feat: AI code completion & intellisense for python editor

.github/workflows/ci-ui-test.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: "20.x"
+          node-version: "22.x"
           cache: npm
 
       - name: Install dependencies

.gitignore

@@ -26,3 +26,5 @@ playground/
 .turbo
 styles.css
 .aider*
+app_templates/
+local/

package.json

@@ -6,44 +6,44 @@
 		"src/ui",
 		"tests/e2e"
 	],
-  "engines": {
-    "node": "22.x.x",
-    "npm": "10.x.x"
-  },
+	"engines": {
+		"node": "22.x.x",
+		"npm": "10.x.x"
+	},
 	"scripts": {
 		"build": "npm run ui:build && npm run apps:build && npm run ui:codegen",
 		"test": "npm run --if-present -ws test",
 		"lint": "npm run --if-present -ws lint",
 		"dev": "npm run -w writer-ui dev",
 		"custom.dev": "npm run -w writer-ui custom.dev",
-
 		"cli:test": "pytest tests -o log_cli=true ",
 		"cli:lint": "mypy ./src/writer --exclude app_templates/* && ruff check",
 		"cli:build": "npm run ui:codegen",
-
-	  	"ui:codegen": "npm run -w writer-ui codegen",
+		"ui:codegen": "npm run -w writer-ui codegen",
 		"ui:dev": "npm run -w writer-ui dev",
 		"ui:build": "npm run -w writer-ui build",
 		"ui:preview": "npm run -w writer-ui preview",
 		"ui:custom.build": "npm run -w writer-ui custom.build",
 		"ui:custom.check": "npm run -w writer-ui custom.check",
 		"ui:lint": "npm run -w writer-ui lint",
 		"ui:lint.ci": "npm run -w writer-ui lint.ci",
-
 		"e2e": "npm run -w writer-e2e e2e",
 		"e2e:setup": "npm run -w writer-e2e e2e:setup",
 		"e2e:ui": "npm run -w writer-e2e e2e:ui",
 		"e2e:ci": "npm run -w writer-e2e e2e:ci",
 		"e2e:firefox": "npm run -w writer-e2e e2e:firefox",
 		"e2e:chromium": "npm run -w writer-e2e e2e:chromium",
 		"e2e:webkit": "npm run -w writer-e2e e2e:webkit",
-
 		"apps:build": "cp -R ./apps/hello ./src/writer/app_templates/ && cp -R ./apps/default ./src/writer/app_templates/",
 		"codegen": "npm run ui:codegen",
 		"ld:upload-sourcemaps": "./scripts/upload-sourcemaps.sh",
 		"build:with-sourcemaps": "npm run ui:build && npm run ld:upload-sourcemaps"
 	},
 	"devDependencies": {
 		"playwright": "^1.57.0"
+	},
+	"dependencies": {
+		"monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^24.2.0",
+		"vscode": "npm:@codingame/monaco-vscode-extension-api@^24.2.0"
 	}
 }

pyproject.toml

@@ -55,6 +55,7 @@ writer-sdk = ">= 2.3.1, < 3"
 python-multipart = ">=0.0.7, < 1"
 orjson = "^3.11.0, <4"
 launchdarkly-server-sdk = "^9.12.0"
+python-lsp-server = {extras = ["all"], version = "^1.12.0"}
 
 [tool.poetry.group.build]
 optional = true

src/ui/package.json

@@ -4,7 +4,7 @@
 	"type": "module",
 	"scripts": {
 		"dev": "vite",
-		"build": "vite build",
+		"build": "NODE_OPTIONS=--max-old-space-size=8192 vite build",
 		"preview": "vite preview --port 5050",
 		"lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs --fix --ignore-path ../../.gitignore --ignore-path .gitignore",
 		"lint.ci": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs --ignore-path ../../.gitignore --ignore-path .gitignore",
@@ -18,10 +18,15 @@
 	"dependencies": {
 		"@apache-arrow/ts": "^15.0.2",
 		"@chamaeleonidae/chmln": "^1.0.1",
+		"@codingame/monaco-vscode-api": "^24.2.0",
+		"@codingame/monaco-vscode-languages-service-override": "^24.2.0",
+		"@codingame/monaco-vscode-textmate-service-override": "^24.2.0",
 		"@floating-ui/vue": "^1.1.5",
 		"@fontsource/poppins": "^5.0.14",
 		"@fullstory/browser": "^2.0.6",
 		"@googlemaps/js-api-loader": "^1.16.6",
+		"@launchdarkly/observability": "^0.4.0",
+		"@launchdarkly/session-replay": "^0.4.5",
 		"@monaco-editor/loader": "^1.3.3",
 		"@tato30/vue-pdf": "^1.11.3",
 		"@tiptap/extension-document": "^3.0.7",
@@ -36,19 +41,22 @@
 		"arquero": "^5.2.0",
 		"attr-accept": "^2.2.5",
 		"chroma-js": "^2.4.2",
-		"@launchdarkly/observability": "^0.4.0",
-		"@launchdarkly/session-replay": "^0.4.5",
+		"fast-uri": "^3.1.0",
 		"launchdarkly-js-client-sdk": "^3.8.1",
 		"lucide": "^0.525.0",
 		"mapbox-gl": "^3.2.0",
 		"marked": "^12.0.1",
-		"monaco-editor": "^0.47.0",
+		"monaco-editor": "^0.52.0",
+		"monaco-languageclient": "^10.5.0",
+		"monacopilot": "^1.2.9",
 		"plotly.js-dist-min": "^2.35.2",
 		"pretty-bytes": "^6.1.1",
 		"typescript": "^5.4.3",
 		"vega": "^5.22.1",
 		"vega-embed": "^6.22.1",
 		"vega-lite": "^5.7.1",
+		"vscode-languageclient": "^9.0.1",
+		"vscode-ws-jsonrpc": "^3.5.0",
 		"vue": "^3.5.0",
 		"vue-dompurify-html": "^5.0.1"
 	},

