fix: pass apiKey in provider options (ai-sdk does not read OPENAI_API_KEY)

container/entrypoint.py

@@ -94,10 +94,6 @@ def write_opencode_config(secrets: dict, role: str) -> None:
 
     litellm_key = secrets.get("litellm-key", "")
 
-    # Set the LiteLLM API key as env var — opencode reads OPENAI_API_KEY for
-    # openai-compatible providers
-    os.environ["OPENAI_API_KEY"] = litellm_key
-
     config = {
         "$schema": "https://opencode.ai/config.json",
         "model": "litellm/copilot/claude-sonnet-4.6",
@@ -107,6 +103,7 @@ def write_opencode_config(secrets: dict, role: str) -> None:
                 "name": "LiteLLM",
                 "options": {
                     "baseURL": f"{LITELLM_BASE_URL}/v1",
+                    "apiKey": litellm_key,
                 },
                 "models": {
                     "copilot/claude-sonnet-4.6": {"name": "copilot/claude-sonnet-4.6"},