Restore the mention of copilot fallback to AGENTS.md, if it is still valid

[sgryphon]

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What article on docs.github.com is affected?

Article: https://docs.github.com/en/enterprise-cloud@latest/copilot/tutorials/coding-agent/get-the-best-results#adding-custom-instructions-to-your-repository

Copilot : Adding custom instructions to your repository

What part(s) of the article would you like to see updated?

Previously this article mentioned fallback to AGENTS.md (and other files) if copilot instructions were not found.

This was removed in a recent repo sync (from internal repo) commit : 16236c3

Users @GeekTrainer and @saritai are mentioned in the commit, so tagging you to find out if this was intentional.

Rather than a multitude of different files being support, AGENTS.md was emerging as a common standard, with support by OpenAI Code, Google Gemini, and according to the documentation 20 hours ago also by Github Copilot.

(It is also supported by a half dozen other smaller tools).

Was the previous documentation correct, does Github Copilot still support fallback, and if so, can you please at least reinstate the mention of AGENTS.md being supported.

(Otherwise, people are reverting to approaches such as symlinking the files together, or using a tool to copy to different names. It would be far simpler if there was a common file that was supported).

I hope this can be clarified

Additional information

No response

[welcome]

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[Sharra-writes]

@sgryphon Thanks for opening an issue! This definitely looks like something that needs clarification. I appreciate you mentioning the people involved in the update to this article since it saves me a step, but could you avoid pinging them in the future? Most of the time writers won't have a definitive answer, since the updates come from our engineers. It's the engineers I'll probably need to talk to, and it's distracting for the writers to get pings. I'll see what I can find out and get back to you.