[teamleaderleo]

Leo, 2026-10-27: "why are there two copy-paste symbols? I mean, two copy symbols". Leo, 2026-10-29: "wouldnt it be a little copy symbol on the top right within this card?" (#28057).

When a message from another agent is opened, it shows two Copy buttons. The card draws its Copy in the top-right corner (CardCopy, #28057), and the line's hover row draws a second one beside the time (ReceivedActions' MessageCopy). The two even copy different text: the corner copies the unsigned words, the row copies the raw text. design/chat-transcript.md says "Each message has one Copy control".

What changes

• Opened, the card's corner Copy is the message's only Copy, and the line's hover row draws none (CardCopyShownContext, provided by IncomingMessageLine, read by ReceivedActions).
• Closed, the row's Copy is the only one, as before.
• Time, Retry, Pin, Reply and a waiting steer's ⋯ stay in the row. Nothing else changes, and nothing is removed: each state keeps exactly one Copy. A sub-session's prompt card and a wait's reply had only the corner Copy already.

Tests (red at the first commit, green at the head)

• webviews/test/received-message-one-copy-browser.test.ts: Chromium on the gallery's agent-pane.incoming-message (long and opened), with the pointer on the message's line. Closed shows 1 Copy; opened shows 1 Copy, in the corner; closed again shows the row's Copy back. It writes 2x light and dark stills of the opened message.

Stills

Gallery agent-pane.incoming-message / opened, Chromium, synthetic data, light and dark: to follow from the cmux-ci runs at the red commit (before) and the head (after).

Observed / Not run

• Observed: vp fmt and the browser-lane check on the changed files. web-lint's other failures are base debt in files this PR doesn't touch.
• Not run yet: the test (it goes to cmux-ci).

Changelog

Fixed: an opened message from another agent shows one Copy button, not two.

Design spec: leo-workspace design/chat-transcript.md ("Delivery and actions").

Agent session: agent session

🤖 Generated with Claude Code

[blacksmith-sh]

Found 5 test failures on Blacksmith runners:

Failures

Test	View Logs
main.DeveloperIdAppTests.test_download_prints_the_active_profile_only/ test_download_prints_the_active_profile_only	View Logs
stubs: /System/Library/Frameworks/Security.framework/Versions/A/Security has no stub/ Security has no stub	View Logs
stubs: CoreFoundation.tbd: install-name /System/Library/Frameworks/ CoreFoundation.framework/Versions/A/CoreFoundation, missing 1: ['_CFRetain']/ CoreFoundation, missing 1: ['_CFRetain']	View Logs
stubs: CoreFoundation.tbd: install-name /System/Library/Frameworks/ CoreFoundation.framework/Versions/A/CoreFoundation, missing 1: ['_log2']/ CoreFoundation, missing 1: ['_log2']	View Logs
test_the_ten_first_party_gpl_crates_are_named_exactly (main.AppCrateLicenseGate.tes t_the_ten_first_party_gpl_crates_are_named_exactly)/ test_the_ten_first_party_gpl_crates_are_named_exactly (main.AppCrateLicenseGate.tes t_the_ten_first_party_gpl_crates_are_named_exactly)	View Logs

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[teamleaderleo]

Superseded by #29169 (merged as 2a5cdb2 on feat-cmux-next): a received message line no longer draws a hover Copy at all, so an opened message from another agent already has exactly one Copy, the card's corner Copy. ReceivedActions on base renders only the time, Retry and more. Closing this one.