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 yendangn/flutter-app-builder --skill flutter-common-widgetsgit clone --depth 1 https://github.com/yendangn/flutter-app-builderWrote 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/yendangn/flutter-app-builder/flutter-common-widgets)<a href="https://agentmods.dev/skills/yendangn/flutter-app-builder/flutter-common-widgets"><img src="https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-common-widgets/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/yendangn/flutter-app-builder/flutter-common-widgets"><img src="https://agentmods.dev/badge/skills/yendangn/flutter-app-builder/flutter-common-widgets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00079 | $0.00725 |
| Opus 5.5 | $0.00032 | $0.00290 |
| Sonnet 5.5 | $0.00016 | $0.00145 |
| Haiku 4.5 | $0.00008 | $0.00072 |
Grade A, and why
flutter-common-widgets 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.
How it starts
The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Common Widgets
Full reference: template.md
Mandatory replacement table
Never use raw Material widgets in feature code — use the App equivalent:
| Raw (banned in features) | App replacement |
|---|---|
AppBar(...) |
AppTopBar / AppSliverTopBar |
ElevatedButton(...) |
AppPrimaryButton |
OutlinedButton(...) |
AppSecondaryButton |
TextButton(...) |
AppTextButton |
FilledButton(...) |
AppPrimaryButton |
TextFormField(...) |
AppTextField / AppPasswordField / AppSearchField |
Card(...) in feature |
AppCard |
ListTile(...) |
AppListTile |
Divider(...) |
AppDivider |
SizedBox(height: N) spacer |
AppSpacing.vXs etc. or VerticalSpace |
CircleAvatar(...) |
AppAvatar |
Chip(...) |
AppStatusChip / AppTag |
Badge(...) |
AppBadge |
CircularProgressIndicator(...) |
AppLoadingIndicator |
LinearProgressIndicator(...) |
AppLoadingIndicator variant |
SnackBar / ScaffoldMessenger |
AppDialog.showToast() |
raw empty Column+Icon+Text |
AppEmptyState |
raw error Column+Icon+Text |
AppErrorState |
Image.network(...) |
AppCachedImage |
Key rules
- All app widgets read colors/sizes from
AppTheme/AppColors/AppSpacing— never hardcode. - App widgets are in
lib/src/core/widgets/. Feature-private widgets stay infeatures/<feature>/presentation/widgets/. - Before writing a new widget, check if an App equivalent already exists.
DI context
Most App widgets are pure — constructed inline with const or new, no DI needed:
const AppPrimaryButton(onPressed: _submit, child: Text('Save'))
Widgets that depend on a service (e.g., AppCachedImage wraps cached_network_image) are self-contained — the wrapper import is internal. Feature code just passes data:
AppCachedImage(url: user.avatarUrl, width: 48, height: 48)
Only AppDialog is DI-registered (as a singleton via flutter-di) because it needs BuildContext-free access for cubit-driven toasts/confirms.
What ships with it
23 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/app_avatar.md 2.7 KB
- references/app_badge.md 2.0 KB
- references/app_button.md 6.5 KB
- references/app_cached_image.md 2.2 KB
- references/app_card.md 1.4 KB
- references/app_divider.md 1.3 KB
- references/app_empty_state.md 2.3 KB
- references/app_error_state.md 2.2 KB
- references/app_keyboard_dismisser.md 1.7 KB
- references/app_list_tile.md 1.4 KB
- references/app_password_field.md 2.0 KB
- references/app_search_bar.md 3.4 KB
- references/app_search_field.md 2.2 KB
- references/app_section_header.md 1.5 KB
- references/app_selectable_card.md 1.8 KB
- references/app_spacer.md 1.7 KB
- references/app_status_chip.md 1.8 KB
- references/app_tag.md 1.5 KB
- references/app_text_area.md 1.6 KB
- references/app_text_field.md 2.5 KB
- references/app_top_bar.md 1.6 KB
- references/common_barrel.md 872 B
- references/template.md 13 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.
- 1mo ago First seen · 64 lines · 79 tokens per session scan A b1afbdcf64aa
flutter-common-widgets is a skill published in the GitHub repository yendangn/flutter-app-builder (6 stars, last pushed 3mo ago), licensed MIT. It adds 79 tokens to every session and 725 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.
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