Add built-in OpenCode sidebar status integration

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

@@ -1,11 +1,11 @@
 # cmux-owned Swift file length budget.
 # Format: max_lines<TAB>relative path
 # Reduce counts as files shrink. CI fails if tracked files exceed this budget.
-34475	CLI/cmux.swift
-17604	Sources/AppDelegate.swift
+35033	CLI/cmux.swift
+17602	Sources/AppDelegate.swift
 15933	Sources/ContentView.swift
-14104	Sources/TerminalController.swift
-12658	Sources/Workspace.swift
+14179	Sources/TerminalController.swift
+12659	Sources/Workspace.swift
 12115	cmuxTests/AppDelegateShortcutRoutingTests.swift
 11833	Sources/GhosttyTerminalView.swift
 11413	Sources/Panels/BrowserPanel.swift
@@ -79,8 +79,8 @@
 1197	cmuxTests/CodexAppServerSessionTests.swift
 1161	cmuxTests/SidebarOrderingTests.swift
 1144	cmuxTests/PiVaultAgentPersistenceTests.swift
+1134	cmuxTests/AgentHibernationTests.swift
 1126	cmuxTests/FileExplorerStoreTests.swift
-1120	cmuxTests/AgentHibernationTests.swift
 1107	Sources/AppDelegate+CmuxSSHURL.swift
 1093	cmuxUITests/BonsplitTabDragUITests.swift
 1087	Packages/macOS/CmuxCommandPalette/Sources/CmuxCommandPalette/Search/CommandPaletteFuzzyMatcher.swift
@@ -130,7 +130,7 @@
 716	Sources/TaskManagerSnapshot.swift
 715	Sources/AppleScriptSupport.swift
 710	Sources/TerminalSSHSessionDetector.swift
-707	CLI/CMUXCLI+AgentHookDefinitions.swift
+709	CLI/CMUXCLI+AgentHookDefinitions.swift
 706	CLI/CMUXCLI+Config.swift
 699	cmuxTests/TerminalNotificationClearAllTests.swift
 696	cmuxTests/UpdatePillReleaseVisibilityTests.swift

CLI/CMUXCLI+AgentHookDefinitions.swift

@@ -134,7 +134,7 @@ extension CMUXCLI {
     }
 
     enum AgentHookAction {
-        case sessionStart, promptSubmit, stop, notification, approvalResponse, sessionEnd, sessionFinalize, noop
+        case sessionStart, promptSubmit, stop, notification, approvalResponse, sessionEnd, sessionFinalize, runtimeStatus, runtimeNotification, noop
     }
 
     static let subcommandActions: [String: AgentHookAction] = [
@@ -143,6 +143,8 @@ extension CMUXCLI {
         "stop": .stop,
         "notification": .notification,
         "notify": .notification,
+        "runtime-status": .runtimeStatus,
+        "runtime-notification": .runtimeNotification,
         "agent-response": .stop,
         "approval-response": .approvalResponse,
         "shell-exec": .promptSubmit,

CLI/CMUXCLI+ExecutableResolution.swift

@@ -27,6 +27,13 @@ extension CMUXCLI {
         return prefix.contains("cmux claude wrapper - injects hooks and session tracking")
     }
 
+    func isCmuxOpenCodeWrapper(at path: String) -> Bool {
+        guard let data = FileManager.default.contents(atPath: path) else { return false }
+        let prefixData = data.prefix(512)
+        guard let prefix = String(data: prefixData, encoding: .utf8) else { return false }
+        return prefix.contains("cmux opencode wrapper - installs cmux plugins")
+    }
+
     func isCmuxClaudeCommandShim(at path: String) -> Bool {
         let candidate = URL(fileURLWithPath: path, isDirectory: false)
             .standardizedFileURL
@@ -112,6 +119,14 @@ extension CMUXCLI {
         resolveExecutableInSearchPath("codex", searchPath: searchPath)
     }
 
+    func resolveOpenCodeExecutable(searchPath: String?) -> String? {
+        resolveExecutableInSearchPath(
+            "opencode",
+            searchPath: searchPath,
+            skip: { self.isCmuxOpenCodeWrapper(at: $0) }
+        )
+    }
+
     func providerExecutableSearchPath(searchPath: String?, includingExecutableAt executablePath: String? = nil) -> String {
         var directories = providerExecutableSearchDirectories(searchPath: searchPath)
         if let executablePath {