What is arch-fitness?

A command that defines and runs architecture rules, called fitness functions, to check whether a project still follows its intended design. These rules can check dependencies, layer boundaries, naming, file sizes, and imports.

Use it to run standard or custom rules against a repository, such as checking that a domain layer does not depend on infrastructure or presentation code.

It catches structural violations that ordinary tests may miss. The checks provide repeatable evidence that important architecture constraints are still being followed.

arch-fitness — Command for Claude Code by gonzalezpazmonica

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.

Clone the repo

git clone --depth 1 https://github.com/gonzalezpazmonica/pm-workspace

Made for: Claude Code.

Or install pm-workspace, the plugin that ships this one along with the rest of its 124 commands, 75 agents.

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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/gonzalezpazmonica/pm-workspace/arch-fitness/github.svg)](https://agentmods.dev/commands/gonzalezpazmonica/pm-workspace/arch-fitness)

Your own site

<a href="https://agentmods.dev/commands/gonzalezpazmonica/pm-workspace/arch-fitness"><img src="https://agentmods.dev/badge/commands/gonzalezpazmonica/pm-workspace/arch-fitness/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.

Your own site · 80×15

<a href="https://agentmods.dev/commands/gonzalezpazmonica/pm-workspace/arch-fitness"><img src="https://agentmods.dev/badge/commands/gonzalezpazmonica/pm-workspace/arch-fitness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 906 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.00015	$0.00906
Opus 5	$0.00008	$0.00453
Sonnet 5	$0.00003	$0.00181
Haiku 4.5	$0.00002	$0.00091

Measured 9d ago against content hash 3e491e92f1b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

arch-fitness 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 9d 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.

Origin

This is a copy

100% identical to arch-fitness — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/commands/arch-fitness.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/arch-fitness {repo|path}

Define y ejecuta reglas de integridad arquitectónica (fitness functions) para un proyecto.

Prerequisitos

Repositorio accesible
Recomendado: ejecutar /arch-detect primero

2. Cargar perfil de usuario

Leer .claude/profiles/active-user.md → obtener active_slug
Si hay perfil activo, cargar (grupo Architecture & Debt del context-map):
- profiles/users/{slug}/identity.md
- profiles/users/{slug}/projects.md
- profiles/users/{slug}/preferences.md
Adaptar profundidad del análisis según preferences.detail_level
Si no hay perfil → continuar con comportamiento por defecto

3. Parámetros

{repo|path} — Ruta local o repositorio
--rules {file} — (Opcional) Fichero custom de reglas
--fix — (Opcional) Sugerir fixes automáticos

4. Flujo de Ejecución

1. Detectar Patrón y Lenguaje

Si no hay detección previa, ejecutar detección rápida (solo estructura). Cargar reglas base del patrón detectado.

2. Definir Reglas de Fitness

Reglas automáticas según patrón:

Clean Architecture / Hexagonal:

CRITICAL: Domain NO importa Infrastructure
CRITICAL: Domain NO importa Presentation
WARNING: Application NO importa Presentation directamente
WARNING: No dependencias circulares entre capas

DDD:

CRITICAL: Aggregates solo accesibles via Repository
WARNING: Value Objects son inmutables (no setters públicos)
WARNING: Domain Events nombrados en pasado (OrderCreated, UserRegistered)

MVC / MVVM:

WARNING: Controllers/ViewModels NO acceden a DB directamente
WARNING: Views NO contienen lógica de negocio
CRITICAL: Models NO dependen de Views

Genéricas (todos los patrones):

WARNING: No ficheros >300 líneas (configurable)
WARNING: No más de 10 imports/dependencias por fichero
CRITICAL: No secrets hardcodeados (regex patterns)
WARNING: Naming conventions del patrón (sufijos esperados)

3. Ejecutar Análisis

Para cada regla:

Escanear ficheros relevantes
Buscar violaciones (imports, naming, estructura)
Clasificar: PASS / FAIL
Si FAIL: listar ficheros y líneas

Read the full file on GitHub · 119 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.

9d ago First seen · 119 lines · 15 tokens per session scan A 3e491e92f1b7

Subscribe to this mod's changes

arch-fitness is a command published in the GitHub repository gonzalezpazmonica/pm-workspace (49 stars, last pushed 6d ago), licensed MIT. It adds 15 tokens to every session and 906 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to arch-fitness, differing in 0 lines, and is treated as a copy.

Testing

prototype

You are building a proof-of-concept for the current Grainulator sprint. Read CLAUDE.md for sprint context and claims.json for existing research claims.

grainulation/grainulator · 0 tokens

qa-changes

This skill should be used when the user asks to "QA a pull request", "test PR changes", "verify a PR works", "functionally test changes", or when an automated workflow triggers QA validation of code changes. Provides a structured methodology for setting up the environment, exercising changed behavior, and reporting…

OpenHands/extensions · 63 tokens

arch-fitness