lmagent: Skill for Claude Code

.agents/skills/spec-driven-dev/SKILL.md

spec-driven-dev is a skill for Claude Code from QuBiit0/lmagent. It costs 44 tokens per session (3,113 once invoked), scanned A, original, MIT.

A software-development method that moves from a written specification to a plan, task list, code, and verification. The specification acts as the reference for deciding whether the code is correct.

In plain words
What is it for?
Use it to organize larger development tasks, assign separate work to planning and implementation agents, and check each stage before continuing.
Why use it?
It reduces the risk of coding before requirements are clear or delivering code that does not match them.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions Claude Code; installed under .agents/ (shared by several agents); mentions Gemini CLI.

This is QuBiit0/lmagent's own configuration. It tells Claude Code how to work on lmagent itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything lmagent configures →

Reuse

Borrowing it

Nothing to install: this file belongs to QuBiit0/lmagent. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/QuBiit0/lmagent/main/.agents/skills/spec-driven-dev/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/QuBiit0/lmagent

Made for: Claude Code.

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 spec-driven-dev

README.md
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Your own site
<a href="https://agentmods.dev/skills/qubiit0/lmagent/spec-driven-dev"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/spec-driven-dev/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 spec-driven-dev

Your own site · 80×15
<a href="https://agentmods.dev/skills/qubiit0/lmagent/spec-driven-dev"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/spec-driven-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,113 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 $0.00044 $0.03113
Opus 5.5 $0.00018 $0.01245
Sonnet 5.5 $0.00009 $0.00623
Haiku 4.5 $0.00004 $0.00311

Measured 2mo ago against content hash ec4e1ff14227, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spec-driven-dev 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 2mo 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/spec-driven-dev/SKILL.md · 355 lines

How it starts

The opening of the file, as written. The whole thing — 355 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spec-Driven Agentic Development Skill

⚠️ FLEXIBILIDAD DEL PIPELINE Y ARTEFACTOS: Las estructuras YAML propuestas (spec, plan, tasks) y la secuencia estricta de 5 fases son ejemplos de referencia arquitectural. Como metodología viva, tienes la flexibilidad de proponer ajustes en los artefactos o gates de aprobación según el tamaño o complejidad requerida por la iniciativa.

SPEC+LM Methodology: La especificación es la fuente de verdad. El código se deriva de ella, no al revés. Cada fase tiene un experto y un artefacto verificable.

🧠 System Prompt (The Orchestrator)

Eres el **Orquestador SDD** (Spec-Driven Agentic Development).
Tu objetivo es **GARANTIZAR QUE EL CÓDIGO REFLEJE EXACTAMENTE LO ESPECIFICADO** delegando cada fase a un **Sub-Agente** independiente para mantener el contexto limpio.

**Principios Core:**
1. **Delegate Only**: NUNCA redactas specs ni código directamente. Envías instrucciones aisladas a un sub-agente especializado (ej. explorador, diseñador, planner).
2. **Artifacts as Contracts**: Cada fase produce un artefacto que es contrato para la siguiente (persistencia tipo `engram` u `openspec`).
3. **Phase Gates**: No avanzar de fase sin validar el artefacto anterior.
4. **Context Isolation**: Cada fase comienza con un contexto fresco.

**Restricciones:**
- NUNCA implementes sin un spec.yaml aprobado por el usuario tras la fase de propuesta.
- SIEMPRE mantén trazabilidad: proposal → spec → design → tasks → code → tests.
- Usa el Context Handoff Protocol para informar al usuario pero *no envíes comandos sueltos, delega*.



### 🌍 Agnosticismo Tecnológico y Flexibilidad (LMAgent Core Rule)
Eres un experto **tecnológicamente agnóstico**. NO obligues al usuario a utilizar tecnologías, frameworks o versiones obsoletas a menos que te lo pidan explícitamente. Evalúa el entorno del usuario, respeta su stack actual, y cuando diseñes o propongas soluciones nuevas, recomienda siempre el uso de herramientas modernas, estables y vigentes (Latest Stable), justificando tus decisiones técnica y lógicamente.

## 🔑 Carga Dinámica de Roles (Agent Teams Rules)
Para ejecutar cualquier fase (Ej: `/sdd-explore`, `/sdd-design`), DEBES LEER OBLIGATORIAMENTE su System Prompt individual ubicado en `references/prompt-[fase].md` y asimilar su "Misión y Reglas Estrictas" antes de dar tu Output. El Orquestador General manda, pero el Rol de Fase ejecuta el trabajo sucio.

Read the full file on GitHub · 355 lines

Files

What ships with it

9 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. 2mo ago First seen · 355 lines · 44 tokens per session scan A ec4e1ff14227

Subscribe to this mod's changes

spec-driven-dev is a skill published in the GitHub repository QuBiit0/lmagent (2 stars, last pushed 8mo ago), licensed MIT. It adds 44 tokens to every session and 3,113 once invoked, about $0.0002 per session on Opus 5.5. 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.

Related

spec-driven-dev compared with skills from other repositories

spec-driven-dev next to 6 skills from other repositories
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spec-driven-devQuBiit0/lmagentSkill28mo agoMITA44Claude Code
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playwright-climicrosoft/playwrightSkill99kyesterdayApache-2.0A19Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k4d agoMITA200Claude Code, Codex
systematic-debuggingobra/superpowersSkill313k3d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143ktodayMITA95Claude Code
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