Agent skill

Koapp Controller

Organize route handlers into reusable classes by extending the @axiosleo/koapp Controller base class.

MITAuto-check passedDevelopment

Install Koapp Controller

skills CLI

$ npx skills add AxiosLeo/node-koapp --skill koapp-controller -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install AxiosLeo/node-koapp koapp-controller --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/AxiosLeo/node-koapp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/assets/skills/koapp-controller .claude/skills/koapp-controller && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "koapp-controller" agent skill from https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller into .claude/skills/koapp-controller/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "koapp-controller", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add AxiosLeo/node-koapp --skill koapp-controller -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install AxiosLeo/node-koapp koapp-controller --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/AxiosLeo/node-koapp.git skills-src && mkdir -p .agents/skills && cp -r skills-src/assets/skills/koapp-controller .agents/skills/koapp-controller && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "koapp-controller" agent skill from https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller into .agents/skills/koapp-controller/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "koapp-controller", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add AxiosLeo/node-koapp --skill koapp-controller -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install AxiosLeo/node-koapp koapp-controller --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/AxiosLeo/node-koapp.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/assets/skills/koapp-controller .cursor/skills/koapp-controller && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "koapp-controller" agent skill from https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller into .cursor/skills/koapp-controller/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "koapp-controller", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/AxiosLeo/node-koapp.git --path assets/skills/koapp-controller

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add AxiosLeo/node-koapp --skill koapp-controller -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install AxiosLeo/node-koapp koapp-controller --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/AxiosLeo/node-koapp.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/assets/skills/koapp-controller .gemini/skills/koapp-controller && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "koapp-controller" agent skill from https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller into .gemini/skills/koapp-controller/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "koapp-controller", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install AxiosLeo/node-koapp koapp-controller

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add AxiosLeo/node-koapp --skill koapp-controller -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/AxiosLeo/node-koapp.git skills-src && mkdir -p .github/skills && cp -r skills-src/assets/skills/koapp-controller .github/skills/koapp-controller && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "koapp-controller" agent skill from https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller into .github/skills/koapp-controller/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "koapp-controller", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add AxiosLeo/node-koapp --skill koapp-controller -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install AxiosLeo/node-koapp koapp-controller --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/AxiosLeo/node-koapp.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/assets/skills/koapp-controller .opencode/skills/koapp-controller && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "koapp-controller" agent skill from https://github.com/AxiosLeo/node-koapp/tree/main/assets/skills/koapp-controller into .opencode/skills/koapp-controller/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "koapp-controller", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: koapp-controller
GitHub stars: 145
Token cost: ~1.3k tokens
SKILL.md length: 380 words
Files: 2
Skills in repo: 8
Repo updated: Sep 16, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Organize route handlers into reusable classes by extending the @axiosleo/koapp Controller base class.

Grouping related handlers
SKILL.md covers Import, Instance API, Basic usage and Why use Controller over plain…, plus 7 more sections
Calls npx
Reusing response helpers (this.success/failed/result/response/error/log)

What it does

Koapp Controller is an agent skill from AxiosLeo/node-koapp. Organize route handlers into reusable classes by extending the @axiosleo/koapp Controller base class. Use when grouping related handlers, reusing response helpers (this.success/failed/result/response/error/log), sharing state across handlers, or scaffolding service modules for a koapp project.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `examples.md`).

It sits in Development, covering Project scaffolding. The repository describes itself as: About Design for quickly developing OpenAPI applications using Node.js. The licence is MIT.

When your agent uses it

Grouping related handlers
Reusing response helpers (this.success/failed/result/response/error/log)
Sharing state across handlers
Scaffolding service modules for a koapp project

Example prompts

“/koapp-controller”

Requirements

Node.js

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
Shell commands in SKILL.md call:
- npx
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.
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 Controller loads about 1.3k tokens when it runs. Until then it costs about 78 tokens; SKILL.md has 380 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~78
When it runs · the whole SKILL.md, loaded when a task matches: ~1.3k

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

Auto-check passed

The automated check found no risky patterns in SKILL.md.

