Flutter Agent Plugins is a collection maintained by the Flutter team that extends coding agents with Flutter-specific skills, rules, MCP configuration, and bundled workflows. Flutter developers use it to help agents perform tasks such as testing and building widget previews. The catalogue entries are components of these agent plugins.
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.
npx skills add flutter/agent-plugins --skill flutter-setup-localizationgit clone --depth 1 https://github.com/flutter/agent-pluginsWrote 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.
[](https://agentmods.dev/skills/flutter/agent-plugins/flutter-setup-localization)<a href="https://agentmods.dev/skills/flutter/agent-plugins/flutter-setup-localization"><img src="https://agentmods.dev/badge/skills/flutter/agent-plugins/flutter-setup-localization/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.
<a href="https://agentmods.dev/skills/flutter/agent-plugins/flutter-setup-localization"><img src="https://agentmods.dev/badge/skills/flutter/agent-plugins/flutter-setup-localization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00052 | $0.01439 |
| Opus 5.5 | $0.00021 | $0.00576 |
| Sonnet 5.5 | $0.00010 | $0.00288 |
| Haiku 4.5 | $0.00005 | $0.00144 |
Grade A, and why
flutter-setup-localization 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- flutter-setup-localization — 97% identical, 11 lines differ
How it starts
The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Internationalizing Flutter Applications
Contents
Core Concepts
Flutter handles internationalization (i18n) and localization (l10n) via the flutter_localizations and intl packages. The standard approach uses App Resource Bundle (.arb) files to define localized strings, which are then compiled into a generated AppLocalizations class for type-safe access within the widget tree.
Setup Workflow
Copy and track this checklist when initializing internationalization in a Flutter project:
- Task Progress
- 1. Add dependencies to
pubspec.yaml. - 2. Enable the
generateflag. - 3. Create the
l10n.yamlconfiguration file. - 4. Configure
MaterialApporCupertinoApp.
- 1. Add dependencies to
1. Add Dependencies
Add the required localization packages to the project. Execute the following commands in the terminal:
flutter pub add flutter_localizations --sdk=flutter
flutter pub add intl:any
Verify your pubspec.yaml includes the following under dependencies:
dependencies:
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
intl: any
2. Enable Code Generation
Open pubspec.yaml and enable the generate flag within the flutter section to automate localization tasks:
flutter:
generate: true
3. Create Configuration File
Create a new file named l10n.yaml in the root directory of the Flutter project. Define the input directory, template file, and output file:
arb-dir: lib/l10n
template-arb-file: app_en.arb
output-localization-file: app_localizations.dart
synthetic-package: true
4. Configure the App Entry Point
Import the generated localizations and the flutter_localizations library in your main.dart. Inject the delegates and supported locales into your MaterialApp or CupertinoApp.
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 · 211 lines · 52 tokens per session scan A dda4ef8b7497
flutter-setup-localization is a skill published in the GitHub repository flutter/agent-plugins (3,069 stars, last pushed today), licensed BSD-3-Clause. It adds 52 tokens to every session and 1,439 once invoked, about $0.0002 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 2026-08-30.
Other skills, from other repositories
asc-localize-metadata
Automatically translate and sync App Store metadata (description, keywords, what's new, subtitle) to multiple languages using LLM translation and asc CLI. Use when asked to localize an app's App Store listing, translate app descriptions, or add new languages to App Store Connect.
asc-metadata-sync
Sync, validate, and apply App Store metadata and store assets with asc. Use when updating localizations, keywords, App Clip or preview assets, Asset Library media and placements, or migrating legacy fastlane metadata.
asc-in-app-events
Create and localize App Store in-app events, upload event media, and submit or recover event review submissions with asc. Use when managing in-app events, event card or details page assets, or event-specific submission errors.
maui-localization-theming
Implement MAUI localization and theming. USE FOR: RESX/AppResources, runtime culture switching, RTL/FlowDirection, platform language metadata, AppThemeBinding, DynamicResource, light/dark/system themes, UserAppTheme. DO NOT USE FOR: general layout, accessibility audits, icon/splash assets.
localization-l10n
Implement localization (l10n) best practices to adapt applications for specific regions, languages, and cultural preferences.
android-resources
Organize Android strings, drawables, fonts, themes, localization, and concrete resource-backed Compose values such as MaterialTheme colors. Use for resource declarations and their direct UI lookup; defer design-system token architecture, network image loading, lint-rule configuration, and general Compose…