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 bovinphang/frontend-craft --skill fec-pwa-implementationgit clone --depth 1 https://github.com/bovinphang/frontend-craftWrote 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/bovinphang/frontend-craft/fec-pwa-implementation)<a href="https://agentmods.dev/skills/bovinphang/frontend-craft/fec-pwa-implementation"><img src="https://agentmods.dev/badge/skills/bovinphang/frontend-craft/fec-pwa-implementation/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/bovinphang/frontend-craft/fec-pwa-implementation"><img src="https://agentmods.dev/badge/skills/bovinphang/frontend-craft/fec-pwa-implementation.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 | $0.00087 | $0.00561 |
| Opus 5 | $0.00044 | $0.00280 |
| Sonnet 5 | $0.00017 | $0.00112 |
| Haiku 4.5 | $0.00009 | $0.00056 |
Grade A, and why
fec-pwa-implementation 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 9d 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
PWA 实现
用途
让 Web 应用具备可安装、离线兜底和可控更新能力。
流程
- 确认 PWA 是否值得做：面向移动端/桌面安装、弱网离线、重复访问场景时优先；纯内部后台、强实时流媒体或只需要普通缓存时不要强行 PWA。
- 先补齐 manifest、图标、主题色和 HTML 引用；图标至少覆盖 192/512，Android 需 maskable，iOS 需 apple touch icon。
- 注册 Service Worker，并设计更新提示；不要静默
skipWaiting()后强刷用户页面。 - 用 Workbox 或框架插件管理 precache/runtime cache；登录、支付、权限变更等敏感请求必须走网络。
- 提供 offline fallback 页面和安装提示 UI，并验证首次加载、离线访问、更新激活、卸载重装。
详细参考
- 需要 manifest 字段、HTML 引用、图标要求、截图和 iOS 注意事项时，加载 references/manifest-and-icons.md。
- 需要 Service Worker 注册、Workbox 策略、Vite 集成、离线兜底和更新流程时，加载 references/service-worker-workbox.md。
约束
- Service Worker 仅在 HTTPS 下工作（localhost 除外）。
- 缓存策略必须区分页面、静态资源、API 与敏感操作；不要把登录、支付、权限接口缓存起来。
- Service Worker 更新有生命周期延迟；用户可见刷新提示优先于强制刷新。
- iOS PWA 能力弱于 Android，安装、推送和生命周期都要单独验证。
- 缓存有配额和逐出机制，必须设置 max entries / max age。
预期输出
产出可安装的 Web 应用、离线 fallback、可见更新提示和明确缓存策略。验证 Lighthouse PWA、DevTools Application 面板、离线模式、更新发布和移动端安装流程。
What ships with it
2 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.
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.
- 9d ago First seen · 36 lines · 87 tokens per session scan A 489c34b48f39
fec-pwa-implementation is a skill published in the GitHub repository bovinphang/frontend-craft (21 stars, last pushed 8d ago), licensed MIT. It adds 87 tokens to every session and 561 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 2026-08-30.
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