Biome formatter removes unused imports during partial agent edits

[BYK]

Description

The biome formatter runs biome check --write after every file edit. The check --write command applies lint auto-fixes (including noUnusedImports removal) in addition to formatting. When the agent adds an import in one edit and the usage in a subsequent edit, biome removes the "unused" import between the two edits.

Steps to reproduce

1. Open a project with a biome.json that has noUnusedImports enabled (default)
2. Have the agent add an import statement in one edit
3. Observe the formatter running biome check --write between edits
4. The import is removed before the agent can add the usage in the next edit

OpenCode version

Latest dev

OS

Linux