diff --git a/internal/kubernetes/api/contract.go b/internal/kubernetes/api/contract.go
new file mode 100644
index 0000000..778f64e
--- /dev/null
+++ b/internal/kubernetes/api/contract.go
@@ -0,0 +1 @@
+package api
diff --git a/internal/kubernetes/api/provider.go b/internal/kubernetes/api/provider.go
new file mode 100644
index 0000000..5bf639c
--- /dev/null
+++ b/internal/kubernetes/api/provider.go
@@ -0,0 +1,20 @@
+package api
+
+import "github.com/kamilsk/forward/internal/kubernetes"
+
+// New returns new instance of Kubernetes provider above API.
+func New() *provider {
+	return &provider{}
+}
+
+type provider struct{}
+
+// Find tries to find pods suitable by the pattern.
+func (*provider) Find(string) []kubernetes.Pod {
+	panic("implement me")
+}
+
+// Forward initiates the port forwarding process.
+func (*provider) Forward(kubernetes.Pod, kubernetes.Mapping) {
+	panic("implement me")
+}
diff --git a/internal/kubernetes/cli/contract.go b/internal/kubernetes/cli/contract.go
new file mode 100644
index 0000000..7f1e458
--- /dev/null
+++ b/internal/kubernetes/cli/contract.go
@@ -0,0 +1 @@
+package cli
diff --git a/internal/kubernetes/cli/provider.go b/internal/kubernetes/cli/provider.go
new file mode 100644
index 0000000..6169a86
--- /dev/null
+++ b/internal/kubernetes/cli/provider.go
@@ -0,0 +1,20 @@
+package cli
+
+import "github.com/kamilsk/forward/internal/kubernetes"
+
+// New returns new instance of Kubernetes provider above CLI.
+func New() *provider {
+	return &provider{}
+}
+
+type provider struct{}
+
+// Find tries to find pods suitable by the pattern.
+func (*provider) Find(string) []kubernetes.Pod {
+	panic("implement me")
+}
+
+// Forward initiates the port forwarding process.
+func (*provider) Forward(kubernetes.Pod, kubernetes.Mapping) {
+	panic("implement me")
+}
diff --git a/internal/kubernetes/interface.go b/internal/kubernetes/interface.go
new file mode 100644
index 0000000..088f2f2
--- /dev/null
+++ b/internal/kubernetes/interface.go
@@ -0,0 +1,22 @@
+package kubernetes
+
+type (
+	// Port is a type for port number.
+	Port int16
+	// Local specifies local ports.
+	Local Port
+	// Remote specifies remote ports.
+	Remote Port
+	// Pod specifies a fully-qualified pod name.
+	Pod string
+	// Mapping specifies port forwarding rules.
+	Mapping map[Local]Remote
+)
+
+// Interface defines a top-level behavior of Kubernetes provider (API or CLI).
+type Interface interface {
+	// Find tries to find pods suitable by the pattern.
+	Find(string) []Pod
+	// Forward initiates the port forwarding process.
+	Forward(Pod, Mapping)
+}