feat(telemetry): implement real-time disk I/O throughput and IOPS provider (fixes #10)

MacMonitor.xcodeproj/project.pbxproj

@@ -7,17 +7,21 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		0A7117B3B7CC7112F2527574 /* MMPowerTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 02F5FDE260999C39E978D849 /* MMPowerTelemetryProvider.m */; };
 		160334CC765E091A7CBE21AA /* MMCPULoadTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4CE92B1A8D7FDBB6499448E1 /* MMCPULoadTests.swift */; };
 		1879A3DCF6E305D7F2CD472E /* CoreFoundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2345555FF9780B02A90CC7A9 /* CoreFoundation.framework */; };
 		1B15F48F6B19E9EA4556ECD5 /* MMStorageTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 78325870C7CD8312AECA2236 /* MMStorageTests.swift */; };
 		1B3F1C8ABF0ADFAA290FF6F6 /* MMSMCParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 375AA781A2AA0A20B119C7B7 /* MMSMCParser.m */; };
 		3C0AC14F803C813287D8A663 /* IOKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 007F48A5A599AB4E8D216D16 /* IOKit.framework */; };
 		4419FE7554489B23976E2970 /* MMCPULoadProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = D68FC8100D08DB6202F46339 /* MMCPULoadProvider.m */; };
+		57BA02AE1CE24DBD02BD03A4 /* MMComponentThermalTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B288C7402E2C00E75F8CD016 /* MMComponentThermalTests.swift */; };
 		6201FD599FED061F6C736E8B /* MMMemoryTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 099DCF7EF03A58ADA40A94A1 /* MMMemoryTests.swift */; };
 		655366D7066478A02EDA91BB /* MMFanTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = C9ED8F75E082D4F8AC2FF2F5 /* MMFanTelemetryProvider.m */; };
 		87818E46CEA5145A8215D0E3 /* MMCPUThermalTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0F2BD3777A674DC4EB442890 /* MMCPUThermalTests.swift */; };
 		87A9E18362486D0D385BBC4A /* MMCPUThermalProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 62C377EFD025D6A6B5563E77 /* MMCPUThermalProvider.m */; };
 		88387CDAE2AC1CC74EF89B57 /* MacMonitorApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = ADEA6BD38BA8D887B1DB64A9 /* MacMonitorApp.swift */; };
+		925245C5B5F8D8DA3C89C4BA /* MMComponentThermalProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = C65F5835516BC2A65BCE25D2 /* MMComponentThermalProvider.m */; };
+		9B5C651AD2AF7DE2738F0C44 /* MMPowerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D48698681374BD25B980C000 /* MMPowerTests.swift */; };
 		9BCE74C5454F81EF80492E75 /* MacMonitorTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2EC3EDFCD5C50CB352FCED87 /* MacMonitorTests.swift */; };
 		A7609CE56D49EC3419987468 /* SystemTelemetryStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4B4E94FB2886C60D5548A2A /* SystemTelemetryStore.swift */; };
 		A9FCAEC0BF27A419DB148C4A /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E142AE61F9B87757997870DD /* ContentView.swift */; };
@@ -42,6 +46,8 @@
 /* Begin PBXFileReference section */
 		007F48A5A599AB4E8D216D16 /* IOKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = IOKit.framework; path = System/Library/Frameworks/IOKit.framework; sourceTree = SDKROOT; };
 		0130BD1E18972DF9E2955334 /* MMMemoryTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMMemoryTelemetryProvider.h; sourceTree = "<group>"; };
+		02F5FDE260999C39E978D849 /* MMPowerTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMPowerTelemetryProvider.m; sourceTree = "<group>"; };
+		09475741B5D0D4B89B863C3D /* MMComponentThermalProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMComponentThermalProvider.h; sourceTree = "<group>"; };
 		099DCF7EF03A58ADA40A94A1 /* MMMemoryTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMMemoryTests.swift; sourceTree = "<group>"; };
 		0F2BD3777A674DC4EB442890 /* MMCPUThermalTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMCPUThermalTests.swift; sourceTree = "<group>"; };
 		1AD9EEE571CD904BBCD1C96B /* MMSMCParser.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMSMCParser.h; sourceTree = "<group>"; };
@@ -66,7 +72,11 @@
 		940D608A1AF80F75584E744E /* MMSMCTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMSMCTests.swift; sourceTree = "<group>"; };
 		991AEEAF262F3C6BE930BC77 /* MMMemoryTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMMemoryTelemetryProvider.m; sourceTree = "<group>"; };
 		ADEA6BD38BA8D887B1DB64A9 /* MacMonitorApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MacMonitorApp.swift; sourceTree = "<group>"; };
+		B288C7402E2C00E75F8CD016 /* MMComponentThermalTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMComponentThermalTests.swift; sourceTree = "<group>"; };
+		C65F5835516BC2A65BCE25D2 /* MMComponentThermalProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMComponentThermalProvider.m; sourceTree = "<group>"; };
 		C9ED8F75E082D4F8AC2FF2F5 /* MMFanTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMFanTelemetryProvider.m; sourceTree = "<group>"; };
+		CBA91906CA8B7936CC82A36B /* MMPowerTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMPowerTelemetryProvider.h; sourceTree = "<group>"; };
+		D48698681374BD25B980C000 /* MMPowerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMPowerTests.swift; sourceTree = "<group>"; };
 		D68FC8100D08DB6202F46339 /* MMCPULoadProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMCPULoadProvider.m; sourceTree = "<group>"; };
 		D73CCC7B5E6BF1825EA68E2B /* MMCPUThermalProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMCPUThermalProvider.h; sourceTree = "<group>"; };
 		E142AE61F9B87757997870DD /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
@@ -147,12 +157,22 @@
 			path = CPU;
 			sourceTree = "<group>";
 		};
+		8B31CE7F9319FEC373E6CDC6 /* Power */ = {
+			isa = PBXGroup;
+			children = (
+				CBA91906CA8B7936CC82A36B /* MMPowerTelemetryProvider.h */,
+				02F5FDE260999C39E978D849 /* MMPowerTelemetryProvider.m */,
+			);
+			path = Power;
+			sourceTree = "<group>";
+		};
 		8BF79E3BCB76E7A1669DC930 /* Telemetry */ = {
 			isa = PBXGroup;
 			children = (
 				78383CED205BCA772701AE48 /* CPU */,
 				AD2995435E44FA3E1790A4F3 /* Fan */,
 				EE2F5EFC9DC33CEDA79A131F /* Memory */,
+				8B31CE7F9319FEC373E6CDC6 /* Power */,
 				B6EB3F6545276C40212C2992 /* Storage */,
 				DBDC37231C01F0A2D4A7FC73 /* Thermal */,
 			);
@@ -198,10 +218,12 @@
 			isa = PBXGroup;
 			children = (
 				2EC3EDFCD5C50CB352FCED87 /* MacMonitorTests.swift */,
+				B288C7402E2C00E75F8CD016 /* MMComponentThermalTests.swift */,
 				4CE92B1A8D7FDBB6499448E1 /* MMCPULoadTests.swift */,
 				0F2BD3777A674DC4EB442890 /* MMCPUThermalTests.swift */,
 				336CEE35A745F3C7E9F70F43 /* MMFanTests.swift */,
 				099DCF7EF03A58ADA40A94A1 /* MMMemoryTests.swift */,
+				D48698681374BD25B980C000 /* MMPowerTests.swift */,
 				940D608A1AF80F75584E744E /* MMSMCTests.swift */,
 				78325870C7CD8312AECA2236 /* MMStorageTests.swift */,
 			);
@@ -211,6 +233,8 @@
 		DBDC37231C01F0A2D4A7FC73 /* Thermal */ = {
 			isa = PBXGroup;
 			children = (
+				09475741B5D0D4B89B863C3D /* MMComponentThermalProvider.h */,
+				C65F5835516BC2A65BCE25D2 /* MMComponentThermalProvider.m */,
 				D73CCC7B5E6BF1825EA68E2B /* MMCPUThermalProvider.h */,
 				62C377EFD025D6A6B5563E77 /* MMCPUThermalProvider.m */,
 			);
@@ -324,8 +348,10 @@
 			files = (
 				160334CC765E091A7CBE21AA /* MMCPULoadTests.swift in Sources */,
 				87818E46CEA5145A8215D0E3 /* MMCPUThermalTests.swift in Sources */,
+				57BA02AE1CE24DBD02BD03A4 /* MMComponentThermalTests.swift in Sources */,
 				E6F2F695B8D3E7045967C082 /* MMFanTests.swift in Sources */,
 				6201FD599FED061F6C736E8B /* MMMemoryTests.swift in Sources */,
+				9B5C651AD2AF7DE2738F0C44 /* MMPowerTests.swift in Sources */,
 				EC9FA3E4A119277B89E73F8D /* MMSMCTests.swift in Sources */,
 				1B15F48F6B19E9EA4556ECD5 /* MMStorageTests.swift in Sources */,
 				9BCE74C5454F81EF80492E75 /* MacMonitorTests.swift in Sources */,
@@ -340,8 +366,10 @@
 				CD91FC663B19DA1FEA3D49D7 /* MMAppleSMCClient.m in Sources */,
 				4419FE7554489B23976E2970 /* MMCPULoadProvider.m in Sources */,
 				87A9E18362486D0D385BBC4A /* MMCPUThermalProvider.m in Sources */,
+				925245C5B5F8D8DA3C89C4BA /* MMComponentThermalProvider.m in Sources */,
 				655366D7066478A02EDA91BB /* MMFanTelemetryProvider.m in Sources */,
 				B9C2D6574E808B517BA34C83 /* MMMemoryTelemetryProvider.m in Sources */,
+				0A7117B3B7CC7112F2527574 /* MMPowerTelemetryProvider.m in Sources */,
 				1B3F1C8ABF0ADFAA290FF6F6 /* MMSMCParser.m in Sources */,
 				F2F7A141F2452EC1B4FB45D8 /* MMStorageTelemetryProvider.m in Sources */,
 				EAFAF5A10502D4ACC64F4720 /* MMTelemetryCoordinator.m in Sources */,

Sources/App/SystemTelemetryStore.swift

@@ -2,6 +2,87 @@ import Foundation
 import SwiftUI
 import Observation
 
+// MARK: - Typed Telemetry Models
+
+public struct CPULoadMetrics: Sendable {
+    public var systemLoad: Double = 0
+    public var userLoad: Double = 0
+    public var idleLoad: Double = 100
+    public var totalLoad: Double = 0
+    public var perCoreLoad: [Double] = []
+    public var cpuFrequencyMHz: Double = 0
+    public var isThrottled: Bool = false
+}
+
+public struct MemoryMetrics: Sendable {
+    public var totalBytes: UInt64 = 0
+    public var usedBytes: UInt64 = 0
+    public var freeBytes: UInt64 = 0
+    public var activeBytes: UInt64 = 0
+    public var inactiveBytes: UInt64 = 0
+    public var wiredBytes: UInt64 = 0
+    public var compressedBytes: UInt64 = 0
+    public var swapTotalBytes: UInt64 = 0
+    public var swapUsedBytes: UInt64 = 0
+    public var utilizationPercentage: Double = 0
+    public var pressureLevel: String = "Normal"
+}
+
+public struct StorageVolumeItem: Identifiable, Sendable {
+    public var id: String { mountPoint }
+    public let mountPoint: String
+    public let volumeName: String
+    public let fileSystem: String
+    public let totalBytes: UInt64
+    public let freeBytes: UInt64
+    public let usedBytes: UInt64
+    public let usedPercentage: Double
+    public let isReadOnly: Bool
+}
+
+public struct CPUThermalMetrics: Sendable {
+    public var packageTemperature: Double = 0
+    public var averageCoreTemperature: Double = 0
+    public var peakCoreTemperature: Double = 0
+    public var coreTemperatures: [(index: Int, key: String, temperature: Double)] = []
+    public var thermalPressureState: String = "Nominal"
+    public var isThrottling: Bool = false
+}
+
+public struct FanTelemetryItem: Identifiable, Sendable {
+    public var id: Int { index }
+    public let index: Int
+    public let name: String
+    public let currentRPM: Double
+    public let minRPM: Double
+    public let maxRPM: Double
+    public let targetRPM: Double
+    public let utilization: Double
+}
+
+public struct ComponentThermalItem: Identifiable, Sendable {
+    public var id: String { key }
+    public let key: String
+    public let name: String
+    public let category: String
+    public let temperature: Double
+}
+
+public struct PowerMetrics: Sendable {
+    public var systemTotalWatts: Double = 0
+    public var cpuWatts: Double = 0
+    public var gpuWatts: Double = 0
+    public var memoryWatts: Double = 0
+    public var cpuVoltage: Double = 0
+    public var cpuCurrent: Double = 0
+    public var powerSource: String = "AC Power"
+    public var isCharging: Bool = false
+    public var batteryLevel: Double = 100.0
+    public var sensorReadings: [(key: String, name: String, value: Double, unit: String)] = []
+}
+
+// MARK: - SystemTelemetryStore
+
 @Observable
 @MainActor
 public final class SystemTelemetryStore {
@@ -14,6 +95,15 @@ public final class SystemTelemetryStore {
     /// Raw snapshots organized by provider identifier
     public private(set) var latestSnapshot: [String: [String: Any]] = [:]
     
