20 changed files with 981 additions and 11 deletions
@@ -0,0 +1,89 @@
+using MeetingAssistant.LaunchProfiles;
+using MeetingAssistant.MacOs;
+using MeetingAssistant.Workflow;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace MeetingAssistant.Tests;
+
+public sealed class MacOsDesktopControlManifestTests
+{
+    [Fact]
+    public void MacOsApplicationRegistersARealInteractiveAgentWindow()
+    {
+        if (!OperatingSystem.IsMacOS())
+        {
+            return;
+        }
+
+        using var factory = new WebApplicationFactory<Program>();
+
+        var service = factory.Services.GetRequiredService<IWorkflowRulesEditorWindowService>();
+
+        Assert.IsType<MacOsWorkflowRulesEditorWindowService>(service);
+    }
+
+    [Fact]
+    public void ManifestPreservesConfiguredWindowsEquivalentShortcutsAndControlEndpoints()
+    {
+        var profiles = new[]
+        {
+            Profile("default", "Ctrl+Alt+M", "Ctrl+Alt+Z", "Ctrl+Alt+S"),
+            Profile("english", "Ctrl+Alt+L", "", "")
+        };
+
+        var hotkeys = new[]
+        {
+            new LaunchProfileHotkey("default", "Ctrl+Alt+M", LaunchProfileHotkeyAction.ToggleRecording),
+            new LaunchProfileHotkey("default", "Ctrl+Alt+Z", LaunchProfileHotkeyAction.AbortRecording),
+            new LaunchProfileHotkey("default", "Ctrl+Alt+S", LaunchProfileHotkeyAction.CaptureScreenshot),
+            new LaunchProfileHotkey("english", "Ctrl+Alt+L", LaunchProfileHotkeyAction.ToggleRecording)
+        };
+
+        var manifest = MacOsDesktopControlManifest.Create(
+            "http://127.0.0.1:5090",
+            profiles,
+            hotkeys);
+
+        Assert.Collection(
+            manifest.Hotkeys,
+            hotkey =>
+            {
+                Assert.Equal("Ctrl+Alt+M", hotkey.Shortcut);
+                Assert.Equal("/profiles/default/recording/toggle", hotkey.Endpoint);
+            },
+            hotkey =>
+            {
+                Assert.Equal("Ctrl+Alt+Z", hotkey.Shortcut);
+                Assert.Equal("/profiles/default/recording/abort", hotkey.Endpoint);
+            },
+            hotkey =>
+            {
+                Assert.Equal("Ctrl+Alt+S", hotkey.Shortcut);
+                Assert.Equal("/profiles/default/meetings/screenshot/capture", hotkey.Endpoint);
+            },
+            hotkey =>
+            {
+                Assert.Equal("Ctrl+Alt+L", hotkey.Shortcut);
+                Assert.Equal("/profiles/english/recording/toggle", hotkey.Endpoint);
+            });
+        Assert.Equal("http://127.0.0.1:5090/recording/status", manifest.StatusUrl);
+        Assert.Equal("http://127.0.0.1:5090/diagnostics/settings-and-logs", manifest.OpenAgentUrl);
+    }
+
+    private static LaunchProfile Profile(string name, string toggle, string abort, string screenshot)
+    {
+        return new LaunchProfile(name, new MeetingAssistantOptions
+        {
+            Hotkey = new HotkeyOptions
+            {
+                Toggle = toggle,
+                Abort = abort
+            },
+            Screenshots = new ScreenshotOptions
+            {
+                Hotkey = screenshot
+            }
+        });
+    }
+}
@@ -0,0 +1,47 @@
+using MeetingAssistant.LaunchProfiles;
+
+namespace MeetingAssistant.MacOs;
+
+public sealed record MacOsDesktopControlManifest(
+    string BaseUrl,
+    string StatusUrl,
+    string OpenAgentUrl,
+    IReadOnlyList<MacOsDesktopProfile> Profiles,
+    IReadOnlyList<MacOsDesktopHotkey> Hotkeys)
+{
+    public static MacOsDesktopControlManifest Create(
+        string baseUrl,
+        IReadOnlyList<LaunchProfile> profiles,
+        IReadOnlyList<LaunchProfileHotkey> hotkeys)
+    {
+        var normalizedBaseUrl = baseUrl.TrimEnd('/');
+        return new MacOsDesktopControlManifest(
+            normalizedBaseUrl,
+            $"{normalizedBaseUrl}/recording/status",
+            $"{normalizedBaseUrl}/diagnostics/settings-and-logs",
+            profiles
+                .Select(profile => new MacOsDesktopProfile(
+                    profile.Name,
+                    profile.Options.Hotkey.Toggle))
+                .ToArray(),
+            hotkeys.Select(CreateHotkey).ToArray());
+    }
+
+    private static MacOsDesktopHotkey CreateHotkey(LaunchProfileHotkey hotkey)
+    {
+        var endpoint = hotkey.Action switch
+        {
+            LaunchProfileHotkeyAction.ToggleRecording => "recording/toggle",
+            LaunchProfileHotkeyAction.AbortRecording => "recording/abort",
+            LaunchProfileHotkeyAction.CaptureScreenshot => "meetings/screenshot/capture",
+            _ => throw new ArgumentOutOfRangeException(nameof(hotkey))
+        };
+        return new MacOsDesktopHotkey(
+            hotkey.Hotkey,
+            $"/profiles/{Uri.EscapeDataString(hotkey.ProfileName)}/{endpoint}");
+    }
+}
+
+public sealed record MacOsDesktopProfile(string Name, string ToggleShortcut);
+
+public sealed record MacOsDesktopHotkey(string Shortcut, string Endpoint);
@@ -0,0 +1,107 @@
+using System.Diagnostics;
+using System.Text.Json;
+using MeetingAssistant.LaunchProfiles;
+using Microsoft.Extensions.Options;
+
+namespace MeetingAssistant.MacOs;
+
+public sealed class MacOsDesktopControlService : IHostedService, IDisposable
+{
+    private readonly ILaunchProfileOptionsProvider launchProfiles;
+    private readonly IOptions<MeetingAssistantOptions> options;
+    private readonly IHostApplicationLifetime applicationLifetime;
+    private readonly ILogger<MacOsDesktopControlService> logger;
+    private Process? helper;
+    private string? manifestPath;
+
+    public MacOsDesktopControlService(
+        ILaunchProfileOptionsProvider launchProfiles,
+        IOptions<MeetingAssistantOptions> options,
+        IHostApplicationLifetime applicationLifetime,
+        ILogger<MacOsDesktopControlService> logger)
+    {
+        this.launchProfiles = launchProfiles;
+        this.options = options;
+        this.applicationLifetime = applicationLifetime;
+        this.logger = logger;
+    }
+
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        if (!OperatingSystem.IsMacOS())
