feat(cli): added dev:test-model cli command

[pavelgj]

cd js/testapps/basic-gemini
genkit dev:test-model googleai/gemini-3-flash-preview -- tsx src/index.ts

genkit dev:test-model --from-file=../../plugins/google-genai/tests/model-tests-tts.yaml  -- tsx src/index.ts

cd go
genkit dev:test-model googleai/gemini-3-flash-preview -- go run samples/basic/main.go

genkit dev:test-model --from-file=../js/plugins/google-genai/tests/model-tests-tts.yaml  -- go run samples/basic/main.go 

cd js/testapps/anthropic

genkit dev:test-model anthropic/claude-sonnet-4-5 -- tsx src/beta/basic.ts

Checklist (if applicable):

• PR title is following https://www.conventionalcommits.org/en/v1.0.0/
• Tested (manually, unit tested, etc.)
• Docs updated (updated docs or a docs bug required)

[gemini-code-assist]

Summary of Changes

Hello @pavelgj, 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 powerful new dev-test-model command to the Genkit CLI, designed to streamline the process of verifying AI model conformance. It allows developers to test models against the Genkit specification by either specifying supported capabilities directly or by providing comprehensive test suites through YAML or JSON files, ensuring models behave as expected across various interaction types and data modalities.

Highlights

• New CLI Command: Introduced a new dev-test-model command to the Genkit CLI for testing AI models.
• Model Conformance Testing: This command enables testing AI models against the Genkit model specification, ensuring they adhere to expected behaviors.
• Flexible Test Input: Supports testing specific model capabilities via command-line options or loading comprehensive test suites from external JSON or YAML files.
• Comprehensive Validators: Includes built-in validators for various model behaviors such as tool requests, structured output, multi-turn conversations, context handling, system roles, and different media inputs/outputs (images, video, audio).
• Dependency Update: Added the yaml package as a new dependency to facilitate parsing test suite files.

🧠 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.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

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 introduces a new dev-test-model CLI command, which is a great addition for testing model conformance. The implementation is comprehensive, covering various test cases and supporting both YAML and JSON for test definitions. I've provided a few suggestions to improve type safety by replacing any with proper types and type guards, and to make error handling more robust. I also suggested using Zod schema parsing instead of unsafe type casting to ensure runtime correctness.

[apascal07]

I don't love the name though. Maybe have a dev: prefix for similar future commands?

[pavelgj]

I don't love the name though. Maybe have a dev: prefix for similar future commands?

Yes! Done.