+    /// Structured Telemetry Metrics
+    public private(set) var cpuLoad = CPULoadMetrics()
+    public private(set) var memory = MemoryMetrics()
+    public private(set) var storageVolumes: [StorageVolumeItem] = []
+    public private(set) var cpuThermal = CPUThermalMetrics()
+    public private(set) var fans: [FanTelemetryItem] = []
+    public private(set) var componentTemps: [ComponentThermalItem] = []
+    public private(set) var power = PowerMetrics()
+    
     /// System identification
     public let hostModel: String
     public let osVersion: String
@@ -30,15 +120,154 @@ public final class SystemTelemetryStore {
         self.physicalCpuCount = SystemTelemetryStore.readSysctlInt("hw.physicalcpu") ?? 1
         self.logicalCpuCount = SystemTelemetryStore.readSysctlInt("hw.logicalcpu") ?? 1
         
+        registerDefaultProviders()
         setupCoordinator()
     }
     
+    private func registerDefaultProviders() {
+        // Register all Primary System & Thermal Telemetry providers (M2)
+        coordinator.register(MMCPULoadProvider())
+        coordinator.register(MMMemoryTelemetryProvider())
+        coordinator.register(MMStorageTelemetryProvider())
+        coordinator.register(MMCPUThermalProvider())
+        coordinator.register(MMFanTelemetryProvider())
+        coordinator.register(MMComponentThermalProvider())
+        coordinator.register(MMPowerTelemetryProvider())
+    }
+    
     private func setupCoordinator() {
         coordinator.sampleInterval = self.sampleInterval
         coordinator.snapshotHandler = { [weak self] snapshot in
             guard let self else { return }
             self.latestSnapshot = snapshot
             self.lastUpdateTimestamp = Date()
+            self.decodeSnapshot(snapshot)
+        }
+    }
+    
+    private func decodeSnapshot(_ snapshot: [String: [String: Any]]) {
+        // 1. CPU Load
+        if let cpuDict = snapshot["com.i3omb.macmonitor.telemetry.cpu"] {
+            var m = CPULoadMetrics()
+            m.systemLoad = (cpuDict["systemLoad"] as? NSNumber)?.doubleValue ?? 0
+            m.userLoad = (cpuDict["userLoad"] as? NSNumber)?.doubleValue ?? 0
+            m.idleLoad = (cpuDict["idleLoad"] as? NSNumber)?.doubleValue ?? 100
+            m.totalLoad = (cpuDict["totalLoad"] as? NSNumber)?.doubleValue ?? 0
+            if let perCore = cpuDict["perCoreLoad"] as? [NSNumber] {
+                m.perCoreLoad = perCore.map { $0.doubleValue }
+            }
+            m.cpuFrequencyMHz = (cpuDict["cpuFrequencyMHz"] as? NSNumber)?.doubleValue ?? 0
+            m.isThrottled = (cpuDict["isThrottled"] as? NSNumber)?.boolValue ?? false
+            self.cpuLoad = m
+        }
+        
+        // 2. Memory
+        if let memDict = snapshot["com.i3omb.macmonitor.telemetry.memory"] {
+            var m = MemoryMetrics()
+            m.totalBytes = (memDict["totalBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.usedBytes = (memDict["usedBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.freeBytes = (memDict["freeBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.activeBytes = (memDict["activeBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.inactiveBytes = (memDict["inactiveBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.wiredBytes = (memDict["wiredBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.compressedBytes = (memDict["compressedBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.swapTotalBytes = (memDict["swapTotalBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.swapUsedBytes = (memDict["swapUsedBytes"] as? NSNumber)?.uint64Value ?? 0
+            m.utilizationPercentage = (memDict["utilizationPercentage"] as? NSNumber)?.doubleValue ?? 0
+            m.pressureLevel = memDict["pressureLevel"] as? String ?? "Normal"
+            self.memory = m
+        }
+        
+        // 3. Storage
+        if let stgDict = snapshot["com.i3omb.macmonitor.telemetry.storage"],
+           let volArray = stgDict["volumes"] as? [[String: Any]] {
+            self.storageVolumes = volArray.compactMap { dict in
+                guard let mount = dict["mountPoint"] as? String else { return nil }
+                return StorageVolumeItem(
+                    mountPoint: mount,
+                    volumeName: dict["volumeName"] as? String ?? mount,
+                    fileSystem: dict["fileSystem"] as? String ?? "APFS",
+                    totalBytes: (dict["totalBytes"] as? NSNumber)?.uint64Value ?? 0,
+                    freeBytes: (dict["freeBytes"] as? NSNumber)?.uint64Value ?? 0,
+                    usedBytes: (dict["usedBytes"] as? NSNumber)?.uint64Value ?? 0,
+                    usedPercentage: (dict["usedPercentage"] as? NSNumber)?.doubleValue ?? 0,
+                    isReadOnly: (dict["isReadOnly"] as? NSNumber)?.boolValue ?? false
+                )
+            }
+        }
+        
+        // 4. CPU Thermal
+        if let thDict = snapshot["com.i3omb.macmonitor.telemetry.thermal.cpu"] {
+            var m = CPUThermalMetrics()
+            m.packageTemperature = (thDict["packageTemperature"] as? NSNumber)?.doubleValue ?? 0
+            m.averageCoreTemperature = (thDict["averageCoreTemperature"] as? NSNumber)?.doubleValue ?? 0
+            m.peakCoreTemperature = (thDict["peakCoreTemperature"] as? NSNumber)?.doubleValue ?? 0
+            m.thermalPressureState = thDict["thermalPressureState"] as? String ?? "Nominal"
+            m.isThrottling = (thDict["isThrottling"] as? NSNumber)?.boolValue ?? false
+            if let coresList = thDict["coreTemperatures"] as? [[String: Any]] {
+                m.coreTemperatures = coresList.compactMap { d in
+                    let idx = (d["coreIndex"] as? NSNumber)?.intValue ?? 0
+                    let key = d["key"] as? String ?? "TC\(idx)C"
+                    let temp = (d["temperature"] as? NSNumber)?.doubleValue ?? 0
+                    return (index: idx, key: key, temperature: temp)
+                }
+            }
+            self.cpuThermal = m
+        }
+        
+        // 5. Fans
+        if let fanDict = snapshot["com.i3omb.macmonitor.telemetry.fan"],
+           let fanArray = fanDict["fans"] as? [[String: Any]] {
+            self.fans = fanArray.compactMap { d in
+                let idx = (d["index"] as? NSNumber)?.intValue ?? 0
+                return FanTelemetryItem(
+                    index: idx,
+                    name: d["name"] as? String ?? "Fan \(idx + 1)",
+                    currentRPM: (d["currentRPM"] as? NSNumber)?.doubleValue ?? 0,
+                    minRPM: (d["minRPM"] as? NSNumber)?.doubleValue ?? 0,
+                    maxRPM: (d["maxRPM"] as? NSNumber)?.doubleValue ?? 0,
+                    targetRPM: (d["targetRPM"] as? NSNumber)?.doubleValue ?? 0,
+                    utilization: (d["utilization"] as? NSNumber)?.doubleValue ?? 0
+                )
+            }
+        }
+        
+        // 6. Component Thermals
+        if let compDict = snapshot["com.i3omb.macmonitor.telemetry.thermal.components"],
+           let compArray = compDict["components"] as? [[String: Any]] {
+            self.componentTemps = compArray.compactMap { d in
+                guard let key = d["key"] as? String else { return nil }
+                return ComponentThermalItem(
+                    key: key,
+                    name: d["name"] as? String ?? key,
+                    category: d["category"] as? String ?? "Other",
+                    temperature: (d["temperature"] as? NSNumber)?.doubleValue ?? 0
+                )
+            }
+        }
+        
+        // 7. Power
+        if let pwrDict = snapshot["com.i3omb.macmonitor.telemetry.power"] {
+            var m = PowerMetrics()
+            m.systemTotalWatts = (pwrDict["systemTotalWatts"] as? NSNumber)?.doubleValue ?? 0
+            m.cpuWatts = (pwrDict["cpuWatts"] as? NSNumber)?.doubleValue ?? 0
+            m.gpuWatts = (pwrDict["gpuWatts"] as? NSNumber)?.doubleValue ?? 0
+            m.memoryWatts = (pwrDict["memoryWatts"] as? NSNumber)?.doubleValue ?? 0
+            m.cpuVoltage = (pwrDict["cpuVoltage"] as? NSNumber)?.doubleValue ?? 0
+            m.cpuCurrent = (pwrDict["cpuCurrent"] as? NSNumber)?.doubleValue ?? 0
+            m.powerSource = pwrDict["powerSource"] as? String ?? "AC Power"
+            m.isCharging = (pwrDict["isCharging"] as? NSNumber)?.boolValue ?? false
+            m.batteryLevel = (pwrDict["batteryLevel"] as? NSNumber)?.doubleValue ?? 100.0
+            if let sensorList = pwrDict["sensors"] as? [[String: Any]] {
+                m.sensorReadings = sensorList.compactMap { d in
+                    guard let k = d["key"] as? String else { return nil }
+                    let n = d["name"] as? String ?? k
+                    let v = (d["value"] as? NSNumber)?.doubleValue ?? 0
+                    let u = d["unit"] as? String ?? ""
+                    return (key: k, name: n, value: v, unit: u)
+                }
+            }
+            self.power = m
         }
     }
     

Sources/Bridging/MacMonitor-Bridging-Header.h

@@ -18,5 +18,9 @@
 #import "MMCPUThermalProvider.h"
 #import "MMFanTelemetryProvider.h"
 #import "MMComponentThermalProvider.h"
+#import "MMPowerTelemetryProvider.h"
+#import "MMKernelTelemetryProvider.h"
+#import "MMLoadAverageProvider.h"
+#import "MMDiskIOProvider.h"
 
 #endif /* MacMonitor_Bridging_Header_h */

Sources/Hardware/AppleSMC/MMSMCParser.m

@@ -40,6 +40,13 @@
            (uint32_t)bytes[3];
 }
 
+static int hexDigitValue(unichar c) {
+    if (c >= '0' && c <= '9') return c - '0';
+    if (c >= 'a' && c <= 'f') return c - 'a' + 10;
+    if (c >= 'A' && c <= 'F') return c - 'A' + 10;
+    return -1;
+}
+
 + (nullable NSNumber *)decodeValueWithDataType:(NSString *)dataType bytes:(const uint8_t *)bytes size:(NSUInteger)size {
     if (!bytes || size == 0) return nil;
     
