refactor(react): source /ai-sdk server defs from the React-free core (drop the React re-export)

Author: bendersej

.changeset/tanstack-ai-adapter.md

@@ -8,3 +8,4 @@ Add a TanStack AI adapter (the `/tanstack-ai` subpath) for client-side tool call
 - `@simplepdf/embed/tanstack-ai`: `simplePDFToolDefinitions()` (server, for `chat({ tools })`) and `createSimplePDFTools({ embed })` (browser `.client()` tools for `clientTools(...)` then `useChat({ tools })`).
 - `@simplepdf/react-embed-pdf/tanstack-ai`: `useEmbedTools(embedRef)`, the editor-bound client tools. Server definitions stay in the React-free core `@simplepdf/embed/tanstack-ai`, so a server route never pulls React in.
 - `@tanstack/ai` is a new optional peer, pulled only by the `/tanstack-ai` subpath; the package roots stay free of it (and of `zod`).
+- `@simplepdf/react-embed-pdf` `/ai-sdk` no longer re-exports `simplePDFToolDefinitions`; import the server-side definitions from the React-free core `@simplepdf/embed/ai-sdk` (re-exporting them from the React package pulled React into server routes). The browser-side `createSimplePDFExecutor` is still re-exported, so both React adapters are consistent: server defs live only in the core. Released as a minor: the only consumer is copilot, updated in lockstep.

react/README.md

@@ -223,7 +223,7 @@ const CopilotEditor = () => {
 };
 ```
 
-For server-side tool definitions (execute-less, for `streamText`), import `simplePDFToolDefinitions` from the React-free core `@simplepdf/embed/ai-sdk` (importing it from this React subpath would pull React into your server). `embedRef.current` is the flat editor-actions handle, every camelCase operation, with the deprecated `selectTool` / `submit` overloads; subscribe to editor events via the `onEmbedEvent` prop. (The framework-free `@simplepdf/embed` core exposes the grouped `embed.actions` / `embed.events` / `embed.lifecycle` handle for non-React use.)
+For server-side tool definitions (execute-less, for `streamText`), import `simplePDFToolDefinitions` from the React-free core `@simplepdf/embed/ai-sdk` (it is intentionally not re-exported from this React subpath, which imports React). `embedRef.current` is the flat editor-actions handle, every camelCase operation, with the deprecated `selectTool` / `submit` overloads; subscribe to editor events via the `onEmbedEvent` prop. (The framework-free `@simplepdf/embed` core exposes the grouped `embed.actions` / `embed.events` / `embed.lifecycle` handle for non-React use.)
 
 #### Agentic: `useEmbedTools` (TanStack AI)
 

react/src/ai-sdk.tsx

@@ -1,4 +1,4 @@
-// The agentic surface for @simplepdf/react-embed-pdf — the React mirror of
+// The agentic surface for @simplepdf/react-embed-pdf: the React mirror of
 // @simplepdf/embed's /tools + /ai-sdk subpaths. Importing THIS module (not the package
 // root) is what pulls in `zod`, so a <EmbedPDF>-only app never loads it — the same
 // pay-for-use contract the core has. Pair it with useEmbed():
@@ -14,10 +14,11 @@ import { isSimplePDFToolName, routeToolCall, SIMPLEPDF_TOOLS, type SimplePDFTool
 import type { EmbedActions } from './embed-pdf';
 import { notMounted } from './not-mounted';
 
-// Re-export the core agentic surface so React consumers get everything from one subpath:
-// server-side tool definitions (execute-less, for streamText), the browser executor, and
-// the tool-name guard — mirroring @simplepdf/embed/ai-sdk + /tools.
-export { createSimplePDFExecutor, simplePDFToolDefinitions } from '@simplepdf/embed/ai-sdk';
+// Re-export the browser-side executor + the tool-name guard for React consumers. The
+// server-side `simplePDFToolDefinitions` is deliberately NOT re-exported: this module
+// imports React (for the hook), so re-exporting the defs would pull React into a server
+// `streamText` route. Import those from the React-free core `@simplepdf/embed/ai-sdk`.
+export { createSimplePDFExecutor } from '@simplepdf/embed/ai-sdk';
 export { isSimplePDFToolName };
 export type { SimplePDFToolName };