Agent instructions

[tameware]

1. Use snake_case for C and C++ code.
2. Follow TTD.

[Copilot]

Pull request overview

Adds an AGENTS.md document to guide contributors/agents on naming and test-driven development expectations for DDS changes.

Changes:

• Introduces naming guidance for C/C++ identifiers (favoring snake_case, with exceptions for legacy/public APIs).
• Documents a strict red-green-refactor TDD workflow and test structuring expectations (AAA, edge cases).

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

AGENTS.md:3

• The naming guidance here is incomplete compared to the repo’s established C++ naming rules (e.g., constants use PascalCase and macros use ALL_CAPS). Since this file is meant to guide agents/contributors, it should either include those rules or explicitly defer to .github/instructions/cpp.instructions.md to avoid inconsistent naming for new code.

For C and C++ code, use snake_case for functions, methods, variables, and parameters. For C++ types use PascalCase, and for member variables use snake_case with a trailing underscore.

[zzcgumn]

I have started work to create a set of specifications to help coding agents. I suggest we add a project AGENTS.md file either as part of this upcoming pull request or in a later one. Our .github/copilot-instructions.md file does also need to be updated.

[tameware]

I forgot that this was still a draft. I've promoted it. I'll merge it now with your approval, @zzcgumn - we can add your stuff to it when you're ready. I needed this because I found that Cursor was ignoring .github/copilot-instructions.md.