@@ -49,7 +56,7 @@
         if (size >= 2) return @([self decodeSP78:bytes]);
     } else if ([trimmedType isEqualToString:@"fpe2"]) {
         if (size >= 2) return @([self decodeFPE2:bytes]);
-    } else if ([trimmedType isEqualToString:@"flt"]) {
+    } else if ([trimmedType isEqualToString:@"flt"] || [trimmedType isEqualToString:@"ioft"]) {
         if (size >= 4) return @([self decodeFLT:bytes]);
     } else if ([trimmedType isEqualToString:@"ui8"]) {
         if (size >= 1) return @([self decodeUI8:bytes]);
@@ -59,6 +66,18 @@
         if (size >= 4) return @([self decodeUI32:bytes]);
     } else if ([trimmedType isEqualToString:@"flag"]) {
         if (size >= 1) return @(bytes[0] != 0);
+    } else if (trimmedType.length == 4 && [trimmedType hasPrefix:@"sp"] && size >= 2) {
+        int fracBits = hexDigitValue([trimmedType characterAtIndex:3]);
+        if (fracBits >= 0 && fracBits <= 15) {
+            int16_t raw = (int16_t)(((uint16_t)bytes[0] << 8) | (uint16_t)bytes[1]);
+            return @((float)raw / (float)(1 << fracBits));
+        }
+    } else if (trimmedType.length == 4 && [trimmedType hasPrefix:@"fp"] && size >= 2) {
+        int fracBits = hexDigitValue([trimmedType characterAtIndex:3]);
+        if (fracBits >= 0 && fracBits <= 15) {
+            uint16_t raw = ((uint16_t)bytes[0] << 8) | (uint16_t)bytes[1];
+            return @((float)raw / (float)(1 << fracBits));
+        }
     }
     
     return nil;

Sources/Telemetry/Kernel/MMKernelTelemetryProvider.h

@@ -0,0 +1,30 @@
+#ifndef MMKernelTelemetryProvider_h
+#define MMKernelTelemetryProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMKernelTelemetryProvider
+ * Samples low-level Mach kernel performance counters: context switches, system calls,
+ * page faults (soft, COW, zero-fill), pageins/pageouts, and computes instantaneous rates per second.
+ */
+@interface MMKernelTelemetryProvider : NSObject <MMTelemetryProvider>
+
+- (instancetype)init;
+
+/**
+ * Static calculator method for deterministic unit testing.
+ * Computes event rates per second based on previous and current cumulative counters over delta time.
+ */
++ (NSDictionary<NSString *, id> *)calculateRatesWithCurrentCounters:(NSDictionary<NSString *, NSNumber *> *)current
+                                                   previousCounters:(nullable NSDictionary<NSString *, NSNumber *> *)previous
+                                                          timeDelta:(NSTimeInterval)timeDelta;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMKernelTelemetryProvider_h */

Sources/Telemetry/Kernel/MMKernelTelemetryProvider.m

@@ -0,0 +1,131 @@
+#import "MMKernelTelemetryProvider.h"
+#import <mach/mach.h>
+#import <mach/mach_time.h>
+#import <libproc.h>
+#import <os/lock.h>
+
+@interface MMKernelTelemetryProvider () {
+    os_unfair_lock _lock;
+    NSDictionary<NSString *, NSNumber *> *_previousCounters;
+    uint64_t _previousTimestamp;
+    mach_timebase_info_data_t _timebase;
+}
+@end
+
+@implementation MMKernelTelemetryProvider
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        _lock = OS_UNFAIR_LOCK_INIT;
+        _previousCounters = nil;
+        _previousTimestamp = 0;
+        mach_timebase_info(&_timebase);
+    }
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainSystem;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.kernel.counters";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
++ (NSDictionary<NSString *, id> *)calculateRatesWithCurrentCounters:(NSDictionary<NSString *, NSNumber *> *)current
+                                                   previousCounters:(nullable NSDictionary<NSString *, NSNumber *> *)previous
+                                                          timeDelta:(NSTimeInterval)timeDelta {
+    NSMutableDictionary<NSString *, id> *result = [NSMutableDictionary dictionary];
+    
+    // Copy all current cumulative counters into result
+    [current enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSNumber *val, BOOL *stop) {
+        result[[@"cumulative_" stringByAppendingString:key]] = val;
+    }];
+    
+    NSArray<NSString *> *rateKeys = @[
+        @"contextSwitches", @"syscalls", @"pageFaults", @"cowFaults",
+        @"zeroFills", @"pageins", @"pageouts", @"decompressions", @"compressions"
+    ];
+    
+    for (NSString *key in rateKeys) {
+        double currentVal = [current[key] doubleValue];
+        double prevVal = previous ? [previous[key] doubleValue] : currentVal;
+        double delta = (currentVal >= prevVal) ? (currentVal - prevVal) : 0.0;
+        double rate = (timeDelta > 0.0001) ? (delta / timeDelta) : 0.0;
+        result[[key stringByAppendingString:@"Rate"]] = @(rate);
+    }
+    
+    result[@"timeDelta"] = @(timeDelta);
+    return result;
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    uint64_t now = mach_absolute_time();
+    
+    // 1. Query Mach VM Statistics for page faults, COW, zero fills, pageins/outs
+    vm_statistics64_data_t vmStats;
+    mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
+    kern_return_t kr = host_statistics64(mach_host_self(), HOST_VM_INFO64, (host_info64_t)&vmStats, &count);
+    if (kr != KERN_SUCCESS) {
+        if (error) {
+            *error = [NSError errorWithDomain:@"com.i3omb.macmonitor.kernel"
+                                         code:kr
+                                     userInfo:@{NSLocalizedDescriptionKey: @"Failed to query host_statistics64"}];
+        }
+        return nil;
+    }
+    
+    // 2. Query process table for cumulative context switches and system calls
+    int pids[4096];
+    int bytes = proc_listpids(PROC_ALL_PIDS, 0, pids, sizeof(pids));
+    int pidCount = bytes / sizeof(int);
+    
+    uint64_t totalCSW = 0;
+    uint64_t totalSyscalls = 0;
+    
+    for (int i = 0; i < pidCount; i++) {
+        if (pids[i] <= 0) continue;
+        struct proc_taskinfo ti;
+        if (proc_pidinfo(pids[i], PROC_PIDTASKINFO, 0, &ti, sizeof(ti)) == sizeof(ti)) {
+            totalCSW += ti.pti_csw;
+            totalSyscalls += (uint64_t)ti.pti_syscalls_unix + (uint64_t)ti.pti_syscalls_mach;
+        }
+    }
+    
+    NSDictionary<NSString *, NSNumber *> *currentCounters = @{
+        @"contextSwitches": @(totalCSW),
+        @"syscalls": @(totalSyscalls),
+        @"pageFaults": @(vmStats.faults),
+        @"cowFaults": @(vmStats.cow_faults),
+        @"zeroFills": @(vmStats.zero_fill_count),
+        @"pageins": @(vmStats.pageins),
+        @"pageouts": @(vmStats.pageouts),
+        @"decompressions": @(vmStats.decompressions),
+        @"compressions": @(vmStats.compressions)
+    };
+    
+    os_unfair_lock_lock(&_lock);
+    NSDictionary<NSString *, NSNumber *> *prev = _previousCounters;
+    uint64_t prevTime = _previousTimestamp;
+    
+    _previousCounters = currentCounters;
+    _previousTimestamp = now;
+    os_unfair_lock_unlock(&_lock);
+    
+    NSTimeInterval timeDelta = 1.0;
+    if (prevTime > 0) {
+        uint64_t elapsed = now - prevTime;
+        timeDelta = (double)elapsed * _timebase.numer / _timebase.denom / 1e9;
+    }
+    
+    return [MMKernelTelemetryProvider calculateRatesWithCurrentCounters:currentCounters
+                                                       previousCounters:prev
+                                                              timeDelta:timeDelta];
+}
+
+@end

Sources/Telemetry/Power/MMPowerTelemetryProvider.h

@@ -0,0 +1,45 @@
+#ifndef MMPowerTelemetryProvider_h
+#define MMPowerTelemetryProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+#import "MMAppleSMCClient.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMPowerTelemetryProvider
+ * Samples system power draw, CPU/GPU package wattage, rail voltages, and currents
+ * via AppleSMC and AppleSmartBattery IOKit interfaces.
+ */
+@interface MMPowerTelemetryProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, strong, readonly) MMAppleSMCClient *smcClient;
+@property (nonatomic, readonly) NSArray<NSString *> *discoveredPowerKeys;
+@property (nonatomic, readonly) NSArray<NSString *> *discoveredVoltageKeys;
+@property (nonatomic, readonly) NSArray<NSString *> *discoveredCurrentKeys;
+
+- (instancetype)init;
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client;
+
+/**
+ * Friendly name for power, voltage, and current SMC keys.
+ */
++ (NSString *)humanReadableNameForKey:(NSString *)key;
+
+/**
+ * Unit of measurement for SMC key ("W", "V", "A").
+ */
++ (NSString *)unitForKey:(NSString *)key;
+
+/**
+ * Pure calculator method for deterministic unit testing.
+ */
++ (NSDictionary<NSString *, id> *)calculatePowerMetricsWithReadings:(NSDictionary<NSString *, NSNumber *> *)readings
+                                                        batteryInfo:(nullable NSDictionary<NSString *, id> *)batteryInfo;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMPowerTelemetryProvider_h */

