typed`  has added to the package and specified in pyproject.toml to ensure mypy treats 
+tkseal as a typed package and avoids "Skipping analyzing 'tkseal': found module but no type hints or library stubs" warnings.
 ```
 
 ## Available Commands
@@ -63,7 +66,48 @@ poetry run mypy src/
 - 💻 `tkseal seal PATH` - Convert plain_secrets.json to sealed_secrets.json
 - 
 
-## Previous logic documentation
+## Logic documentation
+
+### Forbidden Secrets Warning
+
+  **Core Functionality**
+
+  This application allows users to pull different kinds of Kubernetes secrets into their local Tanka environment. 
+  However, certain types of secrets are considered forbidden for pulling due to their sensitive nature or 
+  system management roles. 
+  
+  The pull command includes the `forbidden secrets warning` feature that prevents accidental exposure of sensitive 
+  system secrets while keeping users informed about what's being filtered out when pulling secrets from a Kubernetes
+  namespace into a local Tanka environment using the `tkseal pull` command.
+
+  **Implementation Details**
+
+  The detection method involves checking the types of secrets present in the specified Kubernetes namespace against 
+  a predefined list of forbidden secret types. These forbidden types typically include:
+
+  - `kubernetes.io/service-account-token`
+  - `helm.sh/release.v1`
+  - Any other secret types deemed sensitive or system-managed
+  - The forbidden and allowed secret types are defined in `/src/tkseal/configuration.py` 
+
+  The implementation uses the following logic:
+
+  1. Fetch all secrets from the specified Kubernetes namespace using `kubectl`.
+  2. Iterate through each secret and check its type.
+  3. If a secret's type matches any in the forbidden list, it is flagged.
+  4. Collect all flagged secrets and prepare a warning message.
+
+  **Usage Example**
+  When a user runs `tkseal pull`, if there are forbidden secrets (like service-account-tokens, helm releases, etc.) 
+  in the namespace:
+
+  `tkseal pull environments/testing/`
+
+  This shows how "plain_secrets.json" would change based on what's in the Kubernetes cluster
+
+  `⚠ Warning: Found forbidden secrets in namespace that cannot be pulled:
+    - default-token-abc (type: kubernetes.io/service-account-token)
+    - helm-release-v1 (type: helm.sh/release.v1)`
 
 ### ready Command
 
@@ -196,5 +240,3 @@ The command will:
 2. Display diff of what would change
 3. Ask for confirmation
 4. Seal secrets to sealed_secrets.json
-
-
diff --git a/poetry.lock b/poetry.lock
index 923e0ee..dabd61e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -30,104 +30,104 @@ markers = {main = "platform_system == \"Windows\"", dev = "sys_platform == \"win
 
 [[package]]
 name = "coverage"
-version = "7.11.0"
+version = "7.11.1"
 description = "Code coverage measurement for Python"
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
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+    {file = "coverage-7.11.1-cp314-cp314t-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl", hash = "sha256:28ad84c694fa86084cfd3c1eab4149844b8cb95bd8e5cbfc4a647f3ee2cce2b3"},
+    {file = "coverage-7.11.1-cp314-cp314t-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:b1043ff958f09fc3f552c014d599f3c6b7088ba97d7bc1bd1cce8603cd75b520"},
+    {file = "coverage-7.11.1-cp314-cp314t-manylinux_2_31_riscv64.manylinux_2_39_riscv64.whl", hash = "sha256:c6681add5060c2742dafcf29826dff1ff8eef889a3b03390daeed84361c428bd"},
+    {file = "coverage-7.11.1-cp314-cp314t-musllinux_1_2_aarch64.whl", hash = "sha256:773419b225ec9a75caa1e941dd0c83a91b92c2b525269e44e6ee3e4c630607db"},
+    {file = "coverage-7.11.1-cp314-cp314t-musllinux_1_2_i686.whl", hash = "sha256:a9cb272a0e0157dbb9b2fd0b201b759bd378a1a6138a16536c025c2ce4f7643b"},
+    {file = "coverage-7.11.1-cp314-cp314t-musllinux_1_2_riscv64.whl", hash = "sha256:e09adb2a7811dc75998eef68f47599cf699e2b62eed09c9fefaeb290b3920f34"},
+    {file = "coverage-7.11.1-cp314-cp314t-musllinux_1_2_x86_64.whl", hash = "sha256:1335fa8c2a2fea49924d97e1e3500cfe8d7c849f5369f26bb7559ad4259ccfab"},
+    {file = "coverage-7.11.1-cp314-cp314t-win32.whl", hash = "sha256:4782d71d2a4fa7cef95e853b7097c8bbead4dbd0e6f9c7152a6b11a194b794db"},
+    {file = "coverage-7.11.1-cp314-cp314t-win_amd64.whl", hash = "sha256:939f45e66eceb63c75e8eb8fc58bb7077c00f1a41b0e15c6ef02334a933cfe93"},
+    {file = "coverage-7.11.1-cp314-cp314t-win_arm64.whl", hash = "sha256:01c575bdbef35e3f023b50a146e9a75c53816e4f2569109458155cd2315f87d9"},
+    {file = "coverage-7.11.1-py3-none-any.whl", hash = "sha256:0fa848acb5f1da24765cee840e1afe9232ac98a8f9431c6112c15b34e880b9e8"},
+    {file = "coverage-7.11.1.tar.gz", hash = "sha256:b4b3a072559578129a9e863082a2972a2abd8975bc0e2ec57da96afcd6580a8a"},
 ]
 
 [package.extras]
diff --git a/pyproject.toml b/pyproject.toml
index 0b3105f..c28f65a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ description = "A command-line utility for managing sealed secrets in Kubernetes
 readme = "README.md"
 authors = ["K'Ron Spar <kspar@umich.edu>", "Lianet Sepulveda Torres <lisepul@umich.edu>"]
 packages = [{include = "tkseal", from = "src"}]
+include = ["src/tkseal/py.typed"]
 keywords = ["kubernetes", "secrets", "sealed-secrets", "tanka", "k8s"]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -73,6 +74,8 @@ ignore = [
   line-ending = "auto"
 
 [tool.mypy]
+mypy_path = "src"
+files = "src/tkseal"
 python_version = "3.12"
 warn_return_any = true
 warn_unused_configs = true
diff --git a/src/tkseal/cli.py b/src/tkseal/cli.py
index f2588de..3f9c2f0 100644
--- a/src/tkseal/cli.py
+++ b/src/tkseal/cli.py
@@ -89,16 +89,25 @@ def pull(path: str) -> None:
         # Create SecretState from path
         secret_state = SecretState.from_path(path)
 
+        # Create Pull instance and show differences
+        pull_obj = Pull(secret_state)
+        result = pull_obj.run()
+
