[lexical-code] Breaking Change: Extract Prism code highlighting to @lexical/code-prism (with internal module @lexical/code-core to avoid circular import)

[etrepum]

Breaking Changes

Imports of Prism highlighting functionality should be changed from @lexical/code to @lexical/code-prism. These deprecated exports will be available for the next few versions of lexical (roughly ~0.47.0) to ease the transition.

• PrismTokenizer
• registerCodeHighlighting
• Tokenizer
• CODE_LANGUAGE_FRIENDLY_NAME_MAP
• CODE_LANGUAGE_MAP
• getCodeLanguageOptions
• getCodeLanguages
• getCodeThemeOptions
• getLanguageFriendlyName
• isCodeLanguageLoaded
• loadCodeLanguage
• normalizeCodeLang (also renamed to normalizeCodeLanguage in the move)

The dependency from @lexical/markdown to @lexical/code has been changed to a new (temporary) @lexical/code-core package to avoid a transitive dependency on Prism. If you are directly using @lexical/code functionality without an explicit dependency on @lexical/code you may need to add one to your package.json (and/or change the dependency to @lexical/code-core for now)

Previously deprecated exports from @lexical/code that were missing the $ prefixes have been removed.

Description

Moves the functionality from @lexical/code to internal package @lexical/code-core so that @lexical/code can maintain short term export compatibility for highlighting functionality.

Moves all Prism highlighting code to an independent @lexical/code-prism package

Closes #8197
Closes #5381

Test plan

Existing e2e, unit, and integration tests pass.

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Project	Deployment	Actions	Updated (UTC)
lexical	Ready	Preview, Comment	Mar 8, 2026 7:54pm
lexical-playground	Ready	Preview, Comment	Mar 8, 2026 7:54pm