Docs: clarify agent creation assumptions in Getting Started

docs/getting-started.md

@@ -27,8 +27,22 @@ python -c "import framework; import aden_tools; print('✓ Setup complete')"
 
 ## Building Your First Agent
 
+Agents are not included by default in a fresh clone.
+
+Agents are created using Claude Code or by manual creation in the
+exports/ directory. Until an agent exists, agent validation and run
+commands will fail.
+
 ### Option 1: Using Claude Code Skills (Recommended)
 
+This is the recommended way to create your first agent.
+
+**Requirements**
+
+- Anthropic (Claude) API access
+- Claude Code CLI installed
+- Unix-based shell (macOS, Linux, or Windows via WSL)
+
 ```bash
 # Install Claude Code skills (one-time)
 ./quickstart.sh
@@ -38,6 +52,7 @@ claude> /building-agents-construction
 ```
 
 Follow the interactive prompts to:
+
 1. Define your agent's goal
 2. Design the workflow (nodes and edges)
 3. Generate the agent package
@@ -138,6 +153,7 @@ export BRAVE_SEARCH_API_KEY="your-key-here"  # Optional, for web search
 ```
 
 Get your API keys:
+
 - **Anthropic**: [console.anthropic.com](https://console.anthropic.com/)
 - **OpenAI**: [platform.openai.com](https://platform.openai.com/)
 - **Brave Search**: [brave.com/search/api](https://brave.com/search/api/)