Figma Plugin API 3.0 Adds Live Data Streams and Threaded Worker Processes

Tech · 4 min read

Plugin API 3.0 allows plugins to subscribe to live data streams (WebSocket and gRPC) with built-in reconnection and backpressure handling. This unlocks use cases like live design systems syncing, real-time analytics overlays, and collaborative plugin actions.

Threaded worker processes let plugin authors perform CPU-intensive tasks — vector simplification, batch export, or ML inference — without blocking the main UI. Workers share data through a structured message system and can persist checkpoints for resumable work.

Figma also rolled out sample plugins and migration guides to help developers transition. Plugin authors can now build more powerful tools that integrate external systems while retaining a responsive design canvas experience.