+        {
+            return Task.CompletedTask;
+        }
+
+        var helperPath = Path.Combine(AppContext.BaseDirectory, "Native", "macos-desktop-controls");
+        if (!File.Exists(helperPath))
+        {
+            logger.LogWarning("macOS desktop controls helper was not found at {HelperPath}", helperPath);
+            return Task.CompletedTask;
+        }
+
+        var manifest = MacOsDesktopControlManifest.Create(
+            options.Value.Api.PublicBaseUrl,
+            launchProfiles.GetProfiles(),
+            launchProfiles.GetHotkeys());
+        manifestPath = Path.Combine(
+            Path.GetTempPath(),
+            $"meeting-assistant-desktop-{Environment.ProcessId}.json");
+        File.WriteAllText(
+            manifestPath,
+            JsonSerializer.Serialize(
+                manifest,
+                new JsonSerializerOptions(JsonSerializerDefaults.Web)));
+
+        helper = Process.Start(new ProcessStartInfo
+        {
+            FileName = helperPath,
+            ArgumentList = { manifestPath },
+            UseShellExecute = false,
+            CreateNoWindow = true
+        });
+
+        if (helper is null)
+        {
+            throw new InvalidOperationException("Could not start the macOS desktop controls helper.");
+        }
+
+        helper.EnableRaisingEvents = true;
+        helper.Exited += (_, _) =>
+        {
+            if (!applicationLifetime.ApplicationStopping.IsCancellationRequested)
+            {
+                logger.LogWarning("macOS desktop controls helper exited unexpectedly");
+            }
+        };
+        logger.LogInformation("Started macOS menu-bar controls with {HotkeyCount} global hotkeys", manifest.Hotkeys.Count);
+        return Task.CompletedTask;
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken)
+    {
+        if (helper is { HasExited: false })
+        {
+            helper.Kill();
+            helper.WaitForExit(TimeSpan.FromSeconds(2));
+        }
+
+        DeleteManifest();
+        return Task.CompletedTask;
+    }
+
+    public void Dispose()
+    {
+        helper?.Dispose();
+        DeleteManifest();
+    }
+
+    private void DeleteManifest()
+    {
+        if (manifestPath is not null && File.Exists(manifestPath))
+        {
+            File.Delete(manifestPath);
+            manifestPath = null;
+        }
+    }
+}
@@ -0,0 +1,161 @@
+using System.Diagnostics;
+using MeetingAssistant.Workflow;
+using Microsoft.Extensions.Options;
+
+namespace MeetingAssistant.MacOs;
+
+public sealed class MacOsWorkflowRulesEditorWindowService : IWorkflowRulesEditorWindowService
+{
+    private readonly IOptions<MeetingAssistantOptions> options;
+
+    public MacOsWorkflowRulesEditorWindowService(IOptions<MeetingAssistantOptions> options)
+    {
+        this.options = options;
+    }
+
+    public void Show()
+    {
+        if (!OperatingSystem.IsMacOS())
+        {
+            return;
+        }
+
+        var url = $"{options.Value.Api.PublicBaseUrl.TrimEnd('/')}/diagnostics/settings-and-logs";
+        Process.Start(new ProcessStartInfo
+        {
+            FileName = "/usr/bin/open",
+            ArgumentList = { url },
+            UseShellExecute = false
+        });
+    }
+}
+
+public sealed class MacOsWorkflowRulesEditorSession
+{
+    private readonly WorkflowRulesEditorChatViewModel viewModel;
+    private readonly SemaphoreSlim sendLock = new(1, 1);
+
+    public MacOsWorkflowRulesEditorSession(WorkflowRulesEditorChatViewModel viewModel)
+    {
+        this.viewModel = viewModel;
+    }
+
+    public async Task<MacOsWorkflowRulesEditorChatResponse> SendAsync(
+        string? message,
+        CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(message))
+        {
+            return Snapshot();
+        }
+
+        await sendLock.WaitAsync(cancellationToken);
+        try
+        {
+            viewModel.Draft = message;
+            await viewModel.SendAsync(cancellationToken);
+            return Snapshot();
+        }
+        finally
+        {
+            sendLock.Release();
+        }
+    }
+
+    private MacOsWorkflowRulesEditorChatResponse Snapshot()
+    {
+        return new MacOsWorkflowRulesEditorChatResponse(
+            viewModel.Messages
+                .Where(item => item.Kind == WorkflowRulesEditorConversationItemKind.Message)
+                .Select(item => new MacOsWorkflowRulesEditorMessage(
+                    item.Message!.Role.ToString().ToLowerInvariant(),
+                    item.Message.Content))
+                .ToArray());
+    }
+}
+
+public sealed record MacOsWorkflowRulesEditorChatRequest(string? Message);
+
+public sealed record MacOsWorkflowRulesEditorChatResponse(
+    IReadOnlyList<MacOsWorkflowRulesEditorMessage> Messages);
+
+public sealed record MacOsWorkflowRulesEditorMessage(string Role, string Content);
+
+public static class MacOsWorkflowRulesEditorPage
+{
+    public const string Html = """
+        <!doctype html>
+        <html lang="en">
+        <head>
+          <meta charset="utf-8">
+          <meta name="viewport" content="width=device-width,initial-scale=1">
+          <title>Meeting Summary Agent</title>
+          <style>
+            :root { color-scheme: dark; font: 15px -apple-system, BlinkMacSystemFont, sans-serif; }
+            * { box-sizing: border-box; }
+            body { margin: 0; background: #171719; color: #f5f5f7; }
+            main { height: 100vh; display: grid; grid-template-rows: auto 1fr auto; padding: 18px; gap: 14px; }
+            h1 { margin: 0; font-size: 18px; }
+            #messages { overflow: auto; display: flex; flex-direction: column; gap: 10px; }
+            .message { max-width: 82%; padding: 10px 12px; border: 1px solid #414147; border-radius: 10px; white-space: pre-wrap; }
+            .user { align-self: flex-end; background: #293650; }
+            .agent { align-self: flex-start; background: #232326; }
+            form { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
