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 agentmods add skills/yendangn/flutter-app-builder/flutter-localizationnpx skills add yendangn/flutter-app-builder --skill flutter-localizationgit clone --depth 1 https://github.com/yendangn/flutter-app-builderWhat 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 | $0.00065 | $0.00560 |
| Opus 5 | $0.00032 | $0.00280 |
| Sonnet 5 | $0.00013 | $0.00112 |
| Haiku 4.5 | $0.00006 | $0.00056 |
Grade A, and why
flutter-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 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.
How it starts
The opening of the file, as written. The whole thing — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Localization
Full reference: template.md
Key rules
LocalizationServiceis the app-owned interface. Never importflutter_localizationoutsidelocalization_service_impl.dart.- All user-facing strings live in
assets/i18n/<locale>.json. No hardcoded strings in widget or cubit code. - Translation key access:
context.tr('key')in build methods (auto-rebuilds on locale change viacontext.watch<LocaleCubit>()). Never callgetIt<LocalizationService>().translate()directly in widgets — usecontext.tr(). - Plural support: keys are
key_zero,key_one,key_other. CalllocalizationService.plural('key', count). - Dynamic locale switch:
LocaleCubit.setLanguage(locale)→safeEmit(locale)→ all widgets callingcontext.tr()rebuild (viacontext.watch<LocaleCubit>()). ProvideLocaleCubitat the app root.MaterialApprebuilds viaBlocBuilder<LocaleCubit, Locale>. - RTL:
LocalizationService.isRtl→ useDirectionalitywidget orTextDirection.rtlfor affected widgets. - Date/number/currency formatting: use
AppFormatter(wrapsintl) — neverDateFormat(...)directly in widgets. - Validator error messages must use localization keys, never raw strings.
- Add new locales: add
<locale>.json, register locale inLocalizationServiceImpl, declare inMaterialApp.router.
Files
assets/i18n/
en.json ← source of truth for keys
vi.json ← secondary locale
lib/src/core/localization/
localization_service.dart ← interface
localization_service_impl.dart ← only file importing flutter_localization
locale_cubit.dart ← Cubit<Locale> — drives reactive locale switching
app_formatter.dart ← date/number/currency formatters (wraps intl)
Co-load with
flutter-di—LocalizationService+AppFormatter+LocaleCubitregistrationflutter-storage— persist selected locale inKeyValueStoreflutter-theme— locale affects text directionflutter-base-classes—LocaleCubitusesSafeEmitMixin
What ships with it
8 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.
- references/di_and_app_integration.md 4.0 KB
- references/extensions_and_formatter.md 4.4 KB
- references/locale_cubit_and_keys.md 5.6 KB
- references/localization_service.md 4.2 KB
- references/rtl_support.md 1.7 KB
- references/rules_and_antipatterns.md 3.0 KB
- references/template.md 5.6 KB
- references/testing.md 4.2 KB
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.
- 3d ago First seen · 41 lines · 65 tokens per session scan A 65ba3b1b9dba
flutter-localization is a skill published in the GitHub repository yendangn/flutter-app-builder (5 stars, last pushed 2mo ago), licensed MIT. It adds 65 tokens to every session and 560 once invoked, about $0.0003 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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