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 artusjs/artusx --skill artusx-best-practicesgit clone --depth 1 https://github.com/artusjs/artusxWrote 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/artusjs/artusx/artusx-best-practices)<a href="https://agentmods.dev/skills/artusjs/artusx/artusx-best-practices"><img src="https://agentmods.dev/badge/skills/artusjs/artusx/artusx-best-practices/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/artusjs/artusx/artusx-best-practices"><img src="https://agentmods.dev/badge/skills/artusjs/artusx/artusx-best-practices.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 | $0.00077 | $0.02508 |
| Opus 5 | $0.00039 | $0.01254 |
| Sonnet 5 | $0.00015 | $0.00502 |
| Haiku 4.5 | $0.00008 | $0.00251 |
Grade A, and why
artusx-best-practices 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 10d 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 — 408 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ArtusX Best Practices
Quick Start
Install ArtusX CLI
npm install -g @artusx/init
Create New Application
# Create a web application
artusx-init --name web --type apps
# Create a plugin
artusx-init --name postgres --type plugins
# Create a library
artusx-init --name common --type libs
Run Your Application
cd web
npm install
npm run dev
Package Types
| Type | Description | Example |
|---|---|---|
| apps | Web applications | artusx-koa, artusx-nest |
| plugins | ArtusX plugins | plugin-redis, plugin-sequelize |
| libs | Shared libraries | @artusx/core, @artusx/utils |
Note: If you're developing ArtusX itself (contributing to the monorepo), see
references/rush-workflow.mdfor Rush.js commands.
Common Tasks
Create a New Plugin
Standard plugin structure:
packages/plugins/mongodb/src/
├── client.ts # Client with @Injectable
├── constants.ts # InjectEnum definitions
├── lifecycle.ts # @LifecycleHookUnit with hooks
├── index.ts # Export entry point
└── config/config.default.ts # Default configuration
client.ts:
import { Injectable, ScopeEnum } from '@artus/core';
import { InjectEnum } from './constants';
@Injectable({ id: InjectEnum.MongoDB, scope: ScopeEnum.SINGLETON })
export default class MongoDBClient {
async init(config: MongoDBConfig) {
if (!config) return;
// Initialize client
}
getClient() { return this.client; }
}
constants.ts:
export enum InjectEnum {
MongoDB = 'ARTUSX_MONGODB',
}
lifecycle.ts:
import { LifecycleHookUnit, LifecycleHook, Inject, ArtusInjectEnum, Logger } from '@artus/core';
@LifecycleHookUnit()
export default class MongoDBLifecycle implements ApplicationLifecycle {
@Inject(ArtusInjectEnum.Application) app: ArtusApplication;
@Inject(ArtusInjectEnum.Logger) logger: Logger;
@LifecycleHook()
async willReady() {
const config = this.app.config.mongodb;
if (!config || !config.uri) return;
this.logger.info('MongoDB plugin initializing...');
const client = this.app.container.get(InjectEnum.MongoDB);
await client.init(config);
this.logger.info('MongoDB plugin initialized successfully');
}
}
// Verify lifecycle.ts is exported in index.ts:
// export { default as MongoDBLifecycle } from './lifecycle';
What ships with it
7 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.
- 10d ago First seen · 408 lines · 77 tokens per session scan A 34254dc15f04
artusx-best-practices is a skill published in the GitHub repository artusjs/artusx (11 stars, last pushed 2mo ago), licensed MIT. It adds 77 tokens to every session and 2,508 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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