src/ui/src/builder/BuilderApp.vue

@@ -176,6 +176,10 @@ import { defineAsyncComponentWithLoader } from "@/utils/defineAsyncComponentWith
 import BuilderAppSocketTimeoutModal from "./BuilderAppSocketTimeoutModal.vue";
 import { useSocketTimeout } from "./useSocketTimeout";
 import BlueprintsNavigationStack from "@/components/blueprints/BlueprintsNavigationStack.vue";
+import { setupCodeEditorSettings } from "@/composables/useCodeEditorSettings";
+
+// Setup code editor settings once at the root level
+setupCodeEditorSettings();
 
 provide(injectionKeys.isAutogenModalShown, ref(false));
 

src/ui/src/builder/BuilderEmbeddedCodeEditor.vue

@@ -3,9 +3,11 @@
 		ref="rootEl"
 		class="BuilderEmbeddedCodeEditor"
 		:class="{
-			'BuilderEmbeddedCodeEditor--full': variant === 'full',
-			'BuilderEmbeddedCodeEditor--halfScreen': variant === 'half-screen',
-			'BuilderEmbeddedCodeEditor--singleLine': variant === 'single-line',
+			'BuilderEmbeddedCodeEditor--full': props.variant === 'full',
+			'BuilderEmbeddedCodeEditor--halfScreen':
+				props.variant === 'half-screen',
+			'BuilderEmbeddedCodeEditor--singleLine':
+				props.variant === 'single-line',
 		}"
 	>
 		<div ref="editorContainerEl" class="editorContainer"></div>
@@ -18,16 +20,26 @@ import "./builderEditorWorker";
 import {
 	onMounted,
 	onUnmounted,
-	PropType,
+	type PropType,
 	toRefs,
 	useTemplateRef,
 	watch,
 } from "vue";
+import { syncModelWithLSP } from "./lsp/lspModelSync";
+import { setModelDiagnostics, setupLSPDiagnostics } from "./lsp/lspDiagnostics";
+import { useMonacopilot } from "../composables/useMonacopilot";
+import { useLogger } from "@/composables/useLogger";
+import { useCodeEditorSettings } from "@/composables/useCodeEditorSettings";
 
 const rootEl = useTemplateRef("rootEl");
 const editorContainerEl = useTemplateRef("editorContainerEl");
 const resizeObserver = new ResizeObserver(updateDimensions);
 let editor: monaco.editor.IStandaloneCodeEditor = null;
+let lspSyncDisposable: monaco.IDisposable | null = null;
+let diagnosticsDisposable: monaco.IDisposable | null = null;
+let monacopilotCleanup: (() => void) | null = null;
+
+const { diagnosticsEnabled, aiCompletionEnabled } = useCodeEditorSettings();
 
 type EditorVariant = "full" | "minimal" | "half-screen" | "single-line";
 
@@ -44,6 +56,8 @@ const props = defineProps({
 const { modelValue, disabled, language } = toRefs(props);
 const emit = defineEmits(["update:modelValue"]);
 
+const logger = useLogger();
+
 const VARIANTS_SETTINGS: Partial<
 	Record<
 		EditorVariant,
@@ -54,6 +68,7 @@ const VARIANTS_SETTINGS: Partial<
 		minimap: {
 			enabled: false,
 		},
+		tabCompletion: "on",
 	},
 	minimal: {
 		minimap: {
@@ -94,38 +109,146 @@ watch(disabled, (isNewDisabled) => {
 });
 
 watch(modelValue, (newCode) => {
-	if (editor.getValue() == newCode) return;
+	if (!editor || editor.getValue() === newCode) return;
 	editor.getModel().setValue(newCode);
 });
 
