Witness

Your AI companion for transforming chaos into order

Witness is an Obsidian plugin that turns your vault into an intelligent, AI-accessible knowledge base. It runs an MCP (Model Context Protocol) server directly inside Obsidian, allowing Claude Desktop and other AI assistants to read, write, and organize your notes on your behalf.

Philosophy: Chaos → Order

Witness is built around a simple organizational philosophy:

• Chaos: Unprocessed information flowing in from the world (articles, videos, quick notes, transcripts)

• Order: Structured knowledge you've refined and organized (topics, projects, synthesis)

The plugin helps you move information from chaos to order, with AI assistance to process, categorize, and synthesize your notes.

Related MCP server: obsidian-mcp

Features

Current (Phase 1 + 2 + 3) ✅

• MCP Server: Runs inside Obsidian, no external dependencies

• File Operations: Read, write, edit, and list files in your vault via AI

• Full-Text Search: Search across all markdown files with optional filters

• Semantic Search: Find documents by meaning using local Ollama embeddings + Orama vector store

• Search Panel: Sidebar search with path and tag filtering via fuzzy autocomplete

• Background Indexing: Automatic incremental indexing with idle-gated execution (waits for 2 minutes of inactivity), debounced saves, active file deferral, and status bar countdown timer

• Command Execution: Execute any Obsidian command via AI

• Claude Desktop Integration: Connect directly from Claude Desktop app

• Remote Access: Cloudflare Quick Tunnel or Named Tunnel (permanent URL) for access from anywhere

• Named Tunnel Support: Use your own domain with Cloudflare Named Tunnels for a permanent, stable URL

• Primary Machine: Designate which machine runs the tunnel when syncing across multiple devices

• Token Authentication: Protect your remote endpoint with a simple token

• Chaos Triage: AI-assisted processing of unread chaos items with queue management and safe frontmatter updates

• Chaos Queue Panel: Visual sidebar for browsing and triaging chaos items — card-based UI with hover actions, bulk edit mode, keyboard shortcuts, and file explorer context menu

• LLM Re-ranking: Optional two-stage search — fast hybrid results shown instantly, then re-ranked by a local LLM for higher precision

• Contextual Search: Toggle a mode where the search panel automatically shows related notes based on your cursor position, selection, or current paragraph — no typing needed

• Page Preview: Cmd+hover on any search result to preview the note without leaving the panel

• Privacy First: Everything runs locally, your tunnel, your data

16 MCP Tools Available:

• read_file - Read file contents (with optional Dataview rendering)

• write_file - Create new files (create-only, errors on existing)

• list_files - Browse directories

• edit_file - Find and replace text

• search - Unified content search: hybrid (keyword + semantic), vector, or fulltext modes with tag/path filtering

• find - Find files by name, path, tag, or frontmatter property with metadata

• move_file - Move or rename files

• copy_file - Copy files to new location

• create_folder - Create folders (with mkdir -p support)

• delete - Delete files/folders (with trash support)

• execute_command - Run Obsidian commands

• get_vault_context - Load your vault's context document (auto-renders Dataview)

• dataview_query - Execute Dataview queries, get structured vault data (requires Dataview plugin)

• get_next_chaos - Get next unprocessed chaos item for triage (single or list mode)

• mark_triage - Record triage decision (processed, deferred, acknowledged, next, reset)

• copy-obsidian-url - Copy the internal Obsidian URL for the current file

Coming Soon

• Chat Interface: Connect via WhatsApp/Telegram for mobile access

• Heartbeat Prompts: Daily/weekly prompts to keep your vault fresh

• Chaos Monitoring: Get notified when unprocessed items pile up

Installation

Prerequisites

• Obsidian 1.0.0 or higher

• Node.js 20+ (for Claude Desktop connection)

• Claude Desktop app (optional, for AI integration)

• Ollama (optional, for semantic search)

Install via BRAT (Recommended)

The easiest way to install Witness is using the BRAT plugin:

1. Install BRAT from Obsidian's Community Plugins

2. Open BRAT settings and click "Add Beta Plugin"

3. Enter: jawache/witness

4. Click "Add Plugin"

5. Enable Witness in Community Plugins

BRAT will automatically keep Witness updated when new releases are published.

