Claude Writer

AI writing assistant for Obsidian, powered by Claude Code CLI.

Transform your notes with Claude's intelligence — directly inside Obsidian's sidebar.

Features

Writing Commands

Command	Description
Rewrite	Polish grammar and style while preserving meaning
Restructure	Convert messy notes/keywords into structured documents
Summarize	Extract key points as bullet points
KR→EN	Korean to natural English translation
EN→KR	English to natural Korean translation
Formalize EN	Convert Korean tech docs to formal English reports
Insight	Extract one core insight (Zettelkasten style)
Explain	Deep explanation at 4 levels (elementary → expert)
Visualize	AI-recommended Mermaid diagrams & tables
Custom	Free-form instructions

Smart Context

• Template-aware: Detects frontmatter template: field and auto-applies matching prompts (11 templates)
• Document context: Scans [[wikilinks]] up to 3 levels deep for richer AI understanding
• Surrounding text: Sends text before/after selection so results fit naturally in your document

Flexible Insert Options

Every result can be inserted in 6 ways:

• Replace — swap selected text
• Below — insert right after selection
• Callout — foldable > [!info]- block
• New Note — create linked note with [[wikilink]]
• End of Doc — append to document
• Copy — clipboard

Explain Mode (4 Levels)

Level	Audience	Style
1	Elementary	Analogies, simple words
2	High School	Concepts → principles → examples
3	General	Background → mechanism → relationships
4	Expert	Technical depth, trade-offs, English terminology

Visualize Mode

1. Select text → click Visualize
2. AI analyzes content and recommends 3 visualization techniques
3. Pick one → generates Obsidian-ready Mermaid diagram or Markdown table

Supports: flowchart, mindmap, sequence, timeline, pie, gantt, ER, state, class, quadrant, table.

Requirements

• Claude Code CLI must be installed and authenticated
  • Install: npm install -g @anthropic-ai/claude-code
  • Login: claude auth login
• Obsidian v1.5.0+
• Desktop only (uses local CLI process)

Installation

From Community Plugins

1. Open Obsidian Settings → Community Plugins
2. Search for "Claude Writer"
3. Install and enable

Manual

1. Download main.js, styles.css, manifest.json from Releases
2. Create folder: <vault>/.obsidian/plugins/claude-writer/
3. Copy the 3 files into the folder
4. Restart Obsidian and enable the plugin

Usage

1. Select text in any note
2. Click the ✏️ pen icon in the ribbon (or use the sidebar)
3. Choose a command
4. Review the result → pick how to insert it

Right-Click Menu

Select text → right-click → Claude: Rewrite / Restructure / Summarize / Translate / Formalize

Keyboard

All commands are available via Obsidian's command palette (Ctrl/Cmd + P).

Settings

Setting	Description
Claude CLI Path	Auto-detected, or set manually
Default Model	Haiku (fast) / Sonnet (balanced) / Opus (best)
Default Tone	Auto / Formal / Technical / Content / Analytical
Character Limit	0 = unlimited

How It Works

Claude Writer bridges Obsidian and Claude Code CLI using child_process.spawn. Your text is processed locally through the CLI — no API keys needed, uses your existing Claude subscription (Max/Team/Enterprise).

No data leaves your machine except to Anthropic's API through the official CLI.

License

MIT

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Built by jasonmoon — Full-stack developer, AI-native tools & creative automation.