diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bc8a6fe
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+node_modules/
+dist/
+coverage/
+*.log
+.DS_Store
+.kiro/
+.vscode/
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..e224b7f
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,96 @@
+name: 'Amazon ECS "Deploy Express Service" Action for GitHub Actions'
+description: 'Creates or updates an Amazon ECS Express Mode service'
+branding:
+  icon: 'cloud'
+  color: 'orange'
+inputs:
+  # Required inputs
+  image:
+    description: 'The container image URI to deploy (e.g., 123456789012.dkr.ecr.us-east-1.amazonaws.com/my-app:latest)'
+    required: true
+  execution-role-arn:
+    description: 'The ARN of the task execution role that grants the ECS agent permission to pull container images and publish logs'
+    required: true
+  infrastructure-role-arn:
+    description: 'The ARN of the infrastructure role that grants ECS permission to create and manage AWS resources (ALB, target groups, etc.)'
+    required: true
+  
+  # Service identification
+  service-name:
+    description: 'The name of the ECS Express service (serviceName). If the service exists, it will be updated. If not, a new service will be created with this name. If not provided, AWS will generate a unique name for new services.'
+    required: false
+  cluster:
+    description: "The name of the ECS cluster. Will default to the 'default' cluster."
+    required: false
+    default: 'default'
+  
+  # Primary container configuration
+  container-port:
+    description: 'The port number on the container that receives traffic (containerPort in primaryContainer). If not specified, Express Mode will use port 80.'
+    required: false
+  environment-variables:
+    description: 'Environment variables to set in the container (environment in primaryContainer). Provide as JSON array: [{"name":"KEY","value":"VALUE"}]'
+    required: false
+  secrets:
+    description: 'Secrets to inject into the container (secrets in primaryContainer). Provide as JSON array: [{"name":"KEY","valueFrom":"arn:aws:secretsmanager:..."}]'
+    required: false
+  command:
+    description: 'Override the default container command (command in primaryContainer). Provide as JSON array: ["node","server.js"]'
+    required: false
+  log-group:
+    description: 'CloudWatch Logs log group name for container logs (logGroup in awsLogsConfiguration). If not specified, Express Mode creates a log group automatically.'
+    required: false
+  log-stream-prefix:
+    description: 'CloudWatch Logs stream prefix for container logs (logStreamPrefix in awsLogsConfiguration). If not specified, Express Mode uses a default prefix.'
+    required: false
+  repository-credentials:
+    description: 'ARN of the secret containing credentials for private container registry (credentialsParameter in repositoryCredentials). Required for private registries outside ECR.'
+    required: false
+  
+  # Resource configuration
+  cpu:
+    description: 'The number of CPU units to allocate (256, 512, 1024, 2048, 4096, 8192, 16384). If not specified, Express Mode defaults to 256 (.25 vCPU).'
+    required: false
+  memory:
+    description: 'The amount of memory in MiB to allocate (512, 1024, 2048, 4096, 8192, 16384, 30720, 61440, 122880). If not specified, Express Mode defaults to 512 MiB.'
+    required: false
+  task-role-arn:
+    description: 'The ARN of the IAM role that the container can assume to make AWS API calls (taskRoleArn)'
+    required: false
+  
+  # Network configuration
+  subnets:
+    description: 'Comma-separated list of subnet IDs for the service (subnets in networkConfiguration). If not specified, Express Mode uses the default VPC.'
+    required: false
+  security-groups:
+    description: 'Comma-separated list of security group IDs for the service (securityGroups in networkConfiguration).'
+    required: false
+  
+  # Health check configuration
+  health-check-path:
+    description: 'The path for ALB health checks (healthCheckPath). If not specified, Express Mode defaults to /ping.'
+    required: false
+  
+  # Auto-scaling configuration
+  min-task-count:
+    description: 'Minimum number of tasks for auto-scaling (minTaskCount in scalingTarget). Must be less than or equal to max-task-count.'
+    required: false
+  max-task-count:
+    description: 'Maximum number of tasks for auto-scaling (maxTaskCount in scalingTarget). Must be greater than or equal to min-task-count.'
+    required: false
+  auto-scaling-metric:
+    description: 'The metric to use for auto-scaling (autoScalingMetric in scalingTarget): AVERAGE_CPU, AVERAGE_MEMORY, or REQUEST_COUNT_PER_TARGET'
+    required: false
+  auto-scaling-target-value:
+    description: 'The target value for the auto-scaling metric (autoScalingTargetValue in scalingTarget). For example, 60 for 60% CPU utilization.'