Manual Installation

If you prefer to install manually:

1. Download the latest release

   • Go to Releases

   • Download main.js and manifest.json

2. Install in your vault

   # Create plugin folder
   mkdir -p /path/to/your/vault/.obsidian/plugins/witness/
   
   # Copy files
   cp main.js manifest.json /path/to/your/vault/.obsidian/plugins/witness/

3. Enable in Obsidian

   • Open Obsidian Settings → Community Plugins

   • Disable Safe Mode if prompted

   • Find "Witness" in the list and enable it

Build from Source

For developers who want to build from source:

1. Clone the repository

   git clone https://github.com/jawache/witness.git
   cd witness

2. Build the plugin

   npm install
   npm run build

3. Install in your vault

   cp main.js manifest.json /path/to/your/vault/.obsidian/plugins/witness/

Connect to Claude Desktop

1. Configure Claude Desktop

   Edit ~/.claude/claude_desktop_config.json (or %APPDATA%\Claude\claude_desktop_config.json on Windows):

   {
     "mcpServers": {
       "witness": {
         "command": "npx",
         "args": [
           "-y",
           "mcp-remote@latest",
           "http://localhost:3000/mcp",
           "--transport",
           "http-only",
           "--allow-http"
         ]
       }
     }
   }

2. Restart Claude Desktop

3. Verify Connection

   In Claude Desktop, you should see "witness" in the MCP servers list. Try asking:

   "Can you list the files in my vault?"

Usage

Organizing Your Vault

For best results, organize your vault with these top-level folders:

vault/
├── chaos/
│   ├── external/     # Articles, videos, clippings
│   └── inbox/        # Quick capture notes
└── order/
    ├── knowledge/    # Organized information
    ├── heartbeat/    # Daily/weekly notes
    ├── projects/     # Active work
    └── synthesis/    # Published output

This structure isn't required, but Witness is designed to help you maintain this flow.

Settings

Open Obsidian Settings → Witness. Settings are organised into tabs:

General Tab

• Enable MCP Server: Turn the server on/off

• Port: HTTP server port (default: 3000)

Remote Access Tab

• Enable Tunnel: Expose your MCP server via Cloudflare tunnel

• Tunnel Type: Quick (random URL) or Named (permanent URL on your domain)

• Require Authentication: Protect remote access with a token

Search Tab

• Base URL: Ollama server address (default: http://localhost:11434)

• Embedding Model: Which Ollama model to use for embeddings (see Supported Models)

• Index Status: Shows the number of indexed documents and provides Build/Clear buttons

• Minimum Content Length: Skip files shorter than this many characters (default: 50). Short files produce noisy, generic embeddings that match any query — filtering them significantly improves search quality. See Why Filter Short Documents? for details.

• Folder Exclusions: Choose folders to exclude from indexing (e.g., attachments, templates). Uses a folder picker for easy selection.

Remote Access

Witness supports two types of Cloudflare tunnels to expose your vault remotely:

Option A: Quick Tunnel (Easy, Temporary)

A quick tunnel gives you a random URL that changes every time Obsidian restarts. Good for testing.

1. Go to Obsidian Settings → Witness

2. Toggle "Enable Tunnel"

3. Set Tunnel Type to "Quick Tunnel (ephemeral)"

4. Wait for the tunnel URL to appear

5. Enable "Require Authentication" and copy your MCP URL

The URL will look like: https://random-words.trycloudflare.com/mcp?token=xxx

Option B: Named Tunnel (Permanent URL)

A named tunnel gives you a permanent URL on your own domain. Requires a free Cloudflare account.

