Accessibility Check for Docs Agent

A customer using a screen reader complains that your setup guide has 14 images with no description and a heading that jumps from level 2 to level 4. This agent scans new and changed pages before they publish. It checks alt text on images, heading order, table headers, link text such as click here, language settings and, for PDFs, tags and reading order. It also measures contrast on screenshots and callouts. For each problem it drafts a fix on a draft copy, such as an alt text based on the caption and surrounding text, or a corrected heading level. It then rescans the draft to confirm the fixes worked and nothing new broke. Items that cannot be fixed automatically go on a list for the writer, such as a diagram that needs a long description. The writer approves the changes before publishing. Edge case: a decorative image should have empty alt text, so the agent leaves it.