feat(telemetry): implement kernel context switching and event counter provider (fixes #6)

MacMonitor.xcodeproj/project.pbxproj

@@ -7,16 +7,30 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
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+		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 */; };
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+		E6F2F695B8D3E7045967C082 /* MMFanTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 336CEE35A745F3C7E9F70F43 /* MMFanTests.swift */; };
 		EAFAF5A10502D4ACC64F4720 /* MMTelemetryCoordinator.m in Sources */ = {isa = PBXBuildFile; fileRef = F9F9AD1268F906761032AF4D /* MMTelemetryCoordinator.m */; };
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+		F2F7A141F2452EC1B4FB45D8 /* MMStorageTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 6DCBCEA450103E2404761B78 /* MMStorageTelemetryProvider.m */; };
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@@ -31,19 +45,40 @@
 
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+		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>"; };
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+		336CEE35A745F3C7E9F70F43 /* MMFanTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMFanTests.swift; sourceTree = "<group>"; };
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+		3CFC5B905E428A6B854E0AB4 /* MMFanTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMFanTelemetryProvider.h; sourceTree = "<group>"; };
+		46DE3AE12DAE26C4FE58034C /* MMStorageTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMStorageTelemetryProvider.h; sourceTree = "<group>"; };
+		4CE92B1A8D7FDBB6499448E1 /* MMCPULoadTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMCPULoadTests.swift; sourceTree = "<group>"; };
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+		57845310A3D4EC67E48A3B11 /* MMCPULoadProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMCPULoadProvider.h; sourceTree = "<group>"; };
+		62C377EFD025D6A6B5563E77 /* MMCPUThermalProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMCPUThermalProvider.m; sourceTree = "<group>"; };
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+		78325870C7CD8312AECA2236 /* MMStorageTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMStorageTests.swift; sourceTree = "<group>"; };
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 		940D608A1AF80F75584E744E /* MMSMCTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMSMCTests.swift; sourceTree = "<group>"; };
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 		ADEA6BD38BA8D887B1DB64A9 /* MacMonitorApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MacMonitorApp.swift; sourceTree = "<group>"; };
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+		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>"; };
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@@ -79,6 +114,7 @@
 				4D8D8B40632C525CBC1D0E43 /* App */,
 				54787E6270EA7B9A1BE11359 /* Core */,
 				9844EC526E3527F6A582179F /* Hardware */,
+				8BF79E3BCB76E7A1669DC930 /* Telemetry */,
 				3E4A0B53C583BD0B7A68EACE /* UI */,
 			);
 			path = Sources;
@@ -112,6 +148,37 @@
 			path = Core;
 			sourceTree = "<group>";
 		};
+		78383CED205BCA772701AE48 /* CPU */ = {
+			isa = PBXGroup;
+			children = (
+				57845310A3D4EC67E48A3B11 /* MMCPULoadProvider.h */,
+				D68FC8100D08DB6202F46339 /* MMCPULoadProvider.m */,
+			);
+			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 */,
+			);
+			path = Telemetry;
+			sourceTree = "<group>";
+		};
 		9844EC526E3527F6A582179F /* Hardware */ = {
 			isa = PBXGroup;
 			children = (
@@ -120,6 +187,24 @@
 			path = Hardware;
 			sourceTree = "<group>";
 		};
+		AD2995435E44FA3E1790A4F3 /* Fan */ = {
+			isa = PBXGroup;
+			children = (
+				3CFC5B905E428A6B854E0AB4 /* MMFanTelemetryProvider.h */,
+				C9ED8F75E082D4F8AC2FF2F5 /* MMFanTelemetryProvider.m */,
+			);
+			path = Fan;
+			sourceTree = "<group>";
+		};
+		B6EB3F6545276C40212C2992 /* Storage */ = {
+			isa = PBXGroup;
+			children = (
+				46DE3AE12DAE26C4FE58034C /* MMStorageTelemetryProvider.h */,
+				6DCBCEA450103E2404761B78 /* MMStorageTelemetryProvider.m */,
+			);
+			path = Storage;
+			sourceTree = "<group>";
+		};
 		C80C3EEE8F912F4B214102E3 /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -133,11 +218,29 @@
 			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 */,
 			);
 			path = Tests;
 			sourceTree = "<group>";
 		};
+		DBDC37231C01F0A2D4A7FC73 /* Thermal */ = {
+			isa = PBXGroup;
+			children = (
+				09475741B5D0D4B89B863C3D /* MMComponentThermalProvider.h */,
+				C65F5835516BC2A65BCE25D2 /* MMComponentThermalProvider.m */,
+				D73CCC7B5E6BF1825EA68E2B /* MMCPUThermalProvider.h */,
+				62C377EFD025D6A6B5563E77 /* MMCPUThermalProvider.m */,
+			);
+			path = Thermal;
+			sourceTree = "<group>";
+		};
 		E012FBB26EF9E35A2FAF87E2 /* AppleSMC */ = {
 			isa = PBXGroup;
 			children = (
@@ -159,6 +262,15 @@
 			name = Frameworks;
 			sourceTree = "<group>";
 		};
+		EE2F5EFC9DC33CEDA79A131F /* Memory */ = {
+			isa = PBXGroup;
+			children = (
+				0130BD1E18972DF9E2955334 /* MMMemoryTelemetryProvider.h */,
+				991AEEAF262F3C6BE930BC77 /* MMMemoryTelemetryProvider.m */,
+			);
+			path = Memory;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -234,7 +346,14 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			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 */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -245,7 +364,14 @@
 			files = (
 				A9FCAEC0BF27A419DB148C4A /* ContentView.swift in Sources */,
 				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 */,
 				88387CDAE2AC1CC74EF89B57 /* MacMonitorApp.swift in Sources */,
 				A7609CE56D49EC3419987468 /* SystemTelemetryStore.swift 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

@@ -11,4 +11,14 @@
 #import "MMSMCParser.h"
 #import "MMAppleSMCClient.h"
 
+// Telemetry Providers
+#import "MMCPULoadProvider.h"
+#import "MMMemoryTelemetryProvider.h"
+#import "MMStorageTelemetryProvider.h"
+#import "MMCPUThermalProvider.h"
+#import "MMFanTelemetryProvider.h"
+#import "MMComponentThermalProvider.h"
+#import "MMPowerTelemetryProvider.h"
+#import "MMKernelTelemetryProvider.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/CPU/MMCPULoadProvider.h

@@ -0,0 +1,31 @@
+#ifndef MMCPULoadProvider_h
+#define MMCPULoadProvider_h
+
+#import <Foundation/Foundation.h>
+#import <mach/mach.h>
+#import <mach/processor_info.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMCPULoadProvider
+ * Samples real-time Mach host processor CPU load ticks, per-core utilization percentages,
+ * and CPU operating frequency.
+ */
+@interface MMCPULoadProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, readonly) natural_t coreCount;
+
+/**
+ * Static calculator method facilitating deterministic unit testing with mock tick data.
+ */
++ (NSDictionary<NSString *, id> *)calculateLoadFromPreviousTicks:(const struct processor_cpu_load_info * _Nullable)prevTicks
+                                                    currentTicks:(const struct processor_cpu_load_info *)currTicks
+                                                       coreCount:(natural_t)coreCount;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMCPULoadProvider_h */

