j-morgan6

Use when a form or operation manages parent and child records together — cast_assoc/cast_embed, on_replace, Ecto.Multi across tables, FK cascade design.

Use when writing GenServer, Supervisor, Task, Agent, or Registry code — init/handle_continue, call vs cast, supervision strategies, process naming.

Use when defining schemas, writing queries, or creating migrations — schema design, Repo usage, indexes, query composition.

Use when writing or refactoring core Elixir — pattern matching, case/cond/with, pipes, {:ok, _}/{:error, _} contracts. Baseline style for any .ex/.exs change not covered by a more specific skill.

Use when writing LiveView modules or HEEx templates — mount/handle_params lifecycle, assigns, streams, events, components.

Use when adding logging, metrics, or instrumentation — structured Logger usage, telemetry handler attachment, Ecto/Phoenix telemetry events.

Use when refactoring for duplication, complexity, or dead code — includes the plugin's on-demand analysis scripts.

Use when preparing releases or deployment config — runtime.exs vs compile-time config, release migrations, PHX_HOST/PHX_SERVER, assets, health checks.

MANDATORY for API client and Services work. Use before writing APIClient, any file under Services/, or any networking code.

MANDATORY when adding or updating icons in AppIcon.appiconset/. Enforces 1024x1024 sizing and the per-variant alpha rules (primary opaque, dark transparent, tinted opaque grayscale).

MANDATORY for auth token storage. Use before writing any code that stores, reads, or deletes authentication credentials.

MANDATORY when the user asks to add or scaffold a new feature or screen. Chains Model + ViewModel + View + APIClient extension + test stub in one pass.

MANDATORY for Info.plist work. Use before adding imports that require user permission (PhotosUI, AVFoundation camera, CoreLocation, ATT, HealthKit, Contacts, EventKit).

MANDATORY for iOS project initialization and project.yml work. Use before creating or editing project.yml, Package.swift, or the top-level directory layout.

MANDATORY for any AsyncImage rendering a URL from a JSON response. Use before writing AsyncImage(url:) anywhere in the View layer.

MANDATORY for model structs used in SwiftUI views (files under Models/), especially with NavigationLink(value:) or @Observable arrays. Use before writing custom Equatable or Hashable conformances.