Add README.md

Initial commit with project description, getting started, rationale,
design, and license information.

README.md

@@ -0,0 +1,41 @@
+# prompts
+
+prompts is an MIT-licensed collection of LLM prompts by
+[@sneak](https://sneak.berlin), including development policy prompts and other
+useful prompts for working with large language models.
+
+## Getting Started
+
+```bash
+git clone https://github.com/sneak/prompts.git
+cd prompts
+```
+
+Prompts are stored as Markdown files in the repository root.  Copy or
+reference them as needed in your projects.
+
+## Rationale
+
+LLM prompts, especially development policies, benefit from version control
+and a single authoritative source.  This repo provides a central place to
+maintain, share, and evolve prompts across projects.
+
+## Design
+
+The repository is a flat collection of Markdown files.  Each file contains
+one or more related prompts or policy documents.  There is no build step or
+runtime component; the prompts are consumed by copying them into other
+projects or referencing them directly.
+
+## TODO
+
+- Add more prompt templates for common development tasks
+- Add CI to lint Markdown
+
+## License
+
+MIT.  See [LICENSE](LICENSE).
+
+## Author
+
+[@sneak](https://sneak.berlin)