Sources/Telemetry/CPU/MMCPULoadProvider.m

@@ -0,0 +1,201 @@
+#import "MMCPULoadProvider.h"
+#import <sys/sysctl.h>
+#import <os/lock.h>
+
+@interface MMCPULoadProvider () {
+    os_unfair_lock _lock;
+    processor_cpu_load_info_t _previousCpuInfo;
+    mach_msg_type_number_t _previousCpuInfoCount;
+    natural_t _coreCount;
+    uint64_t _maxFrequencyHz;
+}
+@end
+
+@implementation MMCPULoadProvider
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        _lock = OS_UNFAIR_LOCK_INIT;
+        _previousCpuInfo = NULL;
+        _previousCpuInfoCount = 0;
+        
+        // Read CPU core count
+        natural_t cCount = 1;
+        size_t size = sizeof(cCount);
+        sysctlbyname("hw.logicalcpu", &cCount, &size, NULL, 0);
+        _coreCount = cCount;
+        
+        // Read maximum frequency
+        uint64_t maxFreq = 0;
+        size = sizeof(maxFreq);
+        if (sysctlbyname("hw.cpufrequency_max", &maxFreq, &size, NULL, 0) != 0) {
+            sysctlbyname("hw.cpufrequency", &maxFreq, &size, NULL, 0);
+        }
+        _maxFrequencyHz = maxFreq;
+    }
+    return self;
+}
+
+- (void)dealloc {
+    if (_previousCpuInfo != NULL) {
+        free(_previousCpuInfo);
+        _previousCpuInfo = NULL;
+    }
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainCPU;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.cpuload";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
+- (natural_t)coreCount {
+    return _coreCount;
+}
+
++ (NSDictionary<NSString *, id> *)calculateLoadFromPreviousTicks:(const struct processor_cpu_load_info * _Nullable)prevTicks
+                                                    currentTicks:(const struct processor_cpu_load_info *)currTicks
+                                                       coreCount:(natural_t)coreCount {
+    if (!currTicks || coreCount == 0) return @{};
+    
+    NSMutableArray<NSDictionary<NSString *, NSNumber *> *> *coresList = [NSMutableArray arrayWithCapacity:coreCount];
+    double totalUserPercent = 0.0;
+    double totalSystemPercent = 0.0;
+    double totalIdlePercent = 0.0;
+    double totalActivePercent = 0.0;
+    
+    for (natural_t i = 0; i < coreCount; i++) {
+        uint64_t user = currTicks[i].cpu_ticks[CPU_STATE_USER];
+        uint64_t system = currTicks[i].cpu_ticks[CPU_STATE_SYSTEM];
+        uint64_t idle = currTicks[i].cpu_ticks[CPU_STATE_IDLE];
+        uint64_t nice = currTicks[i].cpu_ticks[CPU_STATE_NICE];
+        
+        uint64_t deltaUser = 0;
+        uint64_t deltaSystem = 0;
+        uint64_t deltaIdle = 0;
+        uint64_t deltaNice = 0;
+        
+        if (prevTicks != NULL) {
+            deltaUser = (user >= prevTicks[i].cpu_ticks[CPU_STATE_USER]) ? (user - prevTicks[i].cpu_ticks[CPU_STATE_USER]) : 0;
+            deltaSystem = (system >= prevTicks[i].cpu_ticks[CPU_STATE_SYSTEM]) ? (system - prevTicks[i].cpu_ticks[CPU_STATE_SYSTEM]) : 0;
+            deltaIdle = (idle >= prevTicks[i].cpu_ticks[CPU_STATE_IDLE]) ? (idle - prevTicks[i].cpu_ticks[CPU_STATE_IDLE]) : 0;
+            deltaNice = (nice >= prevTicks[i].cpu_ticks[CPU_STATE_NICE]) ? (nice - prevTicks[i].cpu_ticks[CPU_STATE_NICE]) : 0;
+        }
+        
+        uint64_t deltaTotal = deltaUser + deltaSystem + deltaIdle + deltaNice;
+        double uPct = 0.0, sPct = 0.0, iPct = 100.0, aPct = 0.0;
+        
+        if (deltaTotal > 0) {
+            uPct = ((double)deltaUser / (double)deltaTotal) * 100.0;
+            sPct = ((double)deltaSystem / (double)deltaTotal) * 100.0;
+            iPct = ((double)deltaIdle / (double)deltaTotal) * 100.0;
+            aPct = 100.0 - iPct;
+            if (aPct < 0.0) aPct = 0.0;
+            if (aPct > 100.0) aPct = 100.0;
+        }
+        
+        totalUserPercent += uPct;
+        totalSystemPercent += sPct;
+        totalIdlePercent += iPct;
+        totalActivePercent += aPct;
+        
+        [coresList addObject:@{
+            @"coreIndex": @(i),
+            @"userPercent": @(uPct),
+            @"systemPercent": @(sPct),
+            @"idlePercent": @(iPct),
+            @"totalPercent": @(aPct)
+        }];
+    }
+    
+    double avgUser = coreCount > 0 ? (totalUserPercent / coreCount) : 0.0;
+    double avgSystem = coreCount > 0 ? (totalSystemPercent / coreCount) : 0.0;
+    double avgIdle = coreCount > 0 ? (totalIdlePercent / coreCount) : 100.0;
+    double avgTotal = coreCount > 0 ? (totalActivePercent / coreCount) : 0.0;
+    
+    return @{
+        @"cores": coresList,
+        @"coreCount": @(coreCount),
+        @"userPercent": @(avgUser),
+        @"systemPercent": @(avgSystem),
+        @"idlePercent": @(avgIdle),
+        @"totalPercent": @(avgTotal)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    natural_t numCPUs = 0;
+    processor_info_array_t cpuInfo = NULL;
+    mach_msg_type_number_t numCpuInfo = 0;
+    
+    kern_return_t kr = host_processor_info(
+        mach_host_self(),
+        PROCESSOR_CPU_LOAD_INFO,
+        &numCPUs,
+        &cpuInfo,
+        &numCpuInfo
+    );
+    
+    if (kr != KERN_SUCCESS || cpuInfo == NULL) {
+        if (error) {
+            *error = [NSError errorWithDomain:@"com.i3omb.MacMonitor.CPU"
+                                         code:kr
+                                     userInfo:@{NSLocalizedDescriptionKey: @"host_processor_info failed to read CPU ticks"}];
+        }
+        return nil;
+    }
+    
+    os_unfair_lock_lock(&_lock);
+    
+    processor_cpu_load_info_t currentCpuInfo = (processor_cpu_load_info_t)cpuInfo;
+    NSDictionary<NSString *, id> *metrics = [MMCPULoadProvider calculateLoadFromPreviousTicks:_previousCpuInfo
+                                                                                 currentTicks:currentCpuInfo
+                                                                                    coreCount:numCPUs];
+    
+    // Free previous malloc buffer
+    if (_previousCpuInfo != NULL) {
+        free(_previousCpuInfo);
+        _previousCpuInfo = NULL;
+    }
+    
+    // Allocate new buffer to preserve state for the next delta
+    vm_size_t bufferSize = numCpuInfo * sizeof(integer_t);
+    _previousCpuInfo = (processor_cpu_load_info_t)malloc(bufferSize);
+    if (_previousCpuInfo != NULL) {
+        memcpy(_previousCpuInfo, cpuInfo, bufferSize);
+        _previousCpuInfoCount = numCpuInfo;
+    }
+    
+    // Deallocate the buffer returned by the kernel
+    vm_deallocate(mach_task_self(), (vm_address_t)cpuInfo, numCpuInfo * sizeof(integer_t));
+    
+    os_unfair_lock_unlock(&_lock);
+    
+    // Read current frequency
+    uint64_t currentFreq = 0;
+    size_t size = sizeof(currentFreq);
+    if (sysctlbyname("hw.cpufrequency", &currentFreq, &size, NULL, 0) != 0) {
+        currentFreq = _maxFrequencyHz;
+    }
+    
+    // Thermal State
+    NSProcessInfoThermalState thermalState = [NSProcessInfo processInfo].thermalState;
+    BOOL isThrottled = (thermalState >= NSProcessInfoThermalStateSerious);
+    
+    NSMutableDictionary<NSString *, id> *result = [metrics mutableCopy];
+    result[@"frequencyHz"] = @(currentFreq);
+    result[@"maxFrequencyHz"] = @(_maxFrequencyHz);
+    result[@"thermalState"] = @(thermalState);
+    result[@"isThrottled"] = @(isThrottled);
+    
+    return [result copy];
+}
+
+@end

