Correctly dedupe each GMT timezone option in the list

AGENTS.md

@@ -0,0 +1,58 @@
+## Project Context
+
+A TypeScript project using React. Contains 26 files across 6 directories.
+
+## Stack
+
+**Frameworks & Tools:**
+- Vite (build)
+- React (web)
+- Vitest (testing)
+- tsup (build)
+- esbuild (build)
+
+## Commands
+
+```bash
+pnpm dev  # dev
+pnpm build  # build
+pnpm build:example  # build:example
+pnpm test  # test
+pnpm test:watch  # test:watch
+pnpm test:ci  # test:ci
+```
+
+## Conventions
+
+- **Naming**: camelCase
+- **File organization**: flat
+- **Config files**: tsconfig.json
+- **CI/CD**: .github/workflows/tests.yml
+
+## Architecture
+
+**Entry points:** src/index.tsx
+
+**Key directories:**
+- `example/`
+- `src/` - Source code
+
+## Boundaries
+
+**Always:**
+- Use pnpm, not npm or yarn
+- Run `pnpm test` before committing changes
+- Follow camelCase naming convention
+- Follow flat file organization
+
+**Ask first:**
+- Adding new dependencies
+- Changing project configuration files
+- Modifying CI/CD pipelines
+
+**Never:**
+- Commit secrets, API keys, or .env files
+- Delete or overwrite test files without understanding them
+- Force push to main/master branch
+
+<!-- agentseed:meta {"sha":"4396e24e461489ba6797a646354a71f2bd77ece7","timestamp":"2026-02-18T14:12:41.668Z","format":"agentseed-v1"} -->

CLAUDE.md

@@ -0,0 +1 @@
+AGENTS.md

biome.json

@@ -0,0 +1,34 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true,
+    "defaultBranch": "main"
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true
+    }
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100
+  },
+  "javascript": {
+    "formatter": {
+      "semicolons": "asNeeded",
+      "quoteStyle": "double",
+      "trailingCommas": "all"
+    }
+  },
+  "files": {
+    "ignore": ["dist/**", "**/node_modules/**"]
+  }
+}

example/package.json

@@ -21,22 +21,21 @@
     "dev": "vite",
     "build": "vite build",
     "preview": "vite preview",
-    "format": "prettier --write \"src/**/*.{js,jsx,ts,tsx}\"",
-    "lint": "prettier --check \"src/**/*.{js,jsx,ts,tsx}\""
+    "format": "biome format --write src/",
+    "lint": "biome check src/"
   },
   "dependencies": {
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react": "^19.2.4",
+    "react-dom": "^19.2.4",
     "react-select": "^5.8.0",
-    "spacetime": "^7.5.0",
+    "spacetime": "^7.12.0",
     "spacetime-informal": "^0.6.1"
   },
   "devDependencies": {
-    "@types/react": "^18.2.48",
-    "@types/react-dom": "^18.2.18",
-    "@vitejs/plugin-react": "^4.2.1",
-    "prettier": "^3.2.4",
-    "typescript": "^5.3.3",
-    "vite": "^5.0.12"
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.4",
+    "typescript": "^5.9.3",
+    "vite": "^7.3.1"
   }
 }

example/tsconfig.json

@@ -3,8 +3,8 @@
   "compilerOptions": {
     "module": "esnext",
     "target": "esnext",
-    "moduleResolution": "node",
-    "jsx": "react",
+    "moduleResolution": "bundler",
+    "jsx": "react-jsx",
     "baseUrl": "./",
     "paths": {
       "*": ["../../src"]
@@ -15,7 +15,6 @@
     "lib": ["dom", "dom.iterable", "esnext"],
     "forceConsistentCasingInFileNames": true,
     "resolveJsonModule": true,
-    "allowSyntheticDefaultImports": true,
-    "importsNotUsedAsValues": "error"
+    "allowSyntheticDefaultImports": true
   }
 }

