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fix: resolve critical bugs, modernize codebase, fix all lint errors
Core engine fixes: - Fix WeakRef event listeners silently GC'd (replaced with strong refs) - Fix scheduler race condition (snapshot batch before execution) - Fix branded types structurally distinct (ItemId ≠ GroupId) - Fix double-refilter in ITEMS_LOADED (single setState + refilter) - Add O(1) filteredIdSet via Set for item visibility checks - Add registry item cache with invalidation on mutation - Fix search remove() from O(n) rebuild to O(k) direct deletes - Fix frecency Temporal.Duration to pre-computed hour constants React adapter fixes: - Fix dual React instance (pnpm.overrides forces single canary) - Add machine disposal on unmount with Strict Mode safety - Fix controlled dialog render loop via ref tracking - Add useSyncExternalStore to useCommandState for proper subscriptions - Fix useOptimistic active item with O(1) filteredIdSet.has() - Fix async-items infinite re-suspension via stable promise ref - Add proper mergeRefs utility in primitives - Change role="application" to role="search" (WAI-ARIA) - Broaden React peer deps to >=19.0.0 Build & tooling: - Fix workspace build ordering (--workspace-concurrency=4) - Disable twoslash (incompatible with TypeScript 6 / @typescript/vfs) - Optimize lefthook pre-push with glob filter - Fix all Biome lint errors across 60+ files (noNonNullAssertion, useExplicitType, useExhaustiveDependencies, noUnusedImports) Documentation: - Add comprehensive READMEs for all 6 packages - Add LICENSE files for all packages Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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‎apps/docs/.vitepress/config.ts‎

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import { transformerTwoslash } from '@shikijs/twoslash';
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// import { transformerTwoslash } from '@shikijs/twoslash';
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// Disabled: twoslash/@typescript/vfs not yet compatible with TypeScript 6
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import { defineConfig } from 'vitepress';
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export default defineConfig({
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['meta', { name: 'twitter:image', content: 'https://command.crimson.dev/og-image.png' }],
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],
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markdown: {
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codeTransformers: [
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transformerTwoslash({
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twoslashOptions: {
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compilerOptions: {
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target: 99, // ESNext
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module: 199, // ES2025
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lib: ['ES2026', 'DOM'],
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},
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},
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}),
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],
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},
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// Twoslash disabled until @typescript/vfs supports TypeScript 6
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// markdown: {
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// codeTransformers: [
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// transformerTwoslash({ ... }),
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// ],
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// },
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// View Transitions API for page navigation — VitePress 2.0 feature
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// appearance: {

‎apps/playground/src/demos/VirtualizedDemo.tsx‎

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const items = useMemo(
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() =>
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Array.from({ length: 10_000 }, (_, i) => {
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const word = WORDS[i % WORDS.length]!;
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const category = CATEGORIES[i % CATEGORIES.length]!;
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const icon = ICONS[i % ICONS.length]!;
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const word = WORDS[i % WORDS.length] as string;
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const category = CATEGORIES[i % CATEGORIES.length] as string;
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const icon = ICONS[i % ICONS.length] as string;
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return {
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id: `virt-item-${i}`,
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value: `Item ${i} ${word} ${category}`,

‎benchmarks/frecency.bench.ts‎

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}
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bench('single getBonus lookup', () => {
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engine.getBonus(ids[5000]!);
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engine.getBonus(ids[5000] as ItemId);
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});
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bench('100 sequential getBonus lookups', () => {
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for (let i = 0; i < 100; i++) {
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engine.getBonus(ids[i * 100]!);
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engine.getBonus(ids[i * 100] as ItemId);
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}
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});
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‎benchmarks/standalone/compare-baseline.ts‎

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function median(sorted: readonly number[]): number {
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const mid = Math.floor(sorted.length / 2);
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return sorted.length % 2 === 0 ? (sorted[mid - 1]! + sorted[mid]!) / 2 : sorted[mid]!;
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return sorted.length % 2 === 0
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? ((sorted[mid - 1] as number) + (sorted[mid] as number)) / 2
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: (sorted[mid] as number);
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}
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function _padRight(str: string, len: number): string {

‎biome.json‎

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},
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"overrides": [
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{
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"includes": ["benchmarks/**", "apps/playground/**"],
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"includes": [
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"benchmarks/**",
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"apps/playground/**",
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"tests/unit/cmdk-performance-accuracy.test.tsx"
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],
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"linter": {
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"rules": {
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"nursery": {

‎lefthook.yml‎

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- rebase
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pre-push:
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parallel: true
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commands:
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test:
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run: vitest run --reporter=dot
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size:
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run: pnpm build && size-limit
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# Only check size if packages changed — skip full rebuild on docs-only pushes
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glob: "packages/*/src/**/*.{ts,tsx}"
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run: pnpm --filter './packages/*' run build && size-limit

