初始化demo

agent_demo/config.py

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+import os
+
+try:
+    # Optional: load a local .env file if python-dotenv is installed
+    from dotenv import load_dotenv
+    load_dotenv()
+
+except ImportError:
+    pass
+
+
+
+# ===== Model backend selection =====
+MODEL_PROVIDER = os.getenv("MODEL_PROVIDER", "openai").strip().lower()
+MODEL_ID = os.getenv("MODEL_ID", "gpt-4o-mini").strip()
+
+MAX_TOKENS = int(os.getenv("MAX_TOKENS", 1024))
+TEMPERATURE = float(os.getenv("TEMPERATURE", 0.7))
+
+
+# ===== Provider credentials / endpoints =====
+
+OPENAI_API_KEY = os.getenv("OPENAI_API_KEY", "").strip()
+OPENAI_API_BASE_URL = os.getenv("OPENAI_API_BASE", "https://api.openai.com/v1").strip()
+
+ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY", "").strip()
+
+OLLAMA_HOST = os.getenv("OLLAMA_HOST", "http://localhost:11434").strip()
+
+AWS_REGION = os.getenv("AWS_REGION", "us-east-1").strip()
+
+
+# ===== Conversation / history =====
+CONV_MAX_BYTES = int(os.getenv("CONV_MAX_BYTES", 1024 * 1024))  # 1MB
+
+
+# ===== History backend: "json" (one file per session) or "sqlite" (single SQLite database) =====
+SESSION_BACKEND = os.getenv("SESSION_BACKEND", "json").strip().lower()
+SESSION_DIR = os.getenv("SESSION_DIR", "./sessions").strip()
+SQLITE_PATH = os.getenv("SQLITE_PATH", "./sessions/agent.db").strip()