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Browser preview recordingStart times out on an agent-owned dev-client tab #28137
Description
Note
🤖 gpt-6.1-sol responding on behalf of Elliot
The built-in Browser tool returned Preview automation recordingStart timed out after 15000ms on an agent-owned tab after pairing with an isolated Windows development environment.
Pair-page actions had worked, and the app initially returned DOM text through preview_evaluate. After loading the thread page, this operation failed. The tab remained available and owned by the same caller. No credentials are included in this report. Related initial snapshot failure: #28136.
Source: 28416e9, Windows, Codex harness. Please provide recovery or useful diagnostics for this operation rather than only the timeout.
Activity
juliusmarminge commentedon Oct 31, 2026
Duplicate of https://git.cafe/pingdotgg/t3code/issues/23514.
On main at 79f1fad,
preview_recording_starton a server-driven tab captures a first frame with a barePage.captureScreenshot(captureViewportinapps/server/src/preview/ServerBrowserPage.ts) while holding the tab's capture lock, with no deadline. When the tab stops producing frames (the same condition behind the snapshot timeouts in https://git.cafe/pingdotgg/t3code/issues/28136), that capture never settles, the broker gives up at 15000ms, and later actions on the tab queue behind it. https://git.cafe/pingdotgg/t3code/issues/23514 tracks this exact sequence (snapshot timeout, thenrecordingStart, then click/evaluate timing out until the tab is closed) and asks for the same outcome: a bounded failure that leaves the tab usable.For reference, on Linux at the same commit,
preview_recording_starton a freshly paired dev-client thread tab returned at once and recorded normally, so the trigger is a tab that has stopped drawing, not the dev-client page itself.Closing in favour of https://git.cafe/pingdotgg/t3code/issues/23514; follow that issue for the fix.