diff --git a/aws/aws_ecs_service_blue_green/.stackgen/stackgen.yaml b/aws/aws_ecs_service_blue_green/.stackgen/stackgen.yaml
new file mode 100644
index 0000000..b1160b7
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/.stackgen/stackgen.yaml
@@ -0,0 +1,22 @@
+version: 1.0
+
+representation:
+  side_panel:
+    label: AWS ECS Service
+  node:
+    label:
+      static: AWS ECS Service
+      template: ${name}
+    display_type: default
+
+discovery:
+  type: aws_ecs_service_blue_green
+  dnd_supported: false
+  data_source: data_aws_ecs_service_blue_green
+  references:
+    cluster:
+      from: aws_ecs_cluster
+      output: arn
+    task_definition:
+      from: aws_ecs_task_definition
+      output: arn
diff --git a/aws/aws_ecs_service_blue_green/README.md b/aws/aws_ecs_service_blue_green/README.md
new file mode 100644
index 0000000..d7ba5e9
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/README.md
@@ -0,0 +1,5 @@
+# aws_ecs_service_blue_green
+
+Discovery module scaffold for issue #55.
+
+Copied from sibling aws_ecs_service and adapted for workflow validation.
diff --git a/aws/aws_ecs_service_blue_green/aws_ecs_service_blue_green.tf b/aws/aws_ecs_service_blue_green/aws_ecs_service_blue_green.tf
new file mode 100644
index 0000000..2cb00ff
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/aws_ecs_service_blue_green.tf
@@ -0,0 +1,101 @@
+resource "aws_ecs_service" "this" {
+  name                               = var.name
+  cluster                            = var.cluster
+  availability_zone_rebalancing      = var.availability_zone_rebalancing
+  task_definition                    = var.task_definition
+  launch_type                        = var.launch_type
+  force_delete                       = var.force_delete
+  desired_count                      = var.desired_count
+  platform_version                   = var.platform_version
+  propagate_tags                     = var.propagate_tags
+  scheduling_strategy                = var.scheduling_strategy
+  deployment_maximum_percent         = var.deployment_maximum_percent
+  deployment_minimum_healthy_percent = var.deployment_minimum_healthy_percent
+  enable_ecs_managed_tags            = var.enable_ecs_managed_tags
+  enable_execute_command             = var.enable_execute_command
+  force_new_deployment               = var.force_new_deployment
+  health_check_grace_period_seconds  = var.health_check_grace_period_seconds
+  iam_role                           = var.iam_role
+  wait_for_steady_state              = var.wait_for_steady_state
+  tags                               = var.tags
+
+  dynamic "capacity_provider_strategy" {
+    for_each = var.capacity_provider_strategy
+    content {
+      base              = capacity_provider_strategy.value.base
+      capacity_provider = capacity_provider_strategy.value.capacity_provider
+      weight            = capacity_provider_strategy.value.weight
+    }
+  }
+
+  dynamic "deployment_controller" {
+    for_each = var.deployment_controller
+    content {
+      type = deployment_controller.value.type
+    }
+  }
+
+  dynamic "deployment_circuit_breaker" {
+    for_each = var.deployment_circuit_breaker
+    content {
+      enable   = deployment_circuit_breaker.value.enable
+      rollback = deployment_circuit_breaker.value.rollback
+    }
+  }
+
+  dynamic "network_configuration" {
+    for_each = var.network_configuration
+    content {
+      assign_public_ip = network_configuration.value.assign_public_ip
+      subnets          = network_configuration.value.subnets
+      security_groups  = network_configuration.value.security_groups
+    }
+  }
+
+  dynamic "load_balancer" {
+    for_each = var.load_balancer
+    content {
+      elb_name         = load_balancer.value.elb_name
+      target_group_arn = load_balancer.value.target_group_arn
+      container_name   = load_balancer.value.container_name
+      container_port   = load_balancer.value.container_port
+    }
+  }
+
+  dynamic "ordered_placement_strategy" {
+    for_each = var.ordered_placement_strategy
+    content {
+      type  = ordered_placement_strategy.value.type
+      field = ordered_placement_strategy.value.field
+    }
+  }
+
+  dynamic "placement_constraints" {
+    for_each = var.placement_constraints
+    content {
+      type       = placement_constraints.value.type
+      expression = placement_constraints.value.expression
+    }
+  }
+
+  dynamic "service_registries" {
+    for_each = var.service_registries
+    content {
+      registry_arn   = service_registries.value.registry_arn
+      container_name = service_registries.value.container_name
+      container_port = service_registries.value.container_port
+      port           = service_registries.value.port
+    }
+  }
+
+  dynamic "timeouts" {
+    for_each = var.timeouts != null ? [var.timeouts] : []
+    content {
+      create = lookup(timeouts.value, "create", null)
+      delete = lookup(timeouts.value, "delete", null)
+      update = lookup(timeouts.value, "update", null)
+    }
+  }
+}
+
+
diff --git a/aws/aws_ecs_service_blue_green/basic.tftest.hcl b/aws/aws_ecs_service_blue_green/basic.tftest.hcl
new file mode 100644
index 0000000..a02adfd
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/basic.tftest.hcl
@@ -0,0 +1,6 @@
+mock_provider "aws" {}
+
+# Plan-only smoke test; no assert with literal true (OpenTofu rejects non-referential conditions).
