hashmark

Run multiple Claude Code agents in parallel from a single UI.

The current state of the art for multi-agent work is tmux — a terminal split into rectangles, each showing a different agent's output. Hashmark is the orchestration layer on top of what already works.

Status: beta — Mac only

What it does

• Start 2+ Claude Code sessions on different tasks or directories simultaneously
• Watch tool calls stream in real-time with inline approve/deny
• Sessions persist across restarts
• OAuth-native — if you have Claude Max, you're already authenticated. No API key setup.

Prerequisites

• macOS 13+
• Claude Code CLI installed and authenticated (claude in your PATH)
• Node 20+
• Rust + Cargo (install)

Run in development

git clone https://github.com/jpoindexter/hashmark.git
cd hashmark/app
npm install
npm run tauri dev

The app opens as a native macOS window. Vite serves the frontend at localhost:5173.

Build a DMG

cd app
npm run tauri build

Output: app/src-tauri/target/release/bundle/dmg/hashmark_*.dmg

Stack

How it works

Each session spawns a Claude Code process via Tauri's Rust backend. The process streams JSON tool-call events back to the UI over a Tauri event channel. The frontend renders them as flat approval rows — you see what each agent is doing and can allow or deny tool calls inline. All sessions and messages are persisted in a local SQLite database.

API keys are stored in Tauri's secure OS keychain, never in source or config files.

Project layout

app/
  src/                    Svelte 5 frontend
    routes/+page.svelte   shell layout (titlebar, tab bar, sidebar)
    components/           ChatPane, Compose, Sidebar, Welcome, Settings, ...
    lib/                  store, api, types
  src-tauri/src/          Rust backend
    commands.rs           Tauri command handlers
    harness.rs            agent runner + streaming
    db.rs                 SQLite schema + queries
    sessions.rs           session management
  static/                 fonts (Roboto, Hack), icons

Key commands

npm run tauri dev        # dev mode (hot reload)
npm run tauri build      # production DMG
npm run check            # Svelte + TypeScript typecheck

Roadmap

• Multi-session parallel agents
• Real-time tool call streaming
• Inline approve/deny
• Session persistence
• OAuth-native auth (Claude Max)
• Per-session cost/token tracking
• Workflow chains (agent A hands off to agent B)
• Session checkpoints + branching
• Multi-provider (OpenAI, Gemini, Ollama)

License

MIT