iOS: registry-driven auto-attach (sign in → connected)

.github/swift-file-length-budget.tsv

@@ -18,18 +18,18 @@
 6156	Sources/TabManager.swift
 6153	CLI/cmux_open.swift
 6074	Sources/TextBoxInput.swift
+5987	Packages/CmuxMobileShell/Sources/CmuxMobileShell/MobileShellComposite.swift
 5925	cmuxTests/TerminalAndGhosttyTests.swift
 5526	cmuxTests/BrowserConfigTests.swift
-5551	Packages/CmuxMobileShell/Sources/CmuxMobileShell/MobileShellComposite.swift
 4920	Sources/cmuxApp.swift
 4467	Sources/Panels/FilePreviewPanel.swift
 4400	cmuxTests/BrowserPanelTests.swift
 4227	Sources/BrowserWindowPortal.swift
 3937	Sources/Feed/FeedPanelView.swift
 3926	cmuxTests/TabManagerUnitTests.swift
 3903	cmuxTests/WindowAndDragTests.swift
-3699	cmuxTests/CLIGenericHookPersistenceTests.swift
 3734	Packages/CmuxMobileTerminal/Sources/CmuxMobileTerminal/GhosttySurfaceView.swift
+3699	cmuxTests/CLIGenericHookPersistenceTests.swift
 3397	Sources/CmuxConfig.swift
 3331	cmuxTests/TabManagerSessionSnapshotTests.swift
 3055	Sources/Update/UpdateTitlebarAccessory.swift
@@ -93,6 +93,7 @@
 945	Sources/SessionIndexRegisteredAgents.swift
 937	Sources/TextBoxMentionIndexStore.swift
 934	Sources/App/ShortcutRoutingSupport.swift
+932	Packages/CmuxMobileShell/Tests/CmuxMobileShellTests/MobileAutoAttachTests.swift
 926	Sources/DockPanelView.swift
 920	Sources/CommandPalette/CommandPaletteSettingsToggle.swift
 918	cmuxTests/WorkspaceGroupTests.swift
@@ -119,6 +120,7 @@
 752	cmuxUITests/CloseWorkspaceCmdDUITests.swift
 749	Packages/CmuxTerminal/Sources/CmuxTerminal/Surface/TerminalSurface+Input.swift
 746	Sources/App/MenuBarExtraController.swift
+744	Packages/CmuxMobileShellUI/Sources/CmuxMobileShellUI/TerminalComposerView.swift
 738	Packages/CMUXProjectModel/Sources/CMUXProjectModel/XcodeProjectAdapter.swift
 736	Packages/CmuxAuthRuntime/Sources/CmuxAuthRuntime/Coordinator/AuthCoordinator.swift
 726	cmuxTests/CLICodexHookTimeoutRegressionTests.swift
@@ -176,6 +178,7 @@
 562	cmuxTests/AgentExecutableResolverTests.swift
 561	cmuxTests/GhosttyConfigPathResolverTests.swift
 558	Packages/CmuxGit/Sources/CmuxGit/Parsing/GitMetadataService+Config.swift
+557	Packages/CmuxMobileShellUI/Sources/CmuxMobileShellUI/WorkspaceDetailView.swift
 554	Sources/Panels/BrowserAutomation.swift
 551	Packages/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/BrowserSection.swift
 547	Packages/CmuxSocketControl/Sources/CmuxSocketControl/SocketControlSettings.swift
@@ -199,7 +202,6 @@
 520	cmuxTests/MainWindowVisibilityControllerTests.swift
 519	Packages/CmuxSwiftRender/Tests/CmuxSwiftRenderTests/Corpus/stress-two-column-cockpit-sidebar.swift
 519	Sources/CmuxConfigExecutor.swift
-557	Packages/CmuxMobileShellUI/Sources/CmuxMobileShellUI/WorkspaceDetailView.swift
 518	Packages/CmuxSwiftRender/Tests/CmuxSwiftRenderTests/Corpus/stress-git-review-queue-command-deck.swift
 517	Sources/TerminalImageTransfer.swift
 514	Packages/CmuxSwiftRender/Sources/CmuxSwiftRender/ExpressionEvaluator.swift
@@ -212,4 +214,3 @@
 503	Sources/Settings/ConfigSource.swift
 502	Packages/CmuxControlSocket/Tests/CmuxControlSocketTests/ControlCommandContextTestStubs.swift
 502	Sources/CmuxEventPublishing.swift
-744	Packages/CmuxMobileShellUI/Sources/CmuxMobileShellUI/TerminalComposerView.swift

Packages/CmuxMobileShell/Sources/CmuxMobileShell/MobileAutoAttachPresenceProviding.swift

@@ -0,0 +1,16 @@
+public import Foundation
+
+/// An online/offline signal for registry-driven auto-attach target selection.
+///
+/// Optional seam: when no presence provider is wired (the presence service is
+/// not merged yet, #5792), auto-attach degrades to most-recently-seen selection,
+/// which is correct for the dominant single-Mac team. Once the presence client
+/// lands, an adapter conforming to this protocol lets auto-attach prefer the live
+/// Mac and treat multiple live Macs as ambiguous (fall through to manual pair)
+/// rather than guessing on recency.
+public protocol MobileAutoAttachPresenceProviding: Sendable {
+    /// The device ids the presence service currently reports as online, scoped to
+    /// the signed-in user's team. Best-effort: a `nil` snapshot means "no
+    /// presence signal right now," so selection falls back to recency.
+    func onlineDeviceIDs() async -> Set<String>?
+}

Packages/CmuxMobileShell/Sources/CmuxMobileShell/PresenceMap.swift

@@ -86,4 +86,19 @@ public struct PresenceMap: Equatable, Sendable {
             lastSeenAt: Date(timeIntervalSince1970: lastSeenMs / 1000)
         )
     }
+
+    /// The device ids the live presence stream currently reports online (any
+    /// instance online), using the same rollup rule as ``deviceSummary``. This
+    /// is the auto-attach target selector's presence signal: it prefers a single
+    /// live Mac and treats 2+ live Macs as ambiguous instead of guessing on
+    /// recency. Empty when no presence data has streamed yet, which the caller
+    /// distinguishes from "data exists, nobody online" via ``isEmpty``.
+    public func onlineDeviceIDs() -> Set<String> {
+        var ids: Set<String> = []
+        for (deviceId, instances) in instancesByDevice
+        where instances.values.contains(where: { $0.online }) {
+            ids.insert(deviceId)
+        }
+        return ids
+    }
 }