feat: add serving type generator, Vite plugin, and UI hooks

.gitignore

@@ -9,3 +9,6 @@ coverage
 *.tsbuildinfo
 
 .turbo
+
+# AppKit type generator caches
+.databricks

apps/dev-playground/client/src/appKitServingTypes.d.ts

@@ -0,0 +1,114 @@
+// Auto-generated by AppKit - DO NOT EDIT
+// Generated from serving endpoint OpenAPI schemas
+import "@databricks/appkit";
+import "@databricks/appkit-ui/react";
+
+declare module "@databricks/appkit" {
+  interface ServingEndpointRegistry {
+    default: {
+      request: {
+        messages?: {
+          role?: "user" | "assistant";
+          content?: string;
+        }[];
+        /** @openapi integer, nullable */
+        n?: number | null;
+        max_tokens?: number;
+        /** @openapi double, nullable */
+        top_p?: number | null;
+        reasoning_effort?: "low" | "medium" | "high" | null;
+        /** @openapi double, nullable */
+        temperature?: number | null;
+        stop?: string | string[] | null;
+      };
+      response: {
+        model?: string;
+        choices?: {
+          index?: number;
+          message?: {
+            role?: "user" | "assistant";
+            content?: string;
+          };
+          finish_reason?: string;
+        }[];
+        usage?: {
+          prompt_tokens?: number;
+          completion_tokens?: number;
+          total_tokens?: number;
+        } | null;
+        object?: string;
+        id?: string;
+        created?: number;
+      };
+      chunk: {
+        model?: string;
+        choices?: {
+          index?: number;
+          delta?: {
+            role?: "user" | "assistant";
+            content?: string;
+          };
+          finish_reason?: string | null;
+        }[];
+        object?: string;
+        id?: string;
+        created?: number;
+      };
+    };
+  }
+}
+
+declare module "@databricks/appkit-ui/react" {
+  interface ServingEndpointRegistry {
+    default: {
+      request: {
+        messages?: {
+          role?: "user" | "assistant";
+          content?: string;
+        }[];
+        /** @openapi integer, nullable */
+        n?: number | null;
+        max_tokens?: number;
+        /** @openapi double, nullable */
+        top_p?: number | null;
+        reasoning_effort?: "low" | "medium" | "high" | null;
+        /** @openapi double, nullable */
+        temperature?: number | null;
+        stop?: string | string[] | null;
+      };
+      response: {
+        model?: string;
+        choices?: {
+          index?: number;
+          message?: {
+            role?: "user" | "assistant";
+            content?: string;
+          };
+          finish_reason?: string;
+        }[];
+        usage?: {
+          prompt_tokens?: number;
+          completion_tokens?: number;
+          total_tokens?: number;
+        } | null;
+        object?: string;
+        id?: string;
+        created?: number;
+      };
+      chunk: {
+        model?: string;
+        choices?: {
+          index?: number;
+          delta?: {
+            role?: "user" | "assistant";
+            content?: string;
+          };
+          finish_reason?: string | null;
+        }[];
+        object?: string;
+        id?: string;
+        created?: number;
+      };
+    };
+  }
+}

docs/docs/api/appkit/Function.appKitServingTypesPlugin.md

@@ -0,0 +1,24 @@
+# Function: appKitServingTypesPlugin()
+
+```ts
+function appKitServingTypesPlugin(options?: AppKitServingTypesPluginOptions): Plugin$1;
+```
+
+Vite plugin to generate TypeScript types for AppKit serving endpoints.
+Fetches OpenAPI schemas from Databricks and generates a .d.ts with
+ServingEndpointRegistry module augmentation.
+
+Endpoint discovery order:
+1. Explicit `endpoints` option (override)
+2. AST extraction from server file (server/index.ts or server/server.ts)
+3. DATABRICKS_SERVING_ENDPOINT_NAME env var (single default endpoint)
+
+## Parameters
+
+| Parameter | Type |
+| ------ | ------ |
+| `options?` | `AppKitServingTypesPluginOptions` |
+
+## Returns
+
+`Plugin$1`

