> ## Documentation Index
> Fetch the complete documentation index at: https://docs.superwire.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Dependencies

> How Superwire builds and executes the workflow graph.

Superwire builds a dependency graph from references. A node can run once every value it references is available.

## Data dependencies

```wire theme={"languages":{"custom":["/languages/wire.tmLanguage.json"]}}
agent extract_facts {
    model: model.fast
    instruction: "Extract facts from {{ input.notes }}."
    output {
        facts: [string]
    }
}

agent write_summary {
    model: model.fast
    instruction: "Write a summary from {{ agent.extract_facts.facts }}."
    output {
        summary: string
    }
}
```

`write_summary` depends on `extract_facts` because it references `agent.extract_facts.facts`.

## Independent work

Agents with no dependency relationship may run concurrently.

```wire theme={"languages":{"custom":["/languages/wire.tmLanguage.json"]}}
agent list_risks {
    model: model.fast
    instruction: "List risks for {{ input.topic }}."
    output {
        risks: [string]
    }
}

agent list_actions {
    model: model.fast
    instruction: "List action items for {{ input.topic }}."
    output {
        actions: [string]
    }
}
```

These agents can run at the same time because neither references the other.

## Schema dependencies

Schemas do not run. They define shapes used by input, tool contracts, agent outputs, and final output.