+            textarea { min-height: 78px; resize: vertical; border-radius: 9px; border: 1px solid #55555d; background: #222225; color: inherit; padding: 10px; font: inherit; }
+            button { min-width: 96px; border: 0; border-radius: 9px; background: #0a84ff; color: white; font-weight: 600; }
+            button:disabled { opacity: .55; }
+          </style>
+        </head>
+        <body>
+          <main>
+            <h1>Meeting Summary Agent</h1>
+            <section id="messages"></section>
+            <form id="chat">
+              <textarea id="prompt" placeholder="ask me what I can do for you"></textarea>
+              <button id="send">Send</button>
+            </form>
+          </main>
+          <script>
+            const form = document.querySelector('#chat');
+            const prompt = document.querySelector('#prompt');
+            const send = document.querySelector('#send');
+            const messages = document.querySelector('#messages');
+            const render = items => {
+              messages.replaceChildren(...items.map(item => {
+                const card = document.createElement('div');
+                card.className = `message ${item.role}`;
+                card.textContent = item.content;
+                return card;
+              }));
+              messages.scrollTop = messages.scrollHeight;
+            };
+            form.addEventListener('submit', async event => {
+              event.preventDefault();
+              const message = prompt.value.trim();
+              if (!message) return;
+              prompt.value = '';
+              send.disabled = true;
+              try {
+                const response = await fetch('/diagnostics/settings-and-logs/chat', {
+                  method: 'POST',
+                  headers: {'content-type': 'application/json'},
+                  body: JSON.stringify({message})
+                });
+                const body = await response.json();
+                render(body.messages);
+              } finally {
+                send.disabled = false;
+                prompt.focus();
+              }
+            });
+            prompt.addEventListener('keydown', event => {
+              if (event.key === 'Enter' && !event.shiftKey) {
+                event.preventDefault();
+                form.requestSubmit();
+              }
+            });
+          </script>
+        </body>
+        </html>
+        """;
+}
@@ -16,13 +16,15 @@
  </PropertyGroup>

  <PropertyGroup Condition="$([MSBuild]::IsOSPlatform('OSX')) and $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'windows'">
-    <MacOsAudioCaptureEnabled>true</MacOsAudioCaptureEnabled>
+    <MacOsNativeHelpersEnabled>true</MacOsNativeHelpersEnabled>
    <MacOsAudioCaptureSource>$(MSBuildProjectDirectory)/Native/MacOsMeetingAudioCapture/main.swift</MacOsAudioCaptureSource>
    <MacOsAudioCaptureOutputPath>Native/macos-meeting-audio-capture</MacOsAudioCaptureOutputPath>
    <MacOsAudioCaptureRid Condition="'$(RuntimeIdentifier)' != ''">$(RuntimeIdentifier)</MacOsAudioCaptureRid>
    <MacOsAudioCaptureRid Condition="'$(MacOsAudioCaptureRid)' == ''">$(NETCoreSdkRuntimeIdentifier)</MacOsAudioCaptureRid>
    <MacOsAudioCaptureArchitecture Condition="'$(MacOsAudioCaptureRid)' == 'osx-x64'">x86_64</MacOsAudioCaptureArchitecture>
    <MacOsAudioCaptureArchitecture Condition="'$(MacOsAudioCaptureArchitecture)' == ''">arm64</MacOsAudioCaptureArchitecture>
+    <MacOsDesktopControlsSource>$(MSBuildProjectDirectory)/Native/MacOsDesktopControls/main.swift</MacOsDesktopControlsSource>
+    <MacOsDesktopControlsOutputPath>Native/macos-desktop-controls</MacOsDesktopControlsOutputPath>
  </PropertyGroup>

  <ItemGroup>
@@ -72,19 +74,21 @@
  </Target>

  <Target
-    Name="BuildMacOsAudioCaptureHelper"
+    Name="BuildMacOsNativeHelpers"
    AfterTargets="Build"
-    Condition="'$(MacOsAudioCaptureEnabled)' == 'true'">
+    Condition="'$(MacOsNativeHelpersEnabled)' == 'true'">
    <MakeDir Directories="$(TargetDir)Native" />
    <Exec Command="/usr/bin/xcrun swiftc -parse-as-library -O -target $(MacOsAudioCaptureArchitecture)-apple-macos13.0 -framework AVFoundation -framework CoreMedia -framework ScreenCaptureKit &quot;$(MacOsAudioCaptureSource)&quot; -o &quot;$(TargetDir)$(MacOsAudioCaptureOutputPath)&quot;" />
+    <Exec Command="/usr/bin/xcrun swiftc -parse-as-library -O -target $(MacOsAudioCaptureArchitecture)-apple-macos13.0 -framework AppKit -framework Carbon -framework WebKit &quot;$(MacOsDesktopControlsSource)&quot; -o &quot;$(TargetDir)$(MacOsDesktopControlsOutputPath)&quot;" />
  </Target>

  <Target
-    Name="CopyMacOsAudioCaptureHelperToPublish"
+    Name="CopyMacOsNativeHelpersToPublish"
    AfterTargets="Publish"
-    Condition="'$(MacOsAudioCaptureEnabled)' == 'true'">
+    Condition="'$(MacOsNativeHelpersEnabled)' == 'true'">
    <MakeDir Directories="$(PublishDir)Native" />
    <Copy SourceFiles="$(TargetDir)$(MacOsAudioCaptureOutputPath)" DestinationFolder="$(PublishDir)Native" />
+    <Copy SourceFiles="$(TargetDir)$(MacOsDesktopControlsOutputPath)" DestinationFolder="$(PublishDir)Native" />
  </Target>

  <ItemGroup Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'windows'">
@@ -0,0 +1,289 @@
+import AppKit
+import Carbon
+import Foundation
+import WebKit
+
+struct Manifest: Decodable {
+    let baseUrl: String
+    let statusUrl: String
+    let openAgentUrl: String
+    let profiles: [Profile]
+    let hotkeys: [Hotkey]
+}
+
+struct Profile: Decodable {
+    let name: String
+    let toggleShortcut: String
+}
+
+struct Hotkey: Decodable {
+    let shortcut: String
+    let endpoint: String
+}
+
+struct RecordingStatus: Decodable {
+    let isRecording: Bool
+    let state: String
+    let launchProfile: String?
+}
+
+@main
+final class DesktopControls: NSObject, NSApplicationDelegate, NSMenuDelegate {
+    private let manifest: Manifest
+    private var status = RecordingStatus(isRecording: false, state: "Idle", launchProfile: nil)
+    private var statusItem: NSStatusItem!
+    private var registeredHotkeys: [UInt32: Hotkey] = [:]
+    private var timer: Timer?
+    private var agentWindow: NSWindow?
