diff --git a/.agents/skills/module/SKILL.md b/.agents/skills/module/SKILL.md
index 6e377ace..9389c6a8 100644
--- a/.agents/skills/module/SKILL.md
+++ b/.agents/skills/module/SKILL.md
@@ -37,6 +37,7 @@ conventions, see the reference files in `.agents/references/`.
 5. **Write the BBD readme** → `.agents/references/bbd-readme.md`
 
 6. **Write `meshstack_integration.tf`** — follow AGENTS.md § `meshstack_integration.tf` Conventions
+   - Always add `lifecycle { ignore_changes = [ availability ] }` to every `meshstack_platform` resource (see AGENTS.md § `meshstack_platform` Lifecycle)
 
 7. **Validate**:
    ```sh
diff --git a/AGENTS.md b/AGENTS.md
index 7276e3a3..9fba8b9a 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -159,6 +159,22 @@ resource "meshstack_building_block_definition" "this" {
 }
 ```
 
+<!-- scorecard-checks: platform_lifecycle_ignore_availability -->
+### `meshstack_platform` Lifecycle
+
+Every `meshstack_platform` resource must include a `lifecycle` block that ignores changes to `availability`:
+
+```hcl
+resource "meshstack_platform" "this" {
+  # ...
+  lifecycle {
+    ignore_changes = [spec.availability]
+  }
+}
+```
+
+The `availability` field controls publication state and access restrictions. meshStack operators modify this after initial deployment (e.g. to publish a platform to users) — Terraform must not reset it on subsequent applies.
+
 ---
 
 <!-- scorecard-checks: provider_pinned -->
@@ -336,5 +352,6 @@ See [.agents/skills/write-e2e-test/SKILL.md](.agents/skills/write-e2e-test/SKILL
 - [ ] `meshstack` and `hub` variables are at the end of the variable section
 - [ ] `logo.png` included in `buildingblock/`
 - [ ] No `documentation_md` output in `backplane/` — use BBD `readme` field and `backplane/README.md` instead
+- [ ] `meshstack_platform` resources include `lifecycle { ignore_changes = [spec.availability] }`
 - [ ] No trailing whitespace
 - [ ] **Azure modules**: also follow the [Azure Backplane Checklist](.agents/skills/azure-backplane.md#checklist-for-azure-backplanes)
diff --git a/modules/aks/meshstack_integration.tf b/modules/aks/meshstack_integration.tf
index 4ae52af0..b7b5c40f 100644
--- a/modules/aks/meshstack_integration.tf
+++ b/modules/aks/meshstack_integration.tf
@@ -117,6 +117,10 @@ resource "meshstack_platform" "aks" {
       }
     }
   }
+
+  lifecycle {
+    ignore_changes = [spec.availability]
+  }
 }
 
 resource "meshstack_landingzone" "aks_default" {
diff --git a/modules/azure/meshstack_integration.tf b/modules/azure/meshstack_integration.tf
index 9beeba49..eb32cbc1 100644
--- a/modules/azure/meshstack_integration.tf
+++ b/modules/azure/meshstack_integration.tf
@@ -211,6 +211,10 @@ resource "meshstack_platform" "azure" {
       }
     }
   }
+
+  lifecycle {
+    ignore_changes = [spec.availability]
+  }
 }
 
 resource "meshstack_landingzone" "azure_default" {
diff --git a/modules/ske/ske-starterkit/e2e/meshstack_kubernetes_platform/main.tf b/modules/ske/ske-starterkit/e2e/meshstack_kubernetes_platform/main.tf
index c200079b..cdfa9018 100644
--- a/modules/ske/ske-starterkit/e2e/meshstack_kubernetes_platform/main.tf
+++ b/modules/ske/ske-starterkit/e2e/meshstack_kubernetes_platform/main.tf
@@ -146,6 +146,10 @@ resource "meshstack_platform" "this" {
 
     contributing_workspaces = []
   }
+
+  lifecycle {
+    ignore_changes = [spec.availability]
+  }
 }
 
 # dev meshLandingZone
diff --git a/modules/stackit/meshstack_integration.tf b/modules/stackit/meshstack_integration.tf
index 0eed9915..d089ed55 100644
--- a/modules/stackit/meshstack_integration.tf
+++ b/modules/stackit/meshstack_integration.tf
@@ -73,6 +73,10 @@ resource "meshstack_platform" "stackit" {
     owned_by_workspace = var.meshstack.owning_workspace_identifier
   }
 
+  lifecycle {
+    ignore_changes = [spec.availability]
+  }
+
   spec = {
     display_name = "STACKIT Project"
     description  = "Create a STACKIT project with role-based access control."
diff --git a/tools/scorecard/scorecard.mjs b/tools/scorecard/scorecard.mjs
index af219b74..72e05449 100755
--- a/tools/scorecard/scorecard.mjs
+++ b/tools/scorecard/scorecard.mjs
@@ -310,6 +310,22 @@ const detectors = [
       };
     },
   },
+  {
+    id: "platform_lifecycle_ignore_availability",
+    category: "integration",
+    name: "meshstack_platform has lifecycle ignore_changes = [availability]",
+    emoji: "🔄",
+    fn: (mod) => {
+      const content = readIntegrationTf(mod);
+      if (!content) return { pass: false, detail: "no integration file" };
+      const hasPlatformResource = /resource\s+"meshstack_platform"/.test(content);
+      if (!hasPlatformResource) return { pass: null, detail: "no meshstack_platform resource" };
+      return {
+        pass: /lifecycle\s*\{[\s\S]*?ignore_changes\s*=\s*\[[^\]]*spec\.availability[^\]]*\]/.test(content),
+        detail: "add lifecycle { ignore_changes = [spec.availability] } to meshstack_platform resource",
+      };
+    },
+  },
 
   // ─── Azure Backplane ────────────────────────────────────────────────────
   {