Merge pull request '2.4.1' (#7) from 2.4.1 into main

Reviewed-on: #7

.gitignore

@@ -4,6 +4,7 @@
 
 ## User settings
 xcuserdata/
+xcshareddata/
 
 ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9)
 *.xcscmblueprint

DEVELOPMENT.md

@@ -72,17 +72,6 @@ oAI/
 
 ## Building
 
-### Build Scripts
-
-| Script | Architecture | Output |
-|--------|-------------|--------|
-| `build.sh` | Apple Silicon (arm64) | Installs directly to `/Applications` |
-| `build-dmg.sh` | Apple Silicon (arm64) | `oAI-<version>-AppleSilicon.dmg` on Desktop |
-| `build-dmg-universal.sh` | Universal (arm64 + x86_64) | `oAI-<version>-Universal.dmg` on Desktop |
-| `build_nb/sv/da/de/en.sh` | Apple Silicon (arm64) | Build + launch in specific language |
-
-All scripts: find Developer ID cert, clean-build via `xcodebuild`, re-sign with `codesign --options runtime --timestamp`, verify. Version is read from `MARKETING_VERSION` in `project.pbxproj`.
-
 ### Manual Build Commands
 
 ```bash

README.md

@@ -8,19 +8,20 @@ A powerful native macOS AI chat application with support for multiple providers,
 
 ### 🤖 Multi-Provider Support
 - **OpenAI** - GPT models with native API support
-- **Anthropic** - All Claude models
+- **Anthropic** - All Claude models; prompt caching support (direct API and via OpenRouter) reduces cost on repeated system prompts/context
 - **OpenRouter** - Access to 300+ AI models from multiple providers
 - **Ollama** - Local model inference for privacy
 
 ### 💬 Core Chat Capabilities
 - **Streaming Responses** - Real-time token streaming for faster interactions
 - **Conversation Management** - Save, load, export, and search conversations
+- **Combine Conversations** - Merge 2+ saved conversations, either by chronological concatenation or AI-assisted synthesis
 - **File Attachments** - Support for text files, images, and PDFs
-- **Image Generation** - Create images with supported models (DALL-E, Flux, etc.) — renders inline in chat
+- **Image Generation** - Create images with supported models (DALL-E, Flux, etc.) - renders inline in chat
 - **Reasoning / Thinking Tokens** - Stream live reasoning from thinking-capable models (DeepSeek R1, Claude 3.7+, o1/o3, Qwen); configurable effort level (High/Medium/Low/Minimal); collapsible block auto-expands while thinking and collapses when the answer arrives
 - **Online Mode** - DuckDuckGo and Google web search integration
 - **Session Statistics** - Track token usage, costs, and response times
-- **Command History** - Navigate previous commands with searchable modal (⌘H)
+- **Command History** - Navigate previous commands with searchable modal (⇧⌘H)
 
 ### 🧠 Enhanced Memory & Context System
 - **Smart Context Selection** - Automatically select relevant messages to reduce token usage by 50-80%
@@ -51,17 +52,25 @@ Seamless conversation backup and sync across devices:
 
 ### ⚡ Shortcuts & Agent Skills
 - **Shortcuts** - Personal slash commands that expand to prompt templates; optional `{{input}}` placeholder for inline input
-- **Agent Skills (SKILL.md)** - Markdown instruction files injected into the system prompt; compatible with skill0.io, skillsmp.com, and other SKILL.md marketplaces; import as `.md` or `.zip` bundle with attached data files
+- **Agent Skills (SKILL.md)** - Markdown instruction files injected into the system prompt; compatible with skill0.io, skillsmp.com, and other SKILL.md marketplaces; import as `.md` or `.zip` bundle with attached data files; a skill named exactly "2nd Brain" can be marked always-trusted, skipping the bash approval prompt for its helper-script calls
 
 ### 📚 Anytype Integration
 Connect oAI to your local [Anytype](https://anytype.io) knowledge base:
-- **Search** — find objects by keyword across all spaces or within a specific one
-- **Read** — open any object and read its full markdown content
-- **Append** — add content to the end of an existing object without touching existing text or internal links (preferred over full update)
-- **Create** — make new notes, tasks, or pages
-- **Checkbox tools** — surgically toggle to-do checkboxes or set task done/undone via native relation
+- **Search** - find objects by keyword across all spaces or within a specific one
+- **Read** - open any object and read its full markdown content
+- **Append** - add content to the end of an existing object without touching existing text or internal links (preferred over full update)
+- **Create** - make new notes, tasks, or pages
+- **Checkbox tools** - surgically toggle to-do checkboxes or set task done/undone via native relation
 - All data stays on your machine (local API, no cloud)
 
+### 🛰️ Jarvis Integration
+Connect oAI to a self-hosted [Jarvis](https://jarvis.pm) agent-automation server:
+- **Agent Management** - List, create, edit, enable/disable, run, and stop agents
+- **Run History** - Expandable per-run output with status and timing
+- **Usage & Credits** - Per-agent usage stats and credits balance
+- **Queue Control** - Pause/resume all agents
+- `/jarvis` slash command opens the Jarvis panel directly
+
 ### 🖥️ Power-User Features
 - **Bash Execution** - AI can run shell commands via `/bin/zsh` (opt-in, with per-command approval prompt)
 - **iCloud Backup** - One-click settings backup to iCloud Drive; restore on any Mac; API keys excluded for security
@@ -85,9 +94,10 @@ Automated email responses powered by AI:
 - Footer stats display (messages, tokens, cost, sync status)
 - Header status indicators (MCP, Online mode, Git sync)
 - Responsive message layout with copy buttons
-- **Model Selector (⌘M)** - Filter by capability (Vision / Tools / Online / Image Gen / Thinking 🧠), sort by price or context window, search by name or description, per-row ⓘ info button; ★ favourite any model — favourites float to the top and can be filtered in one click
+- **Model Selector (⌘M)** - Filter by capability (Vision / Tools / Online / Image Gen / Thinking 🧠) or by category (Programming, Math, Medical, Translation, Roleplay, Creative, Science, Finance, Legal), sort by price or context window, search by name or description, per-row ⓘ info button; ★ favourite any model - favourites float to the top and can be filtered in one click
 - **Default Model** - Set a fixed startup model in Settings → General; switching models during a session does not overwrite it
-- **Localization** - UI ~~fully translated~~ being translated into Norwegian Bokmål, Swedish, Danish, and German; follows macOS language preference automatically
+- **Sidebar Navigation** - Collapsible sidebar for switching between conversations
+- **Localization** - Fully localized into Norwegian Bokmål, Swedish, Danish, German, and French; follows macOS language preference automatically. Translations are AI-generated (machine translation), not reviewed by native speakers - if you spot an awkward or incorrect phrase, please [open an issue](https://gitlab.pm/rune/oai-swift/issues/new)
 
 ![Advanced Features](Screenshots/4.png)
 
@@ -97,8 +107,8 @@ Automated email responses powered by AI:
 
 Download the latest release from the [Releases page](https://gitlab.pm/rune/oai-swift/releases). Two builds are available:
 
-- **oAI-x.x.x-AppleSilicon.dmg** — for Macs with an Apple Silicon chip (M1 and later)
-- **oAI-x.x.x-Universal.dmg** — runs natively on both Apple Silicon and Intel Macs
+- **oAI-x.x.x-AppleSilicon.dmg** - for Macs with an Apple Silicon chip (M1 and later)
+- **oAI-x.x.x-Universal.dmg** - runs natively on both Apple Silicon and Intel Macs
 
 ### Installing from DMG
 
@@ -107,19 +117,19 @@ Download the latest release from the [Releases page](https://gitlab.pm/rune/oai-
 3. Eject the DMG
 4. Launch oAI from Applications or Spotlight
 
-### First Launch — Gatekeeper Warning
+### First Launch - Gatekeeper Warning
 
-oAI is **signed by the developer** but has **not yet been notarized by Apple**. Notarization is Apple's automated malware scan — the app itself is safe, but macOS Gatekeeper may block it on first launch with a message saying the app "cannot be opened because the developer cannot be verified."
+oAI is **signed by the developer** but has **not yet been notarized by Apple**. Notarization is Apple's automated malware scan - the app itself is safe, but macOS Gatekeeper may block it on first launch with a message saying the app "cannot be opened because the developer cannot be verified."
 
 To open the app, you have two options:
 
-**Option A — Right-click to open (quickest):**
+**Option A - Right-click to open (quickest):**
 1. Right-click (or Control-click) `oAI.app` in Applications
 2. Select **Open** from the context menu
 3. Click **Open** in the dialog that appears
 4. After doing this once, the app opens normally from then on
 
-**Option B — Remove the quarantine flag via Terminal:**
+**Option B - Remove the quarantine flag via Terminal:**
 
 ```bash
 xattr -dr com.apple.quarantine /Applications/oAI.app
@@ -139,7 +149,7 @@ Add your API keys in Settings (⌘,) → General tab:
 - **Anthropic** - Get from [Anthropic Console](https://console.anthropic.com/) or use OAuth
 - **OpenRouter** - Get from [OpenRouter Keys](https://openrouter.ai/keys)
 - **Ollama** - Base URL (default: http://localhost:11434)
-- **Google** - API key used for Google Custom Search (web search) and Google embeddings (semantic search) — not a chat provider
+- **Google** - API key used for Google Custom Search (web search) and Google embeddings (semantic search) - not a chat provider
 
 ### Essential Settings
 
@@ -183,7 +193,7 @@ Add your API keys in Settings (⌘,) → General tab:
 - `/load` or `/list` - List and load saved conversations (⌘L)
 - `/delete <name>` - Delete a saved conversation
 - `/export <md|json> [filename]` - Export conversation
-- `/history` - Open command history modal (⌘H)
+- `/history` - Open command history modal (⇧⌘H)
 
 ### Provider & Settings
 - `/provider [name]` - Switch or display current provider
@@ -228,7 +238,7 @@ Can you review this code? @~/project/main.swift
 - `⌘,` - Open settings
 - `⌘N` - New conversation
 - `⌘L` - List saved conversations
-- `⌘H` - Command history
+- `⇧⌘H` - Command history
 - `Esc` - Cancel generation / Close dropdown
 - `↑/↓` - Navigate command dropdown (when typing `/`)
 - `Return` - Send message
@@ -313,12 +323,16 @@ AI-powered email auto-responder:
 
 - [x] Vector index for faster semantic search (sqlite-vss)
 - [x] Reasoning / thinking tokens (streamed live, collapsible)
-- [x] Localization (Norwegian Bokmål, Swedish, Danish, German)
+- [x] Localization (Norwegian Bokmål, Swedish, Danish, German, French)
 - [x] iCloud Backup (settings export/restore)
 - [x] Bash execution with per-command approval
 - [x] Anytype integration (read, append, create, checkbox tools)
 - [x] Model favourites (starred models, filter, float to top)
-- [ ] SOUL.md / USER.md — living identity documents injected into system prompt
+- [x] Jarvis integration (agent management, run history, usage/credits)
+- [x] Model category filter (Programming, Math, Medical, etc.)
+- [x] Combine saved conversations (concatenation or AI-assisted synthesis)
+- [x] Sidebar navigation redesign
+- [ ] SOUL.md / USER.md - living identity documents injected into system prompt
 - [ ] Parallel research agents (read-only, concurrent)
 - [ ] Local embeddings (sentence-transformers, $0 cost)
 - [ ] Multi-modal conversation export (PDF, HTML)
@@ -332,9 +346,6 @@ This means you are free to use, study, modify, and distribute oAI, but any modif
 
 See [LICENSE](LICENSE) for the full license text, or visit [gnu.org/licenses/agpl-3.0](https://www.gnu.org/licenses/agpl-3.0.html).
 
-## Development
-
-See [DEVELOPMENT.md](DEVELOPMENT.md) for project structure, build scripts, database schema, and contribution guidelines.
 
 ## Author
 
@@ -344,15 +355,12 @@ See [DEVELOPMENT.md](DEVELOPMENT.md) for project structure, build scripts, datab
 - Blog: [https://blog.rune.pm](https://blog.rune.pm)
 - Gitlab.pm: [@rune](https://gitlab.pm/rune)
 
-## Contributing
-
-Contributions are welcome! See [DEVELOPMENT.md](DEVELOPMENT.md) for build instructions and project structure.
 
 ---
 
 ## Disclaimer
 
-oAI takes real actions on your behalf — it can send emails, write files, make calendar changes, and post Telegram messages. Review your whitelist and permission settings carefully before use. Content you send is processed by your configured AI provider (Anthropic, OpenRouter, or OpenAI). oAI-Web is provided "as is" without warranty of any kind — the author accepts no responsibility for actions taken by the agent or any consequences thereof. See LICENSE for full terms.
+oAI takes real actions on your behalf - it can send emails, write files, make calendar changes, and post Telegram messages. Review your whitelist and permission settings carefully before use. Content you send is processed by your configured AI provider (Anthropic, OpenRouter, or OpenAI). oAI-Web is provided "as is" without warranty of any kind - the author accepts no responsibility for actions taken by the agent or any consequences thereof. See LICENSE for full terms.
 
 ---
 

oAI.xcodeproj/project.pbxproj

@@ -104,6 +104,7 @@
 				da,
 				de,
 				sv,
+				fr,
 			);
 			mainGroup = A550A6592F3B72EA00136F2B;
 			minimizedProjectReferenceProxies = 1;
@@ -269,6 +270,11 @@
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_NSCalendarsFullAccessUsageDescription = "oAI can read and create calendar events when you ask it to, if you enable Calendar access in Settings.";
+				INFOPLIST_KEY_NSContactsUsageDescription = "oAI can search your contacts when you ask it to, if you enable Contacts access in Settings.";
+				INFOPLIST_KEY_NSLocationWhenInUseUsageDescription = "oAI can use your current location to answer questions, if you enable Location & Maps access in Settings.";
+				INFOPLIST_KEY_NSRemindersFullAccessUsageDescription = "oAI can read and create reminders when you ask it to, if you enable Reminders access in Settings.";
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;
@@ -282,8 +288,8 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 27.0;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 27.0;
-				MARKETING_VERSION = 2.4.0;
+				MACOSX_DEPLOYMENT_TARGET = 26.2;
+				MARKETING_VERSION = 2.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.oai.oAI;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				REGISTER_APP_GROUPS = YES;
@@ -313,6 +319,11 @@
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_NSCalendarsFullAccessUsageDescription = "oAI can read and create calendar events when you ask it to, if you enable Calendar access in Settings.";
+				INFOPLIST_KEY_NSContactsUsageDescription = "oAI can search your contacts when you ask it to, if you enable Contacts access in Settings.";
+				INFOPLIST_KEY_NSLocationWhenInUseUsageDescription = "oAI can use your current location to answer questions, if you enable Location & Maps access in Settings.";
+				INFOPLIST_KEY_NSRemindersFullAccessUsageDescription = "oAI can read and create reminders when you ask it to, if you enable Reminders access in Settings.";
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;
@@ -326,8 +337,8 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 27.0;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 27.0;
-				MARKETING_VERSION = 2.4.0;
+				MACOSX_DEPLOYMENT_TARGET = 26.2;
+				MARKETING_VERSION = 2.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.oai.oAI;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				REGISTER_APP_GROUPS = YES;

oAI.xcodeproj/xcshareddata/xcschemes/oAI.xcscheme

@@ -1,79 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "2620"
-   version = "1.7">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES"
-      buildArchitectures = "Automatic">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "A550A6612F3B72EA00136F2B"
-               BuildableName = "oAI.app"
-               BlueprintName = "oAI"
-               ReferencedContainer = "container:oAI.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      shouldAutocreateTestPlan = "YES">
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = "en"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "A550A6612F3B72EA00136F2B"
-            BuildableName = "oAI.app"
-            BlueprintName = "oAI"
-            ReferencedContainer = "container:oAI.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Release"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "A550A6612F3B72EA00136F2B"
-            BuildableName = "oAI.app"
-            BlueprintName = "oAI"
-            ReferencedContainer = "container:oAI.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>

oAI/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,20 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0xCA",
+          "green" : "0x7A",
+          "red" : "0x0A"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

oAI/Assets.xcassets/AppLogo.imageset/Contents.json

@@ -4,6 +4,14 @@
       "filename" : "AppLogo.png",
       "idiom" : "universal",
       "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
     }
   ],
   "info" : {

oAI/Models/AgentSkill.swift

@@ -57,4 +57,10 @@ struct AgentSkill: Codable, Identifiable {
         }
         return name
     }
+
+    /// Matches the user's "2nd Brain" skill by name — there's no canonical skill ID,
+    /// so this is the only way to recognize it (used to gate the "always trust" bash setting).
+    var isSecondBrainSkill: Bool {
+        name.trimmingCharacters(in: .whitespacesAndNewlines).caseInsensitiveCompare("2nd Brain") == .orderedSame
+    }
 }

oAI/Models/Conversation.swift

@@ -33,7 +33,7 @@ struct Conversation: Identifiable, Codable {
     var updatedAt: Date
     var primaryModel: String? // Primary model used in this conversation
 
-    init(
+    nonisolated init(
         id: UUID = UUID(),
         name: String,
         messages: [Message] = [],

oAI/Models/EmailLog.swift

@@ -44,7 +44,7 @@ struct EmailLog: Identifiable, Codable, Equatable {
     let responseTime: TimeInterval? // Time to generate response in seconds
     let modelId: String? // Model that handled the email
 
-    init(
+    nonisolated init(
         id: UUID = UUID(),
         timestamp: Date = Date(),
         sender: String,

oAI/Models/Message.swift

@@ -66,7 +66,7 @@ struct Message: Identifiable, Codable, Equatable {
     // Reasoning/thinking content (not persisted — in-memory only)
     var thinkingContent: String? = nil
 
-    init(
+    nonisolated init(
         id: UUID = UUID(),
         role: MessageRole,
         content: String,

oAI/Models/ModelInfo.swift

@@ -47,6 +47,7 @@ struct ModelInfo: Identifiable, Codable, Hashable {
         let online: Bool           // Web search
         var imageGeneration: Bool = false  // Image output
         var thinking: Bool = false         // Reasoning/thinking tokens
+        var usesImagesAPI: Bool = false    // OpenRouter dedicated /images endpoint
     }
 
     struct Architecture: Codable, Hashable {

oAI/Models/Settings.swift

@@ -58,25 +58,17 @@ struct Settings: Codable {
         case anthropic
         case openai
         case ollama
-        case appleOnDevice = "apple_on_device"
-
+        
         var displayName: String {
-            switch self {
-            case .openrouter:     return "OpenRouter"
-            case .anthropic:      return "Anthropic"
-            case .openai:         return "OpenAI"
-            case .ollama:         return "Ollama"
-            case .appleOnDevice:  return "Apple Intelligence"
-            }
+            rawValue.capitalized
         }
-
+        
         var iconName: String {
             switch self {
-            case .openrouter:     return "network"
-            case .anthropic:      return "brain"
-            case .openai:         return "sparkles"
-            case .ollama:         return "server.rack"
-            case .appleOnDevice:  return "apple.logo"
+            case .openrouter: return "network"
+            case .anthropic: return "brain"
+            case .openai: return "sparkles"
+            case .ollama: return "server.rack"
             }
         }
     }

oAI/Providers/AIProvider.swift

@@ -130,11 +130,37 @@ struct ChatResponse: Codable {
         let promptTokens: Int
         let completionTokens: Int
         let totalTokens: Int
+        let cacheCreationInputTokens: Int?
+        let cacheReadInputTokens: Int?
+        /// Direct USD cost returned by the images API (bypasses token-based calculation).
+        let rawCostUSD: Double?
 
