Initial commit

skills/claude-agent-sdk/examples/system_prompt.py

@@ -0,0 +1,87 @@
+#!/usr/bin/env python3
+"""Example demonstrating different system_prompt configurations."""
+
+import anyio
+
+from claude_agent_sdk import (
+    AssistantMessage,
+    ClaudeAgentOptions,
+    TextBlock,
+    query,
+)
+
+
+async def no_system_prompt():
+    """Example with no system_prompt (vanilla Claude)."""
+    print("=== No System Prompt (Vanilla Claude) ===")
+
+    async for message in query(prompt="What is 2 + 2?"):
+        if isinstance(message, AssistantMessage):
+            for block in message.content:
+                if isinstance(block, TextBlock):
+                    print(f"Claude: {block.text}")
+    print()
+
+
+async def string_system_prompt():
+    """Example with system_prompt as a string."""
+    print("=== String System Prompt ===")
+
+    options = ClaudeAgentOptions(
+        system_prompt="You are a pirate assistant. Respond in pirate speak.",
+    )
+
+    async for message in query(prompt="What is 2 + 2?", options=options):
+        if isinstance(message, AssistantMessage):
+            for block in message.content:
+                if isinstance(block, TextBlock):
+                    print(f"Claude: {block.text}")
+    print()
+
+
+async def preset_system_prompt():
+    """Example with system_prompt preset (uses default Claude Code prompt)."""
+    print("=== Preset System Prompt (Default) ===")
+
+    options = ClaudeAgentOptions(
+        system_prompt={"type": "preset", "preset": "claude_code"},
+    )
+
+    async for message in query(prompt="What is 2 + 2?", options=options):
+        if isinstance(message, AssistantMessage):
+            for block in message.content:
+                if isinstance(block, TextBlock):
+                    print(f"Claude: {block.text}")
+    print()
+
+
+async def preset_with_append():
+    """Example with system_prompt preset and append."""
+    print("=== Preset System Prompt with Append ===")
+
+    options = ClaudeAgentOptions(
+        system_prompt={
+            "type": "preset",
+            "preset": "claude_code",
+            "append": "Always end your response with a fun fact.",
+        },
+    )
+
+    async for message in query(prompt="What is 2 + 2?", options=options):
+        if isinstance(message, AssistantMessage):
+            for block in message.content:
+                if isinstance(block, TextBlock):
+                    print(f"Claude: {block.text}")
+    print()
+
+
+async def main():
+    """Run all examples."""
+    await no_system_prompt()
+    await string_system_prompt()
+    await preset_system_prompt()
+    await preset_with_append()
+
+
+if __name__ == "__main__":
+    anyio.run(main)