feat(clerk-js): Remove BroadcastChannel build variant

[jacekradko]

Description

Removing the custom variant for testing out BroadcastChannel functionality. This functionality is now part of the core browser build

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

Summary by CodeRabbit

• Chores
  • Removed the BroadcastChannel build variant and related development infrastructure (build configs, dev script, and build-time flag).
  • Stopped watching the channel bundle in bundle size checks.
  • Removed the build flag from test configuration.
  • Added an empty changeset placeholder file.

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[changeset-bot]

🦋 Changeset detected

Latest commit: ec96517

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

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Project	Deployment	Preview	Comments	Updated (UTC)
clerk-js-sandbox	Ready	Preview	Comment	Nov 25, 2025 2:57am

[coderabbitai]

Walkthrough

Removes the clerkChannelBrowser build variant and its BroadcastChannel preset: deletes the preset export, build-time flag, dev script, bundlewatch entry, and associated rspack/vitest/type declarations across several config and source files.

Changes

Cohort / File(s)	Change Summary
Integration & Presets integration/presets/envs.ts	Removed withBroadcastChannel local declaration and its export from the envs list.
Rspack build config packages/clerk-js/rspack.config.js	Removed clerkChannelBrowser variant, its mapping in variantToSourceFile, its DefinePlugin flag, and all dev/prod config entries and merges related to this variant.
Package scripts packages/clerk-js/package.json	Removed the dev:channel npm script.
Bundle monitoring packages/clerk-js/bundlewatch.config.json	Removed the entry for ./dist/clerk.channel.browser.js.
Type & test defs packages/clerk-js/src/global.d.ts, packages/clerk-js/vitest.config.mts	Deleted the declare const __BUILD_VARIANT_CHANNEL__: boolean; and removed __BUILD_VARIANT_CHANNEL__ from Vitest define config.
Meta / changeset .changeset/nice-planes-glow.md	Added new changeset file (placeholder content).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Mostly consistent removals across configs and declarations.
• Pay attention to:
  • Any remaining references to clerkChannelBrowser or __BUILD_VARIANT_CHANNEL__ in the repo (search).
  • Build/test pipelines or CI configs that may still expect the removed script or artifact.
  • Bundlewatch thresholds if other entries rely on the removed file.

Poem

🐰 I nudged a variant out to roam,
I folded flags and sent scripts home.
A tiny hop, a cleaner view —
The build-light bounces, fresh and new. 🥕

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately summarizes the main change: removing the BroadcastChannel build variant from clerk-js, which is confirmed across all file modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/remove-channel-variant

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📥 Commits

Reviewing files that changed from the base of the PR and between 5ee3680 and ec96517.

📒 Files selected for processing (1)

• .changeset/nice-planes-glow.md (1 hunks)

✅ Files skipped from review due to trivial changes (1)

• .changeset/nice-planes-glow.md

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commit: ec96517