aischemagate

AISchemaGate — thin alias package over contractgate for LLM structured-output validation. Same Rust engine, same cg_live_... API keys, same tenant service, same backend as DataContractGate.

pip install aischemagate

Why this package exists

The underlying engine, SDK, and API are DataContractGate — one validator, one gateway. aischemagate is the LLM / AI-agent-shaped front door: it re-exports contractgate under a name that reads correctly from the LLM-output-validation angle. Use whichever import name matches your mental model; the behavior is identical.

See:

• aischemagate.com — product site
• aischemagate.dev — developer documentation
• RFC-094 (docs/rfcs/094-sdk-llm-output-guard.md) — SDK design

10-line quickstart

import os
from aischemagate import LLMGate
from openai import OpenAI

gate = LLMGate(
    api_key=os.environ["CONTRACTGATE_API_KEY"],
    contract_id="extract_invoice_v1",
    llm=OpenAI(),
)
result = gate.completion(
    model="gpt-4o-mini",
    messages=[{"role": "user", "content": "Extract invoice JSON from: ..."}],
    response_format={"type": "json_object"},
    auto_repair=True,
)
if result.ok:
    forward_downstream(result.payload)   # egress-sanitized; safe to forward

For Anthropic, call gate.message(model="claude-sonnet-4-5", messages=[...]). For vLLM / Ollama OpenAI-compat, call gate.completion(...) unchanged.

What's new

See CHANGELOG.md and the parent contractgate CHANGELOG — the alias version tracks initial release only; feature work is versioned on contractgate.