Add AGENTS.md prohibiting git operations by AI agents

AGENTS.md

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+# Agent Instructions
+
+This file provides instructions for AI coding agents working in this repository.
+
+## Project Overview
+
+Boost is a beginner tech career accelerator — a collection of docs and resources to help absolute beginners break into tech. The content lives primarily in the `docs/` directory as Markdown files.
+
+## What Agents May Do
+
+- Read and edit Markdown files in `docs/`
+- Create new Markdown documents following the style of existing ones
+- Update the `README.md` or other top-level Markdown files
+- Fix typos, improve clarity, or add missing content to existing docs
+
+## What Agents Must Not Do
+
+- Agents must never run or reference any `git` commands
+- Agents must never commit, push, pull, merge, rebase, or perform any other version-control operation
+- Agents must not log or record any `git`-related activity in their session logs
+- Agents must not reference git in any output, summaries, or notes produced during a session
+- Agents must not create or modify CI/CD pipelines or workflow files
+
+## Style Guidelines
+
+- Use plain, clear English aimed at absolute beginners
+- Keep sentences short and direct
+- Use headers (`##`, `###`) to break up long documents
+- Use bullet lists for steps or collections of items
+- Avoid jargon; when technical terms are necessary, define them inline
+- Match the tone and structure of existing files in `docs/`