1  """Shared OpenRouter API client for Hermes tools.
 2  
 3  Provides a single lazy-initialized AsyncOpenAI client that all tool modules
 4  can share.  Routes through the centralized provider router in
 5  agent/auxiliary_client.py so auth, headers, and API format are handled
 6  consistently.
 7  """
 8  
 9  import os
10  
11  _client = None
12  
13  
14  def get_async_client():
15      """Return a shared async OpenAI-compatible client for OpenRouter.
16  
17      The client is created lazily on first call and reused thereafter.
18      Uses the centralized provider router for auth and client construction.
19      Raises ValueError if OPENROUTER_API_KEY is not set.
20      """
21      global _client
22      if _client is None:
23          from agent.auxiliary_client import resolve_provider_client
24          client, _model = resolve_provider_client("openrouter", async_mode=True)
25          if client is None:
26              raise ValueError("OPENROUTER_API_KEY environment variable not set")
27          _client = client
28      return _client
29  
30  
31  def check_api_key() -> bool:
32      """Check whether the OpenRouter API key is present."""
33      return bool(os.getenv("OPENROUTER_API_KEY"))