feat: add rspack-split-chunks skill

[JSerFeng]

Summary

• add the new rspack-split-chunks skill
• add a source-backed repo-behavior.md reference with GitHub source links
• document the skill in the README

[gemini-code-assist]

Summary of Changes

Hello, 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 introduces a new skill designed to help users effectively diagnose and optimize their Rspack optimization.splitChunks configuration. It provides detailed guidance on best practices, common pitfalls, and specific recommendations for various optimization goals, backed by direct references to the Rspack source code. The aim is to improve production chunking, reduce module duplication, enhance caching, and debug over-fetching issues.

Highlights

• New Rspack Skill: Introduced a new rspack-split-chunks skill to diagnose and optimize Rspack's optimization.splitChunks configuration.
• Source-backed Reference: Added a repo-behavior.md file providing source-backed rationale and GitHub links for the splitChunks skill.
• Documentation Update: Documented the new rspack-split-chunks skill in the main README.md.

🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for GitHub and other Google products, sign up here.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

The pull request successfully adds the new rspack-split-chunks skill, including its SKILL.md and repo-behavior.md documentation. The README.md has been updated with the new skill's description and installation command. However, the Table of Contents in README.md needs to be updated to reflect the addition of this new skill.