feat: react email skill improvements

[cpenned]

---

Summary by cubic

Reorganized the React Email skill under skills/react-email and expanded the docs for clearer setup, Tailwind usage, rendering, and sending. Added guidance for existing projects, assets, and common pitfalls.

• Refactors

  • Moved SKILL.md to skills/react-email/SKILL.md.
  • Consolidated references under skills/react-email/references/.
  • Added skills/react-email/README.md describing the skill structure and progressive loading.

• New Features

  • Added “existing project” setup with required deps (@react-email/preview-server) and package.json scripts.
  • Included Tailwind usage in templates and asset guidance.
  • Added common mistakes and best practices, plus a basic template and i18n guidance.
  • Clarified sending with Resend and linked the SENDING guide.

^{Written for commit e21776f. Summary will update on new commits.}

[changeset-bot]

⚠️ No Changeset found

Latest commit: e21776f

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Project	Deployment	Review	Updated (UTC)
react-email	Ready	Preview, Comment	Jan 27, 2026 4:50pm
react-email-demo	Ready	Preview, Comment	Jan 27, 2026 4:50pm

[cubic-dev-ai]

1 issue found across 7 files

Prompt for AI agents (all issues)

Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="skills/react-email/SKILL.md">

<violation number="1" location="skills/react-email/SKILL.md:408">
P2: SKILL.md exceeds the documented <350 line limit for core skill instructions, which breaks the progressive disclosure constraints. Consider moving detailed sections to references and trimming the core file below 350 lines.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[cubic-dev-ai]

1 issue found across 1 file (changes from recent commits).

Prompt for AI agents (all issues)

Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="skills/react-email/SKILL.md">

<violation number="1" location="skills/react-email/SKILL.md:273">
P2: The Tailwind config example imports only Tailwind and Img but uses Body, Container, and Button, so the snippet is not runnable. Include the missing components in the import to keep the example correct.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}