# `Runic.Workflow.FactRef`
[🔗](https://github.com/zblanco/runic/blob/main/lib/workflow/fact_ref.ex#L1)

A lightweight reference to a Fact without its value.

Used during lean replay / hybrid rehydration to reconstruct graph
topology without loading all fact values into memory.

# `t`

```elixir
@type t() :: %Runic.Workflow.FactRef{
  ancestry: {Runic.Workflow.Fact.hash(), Runic.Workflow.Fact.hash()} | nil,
  causal_ancestry: Runic.Workflow.FactAncestry.t() | nil,
  content_digest: Runic.Identity.t() | nil,
  hash: Runic.Workflow.Fact.hash(),
  id: Runic.Identity.t() | nil,
  payload_digest: Runic.Identity.t() | nil
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*