fix: show MCP config file paths correctly in error messages

server/aws-lsp-codewhisperer/src/language-server/agenticChat/tools/mcp/mcpManager.test.ts

@@ -1489,8 +1489,37 @@ describe('McpManager error handling', () => {
         // Test that getConfigLoadErrors returns the expected error messages
         const errors = mgr.getConfigLoadErrors()
         expect(errors).to.not.be.undefined
-        expect(errors).to.include('File: file1.json, Error: File not found error')
-        expect(errors).to.include('File: serverA, Error: Missing command error')
+        expect(errors).to.include('File: `file1.json`, Error: File not found error')
+        expect(errors).to.include('File: `serverA`, Error: Missing command error')
+    })
+
+    it('wraps file paths in code spans so Windows paths render correctly in markdown', async () => {
+        // A Windows path segment like "\.aws" would have its backslash stripped when
+        // rendered as markdown unless the path is wrapped in a code span.
+        const windowsPath = 'C:\\Users\\me\\.aws\\amazonq\\mcp.json'
+        const mockErrors = new Map<string, string>([[windowsPath, 'Invalid JSON error']])
+
+        loadStub = sinon.stub(mcpUtils, 'loadAgentConfig').resolves({
+            servers: new Map(),
+            serverNameMapping: new Map(),
+            errors: mockErrors,
+            agentConfig: {
+                name: 'test-agent',
+                description: 'Test agent',
+                mcpServers: {},
+                tools: [],
+                allowedTools: [],
+                toolsSettings: {},
+                includedFiles: [],
+                resources: [],
+            },
+        })
+
+        const mgr = await McpManager.init([], features)
+        await mgr.discoverAllServers()
+
+        const errors = mgr.getConfigLoadErrors()
+        expect(errors).to.include(`File: \`${windowsPath}\`, Error: Invalid JSON error`)
     })
 
     it('returns undefined when no errors exist', async () => {

server/aws-lsp-codewhisperer/src/language-server/agenticChat/tools/mcp/mcpManager.ts

@@ -1630,7 +1630,10 @@ export class McpManager {
                 if (server === 'registry') {
                     return error
                 }
-                return `File: ${server}, Error: ${error}`
+                // Wrap the file path/server name in a code span. This message is rendered
+                // as markdown in the UI, so an unescaped Windows path (e.g. a segment like
+                // "\.aws") would have its backslash stripped and be shown incorrectly.
+                return `File: \`${server}\`, Error: ${error}`
             })
             .join('\n\n')
     }

server/aws-lsp-codewhisperer/src/language-server/agenticChat/tools/mcp/mcpUtils.ts

@@ -74,7 +74,7 @@ export async function loadMcpServerConfigs(
         try {
             rawText = (await workspace.fs.readFile(fsPath)).toString()
         } catch (e: any) {
-            const errorMsg = `Failed to read MCP config at ${fsPath}: ${e.message}`
+            const errorMsg = `Failed to read MCP config at \`${fsPath}\`: ${e.message}`
             logging.warn(errorMsg)
             configErrors.set(`${fsPath}`, errorMsg)
             continue
@@ -84,14 +84,14 @@ export async function loadMcpServerConfigs(
         try {
             json = JSON.parse(rawText)
         } catch (e: any) {
-            const errorMsg = `Invalid JSON in MCP config at ${fsPath}: ${e.message}`
+            const errorMsg = `Invalid JSON in MCP config at \`${fsPath}\`: ${e.message}`
             logging.warn(errorMsg)
             configErrors.set(`${fsPath}`, errorMsg)
             continue
         }
 
         if (!json.mcpServers || typeof json.mcpServers !== 'object') {
-            const errorMsg = `MCP config at ${fsPath} missing or invalid 'mcpServers' field`
+            const errorMsg = `MCP config at \`${fsPath}\` missing or invalid 'mcpServers' field`
             logging.warn(errorMsg)
             configErrors.set(`${fsPath}`, errorMsg)
             continue