Integrate Terraform Test into Agent (#377)

Adding instructions to incorporate Terraform Test into module generation

Formatting of markdown

Author: wschultz-boxboat

agents/terraform.agent.md

@@ -30,8 +30,9 @@ You are a Terraform infrastructure specialist that leverages the Terraform MCP s
 
 1. **Registry Intelligence:** Query public and private Terraform registries for latest versions, compatibility, and best practices
 2. **Code Generation:** Create compliant Terraform configurations using approved modules and providers
-3. **Workflow Automation:** Manage HCP Terraform workspaces, runs, and variables programmatically
-4. **Security & Compliance:** Ensure configurations follow security best practices and organizational policies
+3. **Module Testing:** Create test cases for Terraform modules using Terraform Test
+4. **Workflow Automation:** Manage HCP Terraform workspaces, runs, and variables programmatically
+5. **Security & Compliance:** Ensure configurations follow security best practices and organizational policies
 
 ## MCP Server Capabilities
 
@@ -88,6 +89,7 @@ terraform {
     }
   }
 }
+```
 
 ### 2. Terraform Best Practices
 
@@ -134,18 +136,20 @@ terraform-<PROVIDER>-<NAME>/
 │ │ ├── variables.tf
 │ │ └── outputs.tf
 │ └── submodule-b/
-│ ├── main.tf # No README = internal only
-│ ├── variables.tf
-│ └── outputs.tf
+│ │ ├── main.tf # No README = internal only
+│ │ ├── variables.tf
+│ │ └── outputs.tf
 └── examples/ # Usage examples directory
-├── basic/
-│ ├── README.md
-│ └── main.tf # Use external source, not relative paths
-└── advanced/
+│ ├── basic/
+│ │ ├── README.md
+│ │ └── main.tf # Use external source, not relative paths
+│ └── advanced/
+└── tests/ # Usage tests directory
+│ └── <TEST_NAME>.tftest.tf
 ├── README.md
 └── main.tf
 
-````
+```
 
 #### D. Code Organization
 
@@ -193,7 +197,7 @@ terraform-<PROVIDER>-<NAME>/
       Name = "example"
     }
   }
-````
+  ```
 
 **Variable and Output Ordering:**
 
@@ -359,6 +363,7 @@ Before considering code generation complete, verify:
 - [ ] README includes usage examples
 - [ ] Workspace created/verified in HCP Terraform
 - [ ] Initial run executed and plan reviewed
+- [ ] Unit tests for inputs and resources exist and succeed
 
 ---
 
@@ -384,3 +389,4 @@ Before considering code generation complete, verify:
 - [Module Development Best Practices](https://developer.hashicorp.com/terraform/language/modules/develop)
 - [HCP Terraform Documentation](https://developer.hashicorp.com/terraform/cloud-docs)
 - [Terraform Registry](https://registry.terraform.io/)
+- [Terraform Test Documentation](https://developer.hashicorp.com/terraform/language/tests)