PydanticAI
Agent Readiness

from pydantic_ai import Agent

# System prompt includes user data - injectable!
agent = Agent(
    "openai:gpt-4",
    system_prompt=f"You help with {user_topic}. "
                  f"The user prefers {user_preference}."
)
result = await agent.run(user_query)

from pydantic_ai import Agent

# Static system prompt with structured deps
agent = Agent(
    "openai:gpt-4",
    system_prompt="You are a helpful assistant.",
    deps_type=UserContext,
)

@agent.system_prompt
def add_context(ctx: RunContext[UserContext]) -> str:
    # Context injected through typed deps, not strings
    return f"User topic: {ctx.deps.topic}"