Support JSON Prompt Files For Deno Functions

[BrookRichardson]

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I am using a Supabase backend for server-side edge functions, and the code there runs in Deno.
Deno does not natively support YAML files, but it does support JSON.

Can Models please add support for JSON files?

[Akash1134]

Hello @BrookRichardson,

Thank you for your feedback about adding JSON support for prompt files in GitHub Models. You've raised an important compatibility point regarding Deno environments, which don't natively support YAML files.

Currently, as documented, GitHub Models only supports storing prompts in .prompt.yml or .prompt.yaml format. This limitation creates challenges for developers working with Deno-based environments like Supabase edge functions.

We appreciate you bringing this to our attention. Adding JSON as a supported prompt file format would be a valuable enhancement for Deno users and others who prefer or require JSON over YAML. Your feedback has been noted and shared with our product team.

While we can't provide a specific timeline for when JSON support might be added, this is the type of practical developer feedback that helps us prioritize improvements to GitHub Models during this public preview period.

In the meantime, if you need a workaround, you might consider:

1. Using a YAML-to-JSON converter in your deployment pipeline. There are several libraries that can help with this:

   • js-yaml for JavaScript environments
   • For Deno specifically, you can use yaml_Deno which is a WebAssembly-based YAML parser

2. Keeping your prompt configurations in YAML for GitHub Models, but converting them to JSON when deploying to your Deno environment using a pre-deployment script

For more information about the current prompt file format specification, you can refer to our documentation:

• Storing prompts in GitHub repositories
• Optimizing your AI-powered app with Models

If you'd like to join the conversation with other developers using GitHub Models, check out the GitHub Models discussion.

Thank you again for helping us improve GitHub Models by highlighting this compatibility issue.

[KateCatlin]

Hey @BrookRichardson thanks for this post! You're one of many people who are asking for .prompt.json file support, so thanks for another upvote on this. I'm trying to fit this into scope before we got GA :) I'll leave this open for other folks to chime in and upvote if interested!