Java: Add AGENTS.md — guidance for AI coding assistants contributing to the repo

Suggestion: Add an AGENTS.md file

Claude Code, GitHub Copilot, Cursor, and Gemini CLI now read an AGENTS.md file at the repo root to understand how to contribute. It's purpose-built for AI agents, similar to how CONTRIBUTING.md is for humans.

Semantic Kernel is a multi-language AI orchestration SDK — an AGENTS.md could help AI assistants navigate the codebase by covering:

• Which language SDK to look in for a given concept (Python vs C# vs Java)
• How to run the test suites in each language
• Conventions for adding new connectors or memory implementations
• Which files/patterns to study before modifying the planner or kernel
• Things to avoid (e.g., breaking cross-language API parity)

Why now

With AI-assisted development becoming the norm, many contributors to projects like this one use Claude Code, Copilot, or Cursor. A well-written AGENTS.md reduces incorrect assumptions and improves the quality of AI-generated PRs.

Projects like LangChain, Pydantic, and the OpenAI SDK have already adopted this convention.

Happy to contribute a draft if that would help.

Start by reading CONTRIBUTING.md and reviewing the repository structure for the Python, C#, and Java SDKs. Draft the root AGENTS.md around language selection, test commands, connector and memory conventions, planner or kernel files to study, and cross-language API parity; done means the guidance is complete and useful for AI-assisted contributors.