Add README with setup instructions

README.md

@@ -1,2 +1,53 @@
-Hello World
-Hello World
+# Testing
+
+Small repository used for experiments and [Sourcegraph Batch Changes](https://docs.sourcegraph.com/batch_changes). This document covers how to get a local copy and work with the batch specifications in this repo.
+
+## Prerequisites
+
+- [Git](https://git-scm.com/)
+- (Optional) [Sourcegraph CLI](https://docs.sourcegraph.com/cli) (`sg` or legacy `src`) if you want to serve or apply the `.batch.yaml` specs against a Sourcegraph instance
+
+## Clone the repository
+
+```bash
+git clone https://github.com/morgangauth/testing.git
+cd testing
+```
+
+To work on an existing feature branch (example):
+
+```bash
+git fetch origin cursor/project-setup-readme-1647
+git checkout cursor/project-setup-readme-1647
+```
+
+## What is in this repo
+
+| Item | Purpose |
+| --- | --- |
+| `hello-world.batch.yaml` | Example batch spec that matches repositories and appends text to `README.md` files via an Alpine container step |
+| `hello-world2.batch.yaml` | Example batch spec that imports changesets from an existing change |
+| `test.yaml`, `test.txt` | Scratch / test files |
+| `CODEOWNERS` | Default code owner assignments |
+
+There is no application runtime (no `package.json`, `requirements.txt`, or compiled binary to install). After cloning, you can edit the YAML files or batch specs directly.
+
+## Batch Changes (optional)
+
+If you use Sourcegraph Batch Changes:
+
+1. Install and authenticate the CLI per [Sourcegraph documentation](https://docs.sourcegraph.com/batch_changes).
+2. From this directory, you can validate or run a spec (exact flags depend on your CLI version), for example:
+
+   ```bash
+   # Example; replace with the command your Sourcegraph version documents
+   sg batch preview -f hello-world.batch.yaml
+   ```
+
+Refer to your organization’s Sourcegraph instance and docs for server URL, permissions, and whether preview/apply commands use `sg batch` or `src batch`.
+
+## Contributing
+
+1. Create a branch from `main`.
+2. Make changes and open a pull request.
+3. Note any new setup steps here so others can reproduce your workflow.