+
+    override init() {
+        guard CommandLine.arguments.count == 2,
+              let data = try? Data(contentsOf: URL(fileURLWithPath: CommandLine.arguments[1])),
+              let decoded = try? JSONDecoder().decode(Manifest.self, from: data) else {
+            fputs("Usage: macos-desktop-controls <manifest.json>\n", stderr)
+            exit(2)
+        }
+        manifest = decoded
+        super.init()
+    }
+
+    static func main() {
+        let application = NSApplication.shared
+        let delegate = DesktopControls()
+        application.delegate = delegate
+        application.setActivationPolicy(.accessory)
+        application.run()
+    }
+
+    func applicationDidFinishLaunching(_ notification: Notification) {
+        statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)
+        statusItem.button?.image = NSImage(
+            systemSymbolName: "waveform.circle",
+            accessibilityDescription: "Meeting Assistant")
+        let menu = NSMenu()
+        menu.delegate = self
+        statusItem.menu = menu
+        registerHotkeys()
+        refreshStatus()
+        timer = Timer.scheduledTimer(withTimeInterval: 2, repeats: true) { [weak self] _ in
+            self?.refreshStatus()
+        }
+    }
+
+    func applicationWillTerminate(_ notification: Notification) {
+        timer?.invalidate()
+    }
+
+    func menuWillOpen(_ menu: NSMenu) {
+        rebuildMenu(menu)
+        refreshStatus()
+    }
+
+    private func rebuildMenu(_ menu: NSMenu) {
+        menu.removeAllItems()
+        let stateItem = NSMenuItem(title: tooltip, action: nil, keyEquivalent: "")
+        stateItem.isEnabled = false
+        menu.addItem(stateItem)
+        menu.addItem(.separator())
+        menu.addItem(item("Open agent", #selector(openAgent)))
+
+        if status.isRecording {
+            menu.addItem(item("Stop meeting recording and transcribe", #selector(stopRecording)))
+            menu.addItem(item("Cancel meeting recording and discard", #selector(abortRecording)))
+        } else {
+            for (index, profile) in manifest.profiles.enumerated() {
+                let entry = item(
+                    "Start meeting recording (\(profile.name))",
+                    #selector(startProfile(_:)))
+                entry.tag = index
+                entry.keyEquivalent = menuKey(from: profile.toggleShortcut)
+                entry.keyEquivalentModifierMask = menuModifiers(from: profile.toggleShortcut)
+                menu.addItem(entry)
+            }
+        }
+        menu.addItem(.separator())
+        menu.addItem(item("Exit", #selector(exitApplication)))
+    }
+
+    private var tooltip: String {
+        if status.isRecording {
+            return status.launchProfile.map { "Meeting Assistant — recording (\($0))" }
+                ?? "Meeting Assistant — recording"
+        }
+        return status.state.lowercased() == "summarizing"
+            ? "Meeting Assistant — summarizing"
+            : "Meeting Assistant — idle"
+    }
+
+    private func item(_ title: String, _ action: Selector) -> NSMenuItem {
+        let result = NSMenuItem(title: title, action: action, keyEquivalent: "")
+        result.target = self
+        return result
+    }
+
+    @objc private func openAgent() {
+        if agentWindow == nil {
+            let webView = WKWebView(frame: .zero)
+            let window = NSWindow(
+                contentRect: NSRect(x: 0, y: 0, width: 840, height: 760),
+                styleMask: [.titled, .closable, .miniaturizable, .resizable],
+                backing: .buffered,
+                defer: false)
+            window.title = "Meeting Summary Agent"
+            window.contentView = webView
+            window.center()
+            window.isReleasedWhenClosed = false
+            webView.load(URLRequest(url: URL(string: manifest.openAgentUrl)!))
+            agentWindow = window
+        }
+        NSApplication.shared.activate(ignoringOtherApps: true)
+        agentWindow?.makeKeyAndOrderFront(nil)
+    }
+
+    @objc private func startProfile(_ sender: NSMenuItem) {
+        let profile = manifest.profiles[sender.tag]
+        post(path: "/profiles/\(escaped(profile.name))/recording/start")
+    }
+
+    @objc private func stopRecording() {
+        post(path: "/recording/stop")
+    }
+
+    @objc private func abortRecording() {
+        post(path: "/recording/abort")
+    }
+
+    @objc private func exitApplication() {
+        post(path: "/application/exit")
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
+            NSApplication.shared.terminate(nil)
+        }
+    }
+
+    private func refreshStatus() {
+        guard let url = URL(string: manifest.statusUrl) else { return }
+        URLSession.shared.dataTask(with: url) { [weak self] data, _, _ in
+            guard let data,
+                  let next = try? JSONDecoder().decode(RecordingStatus.self, from: data) else { return }
+            DispatchQueue.main.async {
+                self?.status = next
+                self?.statusItem.button?.image = NSImage(
+                    systemSymbolName: next.isRecording ? "record.circle.fill" : "waveform.circle",
+                    accessibilityDescription: self?.tooltip)
+            }
+        }.resume()
+    }
+
+    private func post(path: String) {
+        post(url: manifest.baseUrl + path)
+    }
+
+    private func post(url value: String) {
+        guard let url = URL(string: value) else { return }
+        var request = URLRequest(url: url)
+        request.httpMethod = "POST"
+        URLSession.shared.dataTask(with: request) { [weak self] _, _, _ in
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
+                self?.refreshStatus()
+            }
+        }.resume()
+    }
+
+    private func registerHotkeys() {
+        var eventType = EventTypeSpec(
+            eventClass: OSType(kEventClassKeyboard),
+            eventKind: OSType(kEventHotKeyPressed))
+        InstallEventHandler(
+            GetApplicationEventTarget(),
+            { _, event, context in
+                guard let event, let context else { return noErr }
+                var identifier = EventHotKeyID()
+                GetEventParameter(
+                    event,
+                    EventParamName(kEventParamDirectObject),
+                    EventParamType(typeEventHotKeyID),
+                    nil,
+                    MemoryLayout<EventHotKeyID>.size,
+                    nil,
+                    &identifier)
+                let owner = Unmanaged<DesktopControls>.fromOpaque(context).takeUnretainedValue()
+                if let hotkey = owner.registeredHotkeys[identifier.id] {
+                    owner.post(path: hotkey.endpoint)
+                }
+                return noErr
+            },
+            1,
+            &eventType,
+            Unmanaged.passUnretained(self).toOpaque(),
+            nil)
+
+        for (index, hotkey) in manifest.hotkeys.enumerated() {
+            guard let keyCode = carbonKeyCode(from: hotkey.shortcut) else { continue }
+            let identifier = EventHotKeyID(signature: fourCC("MTGA"), id: UInt32(index + 1))
+            var reference: EventHotKeyRef?
