Initial monorepo setup

.eslintrc.cjs

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+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+  root: true,
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: "module",
+  },
+  plugins: ["solid"],
+  extends: ["plugin:solid/typescript"],
+  rules: {
+    // Only Solid-specific rules — everything else handled by Biome
+    "solid/reactivity": "error",
+    "solid/no-destructure": "error",
+    "solid/prefer-for": "warn",
+    "solid/no-react-deps": "error",
+    "solid/no-react-specific-props": "error",
+  },
+};

.gitignore

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+node_modules/
+dist/
+.tsdown/
+coverage/
+*.tsbuildinfo
+.superpowers/

biome.json

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+{
+  "$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
+  "organizeImports": { "enabled": true },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "suspicious": {
+        "noExplicitAny": "error"
+      },
+      "style": {
+        "useConst": "error",
+        "useTemplate": "error"
+      }
+    }
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "double",
+      "semicolons": "always",
+      "trailingCommas": "all"
+    }
+  },
+  "files": {
+    "ignore": ["node_modules", "dist", ".tsdown", "coverage"]
+  }
+}

package.json

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+{
+  "name": "pettyui-monorepo",
+  "private": true,
+  "scripts": {
+    "build": "pnpm -r build",
+    "test": "pnpm -r test",
+    "lint": "biome check . && eslint packages --ext .ts,.tsx",
+    "format": "biome format --write .",
+    "typecheck": "pnpm -r typecheck"
+  },
+  "devDependencies": {
+    "@biomejs/biome": "^1.9.0",
+    "eslint": "^9.0.0",
+    "eslint-plugin-solid": "^0.14.0",
+    "typescript": "^6.0.2",
+    "zod": "^4.3.6"
+  }
+}

packages/core/package.json

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+{
+  "name": "pettyui",
+  "version": "0.1.0",
+  "description": "AI-native headless UI component library for SolidJS",
+  "type": "module",
+  "exports": {
+    ".": {
+      "solid": "./src/index.ts",
+      "import": "./dist/index.js",
+      "require": "./dist/index.cjs"
+    },
+    "./dialog": {
+      "solid": "./src/components/dialog/index.ts",
+      "import": "./dist/dialog/index.js",
+      "require": "./dist/dialog/index.cjs"
+    },
+    "./presence": {
+      "solid": "./src/utilities/presence/index.ts",
+      "import": "./dist/utilities/presence/index.js",
+      "require": "./dist/utilities/presence/index.cjs"
+    },
+    "./focus-trap": {
+      "solid": "./src/utilities/focus-trap/index.ts",
+      "import": "./dist/utilities/focus-trap/index.js",
+      "require": "./dist/utilities/focus-trap/index.cjs"
+    },
+    "./scroll-lock": {
+      "solid": "./src/utilities/scroll-lock/index.ts",
+      "import": "./dist/utilities/scroll-lock/index.js",
+      "require": "./dist/utilities/scroll-lock/index.cjs"
+    },
+    "./dismiss": {
+      "solid": "./src/utilities/dismiss/index.ts",
+      "import": "./dist/utilities/dismiss/index.js",
+      "require": "./dist/utilities/dismiss/index.cjs"
+    },
+    "./portal": {
+      "solid": "./src/utilities/portal/index.ts",
+      "import": "./dist/utilities/portal/index.js",
+      "require": "./dist/utilities/portal/index.cjs"
+    },
+    "./visually-hidden": {
+      "solid": "./src/utilities/visually-hidden/index.ts",
+      "import": "./dist/utilities/visually-hidden/index.js",
+      "require": "./dist/utilities/visually-hidden/index.cjs"
+    }
+  },
+  "scripts": {
+    "build": "tsdown",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "typecheck": "tsc --noEmit"
+  },
+  "peerDependencies": {
+    "solid-js": "^1.9.0"
+  },
+  "dependencies": {
+    "@floating-ui/dom": "^1.7.6"
+  },
+  "devDependencies": {
+    "@solidjs/testing-library": "^0.8.10",
+    "@testing-library/jest-dom": "^6.0.0",
+    "@testing-library/user-event": "^14.0.0",
+    "jsdom": "^26.0.0",
+    "solid-js": "^1.9.12",
+    "tsdown": "^0.21.7",
+    "vite": "^8.0.3",
+    "vite-plugin-solid": "^2.11.11",
+    "vitest": "^4.1.2"
+  }
+}

packages/core/tests/setup.ts

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+import "@testing-library/jest-dom";

packages/core/tsconfig.json

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+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "dist",
+    "baseUrl": ".",
+    "paths": {}
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "dist", "tests"]
+}

packages/core/tsdown.config.ts

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+import { defineConfig } from "tsdown";
+
+export default defineConfig({
+  entry: {
+    index: "src/index.ts",
+    "dialog/index": "src/components/dialog/index.ts",
+    "presence/index": "src/utilities/presence/index.ts",
+    "focus-trap/index": "src/utilities/focus-trap/index.ts",
+    "scroll-lock/index": "src/utilities/scroll-lock/index.ts",
+    "dismiss/index": "src/utilities/dismiss/index.ts",
+    "portal/index": "src/utilities/portal/index.ts",
+    "visually-hidden/index": "src/utilities/visually-hidden/index.ts",
+  },
+  format: ["esm", "cjs"],
+  dts: true,
+  clean: true,
+  sourcemap: true,
+  external: ["solid-js", "solid-js/web", "solid-js/store"],
+});

packages/core/vite.config.ts

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+import { defineConfig } from "vite";
+import solid from "vite-plugin-solid";
+
+export default defineConfig({
+  plugins: [solid()],
+  test: {
+    environment: "jsdom",
+    globals: true,
+    setupFiles: ["./tests/setup.ts"],
+    transformMode: { web: [/\.[jt]sx?$/] },
+  },
+});

pnpm-workspace.yaml

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+packages:
+  - "packages/*"

tsconfig.base.json

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+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "jsx": "preserve",
+    "jsxImportSource": "solid-js",
+    "strict": true,
+    "exactOptionalPropertyTypes": true,
+    "noUncheckedIndexedAccess": true,
+    "verbatimModuleSyntax": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "esModuleInterop": false,
+    "skipLibCheck": true
+  }
+}