OpenFig reverse engineering of the Figma .fig Kiwi format

Document status: reviewed. Canonical source.

Summary

OpenFig documents .fig as a ZIP containing a Kiwi-serialized canvas.fig whose schema is embedded and evolves with Figma versions. Its tooling can parse and encode documents and package .fig archives. Independent Grida research similarly extracts current Kiwi schemas.

NUIF relevance

This makes high-fidelity Figma adapters technically feasible, but the embedded schema is vendor-controlled and mutable. Reverse-engineered internals are compatibility evidence only, never a dependency or canonical semantic source for NUIF.