# Next.js v16.3.1-canary.22

- Product: Next.js (https://whatsnew.fyi/product/next-js)
- Vendor: Vercel
- Date: 2026-08-17
- Version: v16.3.1-canary.22
- Original notes: https://github.com/vercel/next.js/releases/tag/v16.3.1-canary.22
- Permalink: https://whatsnew.fyi/product/next-js/releases/v16.3.1-canary.22
- 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'.

---

- **fixed** — Allow 32-bit usize conversion in turbo-persistence
- **fixed** — Restore missing NFT exports unit fixtures
- **fixed** — Fix backport canary release dispatch in CI
- **changed** — Enforce that tasks exist when accessing them in turbo-tasks-backend
- **added** — Add persistence delete and tombstone plumbing for GC in turbo-tasks-backend
- **added** — Add key-value tombstones for MultiValue families in turbo-persistence

###### Misc Changes

- fix(turbo-persistence): allow 32-bit usize conversion: #97288
- test: restore missing NFT `exports*` unit fixtures: #97459
- [ci] Fix backport canary release dispatch: #97383
- turbo-tasks-backend: Enforce that tasks exist when accessing them: #96043
- turbo-tasks-backend: add persistence delete/tombstone plumbing for GC: #95975
- turbo-persistence: add key-value tombstones for MultiValue families: #96929

###### Credits 

Huge thanks to @hardfist, @mischnic, @ztanner, and @lukesandberg for helping!