Sources/Telemetry/Power/MMPowerTelemetryProvider.m

@@ -0,0 +1,314 @@
+#import "MMPowerTelemetryProvider.h"
+#import <IOKit/IOKitLib.h>
+#import <IOKit/ps/IOPowerSources.h>
+#import <IOKit/ps/IOPSKeys.h>
+
+@interface MMPowerTelemetryProvider () {
+    MMAppleSMCClient *_smcClient;
+    NSMutableArray<NSString *> *_discoveredPowerKeys;
+    NSMutableArray<NSString *> *_discoveredVoltageKeys;
+    NSMutableArray<NSString *> *_discoveredCurrentKeys;
+    BOOL _probed;
+}
+@end
+
+@implementation MMPowerTelemetryProvider
+
+- (instancetype)init {
+    return [self initWithSMCClient:[MMAppleSMCClient sharedClient]];
+}
+
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client {
+    self = [super init];
+    if (self) {
+        _smcClient = client;
+        _discoveredPowerKeys = [NSMutableArray array];
+        _discoveredVoltageKeys = [NSMutableArray array];
+        _discoveredCurrentKeys = [NSMutableArray array];
+        [self probeSensors];
+    }
+    return self;
+}
+
+- (void)probeSensors {
+    if (!_smcClient.isAvailable) return;
+    
+    NSArray<NSString *> *powerCandidates = @[
+        @"PSTR", @"PDTR", @"PCPR", @"PCTR", @"PC0C", @"PCPT",
+        @"PG0R", @"PGTR", @"PMSR", @"PM0R", @"PCPC"
+    ];
+    
+    NSArray<NSString *> *voltageCandidates = @[
+        @"VC0C", @"VD0R", @"VN0C", @"VM0R", @"VP0R"
+    ];
+    
+    NSArray<NSString *> *currentCandidates = @[
+        @"IC0C", @"ID0R", @"IG0C", @"IM0R"
+    ];
+    
+    [_discoveredPowerKeys removeAllObjects];
+    for (NSString *key in powerCandidates) {
+        NSNumber *val = [_smcClient readNumericValueForKey:key error:nil];
+        if (val && [val doubleValue] > 0.0 && [val doubleValue] < 5000.0) {
+            [_discoveredPowerKeys addObject:key];
+        }
+    }
+    
+    [_discoveredVoltageKeys removeAllObjects];
+    for (NSString *key in voltageCandidates) {
+        NSNumber *val = [_smcClient readNumericValueForKey:key error:nil];
+        if (val && [val doubleValue] > 0.0) {
+            [_discoveredVoltageKeys addObject:key];
+        }
+    }
+    
+    [_discoveredCurrentKeys removeAllObjects];
+    for (NSString *key in currentCandidates) {
+        NSNumber *val = [_smcClient readNumericValueForKey:key error:nil];
+        if (val && [val doubleValue] > 0.0) {
+            [_discoveredCurrentKeys addObject:key];
+        }
+    }
+    
+    _probed = YES;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainPower;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.power";
+}
+
+- (BOOL)isAvailable {
+    return _smcClient.isAvailable;
+}
+
+- (MMAppleSMCClient *)smcClient {
+    return _smcClient;
+}
+
+- (NSArray<NSString *> *)discoveredPowerKeys {
+    return [_discoveredPowerKeys copy];
+}
+
+- (NSArray<NSString *> *)discoveredVoltageKeys {
+    return [_discoveredVoltageKeys copy];
+}
+
+- (NSArray<NSString *> *)discoveredCurrentKeys {
+    return [_discoveredCurrentKeys copy];
+}
+
++ (NSString *)unitForKey:(NSString *)key {
+    if ([key hasPrefix:@"P"]) return @"W";
+    if ([key hasPrefix:@"V"]) return @"V";
+    if ([key hasPrefix:@"I"]) return @"A";
+    return @"";
+}
+
++ (NSString *)humanReadableNameForKey:(NSString *)key {
+    static NSDictionary<NSString *, NSString *> *names = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        names = @{
+            @"PSTR": @"Total System Power",
+            @"PDTR": @"DC-In Total Power",
+            @"PCPR": @"CPU Package Power",
+            @"PCTR": @"CPU Total Power",
+            @"PC0C": @"CPU Core Power",
+            @"PCPT": @"CPU Package Total Power",
+            @"PG0R": @"GPU 0 Power",
+            @"PGTR": @"GPU Total Power",
+            @"PMSR": @"Memory Subsystem Power",
+            @"PM0R": @"Memory Rail Power",
+            @"PCPC": @"Power Supply In / AC",
+            @"VC0C": @"CPU Core Voltage",
+            @"VD0R": @"DC-In Rail Voltage",
+            @"VN0C": @"PCH Rail Voltage",
+            @"VM0R": @"Memory Rail Voltage",
+            @"VP0R": @"Power Supply Voltage",
+            @"IC0C": @"CPU Core Current",
+            @"ID0R": @"DC-In Rail Current",
+            @"IG0C": @"GPU Rail Current",
+            @"IM0R": @"Memory Rail Current"
+        };
+    });
+    
+    NSString *match = names[key];
+    return match ?: key;
+}
+
++ (NSDictionary<NSString *, id> *)calculatePowerMetricsWithReadings:(NSDictionary<NSString *, NSNumber *> *)readings
+                                                        batteryInfo:(nullable NSDictionary<NSString *, id> *)batteryInfo {
+    // Determine system total power
+    double systemTotal = 0.0;
+    if (readings[@"PSTR"]) {
+        systemTotal = [readings[@"PSTR"] doubleValue];
+    } else if (readings[@"PDTR"]) {
+        systemTotal = [readings[@"PDTR"] doubleValue];
+    } else if (batteryInfo[@"batteryWatts"]) {
+        systemTotal = [batteryInfo[@"batteryWatts"] doubleValue];
+    }
+    
+    // CPU wattage
+    double cpuWatts = 0.0;
+    if (readings[@"PCPR"]) {
+        cpuWatts = [readings[@"PCPR"] doubleValue];
+    } else if (readings[@"PCTR"]) {
+        cpuWatts = [readings[@"PCTR"] doubleValue];
+    } else if (readings[@"PC0C"]) {
+        cpuWatts = [readings[@"PC0C"] doubleValue];
+    } else if (readings[@"PCPT"]) {
+        cpuWatts = [readings[@"PCPT"] doubleValue];
+    }
+    
+    // Voltage & Current
+    double cpuVoltage = readings[@"VC0C"] ? [readings[@"VC0C"] doubleValue] : 0.0;
+    double cpuCurrent = readings[@"IC0C"] ? [readings[@"IC0C"] doubleValue] : 0.0;
+    
+    // Fallback: calculate cpuWatts from V * I if SMC didn't provide direct wattage
+    if (cpuWatts == 0.0 && cpuVoltage > 0.0 && cpuCurrent > 0.0) {
+        cpuWatts = cpuVoltage * cpuCurrent;
+    }
+    
+    // GPU wattage
+    double gpuWatts = 0.0;
+    if (readings[@"PG0R"]) {
+        gpuWatts = [readings[@"PG0R"] doubleValue];
+    } else if (readings[@"PGTR"]) {
+        gpuWatts = [readings[@"PGTR"] doubleValue];
+    }
+    
+    // Memory wattage
+    double memoryWatts = 0.0;
+    if (readings[@"PMSR"]) {
+        memoryWatts = [readings[@"PMSR"] doubleValue];
+    } else if (readings[@"PM0R"]) {
+        memoryWatts = [readings[@"PM0R"] doubleValue];
+    }
+    
+    // Collect all individual sensor entries
+    NSMutableArray<NSDictionary<NSString *, id> *> *sensors = [NSMutableArray arrayWithCapacity:readings.count];
+    NSArray<NSString *> *sortedKeys = [readings.allKeys sortedArrayUsingSelector:@selector(compare:)];
+    for (NSString *k in sortedKeys) {
+        double val = [readings[k] doubleValue];
+        [sensors addObject:@{
+            @"key": k,
+            @"name": [self humanReadableNameForKey:k],
+            @"value": @(val),
+            @"unit": [self unitForKey:k]
+        }];
+    }
+    
+    NSString *powerSource = batteryInfo[@"powerSource"] ?: @"AC Power";
+    BOOL isCharging = [batteryInfo[@"isCharging"] boolValue];
+    double batteryLevel = [batteryInfo[@"batteryLevel"] doubleValue];
+    
+    return @{
+        @"systemTotalWatts": @(systemTotal),
+        @"cpuWatts": @(cpuWatts),
+        @"gpuWatts": @(gpuWatts),
+        @"memoryWatts": @(memoryWatts),
+        @"cpuVoltage": @(cpuVoltage),
+        @"cpuCurrent": @(cpuCurrent),
+        @"powerSource": powerSource,
+        @"isCharging": @(isCharging),
+        @"batteryLevel": @(batteryLevel),
+        @"sensors": sensors
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleBatteryInfo {
+    CFTypeRef psInfo = IOPSCopyPowerSourcesInfo();
+    if (!psInfo) return nil;
+    
+    CFArrayRef psList = IOPSCopyPowerSourcesList(psInfo);
+    if (!psList) {
+        CFRelease(psInfo);
+        return nil;
+    }
+    
+    NSString *stateStr = @"AC Power";
+    BOOL isCharging = NO;
+    double capacity = 100.0;
+    
+    if (CFArrayGetCount(psList) > 0) {
+        CFTypeRef ps = CFArrayGetValueAtIndex(psList, 0);
+        CFDictionaryRef desc = IOPSGetPowerSourceDescription(psInfo, ps);
+        if (desc) {
+            NSDictionary *dict = (__bridge NSDictionary *)desc;
+            stateStr = dict[@"Power Source State"] ?: @"AC Power";
+            isCharging = [dict[@"Is Charging"] boolValue];
+            if (dict[@"Current Capacity"]) {
+                capacity = [dict[@"Current Capacity"] doubleValue];
+            }
+        }
+    }
+    CFRelease(psList);
+    CFRelease(psInfo);
+    
+    // Sample AppleSmartBattery for instantaneous voltage and current
+    double batteryWatts = 0.0;
+    double batteryVoltage = 0.0;
+    double batteryAmperage = 0.0;
+    
+    io_service_t service = IOServiceGetMatchingService(kIOMainPortDefault, IOServiceMatching("AppleSmartBattery"));
+    if (service != IO_OBJECT_NULL) {
+        CFMutableDictionaryRef props = NULL;
+        if (IORegistryEntryCreateCFProperties(service, &props, kCFAllocatorDefault, 0) == KERN_SUCCESS && props) {
+            NSDictionary *dict = (__bridge NSDictionary *)props;
+            double v_mV = [dict[@"Voltage"] doubleValue];
+            double a_mA = dict[@"InstantAmperage"] ? [dict[@"InstantAmperage"] doubleValue] : [dict[@"Amperage"] doubleValue];
+            
+            batteryVoltage = v_mV / 1000.0;
+            batteryAmperage = fabs(a_mA) / 1000.0;
+            batteryWatts = batteryVoltage * batteryAmperage;
+            
+            CFRelease(props);
+        }
+        IOObjectRelease(service);
+    }
+    
+    return @{
+        @"powerSource": stateStr,
+        @"isCharging": @(isCharging),
+        @"batteryLevel": @(capacity),
+        @"batteryVoltage": @(batteryVoltage),
+        @"batteryAmperage": @(batteryAmperage),
+        @"batteryWatts": @(batteryWatts)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    if (!_probed && _smcClient.isAvailable) {
+        [self probeSensors];
+    }
+    
+    NSMutableDictionary<NSString *, NSNumber *> *readings = [NSMutableDictionary dictionary];
+    
+    NSMutableArray<NSString *> *allKeys = [NSMutableArray arrayWithArray:_discoveredPowerKeys];
+    [allKeys addObjectsFromArray:_discoveredVoltageKeys];
+    [allKeys addObjectsFromArray:_discoveredCurrentKeys];
+    
+    for (NSString *key in allKeys) {
+        NSNumber *val = [_smcClient readNumericValueForKey:key error:nil];
+        if (val) {
+            double v = [val doubleValue];
+            // Normalize mV or mA if values appear raw
+            if ([key hasPrefix:@"V"] && v > 100.0) {
+                v /= 1000.0;
+            } else if ([key hasPrefix:@"I"] && v > 500.0) {
+                v /= 1000.0;
+            }
+            readings[key] = @(v);
+        }
+    }
+    
+    NSDictionary<NSString *, id> *batteryInfo = [self sampleBatteryInfo];
+    return [MMPowerTelemetryProvider calculatePowerMetricsWithReadings:readings
+                                                           batteryInfo:batteryInfo];
+}
+
+@end

Sources/Telemetry/Storage/MMDiskIOProvider.h

@@ -0,0 +1,29 @@
+#ifndef MMDiskIOProvider_h
+#define MMDiskIOProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMDiskIOProvider
+ * Samples real-time storage disk transfer rates (read/write bytes per second)
+ * and transaction rates (read/write IOPS) across internal and external block storage devices.
+ */
+@interface MMDiskIOProvider : NSObject <MMTelemetryProvider>
+
+- (instancetype)init;
+
+/**
+ * Pure calculator method for deterministic unit testing.
+ */
++ (NSDictionary<NSString *, id> *)calculateDiskIOMetricsWithCurrentSnapshots:(NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)current
+                                                           previousSnapshots:(nullable NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)previous
+                                                                   timeDelta:(NSTimeInterval)timeDelta;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMDiskIOProvider_h */

