# XState 6.0.0-alpha.36

- Product: XState (https://whatsnew.fyi/product/xstate)
- Vendor: Stately
- Date: 2026-08-12
- Version: 6.0.0-alpha.36
- Original notes: https://github.com/statelyai/xstate/releases/tag/xstate%406.0.0-alpha.36
- Permalink: https://whatsnew.fyi/product/xstate/releases/6.0.0-alpha.36
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

- **added** — Add `machineVersions().adaptEvents()` for adapting complete event histories between machine versions with support for retained-version adapters and async adapters

###### Minor Changes

- af31f22: Add `machineVersions().adaptEvents()` for adapting complete event histories
  between machine versions. Exact retained-version adapters infer source and
  target event types, while an async `'*'` adapter can handle unknown histories.
  
  ```ts
  const events = await versions.adaptEvents(storedEvents, {
    from: { id: 'checkout', version: '1' },
    to: '2',
    adapters: {
      '1': (events) => events.map(toV2Event)
    }
  });
  ```