diff --git a/oidc-deploy-roles.yaml b/oidc-deploy-roles.yaml
index 94154d7..2d43de5 100644
--- a/oidc-deploy-roles.yaml
+++ b/oidc-deploy-roles.yaml
@@ -56,6 +56,7 @@ Resources:
   #     - DynamoDB CRUD (afterhours-shifts table)
   #     - secretsmanager:GetSecretValue (afterhours-shift-manager/*)
   #     - ses:SendEmail (SES identity)
+  #     - sqs:SendMessage (paychex-checkcomponents in seahaven-prod, WeeklyPost)
   #     - CloudWatch Logs (all functions)
   #
   #   payments-dashboard
@@ -209,6 +210,25 @@ Resources:
             Resource:
               - !Sub "arn:aws:sqs:us-east-1:${AWS::AccountId}:*"
 
+          # ── SQS cross-account send (afterhours WeeklyPost -> paychex) ─────
+          # afterhours-shift-manager WeeklyPostFunction enqueues the weekly
+          # after-hours pay payload onto paychex-integrations' checkcomponents
+          # queue in seahaven-prod (PLAT-135). Send only. This is a ceiling,
+          # not a grant: the function's inline policy already allows this ARN
+          # and the prod queue policy admits only WeeklyPostFunctionRole-*, so
+          # the boundary was the one missing piece. The PrincipalArn condition
+          # keeps the ceiling closed for every other role on this boundary even
+          # if the queue policy is later loosened.
+          - Sid: SQSPaychexCheckcomponentsSend
+            Effect: Allow
+            Action:
+              - sqs:SendMessage
+            Resource:
+              - arn:aws:sqs:us-east-1:011934824531:paychex-checkcomponents
+            Condition:
+              ArnLike:
+                aws:PrincipalArn: !Sub "arn:aws:iam::${AWS::AccountId}:role/afterhours-shift-manager-WeeklyPostFunctionRole-*"
+
           # ── Lambda invocation (payments, meal-order inter-function calls) ──
           - Sid: LambdaInvoke
             Effect: Allow