chore: remove deprecated ai/rsc

Author: samdenty

Diff for: packages/ai/core/prompt/index.ts

@@ -26,3 +26,5 @@ export type {
   ToolContent,
   UserContent,
 } from './message';
+export type { Prompt } from './prompt';
+export type { CallSettings } from './call-settings';

Diff for: packages/ai/core/types/index.ts

@@ -19,5 +19,5 @@ export type {
 export type { LanguageModelRequestMetadata } from './language-model-request-metadata';
 export type { LanguageModelResponseMetadata } from './language-model-response-metadata';
 export type { Provider } from './provider';
-export type { ProviderMetadata } from './provider-metadata';
+export type { ProviderOptions, ProviderMetadata } from './provider-metadata';
 export type { EmbeddingModelUsage, LanguageModelUsage } from './usage';

Diff for: packages/ai/internal/index.ts

@@ -0,0 +1,8 @@
+export { standardizePrompt } from '../core/prompt/standardize-prompt';
+export { prepareToolsAndToolChoice } from '../core/prompt/prepare-tools-and-tool-choice';
+export { prepareRetries } from '../core/prompt/prepare-retries';
+export { prepareCallSettings } from '../core/prompt/prepare-call-settings';
+export { convertToLanguageModelPrompt } from '../core/prompt/convert-to-language-model-prompt';
+export { calculateLanguageModelUsage } from '../core/types/usage';
+
+export * from '../util/constants';

Diff for: packages/ai/package.json

@@ -41,17 +41,17 @@
       "import": "./dist/index.mjs",
       "require": "./dist/index.js"
     },
+    "./internal": {
+      "types": "./dist/internal/index.d.ts",
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.js"
+    },
     "./test": {
       "types": "./test/dist/index.d.ts",
       "import": "./test/dist/index.mjs",
       "module": "./test/dist/index.mjs",
       "require": "./test/dist/index.js"
     },
-    "./rsc": {
-      "types": "./rsc/dist/index.d.ts",
-      "react-server": "./rsc/dist/rsc-server.mjs",
-      "import": "./rsc/dist/rsc-client.mjs"
-    },
     "./mcp-stdio": {
       "types": "./mcp-stdio/dist/index.d.ts",
       "import": "./mcp-stdio/dist/index.mjs",
@@ -81,14 +81,8 @@
     "zod": "3.23.8"
   },
   "peerDependencies": {
-    "react": "^18 || ^19 || ^19.0.0-rc",
     "zod": "^3.23.8"
   },
-  "peerDependenciesMeta": {
-    "react": {
-      "optional": true
-    }
-  },
   "engines": {
     "node": ">=18"
   },

Diff for: packages/ai/rsc/package.json

@@ -1,5 +1,5 @@
 {
-  "extends": "./node_modules/@vercel/ai-tsconfig/react-library.json",
+  "extends": "./node_modules/@vercel/ai-tsconfig/base.json",
   "compilerOptions": {
     "target": "ES2018",
     "stripInternal": true,

Diff for: packages/ai/tsconfig.json

@@ -9,47 +9,26 @@ export default defineConfig([
     dts: true,
     sourcemap: true,
   },
-  // Test utilities
+  // Internal APIs
   {
-    entry: ['test/index.ts'],
-    outDir: 'test/dist',
+    entry: ['internal/index.ts'],
+    // This bundle isn't actually used,
+    // we export the internal bundle with @internal from the root package
+    // and provide different types in package.json for the exports
+    // to save duplicating 40kb for bundle size
+    outDir: 'dist/internal',
     format: ['cjs', 'esm'],
     dts: true,
     sourcemap: true,
   },
-  // RSC APIs - shared client
-  {
-    // Entry is `.mts` as the entrypoints that import it will be ESM so it needs exact imports that includes the `.mjs` extension.
-    entry: ['rsc/rsc-shared.mts'],
-    outDir: 'rsc/dist',
-    format: ['esm'],
-    external: ['react', 'zod'],
-    dts: true,
-    sourcemap: true,
-  },
-  // RSC APIs - server, client
+  // Test utilities
   {
-    entry: ['rsc/rsc-server.ts', 'rsc/rsc-client.ts'],
-    outDir: 'rsc/dist',
-    format: ['esm'],
-    external: ['react', 'zod', /\/rsc-shared/],
+    entry: ['test/index.ts'],
+    outDir: 'test/dist',
+    format: ['cjs', 'esm'],
     dts: true,
     sourcemap: true,
   },
-  // RSC APIs - types
-  {
-    entry: ['rsc/index.ts'],
-    outDir: 'rsc/dist',
-    dts: true,
-    outExtension() {
-      return {
-        // It must be `.d.ts` instead of `.d.mts` to support node resolution.
-        // See https://github.com/vercel/ai/issues/1028.
-        dts: '.d.ts',
-        js: '.mjs',
-      };
-    },
-  },
   // MCP stdio
   {
     entry: ['mcp-stdio/index.ts'],

Diff for: packages/ai/tsup.config.ts

@@ -22,17 +22,24 @@
       "types": "./dist/index.d.ts",
       "import": "./dist/index.mjs",
       "require": "./dist/index.js"
+    },
+    "./rsc": {
+      "types": "./dist/rsc/index.d.ts",
+      "import": "./dist/rsc/index.mjs",
+      "require": "./dist/rsc/index.js"
     }
   },
   "files": [
     "dist/**/*",
     "CHANGELOG.md"
   ],
   "dependencies": {
+    "ai": "5.0.0-canary.0",
     "@ai-sdk/provider-utils": "3.0.0-canary.1",
     "@ai-sdk/ui-utils": "2.0.0-canary.1",
     "swr": "^2.2.5",
-    "throttleit": "2.1.0"
+    "throttleit": "2.1.0",
+    "jsondiffpatch": "0.6.0"
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^6.6.3",