+        init(promptTokens: Int, completionTokens: Int, totalTokens: Int, cacheCreationInputTokens: Int? = nil, cacheReadInputTokens: Int? = nil, rawCostUSD: Double? = nil) {
+            self.promptTokens = promptTokens
+            self.completionTokens = completionTokens
+            self.totalTokens = totalTokens
+            self.cacheCreationInputTokens = cacheCreationInputTokens
+            self.cacheReadInputTokens = cacheReadInputTokens
+            self.rawCostUSD = rawCostUSD
+        }
+
+        // rawCostUSD is set programmatically, never decoded from API responses
         enum CodingKeys: String, CodingKey {
             case promptTokens = "prompt_tokens"
             case completionTokens = "completion_tokens"
             case totalTokens = "total_tokens"
+            case cacheCreationInputTokens = "cache_creation_input_tokens"
+            case cacheReadInputTokens = "cache_read_input_tokens"
+        }
+
+        init(from decoder: Decoder) throws {
+            let c = try decoder.container(keyedBy: CodingKeys.self)
+            promptTokens = try c.decode(Int.self, forKey: .promptTokens)
+            completionTokens = try c.decode(Int.self, forKey: .completionTokens)
+            totalTokens = try c.decode(Int.self, forKey: .totalTokens)
+            cacheCreationInputTokens = try c.decodeIfPresent(Int.self, forKey: .cacheCreationInputTokens)
+            cacheReadInputTokens = try c.decodeIfPresent(Int.self, forKey: .cacheReadInputTokens)
+            rawCostUSD = nil
         }
     }
 
@@ -217,6 +243,19 @@ struct Tool: Codable {
                 let type: String
                 let description: String
                 let `enum`: [String]?
+                let items: Items?
+
+                /// Item schema for `type: "array"` properties (e.g. an array of strings).
+                struct Items: Codable {
+                    let type: String
+                }
+
+                init(type: String, description: String, enum: [String]? = nil, items: Items? = nil) {
+                    self.type = type
+                    self.description = description
+                    self.enum = `enum`
+                    self.items = items
+                }
             }
         }
     }

oAI/Providers/AnthropicProvider.swift

@@ -77,6 +77,15 @@ class AnthropicProvider: AIProvider {
     /// falls back to prefix matching so newly-released model variants (e.g. "claude-sonnet-4-6-20260301")
     /// still inherit the correct pricing tier.
     private static let knownModels: [ModelInfo] = [
+        // Claude Fable 5
+        ModelInfo(
+            id: "claude-fable-5",
+            name: "Claude Fable 5",
+            description: "Anthropic's creative and storytelling model",
+            contextLength: 200_000,
+            pricing: .init(prompt: 10.0, completion: 50.0),
+            capabilities: .init(vision: true, tools: true, online: true)
+        ),
         // Claude 4.x series
         ModelInfo(
             id: "claude-opus-4-6",
@@ -173,6 +182,7 @@ class AnthropicProvider: AIProvider {
     /// Pricing tiers used for fuzzy fallback matching on unknown model IDs.
     /// Keyed by model name prefix (longest match wins).
     private static let pricingFallback: [(prefix: String, prompt: Double, completion: Double)] = [
+        ("claude-fable",  10.0, 50.0),
         ("claude-opus",   15.0, 75.0),
         ("claude-sonnet",  3.0, 15.0),
         ("claude-haiku",   0.80, 4.0),
@@ -356,6 +366,19 @@ class AnthropicProvider: AIProvider {
             }
         }
 
+        // Mark the last message with a cache breakpoint so the next loop
+        // iteration (or next turn) can reuse everything up through this one.
+        if var lastMessage = conversationMessages.popLast() {
+            if let content = lastMessage["content"] as? String {
+                lastMessage["content"] = [["type": "text", "text": content, "cache_control": ["type": "ephemeral"]]]
+            } else if var blocks = lastMessage["content"] as? [[String: Any]], var lastBlock = blocks.popLast() {
+                lastBlock["cache_control"] = ["type": "ephemeral"]
+                blocks.append(lastBlock)
+                lastMessage["content"] = blocks
+            }
+            conversationMessages.append(lastMessage)
+        }
+
         var body: [String: Any] = [
             "model": model,
             "messages": conversationMessages,
@@ -363,7 +386,9 @@ class AnthropicProvider: AIProvider {
             "stream": false
         ]
         if let systemText = systemText {
-            body["system"] = systemText
+            // Array form carries a cache breakpoint; also covers tools, which
+            // render before system in Anthropic's prefix order.
+            body["system"] = [["type": "text", "text": systemText, "cache_control": ["type": "ephemeral"]]]
         }
         if let temperature = temperature {
             body["temperature"] = temperature
@@ -430,6 +455,8 @@ class AnthropicProvider: AIProvider {
                     var currentId = ""
                     var currentModel = request.model
                     var inputTokens = 0
+                    var cacheCreationTokens: Int? = nil
+                    var cacheReadTokens: Int? = nil
 
                     for try await line in bytes.lines {
                         // Anthropic SSE: "event: ..." and "data: {...}"
@@ -449,6 +476,11 @@ class AnthropicProvider: AIProvider {
                                 currentModel = message["model"] as? String ?? request.model
                                 if let usageDict = message["usage"] as? [String: Any] {
                                     inputTokens = usageDict["input_tokens"] as? Int ?? 0
+                                    cacheCreationTokens = usageDict["cache_creation_input_tokens"] as? Int
+                                    cacheReadTokens = usageDict["cache_read_input_tokens"] as? Int
+                                    if cacheCreationTokens != nil || cacheReadTokens != nil {
+                                        Log.api.info("Anthropic stream cache usage: input=\(inputTokens), created=\(cacheCreationTokens ?? 0), read=\(cacheReadTokens ?? 0)")
+                                    }
                                 }
                             }
 
@@ -472,7 +504,13 @@ class AnthropicProvider: AIProvider {
                             var usage: ChatResponse.Usage? = nil
                             if let usageDict = event["usage"] as? [String: Any] {
                                 let outputTokens = usageDict["output_tokens"] as? Int ?? 0
-                                usage = ChatResponse.Usage(promptTokens: inputTokens, completionTokens: outputTokens, totalTokens: inputTokens + outputTokens)
+                                usage = ChatResponse.Usage(
+                                    promptTokens: inputTokens,
+                                    completionTokens: outputTokens,
+                                    totalTokens: inputTokens + outputTokens,
+                                    cacheCreationInputTokens: cacheCreationTokens,
+                                    cacheReadInputTokens: cacheReadTokens
+                                )
                             }
                             continuation.yield(StreamChunk(
                                 id: currentId,
@@ -582,6 +620,19 @@ class AnthropicProvider: AIProvider {
             }
         }
 
+        // Mark the last message with a cache breakpoint so the next turn can
+        // reuse everything up through this one as a cached prefix.
+        if var lastMessage = apiMessages.popLast() {
+            if let content = lastMessage["content"] as? String {
+                lastMessage["content"] = [["type": "text", "text": content, "cache_control": ["type": "ephemeral"]]]
+            } else if var blocks = lastMessage["content"] as? [[String: Any]], var lastBlock = blocks.popLast() {
+                lastBlock["cache_control"] = ["type": "ephemeral"]
+                blocks.append(lastBlock)
+                lastMessage["content"] = blocks
+            }
+            apiMessages.append(lastMessage)
+        }
+
         var body: [String: Any] = [
             "model": request.model,
             "messages": apiMessages,
@@ -590,7 +641,10 @@ class AnthropicProvider: AIProvider {
         ]
 
         if let systemText = systemText {
-            body["system"] = systemText
+            // Array form (rather than a plain string) carries a cache breakpoint.
+            // Per Anthropic's render order (tools -> system -> messages), this
+            // single breakpoint caches the tool definitions too.
+            body["system"] = [["type": "text", "text": systemText, "cache_control": ["type": "ephemeral"]]]
         }
         if let temperature = request.temperature {
             body["temperature"] = temperature
@@ -665,6 +719,11 @@ class AnthropicProvider: AIProvider {
         let usageDict = json["usage"] as? [String: Any]
         let inputTokens = usageDict?["input_tokens"] as? Int ?? 0
         let outputTokens = usageDict?["output_tokens"] as? Int ?? 0
+        let cacheCreationTokens = usageDict?["cache_creation_input_tokens"] as? Int
+        let cacheReadTokens = usageDict?["cache_read_input_tokens"] as? Int
+        if cacheCreationTokens != nil || cacheReadTokens != nil {
+            Log.api.info("Anthropic cache usage: input=\(inputTokens), created=\(cacheCreationTokens ?? 0), read=\(cacheReadTokens ?? 0)")
+        }
 
         return ChatResponse(
             id: id,
@@ -675,7 +734,9 @@ class AnthropicProvider: AIProvider {
             usage: ChatResponse.Usage(
                 promptTokens: inputTokens,
                 completionTokens: outputTokens,
-                totalTokens: inputTokens + outputTokens
+                totalTokens: inputTokens + outputTokens,
+                cacheCreationInputTokens: cacheCreationTokens,
+                cacheReadInputTokens: cacheReadTokens
             ),
             created: Date(),
             toolCalls: toolCalls.isEmpty ? nil : toolCalls
@@ -692,6 +753,9 @@ class AnthropicProvider: AIProvider {
             if let enumVals = prop.enum {
                 propDict["enum"] = enumVals
             }
+            if let items = prop.items {
+                propDict["items"] = ["type": items.type]
+            }
             props[key] = propDict
         }
         var dict: [String: Any] = [

oAI/Providers/AppleFoundationProvider.swift

@@ -1,195 +0,0 @@
-//
-//  AppleFoundationProvider.swift
-//  oAI
-//
-//  Apple Foundation Models provider (on-device Apple Intelligence)
-//
-// SPDX-License-Identifier: AGPL-3.0-or-later
-// Copyright (C) 2026 Rune Olsen
-//
-// This file is part of oAI.
-//
-// oAI is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as
-// published by the Free Software Foundation, either version 3 of the
-// License, or (at your option) any later version.
-//
-// oAI is distributed in the hope that it will be useful, but WITHOUT
-// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
-// Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public
-// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
-
-
-import Foundation
-import FoundationModels
-import os
-
-final class AppleFoundationProvider: AIProvider {
-    let name = "Apple Intelligence"
-
-    let capabilities = ProviderCapabilities(
-        supportsStreaming: true,
-        supportsVision: false,
-        supportsTools: false,
-        supportsOnlineSearch: false,
-        maxContextLength: 4096
-    )
-
-    // MARK: - Models
-
-    func listModels() async throws -> [ModelInfo] {
-        [
-            ModelInfo(
-                id: "apple-on-device",
-                name: "Apple On-Device",
-                description: "On-device Apple Intelligence model. Private, free, and works offline. 4K context window.",
-                contextLength: 4096,
-                pricing: ModelInfo.Pricing(prompt: 0, completion: 0),
-                capabilities: ModelInfo.ModelCapabilities(
-                    vision: false,
-                    tools: false,
-                    online: false
-                )
-            )
-        ]
-    }
-
-    func getModel(_ id: String) async throws -> ModelInfo? {
-        try await listModels().first { $0.id == id }
-    }
-
-    func getCredits() async throws -> Credits? { nil }
-
-    // MARK: - Streaming chat
-
-    func streamChat(request: ChatRequest) -> AsyncThrowingStream<StreamChunk, Error> {
-        AsyncThrowingStream { continuation in
-            Task {
-                do {
-                    let session = try self.makeSession(for: request)
-                    let prompt = self.lastUserMessage(from: request)
-
-                    // streamResponse(to: String) → ResponseStream<String>
-                    // Each snapshot.content is the full accumulated text so far (snapshot model).
-                    // We compute deltas by comparing each snapshot to the previous.
-                    let stream = session.streamResponse(to: prompt)
-                    var lastContent = ""
-
-                    for try await snapshot in stream {
-                        let current = snapshot.content
-                        if current.count > lastContent.count {
-                            let delta = String(current.dropFirst(lastContent.count))
-                            continuation.yield(StreamChunk(
-                                id: UUID().uuidString,
-                                model: request.model,
-                                delta: StreamChunk.Delta(content: delta, role: "assistant"),
-                                finishReason: nil,
-                                usage: nil
-                            ))
-                            lastContent = current
-                        }
-                    }
-
-                    continuation.yield(StreamChunk(
-                        id: UUID().uuidString,
-                        model: request.model,
-                        delta: StreamChunk.Delta(content: nil, role: nil),
-                        finishReason: "stop",
-                        usage: nil
-                    ))
-                    continuation.finish()
-
-                } catch let genError as LanguageModelSession.GenerationError {
-                    continuation.finish(throwing: self.mapGenerationError(genError))
-                } catch {
-                    continuation.finish(throwing: error)
-                }
-            }
-        }
-    }
-
-    // MARK: - Non-streaming chat
-
-    func chat(request: ChatRequest) async throws -> ChatResponse {
-        let session = try makeSession(for: request)
-        let prompt = lastUserMessage(from: request)
-        let response: LanguageModelSession.Response<String> = try await session.respond(to: prompt)
-        return ChatResponse(
-            id: UUID().uuidString,
-            model: request.model,
-            content: response.content,
-            role: "assistant",
-            finishReason: "stop",
-            usage: nil,
-            created: Date()
-        )
-    }
-
-    // MARK: - Tool messages (not supported in Phase 1)
-
-    func chatWithToolMessages(model: String, messages: [[String: Any]], tools: [Tool]?, maxTokens: Int?, temperature: Double?) async throws -> ChatResponse {
-        throw ProviderError.unknown("Tool calling requires Apple Foundation Models Phase 3.")
-    }
-
-    // MARK: - Session construction
-
-    private func makeSession(for request: ChatRequest) throws -> LanguageModelSession {
-        guard case .available = SystemLanguageModel.default.availability else {
-            throw availabilityError()
-        }
-
-        // Build instructions: system prompt + prior conversation turns as formatted text.
-        // Foundation Models sessions don't accept a message array — we inject history inline.
-        var instructions = request.systemPrompt ?? ""
-        let priorMessages = request.messages.dropLast().filter { $0.role != .system }
-
-        if !priorMessages.isEmpty {
-            let history = priorMessages
-                .map { m -> String in
-                    let label = m.role == .user ? "User" : "Assistant"
-                    return "\(label): \(m.content)"
-                }
-                .joined(separator: "\n")
-            instructions += "\n\nConversation so far:\n\(history)\n\nContinue from here."
-        }
-
-        return instructions.isEmpty
-            ? LanguageModelSession()
-            : LanguageModelSession(instructions: instructions)
-    }
-
-    private func lastUserMessage(from request: ChatRequest) -> String {
-        request.messages.last(where: { $0.role == .user })?.content ?? ""
-    }
-
-    // MARK: - Error mapping
-
-    private func availabilityError() -> Error {
-        switch SystemLanguageModel.default.availability {
-        case .unavailable(.deviceNotEligible):
-            return ProviderError.unknown("This Mac doesn't support Apple Intelligence. Apple Silicon is required.")
-        case .unavailable(.appleIntelligenceNotEnabled):
-            return ProviderError.unknown("Apple Intelligence is not enabled. Open System Settings → Apple Intelligence to turn it on.")
-        case .unavailable(.modelNotReady):
-            return ProviderError.unknown("Apple Intelligence model is still downloading. Please wait and try again.")
-        default:
-            return ProviderError.unknown("Apple Intelligence is not available on this device.")
-        }
-    }
-
-    private func mapGenerationError(_ error: LanguageModelSession.GenerationError) -> Error {
-        switch error {
-        case .exceededContextWindowSize:
-            return ProviderError.unknown("Apple Intelligence context limit exceeded (4,096 tokens). Start a new chat or enable Progressive Summarization in Settings → Advanced.")
-        case .rateLimited:
-            return ProviderError.rateLimitExceeded
-        case .guardrailViolation:
-            return ProviderError.unknown("Apple Intelligence declined to respond to this message.")
-        default:
-            return error
-        }
-    }
-}

oAI/Providers/OpenRouterModels.swift

@@ -48,7 +48,12 @@ struct OpenRouterChatRequest: Codable {
     let toolChoice: String?
     let modalities: [String]?
     let reasoning: ReasoningAPIConfig?
-    
+    let cacheControl: CacheControl?
+
+    struct CacheControl: Codable {
+        let type: String
+    }
+
     struct APIMessage: Codable {
         let role: String
         let content: MessageContent
@@ -138,6 +143,7 @@ struct OpenRouterChatRequest: Codable {
         case toolChoice = "tool_choice"
         case modalities
         case reasoning
+        case cacheControl = "cache_control"
     }
 }
 