Sources/Telemetry/Fan/MMFanTelemetryProvider.h

@@ -0,0 +1,31 @@
+#ifndef MMFanTelemetryProvider_h
+#define MMFanTelemetryProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+#import "MMAppleSMCClient.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMFanTelemetryProvider
+ * Samples multi-fan telemetry from AppleSMC: current RPM, min RPM, max RPM, target RPM,
+ * and fan utilization percentages.
+ */
+@interface MMFanTelemetryProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, strong, readonly) MMAppleSMCClient *smcClient;
+@property (nonatomic, readonly) NSInteger fanCount;
+
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client;
+
+/**
+ * Static calculator method for deterministic unit testing.
+ */
++ (NSDictionary<NSString *, id> *)calculateFanMetricsFromFanList:(NSArray<NSDictionary<NSString *, NSNumber *> *> *)fanList;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMFanTelemetryProvider_h */

Sources/Telemetry/Fan/MMFanTelemetryProvider.m

@@ -0,0 +1,147 @@
+#import "MMFanTelemetryProvider.h"
+
+@interface MMFanTelemetryProvider () {
+    MMAppleSMCClient *_smcClient;
+    NSInteger _probedFanCount;
+}
+@end
+
+@implementation MMFanTelemetryProvider
+
+- (instancetype)init {
+    return [self initWithSMCClient:[MMAppleSMCClient sharedClient]];
+}
+
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client {
+    self = [super init];
+    if (self) {
+        _smcClient = client;
+        _probedFanCount = -1;
+        [self probeFans];
+    }
+    return self;
+}
+
+- (void)probeFans {
+    if (!_smcClient.isAvailable) return;
+    
+    NSNumber *num = [_smcClient readNumericValueForKey:@"FNum" error:nil];
+    if (num) {
+        _probedFanCount = [num integerValue];
+    } else {
+        // Fallback probe F0Ac
+        NSNumber *f0 = [_smcClient readNumericValueForKey:@"F0Ac" error:nil];
+        if (f0 && [f0 doubleValue] >= 0.0) {
+            _probedFanCount = 1;
+            NSNumber *f1 = [_smcClient readNumericValueForKey:@"F1Ac" error:nil];
+            if (f1 && [f1 doubleValue] >= 0.0) {
+                _probedFanCount = 2;
+            }
+        } else {
+            _probedFanCount = 0;
+        }
+    }
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainFan;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.fan";
+}
+
+- (BOOL)isAvailable {
+    return _smcClient.isAvailable;
+}
+
+- (MMAppleSMCClient *)smcClient {
+    return _smcClient;
+}
+
+- (NSInteger)fanCount {
+    return (_probedFanCount >= 0) ? _probedFanCount : 0;
+}
+
++ (NSDictionary<NSString *, id> *)calculateFanMetricsFromFanList:(NSArray<NSDictionary<NSString *, NSNumber *> *> *)fanList {
+    if (!fanList || fanList.count == 0) {
+        return @{
+            @"fanCount": @(0),
+            @"fans": @[],
+            @"averageRPM": @(0.0),
+            @"peakRPM": @(0.0)
+        };
+    }
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *resultList = [NSMutableArray arrayWithCapacity:fanList.count];
+    double sumRPM = 0.0;
+    double peakRPM = 0.0;
+    
+    for (NSUInteger i = 0; i < fanList.count; i++) {
+        NSDictionary<NSString *, NSNumber *> *raw = fanList[i];
+        double current = [raw[@"currentRPM"] doubleValue];
+        double min = [raw[@"minRPM"] doubleValue];
+        double max = [raw[@"maxRPM"] doubleValue];
+        double target = [raw[@"targetRPM"] doubleValue];
+        
+        double util = 0.0;
+        if (max > min && current >= min) {
+            util = ((current - min) / (max - min)) * 100.0;
+            if (util < 0.0) util = 0.0;
+            if (util > 100.0) util = 100.0;
+        }
+        
+        if (current > peakRPM) peakRPM = current;
+        sumRPM += current;
+        
+        [resultList addObject:@{
+            @"fanIndex": @(i),
+            @"currentRPM": @(current),
+            @"minRPM": @(min),
+            @"maxRPM": @(max),
+            @"targetRPM": @(target),
+            @"utilizationPercent": @(util)
+        }];
+    }
+    
+    double avgRPM = fanList.count > 0 ? (sumRPM / fanList.count) : 0.0;
+    
+    return @{
+        @"fanCount": @(fanList.count),
+        @"fans": [resultList copy],
+        @"averageRPM": @(avgRPM),
+        @"peakRPM": @(peakRPM)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    if (_probedFanCount < 0 && _smcClient.isAvailable) {
+        [self probeFans];
+    }
+    
+    NSInteger count = [self fanCount];
+    NSMutableArray<NSDictionary<NSString *, NSNumber *> *> *rawList = [NSMutableArray arrayWithCapacity:count];
+    
+    for (NSInteger i = 0; i < count; i++) {
+        NSString *acKey = [NSString stringWithFormat:@"F%ldAc", (long)i];
+        NSString *mnKey = [NSString stringWithFormat:@"F%ldMn", (long)i];
+        NSString *mxKey = [NSString stringWithFormat:@"F%ldMx", (long)i];
+        NSString *tgKey = [NSString stringWithFormat:@"F%ldTg", (long)i];
+        
+        NSNumber *ac = [_smcClient readNumericValueForKey:acKey error:nil] ?: @(0.0);
+        NSNumber *mn = [_smcClient readNumericValueForKey:mnKey error:nil] ?: @(0.0);
+        NSNumber *mx = [_smcClient readNumericValueForKey:mxKey error:nil] ?: @(6000.0);
+        NSNumber *tg = [_smcClient readNumericValueForKey:tgKey error:nil] ?: ac;
+        
+        [rawList addObject:@{
+            @"currentRPM": ac,
+            @"minRPM": mn,
+            @"maxRPM": mx,
+            @"targetRPM": tg
+        }];
+    }
+    
+    return [MMFanTelemetryProvider calculateFanMetricsFromFanList:rawList];
+}
+
+@end

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/Memory/MMMemoryTelemetryProvider.h

@@ -0,0 +1,32 @@
+#ifndef MMMemoryTelemetryProvider_h
+#define MMMemoryTelemetryProvider_h
+
+#import <Foundation/Foundation.h>
+#import <mach/mach.h>
+#import <sys/sysctl.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMMemoryTelemetryProvider
+ * Samples Mach virtual memory statistics, wired/active/inactive/compressed memory allocations,
+ * swap usage, and system-wide memory pressure levels.
+ */
+@interface MMMemoryTelemetryProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, readonly) uint64_t totalPhysicalMemoryBytes;
+
+/**
+ * Deterministic helper method for unit testing VM metric calculations.
+ */
++ (NSDictionary<NSString *, id> *)calculateMemoryMetricsWithVMInfo:(const vm_statistics64_data_t *)vmInfo
+                                                           pageSize:(vm_size_t)pageSize
+                                                   totalPhysicalRAM:(uint64_t)totalRAM
+                                                          swapUsage:(const struct xsw_usage * _Nullable)swap;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMMemoryTelemetryProvider_h */

