fix: add react-compiler-runtime for React 18 support

[zbeyens]

Summary

• Add target: '18' to babel-plugin-react-compiler config in tsdown.config.ts
• Add [email protected] as dependency to all 46 packages with React peer dependency
• Fixes "Cannot find module 'react/compiler-runtime'" error for React 18 users

Problem

When using Plate.js >52.0.1 with React 18, users get:

Cannot find module 'react/compiler-runtime'

This happens because:

1. React Compiler was outputting code that imports from react/compiler-runtime (React 19 built-in)
2. React 18 doesn't have this module
3. The react-compiler-runtime polyfill package wasn't included

Solution

Per React Compiler docs:

• Set target: '18' to emit imports from react-compiler-runtime instead of react/compiler-runtime
• Add react-compiler-runtime as a dependency so it ships with the library

This works for both React 18 and React 19 users - the polyfill delegates to built-in APIs on React 19.

Test plan

• Install Plate in a fresh React 18 project
• Verify no "Cannot find module" error
• Verify React 19 projects still work

🤖 Generated with Claude Code

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Project	Deployment	Preview	Comments	Updated (UTC)
plate	Error			Dec 12, 2025 3:01pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 045a128

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 47 packages

Name	Type
@platejs/ai	Patch
@platejs/autoformat	Patch
@platejs/basic-nodes	Patch
@platejs/basic-styles	Patch
@platejs/callout	Patch
@platejs/caption	Patch
@platejs/code-block	Patch
@platejs/combobox	Patch
@platejs/comment	Patch
@platejs/core	Patch
@platejs/csv	Patch
@platejs/cursor	Patch
@platejs/date	Patch
@platejs/diff	Patch
@platejs/dnd	Patch
@platejs/docx	Patch
@platejs/emoji	Patch
@platejs/excalidraw	Patch
@platejs/find-replace	Patch
@platejs/floating	Patch
@platejs/indent	Patch
@platejs/juice	Patch
@platejs/layout	Patch
@platejs/link	Patch
@platejs/list	Patch
@platejs/list-classic	Patch
@platejs/markdown	Patch
@platejs/math	Patch
@platejs/media	Patch
@platejs/mention	Patch
@platejs/playwright	Patch
@platejs/resizable	Patch
@platejs/selection	Patch
@platejs/slash-command	Patch
@platejs/suggestion	Patch
@platejs/tabbable	Patch
@platejs/table	Patch
@platejs/tag	Patch
@platejs/toc	Patch
@platejs/toggle	Patch
@platejs/utils	Patch
@platejs/yjs	Patch
@udecode/cmdk	Patch
@udecode/cn	Patch
@udecode/react-hotkeys	Patch
@udecode/react-utils	Patch
platejs	Patch

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[claude]

Claude encountered an error —— View job

---

Creating changesets for React Compiler Runtime support

I'm creating changesets for the React 18 compatibility fix. This PR adds react-compiler-runtime as a dependency to all packages with React peer dependencies.

Todo List

• Read changeset guide at .claude/commands/changeset.md
• Check for existing changesets in .changeset directory
• Create individual changeset files for each affected package
• Commit all changeset files to the branch

Progress

No existing changesets found. Now creating individual changeset files for each of the 46 affected packages...

[zbeyens]

Fixes #4783

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