DX-3107: Add the Scheduled Browser Use Agent guide for Box

[alitariksahin]

Summary

Adds box/guides/browser-use.mdx, a guide that runs a Browser Use agent inside a box on a daily schedule. The agent, the browser, and the reports it writes all live in the box.

• agent.py runs in the box: starts the box's Chromium, runs the task, and writes a markdown report to reports/. It exits with an error if the agent does not finish the task.
• setup.py runs locally: creates a box with a browser, installs Browser Use, runs the agent once, prints the report, and schedules it daily with box.schedule.exec.
• reports.py re-attaches to the box and prints the reports.
• Added to the Guides nav after "Playwright Web Scraping".

Complements #879, which covers driving the box browser with Browser Use from your own machine over CDP.

Testing

Run from a fresh folder with the code copied from the MDX (browser-use 0.13.10, upstash-box 0.3.0):

• setup.py finished in 208s with a report in front-page order; reports.py printed it; the daily schedule was created.
• A scheduled run on a paused box auto-resumed the box, ran the agent, and completed.
• Agent runs take 3.5–4.5 minutes, which needed upstash/box-backend#280 (exec timeout raised from 5 minutes to 1 hour); that is merged and verified on the deployed backend.
• MDX compiles; previewed with docs7 dev.

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Project	Status	Preview	Updated
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Result	Status	Action
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Content review	✅ Passed. No problems found.	View findings

Commit e95f8b9 · Updated 2026-10-04 21:13 UTC · View build details

[linear-code]

DX-3107

[alitariksahin]

Folded into #879 so both Browser Use changes ship in one PR and the llms regeneration runs against main.