# `SquidMesh.Runtime.Journal.Checkpoint`
[🔗](https://github.com/ccarvalho-eng/squid_mesh/blob/main/lib/squid_mesh/runtime/journal/checkpoint.ex#L1)

A compact projection snapshot with the durable thread revision it covers.

Checkpoints are rebuild accelerators. The journal remains the source of truth,
and `thread_rev` records the last applied Jido thread revision so a projection
can resume from a precise point instead of silently depending on current code.

# `t`

```elixir
@type t() :: %SquidMesh.Runtime.Journal.Checkpoint{
  projection: term(),
  thread: SquidMesh.Runtime.DispatchProtocol.Entry.thread(),
  thread_id: String.t(),
  thread_rev: non_neg_integer(),
  updated_at: DateTime.t()
}
```

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