agentkit-sdk 0.3.4

Developer SDK for building personalized voice AI assistants

AgentKit

A developer SDK for building personalized voice AI assistants with memory, learning, and mobile APK generation.

AgentKit is to personal AI assistants what Firebase is to apps — a complete backend + mobile shell that you configure once and deploy in under 30 minutes.

Features

• Voice Pipeline — Streaming STT → LLM → TTS with <500ms first-audio latency
• Memory System — Markdown (simple) or Qdrant vector (semantic search)
• Learning Engine — Detects corrections, learns from mistakes, makes proactive recommendations
• Multi-provider — Sarvam/Deepgram (STT), Gemini/OpenAI (LLM), Sarvam/ElevenLabs (TTS)
• Mobile Shell — React Native app with VoiceOrb interface, builds to Android APK
• CLI — init, serve, build, deploy commands for the full lifecycle

Quick Start

# Install
pip install agentkit-sdk

# Create a new agent project (interactive)
agentkit init my-agent

# Enter the project
cd my-agent

# Add your API keys
# Edit .env and fill in the required keys

# Start the server
agentkit serve

The server starts at http://localhost:8000 with:

• Playground: http://localhost:8000/playground — browser-based test UI
• WebSocket: ws://localhost:8000/ws/voice — real-time voice/text endpoint
• Health: http://localhost:8000/health — server status check
• REST: POST /api/chat — text chat endpoint

CLI Commands

Command	Description
agentkit init <name>	Interactive project setup — picks providers, generates config
agentkit serve	Start FastAPI server with playground
agentkit serve --validate-only	Check config without starting
agentkit build android	Build Android APK from AgentShell template
agentkit deploy --platform railway	Deploy to Railway
agentkit deploy --platform render	Deploy to Render
agentkit deploy --platform docker	Generate Dockerfile

Configuration

agent.config.yaml — generated by agentkit init:

agent:
  name: my-agent
  persona: "You are a helpful personal assistant..."
  language: hinglish  # english / hindi / hinglish

voice:
  enabled: true
  stt:
    provider: sarvam    # sarvam / deepgram
    api_key: ${SARVAM_API_KEY}
  tts:
    provider: sarvam    # sarvam / elevenlabs
    voice: meera
    api_key: ${SARVAM_API_KEY}

llm:
  provider: gemini      # gemini / openai
  model: gemini-2.0-flash
  api_key: ${GEMINI_API_KEY}
  temperature: 0.7

memory:
  type: markdown        # markdown / vector
  backend: local        # local / qdrant
  episodic_window: 20
  semantic_top_k: 5

learning:
  enabled: true
  correction_detection: true
  implicit_feedback: true
  profile_extraction: true

deployment:
  type: self-host
  port: 8000

API keys are referenced as ${VAR_NAME} and resolved from your .env file at startup.

Custom Providers

Every provider slot (STT, LLM, TTS, Memory) is pluggable. Use a built-in name or a dotted import path to your own class:

# Built-in provider
llm:
  provider: gemini

# Custom provider — any class that extends BaseLLM
llm:
  provider: my_package.llm.OllamaLLM
  api_key: ${OLLAMA_API_KEY}
  model: llama3
  base_url: http://localhost:11434

Your custom class must extend the appropriate base class (BaseSTT, BaseLLM, BaseTTS, or BaseMemory). All config keys under the provider section are passed as constructor kwargs automatically.

Writing a custom LLM provider:

# my_package/llm.py
from agentkit.providers.llm.base import BaseLLM, Message

class OllamaLLM(BaseLLM):
    def __init__(self, api_key: str, model: str = "llama3", base_url: str = "http://localhost:11434", **kwargs):
        self.model = model
        self.base_url = base_url

    async def chat_stream(self, messages, system, memory_context=""):
        # Your streaming implementation
        ...

    async def chat(self, messages, system, memory_context=""):
        # Your non-streaming implementation
        ...

    async def close(self):
        pass

Registering at runtime (alternative to dotted paths):

from agentkit.providers import registry
from my_package.llm import OllamaLLM

registry.register("llm", "ollama", OllamaLLM)
# Now you can use provider: ollama in config

During agentkit init, select "custom" when prompted for a provider to enter your class path interactively.

Category	Base Class	Built-in Providers
STT	BaseSTT	sarvam, deepgram
LLM	BaseLLM	gemini, openai
TTS	BaseTTS	sarvam, elevenlabs
Memory	BaseMemory	markdown, vector

API Keys

Add these to your .env file based on your chosen providers:

Provider	Variable	Get it at
Sarvam AI	SARVAM_API_KEY	sarvam.ai
Gemini	GEMINI_API_KEY	aistudio.google.com
OpenAI	OPENAI_API_KEY	platform.openai.com
Deepgram	DEEPGRAM_API_KEY	deepgram.com
ElevenLabs	ELEVENLABS_API_KEY	elevenlabs.io

WebSocket Protocol

Connect to ws://localhost:8000/ws/voice and exchange JSON messages:

Send text:

{"type": "text", "text": "Hello, what's the weather?"}

Send audio:

{"type": "audio", "data": [/* byte array */]}

Receive responses:

{"type": "audio", "data": "base64-encoded-audio"}
{"type": "text", "text": "The assistant's text response"}
{"type": "done"}

Architecture

agentkit init → agent.config.yaml + .env
                        ↓
agentkit serve → FastAPI server
                  ├── /ws/voice (WebSocket)
                  ├── /api/chat (REST)
                  ├── /playground (browser UI)
                  └── /health
                        ↓
              STT → LLM → TTS (streaming pipeline)
                ↕         ↕
            Memory     Learning
          (md/vector)  (corrections)

Development

# Install in development mode
pip install -e ".[dev]"

# Run tests
pytest

# Lint
ruff check src/

License

MIT