A guide for working with Obsidian, an app that stores linked Markdown notes in a local folder called a vault. It covers vault files, plugins, note automation, and connections to other tools.

Use it to build Obsidian plugins, automate notes through its URI links, extend Markdown, query notes, and use the Local REST API to exchange data with other tools.

It removes the guesswork from changing Obsidian notes, plugins, and settings or connecting Obsidian to scripts and services.

obsidian — Skill for Claude Code and Codex by julianobarbosa

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 julianobarbosa/claude-code-skills --skill obsidian

Clone the repo

git clone --depth 1 https://github.com/julianobarbosa/claude-code-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/obsidian/github.svg)](https://agentmods.dev/skills/julianobarbosa/claude-code-skills/obsidian)

Your own site

<a href="https://agentmods.dev/skills/julianobarbosa/claude-code-skills/obsidian"><img src="https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/obsidian/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/skills/julianobarbosa/claude-code-skills/obsidian"><img src="https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/obsidian.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,577 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. 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: 2 findings, up to high

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 →

high Tool Misuse · line 233
Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).

Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
medium Tool Misuse · line 263
Tool defaults are unsafe or overly permissive (e.g. disabled TLS verification, no authentication, world-writable permissions). Unsafe defaults widen the attack surface.

Fix: Override unsafe defaults with secure settings (verify=True, auth required, restrictive permissions). Review and harden all tool configurations.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00060	$0.03577
Opus 5	$0.00030	$0.01788
Sonnet 5	$0.00012	$0.00715
Haiku 4.5	$0.00006	$0.00358

Measured 7d ago against content hash 971e3976c1c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

obsidian scanned grade A with 1 finding 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 7d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (References/master-tools/BaseBuilder.py, References/master-tools/NoteCreator.py, References/master-tools/SearchVault.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -H "Authorization: Bearer YOUR_API_KEY" \

skills/obsidian/SKILL.md · 544 lines

How it starts

The opening of the file, as written. The whole thing — 544 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Obsidian

Overview

This skill provides comprehensive guidance for working with Obsidian, a powerful knowledge management and note-taking application. It covers vault structure, the Obsidian API for plugin development, URI scheme automation, markdown extensions, and integration with external tools via the Local REST API.

Quick Reference

Vault Structure

my-vault/
├── .obsidian/              # Configuration folder
│   ├── app.json            # App settings
│   ├── appearance.json     # Theme settings
│   ├── community-plugins.json  # Installed plugins list
│   ├── core-plugins.json   # Core plugin toggles
│   ├── hotkeys.json        # Custom keybindings
│   ├── plugins/            # Plugin data folders
│   │   └── <plugin-id>/
│   │       ├── main.js     # Compiled plugin code
│   │       ├── manifest.json
│   │       └── data.json   # Plugin settings
│   └── workspace.json      # Layout state
├── Notes/                  # User notes (any structure)
├── Attachments/            # Images, PDFs, etc.
└── Templates/              # Template files

Obsidian URI Scheme

Native Obsidian supports obsidian:// protocol for automation:

# Open a vault
obsidian://open?vault=MyVault

# Open a specific file
obsidian://open?vault=MyVault&file=Notes/MyNote

# Create a new note
obsidian://new?vault=MyVault&name=NewNote&content=Hello

# Search the vault
obsidian://search?vault=MyVault&query=keyword

# Open daily note
obsidian://daily?vault=MyVault

URI Parameters

Parameter	Description
`vault`	Vault name (required)
`file`	File path without `.md` extension
`path`	Full file path including folders
`name`	Note name for creation
`content`	Content to insert
`query`	Search query
`heading`	Navigate to heading
`block`	Navigate to block reference

Workflow Decision Tree

What do you need to do?
├── Automate Obsidian from external tools?
│   ├── Simple open/create operations?
│   │   └── Use: Native obsidian:// URI scheme
│   ├── Complex automation (append, prepend, commands)?
│   │   └── Use: Advanced URI plugin
│   └── Full programmatic access?
│       └── Use: Local REST API plugin
├── Build a plugin for Obsidian?
│   └── See: Plugin Development section
├── Work with vault files directly?
│   └── Use: obsidian-cli or direct file operations
├── Extend markdown syntax?
│   └── See: Markdown Extensions section
└── Query notes and metadata?
    └── Use: Local REST API or Dataview plugin

Read the full file on GitHub · 544 lines

Files

What ships with it

26 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.

7d ago First seen · 544 lines · 60 tokens per session scan A 971e3976c1c6

Subscribe to this mod's changes

obsidian is a skill published in the GitHub repository julianobarbosa/claude-code-skills (10 stars, last pushed 15d ago), licensed MIT. It adds 60 tokens to every session and 3,577 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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