+            let result = RegisterEventHotKey(
+                keyCode,
+                carbonModifiers(from: hotkey.shortcut),
+                identifier,
+                GetApplicationEventTarget(),
+                0,
+                &reference)
+            if result == noErr {
+                registeredHotkeys[identifier.id] = hotkey
+            }
+        }
+    }
+
+    private func escaped(_ value: String) -> String {
+        value.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? value
+    }
+}
+
+private func tokens(_ shortcut: String) -> [String] {
+    shortcut.uppercased().split(separator: "+").map(String.init)
+}
+
+private func carbonModifiers(from shortcut: String) -> UInt32 {
+    let parts = tokens(shortcut)
+    var result: UInt32 = 0
+    if parts.contains("CTRL") || parts.contains("CONTROL") { result |= UInt32(controlKey) }
+    if parts.contains("ALT") || parts.contains("OPTION") { result |= UInt32(optionKey) }
+    if parts.contains("SHIFT") { result |= UInt32(shiftKey) }
+    if parts.contains("WIN") || parts.contains("WINDOWS") || parts.contains("CMD") || parts.contains("COMMAND") {
+        result |= UInt32(cmdKey)
+    }
+    return result
+}
+
+private func menuModifiers(from shortcut: String) -> NSEvent.ModifierFlags {
+    let parts = tokens(shortcut)
+    var result: NSEvent.ModifierFlags = []
+    if parts.contains("CTRL") || parts.contains("CONTROL") { result.insert(.control) }
+    if parts.contains("ALT") || parts.contains("OPTION") { result.insert(.option) }
+    if parts.contains("SHIFT") { result.insert(.shift) }
+    if parts.contains("WIN") || parts.contains("WINDOWS") || parts.contains("CMD") || parts.contains("COMMAND") {
+        result.insert(.command)
+    }
+    return result
+}
+
+private func menuKey(from shortcut: String) -> String {
+    tokens(shortcut).last?.lowercased() ?? ""
+}
+
+private func carbonKeyCode(from shortcut: String) -> UInt32? {
+    guard let key = tokens(shortcut).last, key.count == 1, let scalar = key.unicodeScalars.first else {
+        return nil
+    }
+    let codes: [Character: UInt32] = [
+        "A": 0, "S": 1, "D": 2, "F": 3, "H": 4, "G": 5, "Z": 6, "X": 7,
+        "C": 8, "V": 9, "B": 11, "Q": 12, "W": 13, "E": 14, "R": 15,
+        "Y": 16, "T": 17, "M": 46, "L": 37, "N": 45, "P": 35, "O": 31,
+        "I": 34, "U": 32, "J": 38, "K": 40
+    ]
+    return codes[Character(String(scalar))]
+}
+
+private func fourCC(_ value: String) -> OSType {
+    value.utf8.reduce(0) { ($0 << 8) + OSType($1) }
+}
@@ -3,6 +3,7 @@ using MeetingAssistant.Calendar;
 using MeetingAssistant.Hotkeys;
 using MeetingAssistant.LaunchProfiles;
 using MeetingAssistant.Logging;
+using MeetingAssistant.MacOs;
 using MeetingAssistant.MeetingNotes;
 using MeetingAssistant.Recording;
 using MeetingAssistant.Screenshots;
@@ -38,6 +39,7 @@ builder.Services.AddSingleton<IMeetingMetadataProvider, OutlookClassicMeetingMet
 #else
 PortableMeetingAudioRegistration.Add(builder.Services);
 builder.Services.AddSingleton<IMeetingMetadataProvider, NoopMeetingMetadataProvider>();
+builder.Services.AddHostedService<MacOsDesktopControlService>();
 #endif
 builder.Services.AddSingleton<ITranscriptStore, VaultTranscriptStore>();
 builder.Services.AddSingleton<IMeetingNoteStore, MarkdownMeetingNoteStore>();
@@ -111,7 +113,8 @@ builder.Services.AddSingleton(services => WorkflowRulesEditorMarkdownLinkResolve
    services.GetRequiredService<IOptions<MeetingAssistantOptions>>().Value));
 builder.Services.AddSingleton<IWorkflowRulesEditorWindowService, WpfWorkflowRulesEditorWindowService>();
 #else
-builder.Services.AddSingleton<IWorkflowRulesEditorWindowService, NoopWorkflowRulesEditorWindowService>();
+builder.Services.AddSingleton<MacOsWorkflowRulesEditorSession>();
+builder.Services.AddSingleton<IWorkflowRulesEditorWindowService, MacOsWorkflowRulesEditorWindowService>();
 #endif
 builder.Services.AddSingleton<AsrDiagnosticService>();
 builder.Services.AddSingleton<ICommandRunner, ProcessCommandRunner>();
@@ -152,6 +155,11 @@ app.MapGet("/recording/status", (MeetingRecordingCoordinator coordinator) => Res
 app.MapGet("/profiles/{launchProfile}/recording/status", (
    string launchProfile,
    MeetingRecordingCoordinator coordinator) => Results.Ok(coordinator.CurrentStatus));
+app.MapPost("/application/exit", (IHostApplicationLifetime lifetime) =>
+{
+    lifetime.StopApplication();
+    return Results.Accepted();
+});
 app.MapGet("/diagnostics/outlook/current-meeting", async (
    IMeetingMetadataProvider metadataProvider,
    IOptions<MeetingAssistantOptions> options,
@@ -281,6 +289,15 @@ app.MapPost("/diagnostics/settings-and-logs/show", (
    rulesEditorWindow.Show();
    return Results.Accepted();
 });
+#if !WINDOWS
+app.MapGet("/diagnostics/settings-and-logs", () =>
+    Results.Content(MacOsWorkflowRulesEditorPage.Html, "text/html"));
+app.MapPost("/diagnostics/settings-and-logs/chat", async (
+    MacOsWorkflowRulesEditorChatRequest request,
+    MacOsWorkflowRulesEditorSession session,
+    CancellationToken cancellationToken) =>
+    Results.Ok(await session.SendAsync(request.Message, cancellationToken)));
+#endif

 static WorkflowConfigurationReloadResponse ReloadWorkflowConfiguration(IConfiguration configuration)
 {
@@ -323,6 +340,11 @@ app.MapPost("/profiles/{launchProfile}/recording/abort", async (
    MeetingRecordingCoordinator coordinator,
    CancellationToken cancellationToken) =>
    Results.Ok(await coordinator.AbortAsync(cancellationToken)));
+app.MapPost("/profiles/{launchProfile}/meetings/screenshot/capture", async (
+    string launchProfile,
+    MeetingRecordingCoordinator coordinator,
+    CancellationToken cancellationToken) =>
+    Results.Ok(await coordinator.CaptureScreenshotAsync(launchProfile, cancellationToken)));
 app.MapPost("/meetings/current/summary/run", async (
    MeetingRecordingCoordinator coordinator,
    IMeetingSummaryPipeline summaryPipeline,
@@ -9,7 +9,7 @@ This repository owns the application source, tests, OpenSpec requirements, confi
 The app is intentionally local-first:

 - Windows builds provide the tray icon, global hotkeys, NAudio capture, Outlook Classic COM enrichment, active-window screenshots, and notifications.