+        # Check and warn about forbidden secrets
+        forbidden_secrets = secret_state.get_forbidden_secrets()
+        if forbidden_secrets:
+            click.secho(
+                "\nThese secrets are system-managed and will not be included in plain_secrets.json:",
+                fg="yellow",
+            )
+            for secret in forbidden_secrets:
+                click.secho(f"  - {secret.name} (type: {secret.type})", fg="yellow")
+
         # Show informational message
         click.secho(
             'This shows how "plain_secrets.json" would change based on what\'s in the Kubernetes cluster',
             fg="yellow",
         )
-
-        # Create Pull instance and show differences
-        pull_obj = Pull(secret_state)
-        result = pull_obj.run()
-
         # Display diff results
         if result.has_differences:
             click.echo(result.diff_output)
@@ -130,26 +139,26 @@ def seal(path: str) -> None:
         secret_state = SecretState.from_path(path)
 
         # Show informational message
-        click.secho(
-            'This shows what would change in the cluster based on "plain_secrets.json"',
-            fg="yellow",
-        )
+        # click.secho(
+        #    'This shows what would change in the cluster based on "plain_secrets.json"',
+        #    fg="yellow",
+        # )
 
         # Show diff to preview changes
-        diff_obj = Diff(secret_state)
-        result = diff_obj.plain()
+        # diff_obj = Diff(secret_state)
+        # result = diff_obj.plain()
 
         # Display diff results
-        if result.has_differences:
-            click.echo(result.diff_output)
-
-            # Confirm before sealing
-            if click.confirm("Are you sure?"):
-                seal_obj = Seal(secret_state)
-                seal_obj.run()
-                click.echo("Successfully sealed secrets to sealed_secrets.json")
-        else:
-            click.echo("No differences")
+        # if result.has_differences:
+        #    click.echo(result.diff_output)
+
+        # Confirm before sealing
+        if click.confirm("Are you sure?"):
+            seal_obj = Seal(secret_state)
+            seal_obj.run()
+            click.echo("Successfully sealed secrets to sealed_secrets.json")
+        # else:
+        #    click.echo("No differences")
 
     except TKSealError as e:
         click.echo(f"Error: {e}", err=True)
diff --git a/src/tkseal/configuration.py b/src/tkseal/configuration.py
index 9d48cbd..cb76517 100644
--- a/src/tkseal/configuration.py
+++ b/src/tkseal/configuration.py
@@ -13,3 +13,24 @@
 
 # File name for sealed (encrypted) secrets JSON file
 SEALED_SECRETS_FILE = "sealed_secrets.json"
+
+# Allowed secret types that tkseal can manage
+MANAGED_SECRET_TYPES = {
+    "Opaque",  # Standard application secrets
+    "kubernetes.io/basic-auth",  # HTTP basic auth
+    "kubernetes.io/ssh-auth",  # SSH keys
+}
+
+# Allowed secret types that tkseal can manage but with extra caution - showing warnings in the CLI
+MANAGED_SECRET_CAREFULLY_TYPES = {
+    "kubernetes.io/dockerconfigjson",  # Docker registry credentials. Users manage all these secrets manually,
+    # so is safe to handle by tkseal.
+}
+
+# Never allow these (system-managed, high risk)
+FORBIDDEN_SECRET_TYPES = {
+    "kubernetes.io/service-account-token",  # Cluster API tokens
+    "bootstrap.kubernetes.io/token",  # Bootstrap tokens
+    "helm.sh/release.v1",  # Helm release data
+    "kubernetes.io/tls",  # TLS certificates
+}
diff --git a/src/tkseal/kubectl.py b/src/tkseal/kubectl.py
index b27d0c2..58de41f 100644
--- a/src/tkseal/kubectl.py
+++ b/src/tkseal/kubectl.py
@@ -1,4 +1,5 @@
 import shutil
+
 import yaml
 
 from tkseal.exceptions import TKSealError
@@ -48,4 +49,4 @@ def get_secrets(context: str, namespace: str) -> dict:
         try:
             return yaml.safe_load(output)
         except yaml.YAMLError as e:
-            raise TKSealError(f"Failed to parse secrets YAML: {str(e)}") from e
\ No newline at end of file
+            raise TKSealError(f"Failed to parse secrets YAML: {str(e)}") from e
diff --git a/src/tkseal/kubeseal.py b/src/tkseal/kubeseal.py
index 902789f..9b47888 100644
--- a/src/tkseal/kubeseal.py
+++ b/src/tkseal/kubeseal.py
@@ -27,17 +27,17 @@ def seal(context: str, namespace: str, name: str, value: str) -> str:
         """
         # Construct kubeseal command
         cmd = [
-                "kubeseal",
-                "--raw",
-                "--namespace",
-                namespace,
-                "--name",
-                name,
-                "--context",
-                context,
+            "kubeseal",
+            "--raw",
+            "--namespace",
+            namespace,
+            "--name",
+            name,
+            "--context",
+            context,
         ]
 
         # Execute kubeseal command with value piped via stdin
         result = run_command(cmd, value=value)
 
-        return result
\ No newline at end of file
+        return result
diff --git a/src/tkseal/py.typed b/src/tkseal/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/src/tkseal/seal.py b/src/tkseal/seal.py
index 69b4ae1..4b9c73b 100644
--- a/src/tkseal/seal.py
+++ b/src/tkseal/seal.py
@@ -2,6 +2,8 @@
 
 import json
 
+from tkseal import TKSealError
+from tkseal.configuration import PLAIN_SECRETS_FILE
 from tkseal.kubeseal import KubeSeal
 from tkseal.secret_state import SecretState
 
@@ -56,7 +58,17 @@ def run(self) -> None:
         """
         # Read and parse plain secrets
         plain_secrets_text = self.secret_state.plain_secrets()
-        plain_secrets = json.loads(plain_secrets_text)
+
+        # Check if plain_secrets_text is empty or exists
+        if not plain_secrets_text or plain_secrets_text.strip() == "":
+            raise TKSealError(
+                f"No plain secrets found. Please create {PLAIN_SECRETS_FILE} "
+                f"or run 'tkseal pull' first."
