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* docs(agents): require minimally invasive, additive-first patches Codify the review feedback from the tray ghost-icon fix: fixes should add self-contained code around existing lines instead of restructuring them, keep platform-specific logic in src/platform/ with fn-local imports, and leave only thin one-line hooks in shared files. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(windows): stop duplicate tray icons from piling up (#15689) `check_process("--tray", ..)` is used to decide whether a tray process needs to be spawned, but it can miss one that is already running: it cannot read the command line of an elevated process from a non-elevated one (the installer spawns the tray elevated), and wmic, used by 32-bit builds since #11638, is gone from newer Windows 11. `connection.rs` runs that check once per incoming connection, so every miss added another tray icon and they kept piling up, which is the same blind spot behind #6692. Hold a named mutex in the session namespace as the authoritative single instance guard, so a redundant tray process exits before creating an icon. `ERROR_ACCESS_DENIED` also counts as "already running", since it means the mutex belongs to a tray we may not touch. Also remove the icon before the tray menu's "Stop service" calls uninstall_service(): on success it ends the process with std::process::exit, which skips the destructor that would call Shell_NotifyIcon(NIM_DELETE), so every click left a ghost icon behind. The icon is shown again if stopping the service failed or was cancelled. Ghost icons from the taskkill in the install/update/service flows are left alone here. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * docs(windows): note that update_me's pid lookup can silently find nothing The pids are matched by command line, which comes back empty for a 32-bit build reading 64-bit processes (hence the `wmic` fallback of #11638, and `wmic` is no longer installed by default since Windows 11 24H2) and for a non-elevated process reading an elevated one. `taskkill` matches by image name and still works, but the session lists are then empty, so the restore guard silently restores nothing and the update leaves the user without a tray icon and main window. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * docs(windows): record the confirmed cause of the duplicate tray icons Process Explorer output in #15689 pinned it down: run_after_run_cmds() spawns the tray in the caller's own context, so installing or toggling the service from a RustDesk that was itself started elevated leaves a high integrity tray behind, which a medium integrity main window cannot inspect afterwards. Record where the detection fails exactly, so the next reader doesn't have to rediscover that the executable path, not the command line, is what comes back empty. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>