sonzai 1.0.0

Python SDK for the Sonzai Character Engine API

Sonzai Python SDK

The official Python SDK for the Sonzai Character Engine API. Build AI characters with persistent memory, evolving personality, and proactive behaviors.

Installation

pip install sonzai

Quick Start

from sonzai import Sonzai

client = Sonzai(api_key="your-api-key")

# Chat with an agent
response = client.agents.chat(
    "your-agent-id",
    messages=[{"role": "user", "content": "Hello! What's your favorite hobby?"}],
    user_id="user-123",
)
print(response.content)

client.close()

Authentication

Get your API key from the Sonzai Dashboard under Projects > API Keys.

# Pass directly
client = Sonzai(api_key="sk-...")

# Or set the environment variable
# export SONZAI_API_KEY=sk-...
client = Sonzai()

Usage

Chat (Streaming)

for event in client.agents.chat(
    "agent-id",
    messages=[{"role": "user", "content": "Tell me a story"}],
    stream=True,
):
    print(event.content, end="", flush=True)

Chat (Non-streaming)

response = client.agents.chat(
    "agent-id",
    messages=[{"role": "user", "content": "Hello!"}],
    user_id="user-123",
    session_id="session-456",  # optional, auto-created if omitted
)
print(response.content)
print(f"Tokens used: {response.usage.total_tokens}")

Chat (Advanced Options)

response = client.agents.chat(
    "agent-id",
    messages=[{"role": "user", "content": "Hello!"}],
    user_id="user-123",
    user_display_name="Alex",
    provider="openai",
    model="gpt-4o",
    language="en",
    timezone="America/New_York",
    compiled_system_prompt="You are a helpful assistant.",
    tool_capabilities={"web_search": True, "remember_name": True, "image_generation": False},
    tool_definitions=[
        {"name": "get_weather", "description": "Get current weather", "parameters": {"type": "object", "properties": {"city": {"type": "string"}}}},
    ],
)

Memory

# Get memory tree
memory = client.agents.memory.list("agent-id", user_id="user-123")
for node in memory.nodes:
    print(f"{node.title} (importance: {node.importance})")

# Search memories
results = client.agents.memory.search("agent-id", query="favorite food")
for fact in results.results:
    print(f"{fact.content} (score: {fact.score})")

# Get memory timeline
timeline = client.agents.memory.timeline(
    "agent-id",
    user_id="user-123",
    start="2026-01-01",
    end="2026-03-01",
)

Personality

personality = client.agents.personality.get("agent-id")
print(f"Name: {personality.profile.name}")
print(f"Openness: {personality.profile.big5.openness.score}")
print(f"Warmth: {personality.profile.dimensions.warmth}/10")

Sessions

# Start a session
client.agents.sessions.start(
    "agent-id",
    user_id="user-123",
    session_id="session-456",
)

# ... chat messages ...

# End a session
client.agents.sessions.end(
    "agent-id",
    user_id="user-123",
    session_id="session-456",
    total_messages=10,
    duration_seconds=300,
)

Agent Instances

# List instances
instances = client.agents.instances.list("agent-id")

# Create a new instance
instance = client.agents.instances.create("agent-id", name="Test Instance")
print(f"Created: {instance.instance_id}")

# Reset an instance
client.agents.instances.reset("agent-id", instance.instance_id)

# Delete an instance
client.agents.instances.delete("agent-id", instance.instance_id)

Notifications

# Get pending notifications
notifications = client.agents.notifications.list("agent-id", status="pending")
for n in notifications.notifications:
    print(f"[{n.check_type}] {n.generated_message}")

# Consume a notification
client.agents.notifications.consume("agent-id", n.message_id)

# Get notification history
history = client.agents.notifications.history("agent-id")

Context Engine Data

# Mood
mood = client.agents.get_mood("agent-id", user_id="user-123")

# Relationships
relationships = client.agents.get_relationships("agent-id", user_id="user-123")

# Habits, Goals, Interests
habits = client.agents.get_habits("agent-id")
goals = client.agents.get_goals("agent-id")
interests = client.agents.get_interests("agent-id")

# Diary
diary = client.agents.get_diary("agent-id")

# Users
users = client.agents.get_users("agent-id")

Evaluation

# Evaluate an agent
result = client.agents.evaluate(
    "agent-id",
    messages=[
        {"role": "user", "content": "I'm feeling sad today"},
        {"role": "assistant", "content": "I'm sorry to hear that..."},
    ],
    template_id="template-uuid",
)
print(f"Score: {result.score}")
print(f"Feedback: {result.feedback}")

Simulation

# Run a simulation (streaming — launches run, then streams events)
for event in client.agents.simulate(
    "agent-id",
    user_persona={
        "name": "Alex",
        "background": "College student",
        "personality_traits": ["curious", "friendly"],
        "communication_style": "casual",
    },
    config={
        "max_sessions": 3,
        "max_turns_per_session": 10,
    },
):
    print(f"[{event.type}] {event.message}")