Sources/Telemetry/Memory/MMMemoryTelemetryProvider.m

@@ -0,0 +1,135 @@
+#import "MMMemoryTelemetryProvider.h"
+#import <sys/sysctl.h>
+
+@interface MMMemoryTelemetryProvider () {
+    uint64_t _totalPhysicalMemoryBytes;
+    vm_size_t _pageSize;
+}
+@end
+
+@implementation MMMemoryTelemetryProvider
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        // Read physical memory size
+        uint64_t memSize = 0;
+        size_t size = sizeof(memSize);
+        sysctlbyname("hw.memsize", &memSize, &size, NULL, 0);
+        _totalPhysicalMemoryBytes = memSize;
+        
+        // Read virtual memory page size
+        vm_size_t pSize = 4096;
+        host_page_size(mach_host_self(), &pSize);
+        _pageSize = pSize;
+    }
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainMemory;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.memory";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
+- (uint64_t)totalPhysicalMemoryBytes {
+    return _totalPhysicalMemoryBytes;
+}
+
++ (NSDictionary<NSString *, id> *)calculateMemoryMetricsWithVMInfo:(const vm_statistics64_data_t *)vmInfo
+                                                           pageSize:(vm_size_t)pageSize
+                                                   totalPhysicalRAM:(uint64_t)totalRAM
+                                                          swapUsage:(const struct xsw_usage * _Nullable)swap {
+    if (!vmInfo) return @{};
+    
+    uint64_t appMemory = (vmInfo->internal_page_count > vmInfo->purgeable_count)
+        ? (uint64_t)(vmInfo->internal_page_count - vmInfo->purgeable_count) * pageSize
+        : 0;
+    uint64_t wired = (uint64_t)vmInfo->wire_count * pageSize;
+    uint64_t compressed = (uint64_t)vmInfo->compressor_page_count * pageSize;
+    uint64_t used = appMemory + wired + compressed;
+    
+    uint64_t freeRAM = (uint64_t)vmInfo->free_count * pageSize;
+    uint64_t purgeable = (uint64_t)vmInfo->purgeable_count * pageSize;
+    uint64_t active = (uint64_t)vmInfo->active_count * pageSize;
+    uint64_t inactive = (uint64_t)vmInfo->inactive_count * pageSize;
+    
+    // Calculate Memory Pressure percentage
+    uint64_t availableForUse = (uint64_t)(vmInfo->free_count + vmInfo->inactive_count) * pageSize;
+    double pressurePct = 0.0;
+    if (totalRAM > 0) {
+        pressurePct = (1.0 - ((double)availableForUse / (double)totalRAM)) * 100.0;
+        if (pressurePct < 0.0) pressurePct = 0.0;
+        if (pressurePct > 100.0) pressurePct = 100.0;
+    }
+    
+    NSString *pressureStatus = @"Normal";
+    if (pressurePct >= 80.0) {
+        pressureStatus = @"Critical";
+    } else if (pressurePct >= 60.0) {
+        pressureStatus = @"Warning";
+    }
+    
+    uint64_t swapTotal = swap ? swap->xsu_total : 0;
+    uint64_t swapUsed = swap ? swap->xsu_used : 0;
+    uint64_t swapFree = swap ? swap->xsu_avail : 0;
+    
+    return @{
+        @"totalBytes": @(totalRAM),
+        @"usedBytes": @(used),
+        @"freeBytes": @(freeRAM),
+        @"appMemoryBytes": @(appMemory),
+        @"wiredBytes": @(wired),
+        @"compressedBytes": @(compressed),
+        @"purgeableBytes": @(purgeable),
+        @"activeBytes": @(active),
+        @"inactiveBytes": @(inactive),
+        @"memoryPressurePercent": @(pressurePct),
+        @"memoryPressureStatus": pressureStatus,
+        @"swapTotalBytes": @(swapTotal),
+        @"swapUsedBytes": @(swapUsed),
+        @"swapFreeBytes": @(swapFree)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    vm_statistics64_data_t vmInfo = {0};
+    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)&vmInfo,
+        &count
+    );
+    
+    if (kr != KERN_SUCCESS) {
+        if (error) {
+            *error = [NSError errorWithDomain:@"com.i3omb.MacMonitor.Memory"
+                                         code:kr
+                                     userInfo:@{NSLocalizedDescriptionKey: @"host_statistics64 failed to sample VM metrics"}];
+        }
+        return nil;
+    }
+    
+    // Read swap usage
+    struct xsw_usage swap = {0};
+    size_t swapSize = sizeof(swap);
+    struct xsw_usage *swapPtr = NULL;
+    if (sysctlbyname("vm.swapusage", &swap, &swapSize, NULL, 0) == 0) {
+        swapPtr = &swap;
+    }
+    
+    return [MMMemoryTelemetryProvider calculateMemoryMetricsWithVMInfo:&vmInfo
+                                                              pageSize:_pageSize
+                                                      totalPhysicalRAM:_totalPhysicalMemoryBytes
+                                                             swapUsage:swapPtr];
+}
+
+@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/MMStorageTelemetryProvider.h

@@ -0,0 +1,26 @@
+#ifndef MMStorageTelemetryProvider_h
+#define MMStorageTelemetryProvider_h
+
+#import <Foundation/Foundation.h>
+#import <sys/mount.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMStorageTelemetryProvider
+ * Samples mounted disk volumes, APFS containers, used/free storage capacity,
+ * and mount filesystem attributes.
+ */
+@interface MMStorageTelemetryProvider : NSObject <MMTelemetryProvider>
+
+/**
+ * Static parser method for converting statfs structures into volume dictionaries.
+ */
++ (NSArray<NSDictionary<NSString *, id> *> *)parseStatFSBuffer:(const struct statfs *)buffer count:(int)count;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMStorageTelemetryProvider_h */

Sources/Telemetry/Storage/MMStorageTelemetryProvider.m

@@ -0,0 +1,108 @@
+#import "MMStorageTelemetryProvider.h"
+
+@implementation MMStorageTelemetryProvider
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainStorage;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.storage";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
++ (NSArray<NSDictionary<NSString *, id> *> *)parseStatFSBuffer:(const struct statfs *)buffer count:(int)count {
+    if (!buffer || count <= 0) return @[];
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *volumes = [NSMutableArray arrayWithCapacity:count];
+    
+    for (int i = 0; i < count; i++) {
+        const struct statfs *mnt = &buffer[i];
+        
+        // Only include local mounts
+        if (!(mnt->f_flags & MNT_LOCAL)) {
+            continue;
+        }
+        
+        NSString *mountPoint = [NSString stringWithUTF8String:mnt->f_mntonname];
+        NSString *deviceName = [NSString stringWithUTF8String:mnt->f_mntfromname];
+        NSString *fsType = [NSString stringWithUTF8String:mnt->f_fstypename];
+        
+        // Exclude virtual/internal devfs, autodefs, and synthetic system roots
+        if ([fsType isEqualToString:@"devfs"] ||
+            [fsType isEqualToString:@"autofs"] ||
+            [mountPoint hasPrefix:@"/System/Volumes/Data/"] ||
+            [deviceName containsString:@"com.apple.os.update"]) {
+            continue;
+        }
+        
+        uint64_t blockSize = (uint64_t)mnt->f_bsize;
+        uint64_t totalBytes = (uint64_t)mnt->f_blocks * blockSize;
+        uint64_t freeBytes = (uint64_t)mnt->f_bfree * blockSize;
+        uint64_t availBytes = (uint64_t)mnt->f_bavail * blockSize;
+        uint64_t usedBytes = (totalBytes >= freeBytes) ? (totalBytes - freeBytes) : 0;
+        
+        if (totalBytes == 0) continue;
+        
+        double usedPercent = ((double)usedBytes / (double)totalBytes) * 100.0;
+        if (usedPercent < 0.0) usedPercent = 0.0;
+        if (usedPercent > 100.0) usedPercent = 100.0;
+        
+        NSString *volumeName = [mountPoint lastPathComponent];
+        if ([mountPoint isEqualToString:@"/"]) {
+            volumeName = @"Macintosh HD";
+        }
+        
+        BOOL isReadOnly = (mnt->f_flags & MNT_RDONLY) != 0;
+        
+        [volumes addObject:@{
+            @"volumeName": volumeName,
+            @"mountPoint": mountPoint,
+            @"devicePath": deviceName,
+            @"fsType": fsType,
+            @"totalBytes": @(totalBytes),
+            @"usedBytes": @(usedBytes),
+            @"freeBytes": @(freeBytes),
+            @"availableBytes": @(availBytes),
+            @"usedPercent": @(usedPercent),
+            @"isReadOnly": @(isReadOnly)
+        }];
+    }
+    
+    return [volumes copy];
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    struct statfs *mntbuf = NULL;
+    int count = getmntinfo(&mntbuf, MNT_WAIT);
+    
+    if (count <= 0 || mntbuf == NULL) {
+        if (error) {
+            *error = [NSError errorWithDomain:@"com.i3omb.MacMonitor.Storage"
+                                         code:-1
+                                     userInfo:@{NSLocalizedDescriptionKey: @"getmntinfo returned no mounted filesystems"}];
+        }
+        return nil;
+    }
+    
+    NSArray *volumes = [MMStorageTelemetryProvider parseStatFSBuffer:mntbuf count:count];
+    
+    uint64_t totalStorage = 0;
+    uint64_t totalUsed = 0;
+    for (NSDictionary *v in volumes) {
+        totalStorage += [v[@"totalBytes"] unsignedLongLongValue];
+        totalUsed += [v[@"usedBytes"] unsignedLongLongValue];
+    }
+    
+    return @{
+        @"volumes": volumes,
+        @"volumeCount": @(volumes.count),
+        @"aggregateTotalBytes": @(totalStorage),
+        @"aggregateUsedBytes": @(totalUsed)
+    };
+}
+
+@end