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). 380 words, ~1,335 tokens.

Download SKILL.mdSave it as .claude/skills/koapp-controller/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: koapp-controller
description: Organize route handlers into reusable classes by extending the @axiosleo/koapp Controller base class. Use when grouping related handlers, reusing response helpers (this.success/failed/result/response/error/log), sharing state across handlers, or scaffolding service modules for a koapp project.

@axiosleo/koapp Controller

Source: src/controller.js.

Controller is a thin base class that mirrors the response helpers as instance methods. Extend it to keep related handlers together and share auxiliary state.

Import

javascript

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

Instance API

Method	Equivalent function	Notes
`this.success(data?, headers?)`	`success(data, headers)`	200 OK JSON envelope
`this.failed(data?, code?, status?, headers?)`	`failed(data, code, status, headers)`	Non-2xx JSON envelope
`this.result(data, status?, headers?)`	`result(data, status, headers)`	Raw body pass-through
`this.response(data, code, status?, headers?)`	`response(data, code, status, headers)`	Full control envelope
`this.error(status, msg, headers?)`	`error(status, msg, headers)`	Shortcut error envelope
`this.log(...data)`	`debug.log` from `@axiosleo/cli-tool`	Conditional logging

All this.success / failed / result / response / error throw, same as the functional helpers. See koapp-response for envelope details.

Basic usage

javascript

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

class HealthController extends Controller {
  async ping(context) {
    this.log('ping from', context.request_id);
    this.success({ pong: true });
  }

  async version() {
    this.success({ version: require('../package.json').version });
  }
}

const health = new HealthController();
const router = new Router('/health');
router.get('/ping', (ctx) => health.ping(ctx));
router.get('/version', () => health.version());

Why use Controller over plain functions?

Shared state: load DB handles, caches, or config once in the constructor and reuse across methods.
Inheritance: define a BaseController with common middlewares or helpers, then extend it per module (the init scaffolding template at assets/tmpl/services/src/modules/controller.ts.tmpl does this).
Testability: easier to mock a controller instance than free-floating functions.

Binding handlers to routes

Controller methods expect a context argument and may use this, so bind them explicitly when registering with the router:

javascript

router.get('/users/{:id}', (ctx) => controller.find(ctx));
router.post('/users', (ctx) => controller.create(ctx));

// or with arrow methods
class UsersController extends Controller {
  find = async (ctx) => {
    const id = Number(ctx.params.id);
    this.success({ id });
  };
}

Pure wrappers (ctx) => controller.method(ctx) preserve this and avoid .bind clutter.

Error handling

Since this.success / failed / ... throw, any code after them does not run. The workflow catches the throw and writes the response. Keep try / catch only where you intend to shape a different error:

javascript

async create(context) {
  try {
    const user = await this.db.users.insert(context.body);
    this.success({ id: user.id });
  } catch (err) {
    if (err.code === 'DUP_ENTRY') {
      this.failed({ email: context.body.email }, '409;Email Already Registered', 409);
    }
    throw err;  // let the workflow convert to 500
  }
}

Show full SKILL.md (150 more words)Show less

Logging

this.log is wired to debug.log from @axiosleo/cli-tool. Enable it by running with DEBUG=1 (or the cli-tool equivalent), or by setting debug: true on the application.

javascript

this.log('loading user', context.params.id);

Composing with validators

Validation stays on the router:

javascript

router.push('post', '/users', (ctx) => controller.create(ctx), {
  body: {
    rules: {
      name: 'required|string',
      email: 'required|email'
    }
  }
});

The validator runs before the handler, so by the time controller.create executes you already have a validated context.body.

