⚠️ Breaking Change
Impact Score: 7/10
Astro [email protected] — Release Notes & Engineering Impact
Source available — automated, not human-reviewed
Component: astro · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
Breaking-change evidence from the source
- [#15334](https://github.com/withastro/astro/pull/15334) [`d715f1f`](https://github.com/withastro/astro/commit/d715f1f88777a4ce0fb61c8043cccfbac2486ab4) Thanks [@florian-lefebvre](https://github.com/florian-lefebvre)! - **BREAKING CHANGE to the experimental Fonts API only**
⚡ Executive Summary (TL;DR)
Astro [email protected]. Source highlight: **BREAKING CHANGE to the experimental Fonts API only**
Who Does This Impact? (Role-Based Analysis)
💻 Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
📊 Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
⚙️ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
⚠️ Breaking Changes & Deprecations (1)
- - [#15334](https://github.com/withastro/astro/pull/15334) [`d715f1f`](https://github.com/withastro/astro/commit/d715f1f88777a4ce0fb61c8043cccfbac2486ab4) Thanks [@florian-lefebvre](https://github.com/florian-lefebvre)! - **BREAKING CHANGE to the experimental Fonts API only**
🔧 Bug Fixes & Patches (3)
- **BREAKING CHANGE to the experimental Fonts API only**
- On prerendered routes, read the file using `node:fs`
- On server rendered routes, fetch files using URLs from `fontData` and `context.url`
📄 View Raw Release Notes (Original Developer Log)
### Patch Changes
- [#15334](https://github.com/withastro/astro/pull/15334) [`d715f1f`](https://github.com/withastro/astro/commit/d715f1f88777a4ce0fb61c8043cccfbac2486ab4) Thanks [@florian-lefebvre](https://github.com/florian-lefebvre)! - **BREAKING CHANGE to the experimental Fonts API only**
Removes the `getFontBuffer()` helper function exported from `astro:assets` when using the experimental Fonts API
This experimental feature introduced in v15.6.13 ended up causing significant memory usage during build. This feature has been removed and will be reintroduced after further exploration and testing.
If you were relying on this function, you can replicate the previous behavior manually:
- On prerendered routes, read the file using `node:fs`
- On server rendered routes, fetch files using URLs from `fontData` and `context.url`