Support for affects and affected by for adding work item links (#297)

Adding link types for affects and affected by

## GitHub issue number #269

## **Associated Risks**

None

## ✅ **PR Checklist**

- [x] **I have read the [contribution
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CONTRIBUTING.md)**
- [x] **I have read the [code of conduct
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CODE_OF_CONDUCT.md)**
- [x] Title of the pull request is clear and informative.
- [x] 👌 Code hygiene
- [x] 🔭 Telemetry added, updated, or N/A
- [x] 📄 Documentation added, updated, or N/A
- [x] 🛡️ Automated tests added, or N/A

## 🧪 **How did you test it?**

Updated tests and manual check

Author: danhellem

src/tools/workitems.ts

@@ -50,6 +50,10 @@ function getLinkTypeFromName(name: string) {
       return "Microsoft.VSTS.Common.TestedBy-Forward";
     case "tests":
       return "Microsoft.VSTS.Common.TestedBy-Reverse";
+    case "affects":
+      return "Microsoft.VSTS.Common.Affects-Forward";
+    case "affected by":
+      return "Microsoft.VSTS.Common.Affects-Reverse";
     default:
       throw new Error(`Unknown link type: ${name}`);
   }
@@ -678,10 +682,10 @@ function configureWorkItemTools(server: McpServer, tokenProvider: () => Promise<
             id: z.number().describe("The ID of the work item to update."),
             linkToId: z.number().describe("The ID of the work item to link to."),
             type: z
-              .enum(["parent", "child", "duplicate", "duplicate of", "related", "successor", "predecessor", "tested by", "tests"])
+              .enum(["parent", "child", "duplicate", "duplicate of", "related", "successor", "predecessor", "tested by", "tests", "affects", "affected by"])
               .default("related")
               .describe(
-                "Type of link to create between the work items. Options include 'parent', 'child', 'duplicate', 'duplicate of', 'related', 'successor', 'predecessor', 'tested by', 'tests', 'referenced by', and 'references'. Defaults to 'related'."
+                "Type of link to create between the work items. Options include 'parent', 'child', 'duplicate', 'duplicate of', 'related', 'successor', 'predecessor', 'tested by', 'tests', 'affects', and 'affected by'. Defaults to 'related'."
               ),
             comment: z.string().optional().describe("Optional comment to include with the link. This can be used to provide additional context for the link being created."),
           })

test/src/tools/workitems.test.ts

@@ -854,7 +854,7 @@ describe("configureWorkItemTools", () => {
       });
 
       // Test different link types to cover all branches in getLinkTypeFromName
-      const linkTypes = ["parent", "child", "duplicate", "duplicate of", "related", "successor", "predecessor", "tested by", "tests"];
+      const linkTypes = ["parent", "child", "duplicate", "duplicate of", "related", "successor", "predecessor", "tested by", "tests", "affects", "affected by"];
 
       for (const linkType of linkTypes) {
         const params = {
@@ -863,7 +863,7 @@ describe("configureWorkItemTools", () => {
             {
               id: 1,
               linkToId: 2,
-              type: linkType as "parent" | "child" | "duplicate" | "duplicate of" | "related" | "successor" | "predecessor" | "tested by" | "tests",
+              type: linkType as "parent" | "child" | "duplicate" | "duplicate of" | "related" | "successor" | "predecessor" | "tested by" | "tests" | "affects" | "affected by",
               comment: "Test comment",
             },
           ],