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66 lines
2.4 KiB
Markdown
66 lines
2.4 KiB
Markdown
---
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title: LangGraph
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description: Integrate LangGraph with OpenSandbox using a graph-driven control flow for agent orchestration.
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---
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# LangGraph Agent + OpenSandbox Example
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Integrate LangGraph with OpenSandbox using a graph-driven control flow. The example uses
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explicit state machine nodes to create, prepare, run, inspect, and clean up a sandbox, plus
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a decision node to retry with a fallback command if the run step fails.
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## Start OpenSandbox server [local]
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Pre-pull the code-interpreter image (includes Python):
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```shell
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docker pull sandbox-registry.cn-zhangjiakou.cr.aliyuncs.com/opensandbox/code-interpreter:v1.1.0
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# use docker hub
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# docker pull opensandbox/code-interpreter:v1.1.0
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```
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Start the local OpenSandbox server, logs will be visible in the terminal:
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```shell
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uv pip install opensandbox-server
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opensandbox-server init-config ~/.sandbox.toml --example docker
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opensandbox-server
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```
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## Run the example
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```shell
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# Install OpenSandbox + LangGraph deps
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uv pip install opensandbox langgraph langchain-anthropic
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# Run the example (requires SANDBOX_DOMAIN / SANDBOX_API_KEY / ANTHROPIC_API_KEY)
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uv run python examples/langgraph/main.py
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```
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The workflow writes files, executes a job, retries with a fallback command on failure (default
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`python` vs `python3`), then summarizes results with Claude and cleans up the sandbox instance.
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## Environment Variables
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| Variable | Default | Description |
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|----------|---------|-------------|
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| `SANDBOX_DOMAIN` | `localhost:8080` | Sandbox service address |
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| `SANDBOX_API_KEY` | _(optional for local)_ | API key if your server requires authentication |
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| `SANDBOX_IMAGE` | `sandbox-registry.cn-zhangjiakou.cr.aliyuncs.com/opensandbox/code-interpreter:v1.1.0` | Sandbox image to use |
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| `ANTHROPIC_API_KEY` | _(required if `ANTHROPIC_AUTH_TOKEN` is unset)_ | Your Anthropic API key |
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| `ANTHROPIC_AUTH_TOKEN` | _(alternate)_ | Alternate Anthropic auth token (uses `Authorization` header) |
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| `ANTHROPIC_BASE_URL` | _(optional)_ | Anthropic API endpoint override |
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| `ANTHROPIC_MODEL` | `claude-3-5-sonnet-latest` | Model to use |
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::: warning
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`ANTHROPIC_API_KEY` and `ANTHROPIC_AUTH_TOKEN` should not be set together.
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:::
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## References
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- [LangGraph](https://langchain-ai.github.io/langgraph/) - Agent workflow framework
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- [Source code on GitHub](https://github.com/opensandbox-group/OpenSandbox/tree/main/examples/langgraph)
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