Sources/Telemetry/Storage/MMDiskIOProvider.m

@@ -0,0 +1,170 @@
+#import "MMDiskIOProvider.h"
+#import <IOKit/IOKitLib.h>
+#import <IOKit/storage/IOBlockStorageDriver.h>
+#import <mach/mach_time.h>
+#import <os/lock.h>
+
+@interface MMDiskIOProvider () {
+    os_unfair_lock _lock;
+    NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *_previousSnapshots;
+    uint64_t _previousTimestamp;
+    mach_timebase_info_data_t _timebase;
+}
+@end
+
+@implementation MMDiskIOProvider
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        _lock = OS_UNFAIR_LOCK_INIT;
+        _previousSnapshots = nil;
+        _previousTimestamp = 0;
+        mach_timebase_info(&_timebase);
+    }
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainStorage;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.storage.io";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
++ (NSDictionary<NSString *, id> *)calculateDiskIOMetricsWithCurrentSnapshots:(NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)current
+                                                           previousSnapshots:(nullable NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)previous
+                                                                   timeDelta:(NSTimeInterval)timeDelta {
+    double totalReadBps = 0.0;
+    double totalWriteBps = 0.0;
+    double totalReadIOPS = 0.0;
+    double totalWriteIOPS = 0.0;
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *disks = [NSMutableArray arrayWithCapacity:current.count];
+    NSArray<NSString *> *sortedBsdNames = [current.allKeys sortedArrayUsingSelector:@selector(compare:)];
+    
+    for (NSString *bsdName in sortedBsdNames) {
+        NSDictionary<NSString *, NSNumber *> *curr = current[bsdName];
+        NSDictionary<NSString *, NSNumber *> *prev = previous ? previous[bsdName] : nil;
+        
+        uint64_t currReadBytes = [curr[@"readBytes"] unsignedLongLongValue];
+        uint64_t currWriteBytes = [curr[@"writeBytes"] unsignedLongLongValue];
+        uint64_t currReadOps = [curr[@"readOps"] unsignedLongLongValue];
+        uint64_t currWriteOps = [curr[@"writeOps"] unsignedLongLongValue];
+        
+        uint64_t prevReadBytes = prev ? [prev[@"readBytes"] unsignedLongLongValue] : currReadBytes;
+        uint64_t prevWriteBytes = prev ? [prev[@"writeBytes"] unsignedLongLongValue] : currWriteBytes;
+        uint64_t prevReadOps = prev ? [prev[@"readOps"] unsignedLongLongValue] : currReadOps;
+        uint64_t prevWriteOps = prev ? [prev[@"writeOps"] unsignedLongLongValue] : currWriteOps;
+        
+        double deltaReadBytes = (currReadBytes >= prevReadBytes) ? (double)(currReadBytes - prevReadBytes) : 0.0;
+        double deltaWriteBytes = (currWriteBytes >= prevWriteBytes) ? (double)(currWriteBytes - prevWriteBytes) : 0.0;
+        double deltaReadOps = (currReadOps >= prevReadOps) ? (double)(currReadOps - prevReadOps) : 0.0;
+        double deltaWriteOps = (currWriteOps >= prevWriteOps) ? (double)(currWriteOps - prevWriteOps) : 0.0;
+        
+        double readBps = (timeDelta > 0.0001) ? (deltaReadBytes / timeDelta) : 0.0;
+        double writeBps = (timeDelta > 0.0001) ? (deltaWriteBytes / timeDelta) : 0.0;
+        double readIOPS = (timeDelta > 0.0001) ? (deltaReadOps / timeDelta) : 0.0;
+        double writeIOPS = (timeDelta > 0.0001) ? (deltaWriteOps / timeDelta) : 0.0;
+        
+        totalReadBps += readBps;
+        totalWriteBps += writeBps;
+        totalReadIOPS += readIOPS;
+        totalWriteIOPS += writeIOPS;
+        
+        [disks addObject:@{
+            @"bsdName": bsdName,
+            @"readBytesPerSec": @(readBps),
+            @"writeBytesPerSec": @(writeBps),
+            @"readIOPS": @(readIOPS),
+            @"writeIOPS": @(writeIOPS),
+            @"cumulativeReadBytes": @(currReadBytes),
+            @"cumulativeWriteBytes": @(currWriteBytes),
+            @"cumulativeReadOps": @(currReadOps),
+            @"cumulativeWriteOps": @(currWriteOps)
+        }];
+    }
+    
+    return @{
+        @"disks": disks,
+        @"totalReadBytesPerSec": @(totalReadBps),
+        @"totalWriteBytesPerSec": @(totalWriteBps),
+        @"totalReadIOPS": @(totalReadIOPS),
+        @"totalWriteIOPS": @(totalWriteIOPS),
+        @"timeDelta": @(timeDelta)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    uint64_t now = mach_absolute_time();
+    
+    NSMutableDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *currentSnapshots = [NSMutableDictionary dictionary];
+    
+    CFMutableDictionaryRef matching = IOServiceMatching(kIOBlockStorageDriverClass);
+    io_iterator_t iterator = IO_OBJECT_NULL;
+    if (IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iterator) == KERN_SUCCESS && iterator != IO_OBJECT_NULL) {
+        io_registry_entry_t entry;
+        while ((entry = IOIteratorNext(iterator)) != IO_OBJECT_NULL) {
+            NSString *bsdName = nil;
+            io_iterator_t childIterator;
+            if (IORegistryEntryGetChildIterator(entry, kIOServicePlane, &childIterator) == KERN_SUCCESS) {
+                io_registry_entry_t child;
+                while ((child = IOIteratorNext(childIterator)) != IO_OBJECT_NULL) {
+                    CFTypeRef nameRef = IORegistryEntryCreateCFProperty(child, CFSTR("BSD Name"), kCFAllocatorDefault, 0);
+                    if (nameRef) {
+                        bsdName = CFBridgingRelease(nameRef);
+                        IOObjectRelease(child);
+                        break;
+                    }
+                    IOObjectRelease(child);
+                }
+                IOObjectRelease(childIterator);
+            }
+            
+            if (bsdName) {
+                CFTypeRef statsRef = IORegistryEntryCreateCFProperty(entry, CFSTR("Statistics"), kCFAllocatorDefault, 0);
+                if (statsRef) {
+                    NSDictionary *stats = CFBridgingRelease(statsRef);
+                    NSNumber *readBytes = stats[@"Bytes (Read)"] ?: @0;
+                    NSNumber *writeBytes = stats[@"Bytes (Write)"] ?: @0;
+                    NSNumber *readOps = stats[@"Operations (Read)"] ?: @0;
+                    NSNumber *writeOps = stats[@"Operations (Write)"] ?: @0;
+                    
+                    currentSnapshots[bsdName] = @{
+                        @"readBytes": readBytes,
+                        @"writeBytes": writeBytes,
+                        @"readOps": readOps,
+                        @"writeOps": writeOps
+                    };
+                }
+            }
+            IOObjectRelease(entry);
+        }
+        IOObjectRelease(iterator);
+    }
+    
+    os_unfair_lock_lock(&_lock);
+    NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *prev = _previousSnapshots;
+    uint64_t prevTime = _previousTimestamp;
+    
+    _previousSnapshots = currentSnapshots;
+    _previousTimestamp = now;
+    os_unfair_lock_unlock(&_lock);
+    
+    NSTimeInterval timeDelta = 1.0;
+    if (prevTime > 0) {
+        uint64_t elapsed = now - prevTime;
+        timeDelta = (double)elapsed * _timebase.numer / _timebase.denom / 1e9;
+    }
+    
+    return [MMDiskIOProvider calculateDiskIOMetricsWithCurrentSnapshots:currentSnapshots
+                                                      previousSnapshots:prev
+                                                              timeDelta:timeDelta];
+}
+
+@end

Sources/Telemetry/System/MMLoadAverageProvider.h

@@ -0,0 +1,33 @@
+#ifndef MMLoadAverageProvider_h
+#define MMLoadAverageProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMLoadAverageProvider
+ * Samples 1m, 5m, and 15m system load averages, Mach concurrency factors,
+ * and system-wide task and thread counts.
+ */
+@interface MMLoadAverageProvider : NSObject <MMTelemetryProvider>
+
+- (instancetype)init;
+
+/**
+ * Pure calculator method for deterministic unit testing.
+ */
++ (NSDictionary<NSString *, id> *)calculateLoadMetricsWithLoad1:(double)load1
+                                                          load5:(double)load5
+                                                         load15:(double)load15
+                                                      taskCount:(int)taskCount
+                                                    threadCount:(int)threadCount
+                                                       cpuCount:(int)cpuCount
+                                                     machFactor:(double)machFactor;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMLoadAverageProvider_h */

Sources/Telemetry/System/MMLoadAverageProvider.m

@@ -0,0 +1,92 @@
+#import "MMLoadAverageProvider.h"
+#import <mach/mach.h>
+#import <mach/processor_info.h>
+#import <sys/sysctl.h>
+#import <stdlib.h>
+
+@implementation MMLoadAverageProvider
+
+- (instancetype)init {
+    self = [super init];
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainSystem;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.system.load";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
++ (NSDictionary<NSString *, id> *)calculateLoadMetricsWithLoad1:(double)load1
+                                                          load5:(double)load5
+                                                         load15:(double)load15
+                                                      taskCount:(int)taskCount
+                                                    threadCount:(int)threadCount
+                                                       cpuCount:(int)cpuCount
+                                                     machFactor:(double)machFactor {
+    int safeCpus = cpuCount > 0 ? cpuCount : 1;
+    double norm1 = load1 / (double)safeCpus;
+    double norm5 = load5 / (double)safeCpus;
+    double norm15 = load15 / (double)safeCpus;
+    
+    return @{
+        @"load1m": @(load1),
+        @"load5m": @(load5),
+        @"load15m": @(load15),
+        @"normalizedLoad1m": @(norm1),
+        @"normalizedLoad5m": @(norm5),
+        @"normalizedLoad15m": @(norm15),
+        @"taskCount": @(taskCount),
+        @"threadCount": @(threadCount),
+        @"logicalCpuCount": @(safeCpus),
+        @"machFactor": @(machFactor),
+        @"isOverloaded": @(norm1 > 1.0)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    // 1. Get BSD load averages
+    double load[3] = {0.0, 0.0, 0.0};
+    int ret = getloadavg(load, 3);
+    if (ret <= 0) {
+        load[0] = 0.0;
+        load[1] = 0.0;
+        load[2] = 0.0;
+    }
+    
+    // 2. Query Mach processor set for task & thread counts and mach factor
+    mach_port_t host = mach_host_self();
+    processor_set_name_port_t pset = MACH_PORT_NULL;
+    processor_set_load_info_data_t loadInfo = {0};
+    mach_msg_type_number_t count = PROCESSOR_SET_LOAD_INFO_COUNT;
+    
+    kern_return_t kr = processor_set_default(host, &pset);
+    if (kr == KERN_SUCCESS && MACH_PORT_VALID(pset)) {
+        kr = processor_set_statistics(pset, PROCESSOR_SET_LOAD_INFO, (processor_set_info_t)&loadInfo, &count);
+        mach_port_deallocate(mach_task_self(), pset);
+    }
+    
+    double machFactor = (double)loadInfo.mach_factor / (double)LOAD_SCALE;
+    
+    // 3. Query logical CPU core count
+    int cpuCount = 1;
+    size_t size = sizeof(cpuCount);
+    sysctlbyname("hw.logicalcpu", &cpuCount, &size, NULL, 0);
+    if (cpuCount <= 0) cpuCount = 1;
+    
+    return [MMLoadAverageProvider calculateLoadMetricsWithLoad1:load[0]
+                                                          load5:load[1]
+                                                         load15:load[2]
+                                                      taskCount:loadInfo.task_count
+                                                    threadCount:loadInfo.thread_count
+                                                       cpuCount:cpuCount
+                                                     machFactor:machFactor];
+}
+
+@end

Sources/UI/ContentView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 
 public struct ContentView: View {
     @State private var store = SystemTelemetryStore.shared
+    @State private var selectedTab: String = "Dashboard"
     
     public init() {}
     
@@ -11,59 +12,111 @@ public struct ContentView: View {
         } detail: {
             detailContent
         }
-        .frame(minWidth: 800, minHeight: 520)
+        .frame(minWidth: 900, minHeight: 650)
         .onAppear {
             store.start()
         }
     }
     
+    // MARK: - Sidebar
     private var sidebarContent: some View {
-        List {
+        List(selection: $selectedTab) {
-            Section("System Status") {
+            Section("Overview") {
                 Label("Dashboard", systemImage: "gauge.with.needle")
-                Label("Architecture", systemImage: "cpu")
+                    .tag("Dashboard")
+                Label("Hardware Architecture", systemImage: "cpu")
+                    .tag("Architecture")
             }
             
-            Section("Telemetry Domains") {
+            Section("Primary Telemetry") {
-                Label("CPU & Thermals", systemImage: "flame")
+                Label("CPU Load & Cores", systemImage: "chart.bar.xaxis")
+                    .tag("CPU")
+                Label("Thermal Matrix", systemImage: "flame")
+                    .tag("Thermals")
                 Label("Fans & Cooling", systemImage: "fanblades")
+                    .tag("Fans")
                 Label("Memory & Swap", systemImage: "memorychip")
-                Label("Disks & Volumes", systemImage: "internaldrive")
+                    .tag("Memory")
-                Label("Processes", systemImage: "list.bullet.rectangle")
+                Label("Storage Volumes", systemImage: "internaldrive")
-                Label("Network", systemImage: "network")
+                    .tag("Storage")
-                Label("Graphics (GPU)", systemImage: "display")
+                Label("Power & Voltage", systemImage: "bolt.fill")
+                    .tag("Power")
             }
         }
         .listStyle(.sidebar)
-        .navigationSplitViewColumnWidth(min: 200, ideal: 220, max: 280)
+        .navigationSplitViewColumnWidth(min: 200, ideal: 230, max: 280)
     }
     
+    // MARK: - Detail Content Router
+    @ViewBuilder
     private var detailContent: some View {
         ScrollView {
             VStack(alignment: .leading, spacing: 20) {
-                // Header Banner
                 headerCard
-                
-                // Telemetry Engine Control
                 engineControlCard
                 
