ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter1/search-codegen/env.example

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+# OpenRouter API Configuration
+# Get your API key from: https://openrouter.ai/keys
+# Note: this experiment uses OpenRouter as its PRIMARY backend (no fallback
+# needed). The same OPENROUTER_API_KEY also serves as the universal fallback
+# for the other chapter1 experiments (context, learning-from-experience,
+# web-search-agent) when their direct provider key is missing.
+OPENROUTER_API_KEY=your-openrouter-api-key
+
+# API Base URL (default is fine for most users)
+OPENROUTER_BASE_URL=https://openrouter.ai/api/v1
+
+# OpenAI official path (canonical GPT-5.6 Sol); needs an account with quota
+OPENAI_API_KEY=your-openai-api-key
+
+# Alibaba Model Studio (DashScope) — eligible equivalent-provider path with
+# hosted web_search + hosted code_interpreter on the Responses API.
+# Get your API key from: https://www.alibabacloud.com/help/en/model-studio/get-api-key
+# Use https://dashscope.aliyuncs.com/compatible-mode/v1 for a China-region key.
+DASHSCOPE_API_KEY=your-dashscope-api-key
+DASHSCOPE_BASE_URL=https://dashscope-intl.aliyuncs.com/compatible-mode/v1
+DASHSCOPE_MODEL=qwen3.7-plus
+
+# Model Configuration
+# GPT-5 model identifier on OpenRouter
+MODEL_NAME=openai/gpt-5.6-sol
+
+# Request Configuration
+DEFAULT_TEMPERATURE=0.3
+DEFAULT_MAX_TOKENS=4000
+DEFAULT_TOOL_CHOICE=auto
+
+# Logging
+LOG_LEVEL=INFO
+
+# Rate Limiting
+RATE_LIMIT_RPM=20
+
+# Retry Configuration
+MAX_RETRIES=3
+RETRY_DELAY=1.0
+
+# Tool-specific Configuration
+WEB_SEARCH_MAX_RESULTS=5
+CODE_INTERPRETER_TIMEOUT=30