Symphony: see your Go code as a graph

Symphony: see your Go code as a graph is a desktop app that renders Go code as interactive graphs of boxes and wires that you can navigate, edit, and execute.

Symphony is a desktop application that turns Go functions into visual graphs of boxes connected by wires. Moving a wire or editing a node updates the underlying .go file directly, keeping the picture and file synchronized. Users can execute programs to watch execution paths light up on pins, trace crashes, and run tests displayed as graphs. Symphony works with Go and goer, an included language that adds actors to Go, and connects with AI assistants like Claude, Codex, and opencode through MCP. It is built for developers working on Linux and Windows platforms.

Symphony: see your Go code as a graph at a glance

Best for: Software engineer
Runs on: Linux, Windows, open source
Pricing: Free under the MIT licence
Released: October 2026
Category: AI coding tool
Website: symphony.q3k.app

Key features

Turn Go functions into editable graphs that write back to files
Watch code execution paths light up live with pin values
Inspect crashes on failed nodes and configure conditional breakpoints
Run tests displayed as graphs with visual coverage smoke
Explore codebases using call graphs, main paths, and package world maps
Visualize actor message passing using the goer language
Collaborate with AI assistants like Claude, Codex, and opencode via MCP
Learn Go with built-in interactive lessons, quests, and debugging challenges

Use it for

Trace and debug execution paths and branch outcomes in Go codebases
Build and edit Go programs visually without typing raw Go syntax
Watch AI assistants assemble functions, run tests, and manage git commits
Inspect message passing between actors in goer applications

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