ci: add CodeRabbit config (Gemini-sunset replacement reviewer)

[jeremylongshore]

Adds .coderabbit.yaml — CodeRabbit replacing Gemini (ceases 2026-07-17) as the umbrella's workhorse reviewer. Requires the CodeRabbit GitHub App installed on the intent-solutions-io org.

[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 CodeRabbit as the new automated review tool for the repository, replacing the outgoing Gemini Code Assist. The configuration includes tailored review profiles and strict path-specific instructions designed to maintain the integrity of the Intent Eval Platform's core artifacts and CI processes.

Highlights

• CodeRabbit Integration: Added a new .coderabbit.yaml configuration file to establish CodeRabbit as the primary automated code reviewer.
• Custom Review Instructions: Implemented specialized path-based instructions to enforce schema consistency, cross-artifact semantic integrity, and bash script safety.

Using Gemini Code Assist

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Invoking Gemini

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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.
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Customization

To customize the 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.

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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

This pull request adds the .coderabbit.yaml configuration file to integrate CodeRabbit reviews into the repository. The configuration specifies review profiles, path filters, and highly detailed instructions for path-specific reviews (such as schema consistency, cross-artifact drift, and script safety) to align with the repository's style and quality guidelines. There are no review comments, and I have no feedback to provide.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.