- Portable builds on macOS capture the default microphone through AVFoundation and computer output through ScreenCaptureKit, while keeping Windows-only desktop integrations compiled out.
+- Portable builds on macOS provide a native menu-bar icon and global hotkeys, and capture the default microphone through AVFoundation plus computer output through ScreenCaptureKit.
 - Portable builds on other hosts keep the server/testable service surface but do not provide meeting audio capture.
 - The normal runtime endpoint is local HTTP on port `5090`, with `/health` and `/recording/status` as the safe first checks.
 - Behavior changes are OpenSpec-driven; current accepted requirements live under `openspec/specs`.
@@ -32,7 +32,7 @@ dotnet build MeetingAssistant/MeetingAssistant.csproj -f net10.0
 dotnet run --project MeetingAssistant/MeetingAssistant.csproj -f net10.0
 ```

-The macOS build compiles the bundled Swift capture helper into `Native/macos-meeting-audio-capture`. On first recording, allow both **Microphone** and **Screen & System Audio Recording** under System Settings > Privacy & Security. macOS recording is controlled through the local HTTP endpoints because the tray icon and global hotkeys remain Windows-only.
+The macOS build compiles bundled Swift helpers into `Native/macos-meeting-audio-capture` and `Native/macos-desktop-controls`. On first recording, allow both **Microphone** and **Screen & System Audio Recording** under System Settings > Privacy & Security. The menu-bar icon and global hotkeys use the same configured bindings as Windows and call the local service surface.

 For the durable local background instance, use the snippets restart helper:

@@ -58,7 +58,7 @@ Do not restart while a meeting is recording, transcribing, finalizing speaker re

 ## Runtime Behavior

-Recording can be controlled through global hotkeys, the Windows tray icon, or local HTTP endpoints. The default hotkeys are:
+Recording can be controlled through global hotkeys, the Windows tray icon, the macOS menu-bar icon, or local HTTP endpoints. The default hotkeys are:

 - `Ctrl+Alt+M`: toggle the default recording profile.
 - `Ctrl+Alt+L`: toggle or switch to the configured `english` launch profile.
@@ -142,9 +142,9 @@ See `docs/meeting-assistant-configuration.md` for the full configuration referen

 Meeting-specific automation lives in a local YAML file, not in committed personal rules. Rules can trigger on meeting creation, assistant-context state transitions, identified speakers, transcript-line writes, and added attendees. They can add/remove attendees, set supported properties, add context, add projects, rewrite a transcript line, and transform an attendee name before it is stored.

-The tray menu exposes `Open agent`, which opens the `Meeting Summary Agent` window. It can edit workflow rules with validation, inspect logs and health/status, manage speaker identities and samples, run ASR diagnostics, and read/write scoped meeting/project artifacts through explicit tools.
+The Windows tray and macOS menu-bar menus expose `Open agent`, which opens the `Meeting Summary Agent` window. It can edit workflow rules with validation, inspect logs and health/status, manage speaker identities and samples, run ASR diagnostics, and read/write scoped meeting/project artifacts through explicit tools. Windows renders the chat with WPF; macOS renders the same agent pipeline in a native AppKit window backed by WebKit.

-At startup, Meeting Assistant detects whether the host is Windows or macOS and includes that immutable runtime context in the interactive settings/logs assistant instructions. On Windows the assistant uses Windows commands and concepts such as PowerShell, Windows paths, services, and Task Manager. On macOS it uses zsh, POSIX paths, launchd/LaunchAgents, and Activity Monitor. This guidance is also appended when a custom interactive-agent prompt is configured. macOS audio capture is available in the portable build; Windows-only tray, hotkey, Outlook, notification, and screenshot features remain unavailable there.
+At startup, Meeting Assistant detects whether the host is Windows or macOS and includes that immutable runtime context in the interactive settings/logs assistant instructions. On Windows the assistant uses Windows commands and concepts such as PowerShell, Windows paths, services, and Task Manager. On macOS it uses zsh, POSIX paths, launchd/LaunchAgents, and Activity Monitor. This guidance is also appended when a custom interactive-agent prompt is configured. macOS audio capture, menu-bar controls, and global hotkeys are available in the portable build; Outlook, Windows notifications, and active-window screenshot capture remain Windows-only.

 Detailed workflow syntax and extension guidance live in `docs/meeting-workflow-engine.md`.

@@ -0,0 +1,23 @@
+## Context
+
+The application already exposes local HTTP endpoints for recording lifecycle actions. Windows desktop integrations invoke the coordinator in-process, while macOS currently has no desktop process capable of participating in AppKit or Carbon event loops.
+
+## Decisions
+
+### Native helper owns macOS desktop APIs
+
+A bundled Swift helper owns the AppKit status item and Carbon global-hotkey registrations. The .NET host starts the helper only on macOS and terminates it during shutdown.
+
+### Existing HTTP endpoints remain the control seam
+
+The helper invokes loopback endpoints for recording and diagnostic actions. It does not duplicate recording state or lifecycle policy. It polls the status endpoint to keep the menu-bar presentation current.
+
+### Configuration is passed as an explicit manifest
+
+The .NET host derives a manifest from configured launch profiles. Shortcut strings are passed unchanged so macOS uses the same bindings displayed and registered on Windows.
+
+## Verification
+
+- Behavior tests prove the manifest preserves configured shortcuts and maps actions to the existing endpoints.
+- The Swift helper supports a describe/self-test mode for deterministic packaging validation.
+- Runtime verification launches the application, starts a new recording, and captures the visible macOS menu-bar recording state.
@@ -0,0 +1,98 @@
+# Implementation Evidence
+
+## Automated
+
+- `dotnet test MeetingAssistant.Tests/MeetingAssistant.Tests.csproj --filter FullyQualifiedName~MacOsDesktopControlManifestTests --no-restore`
+  - Passed: 1, Failed: 0.
