Flowbench

A visual workbench for designing, running, and evolving agentic workflows on top of Claude Code.

Status: 0.1.0-mvp — feature-complete for the initial scope, not production software. No code signing, no auto-update, no real-world stress testing.

What it does

• Drag/drop visual canvas for chaining prompts, skills, sub-agents, and assessment branches
• Auto-discovers your installed skills from ~/.claude/skills/ and ~/.claude/commands/
• Per-node modal editing with draft state
• Branching edges (sequential / on-success / on-failure / conditional) with inline branch picker
• Pre-flight modal lets you pick the orchestrator model and override per-node models for one run
• Orchestrator does a plan-pass before each run, producing a Context Plan visible in its own tab
• Frontier-based parallel run loop honors edge kinds and Assessment branch outcomes
• Per-node status pulses on the canvas and a Results page with per-node cards
• Output nodes that materialize Markdown / Word / PowerPoint / Figma / JSON files at the end of a run
• Native Sign in / Sign out via the Claude OAuth web flow — no terminal required, no credentials stored

Requirements

• macOS (Apple Silicon or Intel — universal binary)
• Claude Code CLI installed locally
• A Claude Max subscription (Flowbench piggybacks on the system claude install — no separate billing)

Install

1. Download the latest .dmg from the Releases page
2. Open it and drag Flowbench.app to Applications
3. First launch: right-click the app → Open → Open (one-time Gatekeeper bypass since the build is unsigned)
4. The status pill in the top bar tells you whether claude is found and signed in. Click it to sign in.

Build from source

git clone https://github.com/boomerfreak1/flowbench.git
cd flowbench
npm install
npm run tauri dev                                       # development
npm run tauri build                                     # production app for current arch
npm run tauri build -- --target universal-apple-darwin  # universal

Requires Rust (rustup), Node ≥18, and Xcode Command Line Tools.

Stack

• Tauri 2 — Rust core + WebView UI
• React 19 + React Flow — canvas
• xterm.js — live terminal pane
• Charcoal — design system (light minimal, Inter + JetBrains Mono)

License

MIT