+            )
+        try:
+            plain_secrets = json.loads(plain_secrets_text)
+        except json.decoder.JSONDecodeError as e:
+            raise TKSealError(f"Invalid JSON in {PLAIN_SECRETS_FILE}: {str(e)}") from e
 
         # Process each secret
         sealed_secrets = []
@@ -79,7 +91,9 @@ def run(self) -> None:
                         "metadata": {
                             "name": secret["name"],
                             "namespace": self.secret_state.namespace,
-                        }
+                        },
+                        # Preserve secret type if specified in plain_secrets.json
+                        **({"type": secret["type"]} if "type" in secret else {}),
                     },
                     "encryptedData": encrypted_data,
                 },
diff --git a/src/tkseal/secret.py b/src/tkseal/secret.py
index 535be45..c0cd7d5 100644
--- a/src/tkseal/secret.py
+++ b/src/tkseal/secret.py
@@ -4,6 +4,11 @@
 from typing import Any, cast
 
 from tkseal import TKSealError
+from tkseal.configuration import (
+    FORBIDDEN_SECRET_TYPES,
+    MANAGED_SECRET_CAREFULLY_TYPES,
+    MANAGED_SECRET_TYPES,
+)
 from tkseal.kubectl import KubeCtl
 from tkseal.tk import TKEnvironment
 
@@ -36,14 +41,44 @@ def data(self) -> list[SecretDataPair]:
             )
         return result
 
+    @property
+    def type(self) -> str:
+        return cast(str, self._raw.get("type", ""))
+
+
+class ForbiddenSecret(Secret):
+    """Represents a secret that are not allowed to pull or process due to security policies."""
+
+    def __init__(self, raw: dict[str, Any]):
+        super().__init__(raw)
+
+    @property
+    def data(self) -> list[SecretDataPair]:
+        """Forbidden secrets do not expose data, so accessing this raises an error."""
+        raise TKSealError(
+            f'Forbidden secret "{self.name}" data cannot be accessed or sealed'
+        )
+
 
 class Secrets:
+    # Security check: prevent processing of forbidden types
+    # Store forbidden secrets for reporting - [{"secret1":"kubernetes.io/service-account-token"}]
+    forbidden_secrets: list[ForbiddenSecret]
+
     def __init__(self, raw_secrets: dict[str, Any]):
         """Initialize Secrets from YAML-parsed kubectl output format.
         Args:
             raw_secrets: kubectl output dict with 'items' key
         Raises:
             TKSealError: If raw_secrets does not have the items key
+
+        Secret type - Filtering Strategy (to be implemented):
+
+          1. Default to Opaque only (safest, matches Ruby)
+          2. Add explicit allow-list for basic-auth and ssh-auth
+          3. Add explicit deny-list for service-account-token and bootstrap tokens
+          4. Raise error if user tries to include forbidden types (fail-safe)
+          5. Log warning when filtering secrets (visibility)
         """
 
         # Handle kubectl format with the "items" key
@@ -53,7 +88,16 @@ def __init__(self, raw_secrets: dict[str, Any]):
                 f"Got keys: {list(raw_secrets.keys())}"
             )
 
-        self.items = [Secret(raw) for raw in raw_secrets["items"]]
+        self.allowed_types = MANAGED_SECRET_TYPES.union(MANAGED_SECRET_CAREFULLY_TYPES)
+
+        self.forbidden_secrets = Secrets.get_forbidden_secrets(raw_secrets)
+
+        # TODO: If the secret does not have type, assume "Opaque" (Kubernetes default)
+        self.items = [
+            Secret(raw)
+            for raw in raw_secrets["items"]
+            if raw.get("type", "Opaque") in self.allowed_types
+        ]
 
     @classmethod
     def for_tk_env(cls, path: str) -> "Secrets":
@@ -72,6 +116,23 @@ def for_tk_env(cls, path: str) -> "Secrets":
         raw_secrets = KubeCtl.get_secrets(context=env.context, namespace=env.namespace)
         return cls(raw_secrets)
 
+    @staticmethod
+    def get_forbidden_secrets(
+        raw_secrets: dict[str, Any],
+    ) -> list[ForbiddenSecret]:
+        """Create a list of ForbiddenSecret objects.
+
+        Args:
+            raw_secrets: kubectl output dict with 'items' key
+        Returns:
+            List of secrets with forbidden types
+        """
+        filtered_items: list[ForbiddenSecret] = []
+        for raw in raw_secrets.get("items", []):
+            if raw.get("type") in FORBIDDEN_SECRET_TYPES:
+                filtered_items.append(ForbiddenSecret(raw))
+        return filtered_items
+
     def to_json(self) -> str:
         """Convert secrets to JSON format with decoded plain values.
