Reference — AVCaptureSession, AVCapturePhotoSettings, AVCapturePhotoOutput, RotationCoordinator, photoQualityPrioritization, deferred processing, AVCaptureMovieFileOutput, session presets, capture device APIs

Use for Core Location API reference - CLLocationUpdate, CLMonitor, CLServiceSession, authorization, background location, geofencing

Use when implementing widgets, Live Activities, Control Center controls, or app extensions - comprehensive API reference for WidgetKit, ActivityKit, App Groups, and extension lifecycle for iOS 14+

Reference — PHPickerViewController, PHPickerConfiguration, PhotosPicker, PhotosPickerItem, Transferable, PHPhotoLibrary, PHAsset, PHAssetCreationRequest, PHFetchResult, PHAuthorizationStatus, limited library APIs

Reference — Complete StoreKit 2 API guide covering Product, Transaction, AppTransaction, RenewalInfo, SubscriptionStatus, StoreKit Views, purchase options, server APIs, and all iOS 18.4 enhancements with WWDC 2025 code examples

Reference — Complete SwiftUI adaptive layout API guide covering ViewThatFits, AnyLayout, Layout protocol, onGeometryChange, GeometryReader, size classes, and iOS 26 window APIs

Reference — Comprehensive SwiftUI navigation guide covering NavigationStack (iOS 16+), NavigationSplitView (iOS 16+), NavigationPath, deep linking, state restoration, Tab+Navigation integration (iOS 18+), Liquid Glass navigation (iOS 26+), and coordinator patterns

Vision framework API, VNDetectHumanHandPoseRequest, VNDetectHumanBodyPoseRequest, person segmentation, face detection, VNImageRequestHandler, recognized points, joint landmarks, VNRecognizeTextRequest, VNDetectBarcodesRequest, DataScannerViewController, VNDocumentCameraViewController, RecognizeDocumentsRequest

Use the `b2c` CLI to search and read bundled Script API documentation and XSD schemas for Salesforce B2C Commerce.

Create API handoff documentation for frontend developers. Use when backend work is complete and needs to be documented for frontend integration, or user says 'create handoff', 'document API', 'frontend handoff', or 'API documentation'.

When answering questions about the Bankr API:

How to use bd (beads) for issue tracking, ready work, status updates, and comments in this repo.

Shared resource library for Beam AI integration skills. DO NOT load directly - provides common references (setup, API docs, error handling, authentication) and scripts used by beam-connect and individual Beam skills.

BEMRosetta hydrodynamic coefficient converter - AQWA to OrcaFlex workflow with QTF and mesh support

Functional annotation and taxonomy inference from sequence homology.

Structure prediction and structure-based annotation.

Business Operations - assign business cases, financial analysis, KPI tracking, and data analysis tasks

Automated blog comment posting for marketing and outreach

Use when managing blueprints directory structure and avoiding duplication. Always search_blueprints before creating to prevent duplicate documentation. Handles naming conventions and cross-references.

Use when creating or updating technical blueprint documentation for new features, API changes, or architectural modifications. Always use search_blueprints first to avoid duplication, then write_blueprint with proper structure.

bmad-planner

Execute ad-hoc database queries to explore the book's knowledge base using natural language questions that translate to semantic search, graph traversal, timeline queries, or hybrid queries

Transition from brainstorming to rough-draft skill

How to create & maintain TypeDoc site documentation and the README for Bupkis

name: business-context

Translate stakeholder questions and business objectives into structured requirements and success criteria. Use when framing pilot scope, defining problem statements, and establishing acceptance metrics based on interviews, briefs, or process documentation.

Use when documenting component implementation patterns, internal structure, or hand-off points - enforces NO CODE rule and diagram-first approach for leaf-level C3 documentation

Use when changes affect component organization, technology stack, or cross-container communication - triggered by new components, pattern changes, or needing to map external interfaces to internal components

Use when exploring Context level impact during scoping - system boundaries, actors, cross-container interactions, and high-level concerns

Use when designing, updating, or exploring system architecture with C3 methodology - iterative scoping through hypothesis, exploration, and discovery across Context/Container/Component layers

C4 model architecture visualization and documentation

When fetching library documentation, API references, or technical docs for project dependencies via WebFetch, automatically save a copy to the docs/ folder. Also triggers when user pastes documentation or discusses library APIs that should be cached for reference. Every non-stdlib import in the project should have corresponding reference docs cached.

Annotates cell clusters with biological cell type labels using multiple methods: direct assignment, ScType, scCATCH, hitype, or CellTypist. This process is essential for interpreting clustering results by assigning meaningful biological identities to each cluster.

Backlog and changelog management for CFN projects

changelog

changelog-guide

Transform technical changelog entries into user-friendly newsletter content for email, blog posts, and release notes. Use when converting CHANGELOG.md files, git commit logs, or release notes into customer-facing communications.

Use after completing user-visible features, fixes, or behavior changes - NOT for internal docs (CLAUDE.md, DECISIONS.md, _tasks/)

Analyzes uncommitted git changes and updates CHANGELOG.md and CLAUDE.md. Executes git commands, reads diffs, categorizes changes, and stages updated documentation automatically.

Checks and clamps mouse coordinates within transformed image bounds in WPF. Use when implementing measurement tools or annotations that should only work inside Pan/Zoom/Rotate transformed images.

Records browser workflows as annotated GIFs for documentation and tutorials. Use when creating visual documentation of browser interactions, recording step-by-step tutorials, or capturing workflows for support tickets. Triggers on phrases like 'record this workflow', 'create a GIF tutorial', 'document this process as GIF', 'show me how to do X as a GIF', or when user needs visual step-by-step documentation. Works with Chrome browser automation via MCP tools (tabs_context_mcp, gif_creator, computer).

Search and reference official Chromium documentation including design docs, APIs, and development guides

Creates annotated bibliography-style manifests for Claude projects, tracking files, conversation threads, and relationships with unique IDs and annotations. Use when documenting project contents, creating file inventories, tracking conversation history, or building navigable knowledge maps.

This skill should be used when creating or organizing working files in the .claude/ directory. It enforces consistent structure, naming conventions, and required cross-references for plans, architecture docs, examples, research, and analysis files.