new-module

new-module is a skill for Claude Code, Codex from antosubash/SimpleModule. It costs 35 tokens per session (1,231 once invoked), scanned A, original, MIT.

Scaffold a new SimpleModule module with contracts, implementation, and test projects following the project's modular monolith conventions. Use when creating a new module from scratch.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/antosubash/simplemodule/new-module
Any agent
npx skills add antosubash/SimpleModule --skill new-module
Clone the repo
git clone --depth 1 https://github.com/antosubash/SimpleModule

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for new-module

README.md
[![agentmods](https://agentmods.dev/badge/skills/antosubash/simplemodule/new-module.svg)](https://agentmods.dev/skills/antosubash/simplemodule/new-module)
Your own site
<a href="https://agentmods.dev/skills/antosubash/simplemodule/new-module"><img src="https://agentmods.dev/badge/skills/antosubash/simplemodule/new-module.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,231 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00035 $0.01231
Opus 5 $0.00017 $0.00616
Sonnet 5 $0.00007 $0.00246
Haiku 4.5 $0.00003 $0.00123

Measured today against content hash 0a00360ca16c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

new-module 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.

.claude/skills/new-module/SKILL.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

New Module Scaffolding

When the user asks to create a new module, follow these steps exactly.

Required Input

  • Module name (e.g., "Payments")

Steps

1. Create Contracts Project

Create modules/<Name>/src/SimpleModule.<Name>.Contracts/:

SimpleModule..Contracts.csproj:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
    <OutputType>Library</OutputType>
  </PropertyGroup>
  <ItemGroup>
    <ProjectReference Include="..\..\..\..\framework\SimpleModule.Core\SimpleModule.Core.csproj" />
  </ItemGroup>
</Project>

Constants.cs:

namespace SimpleModule.<Name>.Contracts;

public static class <Name>Constants
{
    public const string ModuleName = "<Name>";
    public const string RoutePrefix = "/api/<name-lowercase>";
}

IContracts.cs:

using System.Diagnostics.CodeAnalysis;

namespace SimpleModule.<Name>.Contracts;

[SuppressMessage("Design", "CA1040:Avoid empty interfaces", Justification = "Contracts placeholder")]
public interface I<Name>Contracts
{
}

2. Create Implementation Project

Create modules/<Name>/src/SimpleModule.<Name>/:

SimpleModule..csproj:

<Project Sdk="Microsoft.NET.Sdk.StaticWebAssets">
  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
    <ProjectReference Include="..\..\..\..\framework\SimpleModule.Core\SimpleModule.Core.csproj" />
    <!-- Add only if the module owns a DbContext:
    <ProjectReference Include="..\..\..\..\framework\SimpleModule.Database\SimpleModule.Database.csproj" /> -->
    <ProjectReference Include="..\SimpleModule.<Name>.Contracts\SimpleModule.<Name>.Contracts.csproj" />
  </ItemGroup>
</Project>

Module.cs:

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using SimpleModule.Core;
using SimpleModule.Core.Menu;
using SimpleModule.<Name>.Contracts;

namespace SimpleModule.<Name>;

[Module(<Name>Constants.ModuleName, RoutePrefix = <Name>Constants.RoutePrefix, ViewPrefix = "/<name-lowercase>")]
public class <Name>Module : IModule
{
    public void ConfigureServices(IServiceCollection services, IConfiguration configuration)
    {
        services.AddScoped<I<Name>Contracts, <Name>ContractsService>();
    }

    public void ConfigureMenu(IMenuBuilder menus)
    {
        menus.Add(
            new MenuItem
            {
                Label = "<Name>",
                Url = "/<name-lowercase>",
                Icon = """<svg class="w-4 h-4" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24"><path d="M4 6h16M4 12h16M4 18h16"/></svg>""",
                Order = 50,
                Section = MenuSection.AppSidebar,
            }
        );
    }
}

Read the full file on GitHub · 154 lines

Changes

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.

  1. today First seen · 154 lines · 35 tokens per session scan A 0a00360ca16c

Subscribe to this mod's changes

new-module is a skill published in the GitHub repository antosubash/SimpleModule (5 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 1,231 once invoked, about $0.0002 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 2026-09-04.

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