@@ -225,11 +231,23 @@ struct OpenRouterChatResponse: Codable {
         let promptTokens: Int
         let completionTokens: Int
         let totalTokens: Int
-        
+        let promptTokensDetails: PromptTokensDetails?
+
+        struct PromptTokensDetails: Codable {
+            let cachedTokens: Int?
+            let cacheWriteTokens: Int?
+
+            enum CodingKeys: String, CodingKey {
+                case cachedTokens = "cached_tokens"
+                case cacheWriteTokens = "cache_write_tokens"
+            }
+        }
+
         enum CodingKeys: String, CodingKey {
             case promptTokens = "prompt_tokens"
             case completionTokens = "completion_tokens"
             case totalTokens = "total_tokens"
+            case promptTokensDetails = "prompt_tokens_details"
         }
     }
 }
@@ -402,6 +420,67 @@ struct ToolResultMessage: Encodable {
     }
 }
 
+// MARK: - Images API — Model Discovery
+
+struct OpenRouterImageModelsResponse: Codable {
+    let data: [ImageModelData]
+
+    struct ImageModelData: Codable {
+        let id: String
+        let name: String
+        let description: String?
+        let architecture: Architecture?
+        let supportsStreaming: Bool?
+
+        struct Architecture: Codable {
+            let inputModalities: [String]?
+            let outputModalities: [String]?
+
+            enum CodingKeys: String, CodingKey {
+                case inputModalities = "input_modalities"
+                case outputModalities = "output_modalities"
+            }
+        }
+
+        enum CodingKeys: String, CodingKey {
+            case id, name, description, architecture
+            case supportsStreaming = "supports_streaming"
+        }
+    }
+}
+
+// MARK: - Images API — Generation Response
+
+struct OpenRouterImageGenerationResponse: Codable {
+    let created: Int?
+    let data: [ImageData]
+    let usage: Usage?
+
+    struct ImageData: Codable {
+        let b64Json: String
+        let mediaType: String?
+
+        enum CodingKeys: String, CodingKey {
+            case b64Json = "b64_json"
+            case mediaType = "media_type"
+        }
+    }
+
+    struct Usage: Codable {
+        let promptTokens: Int
+        let completionTokens: Int
+        let totalTokens: Int
+        let cost: Double?
+
+        enum CodingKeys: String, CodingKey {
+            case promptTokens = "prompt_tokens"
+            case completionTokens = "completion_tokens"
+            case totalTokens = "total_tokens"
+            case cost
+        }
+    }
+}
+
 // MARK: - Error Response
 
 struct OpenRouterErrorResponse: Codable {

oAI/Providers/OpenRouterProvider.swift

@@ -53,30 +53,16 @@ class OpenRouterProvider: AIProvider {
     
     func listModels() async throws -> [ModelInfo] {
         Log.api.info("Fetching model list from OpenRouter")
-        let url = URL(string: "\(baseURL)/models")!
-        var request = URLRequest(url: url)
-        request.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
-        request.addValue("application/json", forHTTPHeaderField: "Content-Type")
 
-        let (data, response) = try await session.data(for: request)
+        // Fetch chat models and image models in parallel
+        async let chatData = fetchRaw(path: "/models")
+        async let imageData = fetchRaw(path: "/images/models")
+        let (chatRaw, imageRaw) = try await (chatData, imageData)
 
-        guard let httpResponse = response as? HTTPURLResponse else {
-            Log.api.error("OpenRouter models: invalid response (not HTTP)")
-            throw ProviderError.invalidResponse
-        }
+        let modelsResponse = try JSONDecoder().decode(OpenRouterModelsResponse.self, from: chatRaw)
+        Log.api.info("OpenRouter loaded \(modelsResponse.data.count) chat models")
 
-        guard httpResponse.statusCode == 200 else {
-            if let errorResponse = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
-                Log.api.error("OpenRouter models HTTP \(httpResponse.statusCode): \(errorResponse.error.message)")
-                throw ProviderError.unknown(errorResponse.error.message)
-            }
-            Log.api.error("OpenRouter models HTTP \(httpResponse.statusCode)")
-            throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
-        }
-        
-        let modelsResponse = try JSONDecoder().decode(OpenRouterModelsResponse.self, from: data)
-        Log.api.info("OpenRouter loaded \(modelsResponse.data.count) models")
-        return modelsResponse.data.map { modelData in
+        var models = modelsResponse.data.map { modelData in
             let promptPrice = Double(modelData.pricing.prompt) ?? 0.0
             let completionPrice = Double(modelData.pricing.completion) ?? 0.0
             
@@ -129,8 +115,110 @@ class OpenRouterProvider: AIProvider {
             )
             return info
         }
+
+        // Merge dedicated image models (these don't appear in /models)
+        if let imageModelsResponse = try? JSONDecoder().decode(OpenRouterImageModelsResponse.self, from: imageRaw) {
+            Log.api.info("OpenRouter loaded \(imageModelsResponse.data.count) image models")
+            let existingIds = Set(models.map { $0.id })
+            let imageModels = imageModelsResponse.data.compactMap { m -> ModelInfo? in
+                guard !existingIds.contains(m.id) else { return nil }
+                let acceptsImageInput = m.architecture?.inputModalities?.contains("image") ?? false
+                var info = ModelInfo(
+                    id: m.id,
+                    name: m.name,
+                    description: m.description,
+                    contextLength: 0,
+                    pricing: ModelInfo.Pricing(prompt: 0, completion: 0),
+                    capabilities: ModelInfo.ModelCapabilities(
+                        vision: acceptsImageInput,
+                        tools: false,
+                        online: false,
+                        imageGeneration: true,
+                        thinking: false,
+                        usesImagesAPI: true
+                    ),
+                    topProvider: m.id.components(separatedBy: "/").first
+                )
+                info.categories = ModelCategory.infer(name: m.name, id: m.id, description: m.description)
+                return info
+            }
+            models.append(contentsOf: imageModels)
+        }
+
+        return models
     }
-    
+
+    private func fetchRaw(path: String) async throws -> Data {
+        let url = URL(string: "\(baseURL)\(path)")!
+        var request = URLRequest(url: url)
+        request.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
+        request.addValue("application/json", forHTTPHeaderField: "Content-Type")
+        let (data, response) = try await session.data(for: request)
+        guard let httpResponse = response as? HTTPURLResponse else { throw ProviderError.invalidResponse }
+        guard httpResponse.statusCode == 200 else {
+            if let err = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
+                throw ProviderError.unknown(err.error.message)
+            }
+            throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
+        }
+        return data
+    }
+
+    // MARK: - Images API
+
+    func generateImage(model: String, prompt: String) async throws -> ChatResponse {
+        Log.api.info("OpenRouter images API: model=\(model)")
+        let url = URL(string: "\(baseURL)/images")!
+        var urlRequest = URLRequest(url: url)
+        urlRequest.httpMethod = "POST"
+        urlRequest.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
+        urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
+        urlRequest.addValue("https://github.com/yourusername/oAI", forHTTPHeaderField: "HTTP-Referer")
+        urlRequest.addValue("oAI-Swift", forHTTPHeaderField: "X-Title")
+        urlRequest.httpBody = try JSONSerialization.data(withJSONObject: ["model": model, "prompt": prompt])
+
+        let (data, response) = try await session.data(for: urlRequest)
+        guard let httpResponse = response as? HTTPURLResponse else { throw ProviderError.invalidResponse }
+
+        if httpResponse.statusCode != 200 {
+            if let err = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
+                Log.api.error("OpenRouter images HTTP \(httpResponse.statusCode): \(err.error.message)")
+                throw ProviderError.unknown(err.error.message)
+            }
+            Log.api.error("OpenRouter images HTTP \(httpResponse.statusCode)")
+            throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
+        }
+
+        if let rawStr = String(data: data, encoding: .utf8) {
+            Log.api.debug("Images API raw response (first 200 chars): \(rawStr.prefix(200))")
+        }
+
+        let imageResponse = try JSONDecoder().decode(OpenRouterImageGenerationResponse.self, from: data)
+        let images: [Data] = imageResponse.data.compactMap { item in
+            Data(base64Encoded: item.b64Json)
+        }
+
+        let usage: ChatResponse.Usage? = imageResponse.usage.map { u in
+            ChatResponse.Usage(
+                promptTokens: u.promptTokens,
+                completionTokens: u.completionTokens,
+                totalTokens: u.totalTokens,
+                rawCostUSD: u.cost
+            )
+        }
+
+        return ChatResponse(
+            id: UUID().uuidString,
+            model: model,
+            content: "",
+            role: "assistant",
+            finishReason: "stop",
+            usage: usage,
+            created: Date(),
+            generatedImages: images.isEmpty ? nil : images
+        )
+    }
+
     func getModel(_ id: String) async throws -> ModelInfo? {
         let models = try await listModels()
         return models.first { $0.id == id }
@@ -198,6 +286,11 @@ class OpenRouterProvider: AIProvider {
         }
         if let maxTokens = maxTokens { body["max_tokens"] = maxTokens }
         if let temperature = temperature { body["temperature"] = temperature }
+        // Anthropic models require an explicit cache_control opt-in on OpenRouter;
+        // other providers cache automatically.
+        if model.hasPrefix("anthropic/") {
+            body["cache_control"] = ["type": "ephemeral"]
+        }
 
         var urlRequest = URLRequest(url: url)
         urlRequest.httpMethod = "POST"
@@ -388,6 +481,12 @@ class OpenRouterProvider: AIProvider {
             ReasoningAPIConfig(effort: $0.effort, exclude: $0.exclude ? true : nil)
         }
 
+        // Anthropic models require an explicit cache_control opt-in on OpenRouter;
+        // other providers (OpenAI, DeepSeek, Gemini, Grok, etc.) cache automatically.
+        let cacheControl: OpenRouterChatRequest.CacheControl? = effectiveModel.hasPrefix("anthropic/")
+            ? .init(type: "ephemeral")
+            : nil
+
         return OpenRouterChatRequest(
             model: effectiveModel,
             messages: apiMessages,
@@ -398,7 +497,8 @@ class OpenRouterProvider: AIProvider {
             tools: request.tools,
             toolChoice: request.tools != nil ? "auto" : nil,
             modalities: request.imageGeneration ? ["text", "image"] : nil,
-            reasoning: reasoningConfig
+            reasoning: reasoningConfig,
+            cacheControl: cacheControl
         )
     }
     
@@ -416,6 +516,11 @@ class OpenRouterProvider: AIProvider {
         let allImages = topLevelImages + blockImages
         let images: [Data]? = allImages.isEmpty ? nil : allImages
 
+        if let details = apiResponse.usage?.promptTokensDetails,
+           details.cachedTokens != nil || details.cacheWriteTokens != nil {
+            Log.api.info("OpenRouter cache usage: model=\(apiResponse.model), created=\(details.cacheWriteTokens ?? 0), read=\(details.cachedTokens ?? 0)")
+        }
+
         return ChatResponse(
             id: apiResponse.id,
             model: apiResponse.model,
@@ -426,7 +531,9 @@ class OpenRouterProvider: AIProvider {
                 ChatResponse.Usage(
                     promptTokens: usage.promptTokens,
                     completionTokens: usage.completionTokens,
-                    totalTokens: usage.totalTokens
+                    totalTokens: usage.totalTokens,
+                    cacheCreationInputTokens: usage.promptTokensDetails?.cacheWriteTokens,
+                    cacheReadInputTokens: usage.promptTokensDetails?.cachedTokens
                 )
             },
             created: Date(timeIntervalSince1970: TimeInterval(apiResponse.created)),
@@ -446,6 +553,11 @@ class OpenRouterProvider: AIProvider {
         let allImages = topLevelImages + blockImages
         let images: [Data]? = allImages.isEmpty ? nil : allImages
 
+        if let details = apiChunk.usage?.promptTokensDetails,
+           details.cachedTokens != nil || details.cacheWriteTokens != nil {
+            Log.api.info("OpenRouter stream cache usage: model=\(apiChunk.model), created=\(details.cacheWriteTokens ?? 0), read=\(details.cachedTokens ?? 0)")
+        }
+
         return StreamChunk(
             id: apiChunk.id,
             model: apiChunk.model,
@@ -460,7 +572,9 @@ class OpenRouterProvider: AIProvider {
                 ChatResponse.Usage(
                     promptTokens: usage.promptTokens,
                     completionTokens: usage.completionTokens,
-                    totalTokens: usage.totalTokens
+                    totalTokens: usage.totalTokens,
+                    cacheCreationInputTokens: usage.promptTokensDetails?.cacheWriteTokens,
+                    cacheReadInputTokens: usage.promptTokensDetails?.cachedTokens
                 )
             }
         )

oAI/Providers/ProviderRegistry.swift

@@ -69,9 +69,6 @@ class ProviderRegistry {
 
         case .ollama:
             provider = OllamaProvider(baseURL: settings.ollamaEffectiveURL)
-
-        case .appleOnDevice:
-            provider = AppleFoundationProvider()
         }
         
         // Cache and return
@@ -109,8 +106,6 @@ class ProviderRegistry {
             return settings.openaiAPIKey != nil && !settings.openaiAPIKey!.isEmpty
         case .ollama:
             return settings.ollamaConfigured
-        case .appleOnDevice:
-            return true  // no API key needed
         }
     }
 

oAI/Resources/oAI.help/Contents/Resources/en.lproj/index.html

@@ -36,6 +36,9 @@
                 <li><a href="#shortcuts">Shortcuts (Prompt Templates)</a></li>
                 <li><a href="#agent-skills">Agent Skills (SKILL.md)</a></li>
                 <li><a href="#anytype">Anytype Integration</a></li>
+                <li><a href="#external-mcp">External MCP Servers</a></li>
+                <li><a href="#personal-data">Personal Data Tools</a></li>
+                <li><a href="#research-agents">Research Agents</a></li>
                 <li><a href="#bash-execution">Bash Execution</a></li>
                 <li><a href="#icloud-backup">iCloud Backup</a></li>
                 <li><a href="#reasoning">Reasoning / Thinking Tokens</a></li>
@@ -49,7 +52,7 @@
             <!-- Getting Started -->
             <section id="getting-started">
                 <h2>Getting Started</h2>
-                <p>oAI is a powerful AI chat assistant that connects to multiple AI providers including OpenAI, Anthropic, OpenRouter, and local models via Ollama. The app is available in English, Norwegian Bokmål, Swedish, Danish, and German — it follows your macOS language preference automatically.</p>
+                <p>oAI is a powerful AI chat assistant that connects to multiple AI providers including OpenAI, Anthropic, OpenRouter, and local models via Ollama. The app is available in English, Norwegian Bokmål, Swedish, Danish, German, and French — it follows your macOS language preference automatically.</p>
 
                 <div class="steps">
                     <h3>Quick Start</h3>
@@ -115,6 +118,10 @@
                     <li><strong>🧠 Thinking</strong> — models that support reasoning / thinking tokens</li>
                 </ul>
 
+                <div class="note">
+                    <strong>Note:</strong> On OpenRouter, dedicated image-generation models (e.g. Sourceful, Seedream, Flux) are fetched from OpenRouter's separate images catalog and merged into the picker automatically — you don't need to configure anything extra to see them.
+                </div>
+
                 <h3>Sorting</h3>
                 <p>Click the <strong>↑↓ Sort</strong> button to sort the list by:</p>
                 <ul>
@@ -1370,7 +1377,6 @@ Whenever the user asks you to translate something, translate it to Norwegian Bok
                 </div>
             </section>
 
