# `PromptRunner.RuntimeStore.MemoryStore`
[🔗](https://github.com/nshkrdotcom/prompt_runner_sdk/blob/v0.6.1/lib/prompt_runner/runtime_store/memory_store.ex#L1)

In-memory runtime store used by API-first runs.

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