POST /gateway/v1/chat/completions

import openai

client = openai.OpenAI(
    base_url="http://localhost:8100/gateway/v1",
    api_key="hk_...",                                  # votre clé Haki
    default_headers={"X-Haki-Subject-Id": "usr_42"},   # QUI on mémorise
)
client.chat.completions.create(model="gpt-4o-mini", messages=[
    {"role": "user", "content": "Dans quelle langue dois-je envoyer la facture ?"}
])  # rien d'autre ne change

curl -X POST http://localhost:8100/gateway/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer hk_..." \
  -H "X-Haki-Subject-Id: usr_42" \
  -d '{"model": "gpt-4o-mini", "messages": [{"role": "user", "content": "..."}]}'

from haki.gateway import gateway_client

client = gateway_client("http://localhost:8100/gateway/v1", "hk_...", "usr_42")
response = client.post("/chat/completions", json={
    "model": "gpt-4o-mini",
    "messages": [{"role": "user", "content": "..."}],
})