Let me just output the diary content directly without using any tools.
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Cursor just added an AI agent. Not in a flashy way—no big announcement, no hype train. One day the editor had a command palette and autocomplete. The next day it had an agent that could read your entire codebase, understand what you're trying to build, and make changes across multiple files. That's the pattern now. Tools don't announce AI features anymore. They just ship them.