package.json

@@ -1,19 +1,23 @@
 {
   "name": "react-timezone-select",
-  "version": "3.2.8",
+  "version": "3.3.1",
   "description": "Usable, dynamic React Timezone Select",
   "scripts": {
-    "dev": "concurrently \"tsup src/index.tsx --format esm --watch\" \"cd example && pnpm dev\"",
+    "dev": "concurrently \"tsup --watch\" \"cd example && pnpm dev\"",
     "prepublishOnly": "pnpm run build",
     "postpublish": "pnpm run build:example && npm run deploy",
-    "build": "tsup src/index.tsx --format esm --clean --dts && sed -i '1i \"use client\"\\n' dist/index.js",
+    "build": "tsup",
     "build:example": "cd example && pnpm run build",
     "deploy": "gh-pages -d example/dist",
     "pretest": "pnpm run build",
     "test": "vitest",
     "test:watch": "vitest --watch",
     "test:ci": "pnpm run build && pnpm test",
-    "tsc": "tsc"
+    "tsc": "tsc",
+    "lint": "biome lint",
+    "lint:fix": "biome lint --fix",
+    "format": "biome check",
+    "format:fix": "biome check --write"
   },
   "author": "Nico Domino <yo@ndo.dev>",
   "homepage": "https://github.com/ndom91/react-timezone-select",
@@ -25,16 +29,8 @@
     "url": "https://github.com/ndom91/react-timezone-select/issues"
   },
   "license": "MIT",
-  "keywords": [
-    "react",
-    "timezone",
-    "select",
-    "react-select"
-  ],
-  "files": [
-    "dist/**/*",
-    "package.json"
-  ],
+  "keywords": ["react", "timezone", "select", "react-select"],
+  "files": ["dist/**/*", "package.json"],
   "type": "module",
   "module": "./dist/index.js",
   "types": "./dist/index.d.ts",
@@ -45,71 +41,33 @@
     }
   },
   "peerDependencies": {
-    "react": "^16 || ^17.0.1 || ^18 || ^19.0.0-0",
-    "react-dom": "^16 || ^17.0.1 || ^18 || ^19.0.0-0",
+    "react": "^16 || ^17.0.1 || ^18 || ^19",
+    "react-dom": "^16 || ^17.0.1 || ^18 || ^19",
     "react-select": "^5.8.0"
   },
   "dependencies": {
-    "spacetime": "^7.6.0",
+    "spacetime": "^7.12.0",
     "timezone-soft": "^1.5.2"
   },
   "devDependencies": {
-    "@babel/core": "^7.24.9",
-    "@testing-library/jest-dom": "^6.4.8",
-    "@testing-library/react": "^16.0.0",
-    "@types/jest": "^29.5.12",
-    "@types/react": "^18.3.3",
-    "@types/react-dom": "^18.3.0",
-    "@types/testing-library__jest-dom": "^5.14.9",
-    "@typescript-eslint/eslint-plugin": "^7.17.0",
-    "@typescript-eslint/parser": "^7.17.0",
-    "@vitejs/plugin-react": "^4.3.1",
-    "concurrently": "^8.2.2",
-    "esbuild": "^0.23.0",
-    "esbuild-jest": "^0.5.0",
-    "eslint": "^8.57.0",
-    "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-prettier": "5.2.1",
-    "gh-pages": "^6.1.1",
-    "jest-environment-jsdom": "^29.7.0",
-    "prettier": "^3.3.3",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
-    "simple-git-hooks": "^2.11.1",
-    "ts-jest": "^29.2.3",
-    "tsup": "^8.2.2",
-    "typescript": "^5.5.4",
-    "vite": "^5.3.4",
-    "vite-tsconfig-paths": "^4.3.2",
-    "vitest": "^2.0.4"
-  },
-  "eslintConfig": {
-    "parser": "@typescript-eslint/parser",
-    "parserOptions": {
-      "ecmaVersion": "latest",
-      "sourceType": "module"
-    },
-    "extends": [
-      "eslint:recommended",
-      "plugin:@typescript-eslint/recommended",
-      "plugin:prettier/recommended"
-    ],
-    "plugins": [
-      "@typescript-eslint"
-    ],
-    "root": true
-  },
-  "prettier": {
-    "semi": false,
-    "printWidth": 100
-  },
-  "simple-git-hooks": {
-    "pre-commit": "npx lint-staged"
-  },
-  "lint-staged": {
-    "*.{js,jsx,ts,tsx}": [
-      "eslint --fix"
-    ]
+    "@biomejs/biome": "^1.9.4",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@types/node": "^20.19.0",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.4",
+    "concurrently": "^9.2.1",
+    "esbuild": "^0.27.3",
+    "gh-pages": "^6.3.0",
+    "jsdom": "^26.1.0",
+    "react": "^19.2.4",
+    "react-dom": "^19.2.4",
+    "tsup": "^8.5.1",
+    "typescript": "^5.9.3",
+    "vite": "^7.3.1",
+    "vite-tsconfig-paths": "^6.1.1",
+    "vitest": "^4.0.18"
   },
   "packageManager": "pnpm@9.0.6+sha256.0624e30eff866cdeb363b15061bdb7fd9425b17bc1bb42c22f5f4efdea21f6b3"
 }