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

# Updater in SUP

> Interpret input and propose state changes without owning presentation.

<Note>
  **Design note.** `LLMMutator` is one updater adapter; SUP does not require an LLM.
</Note>

An updater consumes input plus current state and produces an updated state. It should not need to choose final presentation copy or render components.

Potential updater implementations include deterministic parsers, form submissions, tool results, or LLM extraction. In LangState, `BaseMutator` is the nearest contract and `LLMMutator` appends candidates plus the latest inference to a copied `InterpretiveState`.

Keep provider calls, retries, and authentication visible in the adapter boundary. Evaluate updater output against expected state before evaluating the tone or layout of the presentation.