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.
-- Evan Stade