Add @tailwindcss/turbopack loader

[timneutkens]

Summary

• add a new @tailwindcss/turbopack package based on the webpack loader
• document Turbopack installation, configuration, and loader options
• register the package in the lockfile, integration overrides, and changelog

Test plan

• pnpm --filter @tailwindcss/turbopack build
• pnpm exec prettier --check on changed files
• verify loader source and build configuration match @tailwindcss/webpack byte-for-byte
• pnpm pack --pack-destination /tmp

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge, although the previously requested Turbopack integration coverage is still not executed by CI.

The instrumentation-label issue is fixed across the loader’s runtime paths. The new fixture exercises real initial generation and watch updates, but the integration workflow matrix does not select the turbopack directory, leaving that non-blocking coverage gap outstanding.

_{Reviews (3): Last reviewed commit: "Use default Turbopack mode in integratio..." | Re-trigger Greptile}

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ae0269ae-7340-48b4-bae1-d71b3c21d925

📥 Commits

Reviewing files that changed from the base of the PR and between 481bfc1 and 257dedc.

📒 Files selected for processing (1)

• integrations/turbopack/loader.test.ts

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Walkthrough

Adds the @tailwindcss/turbopack package configuration, CommonJS/ESM build outputs, loader instrumentation labels, documentation, workspace version override, and changelog entry. Adds an integration test that verifies Tailwind CSS output updates during a Next.js Turbopack development rebuild.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding the @tailwindcss/turbopack loader.
Description check	✅ Passed	The description matches the changeset, covering the new package, docs, lockfile overrides, and changelog.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 3

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 5d970c0e-53be-484b-866c-fd1ee361313d

📥 Commits

Reviewing files that changed from the base of the PR and between 6de87c6 and afac0af.

⛔ Files ignored due to path filters (1)

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

📒 Files selected for processing (8)

• CHANGELOG.md
• integrations/utils.ts
• packages/@tailwindcss-turbopack/README.md
• packages/@tailwindcss-turbopack/package.json
• packages/@tailwindcss-turbopack/src/index.cts
• packages/@tailwindcss-turbopack/src/index.ts
• packages/@tailwindcss-turbopack/tsconfig.json
• packages/@tailwindcss-turbopack/tsup.config.ts