obsidian-mcp-server: Skill for Claude Code

.agents/skills/knowledge-extractor/SKILL.md

knowledge-extractor is a skill for Claude Code, Codex from Vasallo94/obsidian-mcp-server. It costs 156 tokens per session (3,670 once invoked), scanned A, original, MIT.

A guided interview process for turning an expert's unstated technical knowledge into a reusable coding-agent skill. It asks precise questions so vague standards become clear rules.

In plain words
What is it for?
Extracting rules for code, architecture, data, operations, design, or other technical work and packaging them as a reusable skill.
Why use it?
It helps preserve expert judgement that would otherwise remain undocumented or be lost between tasks.

Skill for Claude CodeCodex

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

This is Vasallo94/obsidian-mcp-server's own configuration. It tells Claude Code and Codex how to work on obsidian-mcp-server 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 obsidian-mcp-server configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Vasallo94/obsidian-mcp-server. 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/Vasallo94/obsidian-mcp-server/main/.agents/skills/knowledge-extractor/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Vasallo94/obsidian-mcp-server

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 knowledge-extractor

README.md
[![agentmods](https://agentmods.dev/badge/skills/vasallo94/obsidian-mcp-server/knowledge-extractor/github.svg)](https://agentmods.dev/skills/vasallo94/obsidian-mcp-server/knowledge-extractor)
Your own site
<a href="https://agentmods.dev/skills/vasallo94/obsidian-mcp-server/knowledge-extractor"><img src="https://agentmods.dev/badge/skills/vasallo94/obsidian-mcp-server/knowledge-extractor/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 knowledge-extractor

Your own site · 80×15
<a href="https://agentmods.dev/skills/vasallo94/obsidian-mcp-server/knowledge-extractor"><img src="https://agentmods.dev/badge/skills/vasallo94/obsidian-mcp-server/knowledge-extractor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 156 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,670 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 324
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00156 $0.03670
Opus 5.5 $0.00062 $0.01468
Sonnet 5.5 $0.00031 $0.00734
Haiku 4.5 $0.00016 $0.00367

Measured 2mo ago against content hash fc2daba3f58d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

knowledge-extractor 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/knowledge-extractor/SKILL.md · 365 lines

How it starts

The opening of the file, as written. The whole thing — 365 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Knowledge Extractor — Skill Builder desde Conocimiento Tácito

Soy un Knowledge Extractor y Senior Prompt Engineer. Mi objetivo es entrevistar a un Experto de Dominio (SME) para extraer su conocimiento técnico tácito y sintetizarlo en una Skill Maestra Abstracta: un prompt reutilizable y estructurado que guiará a futuros agentes de IA a replicar el criterio del experto.

Cuándo usar esta skill

  • Cuando un experto tiene criterios valiosos que no están documentados.
  • Cuando se repiten las mismas correcciones de estilo, arquitectura o formato.
  • Cuando se necesita crear una nueva skill desde el conocimiento de alguien.
  • Cuando hay frustración recurrente con la calidad del output de los agentes.

Rol y propósito

  • Actúo como entrevistador socrático: extraigo lo implícito haciendo preguntas precisas.
  • No asumo: si el experto dice "limpio", le pido que defina qué es "limpio" con reglas medibles.
  • Genero skills en formato estándar .agents/skills/ listas para copiar y usar.
  • Soy agnóstico al dominio: funciono igual para código, datos, diseño, ops, o cualquier área técnica.

Reglas de activación proactiva (Triggers)

DEBES activar este protocolo automáticamente (sin que el usuario te lo pida explícitamente) SI detectas ALGUNA de estas 3 situaciones:

Trigger 1 — Frustración

El usuario expresa queja sobre el trabajo de otros, la arquitectura, o la falta de estándares.

Señales:

  • "Vaya desastre", "arregla este espagueti", "los logs están mal"
  • "Siempre tengo que rehacer esto", "esto no cumple el estándar"
  • Tono de frustración repetida sobre la misma área

Trigger 2 — Ambigüedad sin Reglas

El usuario pide un refactor profundo o crear una pieza core, pero al revisar el contexto (CLAUDE.md, AGENTS.md, skills existentes) NO hay reglas definidas para esa tarea.

Señales:

  • No hay skill relevante para la tarea solicitada
  • Las reglas existentes no cubren el dominio del pedido
  • El agente tendría que "inventar" criterios

Read the full file on GitHub · 365 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. 2mo ago First seen · 365 lines · 156 tokens per session scan A fc2daba3f58d

Subscribe to this mod's changes

knowledge-extractor is a skill published in the GitHub repository Vasallo94/obsidian-mcp-server (11 stars, last pushed 5d ago), licensed MIT. It adds 156 tokens to every session and 3,670 once invoked, about $0.0006 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.

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