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fix(gemini): fail fast on missing API key + surface it in hermes dump (#15133)

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Two small fixes triggered by a support report where the user saw a
cryptic 'HTTP 400 - Error 400 (Bad Request)!!1' (Google's GFE HTML
error page, not a real API error) on every gemini-2.5-pro request.

The underlying cause was an empty GOOGLE_API_KEY / GEMINI_API_KEY, but
nothing in our output made that diagnosable:

1. hermes_cli/dump.py: the api_keys section enumerated 23 providers but
   omitted Google entirely, so users had no way to verify from 'hermes
   dump' whether the key was set. Added GOOGLE_API_KEY and GEMINI_API_KEY
   rows.

2. agent/gemini_native_adapter.py: GeminiNativeClient.__init__ accepted
   an empty/whitespace api_key and stamped it into the x-goog-api-key
   header, which made Google's frontend return a generic HTML 400 long
   before the request reached the Generative Language backend. Now we
   raise RuntimeError at construction with an actionable message
   pointing at GOOGLE_API_KEY/GEMINI_API_KEY and aistudio.google.com.

Added a regression test that covers '', '   ', and None.
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Teknium 2026-04-24 05:35:17 -07:00 • committed by GitHub
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13
tests/agent/test_gemini_native_adapter.py
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@ -234,6 +234,19 @@ def test_native_client_accepts_injected_http_client():
assert client._http is injected
def test_native_client_rejects_empty_api_key_with_actionable_message():
"""Empty/whitespace api_key must raise at construction, not produce a cryptic
Google GFE 'Error 400 (Bad Request)!!1' HTML page on the first request."""
from agent.gemini_native_adapter import GeminiNativeClient
for bad in ("", " ", None):
with pytest.raises(RuntimeError) as excinfo:
GeminiNativeClient(api_key=bad) # type: ignore[arg-type]
msg = str(excinfo.value)
assert "GOOGLE_API_KEY" in msg and "GEMINI_API_KEY" in msg
assert "aistudio.google.com" in msg
@pytest.mark.asyncio
async def test_async_native_client_streams_without_requiring_async_iterator_from_sync_client():
from agent.gemini_native_adapter import AsyncGeminiNativeClient