[Naturalclar]

Supersedes #1243, which bumps the dependency alone and therefore fails lint with:

× Biome exited because the configuration resulted in errors. Please fix them.
  $ biome migrate

biome 2 cannot read a v1 config, so the upgrade needs the migration and two code changes alongside the version bump.

Config migration

Produced by biome migrate, not hand-written:

v1	v2
$schema 1.9.4	2.6.7
files.ignore: ["lib"]	files.includes: ["**", "!**/lib"]
organizeImports: { enabled: true }	assist.actions.source.organizeImports: "on"
linter.rules.recommended: true	linter.rules.preset: "recommended"

Two real findings from biome 2

noReactNativeDeepImports (new rule) — flags the three deep react-native imports. These are deliberate: UIMenuNativeComponent.ts is the codegen spec, and React Native's codegen expects CodegenTypes and codegenNativeComponent on those exact paths.

I checked whether the rule's advice was actionable: react-native/index.js does re-export both codegenNativeComponent and codegenNativeCommands as top-level getters, so the imports could technically be rewritten. I chose not to — rewriting imports that codegen parses risks breaking native builds for no functional gain, and CLAUDE.md explicitly warns against restructuring that file. Suppressed with the reasoning recorded inline so the rule stays active for genuinely accidental deep imports elsewhere.

One mechanical detail: the spec file needs a file-level biome-ignore-all rather than a line suppression, because biome anchors the multi-line type import's diagnostic on the closing from "..." line, where a statement-level comment can't sit.

noUnusedVariables — flags the unused catch binding in react-native.config.js. Fixed with an optional catch binding (} catch {), since the error was never used.

Verification

CI covers less of this than it looks like it does, so I ran the gaps locally:

Check	Result	In CI?
yarn lint	clean, 27 files	yes
yarn typescript	clean	yes
yarn test	1 suite passed, 1 todo	no — there is no test job
yarn prepare (bob build)	all 3 targets written	no — yarn install doesn't run prepare

Deliberately out of scope: yarn format drift

yarn biome format . reports drift in CLAUDE.md, CONTRIBUTING.md, README.md, package.json, plugin/withAndroidDrawables.js and the spec file. I left all of it alone:

• The markdown is new scope. biome 2 formats Markdown; 1.9 did not. Reformatting three docs would bury the upgrade.
• The spec file's drift is pre-existing and unrelated. I verified this rather than assuming: running @biomejs/biome@1.9.4 against master's config and file flags the identical two lines — a missing trailing comma after WithDefault, and 'large' instead of "large" from feat(ios): preferredElementSize #1202.

yarn format is not part of CI (the Build workflow runs lint, tsc, android, ios), so none of this gates anything. Worth a follow-up PR if you want the repo format-clean under biome 2.

Note on #1243

Once this merges, #1243 is redundant and dependabot should close it, since the dependency will already be at 2.6.7.

🤖 Generated with Claude Code