Astro 7.3.4

Astro has released version 7.3.4, a patch release dated September 22, 2026. It delivers a set of bug fixes and polish for the static web framework, with a focus on build reliability, type-checking ergonomics, and Markdown correctness.

What Changed

The standout fix stops incremental builds from repeatedly rendering unchanged pages. When modules or compiled CSS referenced bundled assets, pages that should have been cached were being rebuilt on every pass. That regression is resolved, so incremental builds no longer churn output that has not changed.

TypeScript 7 Handling

astro check now produces a clearer error for TypeScript 7. Instead of a cryptic failure, the command explains that TypeScript 7 is not yet supported and points developers toward the experimental route: type-checking Astro files with TypeScript 7.1 alongside the new @astrojs/ts-content-mapper package.

Fixes and Polish

• Markdown images — Ampersands in image alt and title attributes are now escaped exactly once. The round-trip no longer double-escapes the numeric or named character references emitted by Markdown processors.
• Error naming — Three error names now match their documented references: MissingLocale, MissingIndexForInternationalization, and NoManifestAvailable no longer show a suffixed Error in the dev overlay.
• Content router — A rare issue where Vercel ISR pages could intermittently be served a cached redirect to a nonsense URL such as /$0/ is fixed, with valid pages rendering correctly and unresolvable requests returning a 404.

Upgrade Path

This is a routine patch release with no breaking changes. Existing 7.x projects can update their dependency with the package manager of choice. If you rely on incremental builds with bundled assets or serve ISR pages through Vercel, this release is strongly recommended.