Step 1: Create the tunnel in Cloudflare

1. Sign up at Cloudflare Zero Trust

2. Go to Networks → Tunnels

3. Click Create a tunnel

4. Choose Cloudflared as the connector type

5. Name your tunnel (e.g., "witness")

6. On the "Install connector" page, copy the tunnel token (the long eyJh... string)

7. Skip the connector installation (Witness handles this automatically)

8. Add a Public Hostname:

   • Subdomain: e.g., witness

   • Domain: select your domain (e.g., example.com)

   • Service Type: HTTP

   • URL: localhost:3456 (or whatever port you set in Witness settings)

9. Save the tunnel

Step 2: Configure Witness

1. Go to Obsidian Settings → Witness

2. Set the MCP Server Port to match your tunnel config (e.g., 3456)

3. Toggle "Enable Tunnel"

4. Set Tunnel Type to "Named Tunnel (permanent)"

5. Paste your Tunnel Token from Cloudflare

6. Set Tunnel URL to your public hostname (e.g., https://witness.example.com)

7. Enable "Require Authentication" (recommended)

8. Click "Copy URL" to get your full MCP URL

Step 3: Connect Claude

Use the tunnel URL in your MCP client configuration:

{
  "mcpServers": {
    "witness": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote@latest",
        "https://witness.example.com/mcp?token=YOUR_TOKEN",
        "--transport",
        "http-only"
      ]
    }
  }
}

This works with Claude Desktop, Claude.ai web, and Claude mobile.

Multiple Devices (Obsidian Sync)

If you sync your vault across multiple computers using Obsidian Sync, the Witness plugin settings sync too — including the tunnel token. Without precaution, every machine would try to start the tunnel, and Cloudflare would round-robin traffic between them unpredictably.

To prevent this, Witness has a Primary Machine feature:

1. Open Obsidian Settings → Witness on the machine you want to run the tunnel

2. Under Named Tunnel settings, click "Set as primary"

3. This saves the machine's hostname — only this machine will start the tunnel

4. On other machines, the tunnel is silently skipped on startup

To switch the primary to a different machine, open Witness settings on that machine and click "Set as primary". To clear the restriction entirely, click the ✕ button next to the primary hostname.

Mobile Devices

The tunnel and MCP server features are desktop-only. Obsidian mobile (iOS/Android) cannot run the HTTP server or cloudflared binary. To access your vault from a mobile device, connect to the tunnel URL from a client app (e.g., Claude mobile) — the vault is served by whichever desktop machine is running the tunnel.

Security Notes

• The auth token is included in the URL query parameter. HTTPS encrypts this in transit, but be cautious about sharing URLs or logging them.

• For additional security, the token can also be passed via Authorization: Bearer xxx header instead of the query parameter.

• The cloudflared binary is automatically downloaded and stored in ~/.witness/bin/.

Semantic Search

Witness provides semantic search powered by Ollama for local embeddings and Orama for the vector store. Everything runs locally — no cloud services, no API keys.

Prerequisites

1. Install Ollama: Download from ollama.com

2. Pull an embedding model:

   ollama pull nomic-embed-text    # Good default (768 dims, 2048 token context)
   ollama pull mxbai-embed-large   # Higher quality (1024 dims, 512 token context)

   You can also pull models from the Witness settings page directly.

3. Build the index: Open Witness settings → Search tab → click "Build Index"

Search Modes

The search MCP tool (and the Search panel) supports three modes:

• Hybrid (default): Combines QPS keyword matching with vector cosine similarity. Best for most queries — gets the precision of keywords with the recall of semantic understanding.

• Vector: Pure semantic similarity. Finds conceptually related documents even when they don't share keywords. Good for exploratory queries like "notes about improving sleep quality".

• Fulltext: Pure QPS (Quantum Proximity Scoring) keyword matching. Fast and precise when you know the exact terms. No embeddings needed. Scores by token proximity — "carbon intensity" as adjacent words ranks higher than scattered occurrences.

Supported Embedding Models

Task prefixes are special strings prepended to input text that tell the model whether it's processing a document for storage or a query for search. Witness handles this automatically via embedDocuments() and embedQuery() — you don't need to add prefixes manually. Using the wrong prefix (or no prefix when one is required) produces embeddings in the wrong vector space, making similarity scores meaningless.

