/open - Open in Obsidian

Opens a vault note in Obsidian directly from Claude Code.

Usage

/open <note name>             # Open by name (fuzzy match)
/open daily                   # Open today's daily note
/open Concept - CAMO          # Open a specific note
/open Meeting - 2026-02-11    # Open by partial name

Instructions

1. Resolve the Note

Determine what the user wants to open:

• "daily" or "today" — resolve to Daily/YYYY/YYYY-MM-DD using today's date
• Exact filename — use as provided
• Partial name — use Glob to find the matching file:

# Find by partial name

Use the Glob tool with pattern **/*<name>*.md to find the file. If multiple matches, pick the most likely one or ask the user.

2. Build the URI Path

Convert the file path to a URI-encoded relative path (from vault root):

• Strip the vault root prefix
• Strip the .md extension
• URL-encode spaces as %20
• URL-encode forward slashes as %2F

Examples:

• Daily/2026/2026-02-11.md → Daily%2F2026%2F2026-02-11
• Concept - Context Engineering.md → Concept%20-%20Context%20Engineering
• Meetings/2026/Meeting - 2026-02-11 Stand Up.md → Meetings%2F2026%2FMeeting%20-%202026-02-11%20Stand%20Up

3. Open in Obsidian

Run this command with dangerouslyDisableSandbox: true (required for inter-process communication):

open "obsidian://open?vault=BA-DavidOliver-ObsidianVault&file=<encoded_path>"

The sandbox must be disabled — the open command needs macOS Launch Services to activate Obsidian, which is blocked in sandbox mode.

4. Confirm

Tell the user which note was opened. If Obsidian is not running, the error will mention procNotFound — tell the user to start Obsidian first.

Special Cases

Input	Resolves To
daily / today	Daily/YYYY/YYYY-MM-DD (today's date)
yesterday	Daily/YYYY/YYYY-MM-DD (yesterday's date)
A person's name	People/<Name>.md
A type prefix (e.g. ADR - )	Search in the appropriate folder

Troubleshooting

"procNotFound" error → Obsidian is not running. Ask the user to start it.

"operation not permitted" error → Sandbox was not disabled. Ensure dangerouslyDisableSandbox: true is set on the Bash call.

Wrong note opened → Multiple files matched. Use a more specific name or provide the full path.