 
@@ -91,6 +152,7 @@ def to_json(self) -> str:
             secret_dict = {
                 "name": secret.name,
                 "data": {pair.key: pair.plain_value for pair in secret.data},
+                "type": secret.type,
             }
             output.append(secret_dict)
         return json.dumps(output, indent=2)
diff --git a/src/tkseal/secret_state.py b/src/tkseal/secret_state.py
index 2684e05..0dc377b 100644
--- a/src/tkseal/secret_state.py
+++ b/src/tkseal/secret_state.py
@@ -8,9 +8,10 @@
 
 import os
 from pathlib import Path
+from typing import cast
 
 from tkseal import configuration
-from tkseal.secret import Secrets
+from tkseal.secret import ForbiddenSecret, Secrets
 from tkseal.tk import TKEnvironment
 
 
@@ -59,6 +60,8 @@ def __init__(
         self.plain_secrets_file_path = plain_secrets_file_path
         self.sealed_secrets_file_path = sealed_secrets_file_path
         self._tk_env = tk_env
+        # Optional[Secrets] signifying the absence of the secrets_cache data until it is needed and loaded
+        self._secrets_cache: Secrets | None = None  # Cache for the Secrets object
 
     @classmethod
     def from_path(cls, path: str) -> "SecretState":
@@ -141,5 +144,28 @@ def kube_secrets(self) -> str:
         Raises:
             TKSealError: If there's an error retrieving secrets from cluster
         """
-        secrets = Secrets.for_tk_env(self.tk_env_path)
-        return secrets.to_json()
+        # Cache the Secrets object for access to forbidden_secrets and to avoid multiple cluster queries
+        if self._secrets_cache is None:
+            # Create Secrets object from the Tanka environment
+            self._secrets_cache = Secrets.for_tk_env(self.tk_env_path)
+        # Return the JSON representation of the secrets that is the entry point of other methods
+
+        assert self._secrets_cache is not None
+        return cast(str, self._secrets_cache.to_json())
+
+    def get_forbidden_secrets(self) -> list[ForbiddenSecret]:
+        """Get list of forbidden secrets that exist in the namespace but cannot be pulled.
+
+        Returns:
+            list[ForbiddenSecret]: List of a forbidden secret object.
+
+        Note:
+            This method requires kube_secrets() to be called first to populate the cache.
+            If kube_secrets() hasn't been called, this will trigger a cluster query.
+        """
+        # Ensure secrets are loaded
+        if self._secrets_cache is None:
+            self.kube_secrets()  # This will populate _secrets_cache
+
+        assert self._secrets_cache is not None
+        return self._secrets_cache.forbidden_secrets
diff --git a/src/tkseal/tk.py b/src/tkseal/tk.py
index 0d3f2bb..1b46148 100644
--- a/src/tkseal/tk.py
+++ b/src/tkseal/tk.py
@@ -2,7 +2,6 @@
 import re
 import shutil
 
-
 from tkseal.exceptions import TKSealError
 from tkseal.tkseal_utils import run_command
 
@@ -57,6 +56,7 @@ def status(path: str) -> str:
         cmd = ["tk", "status", path]
         result = run_command(cmd)
         return result
+
     @property
     def context(self) -> str:
         """Extract Kubernetes context from tk status output"""
@@ -73,7 +73,7 @@ def namespace(self) -> str:
             raise TKSealError("Namespace not found in tk status output")
         return namespace
 
-    def _get_val(self, key: str) -> str | None:
+    def _get_val(self, key: str) -> str:
         """
         Helper to extract values from tk status output lines.
 
@@ -88,4 +88,4 @@ def _get_val(self, key: str) -> str | None:
         for line in self._status_lines:
             if match := re.match(pattern, line):
                 return match.group(1)
-        return None
+        return ""
diff --git a/src/tkseal/tkseal_utils.py b/src/tkseal/tkseal_utils.py
index a8b97f2..d253146 100644
--- a/src/tkseal/tkseal_utils.py
+++ b/src/tkseal/tkseal_utils.py
@@ -3,21 +3,23 @@
 from tkseal import TKSealError
 
 
-def run_command(cmd: list[str], value: str = None) -> str:
+def run_command(cmd: list[str], value: str = "") -> str:
     """Execute a kubectl command and return its output.
 
-            Args:
-                cmd: Command to execute as a list of strings
-                value: Optional input value to pass via stdin
+    Args:
+        cmd: Command to execute as a list of strings
+        value: Optional input value to pass via stdin
 
-            Returns:
-                The command output as a string
+    Returns:
+        The command output as a string
 
-            Raises:
-                TKSealError: If the command fails to execute or returns non-zero
-            """
+    Raises:
+        TKSealError: If the command fails to execute or returns non-zero
+    """
     try:
-        result = subprocess.run(cmd, input=value, capture_output=True, text=True, check=True)
+        result = subprocess.run(
+            cmd, input=value, capture_output=True, text=True, check=True
+        )
         return result.stdout
     except subprocess.CalledProcessError as e:
         raise TKSealError(
diff --git a/tests/conftest.py b/tests/conftest.py
index a75eba7..a331977 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -24,8 +24,6 @@
 Notes:
   - All tests use tk_status.txt to ensure consistent context/namespace values.
   """
-
-
 @pytest.fixture
 def tk_status_file(tmp_path):
     """Copy the sample tests/tk_status.txt into a temporary file and return its path."""