Context Length and Truncation

Each embedding model has a maximum context window measured in tokens. Documents longer than this are truncated before embedding. Witness handles this automatically:

1. Dynamic resolution: On startup, Witness queries Ollama's /api/show endpoint to get the model's actual architecture context length

2. Client-side pre-truncation: As a safety net, text is truncated to context_tokens × 2 characters before sending to Ollama (the factor of 2 is a conservative chars-per-token estimate)

3. Server-side truncation: Ollama's truncate: true parameter provides a second safety net

Important: The context length that matters is the model's architecture context length (e.g., nomic-bert.context_length: 2048), not the Modelfile num_ctx parameter (which may be 8192 but doesn't extend the embedding context). This distinction caught us out — nomic-embed-text reports num_ctx 8192 but can only embed 2048 tokens.

Documents with heavy JSON, HTML, URLs, or non-ASCII content tokenise less efficiently (as low as ~1.5 characters per token vs the typical ~4 for English prose). The conservative CHARS_PER_TOKEN = 2 accounts for this.

Why Filter Short Documents?

Very short documents (e.g., a file containing just a single word like "gold") produce generic embeddings that sit near the centre of the vector space. Because they lack distinctive content, they end up equidistant from everything — and cosine similarity scores them surprisingly high against any query.

The Minimum Content Length setting (default: 50 characters) filters these out at indexing time. This is the single most effective setting for improving search quality without changing your embedding model.

Signs you might want to increase this threshold:

• Search results include stub pages, empty templates, or placeholder files

• The same short documents appear in results for unrelated queries

• Vector search returns noticeably worse results than fulltext

Index Persistence

The index is stored at .witness/index.orama in your vault as a single JSON file. It includes a schema version number — when the schema changes (e.g., when new fields are added), old indexes are automatically discarded and a full re-index is triggered on next use.

To force a complete re-index: Settings → Search → Clear Index → Build Index.

Example Commands

Once connected to Claude Desktop, you can ask:

• "Show me all the files in my chaos/inbox folder"

• "Read the contents of my daily note"

• "Create a new note in order/knowledge about [topic]"

• "List all markdown files in my vault"

Development

Building

npm run build          # Production build
npm run dev            # Development mode with watch

Testing

# Build and install plugin in test vault
npm run test:install-plugin

# Start Obsidian with test vault
npm run test:start-obsidian

# Run integration tests (47 tests)
npm test

# Check server status
curl http://localhost:3000/health

Logs

MCP server logs are written to your vault's plugin folder:

.obsidian/plugins/witness/logs/mcp-YYYY-MM-DD.log

This makes it easy to:

• Share logs for bug reports

• Debug issues without Developer Console

• Let AI assistants read logs directly

Additional log locations:

• Obsidian console: Cmd+Option+I → Console tab

• Claude Desktop: ~/Library/Logs/Claude/mcp-server-witness.log

Troubleshooting

Plugin won't load

1. Check Obsidian console for errors

2. Verify files are in correct location: .obsidian/plugins/witness/

3. Try disabling and re-enabling the plugin

Claude Desktop won't connect

1. Check the MCP server is running:

   curl http://localhost:3000/health
   # Should return: {"status":"ok","plugin":"witness"}

2. Check Claude Desktop logs:

   tail -f ~/Library/Logs/Claude/mcp-server-witness.log

3. Verify Node.js version:

   node --version  # Should be 20.x or higher

MCP server drops connection (macOS sleep)

If the MCP server becomes unreachable after periods of inactivity, your Mac is likely sleeping and dropping network connections. Check your current power settings:

pmset -g

The key setting is networkoversleep — if it's 0, macOS drops all network connections during sleep, killing the MCP server for remote clients.