-watch(language, () => {
-	monaco.editor.setModelLanguage(editor.getModel(), language.value);
+watch(language, (newLang) => {
+	if (!editor) return;
+	const model = editor.getModel();
+	if (model.getLanguageId() === newLang) return;
+
+	// Dispose old LSP sync before changing language
+	if (lspSyncDisposable) {
+		lspSyncDisposable.dispose();
+		lspSyncDisposable = null;
+	}
+
+	// Change language
+	monaco.editor.setModelLanguage(model, newLang);
+
+	// Re-sync if new language is Python
+	if (newLang === "python") {
+		try {
+			lspSyncDisposable = syncModelWithLSP(model);
+		} catch (error) {
+			logger.error("Failed to re-sync model with LSP:", error);
+		}
+	}
+});
+
+watch(diagnosticsEnabled, (enabled) => {
+	if (
+		!editor ||
+		language.value !== "python" ||
+		props.variant === "single-line"
+	) {
+		return;
+	}
+
+	const model = editor.getModel();
+	if (model && language.value === "python") {
+		diagnosticsDisposable?.dispose();
+		if (enabled) {
+			diagnosticsDisposable = setupLSPDiagnostics(monaco);
+		}
+		model.setValue(model.getValue());
+	}
+});
+
+// Watch AI completion setting changes
+watch(aiCompletionEnabled, async (enabled) => {
+	if (
+		!editor ||
+		language.value !== "python" ||
+		props.variant === "single-line"
+	)
+		return;
+
+	if (enabled) {
+		// Enable AI completion
+		if (!monacopilotCleanup) {
+			try {
+				monacopilotCleanup = await useMonacopilot(
+					monaco,
+					editor,
+					language.value,
+				);
+			} catch (error) {
+				logger.error("Failed to enable AI completion:", error);
+			}
+		}
+	} else {
+		// Disable AI completion
+		if (monacopilotCleanup) {
+			monacopilotCleanup();
+			monacopilotCleanup = null;
+		}
+	}
 });
 
-onMounted(() => {
-	editor = monaco.editor.create(editorContainerEl.value, {
-		value: modelValue.value ?? "",
-		language: props.language,
+onMounted(async () => {
+	// Create model with proper URI for LSP
+	const modelUri = monaco.Uri.parse(`inmemory://model/${Date.now()}.py`);
+	const model = monaco.editor.createModel(
+		modelValue.value ?? "",
+		language.value || "python",
+		language.value === "python" ? modelUri : undefined,
+	);
+
+	editor = monaco.editor.create(editorContainerEl.value as HTMLElement, {
+		model: model,
 		readOnly: props.disabled,
 		fixedOverflowWidgets: true,
+		quickSuggestions: {
+			other: true,
+			comments: true,
+			strings: true,
+		},
 		...VARIANTS_SETTINGS[props.variant],
 	});
-	editor.getModel().onDidChangeContent(() => {
+
+	model.onDidChangeContent(() => {
 		const newCode = editor.getValue();
 		emit("update:modelValue", newCode);
 	});
-	resizeObserver.observe(rootEl.value);
+
+	resizeObserver.observe(rootEl.value as Element);
+
+	// Manually sync model with LSP for Python language
+	// This is required because we're in a browser (no filesystem)
+	if (language.value === "python" && props.variant !== "single-line") {
+		try {
+			lspSyncDisposable = syncModelWithLSP(model);
+		} catch (error) {
+			logger.error("Failed to sync model with LSP:", error);
+		}
+
+		// Register AI-powered code completions (if AI completion enabled)
+		if (aiCompletionEnabled.value) {
+			try {
+				monacopilotCleanup = await useMonacopilot(
+					monaco,
+					editor,
+					language.value,
+				);
+			} catch (error) {
+				logger.error("Failed to initialize monacopilot:", error);
+			}
+		}
+
+		diagnosticsDisposable?.dispose();
+		if (diagnosticsEnabled.value) {
+			diagnosticsDisposable = setupLSPDiagnostics(monaco);
+		}
+	}
 
 	// when in modal, focus the editor and set the cursor to the last line
 	if (props.variant === "half-screen") {
 		editor.focus();
 		editor.setPosition({
-			lineNumber: editor.getModel().getLineCount(),
-			column: editor
-				.getModel()
-				.getLineLastNonWhitespaceColumn(
-					editor.getModel().getLineCount(),
-				),
+			lineNumber: model.getLineCount(),
+			column: model.getLineLastNonWhitespaceColumn(model.getLineCount()),
 		});
 	}
 });
@@ -135,7 +258,32 @@ function updateDimensions() {
 }
 
 onUnmounted(() => {
-	editor.dispose();
+	// Clean up LSP sync
+	if (lspSyncDisposable) {
+		lspSyncDisposable.dispose();
+		lspSyncDisposable = null;
+	}
+
+	const model = editor?.getModel();
+
+	// Clear diagnostics before disposing model
+	if (model && language.value === "python") {
+		setModelDiagnostics(monaco, model, []);
+	}
+
+	if (editor) {
+		editor.dispose();
+	}
+	if (model) {
+		model.dispose();
+	}
+	if (monacopilotCleanup) {
+		monacopilotCleanup();
+	}
+	if (diagnosticsDisposable) {
+		diagnosticsDisposable.dispose();
+		diagnosticsDisposable = null;
+	}
 	resizeObserver.disconnect();
 });
 </script>