agentmods.dev

flutter-app-shell

flutter-app-shell is a skill for Claude Code, Codex from yendangn/flutter-app-builder. It costs 71 tokens per session (490 once invoked), scanned A, original, MIT.

A starting structure and setup guide for a new Flutter application, including environment entry points, shared services, navigation, themes, networking, and dependency registration.

In plain words
What is it for?
Use it when bootstrapping a Flutter app, setting up development, testing, and production variants, choosing dependencies, or creating the base folder structure.
Why use it?
It gives a new Flutter project a consistent foundation before individual features are added.

Skill for Claude CodeCodex

not rated 5 2mo ago A scan 71 tokens original MIT
View the source file yendangn/flutter-app-builder
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.

agentmods
npx agentmods add skills/yendangn/flutter-app-builder/flutter-app-shell
Any agent
npx skills add yendangn/flutter-app-builder --skill flutter-app-shell
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.

agentmods badge for flutter-app-shell

README.md
[![agentmods](https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-app-shell.svg)](https://agentmods.dev/skills/yendangn/flutter-app-builder/flutter-app-shell)
Your own site
<a href="https://agentmods.dev/skills/yendangn/flutter-app-builder/flutter-app-shell"><img src="https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-app-shell.svg" alt="Measured on agentmods" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 490 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00071 $0.00490
Opus 5 $0.00036 $0.00245
Sonnet 5 $0.00014 $0.00098
Haiku 4.5 $0.00007 $0.00049

Measured 3d ago against content hash 10659c0117ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

flutter-app-shell 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 3d 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-app-shell/SKILL.md · 49 lines

What it actually says

Flutter App Shell

Full reference: template.md

Folder structure

lib/
  main_dev.dart / main_uat.dart / main_prod.dart   ← flavor entry points
  src/
    app/
      app.dart                 ← MaterialApp.router, ThemeCubit, LocalizationService
      router/                  ← GoRouter, route constants
      theme/                   ← AppColors, AppSpacing, AppTypography, AppTheme
    core/
      base/                    ← BaseCubit, BaseState, UseCase, BaseRepository …
      config/                  ← Env, EnvConfig, AppConfig
      di/                      ← service_locator.dart (composition root)
      error/                   ← Failure hierarchy
      logging/                 ← AppLogger interface + LoggerImpl wrapper
      network/                 ← DioClient, ApiClient, interceptors
      …
    features/
      <feature>/
        data/   domain/   presentation/

Key rules

  • One pubspec.yaml at the Flutter root — exact version pins (no ^).
  • Three entry points: main_dev.dart, main_uat.dart, main_prod.dart. Each calls appBootstrap(Env.x).
  • service_locator.dart is the single composition root — getIt only registered there or in feature DI modules.
  • app.dart reads ThemeCubit and LocalizationService from getIt; never instantiates them directly.
  • All third-party packages are wrapped behind app-owned interfaces — never import a third-party package outside its designated wrapper file.
  • Run flutter pub get → build_runner (if codegen) → flutter analyze → flutter test after setup.

Co-load with

  • flutter-di — composition root rules
  • flutter-flavors — Env / AppConfig
  • flutter-theme — token setup
  • flutter-routing — GoRouter bootstrap
  • flutter-logging — AppLogger setup
Files

What ships with it

9 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.

  1. 3d ago First seen · 49 lines · 71 tokens per session scan A 10659c0117ac

Subscribe to this mod's changes

flutter-app-shell is a skill published in the GitHub repository yendangn/flutter-app-builder (5 stars, last pushed 2mo ago), licensed MIT. It adds 71 tokens to every session and 490 once invoked, about $0.0004 per session on Opus 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.

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