[only21mil]

Problem

preview_act hover and drag hand the full timeoutMs to each Playwright step (scrollIntoViewIfNeeded, boundingBox, then hover or dragTo), so a target that shows up late and stays covered runs past timeoutMs. With timeoutMs 3000 the agent waits about 4 s, until the broker gives up at timeoutMs + 1 s, instead of the action failing at 3 s.

Change

hover and drag now use the same single deadline main's click uses (445d32c): targetPoint, hover, dragTo and the drag's last boundingBox each get only the time left. The action as a whole now fails at timeoutMs, inside the broker's grace. Only the total is capped.

Scope

Bug fix: hover and drag overrun their timeout. #25557 reported it for click; main fixed click in 445d32c (#34922), whose description leaves hover and drag to this PR. One file plus one test table, no contract, tool text or UI change. select is left out to keep this to one problem.

This PR no longer claims these, because main now has them:

• Click's single deadline, and its named reason ("still matches an element after the timeout") reaching the agent: 445d32c.
• The preview host kept after a timed-out action: 713731f.

445d32c also counts click's queue wait and adds Playwright's last actionability reason, which this PR never did. For hover and drag, time spent waiting in the tab's queue is still not counted, and this PR does not add it.

Verification

To see it on Linux: in a T3 server's built-in browser, preview_act hover #info with timeoutMs 3000 on a page where #info appears 2 s after a trigger click, under a full-page cover.

Run on 2026-11-13: one T3 test server per revision (t3 serve from source, fresh state, machine name "Test machine"), the real Codex CLI 0.169.0 with gpt-6-luna running one unchanged script of preview_open, preview_act and preview_status calls. Codex's own durations, timeoutMs 3000:

preview_act	main 445d32c	076f1dd
hover #info	4011 ms	3013 ms
drag #card onto #lane	4010 ms	3008 ms
click #save (main's code on both)	3016 ms	3013 ms

Messages are the same on both, and preview_status reports the tab after every action.

Test table "gives the hover's / drag's steps one shared timeout": with main 445d32c's ServerBrowserPage.ts, 2 failed, 38 passed; on 076f1dd, 40 passed. On 076f1dd, PreviewAutomationBroker.test.ts, ServerBrowser.test.ts and vp run check:changed pass.

Not checked:

• The desktop (Electron) preview host. It runs the same ServerBrowserPage code.
• macOS and Windows hosts, and remote or relay connections.
• A drag that succeeds. The drag here only shows the timeout.

Codex records on main 445d32c and 076f1dd, and the failing test on main

revision: main 445d32c2c3
codex-cli 0.169.0, model gpt-6-luna through an API gateway
Codex McpToolCall records, preview_act with timeoutMs 3000 (trigger clicks omitted):
click  #save            3016 ms  failed    Preview automation click timed out after 3000ms. The click may have happened; check the page before retrying. "#save" still matches an element after the timeout. Playwright last saw: element is not enabled.
  preview_status right after: host available
hover  #info            4011 ms  failed    Preview automation hover timed out after 3000ms.
  preview_status right after: host available
drag   #card -> #lane   4010 ms  failed    Preview automation drag timed out after 3000ms.
  preview_status right after: host available

revision: tip 076f1dd36c
codex-cli 0.169.0, model gpt-6-luna through an API gateway
Codex McpToolCall records, preview_act with timeoutMs 3000 (trigger clicks omitted):
click  #save            3013 ms  failed    Preview automation click timed out after 3000ms. The click may have happened; check the page before retrying. "#save" still matches an element after the timeout. Playwright last saw: element is not enabled.
  preview_status right after: host available
hover  #info            3013 ms  failed    Preview automation hover timed out after 3000ms.
  preview_status right after: host available
drag   #card -> #lane   3008 ms  failed    Preview automation drag timed out after 3000ms.
  preview_status right after: host available

The table's fake page advances a mocked Date.now by 5 s for each lookup step of a 9 s timeout. With main 445d32c's ServerBrowserPage.ts under 076f1dd's test file, every step gets 9000:

 FAIL  src/preview/ServerBrowserPage.test.ts > server browser action timeout > gives the hover's steps one shared timeout
- Expected
+ Received
  [
    "#a.scrollIntoViewIfNeeded 9000",
-   "#a.boundingBox 4000",
-   "#a.hover 1",
+   "#a.boundingBox 9000",
+   "#a.hover 9000",
  ]
 FAIL  src/preview/ServerBrowserPage.test.ts > server browser action timeout > gives the drag's steps one shared timeout
- Expected
+ Received
  [
    "#a.scrollIntoViewIfNeeded 9000",
-   "#a.boundingBox 4000",
-   "#a.dragTo 1",
-   "#b.boundingBox 1",
+   "#a.boundingBox 9000",
+   "#a.dragTo 9000",
+   "#b.boundingBox 9000",
  ]
 Test Files  1 failed (1)
      Tests  2 failed | 38 passed (40)

Generated with Claude Opus 5.5 in T3 Code Nightly

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Walkthrough

hover and drag now use a shared timeout deadline across their action steps. Tests verify that later steps receive the time remaining after earlier work.

