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 AxiosLeo/node-koapp --skill koappgit clone --depth 1 https://github.com/AxiosLeo/node-koappWrote 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/axiosleo/node-koapp/koapp)<a href="https://agentmods.dev/skills/axiosleo/node-koapp/koapp"><img src="https://agentmods.dev/badge/skills/axiosleo/node-koapp/koapp/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/axiosleo/node-koapp/koapp"><img src="https://agentmods.dev/badge/skills/axiosleo/node-koapp/koapp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00086 | $0.01345 |
| Opus 5.5 | $0.00034 | $0.00538 |
| Sonnet 5.5 | $0.00017 | $0.00269 |
| Haiku 4.5 | $0.00009 | $0.00135 |
Grade A, and why
koapp 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 today.
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 — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.
@axiosleo/koapp Framework Overview
@axiosleo/koapp is a Node.js framework built on top of Koa that provides three runtime modes (HTTP, TCP, WebSocket) behind a unified Application base, plus batteries-included helpers for routing, validation, response shaping, and Server-Sent Events.
Minimum Node.js version: 16.0.0.
Installation
npm install @axiosleo/koapp
Core Exports
All symbols below come from require('@axiosleo/koapp'):
| Symbol | Kind | When to use |
|---|---|---|
KoaApplication |
Class | Stand up an HTTP server on top of Koa |
SocketApplication |
Class | Stand up a TCP socket server (Node net) |
WebSocketApplication |
Class | Stand up a WebSocket server (the ws library) |
Application |
Class | Base class, rarely instantiated directly |
Router |
Class | Define routes, path params, validators, nested routers |
Controller |
Class | Base class to organize request handlers with response helpers |
Model |
Class | Structured validation (via validatorjs) + object serialization |
success / failed / result / response / error |
Functions | Throw-style response helpers consumed by the framework's workflow |
HttpError / HttpResponse |
Classes | Throwable error/response objects |
middlewares.KoaSSEMiddleware |
Factory | Attach a Server-Sent Events stream to a Koa route |
middlewares.KoaSessionMiddleware |
Re-export | koa-session for custom setups |
initContext |
Function | Advanced: build a framework context for custom transports |
Full quick-start example lives in quick-start.md.
Class Hierarchy
EventEmitter
└── Application (src/apps/app.js)
├── KoaApplication (src/apps/koa.js) - HTTP
└── SocketApplication (src/apps/socket.js) - TCP
└── WebSocketApplication (src/apps/websocket.js) - WebSocket
WebSocketApplication inherits all connection-management helpers
(send, close, sendByConnectionId, closeByConnectionId, getConnection,
ping, broadcast) from SocketApplication. Only the send, close, and
broadcast transport wrappers are overridden.
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.
- today Changed · +1 lines 97ba918d99fe
- 1mo ago First seen · 118 lines · 86 tokens per session scan A 974207dd5419
koapp is a skill published in the GitHub repository AxiosLeo/node-koapp (143 stars, last pushed yesterday), licensed MIT. It adds 86 tokens to every session and 1,345 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 2026-08-30.
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