-            <!-- Keyboard Shortcuts -->
             <!-- Anytype Integration -->
             <section id="anytype">
                 <h2>Anytype Integration</h2>
@@ -1413,6 +1419,104 @@ Whenever the user asks you to translate something, translate it to Norwegian Bok
                 </ul>
             </section>
 
+            <!-- External MCP Servers -->
+            <section id="external-mcp">
+                <h2>External MCP Servers</h2>
+                <p>Connect any external MCP server that speaks the stdio JSON-RPC protocol (for example <code>safaridriver --mcp</code>) and give the AI access to its tools — no custom integration code needed.</p>
+
+                <h3>Adding a Server</h3>
+                <ol>
+                    <li>Press <kbd>⌘,</kbd> to open Settings</li>
+                    <li>Go to the <strong>MCP</strong> tab → <strong>External MCP Servers</strong> section</li>
+                    <li>Click <strong>Add Server…</strong></li>
+                    <li>Enter a <strong>Name</strong> (used to prefix its tools, e.g. "Safari" → <code>safari_navigate_to_url</code>), the <strong>Command</strong> to launch it, and any <strong>Arguments</strong></li>
+                    <li>Click <strong>Add</strong> — the server starts automatically and its tools are discovered</li>
+                </ol>
+
+                <div class="tip">
+                    <strong>💡 Tip:</strong> Arguments containing spaces can be quoted, e.g. <code>--root "/Users/you/My Documents"</code>.
+                </div>
+
+                <h3>Server Status</h3>
+                <p>Each configured server shows a status dot and label:</p>
+                <ul>
+                    <li><strong>🟢 Connected</strong> — running and its tools are available to the AI</li>
+                    <li><strong>🟠 Connecting…</strong> — starting up or performing the initial handshake</li>
+                    <li><strong>🔴 Error / Crashed</strong> — failed to start or exited unexpectedly</li>
+                    <li><strong>⚪ Not started</strong> — disabled via the toggle</li>
+                </ul>
+                <p>Toggle a server off/on or delete it entirely with the trash icon. Crashed servers automatically restart up to 3 times with increasing delay (5s, 15s, 30s) before giving up.</p>
+
+                <div class="note">
+                    <strong>Note:</strong> Tool names from every external server are prefixed with that server's slug (derived from its Name) so they never collide with oAI's built-in tools or each other.
+                </div>
+            </section>
+
+            <!-- Personal Data Tools -->
+            <section id="personal-data">
+                <h2>Personal Data Tools <span style="font-size: 0.75em; background: #f90; color: #fff; border-radius: 4px; padding: 1px 5px; vertical-align: middle;">Beta</span></h2>
+                <p>Let the AI access your Calendar, Reminders, and Location &amp; Maps to answer questions about your schedule and surroundings. Each service is opt-in and uses Apple's own frameworks (EventKit, CoreLocation, MapKit) with standard macOS permission prompts — nothing goes through a third-party service.</p>
+
+                <h3>Enabling a Service</h3>
+                <ol>
+                    <li>Press <kbd>⌘,</kbd> to open Settings</li>
+                    <li>Go to the <strong>MCP</strong> tab → <strong>Personal Data</strong> section</li>
+                    <li>Toggle on the services you want: <strong>Calendar</strong>, <strong>Reminders</strong>, or <strong>Location &amp; Maps</strong></li>
+                    <li>Click <strong>Request Access</strong> next to a service — macOS shows its standard permission prompt</li>
+                </ol>
+
+                <h3>What the AI Can Do</h3>
+                <ul>
+                    <li><strong>Calendar</strong> — list your calendars and upcoming events, create new events</li>
+                    <li><strong>Reminders</strong> — list reminder lists and items, create new reminders, mark reminders complete</li>
+                    <li><strong>Location &amp; Maps</strong> — get your current location, search for places, geocode addresses, and get directions (all read-only)</li>
+                </ul>
+
+                <div class="warning">
+                    <strong>⚠️ Write actions require approval:</strong> Creating a calendar event or reminder, or completing a reminder, shows an approval sheet first with a plain-language summary of what will happen. Choose <strong>Deny</strong>, <strong>Allow Once</strong>, or <strong>Allow for Session</strong>. Toggle this requirement off in Settings → MCP → Personal Data → Require Approval for Changes.
+                </div>
+
+                <div class="note">
+                    <strong>Note:</strong> Contacts support exists internally but is currently hidden while a macOS permission bug affecting hardened-runtime apps is worked out on Apple's side.
+                </div>
+
+                <h3>Example Prompts</h3>
+                <ul>
+                    <li>"What's on my calendar tomorrow?"</li>
+                    <li>"Remind me to call the dentist on Friday at 2pm"</li>
+                    <li>"How far is the nearest coffee shop from here?"</li>
+                </ul>
+            </section>
+
+            <!-- Research Agents -->
+            <section id="research-agents">
+                <h2>Research Agents</h2>
+                <p>For tasks that involve searching or reading many files, the AI can spawn several read-only research sub-agents that work in parallel instead of doing everything itself, one step at a time.</p>
+
+                <div class="warning">
+                    <strong>⚠️ Cost warning:</strong> Each sub-agent runs its own full chain of model calls. A single request that spawns several agents can cost several times a normal reply. Leave this off unless you specifically want that tradeoff.
+                </div>
+
+                <h3>Enabling Research Agents</h3>
+                <ol>
+                    <li>Press <kbd>⌘,</kbd> to open Settings</li>
+                    <li>Go to the <strong>MCP</strong> tab → <strong>Research Agents</strong> section</li>
+                    <li>Toggle <strong>Enable Research Agents</strong> on</li>
+                    <li>Adjust <strong>Max Concurrent Agents</strong> (1–5, default 3) to control how many sub-agents can run at once</li>
+                </ol>
+
+                <h3>What Sub-Agents Can Do</h3>
+                <p>Sub-agents are intentionally limited to read-only investigation — they cannot write files, run shell commands, or spawn further sub-agents:</p>
+                <ul>
+                    <li>Read file contents</li>
+                    <li>List directory contents</li>
+                    <li>Search for files</li>
+                    <li>Search the web</li>
+                </ul>
+
+                <p class="note">Intended for genuinely independent research tasks (e.g. "compare these five files" or "look into three unrelated topics"), not everyday questions — the AI is instructed to reserve this for cases that actually benefit from parallelism.</p>
+            </section>
+
             <section id="keyboard-shortcuts">
                 <h2>Keyboard Shortcuts</h2>
                 <p>Work faster with these keyboard shortcuts.</p>
@@ -1431,7 +1535,7 @@ Whenever the user asks you to translate something, translate it to Norwegian Bok
                     <dt><kbd>⌘L</kbd></dt>
                     <dd>Browse Conversations</dd>
 
-                    <dt><kbd>⌘H</kbd></dt>
+                    <dt><kbd>⇧⌘H</kbd></dt>
                     <dd>Command History</dd>
 
                     <dt><kbd>⌘M</kbd></dt>
@@ -1490,6 +1594,9 @@ Whenever the user asks you to translate something, translate it to Norwegian Bok
                     <li>Enable/disable write, delete, move, and bash execution permissions</li>
                     <li>Configure gitignore respect</li>
                     <li><strong>Bash Execution</strong> — enable AI shell access, set working directory, timeout, and approval behaviour (see <a href="#bash-execution">Bash Execution</a>)</li>
+                    <li><strong>Research Agents</strong> — let the AI spawn parallel read-only research sub-agents (see <a href="#research-agents">Research Agents</a>)</li>
+                    <li><strong>External MCP Servers</strong> — connect any stdio MCP server for additional tools (see <a href="#external-mcp">External MCP Servers</a>)</li>
+                    <li><strong>Personal Data</strong> — Calendar, Reminders, and Location &amp; Maps access (see <a href="#personal-data">Personal Data Tools</a>)</li>
                 </ul>
 
                 <h3>Sync Tab</h3>

oAI/Services/ContactsService.swift

@@ -0,0 +1,250 @@
+//
+//  ContactsService.swift
+//  oAI
+//
+//  Read-only Contacts integration: search and "my card" lookup
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+//
+// This file is part of oAI.
+//
+// oAI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// oAI is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
+// Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public
+// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
+
+
+import Contacts
+import Foundation
+import os
+
+@Observable
+class ContactsService {
+    static let shared = ContactsService()
+
+    private let store = CNContactStore()
+    private let maxResults = 20
+    private let maxScan = 5000
+
+    private init() {}
+
+    // MARK: - Authorization
+
+    var authStatus: CNAuthorizationStatus {
+        CNContactStore.authorizationStatus(for: .contacts)
+    }
+
+    var authorized: Bool {
+        authStatus == .authorized
+    }
+
+    var accessState: PersonalDataAccessState {
+        let status = authStatus
+        Log.mcp.debug("ContactsService.accessState -> status=\(Self.describe(status)) (raw=\(status.rawValue))")
+        switch status {
+        case .authorized: return .granted
+        case .notDetermined: return .notDetermined
+        default: return .denied
+        }
+    }
+
+    @discardableResult
+    func requestAccess() async -> Bool {
+        let before = CNContactStore.authorizationStatus(for: .contacts)
+        Log.mcp.info("ContactsService.requestAccess: status before request = \(Self.describe(before)) (raw=\(before.rawValue))")
+        return await withCheckedContinuation { continuation in
+            store.requestAccess(for: .contacts) { granted, error in
+                let after = CNContactStore.authorizationStatus(for: .contacts)
+                if let error {
+                    Log.mcp.error("ContactsService.requestAccess: error=\(error.localizedDescription); granted=\(granted); status after = \(Self.describe(after)) (raw=\(after.rawValue))")
+                } else {
+                    Log.mcp.info("ContactsService.requestAccess: granted=\(granted); status after = \(Self.describe(after)) (raw=\(after.rawValue))")
+                }
+                continuation.resume(returning: granted)
+            }
+        }
+    }
+
+    nonisolated static func describe(_ status: CNAuthorizationStatus) -> String {
+        switch status {
+        case .notDetermined: return "notDetermined"
+        case .restricted: return "restricted"
+        case .denied: return "denied"
+        case .authorized: return "authorized"
+        case .limited: return "limited"
+        @unknown default: return "unknown"
+        }
+    }
+
+    // MARK: - Tool Schemas
+
+    func getToolSchemas() -> [Tool] {
+        [
+            makeTool(
+                name: "contacts_search",
+                description: "Search Contacts by name, phone number, or email address. Returns matching contacts with their phone numbers and emails. This does NOT match relationship labels like 'mother' or 'spouse' — for those, call contacts_get_me first to find the related person's name, then search for that name.",
+                properties: [
+                    "query": prop("string", "Name, phone number, or email fragment to search for")
+                ],
+                required: ["query"]
+            ),
+            makeTool(
+                name: "contacts_get_me",
+                description: "Get the user's own contact card (\"My Card\" in Contacts.app), if configured. Includes any defined relationships (e.g. mother, spouse, child) with the related person's name — use contacts_search with that name to find their phone/email.",
+                properties: [:],
+                required: []
+            )
+        ]
+    }
+
+    // MARK: - Tool Execution
+
+    func executeTool(name: String, arguments: String) async -> [String: Any] {
+        Log.mcp.info("Executing Contacts tool: \(name)")
+        guard authorized else {
+            return ["error": "Contacts permission not granted. Grant access in Settings > MCP."]
+        }
+
+        switch name {
+        case "contacts_search":
+            guard let data = arguments.data(using: .utf8),
+                  let args = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+                  let query = args["query"] as? String, !query.isEmpty else {
+                return ["error": "Missing required parameter: query"]
+            }
+            return search(query: query)
+
+        case "contacts_get_me":
+            return getMe()
+
+        default:
+            return ["error": "Unknown Contacts tool: \(name)"]
+        }
+    }
+
+    // MARK: - Implementation
+
+    private let keysToFetch: [CNKeyDescriptor] = [
+        CNContactGivenNameKey as CNKeyDescriptor,
+        CNContactFamilyNameKey as CNKeyDescriptor,
+        CNContactOrganizationNameKey as CNKeyDescriptor,
+        CNContactPhoneNumbersKey as CNKeyDescriptor,
+        CNContactEmailAddressesKey as CNKeyDescriptor,
+        CNContactRelationsKey as CNKeyDescriptor
+    ]
+
+    private func search(query: String) -> [String: Any] {
+        var matches: [CNContact] = []
+
+        // Fast path: name predicate
+        let namePredicate = CNContact.predicateForContacts(matchingName: query)
+        if let nameMatches = try? store.unifiedContacts(matching: namePredicate, keysToFetch: keysToFetch) {
+            matches.append(contentsOf: nameMatches)
+        }
+
+        // Fallback: scan for phone/email substring matches
+        if matches.isEmpty {
+            let lowerQuery = query.lowercased()
+            let digitsQuery = query.filter(\.isNumber)
+            let request = CNContactFetchRequest(keysToFetch: keysToFetch)
+            var scanned = 0
+            try? store.enumerateContacts(with: request) { contact, stop in
+                scanned += 1
+                if scanned > self.maxScan || matches.count >= self.maxResults {
+                    stop.pointee = true
+                    return
+                }
+                let emailMatch = contact.emailAddresses.contains {
+                    ($0.value as String).lowercased().contains(lowerQuery)
+                }
+                let phoneMatch = !digitsQuery.isEmpty && contact.phoneNumbers.contains {
+                    $0.value.stringValue.filter(\.isNumber).contains(digitsQuery)
+                }
+                if emailMatch || phoneMatch {
+                    matches.append(contact)
+                }
+            }
+        }
+
+        let deduped = dedupContacts(matches)
+        let formatted = deduped.prefix(maxResults).map(formatContact)
+        return ["count": formatted.count, "contacts": Array(formatted)]
+    }
+
+    /// Collapses contacts that share a phone number or email — Contacts.app's "linked contacts"
+    /// merge doesn't catch every real-world duplicate card, so do a best-effort merge here too.
+    private func dedupContacts(_ contacts: [CNContact]) -> [CNContact] {
+        var result: [CNContact] = []
+        outer: for contact in contacts {
+            let phones = Set(contact.phoneNumbers.map { $0.value.stringValue.filter(\.isNumber) })
+            let emails = Set(contact.emailAddresses.map { ($0.value as String).lowercased() })
+            for existing in result {
+                let existingPhones = Set(existing.phoneNumbers.map { $0.value.stringValue.filter(\.isNumber) })
+                let existingEmails = Set(existing.emailAddresses.map { ($0.value as String).lowercased() })
+                if !phones.isDisjoint(with: existingPhones) || !emails.isDisjoint(with: existingEmails) {
+                    continue outer
+                }
+            }
+            result.append(contact)
+        }
+        return result
+    }
+
+    private func getMe() -> [String: Any] {
+        guard let me = try? store.unifiedMeContactWithKeys(toFetch: keysToFetch) else {
+            return ["error": "No 'My Card' is configured in Contacts.app"]
+        }
+        return formatContact(me)
+    }
+
+    private func formatContact(_ contact: CNContact) -> [String: Any] {
+        var item: [String: Any] = [
+            "given_name": contact.givenName,
+            "family_name": contact.familyName
+        ]
+        if !contact.organizationName.isEmpty {
+            item["organization"] = contact.organizationName
+        }
+        if !contact.phoneNumbers.isEmpty {
+            item["phones"] = contact.phoneNumbers.map { $0.value.stringValue }
+        }
+        if !contact.emailAddresses.isEmpty {
+            item["emails"] = contact.emailAddresses.map { $0.value as String }
+        }
+        if !contact.contactRelations.isEmpty {
+            item["relations"] = contact.contactRelations.map { labeled -> [String: String] in
+                let label = labeled.label.map { CNLabeledValue<CNContactRelation>.localizedString(forLabel: $0) } ?? "relation"
+                return ["label": label, "name": labeled.value.name]
+            }
+        }
+        return item
+    }
+
+    private func makeTool(name: String, description: String, properties: [String: Tool.Function.Parameters.Property], required: [String]) -> Tool {
+        Tool(
+            type: "function",
+            function: Tool.Function(
+                name: name,
+                description: description,
+                parameters: Tool.Function.Parameters(
+                    type: "object",
+                    properties: properties,
+                    required: required
+                )
+            )
+        )
+    }
+
+    private func prop(_ type: String, _ description: String) -> Tool.Function.Parameters.Property {
+        Tool.Function.Parameters.Property(type: type, description: description, enum: nil)
+    }
+}

