openrouter-audit-logging

# OpenRouter Audit Logging ## Overview Every OpenRouter API call returns a generation ID and metadata that enables comprehensive audit logging. The generation endpoint (`GET /api/v1/generation?id=`) provides exact cost, token counts, provider used, and latency -- data that the initial response doesn't always include. This skill covers structured logging, cost tracking, PII redaction, and compliance-ready audit trails. ## Core: Generation Metadata Retrieval ```python import os, json, time, hashlib, logging from datetime import datetime, timezone from dataclasses import dataclass, asdict from typing import Optional import requests from openai import OpenAI log = logging.getLogger("openrouter.audit") @dataclass class AuditEntry: timestamp: str generation_id: str model_requested: str model_used: str # Actual model served (may differ with fallbacks) prompt_tokens: int completion_tokens: int total_cost: float latency_ms: float status: str # "success" | "error" | "timeout" user_id: str prompt_hash: str # SHA-256 of prompt (not raw content) error_code: Optional[str] = None client = OpenAI( base_url="https://openrouter.ai/api/v1", api_key=os.environ["OPENROUTER_API_KEY"], default_headers={ "HTTP-Referer": "https://my-app.com", "X-Title": "my-app", }, ) def audited_completion( messages: list[dict], model: str = "anthropic/claude-3.5-sonnet", user_id: str = "...