engineering-reuse

engineering-reuse is a skill for Claude Code, Codex from Mazalucas/El-DT-Lightweight-Army. It costs 62 tokens per session (467 once invoked), scanned A, original, MIT.

A reuse-first method for writing code: inspect the repository and its libraries before creating anything new, then make the smallest change that fits existing conventions.

In plain words
What is it for?
Use it before implementing or proposing executable code. It helps decide whether to extend, combine, or create a component and requires documenting what existing code was reused.
Why use it?
It reduces duplicated code, unnecessary files, and changes that conflict with the project’s structure. It applies the same decision process to backend code, interfaces, infrastructure, tests, and video-rendering code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it before implementing or proposing executable code. It helps decide whether to extend, combine, or create a component and requires documenting what existing code was reused.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mazalucas/el-dt-lightweight-army/engineering-reuse
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.

Any agent
npx skills add Mazalucas/El-DT-Lightweight-Army --skill engineering-reuse
Clone the repo
git clone --depth 1 https://github.com/Mazalucas/El-DT-Lightweight-Army

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 engineering-reuse

README.md
[![agentmods](https://agentmods.dev/badge/skills/mazalucas/el-dt-lightweight-army/engineering-reuse/github.svg)](https://agentmods.dev/skills/mazalucas/el-dt-lightweight-army/engineering-reuse)
Your own site
<a href="https://agentmods.dev/skills/mazalucas/el-dt-lightweight-army/engineering-reuse"><img src="https://agentmods.dev/badge/skills/mazalucas/el-dt-lightweight-army/engineering-reuse/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.

agentmods 80×15 button for engineering-reuse

Your own site · 80×15
<a href="https://agentmods.dev/skills/mazalucas/el-dt-lightweight-army/engineering-reuse"><img src="https://agentmods.dev/badge/skills/mazalucas/el-dt-lightweight-army/engineering-reuse.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 467 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 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 5.1 $0.00062 $0.00467
Opus 5 $0.00031 $0.00234
Sonnet 5 $0.00012 $0.00093
Haiku 4.5 $0.00006 $0.00047

Measured 11d ago against content hash 6b0b256260dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

engineering-reuse 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 11d 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.

.agents/skills/engineering-reuse/SKILL.md · 50 lines

What it actually says

Protocolos DT (heredar)

Aplica los protocolos del Director Técnico: ordenar, cuestionar, alternativas, Puntos ciegos / Mejoras detectadas.

Cuándo usar

Siempre antes de escribir o proponer código ejecutable — solo o como subagente (arquitecto, frontend, devops, qa, remotion-producer).

Regla transversal: 15-engineering-reuse. Referencia humana: docs/03_reference/engineering-reuse-default.md (DOC-REF-006).

Jerarquía (memorizar)

repo existente → design system / lib del proyecto → primitivas del framework → nuevo (documentado)

Detalle: references/reuse-hierarchy.md.

Pipeline obligatorio

  1. Discoverreferences/discover-before-create.md por capa (backend, UI, infra, tests, Remotion).
  2. Decidir — extender vs componer vs crear (references/reuse-hierarchy.md).
  3. Implementar — diff mínimo; match convenciones del repo.
  4. Entregarreferences/deliverable-template.md (sección Qué reutilicé).

Anti-patterns

Ver references/anti-patterns.md. Señalar duplicación propuesta antes de implementar.

Evals

Casos de regresión: evals/evals.json.

Routing

Pedido Rol especializado
Solo arquitectura/spec backend arquitecto (+ esta skill)
Solo UI frontend (+ esta skill)
Solo CI/deploy devops (+ esta skill)
Solo tests qa (+ esta skill)
Solo Remotion remotion-producer (+ esta skill)

Esta skill complementa skills de rol; no las reemplaza.

Files

What ships with it

5 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.

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. 11d ago First seen · 50 lines · 62 tokens per session scan A 6b0b256260dd

Subscribe to this mod's changes

engineering-reuse is a skill published in the GitHub repository Mazalucas/El-DT-Lightweight-Army (4 stars, last pushed 1mo ago), licensed MIT. It adds 62 tokens to every session and 467 once invoked, about $0.0003 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 2026-08-31.

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