oAI/Services/ConversationMergeService.swift

@@ -0,0 +1,193 @@
+//
+//  ConversationMergeService.swift
+//  oAI
+//
+//  Combine multiple saved conversations into one (simple concatenation or AI-assisted merge)
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+//
+// This file is part of oAI.
+//
+// oAI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// oAI is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
+// Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public
+// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
+
+
+import Foundation
+import os
+
+enum CombineMode: String, Sendable {
+    case simple
+    case ai
+}
+
+enum MergeError: LocalizedError {
+    case tooFewConversations
+    case noDefaultModel
+    case noAPIKey
+    case invalidAIResponse(String)
+
+    var errorDescription: String? {
+        switch self {
+        case .tooFewConversations:
+            return "Select at least two conversations to combine."
+        case .noDefaultModel:
+            return "No default model is configured. Set one in Settings → General → Default Model."
+        case .noAPIKey:
+            return "No API key configured for the default provider. Add one in Settings."
+        case .invalidAIResponse(let snippet):
+            return "The model's response could not be parsed into a conversation: \(snippet)"
+        }
+    }
+}
+
+enum ConversationMergeService {
+
+    static func merge(
+        conversationIds: [UUID],
+        name: String,
+        mode: CombineMode,
+        deleteOriginals: Bool
+    ) async throws -> Conversation {
+        guard conversationIds.count >= 2 else {
+            throw MergeError.tooFewConversations
+        }
+
+        let sources: [(Conversation, [Message])] = try conversationIds.compactMap { id in
+            try DatabaseService.shared.loadConversation(id: id)
+        }
+
+        // The model used in the merged conversation should reflect the most recently used
+        // model across the *source* conversations — never the model that performed the merge.
+        let latestModelId = sources
+            .flatMap { $0.1 }
+            .filter { $0.modelId != nil }
+            .max { $0.timestamp < $1.timestamp }?
+            .modelId
+
+        let mergedMessages: [Message]
+        switch mode {
+        case .simple:
+            mergedMessages = simpleMerge(sources)
+        case .ai:
+            mergedMessages = try await aiMerge(sources)
+        }
+
+        let newConversation = try DatabaseService.shared.saveConversation(
+            id: UUID(),
+            name: name,
+            messages: mergedMessages,
+            primaryModel: latestModelId
+        )
+
+        if deleteOriginals {
+            for id in conversationIds {
+                _ = try? DatabaseService.shared.deleteConversation(id: id)
+            }
+        }
+
+        Log.db.info("Combined \(conversationIds.count) conversations into '\(name)' (mode: \(mode.rawValue), deleteOriginals: \(deleteOriginals))")
+
+        return newConversation
+    }
+
+    private static func simpleMerge(_ sources: [(Conversation, [Message])]) -> [Message] {
+        sources.flatMap { $0.1 }.sorted { $0.timestamp < $1.timestamp }
+    }
+
+    private struct MergedTurn: Codable {
+        let role: String
+        let content: String
+    }
+
+    private static func aiMerge(_ sources: [(Conversation, [Message])]) async throws -> [Message] {
+        let settings = SettingsService.shared
+        guard let modelId = settings.defaultModel, !modelId.isEmpty else {
+            throw MergeError.noDefaultModel
+        }
+        guard let provider = ProviderRegistry.shared.getProvider(for: settings.defaultProvider) else {
+            throw MergeError.noAPIKey
+        }
+
+        let transcript = sources.map { conversation, messages -> String in
+            let body = messages.map { msg -> String in
+                let label = msg.role == .user ? "**User:**" : "**Assistant:**"
+                return "\(label) \(msg.content)"
+            }.joined(separator: "\n\n")
+            return "### Conversation: \(conversation.name)\n\n\(body)"
+        }.joined(separator: "\n\n---\n\n")
+
+        let mergePrompt = """
+        Merge the following saved conversation transcripts into a single, coherent conversation. \
+        Remove redundant or duplicate exchanges, keep the most informative answer when sources overlap, \
+        preserve important details from each source, and do not invent facts that were not in the originals.
+
+        Respond with ONLY a JSON array of message objects in logical order, each in the form \
+        {"role": "user" or "assistant", "content": "..."}. Do not include any text outside the JSON array.
+
+        \(transcript)
+        """
+
+        let request = ChatRequest(
+            messages: [Message(role: .user, content: mergePrompt)],
+            model: modelId,
+            stream: false,
+            maxTokens: 4000,
+            temperature: 0.3,
+            topP: nil,
+            systemPrompt: "You are a helpful assistant that merges chat conversation transcripts into one clean, coherent conversation.",
+            tools: nil,
+            onlineMode: false,
+            imageGeneration: false
+        )
+
+        let response: ChatResponse
+        do {
+            response = try await provider.chat(request: request)
+        } catch {
+            Log.api.error("Conversation merge AI call failed: \(error.localizedDescription)")
+            throw error
+        }
+
+        let turns = try parseTurns(from: response.content)
+
+        // modelId intentionally left nil here: these messages are a synthesized composite,
+        // not output from a single source model. The conversation's primaryModel (set by the
+        // caller from the source conversations) is what drives the model shown in the list.
+        let base = Date()
+        return turns.enumerated().map { index, turn in
+            Message(
+                role: turn.role == "user" ? .user : .assistant,
+                content: turn.content,
+                timestamp: base.addingTimeInterval(TimeInterval(index))
+            )
+        }
+    }
+
+    private static func parseTurns(from raw: String) throws -> [MergedTurn] {
+        var text = raw.trimmingCharacters(in: .whitespacesAndNewlines)
+        if text.hasPrefix("```") {
+            text = text.components(separatedBy: "\n").dropFirst().joined(separator: "\n")
+            if text.hasSuffix("```") {
+                text = String(text.dropLast(3))
+            }
+            text = text.trimmingCharacters(in: .whitespacesAndNewlines)
+        }
+        guard let data = text.data(using: .utf8),
+              let turns = try? JSONDecoder().decode([MergedTurn].self, from: data),
+              !turns.isEmpty else {
+            throw MergeError.invalidAIResponse(String(raw.prefix(200)))
+        }
+        return turns
+    }
+}

oAI/Services/EncryptionService.swift

@@ -31,12 +31,11 @@ import IOKit
 class EncryptionService {
     nonisolated static let shared = EncryptionService()
 
-    private let salt = "oAI-secure-storage-v1" // App-specific salt
-    private lazy var encryptionKey: SymmetricKey = {
-        deriveEncryptionKey()
-    }()
+    private let encryptionKey: SymmetricKey
 
-    private init() {}
+    private init() {
+        self.encryptionKey = Self.deriveEncryptionKey()
+    }
 
     // MARK: - Public Interface
 
@@ -73,19 +72,17 @@ class EncryptionService {
     // MARK: - Key Derivation
 
     /// Derive encryption key from machine-specific data
-    private func deriveEncryptionKey() -> SymmetricKey {
-        // Combine machine UUID + bundle ID + salt for key material
+    private static func deriveEncryptionKey() -> SymmetricKey {
         let machineUUID = getMachineUUID()
         let bundleID = Bundle.main.bundleIdentifier ?? "com.oai.oAI"
+        let salt = "oAI-secure-storage-v1"
         let keyMaterial = "\(machineUUID)-\(bundleID)-\(salt)"
-
-        // Hash to create consistent 256-bit key
         let hash = SHA256.hash(data: Data(keyMaterial.utf8))
         return SymmetricKey(data: hash)
     }
 
     /// Get machine-specific UUID (IOPlatformUUID)
-    private func getMachineUUID() -> String {
+    private static func getMachineUUID() -> String {
         // Get IOPlatformUUID from IOKit
         let platformExpert = IOServiceGetMatchingService(
             kIOMainPortDefault,