Changes: Browser action timeout

Layer / File(s)	Summary
Deadline propagation and coverage apps/server/src/preview/ServerBrowserPage.ts, apps/server/src/preview/ServerBrowserPage.test.ts	hover and drag pass the remaining time from a shared deadline to target positioning and subsequent locator operations. Tests check the remaining timeout passed to later steps.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: juliusmarminge

Merge Risk: Minimal · up to 27c83

Hover and drag now fail within their configured timeout instead of running up to about three times longer. Tests cover the new timing behavior, and no merge-blocking risk remains.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title accurately names the main change: hover and drag in the preview server browser now fail within their timeout instead of running up to 3x longer. The changeset matches this, since hover and d…
Description check		The description follows the repository template closely. It has Problem, Change, Scope, and Verification sections. The Problem section explains the bug, expected behavior, and reproduction steps. The …
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Title check

Explanation

The title accurately names the main change: hover and drag in the preview server browser now fail within their timeout instead of running up to 3x longer. The changeset matches this, since hover and drag now share one deadline across their Playwright steps. The title uses the conventional commit format and is specific enough for a teammate to understand the primary change. It is 81 characters, slightly above a short ideal, but this does not reduce its clarity.

Full details: Description check

Explanation

The description follows the repository template closely. It has Problem, Change, Scope, and Verification sections. The Problem section explains the bug, expected behavior, and reproduction steps. The Change section explains the single-deadline fix and why only the total is capped. The Scope section links the related issue (#25557) and the main commit that fixed click, and it states why select is excluded. The Verification section gives focused test results, timing tables, and a clear list of what was not checked. The description does not include the commit-title guidance from the template comment, and it ends with a model attribution line, which the template asks for. These gaps are minor.

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Inline comments:
Review comments at @apps/server/src/preview/ServerBrowserPage.ts:
- Around line 719-725: Update the click, hover, and drag action paths around
targetPoint and pointer so pointer reporting observes the shared deadline and
locator operations are not started after it expires. Preserve observation of a
drag that has already started.

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[maria-rcks]

Note

Written by gpt-6.1-sol on behalf of Maria

Verified in a real dev environment

verified as-is at 29ff54703590a18e8fed65734515697770e16c4c on linux. i ran github/main first in a separate worktree, stopped its dev server, then ran the exact pr head with isolated task state. playwright drove the web client in /usr/bin/google-chrome. a project pointing at the real repo and real codex gpt-6.1-sol turns exercised the preview mcp, broker, and server browser.

no mock pages or seeded data: from chat, the real settings button opens settings after 2000ms. preview_act immediately targets the native disabled "restore device defaults" button with timeoutMs: 3000. its initial match count is zero.

main click: 4054ms, generic timeout; immediate status: no host
pr click:  3027ms, named "still matches an element" timeout
pr hover:  3016ms
pr drag:   3032ms
pr immediate status: available after all three (23/17/18ms)

locator close and hover, coordinate hover/click, and a valid click after a missing-target drag also passed. the close click actually dismissed settings. all 27 ServerBrowserPage.test.ts tests passed through blacksmith-check; current github checks have no failures.

this recording shows both real interactions. captions are measured mcp round trips; idle recording lead-ins were trimmed.

command and runtime transcript

Not verified

successful drag-and-drop had no real draggable target on this page. native electron/mobile clients, macos/windows hosts, and remote/relay/tunnel connections were not exercised. queue-wait budgeting is outside this pr's change.

[only21mil]

Note

🤖 Opus 5.5 replying on behalf of Victor.

@maria-rcks thanks for testing this through real agent turns. Your run covers the path ours didn't: the broker and MCP end to end. On main the delayed disabled click hit the broker's generic timeout at about 4 s and left the preview with no host. On this head the click returned its named "still matches an element" reason at 3027 ms, hover and drag ended at about 3 s, and the preview stayed available after all three. The locator, coordinate and click-after-drag checks also passing shows the shared deadline leaves actions that succeed alone.

[only21mil]

Note

🤖 Opus 5.5 replying on behalf of Victor.

Merged main to clear the conflict with #31925, which added an evaluate test block to ServerBrowserPage.test.ts in the same spot as this PR's timeout table. Both blocks are kept as they were. ServerBrowserPage.ts merged cleanly, and the change to it is the same as before. ServerBrowserPage.test.ts passes 33/33 with #31925's tests included, and the timeout table still fails on main's ServerBrowserPage.ts and passes here.

[only21mil]

Note

🤖 Opus 5.5 replying on behalf of Victor.

I merged main to clear a new conflict in the drag call. It keeps main's five mouse moves and still takes its timeout from the shared deadline, and nothing else in the fix changed.

[only21mil]

Note

🤖 Opus 5.5 replying on behalf of Victor.

The earlier test run on 29ff547 predates today's main changes and does not cover this commit. I merged main, and the PR now covers hover and drag only, because main has the click timing (#34922) and the kept preview host. I gave hover and drag main's single-deadline approach in 076f1dd.

[juliusmarminge]

Evidence

Same reproduction on both commits: open the fixture, click its trigger, then hover the delayed covered target with timeoutMs 3000. Reload and repeat with drag to the visible lane. Real web client and server, fresh synthetic state, Chromium 1280×800, light theme.

Before	After
043d712294	27c83d5c0e
Hover: 4016 ms; drag: 4012 ms, broker cutoff	Hover: 3023 ms; drag: 3015 ms, before broker grace expires
Before recording	After recording

The preview tab remained available after every timeout. scenarios:prove exited 0: failsOnBase=true, passesOnHead=true.

Scenario and embedded fixture/agent driver · Measured timing transcript