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+
+<b>Pattern 1: Always initialize Gomega within each t.Run subtest to ensure failures are scoped to the subtest and do not terminate sibling tests.</b>
+
+Example code before:
+```
+func TestFoo(t *testing.T) {
+  g := NewWithT(t)
+  for _, tc := range cases {
+    t.Run(tc.name, func(t *testing.T) {
+      g.Expect(Compute(tc.in)).To(Equal(tc.want)) // shares parent g; failNow aborts siblings
+    })
+  }
+}
+```
+
+Example code after:
+```
+func TestFoo(t *testing.T) {
+  for _, tc := range cases {
+    t.Run(tc.name, func(t *testing.T) {
+      g := NewWithT(t) // create per-subtest
+      g.Expect(Compute(tc.in)).To(Equal(tc.want))
+    })
+  }
+}
+```
+
+<details><summary>Examples for relevant past discussions:</summary>
+
+- https://github.com/securesign/secure-sign-operator/pull/1181#discussion_r2191839409
+</details>
+
+
+___
+
+<b>Pattern 2: Add and enforce default timeouts in Ginkgo/Gomega E2E tests by calling EnforceDefaultTimeoutsWhenUsingContexts and setting SetDefaultEventuallyTimeout to avoid hanging Eventually blocks.</b>
+
+Example code before:
+```
+func TestE2E(t *testing.T) {
+  RegisterFailHandler(Fail)
+  RunSpecs(t, "Suite")
+  // Eventually(...) without a default timeout may hang
+}
+```
+
+Example code after:
+```
+func TestE2E(t *testing.T) {
+  RegisterFailHandler(Fail)
+  SetDefaultEventuallyTimeout(3 * time.Minute)
+  EnforceDefaultTimeoutsWhenUsingContexts()
+  RunSpecs(t, "Suite")
+}
+```
+
+<details><summary>Examples for relevant past discussions:</summary>
+
+- https://github.com/securesign/secure-sign-operator/pull/1298#discussion_r2314147484
+</details>
+
+
+___
+
+<b>Pattern 3: Avoid unnecessary per-iteration allocations in loops by constructing shared slices or data structures once before the loop and reusing them inside.</b>
+
+Example code before:
+```
+func Apply(names ...string) {
+  for i, c := range pod.Spec.Containers {
+    sel := append(names[:0:0], names...) // or recomputing inside loop
+    if contains(sel, c.Name) { /* ... */ }
+  }
+}
+```
+
+Example code after:
+```
+func Apply(names ...string) {
+  sel := append([]string(nil), names...) // build once
+  for i, c := range pod.Spec.Containers {
+    if contains(sel, c.Name) { /* ... */ }
+  }
+}
+```
+
+<details><summary>Examples for relevant past discussions:</summary>
+
+- https://github.com/securesign/secure-sign-operator/pull/1200#discussion_r2212645370
+</details>
+
+
+___
+
+<b>Pattern 4: Provide unit tests for API validation rules and controller edge cases when introducing CEL validations or complex condition handling, covering all options and immutability constraints.</b>
+
+Example code before:
+```
+// Add CEL rule, but no tests
+// +kubebuilder:validation:XValidation:rule=(self || !oldSelf)
+Enabled bool `json:"enabled"`
+```
+
+Example code after:
+```
+func TestMonitoring_Immutability(t *testing.T) {
+  // create resource with Enabled=true
+  // attempt to update to false and assert IsInvalid error and message
+}
+func TestHandler_AllOptions(t *testing.T) {
+  // exercise nil/empty fields (e.g., optional Port), all branches and ensure consistent URLs/status
+}
+```
+
+<details><summary>Examples for relevant past discussions:</summary>
+
+- https://github.com/securesign/secure-sign-operator/pull/1143#discussion_r2142898824
+- https://github.com/securesign/secure-sign-operator/pull/1116#discussion_r2111714336
+- https://github.com/securesign/secure-sign-operator/pull/1200#discussion_r2212648574
+- https://github.com/securesign/secure-sign-operator/pull/1128#discussion_r2215880911
+</details>
+
+
+___