# `Capstan.SnapshotStore.InMemory`
[🔗](https://github.com/baselabs/capstan/blob/v1.3.1/lib/capstan/snapshot_store.ex#L86)

A process-lifetime `Capstan.SnapshotStore` reference implementation.

Backed by an `Agent` holding one pipeline's `%Capstan.Snapshot.State{}` (`nil` until first
written). Durable only for the life of the process — a restart loses the snapshot progress
— so it is intended for tests and ephemeral pipelines, **never** a production durable
store. Rule 1 (Ch5): it holds the state in memory and never logs it.

# `start_link`

```elixir
@spec start_link(keyword()) :: Agent.on_start()
```

Start a fresh store (the snapshot state begins `nil`).

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