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 koapp-routergit 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-router)<a href="https://agentmods.dev/skills/axiosleo/node-koapp/koapp-router"><img src="https://agentmods.dev/badge/skills/axiosleo/node-koapp/koapp-router/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-router"><img src="https://agentmods.dev/badge/skills/axiosleo/node-koapp/koapp-router.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
SkillSpector: 1 finding, up to low
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- low Excessive Agency · line 174 Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.Fix: Limit the skill's scope to its documented purpose. Remove instructions that enable the agent to perform actions outside its stated functionality.
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 | $0.01638 |
| Opus 5.5 | $0.00035 | $0.00655 |
| Sonnet 5.5 | $0.00017 | $0.00328 |
| Haiku 4.5 | $0.00009 | $0.00164 |
Grade A, and why
koapp-router 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 — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.
@axiosleo/koapp Router
Source: src/router.js.
Router is the single route-definition primitive for all three application
types (KoaApplication, SocketApplication, WebSocketApplication). A
router can be flat or a tree of sub-routers, and it carries middlewares,
handlers, after-handlers, and validators.
Constructor
const { Router } = require('@axiosleo/koapp');
const router = new Router(prefix, options);
| Arg | Type | Default | Notes |
|---|---|---|---|
prefix |
string |
'' |
Path prefix like /api/v1 or /users/{:id} |
options.method |
string |
'' |
HTTP method. Use 'any' for all methods. Empty string disables the route |
options.handlers |
Function[] |
[] |
Async handler functions async (context) => { ... } |
options.middlewares |
Function[] |
[] |
Run before handlers |
options.afters |
Function[] |
[] |
Run after handlers (even on thrown response) |
options.validators |
object |
{} |
{ params, query, body } - each { rules, messages? } |
Any unknown keys on options are kept on the router instance as-is.
Path params
Use {:name} for path parameters. Legacy :name also works but {:name}
is preferred:
new Router('/users/{:id}/posts/{:postId}', {
method: 'GET',
handlers: [async (context) => {
const { id, postId } = context.params;
}]
});
Wildcards:
/*- matches one segment (captured asparams.<next>if named)/**- matches one segment without capture/***- matches any remaining path, ideal for fallback handlers
HTTP method shortcuts
Each method shortcut creates a nested sub-router:
const root = new Router('/api');
root.get('/users', listUsers);
root.post('/users', createUser, {
body: { rules: { name: 'required|string', email: 'required|email' } }
});
root.put('/users/{:id}', updateUser);
root.patch('/users/{:id}', patchUser);
root.delete('/users/{:id}', deleteUser);
root.any('/health', healthcheck);
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.
- 1mo ago First seen · 212 lines · 87 tokens per session scan A b9aab8f21c37
koapp-router is a skill published in the GitHub repository AxiosLeo/node-koapp (143 stars, last pushed yesterday), licensed MIT. It adds 87 tokens to every session and 1,638 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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