feat: upgrade shiki to v4 and prosemirror-highlight to v0.15.1

[nperez0111]

Summary

Upgrade shiki from v3 to v4 and prosemirror-highlight from v0.13.0 to v0.15.1 across the core and code-block packages.

Rationale

Shiki v4 includes a fix for the createdBundledHighlighter typo, Swift precompilation support, and requires Node.js >= 20. prosemirror-highlight v0.15.1 adds explicit shiki v4 compatibility.

Changes

• Bumped all @shikijs/* dependencies from ^3 to ^4 in @blocknote/code-block and @blocknote/core
• Bumped prosemirror-highlight from ^0.13.0 to ^0.15.1 in @blocknote/core
• Removed @shikijs/langs dependency (no longer needed)
• Renamed createdBundledHighlighter → createBundledHighlighter (typo fixed in shiki v4) in packages/code-block/src/shiki.bundle.ts and examples/04-theming/07-custom-code-block/src/shiki.bundle.ts
• Switched Swift from runtime JS regex conversion (@shikijs/langs/swift) to precompiled (@shikijs/langs-precompiled/swift), now supported in v4

Impact

No breaking API changes for BlockNote consumers. All language highlighting continues to work identically. Swift highlighting now uses precompiled grammars instead of runtime conversion, which is slightly more efficient.

Testing

• @blocknote/code-block: 4/4 tests pass
• @blocknote/core: 309 passed, 3 skipped (all pre-existing skips)
• Both packages build successfully

Checklist

• Code follows the project's coding standards.
• All existing tests pass.

Additional Notes

Swift was the only language still relying on non-precompiled grammars from @shikijs/langs. Shiki v4 added precompilation support for Swift, so all 50 supported languages now use @shikijs/langs-precompiled with the JavaScript regex engine (no WASM).

Summary by CodeRabbit

• Chores
  • Updated Shiki syntax highlighting library to version 4, replacing the previous v3 with improved highlighting capabilities and performance.
  • Bumped prosemirror-highlight dependency to the latest version for enhanced text processing.
  • Updated related Shiki modules and language packs to maintain compatibility with v4.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
blocknote	Ready	Preview	Apr 3, 2026 8:46am
blocknote-website	Error		Apr 3, 2026 8:46am

[coderabbitai]

📝 Walkthrough

Walkthrough

Upgrades Shiki.js library dependencies to version 4.x across multiple packages, updates bundled highlighter factory function references, and removes the deprecated @shikijs/langs dependency in favor of @shikijs/langs-precompiled.

Changes

Cohort / File(s)	Summary
Package.json Dependency Upgrades packages/code-block/package.json, packages/core/package.json	Bumped @shikijs/core, @shikijs/engine-javascript, @shikijs/langs-precompiled, @shikijs/themes, and @shikijs/types from ^3 to ^4. Removed @shikijs/langs entirely. Updated prosemirror-highlight from ^0.13.0 to ^0.15.1.
Shiki Bundle API Updates examples/04-theming/07-custom-code-block/src/shiki.bundle.ts, packages/code-block/src/shiki.bundle.ts	Replaced createdBundledHighlighter with createBundledHighlighter factory function. Updated Swift language module import path from @shikijs/langs/swift to @shikijs/langs-precompiled/swift.

Poem

🐰 A bundled upgrade hops our way,
Shiki v4 saves the day!
Old imports fade, new paths arise,
Pre-compiled languages—what a prize!
Our code block shines, fresh and bright,
Dependencies dance in morning light! ✨

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main changes: upgrading shiki to v4 and prosemirror-highlight to v0.15.1, which directly matches the primary objectives of the pull request.
Description check	✅ Passed	The description comprehensively covers all major sections from the template including Summary, Rationale, Changes, Impact, Testing, and Checklist with complete information about the upgrade scope and results.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/upgrade-shiki

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[coderabbitai]

🧹 Nitpick comments (1)

packages/code-block/package.json (1)

53-57: Declare a Node engine floor for the Shiki v4 bump.

Shiki v4 requires Node.js >= 20. Adding an explicit engines.node constraint prevents ambiguous installs and toolchain failures for consumers. The same declaration should also be added to packages/core/package.json, which also depends on Shiki v4.

Suggested patch for packages/code-block/package.json

 {
   "name": "@blocknote/code-block",
+  "engines": {
+    "node": ">=20"
+  },
   ...
 }

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@packages/code-block/package.json` around lines 53 - 57, Add an engines.node
constraint to declare Node >=20 for packages that depend on Shiki v4: in the
package.json where the Shiki v4 deps appear (the package listing the
"@shikijs/*" dependencies, e.g., the code-block package) add an "engines": {
"node": ">=20" } field; repeat the same addition to the package.json for the
core package that also depends on Shiki v4 so both packages explicitly require
Node.js 20 or later.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@packages/code-block/package.json`:
- Around line 53-57: Add an engines.node constraint to declare Node >=20 for
packages that depend on Shiki v4: in the package.json where the Shiki v4 deps
appear (the package listing the "@shikijs/*" dependencies, e.g., the code-block
package) add an "engines": { "node": ">=20" } field; repeat the same addition to
the package.json for the core package that also depends on Shiki v4 so both
packages explicitly require Node.js 20 or later.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 82893b5b-527c-466a-8b6c-a0333608afba

📥 Commits

Reviewing files that changed from the base of the PR and between bda3045 and c3e26c1.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (4)

• examples/04-theming/07-custom-code-block/src/shiki.bundle.ts
• packages/code-block/package.json
• packages/code-block/src/shiki.bundle.ts
• packages/core/package.json

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commit: c3e26c1