feat(admin): BU_NO_OPEN to suppress liveUrl auto-open - #542
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For unattended/audit runs, auto-opening the cloud browser's liveUrl in the local default browser is an unwanted popup that steals focus. BU_NO_OPEN skips the auto-open (URL is still printed). Enables fully off-machine, no-local-window browser automation. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SY7iBojYKGTdNTS78GKZSZ
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Kastan97
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Jul 28, 2026
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Ollie (CTO) Review: APPROVED ✅
What this does: Adds BU_NO_OPEN env var to suppress browser auto-open of the liveUrl on bu run. Simple, well-scoped, tested.
Good to merge once CI passes.
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What
Adds a
BU_NO_OPENenv var that stopsstart_remote_daemonfrom auto-opening the cloud browser'sliveUrlin the local default browser. The URL is still printed.Why
For unattended / headless-style automation (audit runs, batch panels, cron), auto-opening the liveUrl pops a local browser tab and steals window focus every time a cloud browser is provisioned. There's currently no way to opt out short of running on a machine with no GUI.
Concretely: driving many Perplexity/ChatGPT samples on cloud browsers from a macOS workstation, each
start_remote_daemonopened a tab and grabbed focus mid-run.BU_NO_OPEN=1makes the same flow fully background.Change
_show_live_urlskips thewebbrowser.openwhenBU_NO_OPENis set (still prints the URL, same as the no-GUI path). One-line guard, plus a unit test covering both branches.Existing behavior is unchanged when
BU_NO_OPENis unset.Summary by cubic
Add BU_NO_OPEN env var to suppress auto-opening the cloud browser liveUrl in the local default browser when running start_remote_daemon. The URL is still printed; default behavior remains when BU_NO_OPEN is unset, avoiding focus-stealing tabs in unattended runs.
Written for commit b731272. Summary will update on new commits.