Sources/Telemetry/Thermal/MMCPUThermalProvider.h

@@ -0,0 +1,34 @@
+#ifndef MMCPUThermalProvider_h
+#define MMCPUThermalProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+#import "MMAppleSMCClient.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMCPUThermalProvider
+ * Samples real-time CPU die, proximity, and per-core temperature sensors from AppleSMC
+ * alongside OS thermal pressure states.
+ */
+@interface MMCPUThermalProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, strong, readonly) MMAppleSMCClient *smcClient;
+@property (nonatomic, readonly) NSArray<NSString *> *discoveredCoreKeys;
+@property (nonatomic, readonly, nullable) NSString *packageKey;
+
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client;
+
+/**
+ * Static calculator method for deterministic unit testing.
+ */
++ (NSDictionary<NSString *, id> *)calculateThermalMetricsWithPackageTemp:(nullable NSNumber *)pkgTemp
+                                                               coreTemps:(NSDictionary<NSString *, NSNumber *> *)coreDict
+                                                            thermalState:(NSProcessInfoThermalState)state;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMCPUThermalProvider_h */

Sources/Telemetry/Thermal/MMCPUThermalProvider.m

@@ -0,0 +1,151 @@
+#import "MMCPUThermalProvider.h"
+#import <sys/sysctl.h>
+
+@interface MMCPUThermalProvider () {
+    MMAppleSMCClient *_smcClient;
+    NSMutableArray<NSString *> *_discoveredCoreKeys;
+    NSString *_packageKey;
+    BOOL _probed;
+}
+@end
+
+@implementation MMCPUThermalProvider
+
+- (instancetype)init {
+    return [self initWithSMCClient:[MMAppleSMCClient sharedClient]];
+}
+
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client {
+    self = [super init];
+    if (self) {
+        _smcClient = client;
+        _discoveredCoreKeys = [NSMutableArray array];
+        [self probeSensors];
+    }
+    return self;
+}
+
+- (void)probeSensors {
+    if (!_smcClient.isAvailable) return;
+    
+    // Probe package temperature key
+    NSArray<NSString *> *packageCandidates = @[@"TC0P", @"TC0D", @"TC0H", @"TCXC"];
+    for (NSString *candidate in packageCandidates) {
+        NSNumber *val = [_smcClient readNumericValueForKey:candidate error:nil];
+        if (val && [val doubleValue] > 0.0 && [val doubleValue] < 125.0) {
+            _packageKey = candidate;
+            break;
+        }
+    }
+    
+    // Probe core keys (TC0C, TC1C, etc.)
+    int coreCount = 1;
+    size_t size = sizeof(coreCount);
+    sysctlbyname("hw.physicalcpu", &coreCount, &size, NULL, 0);
+    if (coreCount <= 0) coreCount = 4;
+    
+    for (int i = 0; i < coreCount && i < 32; i++) {
+        NSString *key = [NSString stringWithFormat:@"TC%dC", i];
+        NSNumber *val = [_smcClient readNumericValueForKey:key error:nil];
+        if (val && [val doubleValue] > 0.0 && [val doubleValue] < 125.0) {
+            [_discoveredCoreKeys addObject:key];
+        }
+    }
+    
+    _probed = YES;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainThermal;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.thermal.cpu";
+}
+
+- (BOOL)isAvailable {
+    return _smcClient.isAvailable;
+}
+
+- (MMAppleSMCClient *)smcClient {
+    return _smcClient;
+}
+
+- (NSArray<NSString *> *)discoveredCoreKeys {
+    return [_discoveredCoreKeys copy];
+}
+
+- (NSString *)packageKey {
+    return _packageKey;
+}
+
++ (NSDictionary<NSString *, id> *)calculateThermalMetricsWithPackageTemp:(nullable NSNumber *)pkgTemp
+                                                               coreTemps:(NSDictionary<NSString *, NSNumber *> *)coreDict
+                                                            thermalState:(NSProcessInfoThermalState)state {
+    double peak = pkgTemp ? [pkgTemp doubleValue] : 0.0;
+    double sum = 0.0;
+    int count = 0;
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *coresList = [NSMutableArray arrayWithCapacity:coreDict.count];
+    NSArray<NSString *> *sortedKeys = [coreDict.allKeys sortedArrayUsingSelector:@selector(compare:)];
+    
+    for (NSUInteger idx = 0; idx < sortedKeys.count; idx++) {
+        NSString *k = sortedKeys[idx];
+        double temp = [coreDict[k] doubleValue];
+        if (temp > peak) peak = temp;
+        sum += temp;
+        count++;
+        
+        [coresList addObject:@{
+            @"coreIndex": @(idx),
+            @"key": k,
+            @"temperature": @(temp)
+        }];
+    }
+    
+    double avg = (count > 0) ? (sum / count) : (pkgTemp ? [pkgTemp doubleValue] : 0.0);
+    
+    NSString *stateStr = @"Nominal";
+    switch (state) {
+        case NSProcessInfoThermalStateNominal: stateStr = @"Nominal"; break;
+        case NSProcessInfoThermalStateFair: stateStr = @"Fair"; break;
+        case NSProcessInfoThermalStateSerious: stateStr = @"Serious"; break;
+        case NSProcessInfoThermalStateCritical: stateStr = @"Critical"; break;
+    }
+    
+    return @{
+        @"packageTemperature": pkgTemp ?: @(0.0),
+        @"averageCoreTemperature": @(avg),
+        @"peakCoreTemperature": @(peak),
+        @"coreTemperatures": coresList,
+        @"thermalPressureState": stateStr,
+        @"isThrottling": @(state >= NSProcessInfoThermalStateSerious)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    if (!_probed && _smcClient.isAvailable) {
+        [self probeSensors];
+    }
+    
+    NSNumber *pkgTemp = nil;
+    if (_packageKey) {
+        pkgTemp = [_smcClient readNumericValueForKey:_packageKey error:nil];
+    }
+    
+    NSMutableDictionary<NSString *, NSNumber *> *coreTemps = [NSMutableDictionary dictionary];
+    for (NSString *coreKey in _discoveredCoreKeys) {
+        NSNumber *t = [_smcClient readNumericValueForKey:coreKey error:nil];
+        if (t) {
+            coreTemps[coreKey] = t;
+        }
+    }
+    
+    NSProcessInfoThermalState thermalState = [NSProcessInfo processInfo].thermalState;
+    
+    return [MMCPUThermalProvider calculateThermalMetricsWithPackageTemp:pkgTemp
+                                                              coreTemps:coreTemps
+                                                           thermalState:thermalState];
+}
+
+@end

Sources/Telemetry/Thermal/MMComponentThermalProvider.h

@@ -0,0 +1,42 @@
+#ifndef MMComponentThermalProvider_h
+#define MMComponentThermalProvider_h
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+#import "MMAppleSMCClient.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * MMComponentThermalProvider
+ * Samples motherboard, PCH chipset, heatsink, memory, and enclosure ambient temperatures
+ * via AppleSMC.
+ */
+@interface MMComponentThermalProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, strong, readonly) MMAppleSMCClient *smcClient;
+@property (nonatomic, readonly) NSArray<NSString *> *discoveredKeys;
+
+- (instancetype)init;
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client;
+
+/**
+ * Categorize SMC temperature key into component domain (e.g., PCH / Chipset, Heatsink, Memory, etc.)
+ */
++ (NSString *)categoryForKey:(NSString *)key;
+
+/**
+ * Human-readable friendly name for known component SMC keys.
+ */
++ (NSString *)humanReadableNameForKey:(NSString *)key;
+
+/**
+ * Static calculator method for deterministic unit testing.
+ */
++ (NSDictionary<NSString *, id> *)calculateComponentMetricsFromDictionary:(NSDictionary<NSString *, NSNumber *> *)readings;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* MMComponentThermalProvider_h */

