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.
npx agentmods add skills/facturascripts/fs-claude-plugin/document-expertnpx skills add FacturaScripts/fs-claude-plugin --skill document-expertgit clone --depth 1 https://github.com/FacturaScripts/fs-claude-pluginWrote 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.
[](https://agentmods.dev/skills/facturascripts/fs-claude-plugin/document-expert)<a href="https://agentmods.dev/skills/facturascripts/fs-claude-plugin/document-expert"><img src="https://agentmods.dev/badge/skills/facturascripts/fs-claude-plugin/document-expert.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00110 | $0.00692 |
| Opus 5 | $0.00055 | $0.00346 |
| Sonnet 5 | $0.00022 | $0.00138 |
| Haiku 4.5 | $0.00011 | $0.00069 |
Grade A, and why
document-expert 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill: document-expert — Especialista en documentos de compra/venta
Esta skill conecta las tareas relacionadas con documentos de negocio del usuario con el
agente document-expert, que domina la arquitectura de documentos de FacturaScripts:
presupuestos, pedidos, albaranes y facturas, tanto de ventas como de compras.
Por qué usar el agente
El agente document-expert conoce en profundidad el sistema de documentos de FacturaScripts:
la herencia BusinessDocument/BusinessDocumentLine, el Calculator como motor central de cálculos,
los CalculatorMod para personalizar cálculos, los Mods de interfaz (SalesModInterface,
SalesLineModInterface, PurchasesModInterface) para añadir campos al formulario, la conversión
entre documentos, y la creación programática de facturas. Estos patrones son exclusivos de
FacturaScripts y no tienen equivalente en otros frameworks PHP.
Cómo invocar el agente
Usa el agente document-expert pasándole la tarea del usuario:
Agente: document-expert
Tarea: [descripción exacta de lo que necesita el usuario]
El agente:
- Consulta la documentación en
./agents/docs/(calculator, facturas-api, diagramas-de-tablas) - Analiza el código fuente del core: BusinessDocument, Calculator, SalesModInterface
- Implementa la personalización de documentos requerida
- Crea los archivos necesarios (CalculatorMod, Mods de interfaz, registro en Init.php)
Qué tareas activan esta skill
- "Añade un campo 'proyecto' a la cabecera de las facturas de venta"
- "Necesito un descuento automático por volumen en las líneas"
- "¿Cómo creo una factura programáticamente desde un plugin?"
- "Quiero personalizar el cálculo del IVA para ciertos productos"
- "¿Cómo convierto un presupuesto a pedido?"
- "Necesito añadir un campo 'centro_coste' a las líneas de factura"
- "¿Cómo funciona el Calculator de FacturaScripts?"
- "¿Cuál es la diferencia entre Mods y Extensiones para documentos?"
- "Necesito crear facturas de proveedor desde la API REST"
- "¿Cómo añado un botón en el formulario de facturas?"
- Cualquier tarea que involucre presupuestos, pedidos, albaranes o facturas
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.
- 3d ago First seen · 63 lines · 110 tokens per session scan A 7be2ace0de91
document-expert is a skill published in the GitHub repository FacturaScripts/fs-claude-plugin (8 stars, last pushed 2mo ago), licensed MIT. It adds 110 tokens to every session and 692 once invoked, about $0.0006 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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