K2 Project Export

K2 Project Export is the save button for the K2 Lab suite in comfyui-FVMtools. It serializes everything you've built - regions, LoRAs, emphases, tuning, projector, even the global prompts - into a single JSON string following the K2Lab project schema. From there you can paste it back into K2Lab / K2 Region Studio, store it next to your outputs, or feed it to K2 Project Import in another workflow to reproduce the layout exactly.

If you've built a two-character layout you like, this is how you keep it. The alternative - screenshotting your node graph and re-typing pixel coordinates from memory - is exactly the workflow this node exists to kill.

The inputs

• width / height - canvas size, stored with the project so the boxes make sense when reopened.
• regions - the region chain to serialize.
• loras - the LoRA assignments.
• emphasis - phrase emphases.
• tuning - spatial tuning.
• projector - projector settings.
• plan - an alternative source for the regions when no region chain is connected (grab it from K2 Compose's plan output).
• global_prompt / negative_prompt - stored with the project, so a re-import restores the full text context too.

Output is a single project_json string. It's an output node - it runs and shows you the JSON, and you copy it out or save it to a file.

When you'll use it

Three cases. You're moving layouts between your own workflows and want them reproducible; you're collaborating and want to hand someone a layout without sending a .json workflow file and all its node positions; or you use K2Lab / K2 Region Studio as well as ComfyUI and want both tools to speak the same project format. The schema is the published K2Lab one, so a project exported here pastes into the standalone app - that's the round-trip the author built it for.

It pairs with K2 Project Import as the read side: export to a JSON string, keep it in a text file or a note, import it back whenever you need the layout again. Together they're the closest thing this suite has to named, saved scenes.

Install

Same as the whole pack:

cd ComfyUI/custom_nodes
git clone https://github.com/ping1979ping/comfyui-FVMtools

Restart ComfyUI, find it under FVM Tools/K2. No extra dependencies.

One habit worth forming: export at the point your layout is stable, and export again after you've tuned priority or role - those are exactly the fields that feel obvious at build time and impossible to remember a week later.