Create agents.md file for AI agent context

[ryanwilson]

Add a baseline agents.md file for improved Jules and gemini CLI behaviour.

[gemini-code-assist]

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 in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

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 issue 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 is currently in preview and 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 to provide feedback.

[ncooke3]

It might be worth getting it to generate context on the env vars we use within the Package.swift. Here's a short writeup that you could paste in or add to prompt to regenerate:

---

• FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: When passed, sets the dependency on the https://github.com/google/GoogleAppMeasurement.git package to use the main branch. This is done to keep the Firebase package's main branch building when it depends on unreleased changes in the GoogleAppMeasurement package's main branch.
• FIREBASECI_USE_LOCAL_FIRESTORE_ZIP: When passed, looks for a local FirebaseFirestoreInternal.xcframework framework at the root of the repo to resolve the Firestore target. Used for testing incombination with scripts/check_firestore_symbols.sh.
• FIREBASE_SOURCE_FIRESTORE: When passed, builds Firestore's large C++ dependencies (abseil, gRPC, BoringSSL) from source rather than, by default, using existing binaries.

To enable an env var within Xcode, quit the current Xcode instance, and open it from the command line, passing each desired env var with the --env argument.

open --env FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT --env FIREBASE_SOURCE_FIRESTORE Package.swift 

To unset the env vars, quit the running Xcode instance.

[ncooke3]

nice!