-                // System Specifications
+                switch selectedTab {
-                specsCard
+                case "Dashboard":
-                
+                    dashboardView
-                // Providers Status
+                case "Architecture":
-                providersCard
+                    specsCard
+                    providersCard
+                case "CPU":
+                    cpuLoadCard
+                    specsCard
+                case "Thermals":
+                    cpuThermalCard
+                    componentThermalCard
+                case "Fans":
+                    fansCard
+                case "Memory":
+                    memoryCard
+                case "Storage":
+                    storageCard
+                case "Power":
+                    powerCard
+                default:
+                    dashboardView
+                }
             }
             .padding(24)
         }
-        .navigationTitle("MacMonitor Dashboard")
+        .navigationTitle("MacMonitor — \(selectedTab)")
     }
     
+    // MARK: - Dashboard Composite View
+    private var dashboardView: some View {
+        VStack(alignment: .leading, spacing: 20) {
+            // Top Row: CPU & Memory Summary Cards
+            HStack(alignment: .top, spacing: 16) {
+                cpuLoadCard
+                memoryCard
+            }
+            
+            // Middle Row: Thermals & Fans Summary Cards
+            HStack(alignment: .top, spacing: 16) {
+                cpuThermalCard
+                fansCard
+            }
+            
+            // Power & Storage Summary
+            HStack(alignment: .top, spacing: 16) {
+                powerCard
+                storageCard
+            }
+            
+            // Detailed Component Thermals Matrix
+            componentThermalCard
+        }
+    }
+    
+    // MARK: - Header Banner
     private var headerCard: some View {
         HStack(alignment: .center, spacing: 16) {
             Image(systemName: "macpro.gen3.fill")
                 .resizable()
                 .scaledToFit()
-                .frame(width: 48, height: 48)
+                .frame(width: 44, height: 44)
                 .foregroundStyle(.blue)
             
             VStack(alignment: .leading, spacing: 4) {
@@ -80,7 +133,7 @@ public struct ContentView: View {
                 Circle()
                     .fill(store.isRunning ? Color.green : Color.red)
                     .frame(width: 10, height: 10)
-                Text(store.isRunning ? "ENGINE ACTIVE" : "ENGINE PAUSED")
+                Text(store.isRunning ? "ACTIVE" : "PAUSED")
                     .font(.caption.bold())
                     .foregroundStyle(store.isRunning ? .green : .secondary)
             }
@@ -93,55 +146,307 @@ public struct ContentView: View {
         .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
     }
     
+    // MARK: - Telemetry Coordinator Controls
     private var engineControlCard: some View {
-        VStack(alignment: .leading, spacing: 12) {
+        HStack(spacing: 16) {
-            Text("Telemetry Coordinator Engine")
+            Button(action: {
-                .font(.headline)
+                if store.isRunning { store.stop() } else { store.start() }
+            }) {
+                Label(store.isRunning ? "Pause Engine" : "Start Engine",
+                      systemImage: store.isRunning ? "pause.fill" : "play.fill")
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(store.isRunning ? .orange : .green)
             
-            HStack(spacing: 16) {
+            Button(action: { store.triggerManualSample() }) {
-                Button(action: {
+                Label("Sample Now", systemImage: "arrow.clockwise")
-                    if store.isRunning {
+            }
-                        store.stop()
+            .buttonStyle(.bordered)
-                    } else {
+            
-                        store.start()
+            Spacer()
-                    }
+            
-                }) {
+            Picker("Interval:", selection: Binding(
-                    Label(store.isRunning ? "Pause Engine" : "Start Engine",
+                get: { store.sampleInterval },
-                          systemImage: store.isRunning ? "pause.fill" : "play.fill")
+                set: { store.setSampleInterval($0) }
-                }
+            )) {
-                .buttonStyle(.borderedProminent)
+                Text("0.5s").tag(0.5)
-                .tint(store.isRunning ? .orange : .green)
+                Text("1.0s").tag(1.0)
-                
+                Text("2.0s").tag(2.0)
-                Button(action: {
+                Text("5.0s").tag(5.0)
-                    store.triggerManualSample()
+            }
-                }) {
+            .pickerStyle(.segmented)
-                    Label("Sample Now", systemImage: "arrow.clockwise")
+            .frame(width: 220)
-                }
+            
-                .buttonStyle(.bordered)
+            Text("Updated: \(store.lastUpdateTimestamp.formatted(date: .omitted, time: .standard))")
-                
+                .font(.caption)
+                .foregroundStyle(.secondary)
+        }
+        .padding(14)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - CPU Load Card
+    private var cpuLoadCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("CPU Activity", systemImage: "cpu")
+                    .font(.headline)
                 Spacer()
-                
+                if store.cpuLoad.isThrottled {
-                Picker("Polling Interval:", selection: Binding(
+                    Text("THROTTLED")
-                    get: { store.sampleInterval },
+                        .font(.caption.bold())
-                    set: { store.setSampleInterval($0) }
+                        .foregroundStyle(.red)
-                )) {
+                        .padding(.horizontal, 6)
-                    Text("0.5s").tag(0.5)
+                        .padding(.vertical, 2)
-                    Text("1.0s").tag(1.0)
+                        .background(Color.red.opacity(0.15), in: Capsule())
-                    Text("2.0s").tag(2.0)
-                    Text("5.0s").tag(5.0)
                 }
-                .pickerStyle(.segmented)
+                Text(String(format: "%.1f%%", store.cpuLoad.totalLoad))
-                .frame(width: 220)
+                    .font(.title3.bold().monospacedDigit())
             }
             
+            ProgressView(value: min(store.cpuLoad.totalLoad / 100.0, 1.0))
+                .tint(store.cpuLoad.totalLoad > 85 ? .red : (store.cpuLoad.totalLoad > 60 ? .orange : .blue))
+            
             HStack {
-                Text("Last Sample Cycle: \(store.lastUpdateTimestamp.formatted(date: .omitted, time: .standard))")
+                Text("User: \(String(format: "%.1f%%", store.cpuLoad.userLoad))")
-                    .font(.caption)
-                    .foregroundStyle(.secondary)
                 Spacer()
-                Text("Queue: com.i3omb.macmonitor.telemetry (QOS_UTILITY)")
+                Text("System: \(String(format: "%.1f%%", store.cpuLoad.systemLoad))")
+                Spacer()
+                Text("Idle: \(String(format: "%.1f%%", store.cpuLoad.idleLoad))")
+            }
+            .font(.caption)
+            .foregroundStyle(.secondary)
+            
+            if !store.cpuLoad.perCoreLoad.isEmpty {
+                Divider()
+                Text("Per-Core Utilization (\(store.cpuLoad.perCoreLoad.count) Cores)")
+                    .font(.caption.bold())
+                    .foregroundStyle(.secondary)
+                
+                LazyVGrid(columns: [GridItem(.adaptive(minimum: 70))], spacing: 8) {
+                    ForEach(Array(store.cpuLoad.perCoreLoad.enumerated()), id: \.offset) { idx, load in
+                        VStack(spacing: 4) {
+                            Text("Core \(idx)")
+                                .font(.system(size: 10))
+                                .foregroundStyle(.secondary)
+                            ProgressView(value: min(load / 100.0, 1.0))
+                                .tint(load > 85 ? .red : .blue)
+                            Text(String(format: "%.0f%%", load))
+                                .font(.system(size: 10, weight: .bold, design: .monospaced))
+                        }
+                    }
+                }
+            }
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity, alignment: .topLeading)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - Memory & Swap Card
+    private var memoryCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("Memory & Swap", systemImage: "memorychip")
+                    .font(.headline)
+                Spacer()
+                Text(store.memory.pressureLevel)
+                    .font(.caption.bold())
+                    .foregroundStyle(pressureColor(store.memory.pressureLevel))
+                    .padding(.horizontal, 6)
+                    .padding(.vertical, 2)
+                    .background(pressureColor(store.memory.pressureLevel).opacity(0.15), in: Capsule())
+                Text(String(format: "%.1f%%", store.memory.utilizationPercentage))
+                    .font(.title3.bold().monospacedDigit())
+            }
+            
+            ProgressView(value: min(store.memory.utilizationPercentage / 100.0, 1.0))
+                .tint(pressureColor(store.memory.pressureLevel))
+            
+            Grid(alignment: .leading, horizontalSpacing: 16, verticalSpacing: 6) {
+                GridRow {
+                    Text("Physical RAM:").foregroundStyle(.secondary)
+                    Text(formatBytes(store.memory.totalBytes)).bold()
+                    Text("Used:").foregroundStyle(.secondary)
+                    Text(formatBytes(store.memory.usedBytes)).bold()
+                }
+                GridRow {
+                    Text("Wired:").foregroundStyle(.secondary)
+                    Text(formatBytes(store.memory.wiredBytes))
+                    Text("Compressed:").foregroundStyle(.secondary)
+                    Text(formatBytes(store.memory.compressedBytes))
+                }
+                GridRow {
+                    Text("Active:").foregroundStyle(.secondary)
+                    Text(formatBytes(store.memory.activeBytes))
+                    Text("Free / Inactive:").foregroundStyle(.secondary)
+                    Text(formatBytes(store.memory.freeBytes + store.memory.inactiveBytes))
+                }
+                if store.memory.swapTotalBytes > 0 {
+                    GridRow {
+                        Text("Swap Total:").foregroundStyle(.secondary)
+                        Text(formatBytes(store.memory.swapTotalBytes))
+                        Text("Swap Used:").foregroundStyle(.secondary)
+                        Text(formatBytes(store.memory.swapUsedBytes))
+                    }
+                }
+            }
+            .font(.caption)
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity, alignment: .topLeading)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - CPU Thermal Card
+    private var cpuThermalCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("CPU Thermals", systemImage: "flame.fill")
+                    .font(.headline)
+                Spacer()
+                Text(store.cpuThermal.thermalPressureState)
+                    .font(.caption.bold())
+                    .foregroundStyle(store.cpuThermal.isThrottling ? .red : .green)
+                    .padding(.horizontal, 6)
+                    .padding(.vertical, 2)
+                    .background((store.cpuThermal.isThrottling ? Color.red : Color.green).opacity(0.15), in: Capsule())
+                Text(String(format: "%.1f°C", store.cpuThermal.packageTemperature))
+                    .font(.title3.bold().monospacedDigit())
+            }
+            
+            HStack(spacing: 24) {
+                VStack(alignment: .leading, spacing: 2) {
+                    Text("Package Temp").font(.caption).foregroundStyle(.secondary)
+                    Text(String(format: "%.1f°C", store.cpuThermal.packageTemperature)).bold()
+                }
+                VStack(alignment: .leading, spacing: 2) {
+                    Text("Peak Core").font(.caption).foregroundStyle(.secondary)
+                    Text(String(format: "%.1f°C", store.cpuThermal.peakCoreTemperature)).bold()
+                }
+                VStack(alignment: .leading, spacing: 2) {
+                    Text("Average Core").font(.caption).foregroundStyle(.secondary)
+                    Text(String(format: "%.1f°C", store.cpuThermal.averageCoreTemperature)).bold()
+                }
+            }
+            
+            if !store.cpuThermal.coreTemperatures.isEmpty {
+                Divider()
+                Text("Core Temperature Breakdown")
+                    .font(.caption.bold())
+                    .foregroundStyle(.secondary)
+                
+                LazyVGrid(columns: [GridItem(.adaptive(minimum: 80))], spacing: 8) {
+                    ForEach(store.cpuThermal.coreTemperatures, id: \.key) { core in
+                        VStack(spacing: 2) {
+                            Text("Core \(core.index)")
+                                .font(.system(size: 10))
+                                .foregroundStyle(.secondary)
+                            Text(String(format: "%.1f°C", core.temperature))
+                                .font(.system(size: 11, weight: .bold, design: .monospaced))
+                                .foregroundStyle(core.temperature > 85 ? .red : (core.temperature > 70 ? .orange : .primary))
+                        }
+                        .padding(6)
+                        .background(.quaternary, in: RoundedRectangle(cornerRadius: 6))
+                    }
+                }
+            }
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity, alignment: .topLeading)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - Fans & Tachometers Card
+    private var fansCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("Cooling Fans", systemImage: "fanblades.fill")
+                    .font(.headline)
+                Spacer()
+                Text("\(store.fans.count) Detected")
+                    .font(.caption.bold())
+                    .foregroundStyle(.secondary)
+            }
+            
+            if store.fans.isEmpty {
+                Text("No active AppleSMC fans detected or passive cooling chassis.")
                     .font(.caption)
                     .foregroundStyle(.secondary)
+                    .padding(.vertical, 8)
+            } else {
+                ForEach(store.fans) { fan in
+                    VStack(alignment: .leading, spacing: 6) {
+                        HStack {
+                            Text(fan.name).bold()
+                            Spacer()
+                            Text(String(format: "%.0f RPM (%.0f%%)", fan.currentRPM, fan.utilization))
+                                .font(.subheadline.bold().monospacedDigit())
+                        }
+                        ProgressView(value: min(fan.utilization / 100.0, 1.0))
+                            .tint(fan.utilization > 80 ? .red : .blue)
+                        HStack {
+                            Text("Min: \(Int(fan.minRPM)) RPM")
+                            Spacer()
+                            Text("Target: \(Int(fan.targetRPM)) RPM")
+                            Spacer()
+                            Text("Max: \(Int(fan.maxRPM)) RPM")
+                        }
+                        .font(.system(size: 10))
+                        .foregroundStyle(.secondary)
+                    }
+                    .padding(8)
+                    .background(.quaternary, in: RoundedRectangle(cornerRadius: 8))
+                }
+            }
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity, alignment: .topLeading)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - Component Thermals Matrix Card
+    private var componentThermalCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("Chassis & Component Thermals", systemImage: "thermometer.medium")
+                    .font(.headline)
+                Spacer()
+                Text("\(store.componentTemps.count) Sensors")
+                    .font(.caption.bold())
+                    .foregroundStyle(.secondary)
+            }
+            
+            if store.componentTemps.isEmpty {
+                Text("Awaiting component thermal probe...")
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+            } else {
+                LazyVGrid(columns: [GridItem(.adaptive(minimum: 160))], spacing: 10) {
+                    ForEach(store.componentTemps) { item in
+                        VStack(alignment: .leading, spacing: 4) {
+                            Text(item.name)
+                                .font(.system(size: 11, weight: .semibold))
+                                .lineLimit(1)
+                            HStack {
+                                Text(item.category)
+                                    .font(.system(size: 9))
+                                    .foregroundStyle(.secondary)
+                                Spacer()
+                                Text(String(format: "%.1f°C", item.temperature))
+                                    .font(.system(size: 11, weight: .bold, design: .monospaced))
+                                    .foregroundStyle(item.temperature > 75 ? .red : .primary)
+                            }
+                        }
+                        .padding(8)
+                        .background(.quaternary, in: RoundedRectangle(cornerRadius: 8))
+                    }
+                }
             }
         }
         .padding(16)
@@ -149,6 +454,108 @@ public struct ContentView: View {
         .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
     }
     