oAI/Services/EventKitService.swift

@@ -0,0 +1,593 @@
+//
+//  EventKitService.swift
+//  oAI
+//
+//  Calendar and Reminders integration via EventKit
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+//
+// This file is part of oAI.
+//
+// oAI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// oAI is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
+// Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public
+// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
+
+
+import EventKit
+import Foundation
+import os
+
+/// Shared tri-state authorization status for the Settings UI across all Personal Data services.
+/// `.denied` also covers `.restricted` and (for Calendar) `.writeOnly` — states where the OS
+/// will not show a request dialog again; the user must go to System Settings manually.
+enum PersonalDataAccessState {
+    case notDetermined
+    case denied
+    case granted
+}
+
+@Observable
+class EventKitService {
+    static let shared = EventKitService()
+
+    private let store = EKEventStore()
+
+    private init() {}
+
+    // MARK: - Authorization
+
+    var calendarAuthStatus: EKAuthorizationStatus {
+        let status = EKEventStore.authorizationStatus(for: .event)
+        Log.mcp.debug("EventKitService.calendarAuthStatus -> \(Self.describe(status)) (raw=\(status.rawValue))")
+        return status
+    }
+
+    var reminderAuthStatus: EKAuthorizationStatus {
+        let status = EKEventStore.authorizationStatus(for: .reminder)
+        Log.mcp.debug("EventKitService.reminderAuthStatus -> \(Self.describe(status)) (raw=\(status.rawValue))")
+        return status
+    }
+
+    var calendarAuthorized: Bool {
+        calendarAuthStatus == .fullAccess
+    }
+
+    var reminderAuthorized: Bool {
+        reminderAuthStatus == .fullAccess
+    }
+
+    var calendarAccessState: PersonalDataAccessState {
+        switch calendarAuthStatus {
+        case .fullAccess: return .granted
+        case .notDetermined: return .notDetermined
+        default: return .denied  // .denied, .restricted, .writeOnly (no read access for our tools)
+        }
+    }
+
+    var reminderAccessState: PersonalDataAccessState {
+        switch reminderAuthStatus {
+        case .fullAccess: return .granted
+        case .notDetermined: return .notDetermined
+        default: return .denied
+        }
+    }
+
+    @discardableResult
+    func requestCalendarAccess() async -> Bool {
+        let before = EKEventStore.authorizationStatus(for: .event)
+        Log.mcp.info("requestCalendarAccess: status before request = \(Self.describe(before)) (raw=\(before.rawValue))")
+        do {
+            let granted = try await store.requestFullAccessToEvents()
+            let after = EKEventStore.authorizationStatus(for: .event)
+            Log.mcp.info("requestCalendarAccess: API returned granted=\(granted); status after request = \(Self.describe(after)) (raw=\(after.rawValue))")
+            return granted
+        } catch {
+            let after = EKEventStore.authorizationStatus(for: .event)
+            Log.mcp.error("requestCalendarAccess: threw error: \(error.localizedDescription); status after = \(Self.describe(after)) (raw=\(after.rawValue))")
+            return false
+        }
+    }
+
+    @discardableResult
+    func requestReminderAccess() async -> Bool {
+        let before = EKEventStore.authorizationStatus(for: .reminder)
+        Log.mcp.info("requestReminderAccess: status before request = \(Self.describe(before)) (raw=\(before.rawValue))")
+        do {
+            let granted = try await store.requestFullAccessToReminders()
+            let after = EKEventStore.authorizationStatus(for: .reminder)
+            Log.mcp.info("requestReminderAccess: API returned granted=\(granted); status after request = \(Self.describe(after)) (raw=\(after.rawValue))")
+            return granted
+        } catch {
+            let after = EKEventStore.authorizationStatus(for: .reminder)
+            Log.mcp.error("requestReminderAccess: threw error: \(error.localizedDescription); status after = \(Self.describe(after)) (raw=\(after.rawValue))")
+            return false
+        }
+    }
+
+    nonisolated static func describe(_ status: EKAuthorizationStatus) -> String {
+        switch status {
+        case .notDetermined: return "notDetermined"
+        case .restricted: return "restricted"
+        case .denied: return "denied"
+        case .fullAccess: return "fullAccess"
+        case .writeOnly: return "writeOnly"
+        @unknown default: return "unknown"
+        }
+    }
+
+    // MARK: - Tool Schemas
+
+    func getToolSchemas(calendarEnabled: Bool, remindersEnabled: Bool) -> [Tool] {
+        var tools: [Tool] = []
+
+        if calendarEnabled {
+            tools.append(makeTool(
+                name: "calendar_list_calendars",
+                description: "List all calendars available on this Mac (e.g. iCloud, Work, Home).",
+                properties: [:],
+                required: []
+            ))
+            tools.append(makeTool(
+                name: "calendar_list_events",
+                description: "List calendar events within a date range. Dates are ISO8601 (e.g. '2026-06-20T00:00:00' or '2026-06-20'). Range is limited to 1 year. For open-ended queries like 'next appointment' or 'upcoming events', do NOT limit the range to just today — use a generous forward-looking window (e.g. today through +90 days) so you don't miss events further out.",
+                properties: [
+                    "start_date": prop("string", "Start of the date range (ISO8601)"),
+                    "end_date": prop("string", "End of the date range (ISO8601)"),
+                    "calendar_name": prop("string", "Optional: only list events from this calendar")
+                ],
+                required: ["start_date", "end_date"]
+            ))
+            tools.append(makeTool(
+                name: "calendar_create_event",
+                description: "Create a new calendar event. Requires user approval before it is actually created.",
+                properties: [
+                    "title": prop("string", "Event title"),
+                    "start_date": prop("string", "Start date/time (ISO8601, e.g. '2026-06-20T14:00:00')"),
+                    "end_date": prop("string", "End date/time (ISO8601)"),
+                    "calendar_name": prop("string", "Optional: calendar to add the event to (defaults to the system default calendar)"),
+                    "location": prop("string", "Optional: event location text"),
+                    "notes": prop("string", "Optional: event notes"),
+                    "all_day": prop("boolean", "Optional: whether this is an all-day event (default: false)"),
+                    "alarm_minutes_before": prop("number", "Optional: minutes before the start time to show an alert")
+                ],
+                required: ["title", "start_date", "end_date"]
+            ))
+        }
+
+        if remindersEnabled {
+            tools.append(makeTool(
+                name: "reminders_list_lists",
+                description: "List all reminder lists available on this Mac.",
+                properties: [:],
+                required: []
+            ))
+            tools.append(makeTool(
+                name: "reminders_list",
+                description: "List reminders. Omit list_name to search across ALL reminder lists in a single call — prefer this over calling once per list. Incomplete reminders only unless include_completed is true.",
+                properties: [
+                    "list_name": prop("string", "Optional: only list reminders from this one list (omit to search all lists at once)"),
+                    "include_completed": prop("boolean", "Optional: include completed reminders (default: false)")
+                ],
+                required: []
+            ))
+            tools.append(makeTool(
+                name: "reminders_create",
+                description: "Create a new reminder. Requires user approval before it is actually created.",
+                properties: [
+                    "title": prop("string", "Reminder title"),
+                    "list_name": prop("string", "Optional: reminder list to add to (defaults to the system default list)"),
+                    "due_date": prop("string", "Optional: due date/time (ISO8601)"),
+                    "priority": prop("string", "Optional: priority level", enumValues: ["none", "low", "medium", "high"]),
+                    "notes": prop("string", "Optional: reminder notes")
+                ],
+                required: ["title"]
+            ))
+            tools.append(makeTool(
+                name: "reminders_complete",
+                description: "Mark a reminder as completed. Requires user approval. Use reminders_list to find the reminder_id first.",
+                properties: [
+                    "reminder_id": prop("string", "The reminder's identifier, from reminders_list")
+                ],
+                required: ["reminder_id"]
+            ))
+        }
+
+        return tools
+    }
+
+    // MARK: - Read Tool Execution
+
+    func executeTool(name: String, arguments: String) async -> [String: Any] {
+        Log.mcp.info("Executing EventKit tool: \(name)")
+        let args = Self.parseArgs(arguments)
+
+        switch name {
+        case "calendar_list_calendars":
+            guard calendarAuthorized else { return Self.permissionError(domain: "Calendar") }
+            return listCalendars()
+
+        case "calendar_list_events":
+            guard calendarAuthorized else { return Self.permissionError(domain: "Calendar") }
+            guard let startStr = args["start_date"] as? String, let start = Self.parseDate(startStr) else {
+                return ["error": "Missing or invalid parameter: start_date"]
+            }
+            guard let endStr = args["end_date"] as? String, let end = Self.parseDate(endStr) else {
+                return ["error": "Missing or invalid parameter: end_date"]
+            }
+            let calendarName = args["calendar_name"] as? String
+            return listEvents(start: start, end: end, calendarName: calendarName)
+
+        case "reminders_list_lists":
+            guard reminderAuthorized else { return Self.permissionError(domain: "Reminders") }
+            return listReminderLists()
+
+        case "reminders_list":
+            guard reminderAuthorized else { return Self.permissionError(domain: "Reminders") }
+            let listName = args["list_name"] as? String
+            let includeCompleted = args["include_completed"] as? Bool ?? false
+            return await listReminders(listName: listName, includeCompleted: includeCompleted)
+
+        default:
+            return ["error": "Unknown EventKit tool: \(name)"]
+        }
+    }
+
+    // MARK: - Write Tool Execution (called only after approval)
+
+    func executeWriteTool(name: String, arguments: String) async -> [String: Any] {
+        Log.mcp.info("Executing EventKit write tool: \(name)")
+        let args = Self.parseArgs(arguments)
+
+        switch name {
+        case "calendar_create_event":
+            guard calendarAuthorized else { return Self.permissionError(domain: "Calendar") }
+            return createEvent(args: args)
+
+        case "reminders_create":
+            guard reminderAuthorized else { return Self.permissionError(domain: "Reminders") }
+            return createReminder(args: args)
+
+        case "reminders_complete":
+            guard reminderAuthorized else { return Self.permissionError(domain: "Reminders") }
+            guard let reminderId = args["reminder_id"] as? String else {
+                return ["error": "Missing required parameter: reminder_id"]
+            }
+            return completeReminder(reminderId: reminderId)
+
+        default:
+            return ["error": "Unknown EventKit write tool: \(name)"]
+        }
+    }
+
+    // MARK: - Approval Summary
+
+    /// Human-readable description shown in the approval sheet before a write tool runs.
+    func approvalSummary(forTool name: String, arguments: String) -> String {
+        let args = Self.parseArgs(arguments)
+        switch name {
+        case "calendar_create_event":
+            let title = args["title"] as? String ?? "Untitled event"
+            let start = (args["start_date"] as? String).flatMap(Self.parseDate) ?? Date()
+            let end = (args["end_date"] as? String).flatMap(Self.parseDate) ?? start
+            return "Create calendar event \"\(title)\" from \(Self.displayFormatter.string(from: start)) to \(Self.displayFormatter.string(from: end))"
+        case "reminders_create":
+            let title = args["title"] as? String ?? "Untitled reminder"
+            if let dueStr = args["due_date"] as? String, let due = Self.parseDate(dueStr) {
+                return "Create reminder \"\(title)\" due \(Self.displayFormatter.string(from: due))"
+            }
+            return "Create reminder \"\(title)\""
+        case "reminders_complete":
+            return "Mark reminder as completed"
+        default:
+            return "Perform action: \(name)"
+        }
+    }
+
+    // MARK: - Calendar Read Implementations
+
+    private func listCalendars() -> [String: Any] {
+        let calendars = store.calendars(for: .event).map { cal -> [String: Any] in
+            [
+                "name": cal.title,
+                "type": calendarTypeDescription(cal),
+                "allows_modifications": cal.allowsContentModifications
+            ]
+        }
+        return ["calendars": calendars]
+    }
+
+    private func listEvents(start: Date, end: Date, calendarName: String?) -> [String: Any] {
+        guard end > start else { return ["error": "end_date must be after start_date"] }
+        guard end.timeIntervalSince(start) <= 366 * 24 * 60 * 60 else {
+            return ["error": "Date range too large — limit to 1 year or less"]
+        }
+
+        var calendars = store.calendars(for: .event)
+        if let calendarName {
+            calendars = calendars.filter { $0.title.caseInsensitiveCompare(calendarName) == .orderedSame }
+            if calendars.isEmpty {
+                return ["error": "No calendar found named '\(calendarName)'"]
+            }
+        }
+
+        let predicate = store.predicateForEvents(withStart: start, end: end, calendars: calendars)
+        let events = store.events(matching: predicate)
+            .sorted { $0.startDate < $1.startDate }
+            .prefix(200)
+            .map { event -> [String: Any] in
+                var item: [String: Any] = [
+                    "id": event.eventIdentifier ?? "",
+                    "title": event.title ?? "Untitled",
+                    "start": Self.isoFormatter.string(from: event.startDate),
+                    "end": Self.isoFormatter.string(from: event.endDate),
+                    "all_day": event.isAllDay,
+                    "calendar": event.calendar?.title ?? ""
+                ]
+                if let location = event.location, !location.isEmpty {
+                    item["location"] = location
+                }
+                if let notes = event.notes, !notes.isEmpty {
+                    item["notes"] = String(notes.prefix(500))
+                }
+                return item
+            }
+
+        return ["count": events.count, "events": Array(events)]
+    }
+
+    private func createEvent(args: [String: Any]) -> [String: Any] {
+        guard let title = args["title"] as? String, !title.isEmpty else {
+            return ["error": "Missing required parameter: title"]
+        }
+        guard let startStr = args["start_date"] as? String, let start = Self.parseDate(startStr) else {
+            return ["error": "Missing or invalid parameter: start_date"]
+        }
+        guard let endStr = args["end_date"] as? String, let end = Self.parseDate(endStr) else {
+            return ["error": "Missing or invalid parameter: end_date"]
+        }
+        guard end >= start else {
+            return ["error": "end_date must not be before start_date"]
+        }
+
+        let event = EKEvent(eventStore: store)
+        event.title = title
+        event.startDate = start
+        event.endDate = end
+        event.isAllDay = args["all_day"] as? Bool ?? false
+
+        if let calendarName = args["calendar_name"] as? String,
+           let calendar = store.calendars(for: .event).first(where: { $0.title.caseInsensitiveCompare(calendarName) == .orderedSame }) {
+            event.calendar = calendar
+        } else if let defaultCalendar = store.defaultCalendarForNewEvents {
+            event.calendar = defaultCalendar
+        } else {
+            guard let fallback = store.calendars(for: .event).first(where: { $0.allowsContentModifications }) else {
+                return ["error": "No writable calendar available"]
+            }
+            event.calendar = fallback
+        }
+
+        if let location = args["location"] as? String { event.location = location }
+        if let notes = args["notes"] as? String { event.notes = notes }
+        if let minutesBefore = (args["alarm_minutes_before"] as? Double) ?? (args["alarm_minutes_before"] as? Int).map(Double.init) {
+            event.addAlarm(EKAlarm(relativeOffset: -(minutesBefore * 60)))
+        }
+
+        do {
+            try store.save(event, span: .thisEvent, commit: true)
+            return ["success": true, "event_id": event.eventIdentifier ?? "", "calendar": event.calendar?.title ?? ""]
+        } catch {
+            Log.mcp.error("calendar_create_event failed: \(error.localizedDescription)")
+            return ["error": "Failed to create event: \(error.localizedDescription)"]
+        }
+    }
+
+    // MARK: - Reminders Read Implementations
+
+    private func listReminderLists() -> [String: Any] {
+        let lists = store.calendars(for: .reminder).map { cal -> [String: Any] in
+            ["name": cal.title, "allows_modifications": cal.allowsContentModifications]
+        }
+        return ["lists": lists]
+    }
+
+    private func listReminders(listName: String?, includeCompleted: Bool) async -> [String: Any] {
+        var lists = store.calendars(for: .reminder)
+        if let listName {
+            lists = lists.filter { $0.title.caseInsensitiveCompare(listName) == .orderedSame }
+            if lists.isEmpty {
+                return ["error": "No reminder list found named '\(listName)'"]
+            }
+        }
+
+        let predicate = store.predicateForReminders(in: lists)
+        let reminders: [EKReminder] = await withCheckedContinuation { continuation in
+            store.fetchReminders(matching: predicate) { results in
+                continuation.resume(returning: results ?? [])
+            }
+        }
+
+        let filtered = reminders
+            .filter { includeCompleted || !$0.isCompleted }
+            .sorted { lhs, rhs in
+                let l = lhs.dueDateComponents?.date ?? .distantFuture
+                let r = rhs.dueDateComponents?.date ?? .distantFuture
+                return l < r
+            }
+            .prefix(200)
+            .map { reminder -> [String: Any] in
+                var item: [String: Any] = [
+                    "id": reminder.calendarItemIdentifier,
+                    "title": reminder.title ?? "Untitled",
+                    "completed": reminder.isCompleted,
+                    "list": reminder.calendar?.title ?? ""
+                ]
+                if let due = reminder.dueDateComponents?.date {
+                    item["due"] = Self.isoFormatter.string(from: due)
+                }
+                if reminder.priority > 0 {
+                    item["priority"] = priorityDescription(reminder.priority)
+                }
+                if let notes = reminder.notes, !notes.isEmpty {
+                    item["notes"] = String(notes.prefix(500))
+                }
+                return item
+            }
+
+        return ["count": filtered.count, "reminders": Array(filtered)]
+    }
+
+    private func createReminder(args: [String: Any]) -> [String: Any] {
+        guard let title = args["title"] as? String, !title.isEmpty else {
+            return ["error": "Missing required parameter: title"]
+        }
+
+        let reminder = EKReminder(eventStore: store)
+        reminder.title = title
+
+        if let listName = args["list_name"] as? String,
+           let list = store.calendars(for: .reminder).first(where: { $0.title.caseInsensitiveCompare(listName) == .orderedSame }) {
+            reminder.calendar = list
+        } else if let defaultList = store.defaultCalendarForNewReminders() {
+            reminder.calendar = defaultList
+        } else {
+            guard let fallback = store.calendars(for: .reminder).first(where: { $0.allowsContentModifications }) else {
+                return ["error": "No writable reminder list available"]
+            }
+            reminder.calendar = fallback
+        }
+
+        if let dueStr = args["due_date"] as? String, let due = Self.parseDate(dueStr) {
+            reminder.dueDateComponents = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second], from: due)
+        }
+        if let notes = args["notes"] as? String { reminder.notes = notes }
+        if let priority = args["priority"] as? String { reminder.priority = priorityValue(priority) }
+
+        do {
+            try store.save(reminder, commit: true)
+            return ["success": true, "reminder_id": reminder.calendarItemIdentifier, "list": reminder.calendar?.title ?? ""]
+        } catch {
+            Log.mcp.error("reminders_create failed: \(error.localizedDescription)")
+            return ["error": "Failed to create reminder: \(error.localizedDescription)"]
+        }
+    }
+
+    private func completeReminder(reminderId: String) -> [String: Any] {
+        guard let item = store.calendarItem(withIdentifier: reminderId) as? EKReminder else {
+            return ["error": "No reminder found with id '\(reminderId)'"]
+        }
+        item.isCompleted = true
+        item.completionDate = Date()
+
+        do {
+            try store.save(item, commit: true)
+            return ["success": true, "reminder_id": reminderId, "title": item.title ?? ""]
+        } catch {
+            Log.mcp.error("reminders_complete failed: \(error.localizedDescription)")
+            return ["error": "Failed to complete reminder: \(error.localizedDescription)"]
+        }
+    }
+
+    // MARK: - Helpers
+
+    private func calendarTypeDescription(_ cal: EKCalendar) -> String {
+        switch cal.type {
+        case .local: return "local"
+        case .calDAV: return "caldav"
+        case .exchange: return "exchange"
+        case .subscription: return "subscription"
+        case .birthday: return "birthday"
+        @unknown default: return "unknown"
+        }
+    }
+
+    private func priorityDescription(_ value: Int) -> String {
+        switch value {
+        case 1...4: return "high"
+        case 5: return "medium"
+        case 6...9: return "low"
+        default: return "none"
+        }
+    }
+
+    private func priorityValue(_ description: String) -> Int {
+        switch description.lowercased() {
+        case "high": return 1
+        case "medium": return 5
+        case "low": return 9
+        default: return 0
+        }
+    }
+
+    private func makeTool(name: String, description: String, properties: [String: Tool.Function.Parameters.Property], required: [String]) -> Tool {
+        Tool(
+            type: "function",
+            function: Tool.Function(
+                name: name,
+                description: description,
+                parameters: Tool.Function.Parameters(
+                    type: "object",
+                    properties: properties,
+                    required: required
+                )
+            )
+        )
+    }
+
+    private func prop(_ type: String, _ description: String, enumValues: [String]? = nil) -> Tool.Function.Parameters.Property {
+        Tool.Function.Parameters.Property(type: type, description: description, enum: enumValues)
+    }
+
+    nonisolated static func parseArgs(_ arguments: String) -> [String: Any] {
+        guard let data = arguments.data(using: .utf8),
+              let dict = try? JSONSerialization.jsonObject(with: data) as? [String: Any] else {
+            return [:]
+        }
+        return dict
+    }
+
+    nonisolated static func permissionError(domain: String) -> [String: Any] {
+        ["error": "\(domain) permission not granted. Grant access in Settings > MCP."]
+    }
+
+    nonisolated(unsafe) static let isoFormatter: ISO8601DateFormatter = {
+        let f = ISO8601DateFormatter()
+        f.formatOptions = [.withInternetDateTime]
+        return f
+    }()
+
+    nonisolated static let displayFormatter: DateFormatter = {
+        let f = DateFormatter()
+        f.dateStyle = .medium
+        f.timeStyle = .short
+        return f
+    }()
+
+    nonisolated static func parseDate(_ string: String) -> Date? {
+        if let date = isoFormatter.date(from: string) { return date }
+
+        let isoNoTimezone = ISO8601DateFormatter()
+        isoNoTimezone.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
+        if let date = isoNoTimezone.date(from: string) { return date }
+
+        let localDateTime = DateFormatter()
+        localDateTime.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
+        if let date = localDateTime.date(from: string) { return date }
+
+        let dateOnly = DateFormatter()
+        dateOnly.dateFormat = "yyyy-MM-dd"
+        if let date = dateOnly.date(from: string) { return date }
+
+        return nil
+    }
+}

