diff --git a/oidc-deploy-roles.yaml b/oidc-deploy-roles.yaml
index 8d2146a..d1e8782 100644
--- a/oidc-deploy-roles.yaml
+++ b/oidc-deploy-roles.yaml
@@ -1162,6 +1162,46 @@ Resources:
   # Mgmt role github-meal-order-manager-weekly-menu deleted with this stack update.
 
 
+
+  # PLAT-234 principal only. The checks are seahaven-org-baseline pull request
+  # 160: .github/workflows/ci.yaml job iam-policy-check and
+  # scripts/check_iam_policies.py. That job assumes this role. It asserts
+  # StringEquals on the bootstrap trust templates, no lambda write on the
+  # plan template, then ValidatePolicy and CheckNoNewAccess when this role
+  # can be assumed.
+  SeahavenOrgBaselinePolicyCheckRole:
+    Type: AWS::IAM::Role
+    Properties:
+      RoleName: githubdeploy-seahaven-org-baseline-policy-check
+      Description: Access Analyzer policy checks for seahaven-org-baseline CI. No deploy permissions.
+      AssumeRolePolicyDocument:
+        Version: "2012-10-17"
+        Statement:
+          - Effect: Allow
+            Principal:
+              Federated: !Sub arn:aws:iam::${AWS::AccountId}:oidc-provider/token.actions.githubusercontent.com
+            Action: sts:AssumeRoleWithWebIdentity
+            Condition:
+              StringEquals:
+                token.actions.githubusercontent.com:aud: sts.amazonaws.com
+              StringLike:
+                token.actions.githubusercontent.com:sub:
+                  - !Sub repo:${GitHubOrg}/seahaven-org-baseline:ref:refs/heads/main
+                  # use_immutable_subject is false, so pull_request tokens use
+                  # repo:ORG/seahaven-org-baseline:ref:refs/pull/N/merge.
+                  - !Sub repo:${GitHubOrg}/seahaven-org-baseline:ref:refs/pull/*
+      Policies:
+        - PolicyName: access-analyzer-policy-check
+          PolicyDocument:
+            Version: "2012-10-17"
+            Statement:
+              - Sid: AccessAnalyzerPolicyCheck
+                Effect: Allow
+                Action:
+                  - access-analyzer:ValidatePolicy
+                  - access-analyzer:CheckNoNewAccess
+                Resource: "*"
+
 Outputs:
   LambdaExecutionBoundaryArn:
     Value: !Ref LambdaExecutionBoundary
@@ -1190,4 +1230,6 @@ Outputs:
   # deleted only when this stack is deployed. That deploy is not this change.
   SeahavenAccountBaselineDeployRoleArn:
     Value: !GetAtt SeahavenAccountBaselineDeployRole.Arn
+  SeahavenOrgBaselinePolicyCheckRoleArn:
+    Value: !GetAtt SeahavenOrgBaselinePolicyCheckRole.Arn
   # MealOrderManagerWeeklyMenuRoleArn removed 2026-08-20 (PLAT-70): role deleted with resource.