kaizen-client 0.1.2

Python SDK for the Kaizen Token Optimized Format (KTOF) service

Kaizen Python SDK

Typed async client, provider adapters, and helpers for working with the Kaizen Token Optimized Format (KTOF) service. This package lives inside the kaizen-sdks monorepo under python/ and mirrors the public Kaizen REST API exactly.

Before you start

1. Request access – Email [e-mail] for a production API key.
2. Environment variables – Export the following (or pass via KaizenClientConfig):
   • KAIZEN_BASE_URL – defaults to https://api.getkaizen.io/; override only when Kaizen provisions a dedicated host for you or you have an approved self-hosted deployment.
   • KAIZEN_API_KEY – bearer token used by the SDK.
   • KAIZEN_TIMEOUT – float seconds, default 30.

Tip: keep API keys in a .env file (gitignored) or your secret manager rather than hardcoding them.

3. Python version – 3.10 or newer.

Installation

cd python
uv pip install -e .[all]   # or: pip install -e .[all]

Optional extras enable provider adapters:

Extra	Purpose
gemini	Installs google-generativeai so kaizen_client.integrations.gemini can wrap Gemini 2.5 Flash.
openai	Installs openai for GPT-4/o integrations.
anthropic	Installs anthropic for Claude adapters.
all	Pulls every optional dependency plus tiktoken for token stats.

Hello, Kaizen!

import asyncio
import os

from kaizen_client import KaizenClient, KaizenClientConfig

async def main() -> None:
    config = KaizenClientConfig(
        api_key=os.environ["KAIZEN_API_KEY"],
        base_url=os.getenv("KAIZEN_BASE_URL", "https://api.getkaizen.io/"),
        timeout=float(os.getenv("KAIZEN_TIMEOUT", "30")),
    )
    async with KaizenClient(config) as client:
        encoded = await client.prompts_encode({
            "prompt": {
                "messages": [
                    {"role": "system", "content": "You are concise."},
                    {"role": "user", "content": "List 3 Kaizen benefits."},
                ]
            }
        })
        decoded = await client.prompts_decode({"ktof": encoded["result"]})
        print(decoded["result"])

asyncio.run(main())

## Managing the client lifecycle

Many apps only need a Kaizen client for the duration of a single workflow. Use the provided `with_kaizen_client` decorator to ensure the client is created (if missing) and closed automatically:

```python
from kaizen_client import with_kaizen_client

@with_kaizen_client()
async def compress_prompt(*, kaizen, messages):
    encoded = await kaizen.prompts_encode({"prompt": {"messages": messages}})
    return encoded["result"], encoded["stats"]

# Callers can optionally pass their own KaizenClient:
# await compress_prompt(messages=msgs, kaizen=my_existing_client)

Behind the scenes the decorator injects a kaizen keyword argument, so you can override it in tests or when reusing a long-lived client.

## Environment targets

- **Production (default):** `https://api.getkaizen.io/`.
- **Managed staging/internal:** if Kaizen hosts a dedicated env for you, set `KAIZEN_BASE_URL` to that URL.
- **Self-hosted / air-gapped (Enterprise tier):** contact `[e-mail]` to obtain the FastAPI build + deployment checklist before pointing `KAIZEN_BASE_URL` at your infrastructure.

Rotate API keys regularly and keep them in `.env` or your secret manager—never commit them to source control.

## High-level API surface

| Method | Endpoint | Description | Payload model |
|--------|----------|-------------|---------------|
| `compress()` | `POST /v1/compress` | Convert arbitrary JSON to KTOF while returning size stats. | `EncodeRequest` |
| `decompress()` | `POST /v1/decompress` | Expand KTOF back into structured JSON. | `DecodeRequest` |
| `optimize()` | `POST /v1/optimize` | Encode + compute `token_stats` in a single call. | `EncodeRequest` |
| `optimize_request()` | `POST /v1/optimize/request` | Compress an outbound provider request payload. | `OptimizeRequestPayload` |
| `optimize_response()` | `POST /v1/optimize/response` | Decompress a provider response payload. | `OptimizeResponsePayload` |
| `prompts_encode()` | `POST /v1/prompts/encode` | Auto-detect structured snippets in prompts and compress them. | `PromptEncodePayload` |
| `prompts_decode()` | `POST /v1/prompts/decode` | Retrieve a previously encoded prompt via `payload_id`/`ktof`. | `PromptDecodePayload` |
| `health()` | `GET /` | Lightweight liveness check against the Kaizen deployment. | None |

All methods accept either fully typed models from `kaizen_client.models` or plain dictionaries. Responses default to raw `dict` objects but can be validated into models by passing `response_model=...` to the private `_post` helper if you fork the client.

### Sample `prompts_encode` response

```json
{
  "operation": "prompts.encode",
  "status": "ok",
  "result": "KTOF:....",
  "stats": {"original_bytes": 1024, "compressed_bytes": 312, "reduction_ratio": 0.304},
  "token_stats": {"gpt-4o-mini": {"original": 210, "compressed": 68}},
  "metadata": {"example": "full-lifecycle"}
}

You can pass token_models to receive the token_stats block or omit it to skip tokenization entirely.

Provider integrations

kaizen_client.integrations exposes thin wrappers so you can keep your existing LLM client code and let Kaizen handle payload compression transparently:

• kaizen_client.integrations.openai.OpenAIKaizenWrapper: wraps openai.AsyncOpenAI / OpenAI.
• kaizen_client.integrations.anthropic.AnthropicKaizenWrapper: wraps anthropic.AsyncAnthropic / Anthropic.
• kaizen_client.integrations.gemini.GeminiKaizenWrapper: wraps google.generativeai.GenerativeModel.

Each integration accepts a KaizenClient (or config options) plus the vendor client. The decorators/mixins ensure prompts_encode is invoked before outbound calls and prompts_decode is applied to responses when needed. See the runnable snippets documented in examples/README.md for end-to-end usage.

Provider prerequisites

Integration	Extra dependency	Environment variables
OpenAI	openai	OPENAI_API_KEY, optional OPENAI_MODEL override
Anthropic	anthropic	ANTHROPIC_API_KEY, optional ANTHROPIC_MODEL override
Gemini	google-generativeai	GOOGLE_API_KEY, optional GOOGLE_MODEL override

KAIZEN_API_KEY is still required for every example; the additional keys authenticate with the respective LLM vendor. Configure them via .env, your process manager, or cloud secret manager before running the scripts.

⚠️ Current limitation: the Python wrappers instantiate the vendors' synchronous clients (OpenAI, anthropic.Anthropic, google.generativeai.GenerativeModel) inside async functions. Until the wrappers are refactored to their async equivalents, avoid calling them on a latency-sensitive event loop. Run them in worker threads via asyncio.to_thread or dedicate a background task/executor so they do not block other coroutines.

Testing & development

cd python
uv pip install -e .[all]
pytest

Key tests live in tests/test_client.py and rely on in-memory HTTPX doubles, so the suite runs offline.

When handling failures, catch KaizenAPIError for non-2xx responses (inspect status_code, payload, and headers) and KaizenRequestError for transport issues (timeouts, DNS, TLS errors).

References

• ../README.md – repository-wide overview and roadmap.
• ../docs/TODO.md – prioritized backlog and upcoming documentation plans.
• ../docs/ISSUE_DRAFTS.md – GitHub issue drafts ready for filing.
• ../openapi.json – machine-readable schema for generated clients.