Koapp Router

What it does

When your agent uses it

• Declaring HTTP/WebSocket/TCP routes in koapp
• Adding path params like /users/{:id}
• Composing nested routers
• Attaching per-route middlewares

Example prompts

• “/koapp-router”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

1. 1Walk the router tree by path segments, preferring static matches over * / / *`
2. 2When multiple candidates remain, prefer the one whose method list includes the request method (or ANY)
3. 3If nothing matches, follow the nearest /*** fallback
4. 4If even that misses, the framework lets the next Koa middleware run (typically 404)

What it can do on your machine

Read from SKILL.md and the folder at commit 102955d. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are javascript).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Koapp Router loads about 1.6k tokens when it runs. Until then it costs about 99 tokens; SKILL.md has 484 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~99

When it runs · the whole SKILL.md, loaded when a task matches

~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from AxiosLeo/node-koapp at commit 102955d, republished under its MIT licence (© AxiosLeo). 484 words, ~1,610 tokens.

name

koapp-router

description

Define routes, path parameters, validators, and nested routers with the @axiosleo/koapp Router class. Use when declaring HTTP/WebSocket/TCP routes in koapp, adding path params like /users/{:id}, composing nested routers, attaching per-route middlewares or after-handlers, validating params/query/body with validatorjs rules, or using shortcut helpers (get/post/put/patch/delete/any).

const { Router } = require('@axiosleo/koapp');

const router = new Router(prefix, options);

new Router('/users/{:id}/posts/{:postId}', {
  method: 'GET',
  handlers: [async (context) => {
    const { id, postId } = context.params;
  }]
});

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);

root.push('copy', '/resources/{:id}', async (context) => { ... });

root.push('get|post', '/multi', async (context) => {
  // handles both GET and POST
});

const api = new Router('/api');
const v1 = new Router('/v1');
const users = new Router('/users');

users.get('/{:id}', async (context) => { ... });

v1.add(users);           // /api/v1/users/{:id}
api.add(v1);

api.add('/admin', adminUserRouter, adminRoleRouter);

api.new('/internal', { middlewares: [authMiddleware] });

const root = new Router(null, {
  middlewares: [
    async (context) => {
      console.log(`[${context.method}] ${context.pathinfo}`);
    }
  ],
  afters: [
    async (context) => {
      console.log('response:', context.response);
    }
  ]
});

root.new('/items/{:id}', {
  method: 'PUT',
  handlers: [updateItem],
  validators: {
    params: {
      rules: { id: 'required|integer' }
    },
    query: {
      rules: { include: 'in:profile,settings' }
    },
    body: {
      rules: {
        name: 'required|string',
        price: 'required|numeric|min:0'
      },
      messages: {
        required: 'The :attribute field is required.'
      }
    }
  }
});

root.any('/***', async (context) => {
  result('Not Found', 404, { 'Content-Type': 'text/plain' });
});

© AxiosLeo, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in assets/skills/koapp-router of AxiosLeo/node-koapp.

• SKILL.md
• examples.md

Open the folder on GitHubat commit 102955d