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Start with the measured compatibility contract

Summer Engine uses familiar text scene, resource, script, and project formats. The current upstream technical base is 4.6.1, the planned next base is 4.7.1, and Summer follows upstream continuously. The minimum and recommended project compatibility ranges are not yet measured, so this page does not promise that every historical project opens unchanged.

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What to evaluate

Portable source formats. .tscn scenes, .gd scripts, .tres resources, and project.godot configuration use familiar upstream-derived formats. This is a format fact, not proof that every file produced by every upstream release loads unchanged. Commit before the first open, then review import and configuration changes normally. Third-party libraries and plugins. Pure GDScript addons are the safest case. Native extensions, custom editor integrations, and addons pinned to a different upstream version need explicit compatibility testing. Export targets. Verify the installed templates and run an exported-build smoke test for each target. Do not infer web, desktop, mobile, or native-extension compatibility from the upstream base alone. Team workflows. Mixed-editor teams can share the repository when they pin compatible versions and review generated changes. Shared formats reduce friction; they do not guarantee zero differences between editors or importers.

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What Happens When You Open Your Project

  1. File → Open Project (or Project Manager) → browse to your project folder → select project.godot
  2. Summer Engine automatically indexes your project (30 seconds to 2 minutes depending on size)
  3. The AI learns your scenes, scripts, assets, and relationships
  4. You start chatting. Describe what you want to change; Summer Engine applies it

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Zero Lock-in

Your Summer game remains yours: GDScript, text scenes, resources, and assets stay in documented formats. Opening them in another compatible editor may require an import pass and does not carry Summer-only AI or platform surfaces.

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Version Compatibility

Use the generated Compatibility & upstream page for the current base and measured claims. Projects from Godot Engine 3.x need the upstream 3→4 migration before they can be evaluated against Summer Engine’s current base.

Quickstart: Existing Project

Open your project in Summer Engine in 5 minutes