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/joker-x-dev/flutterkit/fkit-previewnpx skills add Joker-x-dev/FlutterKit --skill fkit-previewgit clone --depth 1 https://github.com/Joker-x-dev/FlutterKitWhat 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 | $0.00069 | $0.00417 |
| Opus 5 | $0.00034 | $0.00209 |
| Sonnet 5 | $0.00014 | $0.00083 |
| Haiku 4.5 | $0.00007 | $0.00042 |
Grade A, and why
fkit-preview 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 2d 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.
What it actually says
FKit Preview
必读资料
先阅读 AGENTS.md、docs/flutter-kit/扩展/widget-preview.md、docs/flutter-kit/业务功能/view.md，再检查：
lib/core/ui/preview/app_preview_annotations.dartlib/core/ui/preview/app_preview.dart- 当前 Feature 已有 Preview
test/core/ui/preview/feature_preview_test.dart
工作流
- 区分完整页面和独立组件。完整页面默认使用
@ResponsivePreview()，组件使用@WidgetPreview()；只在明确需要单设备时使用 Mobile、Tablet 或 Foldable 注解。 - 将顶层
previewXxx函数放在当前 View/Widget 文件末尾，保持右侧预览聚焦当前文件。 - 页面通过构造参数注入 Logic，不依赖路由 Binding；不要为预览新增大量回调参数或复制 Content Widget。
- 网络、分页和刷新页面写入稳定的 Preview Data，并切换到成功状态；禁止真实网络、数据库或异步初始化。
- 组件使用真实业务模型的静态预览数据。组件正式 API 没有点击事件时，不为预览伪造
onTap。 - 检查手机、折叠屏、平板以及工具栏深浅色切换。
验证
运行 test/core/ui/preview/feature_preview_test.dart 与相关 Widget 测试。确认预览可独立构建、没有 overflow、没有 GetX 注册缺失，也没有真实外部请求。
What ships with it
1 file 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.
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.
- 2d ago First seen · 29 lines · 69 tokens per session scan A e0a19f54ebba
fkit-preview is a skill published in the GitHub repository Joker-x-dev/FlutterKit (110 stars, last pushed 1mo ago), licensed MIT. It adds 69 tokens to every session and 417 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 2026-08-30.
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