Hello WebKit leads,

The File Handling API is a proposed spec addition to the PWA Manifest that allows apps to register with the operating system as file handlers.

Explainer: https://github.com/WICG/file-handling/blob/main/explainer.md
Outreach: https://web.dev/file-handling/
Spec change (in incubations): https://github.com/WICG/manifest-incubations/pull/51

It has undergone developer trial and origin trial in Chromium with positive developer feedback.

PTAL when you get a chance.