+- `dotnet build MeetingAssistant/MeetingAssistant.csproj -f net10.0 --no-restore`
+  - Passed and produced `Native/macos-desktop-controls` as an arm64 Mach-O executable.
+- `openspec validate add-macos-desktop-controls --strict`
+  - Passed.
+- Full portable test project:
+  - Passed: 427.
+  - Failed: 9 existing macOS/environment-dependent tests: Windows path expectations, unavailable GDI+, and user-environment key resolution.
+- Whole solution:
+  - Cannot build the Windows target on macOS without enabling cross-Windows targeting (`NETSDK1100`).
+
+## Runtime
+
+- Installed the rebuilt application assembly and both native helpers into the existing local LaunchAgent application directory.
+- LaunchAgent restarted successfully.
+- `/health` returned `ok`.
+- `macos-desktop-controls` ran as a child companion process.
+- The helper manifest contained six configured hotkeys, including the unchanged defaults `Ctrl+Alt+M`, `Ctrl+Alt+L`, `Ctrl+Alt+Z`, and `Ctrl+Alt+S`.
+- A fresh default-profile recording request created the `20260724-2015` meeting note and linked artifacts.
+- Screenshot evidence: `tmp/macos-desktop-recording-verification.png`.
+
+## Live desktop-control proof (2026-07-24)
+
+- The installed LaunchAgent ran:
+  - `.NET host` PID `23023`
+  - native `macos-desktop-controls` PID `23097`
+- The native helper manifest exposed:
+  - `Ctrl+Alt+M` -> `/profiles/default/recording/toggle`
+  - `Ctrl+Alt+L` -> `/profiles/english/recording/toggle`
+  - `Ctrl+Alt+Z` -> `/profiles/default/recording/abort`
+  - `Ctrl+Alt+S` -> `/profiles/default/meetings/screenshot/capture`
+- Accessibility inspection of the real AppKit menu returned:
+  - `Meeting Assistant — idle`
+  - `Open agent`
+  - `Start meeting recording (default)`
+  - `Start meeting recording (english)`
+  - `Exit`
+- Visible menu screenshot:
+  - `tmp/proof-macos-menu-idle.png`
+  - The menu visibly displays the macOS equivalents `⌃⌥M` and `⌃⌥L`.
+- Clicking `Start meeting recording (default)` through the real menu produced the sampled status transition `false,true,false`, with `launchProfile: default`, and created:
+  - `Meetings/Notes/20260724-2022-note.md`
+  - `Meetings/Transcripts/20260724-2022-transcript.md`
+  - `Meetings/Assistant Context/20260724-2022-context.md`
+- Posting the HID-level `Ctrl+Alt+M` combination produced the sampled status transition `false,true,false`, with `launchProfile: default`.
+- Posting the HID-level `Ctrl+Alt+L` combination produced an active sampled state with `launchProfile: english`.
+- Raw sampled status evidence:
+  - `tmp/proof-menu-recording-status.jsonl`
+  - `tmp/proof-hotkey-recording-status.jsonl`
+  - `tmp/proof-english-hotkey-status.jsonl`
+
+## Runtime limitation
+
+The new recording did not remain active because the local audio capture process stopped shortly after artifact creation. The desktop-control helper, menu-bar item, endpoint routing, and meeting creation were verified; sustained audio capture was not.
+
+## Open agent regression and runtime proof
+
+- Original deterministic regression:
+  - `MacOsApplicationRegistersARealInteractiveAgentWindow`
+  - Red result: portable registration resolved exactly `NoopWorkflowRulesEditorWindowService`.
+- Fix:
+  - macOS now registers `MacOsWorkflowRulesEditorWindowService`.
+  - `Open agent` in the native helper creates an AppKit `NSWindow` titled `Meeting Summary Agent`.
+  - The window hosts a WebKit chat page backed by the existing `WorkflowRulesEditorChatViewModel` and agent pipeline.
+- Green regression:
+  - Passed: 1, Failed: 0.
+- Live installed runtime:
+  - Clicking the actual menu item created an on-screen CoreGraphics window:
+    - owner: `macos-desktop-controls`
+    - title: `Meeting Summary Agent`
+    - layer: `0`
+    - bounds: `756x714`
+  - `GET /diagnostics/settings-and-logs` returned the interactive agent HTML page.
+
+## Open agent prompt execution proof (2026-07-25)
+
+- Original live failure:
+  - `Meeting Summary Agent failed: No workflow rules editor API key configured.`
+- Root cause:
+  - The LaunchAgent did not inherit the interactive shell's model API key.
+  - Its configured `127.0.0.1:4021` model endpoint had no running service.
+- Runtime configuration:
+  - The protected LaunchAgent environment file now supplies the local LiteLLM gateway key.
+  - `MeetingAssistant__WorkflowRulesEditor__Endpoint` targets the running local gateway on port `4000`.
+  - The local gateway exposes the Responses-compatible `chatgpt-gpt-5.5` model alias.
+- Event-stream compatibility regression:
+  - `ClientReconstructsResponseFromServerSentEvents` failed before the fix with `JsonReaderException`.
+  - The client now reconstructs completed response items from LiteLLM server-sent events.
+  - All 11 `LiteLlmResponsesChatClientTests` pass.
+- Live installed proof:
+  - `POST /diagnostics/settings-and-logs/chat` with `Reply with exactly: key-ok`
+    returned `{"role":"agent","content":"key-ok"}`.
+  - `/health` returned successfully after deployment.
@@ -0,0 +1,24 @@
+## Why
+
+Meeting Assistant can record audio on macOS, but the portable build does not register the configured global shortcuts or provide the menu-bar controls used for the normal Windows desktop workflow. macOS users must call HTTP endpoints manually.
+
+## What Changes
+
+- Add a native macOS menu-bar companion that starts and stops with Meeting Assistant.
+- Register the same configured recording, abort, and screenshot shortcuts used on Windows.
+- Expose recording/profile controls, `Open agent`, and exit from the macOS menu bar.
+- Keep recording lifecycle behavior behind the existing local HTTP/service surface.
+
+## Capabilities
+
+### Modified Capabilities
+
+- `meeting-recording`: configured global recording controls work on macOS.
+- `meeting-session`: the desktop control menu is available from the macOS menu bar.
+
+## Impact
+
+- `MeetingAssistant/Native/MacOsDesktopControls`
+- portable macOS build/publish output
+- startup service registration
+- desktop-control behavior tests and macOS runtime documentation
@@ -0,0 +1,20 @@
+## MODIFIED Requirements
+
+### Requirement: Recording mode is controlled by a configurable hotkey
+Meeting Assistant SHALL use normal .NET configuration to define global hotkeys that work on Windows and macOS and toggle recording/transcription mode.