# Fire-and-forget (returns RunRef immediately)
ref = client.agents.simulate_async(
    "agent-id",
    user_persona={"name": "Alex", "background": "Student"},
    config={"max_sessions": 2},
)
print(f"Run started: {ref.run_id}")

# Reconnect to stream later (supports resuming via from_index)
for event in client.eval_runs.stream_events(ref.run_id, from_index=0):
    print(f"[{event.type}] {event.message}")

Run Eval (Simulation + Evaluation)

# Combined simulation + evaluation
for event in client.agents.run_eval(
    "agent-id",
    template_id="template-uuid",
    user_persona={"name": "Alex", "background": "Student"},
    simulation_config={"max_sessions": 2, "max_turns_per_session": 5},
):
    print(f"[{event.type}] {event.message}")

# Fire-and-forget
ref = client.agents.run_eval_async(
    "agent-id",
    template_id="template-uuid",
    simulation_config={"max_sessions": 2},
)
print(f"Run started: {ref.run_id}")

Re-evaluate (Eval Only)

# Re-evaluate an existing run with a different template
for event in client.agents.eval_only(
    "agent-id",
    template_id="new-template-uuid",
    source_run_id="existing-run-uuid",
):
    print(f"[{event.type}] {event.message}")

Custom States

# Create a custom state
state = client.agents.custom_states.create(
    "agent-id",
    key="player_level",
    value={"level": 15, "xp": 2400},
    scope="user",
    content_type="json",
    user_id="user-123",
)

# List states
states = client.agents.custom_states.list("agent-id", scope="global")

# Upsert by composite key (create or update)
state = client.agents.custom_states.upsert(
    "agent-id",
    key="player_level",
    value={"level": 16, "xp": 3000},
    scope="user",
    user_id="user-123",
)

# Get by composite key
state = client.agents.custom_states.get_by_key(
    "agent-id",
    key="player_level",
    scope="user",
    user_id="user-123",
)

# Delete by composite key
client.agents.custom_states.delete_by_key(
    "agent-id",
    key="player_level",
    scope="user",
    user_id="user-123",
)

Eval Templates

# List templates
templates = client.eval_templates.list()

# Create a template
template = client.eval_templates.create(
    name="Empathy Check",
    scoring_rubric="Evaluate emotional awareness and response quality",
    categories=[
        {"name": "Emotional Awareness", "weight": 0.5, "criteria": "..."},
        {"name": "Response Quality", "weight": 0.5, "criteria": "..."},
    ],
)

# Update a template
client.eval_templates.update(template.id, name="Updated Name")

# Delete a template
client.eval_templates.delete(template.id)

Eval Runs

# List eval runs
runs = client.eval_runs.list(agent_id="agent-id")

# Get a specific run
run = client.eval_runs.get("run-id")
print(f"Status: {run.status}, Turns: {run.total_turns}")

# Stream events from a running eval (reconnectable)
for event in client.eval_runs.stream_events("run-id"):
    print(f"[{event.type}] {event.message}")

# Delete a run
client.eval_runs.delete("run-id")

Async Support

Every method is also available as an async variant:

import asyncio
from sonzai import AsyncSonzai

async def main():
    async with AsyncSonzai(api_key="your-api-key") as client:
        # Non-streaming
        response = await client.agents.chat(
            "agent-id",
            messages=[{"role": "user", "content": "Hello!"}],
        )
        print(response.content)

        # Streaming
        async for event in await client.agents.chat(
            "agent-id",
            messages=[{"role": "user", "content": "Tell me a story"}],
            stream=True,
        ):
            print(event.content, end="", flush=True)

asyncio.run(main())

Configuration

client = Sonzai(
    api_key="sk-...",            # or SONZAI_API_KEY env var
    base_url="https://api.sonz.ai",  # or SONZAI_BASE_URL env var
    timeout=30.0,                # request timeout in seconds
    max_retries=2,               # retry count for failed requests
)

Error Handling

from sonzai import (
    Sonzai,
    AuthenticationError,
    NotFoundError,
    BadRequestError,
    RateLimitError,
    InternalServerError,
    SonzaiError,
)

try:
    response = client.agents.chat("agent-id", messages=[...])
except AuthenticationError:
    print("Invalid API key")
except NotFoundError:
    print("Agent not found")
except RateLimitError:
    print("Rate limit exceeded, try again later")
except SonzaiError as e:
    print(f"API error: {e}")

Development

# Clone the repo
git clone https://github.com/sonz-ai/sonzai-python.git
cd sonzai-python

# Install dev dependencies
pip install -e ".[dev]"

# Run tests
pytest

# Lint
ruff check src/

# Type check
mypy src/

License

MIT License - see LICENSE for details.