oAI/Services/ExternalMCPClient.swift

@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+
+import Foundation
+
+// MARK: - ExternalMCPClient
+
+/// Manages one MCP stdio server process. All state is MainActor-isolated
+/// (consistent with SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor project setting).
+/// Background I/O runs in Task.detached; state mutations hop back to MainActor.
+@MainActor
+final class ExternalMCPClient {
+    let server: ExternalMCPServer
+    weak var stateDelegate: (any ExternalMCPStateDelegate)?
+
+    private var process: Process?
+    private var stdinHandle: FileHandle?
+    private var readTask: Task<Void, Never>?
+    private var stderrTask: Task<Void, Never>?
+
+    private var nextRequestId: Int = 1
+    private var pendingCalls: [Int: CheckedContinuation<Data, Error>] = [:]
+    private var lineBuffer = Data()
+
+    private(set) var state: MCPClientState = .idle
+    private(set) var discoveredTools: [MCPToolDefinition] = []
+
+    init(server: ExternalMCPServer, stateDelegate: (any ExternalMCPStateDelegate)?) {
+        self.server = server
+        self.stateDelegate = stateDelegate
+    }
+
+    // MARK: - Lifecycle
+
+    func start() async throws {
+        guard state == .idle || state == .stopped || state == .crashed else { return }
+        state = .connecting
+        stateDelegate?.clientDidChangeState(id: server.id, state: .connecting)
+
+        let proc = Process()
+        if server.command.hasPrefix("/") {
+            proc.executableURL = URL(fileURLWithPath: server.command)
+            proc.arguments = server.args
+        } else {
+            proc.executableURL = URL(fileURLWithPath: "/usr/bin/env")
+            proc.arguments = [server.command] + server.args
+        }
+        proc.environment = ProcessInfo.processInfo.environment
+
+        let stdinPipe = Pipe()
+        let stdoutPipe = Pipe()
+        let stderrPipe = Pipe()
+        proc.standardInput = stdinPipe
+        proc.standardOutput = stdoutPipe
+        proc.standardError = stderrPipe
+
+        proc.terminationHandler = { [weak self] _ in
+            Task { @MainActor [weak self] in self?.handleProcessTerminated() }
+        }
+
+        do {
+            try proc.run()
+        } catch {
+            state = .error(error.localizedDescription)
+            stateDelegate?.clientDidChangeState(id: server.id, state: .error(error.localizedDescription))
+            throw MCPClientError.processLaunchFailed(error.localizedDescription)
+        }
+
+        process = proc
+        stdinHandle = stdinPipe.fileHandleForWriting
+        startReadLoop(pipe: stdoutPipe)
+        startStderrLoop(pipe: stderrPipe)
+
+        do {
+            let _: MCPInitializeResult = try await timedRequest(seconds: 15, method: "initialize", params: [
+                "protocolVersion": "2024-11-05",
+                "capabilities": [:] as [String: Any],
+                "clientInfo": ["name": "oAI", "version": "1.0"] as [String: Any]
+            ])
+            try sendNotification(method: "notifications/initialized")
+
+            let toolsResult: MCPToolsListResult = try await timedRequest(seconds: 15, method: "tools/list", params: nil)
+            discoveredTools = toolsResult.tools
+        } catch {
+            state = .error(error.localizedDescription)
+            stateDelegate?.clientDidChangeState(id: server.id, state: .error(error.localizedDescription))
+            proc.terminate()
+            throw error
+        }
+
+        state = .ready
+        stateDelegate?.clientDidBecomeReady(id: server.id, tools: discoveredTools, server: server)
+    }
+
+    func stop() {
+        state = .stopped
+        readTask?.cancel()
+        stderrTask?.cancel()
+        process?.terminate()
+        process = nil
+        stdinHandle = nil
+        lineBuffer = Data()
+        for (_, cont) in pendingCalls { cont.resume(throwing: MCPClientError.notConnected) }
+        pendingCalls.removeAll()
+    }
+
+    // MARK: - Tool Execution
+
+    func callTool(originalName: String, argumentsJSON: String) async -> [String: Any] {
+        guard state == .ready else {
+            return ["error": "MCP server '\(server.name)' is not connected"]
+        }
+        guard let argData = argumentsJSON.data(using: .utf8),
+              let argsDict = try? JSONSerialization.jsonObject(with: argData) as? [String: Any] else {
+            return ["error": "Invalid arguments JSON for tool \(originalName)"]
+        }
+        do {
+            let result: MCPToolCallResult = try await timedRequest(
+                seconds: server.timeout,
+                method: "tools/call",
+                params: ["name": originalName, "arguments": argsDict]
+            )
+            return convertMCPResult(result)
+        } catch MCPClientError.timeout {
+            return ["error": "MCP server '\(server.name)' timed out after \(Int(server.timeout))s"]
+        } catch {
+            return ["error": "MCP call '\(originalName)' failed: \(error.localizedDescription)"]
+        }
+    }
+
+    // MARK: - I/O Loops (detached from MainActor)
+
+    private func startReadLoop(pipe: Pipe) {
+        readTask = Task.detached { [weak self] in
+            let handle = pipe.fileHandleForReading
+            while true {
+                let data = handle.availableData
+                if data.isEmpty { break }
+                await self?.receiveData(data)
+            }
+        }
+    }
+
+    private func startStderrLoop(pipe: Pipe) {
+        let name = server.name
+        stderrTask = Task.detached {
+            let handle = pipe.fileHandleForReading
+            var buf = Data()
+            while true {
+                let data = handle.availableData
+                if data.isEmpty { break }
+                buf.append(data)
+                while let idx = buf.firstIndex(of: UInt8(ascii: "\n")) {
+                    let line = String(data: buf[buf.startIndex..<idx], encoding: .utf8) ?? ""
+                    buf = Data(buf[buf.index(after: idx)...])
+                    if !line.trimmingCharacters(in: .whitespaces).isEmpty {
+                        Log.extMcp.warning("[\(name)] \(line)")
+                    }
+                }
+            }
+        }
+    }
+
+    // MARK: - Data Processing (MainActor)
+
+    private func receiveData(_ data: Data) {
+        lineBuffer.append(data)
+        while let idx = lineBuffer.firstIndex(of: UInt8(ascii: "\n")) {
+            let lineData = Data(lineBuffer[lineBuffer.startIndex..<idx])
+            lineBuffer = Data(lineBuffer[lineBuffer.index(after: idx)...])
+            processLine(lineData)
+        }
+    }
+
+    private func processLine(_ data: Data) {
+        guard !data.isEmpty,
+              let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+              let id = json["id"] as? Int,
+              let cont = pendingCalls.removeValue(forKey: id) else { return }
+
+        if let err = json["error"] as? [String: Any] {
+            cont.resume(throwing: MCPClientError.invalidResponse(err["message"] as? String ?? "Unknown error"))
+        } else if let result = json["result"],
+                  let resultData = try? JSONSerialization.data(withJSONObject: result) {
+            cont.resume(returning: resultData)
+        } else {
+            cont.resume(throwing: MCPClientError.invalidResponse("Missing result field"))
+        }
+    }
+
+    // MARK: - JSON-RPC
+
+    /// Send a JSON-RPC request with a per-call timeout. The timeout fires a cancellation
+    /// directly into the pending-calls table rather than using a task group (which would
+    /// pass the generic T through a @Sendable closure and trigger an isolated-conformance warning).
+    private func timedRequest<T: Decodable>(seconds: Double, method: String, params: [String: Any]?) async throws -> T {
+        let id = nextRequestId
+        nextRequestId += 1
+        var message: [String: Any] = ["jsonrpc": "2.0", "method": method, "id": id]
+        if let params { message["params"] = params }
+        try writeJSON(message)
+
+        // Schedule timeout: cancels the specific pending call by ID
+        let timeoutId = id
+        Task { [weak self, timeoutId] in
+            try? await Task.sleep(nanoseconds: UInt64(seconds * 1_000_000_000))
+            self?.cancelPendingCall(id: timeoutId, with: MCPClientError.timeout)
+        }
+
+        // Await response data, then decode on MainActor
+        let resultData: Data = try await withCheckedThrowingContinuation { cont in
+            pendingCalls[id] = cont
+        }
+        return try JSONDecoder().decode(T.self, from: resultData)
+    }
+
+    private func cancelPendingCall(id: Int, with error: Error) {
+        pendingCalls.removeValue(forKey: id)?.resume(throwing: error)
+    }
+
+    private func sendNotification(method: String) throws {
+        try writeJSON(["jsonrpc": "2.0", "method": method])
+    }
+
+    private func writeJSON(_ message: [String: Any]) throws {
+        guard let handle = stdinHandle, process?.isRunning == true else {
+            throw MCPClientError.writeFailed
+        }
+        guard let data = try? JSONSerialization.data(withJSONObject: message),
+              let line = String(data: data, encoding: .utf8) else {
+            throw MCPClientError.writeFailed
+        }
+        do {
+            try handle.write(contentsOf: Data((line + "\n").utf8))
+        } catch {
+            throw MCPClientError.writeFailed
+        }
+    }
+
+    // MARK: - Process termination
+
+    private func handleProcessTerminated() {
+        guard state != .stopped else { return }
+        state = .crashed
+        for (_, cont) in pendingCalls { cont.resume(throwing: MCPClientError.notConnected) }
+        pendingCalls.removeAll()
+        stateDelegate?.clientDidChangeState(id: server.id, state: .crashed)
+    }
+
+    // MARK: - Result conversion
+
+    private func convertMCPResult(_ result: MCPToolCallResult) -> [String: Any] {
+        let isError = result.isError ?? false
+        var parts: [String] = []
+        for content in result.content {
+            switch content.type {
+            case "text":
+                if let text = content.text { parts.append(text) }
+            case "image":
+                if let base64 = content.data, let imageData = Data(base64Encoded: base64) {
+                    parts.append("[Image saved to: \(writeTempImage(imageData, mimeType: content.mimeType))]")
+                }
+            case "resource":
+                if let text = content.text { parts.append(text) }
+                else if let uri = content.uri { parts.append("[Resource: \(uri)]") }
+            default:
+                if let text = content.text { parts.append(text) }
+            }
+        }
+        let combined = parts.joined(separator: "\n")
+        return isError ? ["error": combined.isEmpty ? "Tool returned an error" : combined] : ["output": combined]
+    }
+
+    private func writeTempImage(_ data: Data, mimeType: String?) -> String {
+        let ext = mimeType?.contains("png") == true ? "png" : "jpg"
+        let path = "/tmp/oai_mcp_\(Int(Date().timeIntervalSince1970 * 1000)).\(ext)"
+        try? data.write(to: URL(fileURLWithPath: path))
+        return path
+    }
+}

oAI/Services/ExternalMCPManager.swift

@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+
+import Foundation
+
+// MARK: - ExternalMCPManager
+
+@Observable
+@MainActor
+final class ExternalMCPManager {
+    nonisolated static let shared = ExternalMCPManager()
+
+    private(set) var clientStates: [UUID: MCPClientState] = [:]
+    private(set) var cachedToolSchemas: [Tool] = []
+
+    // Keep server config alongside client so we can access slug without await
+    private var clients: [UUID: ExternalMCPClient] = [:]
+    private var serverConfigs: [UUID: ExternalMCPServer] = [:]
+    private var restartTasks: [UUID: Task<Void, Never>] = [:]
+    private var restartAttempts: [UUID: Int] = [:]
+
+    private nonisolated init() {}
+
+    // MARK: - Lifecycle
+
+    func startAll() {
+        for server in SettingsService.shared.externalMCPServers where server.isEnabled {
+            startClient(for: server)
+        }
+    }
+
+    func stopAll() {
+        for client in clients.values { client.stop() }
+        clients.removeAll()
+        serverConfigs.removeAll()
+        clientStates.removeAll()
+        cachedToolSchemas.removeAll()
+        for task in restartTasks.values { task.cancel() }
+        restartTasks.removeAll()
+        restartAttempts.removeAll()
+    }
+
+    func reconfigure(servers: [ExternalMCPServer]) {
+        let activeIds = Set(servers.filter { $0.isEnabled }.map { $0.id })
+        for id in clients.keys where !activeIds.contains(id) {
+            clients[id]?.stop()
+            clients.removeValue(forKey: id)
+            serverConfigs.removeValue(forKey: id)
+            clientStates.removeValue(forKey: id)
+            restartTasks[id]?.cancel()
+            restartTasks.removeValue(forKey: id)
+            restartAttempts.removeValue(forKey: id)
+            removeCachedSchemas(for: id)
+        }
+        for server in servers where server.isEnabled && clients[server.id] == nil {
+            startClient(for: server)
+        }
+    }
+
+    private func startClient(for server: ExternalMCPServer) {
+        // Stop any existing client for this ID before creating a new one
+        clients[server.id]?.stop()
+        let client = ExternalMCPClient(server: server, stateDelegate: self)
+        clients[server.id] = client
+        serverConfigs[server.id] = server
+        clientStates[server.id] = .connecting
+        Task {
+            do {
+                try await client.start()
+            } catch MCPClientError.processLaunchFailed(let msg) {
+                // Process never started — termination handler won't fire, so manually trigger crashed
+                Log.extMcp.error("Failed to launch '\(server.name)': \(msg)")
+                clientDidChangeState(id: server.id, state: .crashed)
+            } catch {
+                // Handshake/other failure — proc.terminate() was called in start(), termination
+                // handler will fire and set .crashed, which drives the restart from one place only.
+                Log.extMcp.warning("'\(server.name)' start failed: \(error.localizedDescription)")
+            }
+        }
+    }
+
+    private func scheduleRestart(for server: ExternalMCPServer, attempt: Int) {
+        let delays: [Double] = [5, 15, 30]
+        let delay = delays[min(attempt - 1, delays.count - 1)]
+        Log.extMcp.warning("MCP server '\(server.name)' crashed — restarting in \(Int(delay))s (attempt \(attempt)/3)")
+
+        restartTasks[server.id]?.cancel()
+        let id = server.id
+        restartTasks[id] = Task { [weak self, id] in
+            try? await Task.sleep(nanoseconds: UInt64(delay * 1_000_000_000))
+            guard !Task.isCancelled, let self,
+                  self.clients[id] != nil,
+                  SettingsService.shared.externalMCPServers.contains(where: { $0.id == id && $0.isEnabled })
+            else { return }
+            // startClient is the single place that creates and launches clients.
+            // It handles processLaunchFailed by calling clientDidChangeState(.crashed),
+            // and all other failures let the termination handler drive the .crashed callback.
+            self.startClient(for: server)
+        }
+    }
+
+    // MARK: - Tool Schema Integration (synchronous)
+
+    func getToolSchemas() -> [Tool] { cachedToolSchemas }
+
+    func isExternalTool(_ name: String) -> Bool {
+        cachedToolSchemas.contains { $0.function.name == name }
+    }
+
+    // MARK: - Tool Execution
+
+    func executeTool(name: String, argumentsJSON: String) async -> [String: Any] {
+        for (id, client) in clients {
+            guard clientStates[id] == .ready,
+                  let server = serverConfigs[id] else { continue }
+            let prefix = "\(server.slug)_"
+            if name.hasPrefix(prefix) {
+                let originalName = String(name.dropFirst(prefix.count))
+                return await client.callTool(originalName: originalName, argumentsJSON: argumentsJSON)
+            }
+        }
+        return ["error": "No external MCP server found for tool: \(name)"]
+    }
+
+    // MARK: - Schema Cache
+
+    private func rebuildCache(for server: ExternalMCPServer, tools: [MCPToolDefinition]) {
+        removeCachedSchemas(for: server.id, slug: server.slug)
+        let prefixed = tools.compactMap { convertToolDefinition($0, server: server) }
+        cachedToolSchemas.append(contentsOf: prefixed)
+        Log.extMcp.info("[\(server.name)] cached \(prefixed.count) tools: \(prefixed.map { $0.function.name }.joined(separator: ", "))")
+    }
+
+    private func removeCachedSchemas(for id: UUID) {
+        guard let server = serverConfigs[id] else { return }
+        removeCachedSchemas(for: id, slug: server.slug)
+    }
+
+    private func removeCachedSchemas(for id: UUID, slug: String) {
+        cachedToolSchemas.removeAll { $0.function.name.hasPrefix("\(slug)_") }
+    }
+
+    private func convertToolDefinition(_ def: MCPToolDefinition, server: ExternalMCPServer) -> Tool? {
+        Tool(
+            type: "function",
+            function: Tool.Function(
+                name: "\(server.slug)_\(def.name)",
+                description: "[\(server.name)] \(def.description ?? "")",
+                parameters: convertInputSchema(def.inputSchema)
+            )
+        )
+    }
+
+    private func convertInputSchema(_ schema: MCPInputSchema) -> Tool.Function.Parameters {
+        var properties: [String: Tool.Function.Parameters.Property] = [:]
+        for (key, prop) in schema.properties ?? [:] {
+            let normalized: String
+            switch prop.type ?? "string" {
+            case "integer":                                        normalized = "number"
+            case "string", "number", "boolean", "array", "object": normalized = prop.type!
+            default:                                               normalized = "string"
+            }
+            var items: Tool.Function.Parameters.Property.Items? = nil
+            if normalized == "array", let t = prop.items?.type { items = .init(type: t) }
+            properties[key] = Tool.Function.Parameters.Property(
+                type: normalized,
+                description: prop.description ?? "",
+                enum: prop.enum,
+                items: items
+            )
+        }
+        return Tool.Function.Parameters(type: "object", properties: properties, required: schema.required)
+    }
+}
+
+// MARK: - ExternalMCPStateDelegate
+
+extension ExternalMCPManager: ExternalMCPStateDelegate {
+    func clientDidBecomeReady(id: UUID, tools: [MCPToolDefinition], server: ExternalMCPServer) {
+        clientStates[id] = .ready
+        restartAttempts.removeValue(forKey: id)
+        rebuildCache(for: server, tools: tools)
+    }
+
+    func clientDidChangeState(id: UUID, state: MCPClientState) {
+        clientStates[id] = state
+        if case .crashed = state,
+           let server = serverConfigs[id],
+           SettingsService.shared.externalMCPServers.contains(where: { $0.id == id && $0.isEnabled }) {
+            removeCachedSchemas(for: id, slug: server.slug)
+            let attempt = (restartAttempts[id] ?? 0) + 1
+            guard attempt <= 3 else {
+                Log.extMcp.error("MCP server '\(server.name)' gave up after 3 restart attempts")
+                clientStates[id] = .error("Maximum restart attempts reached")
+                restartAttempts.removeValue(forKey: id)
+                return
+            }
+            restartAttempts[id] = attempt
+            scheduleRestart(for: server, attempt: attempt)
+        }
+    }
+}

oAI/Services/ExternalMCPModels.swift

@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+
+import Foundation
+
+// MARK: - Server Configuration
+
+struct ExternalMCPServer: Codable, Identifiable, Sendable {
+    var id: UUID
+    var name: String
+    var command: String
+    var args: [String]
+    var isEnabled: Bool
+    var timeout: TimeInterval
+    var createdAt: Date
+
+    init(id: UUID = UUID(), name: String, command: String, args: [String] = [],
+         isEnabled: Bool = true, timeout: TimeInterval = 30, createdAt: Date = Date()) {
+        self.id = id
+        self.name = name
+        self.command = command
+        self.args = args
+        self.isEnabled = isEnabled
+        self.timeout = timeout
+        self.createdAt = createdAt
+    }
+
+    var slug: String { Self.makeSlug(from: name) }
+
+    static func makeSlug(from name: String) -> String {
+        let s = name
+            .lowercased()
+            .components(separatedBy: CharacterSet.alphanumerics.inverted)
+            .filter { !$0.isEmpty }
+            .joined(separator: "_")
+        return s.isEmpty ? "ext" : s
+    }
+
+    /// Splits a raw arguments string into tokens, respecting single/double-quoted
+    /// segments so arguments containing spaces (e.g. `--root "/Users/x/My Documents"`)
+    /// survive intact instead of being split on every space.
+    static func parseArguments(_ input: String) -> [String] {
+        var args: [String] = []
+        var current = ""
+        var inSingleQuotes = false
+        var inDoubleQuotes = false
+
+        for char in input {
+            if char == "'" && !inDoubleQuotes {
+                inSingleQuotes.toggle()
+            } else if char == "\"" && !inSingleQuotes {
+                inDoubleQuotes.toggle()
+            } else if char.isWhitespace && !inSingleQuotes && !inDoubleQuotes {
+                if !current.isEmpty {
+                    args.append(current)
+                    current = ""
+                }
+            } else {
+                current.append(char)
+            }
+        }
+        if !current.isEmpty { args.append(current) }
+        return args
+    }
+
+    static let reservedSlugs: Set<String> = [
+        "anytype", "paperless", "calendar", "reminders",
+        "contacts", "location", "maps", "bash", "web", "read", "write",
+        "list", "search", "edit", "delete", "create", "move", "copy", "spawn"
+    ]
+
+    var isSlugReserved: Bool { Self.reservedSlugs.contains(slug) }
+}
+
+// MARK: - Client State
+
+enum MCPClientState: Equatable {
+    case idle
+    case connecting
+    case ready
+    case error(String)
+    case crashed
+    case stopped
+}
+
+// MARK: - State Delegate (all callbacks on MainActor)
+
+@MainActor
+protocol ExternalMCPStateDelegate: AnyObject {
+    func clientDidBecomeReady(id: UUID, tools: [MCPToolDefinition], server: ExternalMCPServer)
+    func clientDidChangeState(id: UUID, state: MCPClientState)
+}
+
+// MARK: - Client Errors
+
+enum MCPClientError: LocalizedError {
+    case notConnected
+    case invalidResponse(String)
+    case timeout
+    case processLaunchFailed(String)
+    case handshakeFailed(String)
+    case writeFailed
+
+    var errorDescription: String? {
+        switch self {
+        case .notConnected:               return "MCP server is not connected"
+        case .invalidResponse(let s):     return "Invalid MCP response: \(s)"
+        case .timeout:                    return "MCP request timed out"
+        case .processLaunchFailed(let s): return "Failed to launch MCP server: \(s)"
+        case .handshakeFailed(let s):     return "MCP handshake failed: \(s)"
+        case .writeFailed:                return "Failed to write to MCP server stdin"
+        }
+    }
+}
+
+// MARK: - MCP Protocol Types
+
+struct MCPInitializeResult: Decodable {
+    let protocolVersion: String
+    let capabilities: MCPCapabilities
+    let serverInfo: MCPServerInfo?
+}
+
+struct MCPCapabilities: Decodable {
+    let tools: MCPToolsCapability?
+    struct MCPToolsCapability: Decodable { let listChanged: Bool? }
+}
+
+struct MCPServerInfo: Decodable {
+    let name: String
+    let version: String?
+}
+
+struct MCPToolsListResult: Decodable {
+    let tools: [MCPToolDefinition]
+    let nextCursor: String?
+}
+
+struct MCPToolDefinition: Decodable {
+    let name: String
+    let description: String?
+    let inputSchema: MCPInputSchema
+}
+
+struct MCPInputSchema: Decodable {
+    let type: String
+    let properties: [String: MCPPropertySchema]?
+    let required: [String]?
+}
+
+struct MCPPropertySchema: Decodable {
+    let type: String?
+    let description: String?
+    let `enum`: [String]?
+    let items: MCPItemsSchema?
+    struct MCPItemsSchema: Decodable { let type: String? }
+}
+
+struct MCPToolCallResult: Decodable {
+    let content: [MCPContent]
+    let isError: Bool?
+}
+
+struct MCPContent: Decodable {
+    let type: String
+    let text: String?
+    let data: String?
+    let mimeType: String?
+    let uri: String?
+}

