# Next.js v16.4.0-canary.13

- Product: Next.js (https://whatsnew.fyi/product/next-js)
- Vendor: Vercel
- Date: 2026-08-31
- Version: v16.4.0-canary.13
- Original notes: https://github.com/vercel/next.js/releases/tag/v16.4.0-canary.13
- Permalink: https://whatsnew.fyi/product/next-js/releases/v16.4.0-canary.13
- 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'.

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- **fixed** — Stop requiring the removed viewTransition flag in agent-043
- **changed** — Shorten use cache messages and unify them into one factory
- **changed** — Upgrade React from 29d9d318-20260826 to ff7445e6-20260831
- **changed** — Use commander for CLI argument parsing
- **changed** — Pass in original searchParams for private-cache pages
- **fixed** — Fix Turbopack HMR recovery after dropped connections
- **changed** — Remove unused code from image optimizer
- **changed** — Improve test cache handler implementations
- **changed** — Fix the documented contract for custom cache handlers
- **changed** — Add layout stability guidance for videos and iframes
- **changed** — Improve use-cache-cross-deployment tests

###### Misc Changes

- evals: stop requiring the removed viewTransition flag in agent-043: #98116
- errors: shorten "use cache" messages and unify them into one factory: #94300
- test: add adoption skill evals: #97759
- Upgrade React from `29d9d318-20260826` to `ff7445e6-20260831`: #98113
- [ci] Simplify `upload-preview-tarballs` workflow: #98109
- devlow: use commander for cli argument parsing: #93860
- [PPF] Pass in original searchParams for private-cache pages: #98041
- docs: document create-next-app Cache Components prompt and flag: #97798
- lazy server hmr: #96566
- Fix Turbopack HMR recovery after dropped connections: #97966
- test: Improve test cache handler implementations: #98098
- docs: Fix the documented contract for custom cache handlers: #98039
- chore: remove unused code from image optimizer: #98060
- docs: add layout stability guidance for videos and iframes: #98070
- tests: Improve use-cache-cross-deployment tests: #98049

###### Credits 

Huge thanks to @gaojude, @aurorascharff, @eps1lon, @wbinnssmith, @lubieowoce, @icyJoseph, @mischnic, @unstubbable, and @styfle for helping!