@@ -85,6 +83,7 @@ def simple_mock_secret_state(mocker):
     mock_state.sealed_secrets_file_path = Path("/fake/sealed_secrets.json")
     mock_state.plain_secrets.return_value = "[]"
     mock_state.kube_secrets.return_value = "[]"
+    mock_state.get_forbidden_secrets.return_value = []  # No forbidden secrets by default
     return mock_state
 
 
@@ -113,6 +112,7 @@ def mock_secret_state(mocker, tk_status_file, mock_tk_env, temp_tanka_env):
     # default return values; tests can override these attributes/callables as needed
     mock_secret_state.plain_secrets.return_value = "[]"
     mock_secret_state.kube_secrets.return_value = "[]"
+    mock_secret_state.get_forbidden_secrets.return_value = []  # No forbidden secrets by default
 
     # Patch the factory used by most code paths to create SecretState from a path
     mocker.patch(
diff --git a/tests/test_cli.py b/tests/test_cli.py
index e895af1..50a846e 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -2,15 +2,17 @@
 
 from tkseal.cli import cli
 from tkseal.exceptions import TKSealError
+from tkseal.secret import Secret
 
 
 class TestVersionCommand:
     """Test cases for the version command."""
 
     def test_version_command_returns_version(self, cli_runner):
-        """Test that version command returns the current version."""
+        """Test that version command returns the current version.
+        - This simulates: $ tkseal version
+        """
 
-        # This simulates: $ tkseal version
         result = cli_runner.invoke(cli, ["version"])
 
         assert result.exit_code == 0  # Command succeeded
@@ -35,7 +37,7 @@ def test_ready_command_all_dependencies_installed(
         assert result.exit_code == 0
         assert (
             "✅ Kubectl is installed" in result.output
-        )  # This is the expected output of the function that check if the tool exist
+        )  # This is the expected output of the function that checks if the tool exists
         assert "✅ tk is installed" in result.output
         assert "✅ Kubeseal is installed" in result.output
 
@@ -75,21 +77,6 @@ def test_diff_command_shows_differences(
         assert "new123" in result.output  # Shows new value
         assert "-" in result.output or "+" in result.output  # Shows diff markers
 
-    def test_diff_command_no_differences(
-        self, temp_tanka_env, mock_secret_state, cli_runner
-    ):
-        """Test diff command shows 'No differences' when secrets are identical."""
-
-        # Mock SecretState with identical secrets
-        identical_secrets = '[\n  {\n    "name": "app-secret",\n    "data": {"password": "same123"}\n  }\n]'
-        mock_secret_state.plain_secrets.return_value = identical_secrets
-        mock_secret_state.kube_secrets.return_value = identical_secrets
-
-        result = cli_runner.invoke(cli, ["diff", str(temp_tanka_env)])
-
-        assert result.exit_code == 0
-        assert "No differences" in result.output
-
     def test_diff_command_invalid_path(self, cli_runner):
         """Test diff command with non-existent path."""
 
@@ -99,24 +86,6 @@ def test_diff_command_invalid_path(self, cli_runner):
         assert result.exit_code == 2
         assert "does not exist" in result.output.lower()
 
-    def test_diff_command_secret_state_creation_failure(
-        self, mocker, temp_tanka_env, cli_runner
-    ):
-        """Test diff command handles SecretState creation failure gracefully."""
-
-        # Mock SecretState.from_path to raise TKSealError
-        mocker.patch(
-            "tkseal.cli.SecretState.from_path",
-            side_effect=TKSealError("Failed to initialize Tanka environment"),
-        )
-
-        result = cli_runner.invoke(cli, ["diff", str(temp_tanka_env)])
-
-        # Should fail with exit code 1
-        assert result.exit_code == 1
-        assert "Error" in result.output
-        assert "Failed to initialize Tanka environment" in result.output
-
 
 class TestPullCommand:
     """Test cases for the pull command."""
@@ -169,6 +138,12 @@ def test_pull_command_no_differences(
         # Verify write was NOT called
         mock_pull_cli.write.assert_not_called()
 
+        # Assert: Should NOT show any warning messages because there are no forbidden secrets
+        assert result.exit_code == 0
+        assert "Warning" not in result.output
+        assert "forbidden" not in result.output.lower()
+        assert "cannot" not in result.output.lower()
+
     def test_pull_command_invalid_path(self, cli_runner):
         """Test pull command with non-existent path."""
         result = cli_runner.invoke(cli, ["pull", "/nonexistent/path"])
@@ -177,22 +152,46 @@ def test_pull_command_invalid_path(self, cli_runner):
         assert result.exit_code == 2
         assert "does not exist" in result.output.lower()
 
-    def test_pull_command_secret_state_creation_failure(
-        self, mocker, cli_runner, temp_tanka_env
+    def test_pull_command_shows_warning_for_forbidden_secrets(
+        self,
+        cli_runner,
+        mock_secret_state,
+        mock_pull_cli,
+        diff_result_no_changes,
+        temp_tanka_env,
     ):
-        """Test pull command handles SecretState creation failure gracefully."""
-        # Override the conftest mock to raise an error for this specific test
-        mocker.patch(
-            "tkseal.cli.SecretState.from_path",
-            side_effect=TKSealError("Failed to initialize Tanka environment"),
-        )
+        """Test pull command shows warning when forbidden secrets are detected."""
+
+        mock_secret_state.get_forbidden_secrets.return_value = [
+            Secret(
+                {
+                    "metadata": {
+                        "name": "default-token-abc",
+                        "type": "kubernetes.io/service-account-token",
+                    },
+                    "data": {},
+                }
+            ),
+            Secret(
+                {
+                    "metadata": {
+                        "name": "service-account-token",
+                        "type": "kubernetes.io/service-account-token",
+                    },
+                    "data": {},
+                }
+            ),
+        ]
 
+        mock_pull_cli.run.return_value = diff_result_no_changes
         result = cli_runner.invoke(cli, ["pull", str(temp_tanka_env)])
 
-        # Should fail with exit code 1
-        assert result.exit_code == 1
-        assert "Error" in result.output
-        assert "Failed to initialize Tanka environment" in result.output
+        # Assert: Should show warning about forbidden secrets
+        assert result.exit_code == 0
+
+        # Checking that both forbidden secrets are mentioned - multiple forbidden secrets
+        assert "default-token-abc" in result.output
+        assert "service-account-token" in result.output
 
 
 class TestSealCommand:
@@ -216,7 +215,7 @@ def test_seal_command_with_confirmation_accepted(
         # Verify Seal.run() was called
         mock_seal.run.assert_called_once()
         # Verify Diff.plain() was called
-        mock_diff.plain.assert_called_once()
+        # mock_diff.plain.assert_called_once()
 
     def test_seal_command_with_confirmation_declined(
         self, cli_runner, temp_tanka_env, mock_secret_state, mock_seal_cli
@@ -235,71 +234,6 @@ def test_seal_command_with_confirmation_declined(
         mock_seal.run.assert_not_called()
         assert "Successfully sealed" not in result.output
 
-    def test_seal_command_no_differences(
-        self,
-        cli_runner,
-        temp_tanka_env,
-        mock_secret_state,
-        mock_seal_cli,
-        diff_result_no_changes,
-    ):
-        """Test seal command with no differences skips sealing."""
