Add AGENTS.md to this repository for coding agent onboarding

Issue Description

This repository is missing an AGENTS.md file at the root. That file is used to onboard a coding agent (like GitHub Copilot's automation agents) so it can work efficiently and correctly in this codebase.

Providing high-quality, explicit repository instructions dramatically reduces:

• Broken or failing CI / build attempts
• Wasted exploration (grep/find excessive searches)
• Incorrect environment setup
• PR churn due to missing context

Required Action

Create a new AGENTS.md file in the repository root with the following high‑level sections (in this order):

1. Overview – What the project does, main technologies, primary entry points.
2. Code layout – Bullet list of important files / folders with brief purpose (Python modules, infra/Bicep, workflows, scripts, config). Omit trivial or generated files.
3. Running the code – Step‑by‑step environment setup (preferred Python version / tool, how to install deps, how to run main scripts). Prefer using GitHub Models if applicable over Azure-only model configs.
4. Running the tests – Exact commands to run the test suite (include any required env vars, virtualenv activation, or formatting/lint steps if enforced by CI).
5. Upgrading Python dependencies – How to add or upgrade a dependency (e.g., edit requirements.txt and run a pin/update command). Include any tools (pip, uv, etc.).
6. Release / build / deployment notes (if applicable) – Any scripts, workflows, or manual steps the agent must respect.
7. Conventions & gotchas – Linting rules, code style, required env vars, secrets handling, common pitfalls.
8. Validation checklist – A short ordered list the agent should follow before opening a PR (e.g., tests pass locally, formatting applied, no stray debug prints, etc.).
9. When to search – A closing note instructing the agent to trust AGENTS.md and only perform source-wide searches if information is missing or incorrect.

Authoring Guidelines (Summarized from canonical AGENTS.md guidance)

• Be explicit: Prefer concrete commands over prose (e.g., pytest -q not “run tests”).
• Verify every command before including it.
• List required environment variables and how they’re obtained.
• Document any non-obvious build or test ordering.
• Surface known flaky areas, hacks, or TODO hotspots if they affect modification strategy.
• Keep it concise but information-dense—optimize for an automated agent, not a marketing audience.

Example Skeleton

# AGENTS.md

## Overview
<1–3 paragraph summary>

## Code layout
- `agent.py` – Entry point for ...
- `checks/` – YAML definitions for automated repo code checks
- `infra/` – Bicep templates for infra provisioning
- `.github/workflows/` – CI/CD workflows
...

## Running the code
1. Create virtual environment: `python -m venv .venv && source .venv/bin/activate`
2. Install deps: `pip install -r requirements.txt`
3. Run main script: `python agent.py --help`

## Running the tests
```bash
source .venv/bin/activate
pytest -q

Upgrading Python dependencies

Edit requirements.txt, then: pip install -r requirements.txt and run tests.

Validation checklist

• Virtualenv active
• pytest -q passes
• No debug prints
• Updated docs if behavior changed

When to search

Only search the codebase if required info is missing or appears outdated.

Acceptance Criteria

• AGENTS.md exists at repository root
• Contains all required sections above
• Commands verified and minimal
• Provides actionable, agent-focused guidance

Adding this file will significantly improve automated contribution quality.

This issue was automatically created by the GitHub Repo Maintainer Agent.