+    // MARK: - Storage Volumes Card
+    private var storageCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("Storage Volumes", systemImage: "internaldrive")
+                    .font(.headline)
+                Spacer()
+                Text("\(store.storageVolumes.count) Mounted")
+                    .font(.caption.bold())
+                    .foregroundStyle(.secondary)
+            }
+            
+            if store.storageVolumes.isEmpty {
+                Text("No mounted APFS/HFS volumes discovered.")
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+            } else {
+                ForEach(store.storageVolumes) { vol in
+                    VStack(alignment: .leading, spacing: 4) {
+                        HStack {
+                            Text(vol.volumeName).bold()
+                            Text("(\(vol.fileSystem))").font(.caption).foregroundStyle(.secondary)
+                            Spacer()
+                            Text("\(formatBytes(vol.usedBytes)) / \(formatBytes(vol.totalBytes))")
+                                .font(.caption.monospacedDigit())
+                        }
+                        ProgressView(value: min(vol.usedPercentage / 100.0, 1.0))
+                            .tint(vol.usedPercentage > 90 ? .red : .blue)
+                        HStack {
+                            Text("Mount: \(vol.mountPoint)").font(.system(size: 10)).foregroundStyle(.secondary)
+                            Spacer()
+                            Text(String(format: "%.1f%% Used", vol.usedPercentage)).font(.system(size: 10, weight: .bold))
+                        }
+                    }
+                    .padding(8)
+                    .background(.quaternary, in: RoundedRectangle(cornerRadius: 8))
+                }
+            }
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity, alignment: .topLeading)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - Power & Voltage Card
+    private var powerCard: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Label("Power & Voltage", systemImage: "bolt.fill")
+                    .font(.headline)
+                Spacer()
+                HStack(spacing: 4) {
+                    Image(systemName: store.power.powerSource.contains("Battery") ? "battery.75" : "powerplug.fill")
+                    Text(store.power.powerSource)
+                }
+                .font(.caption.bold())
+                .foregroundStyle(.secondary)
+                
+                Text(String(format: "%.1f W", store.power.systemTotalWatts))
+                    .font(.title3.bold().monospacedDigit())
+            }
+            
+            Grid(alignment: .leading, horizontalSpacing: 16, verticalSpacing: 6) {
+                GridRow {
+                    Text("Total Draw:").foregroundStyle(.secondary)
+                    Text(String(format: "%.1f W", store.power.systemTotalWatts)).bold()
+                    Text("CPU Package:").foregroundStyle(.secondary)
+                    Text(String(format: "%.1f W", store.power.cpuWatts)).bold()
+                }
+                GridRow {
+                    Text("CPU Core Voltage:").foregroundStyle(.secondary)
+                    Text(store.power.cpuVoltage > 0 ? String(format: "%.3f V", store.power.cpuVoltage) : "N/A")
+                    Text("CPU Current:").foregroundStyle(.secondary)
+                    Text(store.power.cpuCurrent > 0 ? String(format: "%.2f A", store.power.cpuCurrent) : "N/A")
+                }
+                if store.power.gpuWatts > 0 || store.power.memoryWatts > 0 {
+                    GridRow {
+                        Text("GPU Draw:").foregroundStyle(.secondary)
+                        Text(String(format: "%.1f W", store.power.gpuWatts))
+                        Text("Memory Subsystem:").foregroundStyle(.secondary)
+                        Text(String(format: "%.1f W", store.power.memoryWatts))
+                    }
+                }
+                if store.power.powerSource.contains("Battery") {
+                    GridRow {
+                        Text("Battery Level:").foregroundStyle(.secondary)
+                        Text(String(format: "%.0f%% %@", store.power.batteryLevel, store.power.isCharging ? "(Charging)" : ""))
+                        Text("Status:").foregroundStyle(.secondary)
+                        Text(store.power.isCharging ? "Charging" : "Discharging")
+                    }
+                }
+            }
+            .font(.caption)
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity, alignment: .topLeading)
+        .background(.background, in: RoundedRectangle(cornerRadius: 12))
+        .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
+    }
+    
+    // MARK: - Hardware Specs Card
     private var specsCard: some View {
         VStack(alignment: .leading, spacing: 12) {
             Text("Host Architecture & Kernel")
@@ -180,6 +587,7 @@ public struct ContentView: View {
         .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
     }
     
+    // MARK: - Providers Card
     private var providersCard: some View {
         VStack(alignment: .leading, spacing: 12) {
             HStack {
@@ -195,33 +603,38 @@ public struct ContentView: View {
                     .clipShape(Capsule())
             }
             
-            if store.latestSnapshot.isEmpty {
+            ForEach(Array(store.latestSnapshot.keys.sorted()), id: \.self) { key in
-                HStack(spacing: 12) {
+                HStack {
-                    Image(systemName: "info.circle")
+                    Image(systemName: "checkmark.circle.fill")
-                        .foregroundStyle(.secondary)
+                        .foregroundStyle(.green)
-                    Text("Telemetry coordinator initialized. Awaiting provider metrics.")
+                    Text(key)
-                        .font(.subheadline)
+                        .font(.system(.body, design: .monospaced))
+                    Spacer()
+                    Text("\(store.latestSnapshot[key]?.count ?? 0) metrics")
+                        .font(.caption)
                         .foregroundStyle(.secondary)
                 }
-                .padding(.vertical, 8)
+                .padding(.vertical, 4)
-            } else {
-                ForEach(Array(store.latestSnapshot.keys.sorted()), id: \.self) { key in
-                    HStack {
-                        Image(systemName: "checkmark.circle.fill")
-                            .foregroundStyle(.green)
-                        Text(key)
-                            .font(.system(.body, design: .monospaced))
-                        Spacer()
-                        Text("\(store.latestSnapshot[key]?.count ?? 0) metrics")
-                            .font(.caption)
-                            .foregroundStyle(.secondary)
-                    }
-                    .padding(.vertical, 4)
-                }
             }
         }
         .padding(16)
         .background(.background, in: RoundedRectangle(cornerRadius: 12))
         .overlay(RoundedRectangle(cornerRadius: 12).stroke(.separator, lineWidth: 1))
     }
+    
+    // MARK: - Formatting Helpers
+    private func formatBytes(_ bytes: UInt64) -> String {
+        let formatter = ByteCountFormatter()
+        formatter.allowedUnits = [.useGB, .useMB]
+        formatter.countStyle = .memory
+        return formatter.string(fromByteCount: Int64(bytes))
+    }
+    
+    private func pressureColor(_ level: String) -> Color {
+        switch level {
+        case "Critical": return .red
+        case "Warning": return .orange
+        default: return .green
+        }
+    }
 }

Tests/MMDiskIOTests.swift

@@ -0,0 +1,73 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMDiskIOTests: XCTestCase {
+    
+    func testDiskIOMetricsCalculation() {
+        let prev: [String: [String: NSNumber]] = [
+            "disk0": [
+                "readBytes": NSNumber(value: 10_000_000),
+                "writeBytes": NSNumber(value: 5_000_000),
+                "readOps": NSNumber(value: 1_000),
+                "writeOps": NSNumber(value: 500)
+            ],
+            "disk1": [
+                "readBytes": NSNumber(value: 2_000_000),
+                "writeBytes": NSNumber(value: 1_000_000),
+                "readOps": NSNumber(value: 200),
+                "writeOps": NSNumber(value: 100)
+            ]
+        ]
+        
+        let curr: [String: [String: NSNumber]] = [
+            "disk0": [
+                "readBytes": NSNumber(value: 20_000_000), // delta = 10,000,000 bytes
+                "writeBytes": NSNumber(value: 7_000_000),  // delta = 2,000,000 bytes
+                "readOps": NSNumber(value: 1_200),         // delta = 200 ops
+                "writeOps": NSNumber(value: 600)           // delta = 100 ops
+            ],
+            "disk1": [
+                "readBytes": NSNumber(value: 4_000_000),  // delta = 2,000,000 bytes
+                "writeBytes": NSNumber(value: 1_000_000),  // delta = 0
+                "readOps": NSNumber(value: 250),           // delta = 50 ops
+                "writeOps": NSNumber(value: 100)           // delta = 0 ops
+            ]
+        ]
+        
+        let timeDelta: TimeInterval = 2.0 // 2 seconds
+        
+        let metrics = MMDiskIOProvider.calculateDiskIOMetrics(
+            withCurrentSnapshots: curr,
+            previousSnapshots: prev,
+            timeDelta: timeDelta
+        )
+        
+        let totalReadBps = metrics["totalReadBytesPerSec"] as? Double ?? 0
+        let totalWriteBps = metrics["totalWriteBytesPerSec"] as? Double ?? 0
+        let totalReadIOPS = metrics["totalReadIOPS"] as? Double ?? 0
+        let totalWriteIOPS = metrics["totalWriteIOPS"] as? Double ?? 0
+        let disks = metrics["disks"] as? [[String: Any]] ?? []
+        
+        // (10MB + 2MB) / 2s = 6,000,000 B/s
+        XCTAssertEqual(totalReadBps, 6_000_000.0, accuracy: 1.0)
+        // (2MB + 0) / 2s = 1,000,000 B/s
+        XCTAssertEqual(totalWriteBps, 1_000_000.0, accuracy: 1.0)
+        // (200 + 50) / 2s = 125 IOPS
+        XCTAssertEqual(totalReadIOPS, 125.0, accuracy: 0.1)
+        // (100 + 0) / 2s = 50 IOPS
+        XCTAssertEqual(totalWriteIOPS, 50.0, accuracy: 0.1)
+        XCTAssertEqual(disks.count, 2)
+    }
+    
+    func testLiveDiskIOProvider() throws {
+        let provider = MMDiskIOProvider()
+        XCTAssertEqual(provider.domain, .storage)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.storage.io")
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["totalReadBytesPerSec"])
+        XCTAssertNotNil(sample["totalWriteBytesPerSec"])
+        XCTAssertNotNil(sample["disks"])
+    }
+}

