Browser Maze

1. open Files (failed): Open the file manager to locate Downloads/task.html.
2. swipe up: Open app drawer to find the file manager, since opening the generic Files app name was ambiguous.
3. tap “Files app”: The app drawer shows the Files icon, which opens the file manager for Downloads.
4. tap “task.html file”: Open the exact task.html file shown in Downloads.
5. tap “Chrome Just once”: Chrome is the selected handler for task.html; open it just once to reach the maze.
6. tap “Chrome onboarding continue”: Chrome's initial welcome screen blocks the opened task.html; continue onboarding to reach the maze.
7. tap “No thanks”: Dismiss Chrome's optional sync onboarding so the already-opened task.html maze can appear.
8. tap at (157, 2232): The Chrome sync prompt still obstructs the maze after the ref tap. Retry the same control at its observed screen coordinates to dismiss it, without leaving or resetting the page.
9. tap “task.html”: Downloads shows the exact task.html file; reopen it to reach the maze after Chrome onboarding returned to Files.
10. tap “Just once”: Chrome is selected for the exact task.html file; tap Just once to display its maze.
11. tap at (490, 825): The maze page exposes the Right button at (418,787 144x76), and Success is not yet visible. Move X right once and inspect the resulting screenshot before the next move.
12. tap at (200, 825): X is at row 1, column 2 of the 4×4 maze; the cell below is open. Move down and read its new position before the next move.
13. tap at (490, 825): The screenshot shows X in row 2, column 2, with the cell to its right open. Success is absent, so move right and read the next position.
14. tap at (200, 825): X is in row 2 column 3, and the cell directly beneath it is open. Move down toward the green bottom-right cell; Success is not yet shown.
15. tap at (200, 825): The screenshot places X in row 3, column 3, with an open cell directly below it. Move down, then read its new position before moving right to the goal.
16. tap at (490, 825): The screenshot shows X in the bottom row, third column, immediately left of the green bottom-right goal. Tap Right to enter it; Success is not yet displayed, so the completion predicate does not yet hold.
17. assertAI: The preceding move placed X immediately left of the bottom-right goal, then Right was tapped. The current screenshot visibly displays “Success!” in place of the maze, the page's explicit solved state. Finish without navigating away.

Verdict: Step verified deterministically from the assertion outcome