Individual skill
eslint-to-biome-migration
Use when migrating a JavaScript or TypeScript project from ESLint, Prettier, Standard, or mixed legacy lint configuration to Biome 2.5.
.devin/skills/eslint-to-biome-migration/SKILL.md
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# ESLint to Biome migration
## Contract
| Field | Bound contract |
|---|---|
| Trigger | Migrate an existing JavaScript or TypeScript project from ESLint, Prettier, Standard, or mixed lint configuration to Biome 2.5. |
| Authority | Reversible local: writes only lint configuration, package scripts, dependencies, hooks, and CI checks; rollback is version control. No remote mutation. |
| Side effect | Writes `biome.json` or `biome.jsonc`; removes superseded lint and format configuration and dependencies; updates local scripts, hooks, and CI. No remote mutation. |
| Done | Biome 2.5 lint and format checks pass; the prior lint and format checks have an explicit coverage disposition; no ESLint, Prettier, Standard, or legacy config remains; CI runs Biome without auto-fix and passes. |
## Inputs
- Project root with `package.json` and an existing lint or format setup. Required.