diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa9a6e735..ae274ccc3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - UI: add optional `ui.seamColor` accent to tint the Talk Mode side bubble (macOS/iOS/Android).
 - Agent runtime: accept legacy `Z_AI_API_KEY` for Z.AI provider auth (maps to `ZAI_API_KEY`).
 - Tests: add a Z.AI live test gate for smoke validation when keys are present.
+- macOS Debug: add app log verbosity and rolling file log toggle for swift-log-backed app logs.
 
 ### Fixes
 - Docs/agent tools: clarify that browser `wait` should be avoided by default and used only in exceptional cases.
diff --git a/apps/macos/Package.swift b/apps/macos/Package.swift
index 02aaf2ecd..be8946514 100644
--- a/apps/macos/Package.swift
+++ b/apps/macos/Package.swift
@@ -15,6 +15,7 @@ let package = Package(
     dependencies: [
         .package(url: "https://github.com/orchetect/MenuBarExtraAccess", exact: "1.2.2"),
         .package(url: "https://github.com/swiftlang/swift-subprocess.git", from: "0.1.0"),
+        .package(url: "https://github.com/apple/swift-log.git", from: "1.8.0"),
         .package(url: "https://github.com/sparkle-project/Sparkle", from: "2.8.1"),
         .package(path: "../shared/ClawdisKit"),
         .package(path: "../../Swabble"),
@@ -45,6 +46,7 @@ let package = Package(
                 .product(name: "SwabbleKit", package: "swabble"),
                 .product(name: "MenuBarExtraAccess", package: "MenuBarExtraAccess"),
                 .product(name: "Subprocess", package: "swift-subprocess"),
+                .product(name: "Logging", package: "swift-log"),
                 .product(name: "Sparkle", package: "Sparkle"),
                 .product(name: "PeekabooBridge", package: "PeekabooCore"),
                 .product(name: "PeekabooAutomationKit", package: "PeekabooAutomationKit"),
diff --git a/apps/macos/Sources/Clawdis/CanvasWindow.swift b/apps/macos/Sources/Clawdis/CanvasWindow.swift
index 30b0c8c41..e03ba2c42 100644
--- a/apps/macos/Sources/Clawdis/CanvasWindow.swift
+++ b/apps/macos/Sources/Clawdis/CanvasWindow.swift
@@ -1,5 +1,4 @@
 import AppKit
-import OSLog
 
 let canvasWindowLogger = Logger(subsystem: "com.steipete.clawdis", category: "Canvas")
 
diff --git a/apps/macos/Sources/Clawdis/Constants.swift b/apps/macos/Sources/Clawdis/Constants.swift
index 589091261..639d12afc 100644
--- a/apps/macos/Sources/Clawdis/Constants.swift
+++ b/apps/macos/Sources/Clawdis/Constants.swift
@@ -32,5 +32,6 @@ let modelCatalogReloadKey = "clawdis.modelCatalogReload"
 let attachExistingGatewayOnlyKey = "clawdis.gateway.attachExistingOnly"
 let heartbeatsEnabledKey = "clawdis.heartbeatsEnabled"
 let debugFileLogEnabledKey = "clawdis.debug.fileLogEnabled"
+let appLogLevelKey = "clawdis.debug.appLogLevel"
 let voiceWakeSupported: Bool = ProcessInfo.processInfo.operatingSystemVersion.majorVersion >= 26
 let cliHelperSearchPaths = ["/usr/local/bin", "/opt/homebrew/bin"]
diff --git a/apps/macos/Sources/Clawdis/ControlChannel.swift b/apps/macos/Sources/Clawdis/ControlChannel.swift
index 5312fa641..51c97a6c3 100644
--- a/apps/macos/Sources/Clawdis/ControlChannel.swift
+++ b/apps/macos/Sources/Clawdis/ControlChannel.swift
@@ -1,7 +1,6 @@
 import ClawdisProtocol
 import Foundation
 import Observation
-import OSLog
 import SwiftUI
 
 struct ControlHeartbeatEvent: Codable {
diff --git a/apps/macos/Sources/Clawdis/DebugSettings.swift b/apps/macos/Sources/Clawdis/DebugSettings.swift
index a30cf917a..037a17855 100644
--- a/apps/macos/Sources/Clawdis/DebugSettings.swift
+++ b/apps/macos/Sources/Clawdis/DebugSettings.swift
@@ -30,6 +30,7 @@ struct DebugSettings: View {
     @State private var pendingKill: DebugActions.PortListener?
     @AppStorage(attachExistingGatewayOnlyKey) private var attachExistingGatewayOnly: Bool = false
     @AppStorage(debugFileLogEnabledKey) private var diagnosticsFileLogEnabled: Bool = false
+    @AppStorage(appLogLevelKey) private var appLogLevelRaw: String = AppLogLevel.default.rawValue
 