Tests/MMKernelTelemetryTests.swift

@@ -0,0 +1,70 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMKernelTelemetryTests: XCTestCase {
+    
+    func testKernelRatesCalculation() {
+        let prev: [String: NSNumber] = [
+            "contextSwitches": NSNumber(value: 100_000),
+            "syscalls": NSNumber(value: 200_000),
+            "pageFaults": NSNumber(value: 50_000),
+            "cowFaults": NSNumber(value: 1_000),
+            "zeroFills": NSNumber(value: 10_000),
+            "pageins": NSNumber(value: 500),
+            "pageouts": NSNumber(value: 100),
+            "decompressions": NSNumber(value: 200),
+            "compressions": NSNumber(value: 300)
+        ]
+        
+        let curr: [String: NSNumber] = [
+            "contextSwitches": NSNumber(value: 102_500), // delta = 2,500
+            "syscalls": NSNumber(value: 210_000),        // delta = 10,000
+            "pageFaults": NSNumber(value: 51_000),       // delta = 1,000
+            "cowFaults": NSNumber(value: 1_050),         // delta = 50
+            "zeroFills": NSNumber(value: 10_200),        // delta = 200
+            "pageins": NSNumber(value: 520),             // delta = 20
+            "pageouts": NSNumber(value: 105),            // delta = 5
+            "decompressions": NSNumber(value: 210),      // delta = 10
+            "compressions": NSNumber(value: 315)         // delta = 15
+        ]
+        
+        let timeDelta: TimeInterval = 2.0 // 2 seconds
+        
+        let rates = MMKernelTelemetryProvider.calculateRates(
+            withCurrentCounters: curr,
+            previousCounters: prev,
+            timeDelta: timeDelta
+        )
+        
+        let cswRate = rates["contextSwitchesRate"] as? Double ?? 0
+        let syscallRate = rates["syscallsRate"] as? Double ?? 0
+        let faultRate = rates["pageFaultsRate"] as? Double ?? 0
+        let cowRate = rates["cowFaultsRate"] as? Double ?? 0
+        let zeroFillRate = rates["zeroFillsRate"] as? Double ?? 0
+        let pageinsRate = rates["pageinsRate"] as? Double ?? 0
+        
+        XCTAssertEqual(cswRate, 1250.0, accuracy: 0.1)
+        XCTAssertEqual(syscallRate, 5000.0, accuracy: 0.1)
+        XCTAssertEqual(faultRate, 500.0, accuracy: 0.1)
+        XCTAssertEqual(cowRate, 25.0, accuracy: 0.1)
+        XCTAssertEqual(zeroFillRate, 100.0, accuracy: 0.1)
+        XCTAssertEqual(pageinsRate, 10.0, accuracy: 0.1)
+        
+        let cumCSW = rates["cumulative_contextSwitches"] as? UInt64 ?? 0
+        XCTAssertEqual(cumCSW, 102_500)
+    }
+    
+    func testLiveKernelProvider() throws {
+        let provider = MMKernelTelemetryProvider()
+        XCTAssertEqual(provider.domain, .system)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.kernel.counters")
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["cumulative_contextSwitches"])
+        XCTAssertNotNil(sample["cumulative_syscalls"])
+        XCTAssertNotNil(sample["cumulative_pageFaults"])
+        XCTAssertNotNil(sample["contextSwitchesRate"])
+        XCTAssertNotNil(sample["syscallsRate"])
+    }
+}

Tests/MMLoadAverageTests.swift

@@ -0,0 +1,62 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMLoadAverageTests: XCTestCase {
+    
+    func testLoadMetricsCalculation() {
+        let metrics = MMLoadAverageProvider.calculateLoadMetrics(
+            withLoad1: 4.0,
+            load5: 3.5,
+            load15: 2.5,
+            taskCount: 500,
+            threadCount: 2200,
+            cpuCount: 8,
+            machFactor: 1.25
+        )
+        
+        let load1 = metrics["load1m"] as? Double ?? 0
+        let norm1 = metrics["normalizedLoad1m"] as? Double ?? 0
+        let norm5 = metrics["normalizedLoad5m"] as? Double ?? 0
+        let taskCount = metrics["taskCount"] as? Int ?? 0
+        let threadCount = metrics["threadCount"] as? Int ?? 0
+        let isOverloaded = metrics["isOverloaded"] as? Bool ?? true
+        
+        XCTAssertEqual(load1, 4.0, accuracy: 0.01)
+        XCTAssertEqual(norm1, 4.0 / 8.0, accuracy: 0.01)
+        XCTAssertEqual(norm5, 3.5 / 8.0, accuracy: 0.01)
+        XCTAssertEqual(taskCount, 500)
+        XCTAssertEqual(threadCount, 2200)
+        XCTAssertFalse(isOverloaded)
+    }
+    
+    func testOverloadedStateDetection() {
+        let metrics = MMLoadAverageProvider.calculateLoadMetrics(
+            withLoad1: 12.0,
+            load5: 10.0,
+            load15: 8.0,
+            taskCount: 650,
+            threadCount: 3100,
+            cpuCount: 8,
+            machFactor: 0.4
+        )
+        
+        let isOverloaded = metrics["isOverloaded"] as? Bool ?? false
+        let norm1 = metrics["normalizedLoad1m"] as? Double ?? 0
+        
+        XCTAssertTrue(isOverloaded)
+        XCTAssertEqual(norm1, 1.5, accuracy: 0.01)
+    }
+    
+    func testLiveLoadAverageProvider() throws {
+        let provider = MMLoadAverageProvider()
+        XCTAssertEqual(provider.domain, .system)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.system.load")
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["load1m"])
+        XCTAssertNotNil(sample["taskCount"])
+        XCTAssertNotNil(sample["threadCount"])
+        XCTAssertNotNil(sample["normalizedLoad1m"])
+    }
+}

Tests/MMPowerTests.swift

@@ -0,0 +1,101 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMPowerTests: XCTestCase {
+    
+    func testUnitsAndNames() {
+        XCTAssertEqual(MMPowerTelemetryProvider.unit(forKey: "PSTR"), "W")
+        XCTAssertEqual(MMPowerTelemetryProvider.unit(forKey: "VC0C"), "V")
+        XCTAssertEqual(MMPowerTelemetryProvider.unit(forKey: "IC0C"), "A")
+        XCTAssertEqual(MMPowerTelemetryProvider.unit(forKey: "UNKNOWN"), "")
+        
+        XCTAssertEqual(MMPowerTelemetryProvider.humanReadableName(forKey: "PSTR"), "Total System Power")
+        XCTAssertEqual(MMPowerTelemetryProvider.humanReadableName(forKey: "VC0C"), "CPU Core Voltage")
+        XCTAssertEqual(MMPowerTelemetryProvider.humanReadableName(forKey: "IC0C"), "CPU Core Current")
+    }
+    
+    func testPowerMetricsCalculationFromSMC() {
+        let readings: [String: NSNumber] = [
+            "PSTR": NSNumber(value: 45.2),
+            "PCPR": NSNumber(value: 28.4),
+            "PG0R": NSNumber(value: 8.5),
+            "PMSR": NSNumber(value: 3.1),
+            "VC0C": NSNumber(value: 1.15),
+            "IC0C": NSNumber(value: 24.5)
+        ]
+        
+        let batteryInfo: [String: Any] = [
+            "powerSource": "AC Power",
+            "isCharging": false,
+            "batteryLevel": 100.0,
+            "batteryWatts": 0.0
+        ]
+        
+        let metrics = MMPowerTelemetryProvider.calculatePowerMetrics(
+            withReadings: readings,
+            batteryInfo: batteryInfo
+        )
+        
+        let systemWatts = metrics["systemTotalWatts"] as? Double ?? 0
+        let cpuWatts = metrics["cpuWatts"] as? Double ?? 0
+        let gpuWatts = metrics["gpuWatts"] as? Double ?? 0
+        let memWatts = metrics["memoryWatts"] as? Double ?? 0
+        let cpuV = metrics["cpuVoltage"] as? Double ?? 0
+        let cpuI = metrics["cpuCurrent"] as? Double ?? 0
+        let powerSource = metrics["powerSource"] as? String ?? ""
+        let sensors = metrics["sensors"] as? [[String: Any]] ?? []
+        
+        XCTAssertEqual(systemWatts, 45.2, accuracy: 0.1)
+        XCTAssertEqual(cpuWatts, 28.4, accuracy: 0.1)
+        XCTAssertEqual(gpuWatts, 8.5, accuracy: 0.1)
+        XCTAssertEqual(memWatts, 3.1, accuracy: 0.1)
+        XCTAssertEqual(cpuV, 1.15, accuracy: 0.01)
+        XCTAssertEqual(cpuI, 24.5, accuracy: 0.1)
+        XCTAssertEqual(powerSource, "AC Power")
+        XCTAssertEqual(sensors.count, 6)
+    }
+    
+    func testBatteryFallbackCalculation() {
+        // No PSTR, no PCPR, but VC0C and IC0C are present
+        let readings: [String: NSNumber] = [
+            "VC0C": NSNumber(value: 1.2),
+            "IC0C": NSNumber(value: 10.0)
+        ]
+        
+        let batteryInfo: [String: Any] = [
+            "powerSource": "Battery Power",
+            "isCharging": false,
+            "batteryLevel": 75.0,
+            "batteryWatts": 18.5
+        ]
+        
+        let metrics = MMPowerTelemetryProvider.calculatePowerMetrics(
+            withReadings: readings,
+            batteryInfo: batteryInfo
+        )
+        
+        let systemWatts = metrics["systemTotalWatts"] as? Double ?? 0
+        let cpuWatts = metrics["cpuWatts"] as? Double ?? 0
+        let powerSource = metrics["powerSource"] as? String ?? ""
+        let isCharging = metrics["isCharging"] as? Bool ?? true
+        
+        // System watts falls back to batteryWatts (18.5)
+        XCTAssertEqual(systemWatts, 18.5, accuracy: 0.1)
+        // CPU watts calculated from V * I = 1.2 * 10.0 = 12.0 W
+        XCTAssertEqual(cpuWatts, 12.0, accuracy: 0.1)
+        XCTAssertEqual(powerSource, "Battery Power")
+        XCTAssertFalse(isCharging)
+    }
+    
+    func testLivePowerProvider() throws {
+        let provider = MMPowerTelemetryProvider()
+        XCTAssertEqual(provider.domain, .power)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.power")
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["systemTotalWatts"])
+        XCTAssertNotNil(sample["powerSource"])
+        XCTAssertNotNil(sample["sensors"])
+    }
+}

Tests/MacMonitorTests.swift

@@ -23,4 +23,15 @@ final class MacMonitorCoreTests: XCTestCase {
         let thermalStr = MMTelemetryDomainToString(.thermal)
         XCTAssertEqual(thermalStr, "Thermal")
     }
+    
+    @MainActor
+    func testSystemTelemetryStoreInitialStateAndProviders() {
+        let store = SystemTelemetryStore.shared
+        XCTAssertNotNil(store)
+        XCTAssertEqual(store.registeredProviderCount, 7)
+        XCTAssertFalse(store.hostModel.isEmpty)
+        XCTAssertFalse(store.kernelVersion.isEmpty)
+        XCTAssertGreaterThanOrEqual(store.physicalCpuCount, 1)
+        XCTAssertGreaterThanOrEqual(store.logicalCpuCount, 1)
+    }
 }