Sources/Telemetry/Thermal/MMComponentThermalProvider.m

@@ -0,0 +1,174 @@
+#import "MMComponentThermalProvider.h"
+
+@interface MMComponentThermalProvider () {
+    MMAppleSMCClient *_smcClient;
+    NSMutableArray<NSString *> *_discoveredKeys;
+    BOOL _probed;
+}
+@end
+
+@implementation MMComponentThermalProvider
+
+- (instancetype)init {
+    return [self initWithSMCClient:[MMAppleSMCClient sharedClient]];
+}
+
+- (instancetype)initWithSMCClient:(MMAppleSMCClient *)client {
+    self = [super init];
+    if (self) {
+        _smcClient = client;
+        _discoveredKeys = [NSMutableArray array];
+        [self probeSensors];
+    }
+    return self;
+}
+
+- (void)probeSensors {
+    if (!_smcClient.isAvailable) return;
+    
+    NSArray<NSString *> *candidates = @[
+        @"TPCD", @"TP0P", @"TP0D",
+        @"Th0H", @"Th1H", @"Th2H", @"Th3H",
+        @"TM0P", @"TM1P", @"TM2P", @"TM3P", @"TM0S", @"TM1S",
+        @"Tp0P", @"Tp1P", @"Tp2P", @"Tp0C",
+        @"TA0P", @"TA1P", @"TA0S", @"TA1S",
+        @"TTLD", @"TT1D", @"TB0T", @"TB1T"
+    ];
+    
+    [_discoveredKeys removeAllObjects];
+    for (NSString *key in candidates) {
+        NSNumber *val = [_smcClient readNumericValueForKey:key error:nil];
+        if (val && [val doubleValue] > 0.0 && [val doubleValue] < 125.0) {
+            [_discoveredKeys addObject:key];
+        }
+    }
+    
+    _probed = YES;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainThermal;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.thermal.components";
+}
+
+- (BOOL)isAvailable {
+    return _smcClient.isAvailable;
+}
+
+- (MMAppleSMCClient *)smcClient {
+    return _smcClient;
+}
+
+- (NSArray<NSString *> *)discoveredKeys {
+    return [_discoveredKeys copy];
+}
+
++ (NSString *)categoryForKey:(NSString *)key {
+    if ([key hasPrefix:@"TP"]) return @"PCH / Chipset";
+    if ([key hasPrefix:@"Th"]) return @"Heatsink";
+    if ([key hasPrefix:@"TM"]) return @"Memory";
+    if ([key hasPrefix:@"Tp"]) return @"Power Supply";
+    if ([key hasPrefix:@"TA"]) return @"Ambient / Enclosure";
+    if ([key hasPrefix:@"TT"] || [key hasPrefix:@"TB"] || [key hasPrefix:@"TI"]) return @"Thunderbolt / IO";
+    return @"Other";
+}
+
++ (NSString *)humanReadableNameForKey:(NSString *)key {
+    static NSDictionary<NSString *, NSString *> *names = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        names = @{
+            @"TPCD": @"Platform Controller Hub (Die)",
+            @"TP0P": @"Platform Controller Hub (Proximity)",
+            @"TP0D": @"Platform Controller Hub (Die Alternate)",
+            @"Th0H": @"Main Heatsink A",
+            @"Th1H": @"Main Heatsink B",
+            @"Th2H": @"Main Heatsink C",
+            @"Th3H": @"Main Heatsink D",
+            @"TM0P": @"Memory Bank 0 Proximity",
+            @"TM1P": @"Memory Bank 1 Proximity",
+            @"TM2P": @"Memory Bank 2 Proximity",
+            @"TM3P": @"Memory Bank 3 Proximity",
+            @"TM0S": @"Memory Module 0",
+            @"TM1S": @"Memory Module 1",
+            @"Tp0P": @"Power Supply Primary",
+            @"Tp1P": @"Power Supply Secondary",
+            @"Tp2P": @"Power Supply Tertiary",
+            @"Tp0C": @"Power Supply Core",
+            @"TA0P": @"Ambient Air Intake",
+            @"TA1P": @"Ambient Air Exhaust",
+            @"TA0S": @"Ambient Air Enclosure",
+            @"TA1S": @"Ambient Air Secondary",
+            @"TTLD": @"Thunderbolt Controller Die",
+            @"TT1D": @"Thunderbolt Controller Secondary",
+            @"TB0T": @"Thunderbolt Port 0",
+            @"TB1T": @"Thunderbolt Port 1"
+        };
+    });
+    
+    NSString *match = names[key];
+    return match ?: key;
+}
+
++ (NSDictionary<NSString *, id> *)calculateComponentMetricsFromDictionary:(NSDictionary<NSString *, NSNumber *> *)readings {
+    NSMutableArray<NSDictionary<NSString *, id> *> *components = [NSMutableArray arrayWithCapacity:readings.count];
+    NSMutableDictionary<NSString *, NSMutableArray<NSDictionary<NSString *, id> *> *> *categorized = [NSMutableDictionary dictionary];
+    
+    NSArray<NSString *> *sortedKeys = [readings.allKeys sortedArrayUsingSelector:@selector(compare:)];
+    double peak = 0.0;
+    double sum = 0.0;
+    
+    for (NSString *k in sortedKeys) {
+        double temp = [readings[k] doubleValue];
+        if (temp > peak) peak = temp;
+        sum += temp;
+        
+        NSString *cat = [self categoryForKey:k];
+        NSString *name = [self humanReadableNameForKey:k];
+        
+        NSDictionary<NSString *, id> *entry = @{
+            @"key": k,
+            @"name": name,
+            @"category": cat,
+            @"temperature": @(temp)
+        };
+        
+        [components addObject:entry];
+        
+        if (!categorized[cat]) {
+            categorized[cat] = [NSMutableArray array];
+        }
+        [categorized[cat] addObject:entry];
+    }
+    
+    double avg = readings.count > 0 ? (sum / (double)readings.count) : 0.0;
+    
+    return @{
+        @"components": components,
+        @"categorized": categorized,
+        @"sensorCount": @(readings.count),
+        @"peakTemperature": @(peak),
+        @"averageTemperature": @(avg)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    if (!_probed && _smcClient.isAvailable) {
+        [self probeSensors];
+    }
+    
+    NSMutableDictionary<NSString *, NSNumber *> *readings = [NSMutableDictionary dictionary];
+    for (NSString *key in _discoveredKeys) {
+        NSNumber *temp = [_smcClient readNumericValueForKey:key error:nil];
+        if (temp) {
+            readings[key] = temp;
+        }
+    }
+    
+    return [MMComponentThermalProvider calculateComponentMetricsFromDictionary:readings];
+}
+
+@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/MMCPULoadTests.swift