+run "basic_plan" {
+  command = plan
+}
diff --git a/aws/aws_ecs_service_blue_green/outputs.tf.json b/aws/aws_ecs_service_blue_green/outputs.tf.json
new file mode 100644
index 0000000..17597dc
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/outputs.tf.json
@@ -0,0 +1,8 @@
+{
+  "output": {
+    "arn": {
+      "description": "The value of the arn output",
+      "value": "${aws_ecs_service.this.id}"
+    }
+  }
+}
diff --git a/aws/aws_ecs_service_blue_green/policy.json b/aws/aws_ecs_service_blue_green/policy.json
new file mode 100644
index 0000000..fc948ec
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/policy.json
@@ -0,0 +1,27 @@
+{
+  "name": "aws_ecs_service",
+  "policy": {
+    "Version": "2012-10-17",
+    "Statement": [
+      {
+        "Sid": "Default",
+        "Effect": "Allow",
+        "Action": [
+          "ecs:Describe*",
+          "ecs:List*",
+          "ecs:DiscoverPollEndpoint",
+          "ecr:GetAuthorizationToken",
+          "ecr:BatchCheckLayerAvailability",
+          "ecr:GetDownloadUrlForLayer",
+          "ecr:BatchGetImage",
+          "logs:CreateLogGroup",
+          "logs:CreateLogStream",
+          "logs:PutLogEvents"
+        ],
+        "Resource": [
+          "${module.module_name.arn}"
+        ]
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/aws/aws_ecs_service_blue_green/variables.tf.json b/aws/aws_ecs_service_blue_green/variables.tf.json
new file mode 100644
index 0000000..c689171
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/variables.tf.json
@@ -0,0 +1,208 @@
+{
+  "variable": {
+    "name": [
+      {
+        "description": "The name of the ECS service",
+        "type": "string",
+        "nullable": false
+      }
+    ],
+    "cluster": [
+      {
+        "description": "The ARN of the ECS cluster to run the service on",
+        "type": "string",
+        "nullable": true
+      }
+    ],
+    "availability_zone_rebalancing": [
+      {
+        "description": "The availability zone rebalancing strategy to use",
+        "type": "string",
+        "nullable": true,
+        "default": "DISABLED"
+      }
+    ],
+    "task_definition": [
+      {
+        "description": "The ARN of the task definition to run on the service",
+        "type": "string",
+        "nullable": true
+      }
+    ],
+    "launch_type": [
+      {
+        "description": "The launch type on which to run your service",
+        "type": "string",
+        "nullable": true,
+        "default": "EC2"
+      }
+    ],
+    "force_delete": [
+      {
+        "description": "Whether to force a new deployment of the service",
+        "type": "bool",
+        "nullable": true
+      }
+    ],
+    "desired_count": [
+      {
+        "description": "The number of instances of the task to run on the service",
+        "type": "number",
+        "nullable": true
+      }
+    ],
+    "platform_version": [
+      {
+        "description": "The platform version on which to run your service",
+        "type": "string",
+        "nullable": true,
+        "default": "LATEST"
+      }
+    ],
+    "propagate_tags": [
+      {
+        "description": "Specifies whether to propagate the tags to the tasks",
+        "type": "string",
+        "nullable": true
+      }
+    ],
+    "scheduling_strategy": [
+      {
+        "description": "The scheduling strategy to use for the service",
+        "type": "string",
+        "nullable": true,
+        "default": "REPLICA"
+      }
+    ],
+    "deployment_maximum_percent": [
+      {
+        "description": "The upper limit of the number of tasks in a service",
+        "type": "number",
+        "nullable": true
+      }
+    ],
+    "deployment_minimum_healthy_percent": [
+      {
+        "description": "The lower limit of the number of tasks in a service",
+        "type": "number",
+        "nullable": true
+      }
+    ],
+    "enable_ecs_managed_tags": [
+      {