Fix: Enable network access during sleep

sudo pmset -a networkoversleep 1

Other useful power settings for keeping the server reachable:

# Prevent system sleep on AC power
sudo pmset -c sleep 0

# Enable Wake on LAN (allows remote wake)
sudo pmset -c womp 1

# Disable Power Nap (can interfere with network stability)
sudo pmset -c powernap 0

Quick fix: Keep awake temporarily

If you don't want to change system settings permanently, run caffeinate in a terminal:

# Prevent idle and system sleep (Ctrl+C to stop)
caffeinate -si

# Or run in the background
caffeinate -si &

Key pmset settings

Port already in use

If port 3000 is taken:

1. Open Obsidian Settings → Witness

2. Change the port number (e.g., 3001)

3. Update your Claude Desktop config to match

Architecture

Witness runs an HTTP server inside Obsidian's Electron process:

Claude Desktop (MCP Client)
    ↓ stdio
mcp-remote bridge
    ↓ HTTP + SSE
Witness Plugin (MCP Server)
    ↓ Direct API
Obsidian Vault

This is different from other Obsidian MCP servers that run externally and connect via REST APIs. Witness has direct access to Obsidian's internal APIs for maximum reliability and performance.

Roadmap

Phase 1: MCP Server ✅

• Basic plugin scaffold

• HTTP server implementation

• File operations (read, write, list, edit)

• Claude Desktop integration

• Full-text search

• Command execution

• Orientation document system

• File-based logging

• Integration test suite (47 tests)

Phase 2: Remote Access ✅

• Cloudflare Quick Tunnel integration

• Cloudflare Named Tunnel support (permanent URLs)

• Primary machine designation for multi-device sync

• Token authentication for remote access

• WhatsApp/Telegram bot

• Multi-user sessions

Phase 3: Semantic Search ✅

• Local embeddings via Ollama (nomic-embed-text, mxbai-embed-large, and more)

• Orama vector store with hybrid (BM25 + vector), vector-only, and fulltext modes

• Model-specific task prefixes for optimal retrieval quality

• Dynamic model info resolution via Ollama /api/show

• Client-side pre-truncation for context length safety

• Minimum content length filter for short document noise

• Folder exclusions with folder picker UI

• Search panel sidebar view

• Tabbed settings UI with model pull and live indexing progress

• Tested on 4,097-document vault

Dataview Integration ✅

• dataview_query MCP tool (markdown + JSON output)

• read_file render parameter for resolving Dataview codeblocks

• get_vault_context auto-renders Dataview queries

• 8 integration tests

Chaos Triage ✅

• get_next_chaos tool (single + list mode, queue counts, priority sorting)

• mark_triage tool (processed, deferred, acknowledged, next, reset)

• Safe frontmatter updates via processFrontMatter API

• AI guardrails: create-only write_file, improved edit_file errors

Chaos Queue Panel ✅

• Visual sidebar with card-based UI (title, path, smart snippets)

• "Next Up" and "Queue" groups with collapsible sections

• Hover-only action buttons (acknowledge, mark next, move to death, reset)

• Bulk Edit mode with select all, bulk acknowledge, bulk move-to-death

• 10 keyboard commands (triage actions, sibling navigation, panel toggles)

• Inline hotkey capture in settings with conflict detection

• File explorer context menu for chaos files and folders

• Post-action navigation (next sibling file after move-to-death)

• Live vault event listeners (deleted/renamed files removed from panel)

Phase 4: Intelligence

• Heartbeat scheduler (daily/weekly prompts)

• Chaos monitoring (detect stale items)

• Smart suggestions

• Auto-categorization

Phase 5: Advanced Features

• Graph analysis

• Template system

• Workflow automation

Contributing

Contributions are welcome! This project is in active early development.

Guidelines

• Keep it simple and focused

• Maintain zero dependencies on other plugins

• Test with the included test-vault/

• Follow the existing code style

License

MIT

Acknowledgments

• Built on the Model Context Protocol by Anthropic

• Inspired by the Zettelkasten and PARA methods

• Thanks to the Obsidian community for the amazing platform

Support

• Issues: GitHub Issues

• Discussions: GitHub Discussions

• Twitter: @jawache

"The best way to predict the future is to invent it." - Alan Kay