docs: add docs-en-improvement skill and remove old prompt file

[chenjiahan]

Summary

• Add new SKILL.md for English documentation improvement with clear guidelines
• Remove outdated docs-en-improvement.prompt.yml as it's replaced by the new skill

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[gemini-code-assist]

Summary of Changes

Hello @chenjiahan, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request streamlines and formalizes the process for enhancing English documentation. It replaces an older, less structured prompt file with a dedicated skill definition, providing explicit instructions and constraints for contributors working on English language improvements. This change aims to ensure consistency and quality in documentation updates.

Highlights

• New Documentation Skill: Introduced a new SKILL.md file that defines clear guidelines and steps for improving English documentation under website/docs/en.
• Prompt File Removal: Removed the docs-en-improvement.prompt.yml file, as its functionality is now superseded by the new skill definition.

Changelog

• .agents/skills/docs-en-improvement/SKILL.md
  • Added a new Markdown file outlining the docs-en-improvement skill.
  • Defined the purpose, steps, and constraints for improving English documentation.
  • Included guidelines on preserving meaning, checking mirrored Chinese files, PR title conventions, and language simplicity.
• .github/docs-en-improvement.prompt.yml
  • Removed the entire YAML file, which previously contained system messages for improving English documentation.

Activity

• No specific review comments or activity have been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request effectively transitions from an old prompt file to a new, more structured SKILL.md for English documentation improvements. The new skill definition is clear and well-organized. I have one minor suggestion to improve the consistency of file paths mentioned in the instructions.

[Copilot]

Pull request overview

This PR replaces an outdated prompt configuration with a new agent skill document for improving English documentation under website/docs/en.

Changes:

• Removed .github/docs-en-improvement.prompt.yml (old prompt-based config).
• Added .agents/skills/docs-en-improvement/SKILL.md defining the new docs-en-improvement skill and its usage constraints.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
.github/docs-en-improvement.prompt.yml	Removes the legacy prompt file now superseded by the skill.
.agents/skills/docs-en-improvement/SKILL.md	Adds a skill definition and guidelines for improving English docs under website/docs/en.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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