+        "description": "Whether to enable Amazon ECS managed tags for the service",
+        "type": "bool",
+        "nullable": true
+      }
+    ],
+    "enable_execute_command": [
+      {
+        "description": "Whether to enable execute command for the service",
+        "type": "bool",
+        "nullable": true
+      }
+    ],
+    "force_new_deployment": [
+      {
+        "description": "Whether to force a new deployment of the service",
+        "type": "bool",
+        "nullable": true
+      }
+    ],
+    "health_check_grace_period_seconds": [
+      {
+        "description": "The period of time, in seconds, that the Amazon ECS service scheduler ignores unhealthy Elastic Load Balancing target health checks after a task has started",
+        "type": "number",
+        "nullable": true
+      }
+    ],
+    "iam_role": [
+      {
+        "description": "The IAM role to use for the service",
+        "type": "string",
+        "nullable": true
+      }
+    ],
+    "wait_for_steady_state": [
+      {
+        "description": "Whether to wait for the service to reach a steady state before proceeding",
+        "type": "bool",
+        "nullable": true
+      }
+    ],
+    "tags": [
+      {
+        "description": "A map of tags to add to all resources",
+        "type": "map(string)",
+        "nullable": true
+      }
+    ],
+    "load_balancer": [
+      {
+        "description": "A list of load balancer configuration blocks",
+        "type": "list(object({ target_group_arn: string, container_name: string, container_port: number, elb_name: string }))",
+        "nullable": true
+      }
+    ],
+    "capacity_provider_strategy": [
+      {
+        "description": "A list of capacity provider strategy blocks",
+        "type": "list(object({ capacity_provider: string, base: number, weight: number }))",
+        "nullable": true
+      }
+    ],
+    "deployment_circuit_breaker": [
+      {
+        "description": "A list of deployment circuit breaker blocks",
+        "type": "list(object({ enable: bool, rollback: bool }))",
+        "nullable": true
+      }
+    ],
+    "network_configuration": [
+      {
+        "description": "A list of network configuration blocks",
+        "type": "list(object({ subnets: list(string), security_groups: list(string), assign_public_ip: bool }))",
+        "nullable": true
+      }
+    ],
+    "deployment_controller": [
+      {
+        "description": "A list of deployment controller blocks",
+        "type": "list(object({ type: string }))",
+        "nullable": true
+      }
+    ],
+    "ordered_placement_strategy": [
+      {
+        "description": "A list of ordered placement strategy blocks",
+        "type": "list(object({ type: string, field: string }))",
+        "nullable": true,
+        "default": []
+      }
+    ],
+    "placement_constraints": [
+      {
+        "description": "A list of placement constraints",
+        "type": "list(object({ type: string, expression: string }))",
+        "nullable": true,
+        "default": []
+      }
+    ],
+    "service_registries": [
+      {
+        "description": "A list of service registry blocks",
+        "type": "list(object({ registry_arn: string, container_name: string, container_port: number, port: number }))",
+        "nullable": true,
+        "default": []
+      }
+    ],
+    "timeouts": [
+      {
+        "description": "A map of timeouts",
+        "type": "object({ create: optional(string), delete: optional(string), update: optional(string) })",
+        "nullable": true,
+        "default": {}
+      }
+    ]
+  }
+}
diff --git a/aws/aws_ecs_service_blue_green/versions.tf b/aws/aws_ecs_service_blue_green/versions.tf
new file mode 100644
index 0000000..f38a81c
--- /dev/null
+++ b/aws/aws_ecs_service_blue_green/versions.tf
@@ -0,0 +1,9 @@
+terraform {
+  required_version = ">= 1.0.0, < 2.0.0"
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 5.0"
+    }
+  }
+}
\ No newline at end of file