writing-assistance-apis

To integrate browser Writing Assistance APIs, validate API availability, implement guarded sessions for Summarizer, Writer, or Rewriter, and handle streaming or batch output. This encompasses session creation, quota measurement, and cleanup across common frontend architectures.

Browser Writing Assistance APIs include Summarizer, Writer, and Rewriter for in-browser text processing. They enable web apps to summarize, rewrite, or draft text directly in the user's browser based on user prompts without server-side calls.

Yes, user activation is required to create a session for the Summarizer or Writer API. You must instantiate the writing assistant surface by checking availability and creating the session only after the user explicitly interacts with the page.

The best way to handle missing Writing Assistance APIs is to implement UX patterns for fallback paths. You should validate the browser support surface for Summarizer, Writer, and Rewriter, and surface appropriate UX when the APIs are not available.

Browser text processing APIs fail in cross-origin iframes due to permissions-policy constraints. You need to handle cross-origin iframe delegation explicitly by configuring permissions and providing appropriate fallback UX patterns when delegation is restricted.

To manage model download progress for browser AI text features, implement UX patterns that surface progress feedback to the user. This involves monitoring the session lifecycle during availability checks and model downloads for the Summarizer, Writer, or Rewriter APIs.