+
+Meeting Assistant SHALL preserve the configured shortcut strings across Windows and macOS, including the defaults `Ctrl+Alt+M`, `Ctrl+Alt+L`, `Ctrl+Alt+Z`, and `Ctrl+Alt+S`.
+
+Meeting Assistant SHALL expose a configurable abort/discard hotkey for an active recording on Windows and macOS.
+
+#### Scenario: macOS uses the configured Windows-equivalent shortcuts
+- **GIVEN** the default and English profiles use `Ctrl+Alt+M` and `Ctrl+Alt+L`
+- **AND** abort and screenshot use `Ctrl+Alt+Z` and `Ctrl+Alt+S`
+- **WHEN** Meeting Assistant starts on macOS
+- **THEN** it registers those same global shortcut combinations
+- **AND** routes them to toggle, abort, and screenshot actions through the local service surface
+
+#### Scenario: macOS recording hotkey starts recording
+- **GIVEN** Meeting Assistant is idle on macOS
+- **WHEN** the user presses the configured recording hotkey
+- **THEN** Meeting Assistant starts recording/transcription mode
@@ -0,0 +1,28 @@
+## MODIFIED Requirements
+
+### Requirement: Workflow rules and speaker identities can be edited through a tray-launched assistant
+Meeting Assistant SHALL expose desktop controls from the Windows tray icon and the macOS menu bar.
+
+The macOS menu-bar control SHALL start with Meeting Assistant, show current recording state, expose each configured launch profile with its configured hotkey, expose stop and abort controls while recording, expose `Open agent`, and expose exit.
+
+Selecting `Open agent` on macOS SHALL open a native window titled `Meeting Summary Agent` containing the interactive settings-and-logs chat surface.
+
+#### Scenario: macOS menu bar shows idle recording controls
+- **GIVEN** Meeting Assistant is idle on macOS
+- **WHEN** the user opens the menu-bar control
+- **THEN** it shows `Open agent`
+- **AND** shows a start action for every configured launch profile
+- **AND** displays each profile's configured toggle hotkey
+- **AND** shows an exit action
+
+#### Scenario: macOS menu bar shows active recording controls
+- **GIVEN** a meeting is recording on macOS
+- **WHEN** the user opens the menu-bar control
+- **THEN** it shows the active recording state
+- **AND** exposes stop and abort actions
+
+#### Scenario: macOS menu opens the interactive agent
+- **GIVEN** Meeting Assistant is running on macOS
+- **WHEN** the user selects `Open agent` from the menu-bar control
+- **THEN** a `Meeting Summary Agent` window opens
+- **AND** the user can submit a chat message and receive the interactive agent response
@@ -0,0 +1,18 @@
+## 1. Contract and behavior
+
+- [x] 1.1 Define macOS desktop-control requirements and design.
+- [x] 1.2 Add a failing behavior test for configured shortcut and endpoint preservation.
+- [x] 1.3 Implement the desktop-control manifest and make the behavior test pass.
+
+## 2. Native macOS integration
+
+- [x] 2.1 Add and package the native macOS menu-bar/global-hotkey helper.
+- [x] 2.2 Start and stop the helper with the .NET application on macOS.
+- [x] 2.3 Add deterministic helper packaging/self-test coverage.
+
+## 3. Verification and closeout
+
+- [x] 3.1 Run narrow and full tests.
+- [x] 3.2 Run strict OpenSpec validation.
+- [x] 3.3 Launch Meeting Assistant, start a new recording, and save screenshot evidence.
+- [x] 3.4 Perform required DRY, SOLID, and KISS refactoring reviews and re-run verification.
@@ -375,3 +375,43 @@ After repairing a meeting or summary, the instructions SHALL direct the agent to
 - **WHEN** the user asks the interactive agent to fix that meeting or its summary
 - **THEN** the agent instructions direct it to inspect the matching assistant context for relevant meeting-specific memory
 - **AND** direct it to append its fixes and conclusions to that assistant context
+
+### Requirement: Interactive agent uses detected host operating-system context
+Meeting Assistant SHALL detect the host operating system when the application starts and SHALL make that immutable runtime context available to the interactive settings/logs assistant.
+
+When the detected host is Windows, the interactive assistant instructions SHALL identify Windows as the runtime platform and SHALL direct the assistant to use Windows-specific commands, paths, services, environment conventions, and desktop concepts instead of macOS concepts.
+
+When the detected host is macOS, the interactive assistant instructions SHALL identify macOS as the runtime platform and SHALL direct the assistant to use macOS-specific commands, POSIX paths, launchd services, environment conventions, and desktop concepts instead of Windows concepts.
+
+Platform-aware instructions SHALL remain present when the interactive assistant uses a configured custom initial prompt.
+
+The instructions SHALL distinguish platform-aware operational guidance from feature availability and SHALL NOT imply that detecting macOS provides Windows-only or otherwise unavailable integrations.
+
+For other detected hosts, Meeting Assistant SHALL identify the platform as unsupported for platform-specific guidance and SHALL direct the assistant to prefer portable tools and concepts rather than assuming Windows or macOS.
+
+#### Scenario: Windows host receives Windows operational guidance
+- **GIVEN** Meeting Assistant detected Windows during startup
+- **WHEN** it builds the interactive settings/logs assistant instructions
+- **THEN** the instructions identify Windows as the runtime platform
+- **AND** direct the assistant to use Windows commands and concepts
+- **AND** direct the assistant not to substitute macOS commands or concepts
+
+#### Scenario: macOS host receives macOS operational guidance
+- **GIVEN** Meeting Assistant detected macOS during startup
+- **WHEN** it builds the interactive settings/logs assistant instructions
+- **THEN** the instructions identify macOS as the runtime platform
+- **AND** direct the assistant to use macOS commands and concepts
+- **AND** direct the assistant not to substitute Windows commands or concepts
+
+#### Scenario: Custom prompt retains detected platform context
+- **GIVEN** Meeting Assistant detected macOS during startup
+- **AND** a custom interactive-assistant initial prompt is configured
+- **WHEN** it builds the interactive assistant instructions
+- **THEN** the instructions contain both the custom prompt and macOS runtime guidance
+
+#### Scenario: Unsupported host uses neutral guidance
+- **GIVEN** Meeting Assistant runs on a host other than Windows or macOS
+- **WHEN** it builds the interactive settings/logs assistant instructions
+- **THEN** the instructions do not label the host as Windows or macOS
+- **AND** direct the assistant to prefer portable tools and concepts
+