+    required: false
+  
+outputs:
+  service-arn:
+    description: 'The ARN of the deployed Express service'
+  endpoint:
+    description: 'The endpoint URL of the service (from the Application Load Balancer)'
+
+runs:
+  using: 'node20'
+  main: 'dist/index.js'
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..6b5362e
--- /dev/null
+++ b/index.js
@@ -0,0 +1,45 @@
+const core = require('@actions/core');
+const { ECSClient } = require('@aws-sdk/client-ecs');
+
+/**
+ * Main entry point for the GitHub Action
+ * Creates or updates an Amazon ECS Express Mode service
+ */
+async function run() {
+  try {
+    core.info('Amazon ECS Deploy Express Service action started');
+    
+    // Read required inputs
+    const image = core.getInput('image', { required: false });
+    const executionRoleArn = core.getInput('execution-role-arn', { required: false });
+    const infrastructureRoleArn = core.getInput('infrastructure-role-arn', { required: false });
+    
+    // Validate required inputs are not empty
+    if (!image || image.trim() === '') {
+      throw new Error('Input required and not supplied: image');
+    }
+    
+    if (!executionRoleArn || executionRoleArn.trim() === '') {
+      throw new Error('Input required and not supplied: execution-role-arn');
+    }
+    
+    if (!infrastructureRoleArn || infrastructureRoleArn.trim() === '') {
+      throw new Error('Input required and not supplied: infrastructure-role-arn');
+    }
+    
+    core.info(`Container image: ${image}`);
+    core.debug(`Execution role ARN: ${executionRoleArn}`);
+    core.debug(`Infrastructure role ARN: ${infrastructureRoleArn}`);
+    
+  } catch (error) {
+    core.setFailed(error.message);
+    core.debug(error.stack);
+  }
+}
+
+module.exports = run;
+
+// Execute run() if this module is the entry point
+if (require.main === module) {
+  run();
+}
diff --git a/index.test.js b/index.test.js
new file mode 100644
index 0000000..1acba6f
--- /dev/null
+++ b/index.test.js
@@ -0,0 +1,91 @@
+const core = require('@actions/core');
+const { ECSClient } = require('@aws-sdk/client-ecs');
+const run = require('./index');
+
+// Mock the dependencies
+jest.mock('@actions/core');
+jest.mock('@aws-sdk/client-ecs');
+
+describe('Amazon ECS Deploy Express Service Action', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+    
+    // Setup default mock implementations
+    core.getInput = jest.fn();
+    core.setFailed = jest.fn();
+    core.setOutput = jest.fn();
+    core.info = jest.fn();
+    core.debug = jest.fn();
+  });
+
+  describe('Input Validation', () => {
+    test('should fail when image input is missing', async () => {
+      core.getInput.mockImplementation((name) => {
+        if (name === 'image') return '';
+        if (name === 'execution-role-arn') return 'arn:aws:iam::123456789012:role/execution';
+        if (name === 'infrastructure-role-arn') return 'arn:aws:iam::123456789012:role/infrastructure';
+        return '';
+      });
+
+      await run();
+
+      expect(core.setFailed).toHaveBeenCalledWith('Input required and not supplied: image');
+    });
+
+    test('should fail when execution-role-arn input is missing', async () => {
+      core.getInput.mockImplementation((name) => {
+        if (name === 'image') return 'nginx:latest';
+        if (name === 'execution-role-arn') return '';
+        if (name === 'infrastructure-role-arn') return 'arn:aws:iam::123456789012:role/infrastructure';
+        return '';
+      });
+
+      await run();
+
+      expect(core.setFailed).toHaveBeenCalledWith('Input required and not supplied: execution-role-arn');
+    });
+
+    test('should fail when infrastructure-role-arn input is missing', async () => {
+      core.getInput.mockImplementation((name) => {
+        if (name === 'image') return 'nginx:latest';
+        if (name === 'execution-role-arn') return 'arn:aws:iam::123456789012:role/execution';
+        if (name === 'infrastructure-role-arn') return '';
+        return '';
+      });
+
+      await run();
+
+      expect(core.setFailed).toHaveBeenCalledWith('Input required and not supplied: infrastructure-role-arn');
+    });
+
+    test('should accept valid required inputs', async () => {
+      core.getInput.mockImplementation((name) => {
+        if (name === 'image') return 'nginx:latest';
+        if (name === 'execution-role-arn') return 'arn:aws:iam::123456789012:role/execution';
+        if (name === 'infrastructure-role-arn') return 'arn:aws:iam::123456789012:role/infrastructure';
+        if (name === 'cluster') return 'default';
+        return '';
+      });
+
+      await run();
+
+      expect(core.info).toHaveBeenCalledWith('Amazon ECS Deploy Express Service action started');
+      expect(core.info).toHaveBeenCalledWith('Container image: nginx:latest');
+    });
+  });
+
+  describe('Input Trimming', () => {
+    test('should fail when image input is only whitespace', async () => {
+      core.getInput.mockImplementation((name) => {
+        if (name === 'image') return '   ';
+        if (name === 'execution-role-arn') return 'arn:aws:iam::123456789012:role/execution';
+        if (name === 'infrastructure-role-arn') return 'arn:aws:iam::123456789012:role/infrastructure';
+        return '';
+      });
+
+      await run();
+
+      expect(core.setFailed).toHaveBeenCalledWith('Input required and not supplied: image');
+    });
+  });
+});
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..6b93085
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "amazon-ecs-deploy-express-service",
+  "version": "1.0.0",
+  "description": "GitHub Action to deploy containerized applications to Amazon ECS Express Mode services",
+  "main": "index.js",
+  "scripts": {
+    "package": "ncc build index.js -o dist",
+    "lint": "eslint **.js",
+    "test": "eslint **.js && jest --coverage"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/aws-actions/amazon-ecs-deploy-express-service.git"
+  },
+  "keywords": [
+    "actions",
+    "aws",
+    "ecs",
+    "express",
+    "deploy"
+  ],
+  "author": "AWS",
+  "license": "MIT",
+  "dependencies": {
+    "@actions/core": "^1.10.1",
+    "@aws-sdk/client-ecs": "^3.939.0"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.38.0",
+    "@vercel/ncc": "^0.38.3",
+    "eslint": "^9.39.1",
+    "jest": "^29.7.0"
+  }
+}