Pro Preview evidence · safe rejection

Controlled failure

In failure mode, the page adds large blocks whenever capture approaches the bottom. The engine should stop after its bounded growth allowance instead of producing misleading output.

Challenge: Document keeps growing during traversal
Expected result: Bounded PAGE_CHANGED failure and scroll restoration
Review boundary: Stable mode exists for ordinary inspection

Seed Mode Failure growthBlocks 3

Initial 01

Growth begins near the bottom.

This synthetic page contains no customer or remote content.

Initial 02

The first measurements still look ordinary.

Only continued traversal reveals that the document does not settle.

Initial 03

A safe engine has a stopping rule.

Kapture IT should reject excessive growth and restore the original page state.