[teamleaderleo]

Base-red-job: web / react-apps-check (5)
Base-red-job: web / react-apps-check

Fixes the base red in webviews/test/agent-pane-tool-group-overlap.test.ts › "tool output has no floating duplicate and its copy stays clear of text" (run 41446657178, job 125281605400, at 10aaddb; failed on the first run and on the retry).

Cause

The test opens the agent-pane.copy-controls gallery entry, but the file's beforeAll warms only its other entry (agent-pane.tool-group-overlap). On a dev server whose dependency optimizer has not seen this entry, the optimizer bundles what the entry's first load discovered and sends a full-page reload about a second in. That lands after the test has clicked the tool row open: the .cv-tool-output__box it hovers detaches (the CI log's "element was detached from the DOM", then a 30 s hover timeout) or the page comes back with the row closed (the retry's "Copy" count of 0). On cmux-ci it shows as evaluate: Execution context was destroyed, most likely because of a navigation right after the row opens.

It is not a product regression. The webview code is the same at the last green (765b0d5) and the red (10aaddb): the only commit between them is #32107 (Rust only), and #32196, #32152 and #32151 were already in the green commit. The test has been unwarmed since it was added in #26096; it fails whenever the runner's optimizer starts cold, which it now does on every cmux-ci run (0/10 below).

Fix

beforeAll also warms agent-pane.copy-controls (variant output) with warmGalleryFrame, which waits until the optimizer has settled and sent no reload, as it already does for the other entry. No timeout changed and no product code changed.

An earlier commit on this branch waited for the fold to settle before hovering. That did not address the reload (1/10, run 41451432643), so the final head drops it.

Evidence (cmux-ci, 10 runs of the file each)

tree	result	run
base test file (feat-cmux-next)	PASS=0 FAIL=10	41451412190
first attempt (settle wait only)	PASS=1 FAIL=9	41451432643
head 298bf16 (warm-up)	PASS=10 FAIL=0	41456258383

Observed / Not run

• Observed: the three 10x loops above; base and the first attempt fail with "Execution context was destroyed" right after the tool row opens; the head passes 10/10.
• Not run: the full react-apps-check shard locally (no node_modules on this host); scripts/web-lint.sh with CMUX_LOCAL_HEAVY_CHECKS=0 skipped webviews for the same reason, so lint is left to the PR's web lint job. Not confirmed which dependency the optimizer bundles for this entry.

Agent session: agent session

🤖 Generated with Claude Code

[github-actions]

cmux status _{(one comment, edited in place; each line is updated by the job that owns it)}

Review 298bf16: HQ feed card · gallery before/after runs · checks

App of this head (app.zip, kept 1 day)

gh workflow run reload-build.yml -R manaflow-ai/cmux --ref feat-cmux-next -f tag=pr32313 -f ref=lane/web-base-red-tool-output-copy -f platform=macos -f backend_mode=local

Shipped in:

• cmux NEXT nightly 1.0.0-nightly.4146407770301 (178be28b19)
• cmux NEXT nightly 1.0.0-nightly.4146646830601 (5cc7eb6dd8)
• cmux NEXT nightly 1.0.0-nightly.4147112615101 (d94d657f7c)

[teamleaderleo]

Review (claude-opus-5-5): SHIP at 298bf16

Review (subagent claude-opus-5-5 medium): SHIP at 298bf16

Test-only: the added warmGalleryFrame(vite, "agent-pane.copy-controls", { variant: "output" }) matches the entry and variant the copy test opens and, given the server, returns only after the optimizer settles with no reload sent; no assertion or product code changes.

Follow-ups: none blocking. The warm-up does not set the test's cmuxExperiments hover-actions init script, so a dependency imported only on that path would still be cold. The reported 10/10 suggests none exists.