docs/docs/api/appkit/Function.extractServingEndpoints.md

@@ -0,0 +1,24 @@
+# Function: extractServingEndpoints()
+
+```ts
+function extractServingEndpoints(serverFilePath: string): 
+  | Record<string, EndpointConfig>
+  | null;
+```
+
+Extract serving endpoint config from a server file by AST-parsing it.
+Looks for `serving({ endpoints: { alias: { env: "..." }, ... } })` calls
+and extracts the endpoint alias names and their environment variable mappings.
+
+## Parameters
+
+| Parameter | Type | Description |
+| ------ | ------ | ------ |
+| `serverFilePath` | `string` | Absolute path to the server entry file |
+
+## Returns
+
+  \| `Record`\<`string`, [`EndpointConfig`](Interface.EndpointConfig.md)\>
+  \| `null`
+
+Extracted endpoint config, or null if not found or not extractable

docs/docs/api/appkit/Function.findServerFile.md

@@ -0,0 +1,19 @@
+# Function: findServerFile()
+
+```ts
+function findServerFile(basePath: string): string | null;
+```
+
+Find the server entry file by checking candidate paths in order.
+
+## Parameters
+
+| Parameter | Type | Description |
+| ------ | ------ | ------ |
+| `basePath` | `string` | Project root directory to search from |
+
+## Returns
+
+`string` \| `null`
+
+Absolute path to the server file, or null if none found

docs/docs/api/appkit/index.md

@@ -70,9 +70,12 @@ plugin architecture, and React integration.
 
 | Function | Description |
 | ------ | ------ |
+| [appKitServingTypesPlugin](Function.appKitServingTypesPlugin.md) | Vite plugin to generate TypeScript types for AppKit serving endpoints. Fetches OpenAPI schemas from Databricks and generates a .d.ts with ServingEndpointRegistry module augmentation. |
 | [appKitTypesPlugin](Function.appKitTypesPlugin.md) | Vite plugin to generate types for AppKit queries. Calls generateFromEntryPoint under the hood. |
 | [createApp](Function.createApp.md) | Bootstraps AppKit with the provided configuration. |
 | [createLakebasePool](Function.createLakebasePool.md) | Create a Lakebase pool with appkit's logger integration. Telemetry automatically uses appkit's OpenTelemetry configuration via global registry. |
+| [extractServingEndpoints](Function.extractServingEndpoints.md) | Extract serving endpoint config from a server file by AST-parsing it. Looks for `serving({ endpoints: { alias: { env: "..." }, ... } })` calls and extracts the endpoint alias names and their environment variable mappings. |
+| [findServerFile](Function.findServerFile.md) | Find the server entry file by checking candidate paths in order. |
 | [generateDatabaseCredential](Function.generateDatabaseCredential.md) | Generate OAuth credentials for Postgres database connection using the proper Postgres API. |
 | [getExecutionContext](Function.getExecutionContext.md) | Get the current execution context. |
 | [getLakebaseOrmConfig](Function.getLakebaseOrmConfig.md) | Get Lakebase connection configuration for ORMs that don't accept pg.Pool directly. |

docs/docs/api/appkit/typedoc-sidebar.ts

@@ -225,6 +225,11 @@ const typedocSidebar: SidebarsConfig = {
       type: "category",
       label: "Functions",
       items: [
+        {
+          type: "doc",
+          id: "api/appkit/Function.appKitServingTypesPlugin",
+          label: "appKitServingTypesPlugin"
+        },
         {
           type: "doc",
           id: "api/appkit/Function.appKitTypesPlugin",
@@ -240,6 +245,16 @@ const typedocSidebar: SidebarsConfig = {
           id: "api/appkit/Function.createLakebasePool",
           label: "createLakebasePool"
         },
+        {
+          type: "doc",
+          id: "api/appkit/Function.extractServingEndpoints",
+          label: "extractServingEndpoints"
+        },
+        {
+          type: "doc",
+          id: "api/appkit/Function.findServerFile",
+          label: "findServerFile"
+        },
         {
           type: "doc",
           id: "api/appkit/Function.generateDatabaseCredential",