AI カスタマーサポート — Claude + Kunavo による本番品質のチケット自動化

import json
from openai import OpenAI
client = OpenAI(api_key="sk-kn-...", base_url="https://api.kunavo.com/v1")

# Claude enforces a json_schema response_format; json_object it does not.
TICKET = {
    "type": "object",
    "properties": {
        "category": {"type": "string",
                     "enum": ["billing", "shipping", "account", "technical", "other"]},
        "priority": {"type": "string", "enum": ["low", "normal", "urgent"]},
        "sentiment": {"type": "string", "enum": ["negative", "neutral", "positive"]},
    },
    "required": ["category", "priority", "sentiment"],
    "additionalProperties": False,
}

# 1) Classify the ticket (cheap model)
def classify(text: str) -> dict:
    resp = client.chat.completions.create(
        model="claude-haiku-4-5",
        messages=[
            {"role": "system", "content": "Classify this support ticket."},
            {"role": "user", "content": text},
        ],
        response_format={"type": "json_schema",
                         "json_schema": {"name": "ticket", "schema": TICKET}},
        max_tokens=200,
    )
    return json.loads(resp.choices[0].message.content)

# 2) Draft a response (better model)
def draft(ticket: str, kb_context: list[str], guidelines: str) -> str:
    resp = client.chat.completions.create(
        model="claude-sonnet-5",
        messages=[
            {"role": "system", "content": [{
                "type": "text",
                "text": guidelines,  # tone, policy, escalation rules
                "cache_control": {"type": "ephemeral"},
            }]},
            {"role": "user", "content": (
                f"# Knowledge base\n{chr(10).join(kb_context)}\n\n"
                f"# Customer message\n{ticket}\n\n"
                "Draft a reply. Be specific, cite the KB doc id."
            )},
        ],
        max_tokens=500,
    )
    return resp.choices[0].message.content