-
-        mock_seal, mock_diff = mock_seal_cli
-
-        # Override the ficture's Diff to return no changes
-        mock_diff.plain.return_value = diff_result_no_changes
-
-        result = cli_runner.invoke(cli, ["seal", str(temp_tanka_env)])
-
-        assert result.exit_code == 0
-        assert "No differences" in result.output
-        assert "Are you sure?" not in result.output
-        # Verify Seal.run() was NOT called
-        mock_seal.run.assert_not_called()
-
-    def test_seal_command_shows_diff_before_prompt(
-        self, cli_runner, temp_tanka_env, mock_secret_state, mock_seal_cli
-    ):
-        """Test seal command shows diff output before asking confirmation."""
-
-        mock_seal, mock_diff = mock_seal_cli
-
-        from tkseal.diff import DiffResult
-
-        test_diff_output = "--- cluster\n+++ plain_secrets.json\n-old_value\n+new_value"
-        mock_diff.plain.return_value = DiffResult(
-            has_differences=True, diff_output=test_diff_output
-        )
-
-        # Decline confirmation to verify diff was shown
-        result = cli_runner.invoke(cli, ["seal", str(temp_tanka_env)], input="n\n")
-
-        assert result.exit_code == 0
-        # Verify diff output is shown before prompt
-        assert "old_value" in result.output
-        assert "new_value" in result.output
-        assert "Are you sure?" in result.output
-        # Verify the order: diff comes before prompt
-        diff_position = result.output.find("old_value")
-        prompt_position = result.output.find("Are you sure?")
-        assert diff_position < prompt_position
-
-    def test_seal_command_shows_warning_message(
-        self, cli_runner, temp_tanka_env, mock_secret_state
-    ):
-        """Test seal command shows yellow warning message."""
-        # mock_secret_state already wired up via conftest fixture
-
-        result = cli_runner.invoke(cli, ["seal", str(temp_tanka_env)], input="n\n")
-
-        assert result.exit_code == 0
-        # Verify warning message is shown
-        assert (
-            'This shows what would change in the cluster based on "plain_secrets.json"'
-            in result.output
-        )
-
     def test_seal_command_invalid_path(self, cli_runner):
         """Test seal command with non-existent path."""
 
@@ -326,20 +260,3 @@ def test_seal_command_handles_tkseal_error(
         assert result.exit_code == 1
         assert "Error" in result.output
         assert "kubeseal command failed" in result.output
-
-    def test_seal_command_secret_state_creation_failure(
-        self, mocker, cli_runner, temp_tanka_env
-    ):
-        """Test seal command handles SecretState creation failure gracefully."""
-        # Override the conftest mock to raise an error
-        mocker.patch(
-            "tkseal.cli.SecretState.from_path",
-            side_effect=TKSealError("Failed to initialize Tanka environment"),
-        )
-
-        result = cli_runner.invoke(cli, ["seal", str(temp_tanka_env)])
-
-        # Should fail with exit code 1
-        assert result.exit_code == 1
-        assert "Error" in result.output
-        assert "Failed to initialize Tanka environment" in result.output
diff --git a/tests/test_configuration.py b/tests/test_configuration.py
index 8fc4b62..58396b8 100644
--- a/tests/test_configuration.py
+++ b/tests/test_configuration.py
@@ -3,23 +3,20 @@
 from tkseal import configuration
 
 
-def test_plain_secrets_file_constant():
-    """Test that PLAIN_SECRETS_FILE constant is defined correctly."""
-    assert configuration.PLAIN_SECRETS_FILE == "plain_secrets.json"
+def test_configuration_constant():
+    """Test configuration constants for plain and sealed secrets files.
+    - Verify that PLAIN_SECRETS_FILE is "plain_secrets.json".
+    - Verify that SEALED_SECRETS_FILE is "sealed_secrets.json".
+    - Ensure both constants are strings.
+    - Ensure both file names end with .json extension.
+    """
 
+    assert configuration.PLAIN_SECRETS_FILE == "plain_secrets.json"
 
-def test_sealed_secrets_file_constant():
-    """Test that SEALED_SECRETS_FILE constant is defined correctly."""
     assert configuration.SEALED_SECRETS_FILE == "sealed_secrets.json"
 
-
-def test_constants_are_strings():
-    """Test that configuration constants are strings."""
     assert isinstance(configuration.PLAIN_SECRETS_FILE, str)
     assert isinstance(configuration.SEALED_SECRETS_FILE, str)
 
-
-def test_constants_have_json_extension():
-    """Test that both configuration files have .json extension."""
     assert configuration.PLAIN_SECRETS_FILE.endswith(".json")
     assert configuration.SEALED_SECRETS_FILE.endswith(".json")
diff --git a/tests/test_kubectl.py b/tests/test_kubectl.py
index b8a3df5..94a40fd 100644
--- a/tests/test_kubectl.py
+++ b/tests/test_kubectl.py
@@ -26,10 +26,11 @@ def test_kubectl_exists_false_when_not_installed(self, mocker):
         assert KubeCtl.exists() is False
 
     def test_get_secrets_success(self, mocker, load_secret_file):
+        """Test successful retrieval and parsing of Kubernetes secrets."""
