A collection of agent skills for Claude Code, Codex, Gemini, Cursor, and more.

Reviews and writes Swift App Intents code for Siri, Shortcuts, Spotlight, widgets, Control Center, and Apple Intelligence.

• Covers AppIntent, AppEntity, IndexedEntity, TransientAppEntity, FileEntity, and all query types (EntityQuery, EntityStringQuery, EnumerableEntityQuery, EntityPropertyQuery, IntentValueQuery)
• Handles the full snippet-intent lifecycle: ShowsSnippetView, ShowsSnippetIntent, SnippetIntent, Button(intent:), multi-step interactive confirmation
• Apple Intelligence integration via @AppIntent(schema:), @AppEntity(schema:), @AppEnum(schema:) across .photos.*, .journal.*, .mail.*, .browser.*, .visualIntelligence.*
• Widget and Control Center wiring: WidgetConfigurationIntent, ControlConfigurationIntent, App Group shared storage, WidgetCenter.reloadAllTimelines()
• Catches ~35 common mistakes LLMs make, from @Model as AppEntity to missing @Property, stale shortcut parameters, and mutation inside SnippetIntent.perform()
• Supports iOS 16+ / macOS 13+ with iOS 19+ additions (supportedModes, continueInForeground, requestChoice, snippet reload())

Reviews and writes modern Swift FormatStyle code with .formatted() APIs.

• Covers Date, Number, Measurement, and custom FormatStyle types
• Generates correct .formatted() calls with proper modifiers
• Reviews existing FormatStyle code for best practices
• Replaces legacy DateFormatter/NumberFormatter patterns
• Supports iOS 15+ / macOS 12+ APIs

Audits a repository through git history before reading source files.

• Analyzes commit frequency, active contributors, and project timeline
• Identifies hot files and recently changed areas
• Detects large files, binary assets, and repo structure
• Provides a prioritized list of files to inspect first
• Works on any Git repository without reading source code

Categorized FFmpeg recipes for video automation pipelines, adapted from the Rendi FFmpeg cheatsheet.

• Format conversion, resize with aspect-ratio padding, frame-accurate trimming
• Audio processing: replace, extract, mix, crossfade, normalize, downsample for speech-to-text (16 kHz mono)
• Advanced editing: playback speed without pitch shift, jump cuts, social-media cropping, drawtext, subtitle burn-in, watermarking, vstack, intro/main/outro assembly
• Asset generation: image-to-video, slideshows with xfade, Ken Burns zoompan, looping GIFs, scene-change thumbnails, tiled storyboards
• Encoding tuning: CRF/preset guidance for libx264, libx265 with hvc1 for Apple AirDrop, libvpx-vp9 for the web, +faststart, hardware acceleration (*_nvenc, *_qsv, VAAPI)
• Bakes in common FFmpeg footguns: -c copy rules, input vs output seeking, setpts=PTS-STARTPTS after trim, setsar=1:1 after pad, -pix_fmt yuv420p for QuickTime

npx skills add n0an/skills

To install a single skill:

npx skills add n0an/skills --skill app-intents
npx skills add n0an/skills --skill swift-format-style
npx skills add n0an/skills --skill git-codebase-preflight
npx skills add n0an/skills --skill ffmpeg

/plugin marketplace add n0an/skills

Anton Novoselov, https://github.com/n0an

The project is available under the MIT license. See the LICENSE file for more info.