Agent-skills-standard ios-dependency-injection

Configure protocol-based DI with property wrappers and Factory/Swinject. Use when setting up dependency injection or factory patterns in iOS. (triggers: **/*.swift, @Injected, Resolver, Container, Swinject, register, resolve)

install

source · Clone the upstream repo

git clone https://github.com/HoangNguyen0403/agent-skills-standard

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/HoangNguyen0403/agent-skills-standard "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/ios/ios-dependency-injection" ~/.claude/skills/hoangnguyen0403-agent-skills-standard-ios-dependency-injection && rm -rf "$T"

manifest: skills/ios/ios-dependency-injection/SKILL.md

source content

iOS Dependency Injection

Priority: P0

Implementation Workflow

Prefer initializer injection — Pass dependencies through
```
init
```
as primary approach.
Inject protocols — Always depend on protocols instead of concrete classes for testability.
Choose DI library — Use
```
Factory
```
for lightweight DI,
```
Swinject
```
for enterprise-grade container-based projects.
Apply correct scoping — Singleton for app-wide services (Auth, Network); Unique/Transient for ViewModels; Graph/Cached for feature flows.

See protocol-based DI and Factory registration examples

Anti-Patterns

No Global Singletons: Inject services via initializer
No Inline Service Resolution: Pass dependencies via constructor; avoid
```
Resolver.resolve()
```
in business logic
No Concrete Class Dependencies: Depend on protocols for testability

References

Manual & Library DI Setup