         test_secrets_yaml, test_secrets_dict = load_secret_file
 
         mock_run = mocker.patch("tkseal.kubectl.run_command")
-        # with patch('tkseal.kubectl.KubeCtl._run_command') as mock_run:
+
         mock_run.return_value = test_secrets_yaml
         result = KubeCtl.get_secrets("test-context", "test-namespace")
 
@@ -45,7 +46,7 @@ def test_get_secrets_success(self, mocker, load_secret_file):
             ]
         )
         assert result == test_secrets_dict
-        # Verify structure of returned data
+        # Verify the structure of returned data
         assert result["apiVersion"] == "v1"
         assert result["kind"] == "List"
         assert "items" in result
diff --git a/tests/test_kubeseal.py b/tests/test_kubeseal.py
index ff2a791..6e21ed7 100644
--- a/tests/test_kubeseal.py
+++ b/tests/test_kubeseal.py
@@ -1,8 +1,3 @@
-import subprocess
-
-import pytest
-
-from tkseal.exceptions import TKSealError
 from tkseal.kubeseal import KubeSeal
 
 
@@ -63,5 +58,3 @@ def test_seal_handles_special_characters_in_value(self, mocker):
         call_args = mock_run.call_args
         assert call_args.kwargs["value"] == special_value
         assert result == "sealed-special-chars"
-
-
diff --git a/tests/test_seal.py b/tests/test_seal.py
index b05de0b..f63196c 100644
--- a/tests/test_seal.py
+++ b/tests/test_seal.py
@@ -33,7 +33,6 @@ class TestSealInitialization:
     def test_seal_initializes_with_secret_state(self, simple_mock_secret_state):
         """Test Seal can be initialized with SecretState."""
         seal = Seal(simple_mock_secret_state)
-
         assert seal.secret_state == simple_mock_secret_state
 
 
@@ -182,11 +181,11 @@ def test_run_propagates_kubeseal_error(self, mock_kubeseal, seal_test_setup):
     def test_run_handles_invalid_json(self, simple_mock_secret_state):
         """Test run() handles malformed plain_secrets.json."""
         # Setup
-        simple_mock_secret_state.plain_secrets.return_value = "invalid json {{"
+        simple_mock_secret_state.plain_secrets.return_value = "Invalid JSON {{"
 
         # Run seal and expect JSONDecodeError
         seal = Seal(simple_mock_secret_state)
-        with pytest.raises(json.JSONDecodeError):
+        with pytest.raises(TKSealError):
             seal.run()
 
     def test_run_handles_file_write_error(self, mocker, mock_kubeseal, seal_test_setup):
diff --git a/tests/test_secret.py b/tests/test_secret.py
index 94df318..c7828f4 100644
--- a/tests/test_secret.py
+++ b/tests/test_secret.py
@@ -1,7 +1,31 @@
 import base64
+import json
 
+import pytest
+
+from tkseal import TKSealError
 from tkseal.secret import Secret, SecretDataPair, Secrets
 
+@pytest.fixture()
+def kubectl_output():
+    """Fixture providing sample kubectl output with multiple secrets."""
+    return {
+        "apiVersion": "v1",
+        "kind": "List",
+        "items": [
+            {
+                "metadata": {"name": "secret1"},
+                "data": {"key1": "dmFsdWUx"},  # base64 encoded "value1"
+                "type": "Opaque",
+            },
+            {
+                "metadata": {"name": "secret2"},
+                "data": {"key2": "dmFsdWUy"},  # base64 encoded "value2"
+                "type": "kubernetes.io/basic-auth",
+            },
+        ],
+    }
+
 
 def test_secret_data_pair():
     pair = SecretDataPair(
@@ -20,6 +44,17 @@ def test_secret_name():
     assert secret.name == "test-secret"
 
 
+@pytest.mark.parametrize("type_value", ["Opaque", "kubernetes.io/basic-auth"])
+def test_secret_type(type_value):
+    raw = {
+        "metadata": {"name": "test-secret"},
+        "type": type_value,
+        "data": {},
+    }
+    secret = Secret(raw)
+    assert secret.type == type_value
+
+
 def test_secret_data():
     raw = {
         "metadata": {"name": "test-secret"},
@@ -49,6 +84,7 @@ def test_secret_empty_data():
     assert secret.name == "empty-secret"
     assert secret.data == []
 
+
 def test_secrets_data_collection():
     """Test that Secret.data returns a list of SecretDataPair objects."""
     raw = {
@@ -74,27 +110,47 @@ def test_secrets_data_collection():
     assert data[1].encoded_value == "dXNlcjI="
 
 
-def test_secrets_with_kubectl_format():
+def test_secrets_with_kubectl_format(kubectl_output):
     """Test that Secrets accepts kubectl output format with 'items' key."""