@@ -0,0 +1,65 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMCPULoadTests: XCTestCase {
+    
+    func testTickDeltaCalculation() {
+        var prevTicks = [processor_cpu_load_info_data_t]()
+        var currTicks = [processor_cpu_load_info_data_t]()
+        
+        // Setup mock Core 0: 20% user, 10% system, 70% idle
+        var core0Prev = processor_cpu_load_info_data_t()
+        core0Prev.cpu_ticks.0 = 100 // USER
+        core0Prev.cpu_ticks.1 = 50  // SYSTEM
+        core0Prev.cpu_ticks.2 = 850 // IDLE
+        core0Prev.cpu_ticks.3 = 0   // NICE
+        prevTicks.append(core0Prev)
+        
+        var core0Curr = processor_cpu_load_info_data_t()
+        core0Curr.cpu_ticks.0 = 300 // USER (+200)
+        core0Curr.cpu_ticks.1 = 150 // SYSTEM (+100)
+        core0Curr.cpu_ticks.2 = 1550 // IDLE (+700)
+        core0Curr.cpu_ticks.3 = 0   // NICE (+0)
+        currTicks.append(core0Curr)
+        
+        prevTicks.withUnsafeBufferPointer { prevBuf in
+            currTicks.withUnsafeBufferPointer { currBuf in
+                let metrics = MMCPULoadProvider.calculateLoad(
+                    fromPreviousTicks: prevBuf.baseAddress,
+                    currentTicks: currBuf.baseAddress!,
+                    coreCount: 1
+                )
+                
+                let totalPct = metrics["totalPercent"] as? Double ?? 0
+                let userPct = metrics["userPercent"] as? Double ?? 0
+                let systemPct = metrics["systemPercent"] as? Double ?? 0
+                let idlePct = metrics["idlePercent"] as? Double ?? 0
+                
+                // Total delta = 200 + 100 + 700 = 1000
+                // User = 20%, System = 10%, Idle = 70%, Total Active = 30%
+                XCTAssertEqual(totalPct, 30.0, accuracy: 0.1)
+                XCTAssertEqual(userPct, 20.0, accuracy: 0.1)
+                XCTAssertEqual(systemPct, 10.0, accuracy: 0.1)
+                XCTAssertEqual(idlePct, 70.0, accuracy: 0.1)
+            }
+        }
+    }
+    
+    func testLiveCPULoadProvider() throws {
+        let provider = MMCPULoadProvider()
+        XCTAssertTrue(provider.isAvailable)
+        XCTAssertEqual(provider.domain, .cpu)
+        XCTAssertGreaterThan(provider.coreCount, 0)
+        
+        // Initial sample establishes baseline
+        let sample1 = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample1)
+        
+        // Second sample produces live deltas
+        usleep(100_000) // 100ms
+        let sample2 = try provider.sampleTelemetry()
+        let cores = sample2["cores"] as? [[String: Any]]
+        XCTAssertNotNil(cores)
+        XCTAssertEqual(cores?.count, Int(provider.coreCount))
+    }
+}

Tests/MMCPUThermalTests.swift

@@ -0,0 +1,54 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMCPUThermalTests: XCTestCase {
+    
+    func testThermalMetricsCalculation() {
+        let pkgTemp = NSNumber(value: 55.0)
+        let coreDict: [String: NSNumber] = [
+            "TC0C": NSNumber(value: 52.0),
+            "TC1C": NSNumber(value: 56.0),
+            "TC2C": NSNumber(value: 54.0),
+            "TC3C": NSNumber(value: 58.0)
+        ]
+        
+        let metrics = MMCPUThermalProvider.calculateThermalMetrics(
+            withPackageTemp: pkgTemp,
+            coreTemps: coreDict,
+            thermalState: .nominal
+        )
+        
+        let peak = metrics["peakCoreTemperature"] as? Double ?? 0
+        let avg = metrics["averageCoreTemperature"] as? Double ?? 0
+        let state = metrics["thermalPressureState"] as? String ?? ""
+        let isThrottling = metrics["isThrottling"] as? Bool ?? true
+        
+        XCTAssertEqual(peak, 58.0, accuracy: 0.1)
+        XCTAssertEqual(avg, 55.0, accuracy: 0.1)
+        XCTAssertEqual(state, "Nominal")
+        XCTAssertFalse(isThrottling)
+    }
+    
+    func testThermalThrottlingDetection() {
+        let metrics = MMCPUThermalProvider.calculateThermalMetrics(
+            withPackageTemp: NSNumber(value: 99.0),
+            coreTemps: [:],
+            thermalState: .serious
+        )
+        
+        let isThrottling = metrics["isThrottling"] as? Bool ?? false
+        let state = metrics["thermalPressureState"] as? String ?? ""
+        
+        XCTAssertTrue(isThrottling)
+        XCTAssertEqual(state, "Serious")
+    }
+    
+    func testLiveCPUThermalProvider() throws {
+        let provider = MMCPUThermalProvider()
+        XCTAssertEqual(provider.domain, .thermal)
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["thermalPressureState"])
+    }
+}

Tests/MMComponentThermalTests.swift

@@ -0,0 +1,80 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMComponentThermalTests: XCTestCase {
+    
+    func testCategoryClassification() {
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TPCD"), "PCH / Chipset")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TP0P"), "PCH / Chipset")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "Th0H"), "Heatsink")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "Th1H"), "Heatsink")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TM0P"), "Memory")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TM1S"), "Memory")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "Tp0P"), "Power Supply")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TA0P"), "Ambient / Enclosure")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TTLD"), "Thunderbolt / IO")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "TB0T"), "Thunderbolt / IO")
+        XCTAssertEqual(MMComponentThermalProvider.category(forKey: "ZZ99"), "Other")
+    }
+    
+    func testHumanReadableNames() {
+        XCTAssertEqual(MMComponentThermalProvider.humanReadableName(forKey: "TPCD"), "Platform Controller Hub (Die)")
+        XCTAssertEqual(MMComponentThermalProvider.humanReadableName(forKey: "Th0H"), "Main Heatsink A")
+        XCTAssertEqual(MMComponentThermalProvider.humanReadableName(forKey: "TA0P"), "Ambient Air Intake")
+        XCTAssertEqual(MMComponentThermalProvider.humanReadableName(forKey: "CUSTOM"), "CUSTOM")
+    }
+    
+    func testComponentMetricsCalculation() {
+        let readings: [String: NSNumber] = [
+            "TPCD": NSNumber(value: 65.5),
+            "Th0H": NSNumber(value: 48.0),
+            "TM0P": NSNumber(value: 42.0),
+            "TA0P": NSNumber(value: 28.5)
+        ]
+        
+        let metrics = MMComponentThermalProvider.calculateComponentMetrics(from: readings)
+        
+        let peak = metrics["peakTemperature"] as? Double ?? 0
+        let avg = metrics["averageTemperature"] as? Double ?? 0
+        let count = metrics["sensorCount"] as? Int ?? 0
+        let components = metrics["components"] as? [[String: Any]] ?? []
+        let categorized = metrics["categorized"] as? [String: [[String: Any]]] ?? [:]
+        
+        XCTAssertEqual(peak, 65.5, accuracy: 0.1)
+        XCTAssertEqual(avg, (65.5 + 48.0 + 42.0 + 28.5) / 4.0, accuracy: 0.1)
+        XCTAssertEqual(count, 4)
+        XCTAssertEqual(components.count, 4)
+        
+        let pchList = categorized["PCH / Chipset"]
+        XCTAssertNotNil(pchList)
+        let firstPchName = pchList?.first?["name"] as? String
+        XCTAssertEqual(firstPchName, "Platform Controller Hub (Die)")
+        XCTAssertEqual(categorized["Heatsink"]?.count, 1)
+        XCTAssertEqual(categorized["Memory"]?.count, 1)
+        XCTAssertEqual(categorized["Ambient / Enclosure"]?.count, 1)
+    }
+    
+    func testEmptyReadingsCalculation() {
+        let metrics = MMComponentThermalProvider.calculateComponentMetrics(from: [:])
+        
+        let peak = metrics["peakTemperature"] as? Double ?? -1
+        let avg = metrics["averageTemperature"] as? Double ?? -1
+        let count = metrics["sensorCount"] as? Int ?? -1
+        
+        XCTAssertEqual(peak, 0.0)
+        XCTAssertEqual(avg, 0.0)
+        XCTAssertEqual(count, 0)
+    }
+    
+    func testLiveComponentThermalProvider() throws {
+        let provider = MMComponentThermalProvider()
+        XCTAssertEqual(provider.domain, .thermal)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.thermal.components")
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["sensorCount"])
+        XCTAssertNotNil(sample["components"])
+        XCTAssertNotNil(sample["categorized"])
+    }
+}

