feat: Shadcn Registry Package

packages/docs/src/registry/items/parse-as-tuple.md

@@ -0,0 +1,12 @@
+The `parseAsTuple` parser allows you to parse fixed-length tuples with **any type** for each position.
+
+```ts
+import { parseAsTuple } from '@/lib/parsers/parse-as-tuple'
+import { parseAsInteger } from 'nuqs'
+
+// Coordinates tuple (x, y)
+parseAsTuple([parseAsInteger, parseAsInteger])
+
+// Optionally, customise the separator
+parseAsTuple([parseAsInteger, parseAsInteger], ';')
+```

packages/nuqs/package.json

@@ -48,7 +48,8 @@
     "adapters/react-router/v7.d.ts",
     "adapters/tanstack-router.d.ts",
     "adapters/custom.d.ts",
-    "adapters/testing.d.ts"
+    "adapters/testing.d.ts",
+    "lib/index.d.ts"
   ],
   "type": "module",
   "sideEffects": false,
@@ -125,6 +126,11 @@
       "types": "./dist/adapters/testing.d.ts",
       "import": "./dist/adapters/testing.js",
       "default": "./dist/adapters/testing.js"
+    },
+    "./lib": {
+      "types": "./dist/lib.d.ts",
+      "import": "./dist/lib.js",
+      "default": "./dist/lib.js"
     }
   },
   "scripts": {

packages/nuqs/src/api.test.ts

@@ -73,6 +73,9 @@ const exports = `
     "NuqsTestingAdapter": "function",
     "withNuqsTestingAdapter": "function",
   },
+  "./lib": {
+    "safeParse": "function",
+  },
   "./server": {
     "createLoader": "function",
     "createMultiParser": "function",

packages/nuqs/src/lib/index.ts

@@ -0,0 +1 @@
+export * from './safe-parse'

packages/nuqs/tsdown.config.ts

@@ -32,7 +32,8 @@ const entrypoints = {
     'adapters/react-router/v7': 'src/adapters/react-router/v7.ts',
     'adapters/tanstack-router': 'src/adapters/tanstack-router.ts',
     'adapters/custom': 'src/adapters/custom.ts',
-    'adapters/testing': 'src/adapters/testing.ts'
+    'adapters/testing': 'src/adapters/testing.ts',
+    lib: 'src/lib/index.ts'
   },
   server: {
     server: 'src/index.server.ts',

packages/registry/.gitignore

@@ -0,0 +1 @@
+public/r/

packages/registry/README.md

@@ -0,0 +1,30 @@
+# registry
+
+A shadcn/ui compatible registry for community parsers and utilities for the [nuqs](https://nuqs.dev) library.
+
+## Development
+
+```bash
+# Install dependencies
+pnpm install
+
+# Build the registry
+cd ../docs && pnpm build:registry
+# Run the docs server
+cd ../docs && pnpm dev
+
+```
+
+Usage example in any npm package:
+
+```bash
+pnpm dlx shadcn@latest add http://localhost:3000/r/parse-as-tuple.json
+```
+
+## Learn More
+
+To learn more about nuqs and shadcn/ui registries, take a look at the following resources:
+
+- [nuqs Documentation](https://nuqs.dev) - learn about nuqs features and API
+- [shadcn/ui Registry Documentation](https://ui.shadcn.com/docs/registry) - learn about shadcn/ui registries
+- [nuqs GitHub Repository](https://github.com/47ng/nuqs) - source code and issues

packages/registry/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "registry",
+  "description": "Shadcn CLI registry for community parsers & utilities",
+  "scripts": {
+    "test": "pnpm run --stream '/^test:/'",
+    "test:unit": "vitest run --typecheck"
+  },
+  "dependencies": {
+    "next": "15.5.0",
+    "nuqs": "workspace:*",
+    "shadcn": "^3.4.2"
+  },
+  "devDependencies": {
+    "typescript": "^5.9.2",
+    "vitest": "^3.2.4"
+  }
+}

