A guide for wiring services and other dependencies into a Flutter app using dependency injection, which supplies objects where they are needed instead of creating them everywhere.

Use it to register storage, networking, databases, repositories, use cases, Cubits, and feature-specific services with getIt.

It keeps third-party packages behind app-owned interfaces and makes service lifetimes, registration order, and test replacements easier to control.

flutter-di — Skill for Claude Code and Codex by yendangn

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add yendangn/flutter-app-builder --skill flutter-di

Clone the repo

git clone --depth 1 https://github.com/yendangn/flutter-app-builder

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-di/github.svg)](https://agentmods.dev/skills/yendangn/flutter-app-builder/flutter-di)

Your own site

<a href="https://agentmods.dev/skills/yendangn/flutter-app-builder/flutter-di"><img src="https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-di/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/yendangn/flutter-app-builder/flutter-di"><img src="https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-di.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 467 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00076	$0.00467
Opus 5.5	$0.00030	$0.00187
Sonnet 5.5	$0.00015	$0.00093
Haiku 4.5	$0.00008	$0.00047

Measured 1mo ago against content hash 57d60eb3d084, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

flutter-di scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/flutter-di/SKILL.md · 52 lines

What it actually says

Flutter DI

Full reference: template.md

Key rules

Wrapper rule (non-negotiable)

Every third-party package is wrapped behind an app-owned interface. The interface lives in core/. The implementation (*_impl.dart) is the only file that imports the third-party package. Everything else depends on the interface.

core/logging/app_logger.dart          ← interface
core/logging/logger_impl.dart         ← only file that imports `package:logger/logger.dart`

Composition-root rule

getIt registrations happen only in:

lib/src/core/di/service_locator.dart (app-level)
lib/src/features/<feature>/di/<feature>_module.dart (feature-level)

Never call getIt.register* inside a widget, page, cubit, or repository.

Registration order (service_locator.dart)

Config (AppConfig)
Logging (AppLogger)
Storage (SecureStorage, KeyValueStore)
Network (DioClient, ApiClient)
Database (AppDatabase, DAOs)
Core services (Auth, Connectivity, Sync, Push, Permissions, Analytics…)
Repositories
Use cases
Cubits / BLoCs (registerFactory — never singleton)
Theme + Localization

Lifetimes

registerLazySingleton — services, repositories, data sources, API clients
registerFactory — cubits, BLoCs (new instance per page)
registerSingleton — early-init objects (logger, config)

Test override

getIt.allowReassignment = true;
getIt.registerSingleton<MyService>(FakeMyService());

Co-load with

Every other skill (DI binds to every file written)

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 52 lines · 76 tokens per session scan A 57d60eb3d084

Subscribe to this mod's changes

flutter-di is a skill published in the GitHub repository yendangn/flutter-app-builder (6 stars, last pushed 3mo ago), licensed MIT. It adds 76 tokens to every session and 467 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Mobile

orca-emulator-android

Android device and emulator control from inside Orca over adb, with the live device view in Orca's emulator pane. Use when driving an adb-connected emulator or phone on Windows, Linux, or macOS: booting AVDs, taps, swipes, typing, hardware buttons, rotation, app install and launch, runtime permissions, the…

stablyai/orca · 102 tokens

glance-canonical-layouts

Use this skill to create home screen widgets using Jetpack Glance Canonical Layouts from the Android Platform Samples project, or when asked to implement standard widget layout patterns (including Check List, Image Grid, Snap Scrolling, and Standard Toolbar).

android/skills · 56 tokens

android-tombstone-symbolication

Symbolicate the .NET runtime frames in an Android tombstone file. Extracts BuildIds and PC offsets from the native backtrace, downloads debug symbols from the Microsoft symbol server, and runs llvm-symbolizer to produce function names with source file and line numbers. USE FOR triaging a .NET MAUI or Mono Android app…

dotnet/skills · 176 tokens

dogfood

Systematically explore and test a mobile app on iOS/Android with agent-device to find bugs, UX issues, and other problems. Use when asked to dogfood, QA, exploratory test, find issues, bug hunt, or test this app on mobile.

callstack/agent-device · 55 tokens

winapp-maui

Package and sign .NET MAUI Windows apps with winapp: publish the Windows head first, then point packaging at the resolved resizetizer manifest. Use for a MAUI MSIX or signed unpackaged build, MAUI packaging in CI, or 'manifest contains unresolved placeholders' errors from winapp package.

microsoft/winappCli · 68 tokens

apple-search-ads

When the user wants to set up, optimize, or scale Apple Search Ads (ASA) campaigns — including keyword bidding, match types, campaign structure, Creative Product Sets, CPP routing, and ROAS optimization. Use when the user mentions "Apple Search Ads", "ASA", "Search Ads", "Search tab ads", "Today tab ads", "CPT"…

Eronred/aso-skills · 127 tokens