Add chat output renderer proposed API sample

.scripts/samples.ts

@@ -294,6 +294,7 @@ export const samples: Sample[] = [
 	{ description: 'authenticationprovider-sample', excludeFromReadme: true, path: 'authenticationprovider-sample', guide: null, apis: [], contributions: [] },
 	{ description: 'configuration-sample', excludeFromReadme: true, path: 'configuration-sample', guide: null, apis: [], contributions: [] },
 	{ description: 'chat-model-provider-sample', excludeFromReadme: true, path: 'chat-model-provider-sample', guide: null, apis: [], contributions: [] },
+	{ description: 'chat-output-renderer-sample', excludeFromReadme: true, path: 'chat-output-renderer-sample', guide: null, apis: [], contributions: [] },
 	{ description: 'contentprovider-sample', excludeFromReadme: true, path: 'contentprovider-sample', guide: null, apis: [], contributions: [] },
 	{ description: 'diagnostic-related-information-sample', excludeFromReadme: true, path: 'diagnostic-related-information-sample', guide: null, apis: [], contributions: [] },
 	{ description: 'document-paste', excludeFromReadme: true, path: 'document-paste', guide: null, apis: [], contributions: [] },

chat-output-renderer-sample/.gitignore

@@ -0,0 +1,5 @@
+out
+node_modules
+.vscode-test/
+*.vsix
+vscode*.d.ts

chat-output-renderer-sample/.vscode/launch.json

@@ -0,0 +1,21 @@
+// A launch configuration that compiles the extension and then opens it inside a new window
+// Use IntelliSense to learn about possible attributes.
+// Hover to view descriptions of existing attributes.
+// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+{
+	"version": "0.2.0",
+	"configurations": [{
+			"name": "Run Extension",
+			"type": "extensionHost",
+			"request": "launch",
+			"runtimeExecutable": "${execPath}",
+			"args": [
+				"--extensionDevelopmentPath=${workspaceFolder}"
+			],
+			"outFiles": [
+				"${workspaceFolder}/out/**/*.js"
+			],
+			"preLaunchTask": "npm: watch"
+		}
+	]
+}

chat-output-renderer-sample/.vscode/tasks.json

@@ -0,0 +1,20 @@
+// See https://go.microsoft.com/fwlink/?LinkId=733558
+// for the documentation about the tasks.json format
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "npm",
+			"script": "watch",
+			"problemMatcher": "$tsc-watch",
+			"isBackground": true,
+			"presentation": {
+				"reveal": "never"
+			},
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			}
+		}
+	]
+}

chat-output-renderer-sample/README.md

@@ -0,0 +1,12 @@
+# Chat Output Renderer sample
+
+This VS Code extension sample demonstrates usage of the proposed chat output renderer API. This API allows extensions to
+contribute custom rendered widgets into VS Code's chat interface. Language models can invoke tools to create these widgets. The widgets are rendered using VS Code's webview API.
+
+## Running the Sample
+
+- Make sure you are using VS Code 1.103 or newer.
+- Run `npm install` in terminal to install dependencies
+- Run the `Run Extension` target in the Debug View. This will:
+	- Start a task `npm: watch` to compile the code
+	- Run the extension in a new VS Code window

chat-output-renderer-sample/eslint.config.mjs

@@ -0,0 +1,44 @@
+/**
+ * ESLint configuration for the project.
+ * 
+ * See https://eslint.style and https://typescript-eslint.io for additional linting options.
+ */
+// @ts-check
+import js from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import stylistic from '@stylistic/eslint-plugin';
+
+export default tseslint.config(
+	{
+		ignores: [
+			'.vscode-test',
+			'out',
+		]
+	},
+	js.configs.recommended,
+	...tseslint.configs.recommended,
+	...tseslint.configs.stylistic,
+	{
+		plugins: {
+			'@stylistic': stylistic
+		},
+		rules: {
+			'curly': 'warn',
+			'@stylistic/semi': ['warn', 'always'],
+			'@typescript-eslint/no-empty-function': 'off',
+			'@typescript-eslint/naming-convention': [
+				'warn',
+				{
+					'selector': 'import',
+					'format': ['camelCase', 'PascalCase']
+				}
+			],
+			'@typescript-eslint/no-unused-vars': [
+				'error',
+				{
+					'argsIgnorePattern': '^_'
+				}
+			]
+		}
+	}
+);