Use direct OpenAI defaults for matchmaking

app/engine/llm.py

@@ -1,7 +1,7 @@
 """LLM clients — ONE place to build them.
 
 Two backends, by capability:
-- **Gateway** (OpenAI-compatible, e.g. opencode/OpenRouter) → chat for the curator.
+- **Gateway** → chat for the curator, using DSPY_* when configured or direct OpenAI otherwise.
 - **Embeddings** → direct OpenAI or an OpenAI-compatible embeddings API via OPENAI_API_BASE.
 
 Both keys come from config/.env (git-ignored). Each builder returns `None` when unconfigured so the
@@ -16,12 +16,16 @@ from app.config import get_settings
 
 @lru_cache
 def gateway_client():
-    """OpenAI-compatible client for the opencode.ai/zen gateway — chat (Opus). None if unconfigured."""
+    """Chat client for curation/suggestions. Prefer DSPY_* override, otherwise use OPENAI_API_KEY."""
     s = get_settings()
-    if not (s.DSPY_API_BASE and s.DSPY_API_KEY):
+    api_key = s.DSPY_API_KEY or s.OPENAI_API_KEY
+    if not api_key:
         return None
     from openai import OpenAI
-    return OpenAI(base_url=s.DSPY_API_BASE, api_key=s.DSPY_API_KEY, timeout=60, max_retries=2)
+    kwargs = {"api_key": api_key, "timeout": 60, "max_retries": 2}
+    if s.DSPY_API_BASE:
+        kwargs["base_url"] = s.DSPY_API_BASE
+    return OpenAI(**kwargs)
 
 
 @lru_cache
@@ -38,6 +42,6 @@ def embed_client():
 
 
 def curate_enabled() -> bool:
-    """Is the Opus curator usable? (flag on + gateway key present)."""
+    """Is the curator usable? (flag on + any chat key present)."""
     s = get_settings()
-    return bool(s.ENGINE_LLM_ENABLED and s.DSPY_API_BASE and s.DSPY_API_KEY)
+    return bool(s.ENGINE_LLM_ENABLED and (s.DSPY_API_KEY or s.OPENAI_API_KEY))