Uploaded August 2025 | Updated September 2026, 5 days ago

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Graph Toolkit is Unity’s new experimental framework for building custom graph-based editors — and in this video, I put it to the test by building a working state machine, from editor nodes to runtime execution. The toolkit doesn’t come with a built-in execution layer, so we walk through how to design your own node types, define execution flow using ports, and serialize the graph into a lightweight runtime format that drives real in-game logic. If you’ve been wondering what Graph Toolkit can actually do — or whether it’s worth your time — this is a grounded, end-to-end look at what it takes to build something functional with it.

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GTK Feature Overview - youtube.com/watch?v=A7WXmbkIVRo
GTK API Docs - docs.unity3d.com/Packages/com.unity.graphtoolkit@0.2/manual/index.html

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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬

0:00 Setup
2:50 Editor Nodes and Graph
8:25 Transition Nodes
11:12 Runtime Nodes and Executors
13:48 Asset Importer
19:20 Runtime Director

*Source code:* github.com/adammyhre/GraphToolkitStateMachine

More Useful Code:
github.com/adammyhre?tab=repositories
Unity Utility Library: github.com/adammyhre/Unity-Utils
Lock Inspector Hotkey: gist.github.com/adammyhre/4754f731a93bf1cab0d1385ccfa23642

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