Generator output

Running npx @axiosleo/koapp gen -d ./meta -o ./services/src/modules produces .controller.ts files that extend a project-local BaseController. That BaseController typically extends Controller and adds database handles:

typescript

import { Controller } from '@axiosleo/koapp';
import { mainDB } from '../services/db';

export class BaseController extends Controller {
  protected mainDB = mainDB;
}

Common pitfalls

Forgetting to pass context into instance methods: router.get('/x', controller.handler) loses this when the router calls the method as a free function. Use arrow wrappers.
Returning this.success(...) from a handler is redundant - the throw short-circuits execution.
Controllers are long-lived across requests; never stash per-request data on this. Use context or local variables instead.

Files

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

SKILL.md
examples.md

Open the folder on GitHubat commit 102955d

Compare with similar skills

Koapp Controller next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Koapp Controller compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Koapp Controller this skillAxiosLeo/node-koapp	145	—	~1.3k	Automated safety check: Pass	MIT	22 days ago
Nx Generatenomcopter/react-mosaic	4.8k	7 repos	~1.9k	Automated safety check: Pass	Custom licence	9 days ago
PonytailDavidObando/gsharp	565	8 repos	~1.7k	Automated safety check: Pass	MIT	today
Run Nx Generatornrwl/nx	29k	2 repos	~592	Automated safety check: Notes	MIT	today
Conductor Setupgemini-cli-extensions/conductor	3.8k	—	~4.2k	Automated safety check: Pass	Apache-2.0	1 mo ago
Mirage VFS Adapter Authoringstrukto-ai/mirage	3.7k	—	~2.5k	Automated safety check: Pass	Apache-2.0	today

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Questions about Koapp Controller

What does Koapp Controller do?

Organize route handlers into reusable classes by extending the @axiosleo/koapp Controller base class. Koapp Controller is an agent skill from AxiosLeo/node-koapp. Organize route handlers into reusable classes by extending the @axiosleo/koapp Controller base class.

When should I use Koapp Controller?

Koapp Controller fits situations like: grouping related handlers; reusing response helpers (this.success/failed/result/response/error/log); sharing state across handlers; scaffolding service modules for a koapp project.

How do I install Koapp Controller in Claude Code?

Run `npx skills add AxiosLeo/node-koapp --skill koapp-controller -a claude-code`. Or copy the skill folder (assets/skills/koapp-controller in AxiosLeo/node-koapp) into .claude/skills/koapp-controller in your project. Claude Code loads it when a task matches its description.

How do I install Koapp Controller in Codex?

Run `npx skills add AxiosLeo/node-koapp --skill koapp-controller -a codex`. Or copy the skill folder (assets/skills/koapp-controller in AxiosLeo/node-koapp) into .agents/skills/koapp-controller in your project. Codex loads it when a task matches its description.

Can I use Koapp Controller in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add AxiosLeo/node-koapp --skill koapp-controller -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/koapp-controller, .gemini/skills/koapp-controller, .github/skills/koapp-controller and .opencode/skills/koapp-controller in your project.

What does Koapp Controller need to run?

Going by SKILL.md and its folder, Koapp Controller needs the command-line tools its instructions call (npx). Our summary lists: Node.js.

Does Koapp Controller access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Koapp Controller safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Koapp Controller use?

Koapp Controller is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Koapp Controller use?

About 1.3k tokens (SKILL.md is roughly 5.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Koapp Controller?

Skills that share tags, products or a category with Koapp Controller: Nx Generate (nomcopter/react-mosaic, 4.8k stars), Ponytail (DavidObando/gsharp, 565 stars), Run Nx Generator (nrwl/nx, 29k stars) and Conductor Setup (gemini-cli-extensions/conductor, 3.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Koapp Controller?

AxiosLeo (a GitHub user) maintains it in AxiosLeo/node-koapp, which has 145 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on September 16, 2026.

Source: AxiosLeo/node-koapp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Koapp Controller

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

@axiosleo/koapp Controller

Import

Instance API

Basic usage

Why use Controller over plain functions?

Binding handlers to routes

Error handling

Logging

Composing with validators

Generator output

Common pitfalls

See also

Files

Compare with similar skills

Similar skills

More from AxiosLeo/node-koapp

Related

Questions about Koapp Controller