Obsidian

A single skill for everything Obsidian: the CLI, Bases (.base files), and Obsidian Flavored Markdown. Consolidates the former obsidian-cli, obsidian-bases, and obsidian-markdown skills.

Origin: derived from kepano/obsidian-skills (MIT). Obsidian must be running for any CLI or MCP command to work.

When to Use

• Interact with a vault from the command line (create/read/search/manage notes, tasks, properties).

• Build or edit a Base (database-like view over notes) with filters and formulas.

• Author Obsidian Flavored Markdown (wikilinks, embeds, callouts, properties).

• Develop or debug an Obsidian plugin or theme.

• User asks or mentions this skill in English (e.g., "use /obsidian", "run obsidian").

• O usuário pede ou menciona esta skill em português (ex.: "use /obsidian", "execute obsidian").

When NOT to Use

• Do not use for generic Markdown files or note-taking tools that are not Obsidian.
• Do not target a vault the user has not explicitly named.
• Do not auto-install the mcp-obsidian-cli package or run the obsidian binary without user confirmation.

Security & Guardrails

• Human confirmation first: confirm the target vault and any obsidian command with the user before execution.
• No auto-execution: only run commands that read or modify the named vault; do not run system-wide commands or execute arbitrary plugins/themes without explicit consent.
• MCP fallback is opt-in: if the obsidian CLI is missing, present mcp-obsidian-cli as an optional fallback and wait for the user to approve its installation.
• Stay inside the vault: do not use Obsidian CLI to access files outside the vault root.

Three areas

1. CLI

Run obsidian against a running Obsidian instance — vault operations, plugin/theme dev, DOM/screenshot inspection. See the full command reference and quick-start examples in references/obsidian-cli.md.

Before running any obsidian command, verify which vault the user wants to target and confirm the command. Do not auto-install mcp-obsidian-cli or any Obsidian plugin without explicit user consent.

2. Bases

.base files are valid YAML defining filters, formulas, and views (table/cards/list/map) over notes. See references/obsidian-bases.md and the full function list in references/FUNCTIONS_REFERENCE.md.

filters:
  and:
    - file.hasTag("task")
    - 'file.ext == "md"'
formulas:
  days_until_due: 'if(due, (date(due) - today()).days, "")'
views:
  - type: table
    name: "Active Tasks"
    order: [file.name, status, formula.days_until_due]

3. Markdown (Obsidian Flavored)

Wikilinks [[Note]], embeds ![[note.png|300]], callouts > [!warning], properties/frontmatter, highlights ==text==, Mermaid, math. See references/obsidian-markdown.md, plus references/CALLOUTS.md, references/EMBEDS.md, references/PROPERTIES.md.

Workflows

Create an Obsidian note

1. Add frontmatter/properties at the top (see references/PROPERTIES.md).
2. Write content with standard Markdown + Obsidian syntax (wikilinks, embeds, callouts).
3. Verify it renders in reading view.

Build a Base

1. Create a .base file with valid YAML.
2. Define filters (global/view) and optional formulas.
3. Add one or more views (table/cards/list/map).
4. Validate YAML (watch quoting rules); open in Obsidian to confirm rendering.

Register CLI / develop a plugin

1. Guide the user to Settings → General → Command line interface → Register CLI; restart the terminal.
2. After the user confirms code changes, run obsidian plugin:reload and obsidian dev:screenshot only for the explicitly named plugin.

Common Mistakes

Mistake	Symptom	Fix
Obsidian not running	CLI/MCP commands fail	Open the Obsidian app first
Unquoted special chars in .base	YAML error	Quote strings with :, {, }, [, ], ,, &, *, #, ?, |, -, <, >, =, !, %, @
Double quotes inside double quotes (formula)	Parse error	Wrap formula in single quotes: 'if(done, "Yes", "No")'
Duration without field access	(now()-file.ctime).round(0) errors	Access .days first: (now()-file.ctime).days.round(0)
Missing null checks in formulas	Crash on empty property	Guard with if(): if(due, (date(due)-today()).days, "")
Wikilink vs Markdown link	Broken external links	[[Note]] for vault notes; [text](url) for external only

References

• references/obsidian-cli.md — CLI install, syntax, commands, plugin dev.
• references/obsidian-bases.md — Bases schema, filters, formulas, views, examples.
• references/obsidian-markdown.md — Obsidian Flavored Markdown syntax.
• references/FUNCTIONS_REFERENCE.md — Complete Bases function reference.
• references/CALLOUTS.md — All callout types.
• references/EMBEDS.md — All embed types.
• references/PROPERTIES.md — All property types and tag rules.