     @State private var canvasSessionKey: String = "main"
     @State private var canvasStatus: String?
@@ -232,13 +233,23 @@ struct DebugSettings: View {
                 }
 
                 GridRow {
-                    self.gridLabel("Diagnostics")
-                    VStack(alignment: .leading, spacing: 6) {
+                    self.gridLabel("App logging")
+                    VStack(alignment: .leading, spacing: 8) {
+                        Picker("Verbosity", selection: self.$appLogLevelRaw) {
+                            ForEach(AppLogLevel.allCases) { level in
+                                Text(level.title).tag(level.rawValue)
+                            }
+                        }
+                        .pickerStyle(.menu)
+                        .labelsHidden()
+                        .help("Controls the macOS app log verbosity.")
+
                         Toggle("Write rolling diagnostics log (JSONL)", isOn: self.$diagnosticsFileLogEnabled)
                             .toggleStyle(.checkbox)
                             .help(
-                                "Writes a rotating, local-only diagnostics log under ~/Library/Logs/Clawdis/. " +
+                                "Writes a rotating, local-only log under ~/Library/Logs/Clawdis/. " +
                                     "Enable only while actively debugging.")
+
                         HStack(spacing: 8) {
                             Button("Open folder") {
                                 NSWorkspace.shared.open(DiagnosticsFileLog.logDirectoryURL())
diff --git a/apps/macos/Sources/Clawdis/DockIconManager.swift b/apps/macos/Sources/Clawdis/DockIconManager.swift
index 1e3a98f43..d0bee9543 100644
--- a/apps/macos/Sources/Clawdis/DockIconManager.swift
+++ b/apps/macos/Sources/Clawdis/DockIconManager.swift
@@ -1,5 +1,4 @@
 import AppKit
-import OSLog
 
 /// Central manager for Dock icon visibility.
 /// Shows the Dock icon while any windows are visible, regardless of user preference.
diff --git a/apps/macos/Sources/Clawdis/HealthStore.swift b/apps/macos/Sources/Clawdis/HealthStore.swift
index 262291824..721e8afd3 100644
--- a/apps/macos/Sources/Clawdis/HealthStore.swift
+++ b/apps/macos/Sources/Clawdis/HealthStore.swift
@@ -1,7 +1,6 @@
 import Foundation
 import Network
 import Observation
-import OSLog
 import SwiftUI
 