Diff for: packages/react/package.json

@@ -2,26 +2,26 @@ import { LanguageModelV2 } from '@ai-sdk/provider';
 import { safeParseJSON } from '@ai-sdk/provider-utils';
 import { ReactNode } from 'react';
 import { z } from 'zod';
-import { CallSettings } from '../../core/prompt/call-settings';
-import { convertToLanguageModelPrompt } from '../../core/prompt/convert-to-language-model-prompt';
-import { prepareCallSettings } from '../../core/prompt/prepare-call-settings';
-import { prepareRetries } from '../../core/prompt/prepare-retries';
-import { prepareToolsAndToolChoice } from '../../core/prompt/prepare-tools-and-tool-choice';
-import { Prompt } from '../../core/prompt/prompt';
-import { standardizePrompt } from '../../core/prompt/standardize-prompt';
 import {
   CallWarning,
   FinishReason,
   ProviderMetadata,
+  ProviderOptions,
+  LanguageModelUsage,
   ToolChoice,
-} from '../../core/types';
-import { ProviderOptions } from '../../core/types/provider-metadata';
+  Prompt,
+  CallSettings,
+  InvalidToolArgumentsError,
+  NoSuchToolError,
+} from 'ai';
 import {
-  LanguageModelUsage,
   calculateLanguageModelUsage,
-} from '../../core/types/usage';
-import { InvalidToolArgumentsError } from '../../errors/invalid-tool-arguments-error';
-import { NoSuchToolError } from '../../errors/no-such-tool-error';
+  standardizePrompt,
+  prepareToolsAndToolChoice,
+  prepareRetries,
+  prepareCallSettings,
+  convertToLanguageModelPrompt,
+} from 'ai/internal';
 import { createResolvablePromise } from '../../util/create-resolvable-promise';
 import { isAsyncGenerator } from '../../util/is-async-generator';
 import { isGenerator } from '../../util/is-generator';

Diff for: packages/ai/rsc/ai-state.test.ts renamed to packages/react/src/rsc/ai-state.test.ts

@@ -1,4 +1,4 @@
-import { HANGING_STREAM_WARNING_TIME_MS } from '../../util/constants';
+import { HANGING_STREAM_WARNING_TIME_MS } from 'ai';
 import { createResolvablePromise } from '../../util/create-resolvable-promise';
 import { createSuspendedChunk } from './create-suspended-chunk';
 

Diff for: packages/ai/rsc/ai-state.tsx renamed to packages/react/src/rsc/ai-state.tsx

@@ -1,4 +1,4 @@
-import { HANGING_STREAM_WARNING_TIME_MS } from '../../util/constants';
+import { HANGING_STREAM_WARNING_TIME_MS } from 'ai';
 import { createResolvablePromise } from '../../util/create-resolvable-promise';
 import {
   STREAMABLE_VALUE_TYPE,

Diff for: packages/ai/rsc/index.ts renamed to packages/react/src/rsc/index.ts

@@ -0,0 +1,28 @@
+/**
+ * Creates a Promise with externally accessible resolve and reject functions.
+ *
+ * @template T - The type of the value that the Promise will resolve to.
+ * @returns An object containing:
+ *   - promise: A Promise that can be resolved or rejected externally.
+ *   - resolve: A function to resolve the Promise with a value of type T.
+ *   - reject: A function to reject the Promise with an error.
+ */
+export function createResolvablePromise<T = any>(): {
+  promise: Promise<T>;
+  resolve: (value: T) => void;
+  reject: (error: unknown) => void;
+} {
+  let resolve: (value: T) => void;
+  let reject: (error: unknown) => void;
+
+  const promise = new Promise<T>((res, rej) => {
+    resolve = res;
+    reject = rej;
+  });
+
+  return {
+    promise,
+    resolve: resolve!,
+    reject: reject!,
+  };
+}

Diff for: packages/ai/rsc/provider.tsx renamed to packages/react/src/rsc/provider.tsx

@@ -10,4 +10,38 @@ export default defineConfig([
     dts: true,
     sourcemap: true,
   },
+
+  // RSC APIs - shared client
+  {
+    // Entry is `.mts` as the entrypoints that import it will be ESM so it needs exact imports that includes the `.mjs` extension.
+    entry: ['src/rsc/rsc-shared.mts'],
+    outDir: 'dist/rsc',
+    format: ['esm'],
+    external: ['react', 'zod'],
+    dts: true,
+    sourcemap: true,
+  },
+  // RSC APIs - server, client
+  {
+    entry: ['src/rsc/rsc-server.ts', 'src/rsc/rsc-client.ts'],
+    outDir: 'dist/rsc',
+    format: ['esm'],
+    external: ['react', 'zod', /\/rsc-shared/],
+    dts: true,
+    sourcemap: true,
+  },
+  // RSC APIs - types
+  {
+    entry: ['src/rsc/index.ts'],
+    outDir: 'dist/rsc',
+    dts: true,
+    outExtension() {
+      return {
+        // It must be `.d.ts` instead of `.d.mts` to support node resolution.
+        // See https://github.com/vercel/ai/issues/1028.
+        dts: '.d.ts',
+        js: '.mjs',
+      };
+    },
+  },
 ]);

Diff for: packages/ai/rsc/rsc-client.ts renamed to packages/react/src/rsc/rsc-client.ts

@@ -9,7 +9,8 @@
     "forceConsistentCasingInFileNames": true,
     "inlineSources": false,
     "isolatedModules": true,
-    "moduleResolution": "node",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
     "noUnusedLocals": false,
     "noUnusedParameters": false,
     "preserveWatchOutput": true,