vaxelia-ai-anthropic

A drop-in, compliance-instrumented wrapper around the official Anthropic Python SDK. Every non-streaming messages.create call is logged to your tenant's decision-log endpoint via vaxelia-ai-core — with its resilient, encrypted-on-disk buffer — so an AI decision is never silently lost. Every other method of the Anthropic SDK passes straight through to the real client untouched.

anthropic is a regular dependency of this package, so the wrapper is a true single-install drop-in: you do not install the Anthropic SDK separately.

Install

pip install vaxelia-ai-anthropic

Requires Python >= 3.9.

The one-line swap

Change your import — keep everything else:

- from anthropic import Anthropic
+ from vaxelia_ai_anthropic import Anthropic

Usage

import os
from vaxelia_ai_anthropic import Anthropic

client = Anthropic(
    api_key=os.environ["ANTHROPIC_API_KEY"],
    # Optional compliance block. Every field falls back to an env var (below),
    # so you can also pass nothing here and configure entirely from the env.
    compliance={
        "ai_system_id": os.environ.get("VAXELIA_AI_SYSTEM_ID"),
        "tenant_api_url": os.environ.get("VAXELIA_TENANT_API_URL"),
        "api_key": os.environ.get("VAXELIA_API_KEY"),
        "buffer_key": os.environ.get("VAXELIA_BUFFER_KEY"),
    },
)

# Identical to the official SDK. The decision is logged for you.
message = client.messages.create(
    model="claude-3-5-sonnet-latest",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Summarize the attached contract."}],
)

With env vars set, the compliance block can be omitted entirely:

client = Anthropic(api_key=os.environ["ANTHROPIC_API_KEY"])

The compliance argument accepts either a vaxelia_ai_core.ReporterConfig or a plain dict with the same field names.

Reaching the raw client

For methods this wrapper does not instrument, the underlying Anthropic client is available at client.raw, and every other attribute/method (models, beta, with_options, …) delegates to the real client automatically. On the messages resource, every method other than create (stream, count_tokens, batches, …) delegates directly to the real resource.

Configuration & environment variables

The compliance block is a ReporterConfig from vaxelia-ai-core. Every field is optional and falls back to a matching environment variable (12-factor):

For the encrypted disk buffer, the fail-closed buffer-key rule, retention, and backoff behaviour, see the vaxelia-ai-core README. Note: when buffering is enabled (the default) and no valid 32-byte buffer key is resolvable, construction raises (MissingBufferKeyError / InvalidBufferKeyError) — this wrapper surfaces that error rather than swallow it. To run without a disk buffer, set compliance.buffering_enabled = False.

What gets logged

On each instrumented messages.create call, one decision envelope is reported:

Reporter-error ordering (no silent drops)

The provider response is always obtained first; only then is the decision logged. If vaxelia-ai-core cannot deliver the decision and cannot durably buffer it, it raises (DecisionNotRecordedError) — and this wrapper lets that error surface to your caller. This is deliberate: the whole point of the compliance layer is that a recorded decision is never silently dropped. If you prefer delivery failures to be buffered instead of raised, keep buffering enabled (the default) with a valid buffer key — transient failures (network, 5xx, 429) are then retried with backoff and buffered to encrypted disk for later flush.

On a failed provider call, the failed decision is reported first (capturing only the error message, never the raw exception, which may carry request bodies or credentials), and then the original provider exception is re-raised unchanged.

Scope & limitations

• Streaming is not instrumented in v1. A call with stream=True passes straight through to the real client uninstrumented, so streaming usage never breaks — but no decision is logged for it yet. Streaming compliance capture is a planned enhancement.
• Only messages.create is instrumented. All other SDK methods delegate to the real client; reach client.raw for the underlying object when needed.

Development

# From sdks/python, with the shared venv:
.venv/bin/pip install -e vaxelia-ai-core
.venv/bin/pip install -e vaxelia-ai-anthropic
.venv/bin/python -m pytest vaxelia-ai-anthropic