cmux NEXT: agent work breathes a calm accent dot instead of a spinner on every row

Packages/macOS/CmuxNext/Sources/CmuxNextAgentPane/AgentPaneTheme.swift

@@ -72,6 +72,8 @@ enum AgentPaneTheme {
             // Static status indicators, or Reduce Motion (cx-sya4n): the page stops its status
             // loops and draws a shape per state (`data-status-indicators`).
             "statusIndicators": motion.reduceMotion || DesignSettings.shared.statusIndicator.animation == .static ? "static" : "animated",
+            // How agent work shows on the transcript's running rows (`data-working-look`).
+            "workingLook": StatusWorkingLook.tunable.value.rawValue,
         ]
     }
 

Packages/macOS/CmuxNext/Sources/CmuxNextDesign/Motion/Motion+AppKit.swift

@@ -390,6 +390,21 @@ extension MotionGate {
         return sweep
     }
 
+    /// Agent work's breath (1 -> `low` -> 1 over one `breath` period, eased), or nil when loops
+    /// are off. Slower and softer than the waiting pulse, so a list of working rows reads calm.
+    public func breathAnimation(low: Float) -> CAAnimation? {
+        guard let period = period(.breath) else { return nil }
+        let breath = CABasicAnimation(keyPath: "opacity")
+        breath.fromValue = 1
+        breath.toValue = low
+        breath.duration = period / 2
+        breath.autoreverses = true
+        breath.repeatCount = .infinity
+        breath.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
+        breath.isRemovedOnCompletion = false
+        return breath
+    }
+
     /// An opacity pulse (1 -> `low` -> 1), or nil when loops are off.
     public func pulseAnimation(low: Float) -> CAAnimation? {
         guard let period = period(.pulse) else { return nil }

Packages/macOS/CmuxNext/Sources/CmuxNextDesign/Motion/MotionFadeTokens.swift

@@ -63,6 +63,8 @@ public nonisolated enum MotionLoop: String, Sendable, CaseIterable {
     case flash
     /// Unmeasured progress: a segment crosses its track once.
     case sweep
+    /// Agent work's dot, one breath (bright, dim and back; `StatusWorkingLook.breathe`).
+    case breath
 
     /// Seconds per period, never under `minimumPeriod` (a Debug Settings
     /// override included).
@@ -82,6 +84,8 @@ public nonisolated enum MotionLoop: String, Sendable, CaseIterable {
         case .pulse: Self.shortestFlashCycle
         case .flash: Self.shortestFlashCycle * 2
         case .sweep: Self.shortestFlashCycle
+        // A breath is calm: never quicker than one a second.
+        case .breath: Self.shortestFlashCycle * 2
         }
     }
 }

Packages/macOS/CmuxNext/Sources/CmuxNextDesign/Motion/MotionTunables.swift

@@ -89,6 +89,7 @@ public nonisolated enum MotionTunables {
         .pulse: (1.8, "One cycle of the agent-waiting pulse."),
         .flash: (1, "Pane attention flash (two blinks; at least 1 s, the 2 Hz cap)."),
         .sweep: (1.3, "One pass of an unmeasured progress bar's segment (the update card while checking)."),
+        .breath: (2.4, "One breath of the agent-working dot (working look Breathing Dot). Web pages breathe on their own --cmux-breath-period."),
     ]
 
     static let loops: [MotionLoop: Tunable<Double>] = Dictionary(uniqueKeysWithValues: MotionLoop.allCases.map { loop in