feat(amazonq): feature flag for / agents migration to agentic chat (aws#7565)

## Notes:
- Migrating the /Agents(/dev, /doc and /test) to Q Agentic chat
experience.
- This does not disturb other /agents like /review and /transform.

### TODO:
- Remove implementation code for above /agents from the VSC repository
in followup PR's.
---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

---------

Co-authored-by: laileni <[email protected]>
Co-authored-by: Laxman Reddy <[email protected]>

Author: Randall-Jiang

packages/amazonq/.changes/next-release/Feature-a37e21b7-a68f-4554-92c9-9db35c0a3e51.json

@@ -0,0 +1,4 @@
+{
+	"type": "Feature",
+	"description": "Amazon Q /test, /doc, and /dev capabilities integrated into Agentic coding."
+}

packages/amazonq/src/lsp/chat/commands.ts

@@ -8,7 +8,6 @@ import { window } from 'vscode'
 import { AmazonQChatViewProvider } from './webviewProvider'
 import { CodeScanIssue } from 'aws-core-vscode/codewhisperer'
 import { EditorContextExtractor } from 'aws-core-vscode/codewhispererChat'
-import { DefaultAmazonQAppInitContext } from 'aws-core-vscode/amazonq'
 
 /**
  * TODO: Re-enable these once we can figure out which path they're going to live in
@@ -20,13 +19,8 @@ export function registerCommands(provider: AmazonQChatViewProvider) {
         registerGenericCommand('aws.amazonq.refactorCode', 'Refactor', provider),
         registerGenericCommand('aws.amazonq.fixCode', 'Fix', provider),
         registerGenericCommand('aws.amazonq.optimizeCode', 'Optimize', provider),
-        Commands.register('aws.amazonq.generateUnitTests', async () => {
-            DefaultAmazonQAppInitContext.instance.getAppsToWebViewMessagePublisher().publish({
-                sender: 'testChat',
-                command: 'test',
-                type: 'chatMessage',
-            })
-        }),
+        registerGenericCommand('aws.amazonq.generateUnitTests', 'Generate Tests', provider),
+
         Commands.register('aws.amazonq.explainIssue', async (issue: CodeScanIssue) => {
             void focusAmazonQPanel().then(async () => {
                 const editorContextExtractor = new EditorContextExtractor()

packages/amazonq/src/lsp/client.ts

@@ -164,6 +164,7 @@ export async function startLanguageServer(
                         developerProfiles: true,
                         pinnedContextEnabled: true,
                         mcp: true,
+                        reroute: true,
                         modelSelection: true,
                         workspaceFilePath: vscode.workspace.workspaceFile?.fsPath,
                     },

packages/core/src/amazonq/webview/ui/quickActions/generator.ts

@@ -42,7 +42,6 @@ export class QuickActionGenerator {
         // TODO: Update acc to UX
         const quickActionCommands = [
             {
-                groupName: `Q Developer agentic capabilities`,
                 commands: [
                     ...(this.isFeatureDevEnabled && !this.disabledCommands.includes('/dev')
                         ? [

packages/core/src/amazonq/webview/ui/quickActions/handler.ts

@@ -177,15 +177,6 @@ export class QuickActionHandler {
             return
         }
 
-        /**
-         * right click -> generate test has no tab id
-         * we have to manually create one if a testgen tab
-         * wasn't previously created
-         */
-        if (!tabID) {
-            tabID = this.mynahUI.updateStore('', {})
-        }
-
         // if there is no test tab, open a new one
         const affectedTabId: string | undefined = this.addTab(tabID)