 struct HealthSnapshot: Codable, Sendable {
diff --git a/apps/macos/Sources/Clawdis/Logging/ClawdisLogging.swift b/apps/macos/Sources/Clawdis/Logging/ClawdisLogging.swift
new file mode 100644
index 000000000..b759828c1
--- /dev/null
+++ b/apps/macos/Sources/Clawdis/Logging/ClawdisLogging.swift
@@ -0,0 +1,229 @@
+@_exported import Logging
+import Foundation
+import OSLog
+
+typealias Logger = Logging.Logger
+
+enum AppLogSettings {
+    static let logLevelKey = appLogLevelKey
+
+    static func logLevel() -> Logger.Level {
+        if let raw = UserDefaults.standard.string(forKey: self.logLevelKey),
+           let level = Logger.Level(rawValue: raw)
+        {
+            return level
+        }
+        return .info
+    }
+
+    static func setLogLevel(_ level: Logger.Level) {
+        UserDefaults.standard.set(level.rawValue, forKey: self.logLevelKey)
+    }
+
+    static func fileLoggingEnabled() -> Bool {
+        UserDefaults.standard.bool(forKey: debugFileLogEnabledKey)
+    }
+}
+
+enum AppLogLevel: String, CaseIterable, Identifiable {
+    case trace
+    case debug
+    case info
+    case notice
+    case warning
+    case error
+    case critical
+
+    static let `default`: AppLogLevel = .info
+
+    var id: String { self.rawValue }
+
+    var title: String {
+        switch self {
+        case .trace: "Trace"
+        case .debug: "Debug"
+        case .info: "Info"
+        case .notice: "Notice"
+        case .warning: "Warning"
+        case .error: "Error"
+        case .critical: "Critical"
+        }
+    }
+}
+
+enum ClawdisLogging {
+    private static let labelSeparator = "::"
+
+    private static let didBootstrap: Void = {
+        LoggingSystem.bootstrap { label in
+            let (subsystem, category) = Self.parseLabel(label)
+            let osHandler = ClawdisOSLogHandler(subsystem: subsystem, category: category)
+            let fileHandler = ClawdisFileLogHandler(label: label)
+            return MultiplexLogHandler([osHandler, fileHandler])
+        }
+    }()
+
+    static func bootstrapIfNeeded() {
+        _ = Self.didBootstrap
+    }
+
+    static func makeLabel(subsystem: String, category: String) -> String {
+        "\(subsystem)\(Self.labelSeparator)\(category)"
+    }
+
+    static func parseLabel(_ label: String) -> (String, String) {
+        guard let range = label.range(of: Self.labelSeparator) else {
+            return ("com.steipete.clawdis", label)
+        }
+        let subsystem = String(label[..<range.lowerBound])
+        let category = String(label[range.upperBound...])
+        return (subsystem, category)
+    }
+}
+
+extension Logging.Logger {
+    init(subsystem: String, category: String) {
+        ClawdisLogging.bootstrapIfNeeded()
+        let label = ClawdisLogging.makeLabel(subsystem: subsystem, category: category)
+        self.init(label: label)
+    }
+}
+
+extension Logger.Message.StringInterpolation {
+    mutating func appendInterpolation<T>(_ value: T, privacy: OSLogPrivacy) {
+        self.appendInterpolation(String(describing: value))
+    }
+}
+
+struct ClawdisOSLogHandler: LogHandler {
+    private let osLogger: OSLog.Logger
+    var metadata: Logger.Metadata = [:]
+
+    var logLevel: Logger.Level {
+        get { AppLogSettings.logLevel() }
+        set { AppLogSettings.setLogLevel(newValue) }
+    }
+
+    init(subsystem: String, category: String) {
+        self.osLogger = OSLog.Logger(subsystem: subsystem, category: category)
+    }
+
+    subscript(metadataKey key: String) -> Logger.Metadata.Value? {
+        get { self.metadata[key] }
+        set { self.metadata[key] = newValue }
+    }
+
+    func log(
+        level: Logger.Level,
+        message: Logger.Message,
+        metadata: Logger.Metadata?,
+        source: String,
+        file: String,
+        function: String,
+        line: UInt)
+    {
+        let merged = Self.mergeMetadata(self.metadata, metadata)
