v0.2: Simplify spec + add MCP gateway integration

Major revision based on first principles thinking:
- Simplified format: plain Markdown, human readable
- Focus on capabilities (Can/Cannot) not API schemas
- MCP gateway pointer for structured tool access
- Clear positioning vs robots.txt and llms.txt

The agents.md file is the handshake.
The MCP gateway is where real work happens.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -0,0 +1,88 @@
+# agents.md
+
+**Tell AI agents what they can do on your website.**
+
+## The Gap
+
+| File | Purpose |
+|------|---------|
+| robots.txt | What bots **cannot access** |
+| llms.txt | What **content matters** |
+| **agents.md** | What agents **can do** |
+
+## Quick Start
+
+Create `/.well-known/agents.md`:
+
+```markdown
+# My Site
+
+An online bookstore.
+
+## Can
+- Search catalog
+- Read book details
+- Check availability
+
+## Cannot
+- Place orders (requires human)
+
+## Contact
+hello@mysite.com
+```
+
+That's it. Plain text. Human readable.
+
+## With MCP Gateway
+
+Point agents to your MCP server for structured tool access:
+
+```markdown
+# My Site
+
+An online bookstore.
+
+## Can
+- Search and browse
+- Check prices
+- Place orders (authenticated)
+
+## MCP
+endpoint: https://mysite.com/.well-known/mcp
+transport: streamable-http
+auth: oauth2
+
+## Contact
+hello@mysite.com
+```
+
+## How It Works
+
+```
+Agent requests /.well-known/agents.md
+              │
+              ├─► Basic: reads text, understands capabilities
+              │
+              └─► Advanced: connects to MCP gateway for tools
+```
+
+## Documentation
+
+- [Specification](./spec/README.md) - Full protocol spec
+- [Examples](./examples/) - Real-world examples
+- [FAQ](./docs/FAQ.md) - Common questions
+
+## Status
+
+**Draft** - Version 0.2.0
+
+## Related Standards
+
+- [robots.txt](https://www.rfc-editor.org/rfc/rfc9309) - Crawl restrictions (1994)
+- [llms.txt](https://llmstxt.org/) - Content for LLMs (2024)
+- [AGENTS.md](https://agents.md/) - Repository instructions (2025)
+- [MCP](https://modelcontextprotocol.io/) - Tool protocol (2024)
+
+## License
+
+CC0 1.0 Universal - Public Domain