Tests/MMFanTests.swift

@@ -0,0 +1,48 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMFanTests: XCTestCase {
+    
+    func testFanUtilizationCalculation() {
+        let fanList: [[String: NSNumber]] = [
+            [
+                "currentRPM": NSNumber(value: 2000.0),
+                "minRPM": NSNumber(value: 1200.0),
+                "maxRPM": NSNumber(value: 5000.0),
+                "targetRPM": NSNumber(value: 2000.0)
+            ],
+            [
+                "currentRPM": NSNumber(value: 2500.0),
+                "minRPM": NSNumber(value: 1200.0),
+                "maxRPM": NSNumber(value: 5000.0),
+                "targetRPM": NSNumber(value: 2500.0)
+            ]
+        ]
+        
+        let metrics = MMFanTelemetryProvider.calculateFanMetrics(fromFanList: fanList)
+        
+        let count = metrics["fanCount"] as? Int ?? 0
+        let avgRPM = metrics["averageRPM"] as? Double ?? 0
+        let peakRPM = metrics["peakRPM"] as? Double ?? 0
+        let fans = metrics["fans"] as? [[String: Any]] ?? []
+        
+        XCTAssertEqual(count, 2)
+        XCTAssertEqual(avgRPM, 2250.0, accuracy: 0.1)
+        XCTAssertEqual(peakRPM, 2500.0, accuracy: 0.1)
+        XCTAssertEqual(fans.count, 2)
+        
+        let fan0 = fans[0]
+        let util0 = fan0["utilizationPercent"] as? Double ?? 0
+        // (2000 - 1200) / 3800 * 100 = 21.05%
+        XCTAssertEqual(util0, 21.05, accuracy: 0.1)
+    }
+    
+    func testLiveFanProvider() throws {
+        let provider = MMFanTelemetryProvider()
+        XCTAssertEqual(provider.domain, .fan)
+        
+        let sample = try provider.sampleTelemetry()
+        XCTAssertNotNil(sample)
+        XCTAssertNotNil(sample["fanCount"])
+    }
+}

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/MMMemoryTests.swift

@@ -0,0 +1,64 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMMemoryTests: XCTestCase {
+    
+    func testMemoryMetricCalculation() {
+        var vmInfo = vm_statistics64_data_t()
+        let pageSize: vm_size_t = 4096
+        let totalRAM: UInt64 = 16 * 1024 * 1024 * 1024 // 16 GB
+        
+        // 1GB wired (262144 pages), 2GB app (524288 pages), 1GB compressed (262144 pages)
+        vmInfo.wire_count = 262_144
+        vmInfo.internal_page_count = 524_288
+        vmInfo.purgeable_count = 0
+        vmInfo.compressor_page_count = 262_144
+        vmInfo.active_count = 524_288
+        vmInfo.inactive_count = 1_048_576 // 4GB
+        vmInfo.free_count = 2_097_152     // 8GB
+        
+        var swap = xsw_usage()
+        swap.xsu_total = 2 * 1024 * 1024 * 1024
+        swap.xsu_used = 512 * 1024 * 1024
+        swap.xsu_avail = swap.xsu_total - swap.xsu_used
+        
+        withUnsafePointer(to: vmInfo) { vmPtr in
+            withUnsafePointer(to: swap) { swapPtr in
+                let metrics = MMMemoryTelemetryProvider.calculateMemoryMetrics(
+                    withVMInfo: vmPtr,
+                    pageSize: pageSize,
+                    totalPhysicalRAM: totalRAM,
+                    swapUsage: swapPtr
+                )
+                
+                let wired = metrics["wiredBytes"] as? UInt64 ?? 0
+                let app = metrics["appMemoryBytes"] as? UInt64 ?? 0
+                let compressed = metrics["compressedBytes"] as? UInt64 ?? 0
+                let used = metrics["usedBytes"] as? UInt64 ?? 0
+                let pressureStatus = metrics["memoryPressureStatus"] as? String ?? ""
+                
+                XCTAssertEqual(wired, 1024 * 1024 * 1024)
+                XCTAssertEqual(app, 2 * 1024 * 1024 * 1024)
+                XCTAssertEqual(compressed, 1024 * 1024 * 1024)
+                XCTAssertEqual(used, 4 * 1024 * 1024 * 1024)
+                XCTAssertEqual(pressureStatus, "Normal")
+            }
+        }
+    }
+    
+    func testLiveMemoryProvider() throws {
+        let provider = MMMemoryTelemetryProvider()
+        XCTAssertTrue(provider.isAvailable)
+        XCTAssertEqual(provider.domain, .memory)
+        XCTAssertGreaterThan(provider.totalPhysicalMemoryBytes, 0)
+        
+        let sample = try provider.sampleTelemetry()
+        let total = sample["totalBytes"] as? UInt64 ?? 0
+        let used = sample["usedBytes"] as? UInt64 ?? 0
+        let free = sample["freeBytes"] as? UInt64 ?? 0
+        
+        XCTAssertGreaterThan(total, 0)
+        XCTAssertGreaterThan(used, 0)
+        XCTAssertGreaterThanOrEqual(free, 0)
+    }
+}

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/MMStorageTests.swift

@@ -0,0 +1,64 @@
+import XCTest
+@testable import MacMonitor
+
+final class MMStorageTests: XCTestCase {
+    
+    func testStatFSBufferParsing() {
+        var stat = statfs()
+        stat.f_bsize = 4096
+        stat.f_blocks = 125_000_000 // 500 GB
+        stat.f_bfree = 50_000_000   // 200 GB
+        stat.f_bavail = 45_000_000
+        stat.f_flags = UInt32(MNT_LOCAL)
+        
+        let mountPath = "/Volumes/External"
+        let devicePath = "/dev/disk2s1"
+        let fsType = "apfs"
+        
+        _ = mountPath.withCString { mntPtr in
+            strncpy(&stat.f_mntonname.0, mntPtr, Int(MNAMELEN))
+        }
+        _ = devicePath.withCString { devPtr in
+            strncpy(&stat.f_mntfromname.0, devPtr, Int(MNAMELEN))
+        }
+        _ = fsType.withCString { fsPtr in
+            strncpy(&stat.f_fstypename.0, fsPtr, Int(MFSTYPENAMELEN))
+        }
+        
+        withUnsafePointer(to: stat) { ptr in
+            let volumes = MMStorageTelemetryProvider.parseStatFSBuffer(ptr, count: 1)
+            XCTAssertEqual(volumes.count, 1)
+            
+            let vol = volumes.first!
+            XCTAssertEqual(vol["volumeName"] as? String, "External")
+            XCTAssertEqual(vol["mountPoint"] as? String, "/Volumes/External")
+            XCTAssertEqual(vol["devicePath"] as? String, "/dev/disk2s1")
+            XCTAssertEqual(vol["fsType"] as? String, "apfs")
+            
+            let total = vol["totalBytes"] as? UInt64 ?? 0
+            let free = vol["freeBytes"] as? UInt64 ?? 0
+            let used = vol["usedBytes"] as? UInt64 ?? 0
+            let pct = vol["usedPercent"] as? Double ?? 0
+            
+            XCTAssertEqual(total, 512_000_000_000)
+            XCTAssertEqual(free, 204_800_000_000)
+            XCTAssertEqual(used, 307_200_000_000)
+            XCTAssertEqual(pct, 60.0, accuracy: 0.1)
+        }
+    }
+    
+    func testLiveStorageProvider() throws {
+        let provider = MMStorageTelemetryProvider()
+        XCTAssertTrue(provider.isAvailable)
+        XCTAssertEqual(provider.domain, .storage)
+        
+        let sample = try provider.sampleTelemetry()
+        let volumes = sample["volumes"] as? [[String: Any]]
+        XCTAssertNotNil(volumes)
+        XCTAssertGreaterThan(volumes?.count ?? 0, 0)
+        
+        let firstVol = volumes?.first
+        XCTAssertNotNil(firstVol?["mountPoint"])
+        XCTAssertGreaterThan(firstVol?["totalBytes"] as? UInt64 ?? 0, 0)
+    }
+}

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)
+    }
 }