+        let rendered = Self.renderMessage(message, metadata: merged)
+        self.osLogger.log(level: Self.osLogType(for: level), "\(rendered, privacy: .public)")
+    }
+
+    private static func osLogType(for level: Logger.Level) -> OSLogType {
+        switch level {
+        case .trace, .debug:
+            return .debug
+        case .info, .notice:
+            return .info
+        case .warning:
+            return .default
+        case .error:
+            return .error
+        case .critical:
+            return .fault
+        }
+    }
+
+    private static func mergeMetadata(
+        _ base: Logger.Metadata,
+        _ extra: Logger.Metadata?) -> Logger.Metadata
+    {
+        guard let extra else { return base }
+        return base.merging(extra, uniquingKeysWith: { _, new in new })
+    }
+
+    private static func renderMessage(_ message: Logger.Message, metadata: Logger.Metadata) -> String {
+        guard !metadata.isEmpty else { return message.description }
+        let meta = metadata
+            .sorted(by: { $0.key < $1.key })
+            .map { "\($0.key)=\(stringify($0.value))" }
+            .joined(separator: " ")
+        return "\(message.description) [\(meta)]"
+    }
+
+    private static func stringify(_ value: Logger.Metadata.Value) -> String {
+        switch value {
+        case let .string(text):
+            text
+        case let .stringConvertible(value):
+            String(describing: value)
+        case let .array(values):
+            "[" + values.map { stringify($0) }.joined(separator: ",") + "]"
+        case let .dictionary(entries):
+            "{" + entries.map { "\($0.key)=\(stringify($0.value))" }.joined(separator: ",") + "}"
+        }
+    }
+}
+
+struct ClawdisFileLogHandler: LogHandler {
+    let label: String
+    var metadata: Logger.Metadata = [:]
+
+    var logLevel: Logger.Level {
+        get { AppLogSettings.logLevel() }
+        set { AppLogSettings.setLogLevel(newValue) }
+    }
+
+    subscript(metadataKey key: String) -> Logger.Metadata.Value? {
+        get { self.metadata[key] }
+        set { self.metadata[key] = newValue }
+    }
+
+    func log(
+        level: Logger.Level,
+        message: Logger.Message,
+        metadata: Logger.Metadata?,
+        source: String,
+        file: String,
+        function: String,
+        line: UInt)
+    {
+        guard AppLogSettings.fileLoggingEnabled() else { return }
+        let (subsystem, category) = ClawdisLogging.parseLabel(self.label)
+        var fields: [String: String] = [
+            "subsystem": subsystem,
+            "category": category,
+            "level": level.rawValue,
+            "source": source,
+            "file": file,
+            "function": function,
+            "line": "\(line)",
+        ]
+        let merged = self.metadata.merging(metadata ?? [:], uniquingKeysWith: { _, new in new })
+        for (key, value) in merged {
+            fields["meta.\(key)"] = Self.stringify(value)
+        }
+        DiagnosticsFileLog.shared.log(category: category, event: message.description, fields: fields)
+    }
+
+    private static func stringify(_ value: Logger.Metadata.Value) -> String {
+        switch value {
+        case let .string(text):
+            text
+        case let .stringConvertible(value):
+            String(describing: value)
+        case let .array(values):
+            "[" + values.map { stringify($0) }.joined(separator: ",") + "]"
+        case let .dictionary(entries):
+            "{" + entries.map { "\($0.key)=\(stringify($0.value))" }.joined(separator: ",") + "}"
+        }
+    }
+}
diff --git a/apps/macos/Sources/Clawdis/MenuBar.swift b/apps/macos/Sources/Clawdis/MenuBar.swift
index c998cafea..770982311 100644
--- a/apps/macos/Sources/Clawdis/MenuBar.swift
+++ b/apps/macos/Sources/Clawdis/MenuBar.swift
@@ -3,7 +3,6 @@ import Darwin
 import Foundation
 import MenuBarExtraAccess
 import Observation
-import OSLog
 import Security
 import SwiftUI
 