packages/registry/parsers/parse-as-tuple.test.ts

@@ -0,0 +1,41 @@
+import { parseAsBoolean, parseAsInteger, parseAsString } from 'nuqs'
+import {
+  isParserBijective,
+  testParseThenSerialize,
+  testSerializeThenParse
+} from 'nuqs/testing'
+import { describe, expect, it } from 'vitest'
+import { parseAsTuple } from './parse-as-tuple'
+
+describe('parseAsTuple', () => {
+  it('parses and serializes tuples correctly', () => {
+    const parser = parseAsTuple([parseAsInteger, parseAsString, parseAsBoolean])
+    expect(parser.parse('1,a,false,will-ignore')).toStrictEqual([1, 'a', false])
+    expect(parser.parse('not-a-number,a,true')).toBeNull()
+    expect(parser.parse('1,a')).toBeNull()
+    // @ts-expect-error - Tuple length is less than 2
+    expect(() => parseAsTuple([parseAsInteger])).toThrow()
+    expect(parser.serialize([1, 'a', true])).toBe('1,a,true')
+    // @ts-expect-error - Tuple length mismatch
+    expect(() => parser.serialize([1, 'a'])).toThrow()
+    expect(testParseThenSerialize(parser, '1,a,true')).toBe(true)
+    expect(testSerializeThenParse(parser, [1, 'a', true] as const)).toBe(true)
+    expect(isParserBijective(parser, '1,a,true', [1, 'a', true] as const)).toBe(
+      true
+    )
+    expect(() =>
+      isParserBijective(parser, 'not-a-tuple', [1, 'a', true] as const)
+    ).toThrow()
+  })
+
+  it('equality comparison works correctly', () => {
+    const eq = parseAsTuple([parseAsInteger, parseAsBoolean]).eq!
+    expect(eq([1, true], [1, true])).toBe(true)
+    expect(eq([1, true], [1, false])).toBe(false)
+    expect(eq([1, true], [2, true])).toBe(false)
+    // @ts-expect-error - Tuple length mismatch
+    expect(eq([1, true], [1])).toBe(false)
+    // @ts-expect-error - Tuple length mismatch
+    expect(eq([1], [1])).toBe(false)
+  })
+})

packages/registry/parsers/parse-as-tuple.ts

@@ -0,0 +1,74 @@
+import { createParser, type SingleParserBuilder } from 'nuqs'
+import { safeParse } from 'nuqs/lib'
+
+type ParserTuple<T extends readonly unknown[]> = {
+  [K in keyof T]: SingleParserBuilder<T[K]>
+} & { length: 2 | 3 | 4 | 5 | 6 | 7 | 8 }
+
+/**
+ * Parse a comma-separated tuple with type-safe positions.
+ * Items are URI-encoded for safety, so they may not look nice in the URL.
+ * allowed tuple length is 2-8.
+ *
+ * @param itemParsers Tuple of parsers for each position in the tuple
+ * @param separator The character to use to separate items (default ',')
+ */
+export function parseAsTuple<T extends any[]>(
+  itemParsers: ParserTuple<T>,
+  separator = ','
+): SingleParserBuilder<T> {
+  const encodedSeparator = encodeURIComponent(separator)
+  if (itemParsers.length < 2 || itemParsers.length > 8) {
+    throw new Error(
+      `Tuple length must be between 2 and 8, got ${itemParsers.length}`
+    )
+  }
+  return createParser<T>({
+    parse: query => {
+      if (query === '') {
+        return null
+      }
+      const parts = query.split(separator)
+      if (parts.length < itemParsers.length) {
+        return null
+      }
+      // iterating by parsers instead of parts, any additional parts are ignored.
+      const result = itemParsers.map(
+        (parser, index) =>
+          safeParse(
+            parser.parse,
+            parts[index]!.replaceAll(encodedSeparator, separator),
+            `[${index}]`
+          ) as T[number] | null
+      )
+      return result.some(x => x === null) ? null : (result as T)
+    },
+    serialize: (values: T) => {
+      if (values.length !== itemParsers.length) {
+        throw new Error(
+          `Tuple length mismatch: expected ${itemParsers.length}, got ${values.length}`
+        )
+      }
+      return values
+        .map((value, index) => {
+          const parser = itemParsers[index]!
+          const str = parser.serialize ? parser.serialize(value) : String(value)
+          return str.replaceAll(separator, encodedSeparator)
+        })
+        .join(separator)
+    },
+    eq(a: T, b: T) {
+      if (a === b) {
+        return true
+      }
+      if (a.length !== b.length || a.length !== itemParsers.length) {
+        return false
+      }
+      return a.every((value, index) => {
+        const parser = itemParsers[index]!
+        const itemEq = parser.eq ?? ((x, y) => x === y)
+        return itemEq(value, b[index])
+      })
+    }
+  })
+}

packages/registry/tsconfig.json

@@ -0,0 +1,36 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "compilerOptions": {
+    "jsx": "react",
+    // Type checking
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "alwaysStrict": false, // Don't emit "use strict" to avoid conflicts with "use client"
+    // Modules
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "resolveJsonModule": true,
+    // Language & Environment
+    "target": "ESNext",
+    "lib": ["DOM", "DOM.Iterable", "ESNext"],
+    // Emit
+    "noEmit": true,
+    "declaration": true,
+    "declarationMap": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+
+    "downlevelIteration": true,
+    // Interop
+    "isolatedModules": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    // Misc
+    "skipLibCheck": true,
+    "skipDefaultLibCheck": true,
+    "incremental": true,
+    "tsBuildInfoFile": ".tsbuildinfo"
+  },
+  "include": ["**/*.ts", "**/*.tsx"],
+  "exclude": ["node_modules", "dist"]
+}

packages/registry/vitest.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig, type ViteUserConfig } from 'vitest/config'
+
+const config: ViteUserConfig = defineConfig({
+  test: {
+    typecheck: {
+      tsconfig: './tsconfig.json'
+    }
+  }
+})
+
+export default config