‎package.json‎

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"pnpm": ">=11.0.0-alpha.13"
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},
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"scripts": {
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"build": "pnpm -r --parallel run build",
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"build": "pnpm -r --workspace-concurrency=4 run build",
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"test": "vitest run",
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"test:watch": "vitest watch",
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"test:coverage": "vitest run --coverage",
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"typescript": "6.0.1-rc",
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"vitest": "4.1.0-beta.6"
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},
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"pnpm": {
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"overrides": {
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"react": "19.3.0-canary-46103596-20260305",
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"react-dom": "19.3.0-canary-46103596-20260305"
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}
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},
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"size-limit": [
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{
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"name": "@crimson_dev/command (core)",

‎packages/command-codemod/LICENSE‎

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MIT License
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Copyright (c) 2026 Crimson Dev
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎packages/command-codemod/README.md‎

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<h1 align="center">@crimson_dev/command-codemod</h1>
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<p align="center">
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<strong>Automated migration from <code>cmdk</code> to <code>@crimson_dev/command-react</code></strong>
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</p>
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<p align="center">
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<a href="https://www.npmjs.com/package/@crimson_dev/command-codemod"><img src="https://img.shields.io/npm/v/@crimson_dev/command-codemod?style=flat-square&color=crimson" alt="npm" /></a>
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<a href="https://github.com/ABCrimson/modern-cmdk/blob/main/LICENSE"><img src="https://img.shields.io/npm/l/@crimson_dev/command-codemod?style=flat-square" alt="license" /></a>
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</p>
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---
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## What is this?
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A set of jscodeshift transforms that automatically migrate your codebase from `cmdk` (pacocoursey/cmdk) to `@crimson_dev/command-react`. Handles import rewrites, API changes, and data attribute renames.
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## Usage
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Run all transforms at once:
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```bash
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npx @crimson_dev/command-codemod ./src
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```
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Or run individual transforms:
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```bash
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npx @crimson_dev/command-codemod --transform import-rewrite ./src
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npx @crimson_dev/command-codemod --transform forward-ref ./src
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npx @crimson_dev/command-codemod --transform data-attrs ./src
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npx @crimson_dev/command-codemod --transform should-filter ./src
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```
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### Options
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| Flag | Description |
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|------|-------------|
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| `--transform <name>` | Run a specific transform (default: all) |
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| `--dry-run` | Preview changes without writing files |
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| `--concurrency <n>` | Number of files to process in parallel (default: CPU count) |
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## Transforms
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### `import-rewrite`
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Rewrites `cmdk` imports to `@crimson_dev/command-react`:
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```diff
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- import { Command } from 'cmdk';
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+ import { Command } from '@crimson_dev/command-react';
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```
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### `forward-ref`
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Removes `forwardRef` wrappers — React 19 passes `ref` as a regular prop:
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```diff
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- const MyCommand = forwardRef<HTMLDivElement, Props>((props, ref) => (
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- <Command ref={ref} {...props} />
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- ));
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+ function MyCommand({ ref, ...props }: Props & { ref?: Ref<HTMLDivElement> }) {
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+ return <Command ref={ref} {...props} />;
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+ }
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```
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### `data-attrs`
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Updates data attribute selectors to the new naming convention:
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```diff
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- [cmdk-root] { ... }
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+ [data-command-root] { ... }
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- [cmdk-item][aria-selected="true"] { ... }
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+ [data-command-item][data-active] { ... }
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```
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### `should-filter`
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Migrates the `shouldFilter` prop to the new `filter` prop:
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```diff
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- <Command shouldFilter={false}>
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+ <Command filter={false}>
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```
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## Dry Run
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Always preview first:
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```bash
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npx @crimson_dev/command-codemod --dry-run ./src
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```
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Output shows each file with planned changes, without modifying anything.
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## Requirements
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- Node.js >= 25.8.0
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- Files must be valid TypeScript/JavaScript (`.ts`, `.tsx`, `.js`, `.jsx`)
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## Links
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- [Migration Guide](https://github.com/ABCrimson/modern-cmdk)
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- [React Adapter](https://www.npmjs.com/package/@crimson_dev/command-react)
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## License
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MIT

‎packages/command-codemod/package.json‎

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"description": "Codemods for migrating from cmdk to @crimson_dev/command-react",
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"license": "MIT",
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"bin": {
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"command-codemod": "./dist/cli.js"
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"command-codemod": "./dist/cli.mjs"
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},
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"exports": {
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"./transforms/*": "./dist/transforms/*.js"

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