# Hello World 套件

## 完整代码

最小的可工作套件，接收一个文本参数并输出。

### workflow.yaml

```yaml
name: hello-world
description: 输出用户输入的文本
version: 1.0.0
category: utility

params:
  type: object
  required:
    - message
  properties:
    message:
      type: string
      description: 要输出的文本

steps:
  - id: say-hello
    name: 输出信息
    script: run
    params:
      message: $params.message
```

### scripts/run.py

```python
#!/usr/bin/env python3
import json, os

params_file = os.environ.get("PARAMS_FILE", "/tmp/params.json")
with open(params_file) as f:
    params = json.load(f)

message = params.get("message", "Hello!")

result = {
    "output": message,
    "length": len(message)
}
print(json.dumps(result))
```

## 测试

```bash
# 打包
tar czf hello-world.tgz workflow.yaml scripts/

# 通过 API 发布后执行
agc run /tmp/output --suite-id <suite-id> --input message="Hello, AgentGIS!"
```

完整代码参考：`SuiteHub/hello-world-suite`