chore: migrate from Prettier to Oxfmt

[AntonVishal]

why

Oxfmt is a faster Prettier alternative from the Oxc toolchain.

what changed

Configs and scripts updated to use Oxfmt instead of Prettier. Root format check was 0.8s warm, now 0.5s so ~40% faster.

test plan

pnpm format:check
pnpm lint

• Part 1: ESLint → Oxlint - chore: migrate from ESLint to Oxlint #2302
• Part 2: Prettier → Oxfmt - you're here

---

Summary by cubic

Replaced Prettier with oxfmt and adopted oxlint across the repo to unify formatting/linting and speed up checks (~0.8s → ~0.5s warm, ~40% faster). Updated scripts, configs, and VSCode settings accordingly.

• Dependencies

  • Added oxfmt, oxlint, and oxlint-plugin-eslint; removed prettier, eslint, and @eslint/js.
  • Added .oxfmtrc.json and .oxlintrc.json (root and packages/cli); removed .prettierrc, .prettierignore, and eslint.config.mjs files.
  • VSCode: set default formatter to oxc.oxc-vscode and added it to recommendations.

• Migration

  • Install dependencies: pnpm i. Format with pnpm format; check with pnpm format:check; lint with pnpm oxlint or pnpm lint.
  • In VSCode, install/select oxc.oxc-vscode as the default formatter.
  • CI/Turbo now track .oxfmtrc.json/.oxlintrc.json; formatting checks use oxfmt --check and linting uses oxlint.

^{Written for commit 2ce0986. Summary will update on new commits.}

[changeset-bot]

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Latest commit: 2ce0986

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[github-actions]

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Approving the latest commit mirrors it into an internal PR owned by the approver.
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[cubic-dev-ai]

No issues found across 36 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

Architecture diagram

sequenceDiagram
    participant Dev as Developer
    participant LintStaged as lint-staged (pre-commit)
    participant CI as CI Pipeline
    participant Oxfmt as oxfmt
    participant Oxlint as oxlint
    participant Turbo as Turbo

    Note over Dev,CI: NEW: Development workflow uses oxfmt + oxlint

    Dev->>Dev: Run pnpm format
    Dev->>Oxfmt: oxfmt (format all files)
    Oxfmt-->>Dev: Formatted output

    Dev->>Dev: Run pnpm lint
    Dev->>Oxfmt: pnpm format:check → oxfmt --check
    alt Format check passes
        Oxfmt-->>Dev: All files ok
        Dev->>Oxlint: pnpm oxlint → oxlint .
        Oxlint-->>Dev: Lint result
        Dev->>Turbo: pnpm check (typecheck)
        Turbo-->>Dev: Types ok
    else Format check fails
        Oxfmt-->>Dev: Formatting errors
    end

    Dev->>LintStaged: Git commit (pre-commit hook)
    LintStaged->>Oxfmt: oxfmt --no-error-on-unmatched-pattern
    Oxfmt-->>LintStaged: Formatted staged files
    LintStaged-->>Dev: Commit proceeds

    CI->>Turbo: Run turbo tasks (format:check, lint)
    Note over CI,Oxfmt: CI tracks new config files: .oxfmtrc.json, .oxlintrc.json
    Turbo->>Oxfmt: oxfmt --check across packages
    Turbo->>Oxlint: oxlint . across packages
    Oxfmt-->>Turbo: Format check result
    Oxlint-->>Turbo: Lint result
    Turbo-->>CI: Build/lint status

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_{Re-trigger cubic}