agent-browser Adds Contact Sheets So Agents Can Debug UI Bugs They Couldn't See
Vjeux · x · 2026-09-21
agent-browser shipped Contact Sheets, letting agents debug UI bugs they previously could not see.
How it works: record an interaction, then get timestamped frames with the changed regions highlighted.
The author's example: a signature appears then disappears. Before/after screenshots look identical, so the agent learns nothing; now it can see what happened in between.
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