@@ -30,6 +29,7 @@ struct ClawdisApp: App {
     }
 
     init() {
+        ClawdisLogging.bootstrapIfNeeded()
         _state = State(initialValue: AppStateStore.shared)
     }
 
diff --git a/apps/macos/Sources/Clawdis/MenuContentView.swift b/apps/macos/Sources/Clawdis/MenuContentView.swift
index 7cb1d420b..d18aa6dbf 100644
--- a/apps/macos/Sources/Clawdis/MenuContentView.swift
+++ b/apps/macos/Sources/Clawdis/MenuContentView.swift
@@ -20,6 +20,8 @@ struct MenuContent: View {
     @State private var loadingMics = false
     @State private var browserControlEnabled = true
     @AppStorage(cameraEnabledKey) private var cameraEnabled: Bool = false
+    @AppStorage(appLogLevelKey) private var appLogLevelRaw: String = AppLogLevel.default.rawValue
+    @AppStorage(debugFileLogEnabledKey) private var appFileLoggingEnabled: Bool = false
 
     init(state: AppState, updater: UpdaterProviding?) {
         self._state = Bindable(wrappedValue: state)
@@ -182,6 +184,20 @@ struct MenuContent: View {
                             : "Verbose Logging (Main): Off",
                         systemImage: "text.alignleft")
                 }
+                Menu("App Logging") {
+                    Picker("Verbosity", selection: self.$appLogLevelRaw) {
+                        ForEach(AppLogLevel.allCases) { level in
+                            Text(level.title).tag(level.rawValue)
+                        }
+                    }
+                    Toggle(isOn: self.$appFileLoggingEnabled) {
+                        Label(
+                            self.appFileLoggingEnabled
+                                ? "File Logging: On"
+                                : "File Logging: Off",
+                            systemImage: "doc.text.magnifyingglass")
+                    }
+                }
                 Button {
                     DebugActions.openSessionStore()
                 } label: {
diff --git a/apps/macos/Sources/Clawdis/PermissionManager.swift b/apps/macos/Sources/Clawdis/PermissionManager.swift
index d7d1ab4e0..e6de4e58f 100644
--- a/apps/macos/Sources/Clawdis/PermissionManager.swift
+++ b/apps/macos/Sources/Clawdis/PermissionManager.swift
@@ -5,7 +5,6 @@ import ClawdisIPC
 import CoreGraphics
 import Foundation
 import Observation
-import OSLog
 import Speech
 import UserNotifications
 
diff --git a/apps/macos/Sources/Clawdis/TalkModeController.swift b/apps/macos/Sources/Clawdis/TalkModeController.swift
index 85e3405ec..c87dd92da 100644
--- a/apps/macos/Sources/Clawdis/TalkModeController.swift
+++ b/apps/macos/Sources/Clawdis/TalkModeController.swift
@@ -1,5 +1,4 @@
 import Observation
-import OSLog
 
 @MainActor
 @Observable
diff --git a/apps/macos/Sources/Clawdis/VoiceSessionCoordinator.swift b/apps/macos/Sources/Clawdis/VoiceSessionCoordinator.swift
index 070a066d4..5cd2f79f5 100644
--- a/apps/macos/Sources/Clawdis/VoiceSessionCoordinator.swift
+++ b/apps/macos/Sources/Clawdis/VoiceSessionCoordinator.swift
@@ -1,7 +1,6 @@
 import AppKit
 import Foundation
 import Observation
-import OSLog
 
 @MainActor
 @Observable
diff --git a/apps/macos/Sources/Clawdis/VoiceWakeOverlay.swift b/apps/macos/Sources/Clawdis/VoiceWakeOverlay.swift
index f77ec4031..f2b818898 100644
--- a/apps/macos/Sources/Clawdis/VoiceWakeOverlay.swift
+++ b/apps/macos/Sources/Clawdis/VoiceWakeOverlay.swift
@@ -1,6 +1,5 @@
 import AppKit
 import Observation
-import OSLog
 import SwiftUI
 
 /// Lightweight, borderless panel that shows the current voice wake transcript near the menu bar.
diff --git a/apps/macos/Sources/Clawdis/VoiceWakeTester.swift b/apps/macos/Sources/Clawdis/VoiceWakeTester.swift
index 3c6a81283..5d6d77852 100644
--- a/apps/macos/Sources/Clawdis/VoiceWakeTester.swift
+++ b/apps/macos/Sources/Clawdis/VoiceWakeTester.swift
@@ -1,6 +1,5 @@
 import AVFoundation
 import Foundation
-import OSLog
 import Speech
 import SwabbleKit
 
diff --git a/docs/mac/logging.md b/docs/mac/logging.md
index e0a5926b0..368da20e6 100644
--- a/docs/mac/logging.md
+++ b/docs/mac/logging.md
@@ -7,11 +7,12 @@ read_when:
 # Logging (macOS)
 
 ## Rolling diagnostics file log (Debug pane)
-Clawdis can write a local, rotating diagnostics log to disk (useful when macOS unified logging is impractical during iterative repros).
+Clawdis routes macOS app logs through swift-log (unified logging by default) and can write a local, rotating file log to disk when you need a durable capture.
 
-- Enable: **Debug pane → Diagnostics log → “Write rolling diagnostics log (JSONL)”**
+- Verbosity: **Debug pane → Logs → App logging → Verbosity**
+- Enable: **Debug pane → Logs → App logging → “Write rolling diagnostics log (JSONL)”**
 - Location: `~/Library/Logs/Clawdis/diagnostics.jsonl` (rotates automatically; old files are suffixed with `.1`, `.2`, …)
-- Clear: **Debug pane → Diagnostics log → “Clear”**
+- Clear: **Debug pane → Logs → App logging → “Clear”**
 
 Notes:
 - This is **off by default**. Enable only while actively debugging.