configuration-builder

configuration-builder is a skill for Claude Code, Codex from MichaelCereda/stampo. It costs 32 tokens per session (1,895 once invoked), scanned C, original, MIT.

A guide for creating command-line tools from YAML configurations, either from scratch or from MCP tool definitions.

In plain words
What is it for?
Use it to generate stampo configurations for new command-line tools or convert MCP server tools into shell commands.
Why use it?
It turns a plain-language tool idea or an existing MCP interface into a structured configuration for stampo, a CLI generator.

Skill for Claude CodeCodex

Part of the stampo plugin — 1 skill shipped together

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/michaelcereda/stampo/configuration-builder
Any agent
npx skills add MichaelCereda/stampo --skill configuration-builder
Clone the repo
git clone --depth 1 https://github.com/MichaelCereda/stampo

Made for: Claude Code, Codex.

Or install stampo, the plugin that ships this one along with the rest of its 1 skill.

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 configuration-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/michaelcereda/stampo/configuration-builder.svg)](https://agentmods.dev/skills/michaelcereda/stampo/configuration-builder)
Your own site
<a href="https://agentmods.dev/skills/michaelcereda/stampo/configuration-builder"><img src="https://agentmods.dev/badge/skills/michaelcereda/stampo/configuration-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,895 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 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 $0.00032 $0.01895
Opus 5 $0.00016 $0.00948
Sonnet 5 $0.00006 $0.00379
Haiku 4.5 $0.00003 $0.00189

Measured 4d ago against content hash 1e4d0828ac10, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

configuration-builder scanned grade C with 2 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 4d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://raw.githubusercontent.com/MichaelCereda/stampo/master/install.sh | sh

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://raw.githubusercontent.com/MichaelCereda/stampo/master/install.sh | sh
plugin/skills/configuration-builder/SKILL.md · 266 lines

How it starts

The opening of the file, as written. The whole thing — 266 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Stampo Builder

Create CLI tools powered by stampo. Two modes:

  1. Create a CLI from scratch - user describes commands, you generate stampo YAML configs
  2. Convert MCP tools to CLI - read MCP server definitions, generate equivalent stampo configs

About stampo

stampo is a CLI generator that turns YAML configs into complete command-line tools. Single static binary, zero runtime dependencies.

Prerequisites

Verify stampo is installed before generating configs:

stampo --version

If not installed, ask the user if they'd like you to install it. If they agree, detect the platform and use the appropriate method:

  • macOS/Linux (recommended):
    curl -fsSL https://raw.githubusercontent.com/MichaelCereda/stampo/master/install.sh | sh
    
  • Homebrew:
    brew install michaelcereda/stampo/stampo
    
  • From source (requires Rust):
    cargo install stampo
    

Do NOT install without the user's explicit consent.

Mode Detection

Ask the user:

What would you like to build?

  1. Create a CLI from scratch - describe the commands you need
  2. Convert MCP tools to CLI - turn MCP server tools into shell commands

If the user's message already makes their intent clear, skip the question.


Mode 1: Create CLI from Scratch

Flow

  1. Ask the user to describe their CLI: what it does, what commands it needs
  2. For each command, understand: description, flags (with types/descriptions), and the shell command to run
  3. If hierarchical commands, use subcommands nesting
  4. Generate valid stampo YAML config (version 2.0)
  5. Show config for review
  6. Ask whether to install it

YAML Generation Rules

version: "2.0"
name: "<name>"
description: "<description>"
commands:
  <command-name>:
    description: "<what it does>"
    flags:
      - name: "<flag-name>"
        short: "<single-char>"        # optional
        description: "<flag help text>"
    cmd:
      run:
        - "<shell command using ${{flag_name}} and ${{env.VAR}}>"

Read the full file on GitHub · 266 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. 4d ago First seen · 266 lines · 32 tokens per session scan C 1e4d0828ac10

Subscribe to this mod's changes

configuration-builder is a skill published in the GitHub repository MichaelCereda/stampo (5 stars, last pushed 9d ago), licensed MIT. It adds 32 tokens to every session and 1,895 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.