Auto fix with Astro deletes source code when formatting

[grundmanise]

VS Code version

1.105.1

Extension version

3.3.0

Biome version

2.3.8

Operating system

• Windows
• macOS
• Linux

Description

I'd like to report an issue with Astro formatter. When assist/source/organizeImports is enabled and autofix is applied, all the code between --- gets deleted except for the (now) sorted imports.

Before fix:

---
import Card from "./card.astro";
import { className } from "solid-js/web";

console.log('FOO')
// more JS
---
// HTML

After fix:

---
import { className } from "solid-js/web";
import Card from "./card.astro";
---
// HTML

settings.json:

...
  "editor.formatOnSave": true,
  "editor.formatOnPaste": true,
  "emmet.showExpandedAbbreviation": "never",
  "editor.codeActionsOnSave": {
    "source.organizeImports.biome": "explicit",
    "source.addMissingImports": "explicit",
    "source.fixAll.biome": "explicit"
  }
...

biome.jsonc:

  "assist": {
    "actions": {
      "source": {
        "organizeImports": "on"
      }
    }
  },

Steps to reproduce

Apply a similar config in the Astro project. Use the VSCode plugin to fix import sorting.

Expected behavior

Imports will be sorted and code fixed.

Does this issue occur when using the CLI directly?

Not sure / Not applicable

Link to a minimal reproduction

No response

Logs

[dyc3]

do you have experimental html full support enabled in your biome.json?

[github-actions]

Hello @grundmanise, please provide a minimal reproduction. You can use one of the following options:

• Provide a link to our playground, if it's applicable.
• Provide a link to a GitHub repository. To easily create a reproduction, you can use our interactive CLI via npm create @biomejs/biome-reproduction

Issues marked with Needs reproduction will be closed if they have no activity within 3 days.

[kremalicious]

happens for me too (biome v2.3.10, extension v3.3.0) when extension tries to fix import sorting. Only with the extension, using CLI formatting works fine so creating reproduction in playground is a bit tricky.

With this in biome.json:

"html": {
  "experimentalFullSupportEnabled": true
}

And VS Code settings with:

"editor.codeActionsOnSave": {
  "source.fixAll.biome": "explicit"
}

To then reproduce, in VS Code create a file Test.astro with some dummy component imports which are in wrong sort order:

---
import Component2 from './Component2.astro'
import Component1 from './Component1.astro'
---

<div class="test">
  <Component1/>
  <Component2/>
</div>

<style>
.test {
  padding: 20px;
}
</style>

<script>
document.querySelector('.test').addEventListener('click', () => {
  console.log('Test component clicked')
})
</script>

Upon hitting save, extension for me makes this out of it, removing everything in frontmatter, and between style, script tags:

---
---

<div class="test">
  <Component1/>
  <Component2/>
</div>

<style></style>

<script></script>

Where the extension output then says:

2025-12-20 13:23:49.253 [info]   Message: Can't format code because it contains syntax errors
  Code: -32603 
Can't format code because it contains syntax errors

[dyc3]

Please provide a reproduction in one of the formats suggested by the bot: #894 (comment)

It's necessary for us to be able to narrow down the root cause.

[kremalicious]

yup, sorry about that, now back at the big screen. There you go: https://github.com/kremalicious/biome-vscode-repro-894

[github-actions]

This issue has been automatically closed because it has been inactive for more than 3 days and it does not have a minimal reproduction.

[kremalicious]

This issue has in fact a minimal reproduction linked in my comment above, so please reopen

[kremalicious]

@dyc3 can we please reopen this issue?