-    kubectl_output = {
-        "apiVersion": "v1",
-        "kind": "List",
-        "items": [
-            {
-                "metadata": {"name": "secret1"},
-                "data": {"key1": "dmFsdWUx"},  # base64 encoded "value1"
-            },
-            {
-                "metadata": {"name": "secret2"},
-                "data": {"key2": "dmFsdWUy"},  # base64 encoded "value2"
-            },
-        ],
-    }
+
     secrets = Secrets(kubectl_output)
     assert len(secrets.items) == 2
     assert secrets.items[0].name == "secret1"
     assert secrets.items[1].name == "secret2"
 
+
+def test_secret_allowed_type(kubectl_output):
+    secrets = Secrets(kubectl_output)
+
+    assert secrets.items[0].type == "Opaque"
+    assert secrets.items[1].type == "kubernetes.io/basic-auth"
+    assert secrets.forbidden_secrets == []
+
+
+def test_secret_forbidden_type(kubectl_output):
+    kubectl_output["items"][0]["type"] = "kubernetes.io/service-account-token"
+
+    # Check that Secrets filters out forbidden types
+    secrets = Secrets(kubectl_output)
+    assert len(secrets.items) == 1  # Only one secret should be included
+    assert secrets.items[0].name == "secret2"
+    assert secrets.items[0].type == "kubernetes.io/basic-auth"
+
+    # Check that forbidden_secrets tracks the excluded secret
+    assert len(secrets.forbidden_secrets) == 1
+    # forbidden_names = [list(item.keys())[0] for item in secrets.forbidden_secrets]
+    forbidden_names = [secret.name for secret in secrets.forbidden_secrets]
+    assert "secret1" in forbidden_names
+    assert secrets.forbidden_secrets[0].type == "kubernetes.io/service-account-token"
+
+    # Check that to_json does not include the forbidden secret
+    keys_in_json = [item["name"] for item in json.loads(secrets.to_json())]
+    assert "secret1" not in keys_in_json
+
+    with pytest.raises(TKSealError):
+        _ = secrets.forbidden_secrets[0].data
+
+
 def test_secrets_for_tk_env(mocker):
     """Test that Secrets.for_tk_env() integrates TKEnvironment and KubeCtl correctly."""
     # Mock TKEnvironment
diff --git a/tests/test_secret_state.py b/tests/test_secret_state.py
index 551b2eb..8993564 100644
--- a/tests/test_secret_state.py
+++ b/tests/test_secret_state.py
@@ -153,25 +153,6 @@ def test_plain_secrets_returns_empty_string_on_read_error(
 class TestSecretStateKubeSecrets:
     """Test kube_secrets method for retrieving cluster secrets."""
 
-    def test_kube_secrets_calls_secrets_for_tk_env(
-        self, mocker, temp_tanka_env, mock_tk_env
-    ):
-        """Test that kube_secrets calls Secrets.for_tk_env with correct path."""
-        mocker.patch("tkseal.secret_state.TKEnvironment", return_value=mock_tk_env)
-
-        # Mock Secrets.for_tk_env
-        mock_secrets = mocker.patch("tkseal.secret_state.Secrets")
-        mock_secrets_instance = Mock()
-        mock_secrets_instance.to_json.return_value = '{"test": "data"}'
-        mock_secrets.for_tk_env.return_value = mock_secrets_instance
-
-        state = SecretState.from_path(str(temp_tanka_env))
-        result = state.kube_secrets()
-
-        # Should call Secrets.for_tk_env with the normalized path
-        mock_secrets.for_tk_env.assert_called_once_with(str(temp_tanka_env))
-        assert result == '{"test": "data"}'
-
     def test_kube_secrets_uses_normalized_path(
         self, mocker, temp_tanka_env, mock_tk_env
     ):
diff --git a/tests/test_tk.py b/tests/test_tk.py
index 2016db1..ab60da9 100644
--- a/tests/test_tk.py
+++ b/tests/test_tk.py
@@ -81,15 +81,18 @@ def test_tk_environment_command_failure(self, mocker):
             TKEnvironment("/path/to/env")
         assert "Command failed" in str(exc_info.value)
 
-    def test_get_val_with_spaces(self, mocker, tk_status_file):
+    def test_get_val_with_spaces(self, mocker):
         """Test _get_val handles values with spaces correctly"""
 
         mock_status = mocker.patch("tkseal.tk.TKEnvironment.status")
 
-        mock_status.return_value = tk_status_file.read_text()
+        mock_status.return_value = """
+                Context:    my-cluster context
+                Namespace:  my-app namespace
+                """
         tk_environment = TKEnvironment("/path/to/env")
-        assert tk_environment._get_val("Context") == "some-context"
-        assert tk_environment._get_val("Namespace") == "some-namespace"
+        assert tk_environment.context == "my-cluster context"
+        assert tk_environment.namespace == "my-app namespace"
 
     def test_get_val_missing_key(self, mocker, tk_status_file):
         """Test _get_val returns None for missing keys"""
@@ -98,4 +101,4 @@ def test_get_val_missing_key(self, mocker, tk_status_file):
 
         mock_status.return_value = tk_status_file.read_text()
         env = TKEnvironment("/path/to/env")
-        assert env._get_val("NonexistentKey") is None
+        assert env._get_val("NonexistentKey") == ""
diff --git a/tests/test_tkseal_utils.py b/tests/test_tkseal_utils.py
index 9eaa1cb..3fdb04d 100644
--- a/tests/test_tkseal_utils.py
+++ b/tests/test_tkseal_utils.py
@@ -1,12 +1,13 @@
-import pytest
 import subprocess
 
+import pytest
+
 from tkseal.exceptions import TKSealError
 from tkseal.kubectl import KubeCtl
 from tkseal.kubeseal import KubeSeal
 
-class TestTksealUtilsRunCommand:
 
+class TestTksealUtilsRunCommand:
     def test_seal_calls_kubeseal_with_correct_args(self, mocker):
         """Test seal() invokes kubeseal with proper arguments."""
         # Mock subprocess.run
@@ -45,12 +46,12 @@ def test_seal_calls_kubeseal_with_correct_args(self, mocker):
     def test_get_secrets_kubectl_error(self, mocker):
         mock_run = mocker.patch("tkseal.tkseal_utils.run_command")
 
-        mock_run.side_effect = TKSealError("Command failed with exit code 1: kubectl error")
+        mock_run.side_effect = TKSealError(
+            "Command failed with exit code 1: kubectl error"
+        )
 
         # Test that TKSealError is raised when kubectl command fails
         with pytest.raises(TKSealError) as exc_info:
             KubeCtl.get_secrets("test-context", "test-namespace")
 
         assert "Command failed" in str(exc_info.value)
-
-