chore: replace eslint with oxlint

[escapedcat]

Replace ESLint and 10 related dependencies with oxlint for significantly faster linting (70ms vs seconds). All existing lint rules are mapped to their oxlint equivalents in .oxlintrc.json.

[qodo-code-review]

Review Summary by Qodo

Replace ESLint with oxlint for faster linting

✨ Enhancement

Walkthroughs

Description

• Replace ESLint with oxlint for significantly faster linting
• Migrate all lint rules to .oxlintrc.json configuration
• Remove 10 ESLint-related dependencies from devDependencies
• Update lint scripts and lint-staged configuration

Diagram

flowchart LR
  ESLint["ESLint + 10 dependencies"]
  Oxlint["Oxlint single dependency"]
  Config["eslint.config.mjs"]
  NewConfig[".oxlintrc.json"]
  Scripts["package.json scripts"]
  
  ESLint -- "replaced by" --> Oxlint
  Config -- "replaced by" --> NewConfig
  Scripts -- "updated to use" --> Oxlint

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File Changes

1. .oxlintrc.json ⚙️ Configuration changes +47/-0

New oxlint configuration file

• New oxlint configuration file with schema reference
• Defines ignore patterns for lib, coverage, node_modules, fixtures, dist
• Configures plugins for typescript, import, and vitest
• Maps all ESLint rules to oxlint equivalents with appropriate severity levels
• Includes overrides for test files to disable import/first rule

.oxlintrc.json

---

2. eslint.config.mjs ⚙️ Configuration changes +0/-104

Remove ESLint configuration file

• Entire file removed as part of ESLint replacement
• Contained 104 lines of ESLint configuration with multiple plugins and presets
• Configuration logic replaced by simpler .oxlintrc.json format

eslint.config.mjs

---

3. package.json Dependencies +8/-13

Replace ESLint with oxlint in dependencies

• Update lint scripts to use oxlint instead of eslint
• Add oxlint to lint-staged configuration for TypeScript and JavaScript files
• Remove 10 ESLint-related devDependencies (@eslint/eslintrc, @eslint/js,
 @typescript-eslint/eslint-plugin, @typescript-eslint/parser, @vitest/eslint-plugin,
 eslint-plugin-import-x, eslint-config-prettier, eslint-import-resolver-typescript, globals)
• Add oxlint ^1.58.0 as single replacement dependency
• Add packageManager specification for yarn

package.json

---

[qodo-code-review]

Code Review by Qodo

🐞 Bugs (1) 📘 Rule violations (0) 📎 Requirement gaps (0)

1. Unresolvable $schema path 🐞 Bug ⚙ Maintainability

Description

.oxlintrc.json references a JSON schema under ./node_modules/oxlint/..., but node_modules is
gitignored, so IDEs/tools attempting to resolve $schema in a fresh clone will fail schema
validation until dependencies are installed.

Code

.oxlintrc.json[R1-3]

+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "ignorePatterns": [

Evidence

The config hard-codes a schema path into node_modules, and the repo explicitly ignores
node_modules, so the schema file cannot exist in-repo and won’t resolve prior to yarn install.

.oxlintrc.json[1-3]
.gitignore[1-6]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

## Issue description
`.oxlintrc.json` uses `"$schema": "./node_modules/oxlint/configuration_schema.json"`, but `node_modules` is not committed (gitignored). This breaks JSON-schema-based validation/autocomplete in tools that try to resolve `$schema` before dependencies are installed.
### Issue Context
This does **not** break `oxlint` execution itself, but it can cause editor warnings/errors and loss of schema validation on fresh checkouts.
### Fix Focus Areas
- .oxlintrc.json[1-3]
- .gitignore[1-6]
### Suggested fix
Either:
1) Remove the `$schema` field, or
2) Point `$schema` to a schema file that exists in-repo (e.g., vendored under a `schemas/` directory), or
3) If your project is okay with remote schemas, point `$schema` to a stable URL that editors can fetch.

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[Copilot]

Pull request overview

This PR migrates the repo’s linting workflow from ESLint to oxlint to reduce lint runtime, replacing the ESLint configuration and dependencies with an .oxlintrc.json-based setup.

Changes:

• Replace lint / lint-fix scripts to use oxlint, and run oxlint --fix via lint-staged for *.{ts,js}.
• Remove the existing eslint.config.mjs flat-config and introduce .oxlintrc.json.
• Update dependencies/lockfile to add oxlint (and its platform bindings) and remove ESLint-related devDependencies.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.

File	Description
package.json	Switches lint scripts and lint-staged to oxlint; removes ESLint-related devDependencies; adds packageManager pin.
eslint.config.mjs	Deletes the ESLint flat config previously defining TypeScript/import/vitest lint behavior.
.oxlintrc.json	Adds the new oxlint configuration, including ignore patterns, plugins, and rule overrides.
yarn.lock	Adds oxlint and platform-specific optional bindings to the lockfile.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

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