oAI/Services/LocationMapsService.swift

@@ -0,0 +1,343 @@
+//
+//  LocationMapsService.swift
+//  oAI
+//
+//  Read-only Location and Maps integration via CoreLocation and MapKit
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+//
+// This file is part of oAI.
+//
+// oAI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// oAI is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
+// Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public
+// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
+
+
+import CoreLocation
+import Foundation
+import MapKit
+import os
+
+@Observable
+class LocationMapsService: NSObject, CLLocationManagerDelegate {
+    static let shared = LocationMapsService()
+
+    private let locationManager = CLLocationManager()
+
+    private var authContinuation: CheckedContinuation<Bool, Never>?
+    private var locationContinuation: CheckedContinuation<CLLocation?, Never>?
+
+    private override init() {
+        super.init()
+        locationManager.delegate = self
+    }
+
+    // MARK: - Authorization
+
+    var authStatus: CLAuthorizationStatus {
+        locationManager.authorizationStatus
+    }
+
+    var authorized: Bool {
+        authStatus == .authorizedAlways || authStatus == .authorized
+    }
+
+    var accessState: PersonalDataAccessState {
+        let status = authStatus
+        Log.mcp.debug("LocationMapsService.accessState -> status=\(Self.describe(status)) (raw=\(status.rawValue))")
+        switch status {
+        case .authorizedAlways, .authorized: return .granted
+        case .notDetermined: return .notDetermined
+        default: return .denied
+        }
+    }
+
+    @discardableResult
+    func requestAccess() async -> Bool {
+        let before = locationManager.authorizationStatus
+        Log.mcp.info("LocationMapsService.requestAccess: status before = \(Self.describe(before)) (raw=\(before.rawValue))")
+        if before != .notDetermined {
+            Log.mcp.info("LocationMapsService.requestAccess: skipping OS prompt (not notDetermined)")
+            return authorized
+        }
+        return await withCheckedContinuation { continuation in
+            self.authContinuation = continuation
+            locationManager.requestWhenInUseAuthorization()
+        }
+    }
+
+    func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
+        let status = manager.authorizationStatus
+        Log.mcp.info("LocationMapsService: authorization changed -> \(Self.describe(status)) (raw=\(status.rawValue))")
+        authContinuation?.resume(returning: authorized)
+        authContinuation = nil
+    }
+
+    nonisolated static func describe(_ status: CLAuthorizationStatus) -> String {
+        switch status {
+        case .notDetermined: return "notDetermined"
+        case .restricted: return "restricted"
+        case .denied: return "denied"
+        case .authorizedAlways: return "authorizedAlways"
+        case .authorized: return "authorized"
+        @unknown default: return "unknown"
+        }
+    }
+
+    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
+        locationContinuation?.resume(returning: locations.last)
+        locationContinuation = nil
+    }
+
+    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
+        Log.mcp.error("Location request failed: \(error.localizedDescription)")
+        locationContinuation?.resume(returning: nil)
+        locationContinuation = nil
+    }
+
+    private func currentLocation() async -> CLLocation? {
+        await withCheckedContinuation { continuation in
+            self.locationContinuation = continuation
+            locationManager.requestLocation()
+        }
+    }
+
+    // MARK: - Tool Schemas
+
+    func getToolSchemas() -> [Tool] {
+        [
+            makeTool(
+                name: "location_get_current",
+                description: "Get the device's current location, including a human-readable address.",
+                properties: [:],
+                required: []
+            ),
+            makeTool(
+                name: "maps_search_places",
+                description: "Search for places (businesses, landmarks, addresses) by name or category.",
+                properties: [
+                    "query": prop("string", "What to search for, e.g. 'coffee shops' or 'Eiffel Tower'"),
+                    "near": prop("string", "Optional: an address or 'latitude,longitude' to search near")
+                ],
+                required: ["query"]
+            ),
+            makeTool(
+                name: "maps_geocode",
+                description: "Convert an address into geographic coordinates and a formatted address.",
+                properties: [
+                    "address": prop("string", "The address to geocode")
+                ],
+                required: ["address"]
+            ),
+            makeTool(
+                name: "maps_get_directions",
+                description: "Get distance and estimated travel time between two locations.",
+                properties: [
+                    "origin": prop("string", "Starting address or 'latitude,longitude'"),
+                    "destination": prop("string", "Destination address or 'latitude,longitude'"),
+                    "transport_type": prop("string", "Mode of transport", enumValues: ["driving", "walking", "transit"])
+                ],
+                required: ["origin", "destination"]
+            )
+        ]
+    }
+
+    // MARK: - Tool Execution
+
+    func executeTool(name: String, arguments: String) async -> [String: Any] {
+        Log.mcp.info("Executing LocationMaps tool: \(name)")
+        let args = parseArgs(arguments)
+
+        switch name {
+        case "location_get_current":
+            guard authorized else { return ["error": "Location permission not granted. Grant access in Settings > MCP."] }
+            return await getCurrentLocation()
+
+        case "maps_search_places":
+            guard let query = args["query"] as? String, !query.isEmpty else {
+                return ["error": "Missing required parameter: query"]
+            }
+            let near = args["near"] as? String
+            return await searchPlaces(query: query, near: near)
+
+        case "maps_geocode":
+            guard let address = args["address"] as? String, !address.isEmpty else {
+                return ["error": "Missing required parameter: address"]
+            }
+            return await geocode(address: address)
+
+        case "maps_get_directions":
+            guard let origin = args["origin"] as? String, let destination = args["destination"] as? String else {
+                return ["error": "Missing required parameter: origin and/or destination"]
+            }
+            let transportType = args["transport_type"] as? String ?? "driving"
+            return await getDirections(origin: origin, destination: destination, transportType: transportType)
+
+        default:
+            return ["error": "Unknown LocationMaps tool: \(name)"]
+        }
+    }
+
+    // MARK: - Implementations
+
+    private func getCurrentLocation() async -> [String: Any] {
+        guard let location = await currentLocation() else {
+            return ["error": "Could not determine current location"]
+        }
+        var result: [String: Any] = [
+            "latitude": location.coordinate.latitude,
+            "longitude": location.coordinate.longitude
+        ]
+        if let mapItem = await reverseGeocode(location), let address = addressString(for: mapItem) {
+            result["address"] = address
+        }
+        return result
+    }
+
+    private func searchPlaces(query: String, near: String?) async -> [String: Any] {
+        let request = MKLocalSearch.Request()
+        request.naturalLanguageQuery = query
+        if let near, let coordinate = await coordinate(for: near) {
+            request.region = MKCoordinateRegion(center: coordinate, latitudinalMeters: 20_000, longitudinalMeters: 20_000)
+        }
+
+        do {
+            let response = try await MKLocalSearch(request: request).start()
+            let places = response.mapItems.prefix(15).map { item -> [String: Any] in
+                var place: [String: Any] = ["name": item.name ?? "Unknown"]
+                place["latitude"] = item.location.coordinate.latitude
+                place["longitude"] = item.location.coordinate.longitude
+                if let address = addressString(for: item) {
+                    place["address"] = address
+                }
+                if let phone = item.phoneNumber { place["phone"] = phone }
+                return place
+            }
+            return ["count": places.count, "places": Array(places)]
+        } catch {
+            return ["error": "Search failed: \(error.localizedDescription)"]
+        }
+    }
+
+    private func geocode(address: String) async -> [String: Any] {
+        guard let request = MKGeocodingRequest(addressString: address) else {
+            return ["error": "Invalid address: \(address)"]
+        }
+        do {
+            guard let mapItem = try await request.mapItems.first else {
+                return ["error": "No results found for address: \(address)"]
+            }
+            var result: [String: Any] = [
+                "latitude": mapItem.location.coordinate.latitude,
+                "longitude": mapItem.location.coordinate.longitude
+            ]
+            if let formatted = addressString(for: mapItem) {
+                result["formatted_address"] = formatted
+            }
+            return result
+        } catch {
+            return ["error": "Geocoding failed: \(error.localizedDescription)"]
+        }
+    }
+
+    private func getDirections(origin: String, destination: String, transportType: String) async -> [String: Any] {
+        guard let originCoordinate = await coordinate(for: origin) else {
+            return ["error": "Could not resolve origin: \(origin)"]
+        }
+        guard let destinationCoordinate = await coordinate(for: destination) else {
+            return ["error": "Could not resolve destination: \(destination)"]
+        }
+
+        let request = MKDirections.Request()
+        request.source = MKMapItem(location: CLLocation(latitude: originCoordinate.latitude, longitude: originCoordinate.longitude), address: nil)
+        request.destination = MKMapItem(location: CLLocation(latitude: destinationCoordinate.latitude, longitude: destinationCoordinate.longitude), address: nil)
+        switch transportType {
+        case "walking": request.transportType = .walking
+        case "transit": request.transportType = .transit
+        default: request.transportType = .automobile
+        }
+
+        do {
+            let response = try await MKDirections(request: request).calculate()
+            guard let route = response.routes.first else {
+                return ["error": "No route found"]
+            }
+            let distanceFormatter = MKDistanceFormatter()
+            let durationFormatter = DateComponentsFormatter()
+            durationFormatter.allowedUnits = [.hour, .minute]
+            durationFormatter.unitsStyle = .short
+
+            return [
+                "distance_meters": route.distance,
+                "distance_text": distanceFormatter.string(fromDistance: route.distance),
+                "duration_seconds": route.expectedTravelTime,
+                "duration_text": durationFormatter.string(from: route.expectedTravelTime) ?? "",
+                "transport_type": transportType
+            ]
+        } catch {
+            return ["error": "Directions failed: \(error.localizedDescription)"]
+        }
+    }
+
+    // MARK: - Helpers
+
+    private func coordinate(for text: String) async -> CLLocationCoordinate2D? {
+        let parts = text.split(separator: ",").map { $0.trimmingCharacters(in: .whitespaces) }
+        if parts.count == 2, let lat = Double(parts[0]), let lon = Double(parts[1]) {
+            return CLLocationCoordinate2D(latitude: lat, longitude: lon)
+        }
+        guard let request = MKGeocodingRequest(addressString: text) else { return nil }
+        if let mapItems = try? await request.mapItems, let mapItem = mapItems.first {
+            return mapItem.location.coordinate
+        }
+        return nil
+    }
+
+    private func reverseGeocode(_ location: CLLocation) async -> MKMapItem? {
+        guard let request = MKReverseGeocodingRequest(location: location) else { return nil }
+        let mapItems = try? await request.mapItems
+        return mapItems?.first
+    }
+
+    private func addressString(for mapItem: MKMapItem) -> String? {
+        mapItem.address?.fullAddress
+            ?? mapItem.addressRepresentations?.fullAddress(includingRegion: true, singleLine: true)
+    }
+
+    private func parseArgs(_ arguments: String) -> [String: Any] {
+        guard let data = arguments.data(using: .utf8),
+              let dict = try? JSONSerialization.jsonObject(with: data) as? [String: Any] else {
+            return [:]
+        }
+        return dict
+    }
+
+    private func makeTool(name: String, description: String, properties: [String: Tool.Function.Parameters.Property], required: [String]) -> Tool {
+        Tool(
+            type: "function",
+            function: Tool.Function(
+                name: name,
+                description: description,
+                parameters: Tool.Function.Parameters(
+                    type: "object",
+                    properties: properties,
+                    required: required
+                )
+            )
+        )
+    }
+
+    private func prop(_ type: String, _ description: String, enumValues: [String]? = nil) -> Tool.Function.Parameters.Property {
+        Tool.Function.Parameters.Property(type: type, description: description, enum: enumValues)
+    }
+}

oAI/Services/MCPService.swift

@@ -98,6 +98,17 @@ class MCPService {
 
     func isPathAllowed(_ path: String) -> Bool {
         let resolved = ((path as NSString).expandingTildeInPath as NSString).standardizingPath
+        // Always allow the system temp directory — external MCP servers and tools write
+        // intermediate data there (e.g. Safari MCP page-content files, generated images).
+        // Check both NSTemporaryDirectory() (per-user Darwin temp dir) and /tmp (what this
+        // codebase's own temp files actually use, e.g. ChatViewModel's /tmp/oai_generated_*
+        // and ExternalMCPClient's /tmp/oai_mcp_* — they resolve to different directories.
+        let tmpCandidates = [
+            (NSTemporaryDirectory() as NSString).standardizingPath,
+            "/tmp",
+            "/private/tmp"
+        ]
+        if tmpCandidates.contains(where: { resolved.hasPrefix($0) }) { return true }
         return allowedFolders.contains { resolved.hasPrefix($0) }
     }
 
@@ -111,6 +122,9 @@ class MCPService {
 
     private let anytypeService = AnytypeMCPService.shared
     private let paperlessService = PaperlessService.shared
+    private let eventKitService = EventKitService.shared
+    private let contactsService = ContactsService.shared
+    private let locationMapsService = LocationMapsService.shared
 
     // MARK: - Bash Approval State
 
@@ -124,6 +138,19 @@ class MCPService {
     private var pendingBashContinuation: CheckedContinuation<[String: Any], Never>? = nil
     private(set) var bashSessionApproved: Bool = false
 
+    // MARK: - Personal Data (Calendar/Reminders) Approval State
+
+    struct PendingPersonalDataAction: Identifiable {
+        let id = UUID()
+        let toolName: String
+        let argumentsJSON: String
+        let summary: String
+    }
+
+    private(set) var pendingPersonalDataAction: PendingPersonalDataAction? = nil
+    private var pendingPersonalDataContinuation: CheckedContinuation<[String: Any], Never>? = nil
+    private(set) var personalDataSessionApproved: Bool = false
+
     // MARK: - Tool Schema Generation
 
     func getToolSchemas(onlineMode: Bool = false) -> [Tool] {
@@ -232,6 +259,24 @@ class MCPService {
             tools.append(contentsOf: paperlessService.getToolSchemas())
         }
 
+        // Add Calendar/Reminders tools if enabled
+        if settings.calendarEnabled || settings.remindersEnabled {
+            tools.append(contentsOf: eventKitService.getToolSchemas(
+                calendarEnabled: settings.calendarEnabled,
+                remindersEnabled: settings.remindersEnabled
+            ))
+        }
+
+        // Add Contacts tools if enabled
+        if settings.contactsEnabled {
+            tools.append(contentsOf: contactsService.getToolSchemas())
+        }
+
+        // Add Location/Maps tools if enabled
+        if settings.locationMapsEnabled {
+            tools.append(contentsOf: locationMapsService.getToolSchemas())
+        }
+
         // Add bash_execute tool when bash is enabled
         if settings.bashEnabled {
             let workDir = settings.bashWorkingDirectory
@@ -260,6 +305,25 @@ class MCPService {
             ))
         }
 
+        // Add spawn_research_agents when Research Agents are enabled
+        if settings.agentsEnabled {
+            tools.append(makeTool(
+                name: "spawn_research_agents",
+                description: "Spawn multiple READ-ONLY research sub-agents that investigate independent questions IN PARALLEL. Each sub-agent gets its own read_file/list_directory/search_files/web_search loop — no write, no bash, no nesting (sub-agents cannot call this tool). ONLY use this when you have 2 or more genuinely independent research questions that benefit from running at the same time (e.g. comparing several unrelated files, topics, or sources). Do NOT use this for a single lookup, a sequential task, or anything answerable with one direct tool call — call read_file/search_files/web_search yourself instead. Each sub-agent is its own full chain of model calls and meaningfully increases cost and latency; using this for trivial tasks is wasteful. Prefer the smallest number of tasks that actually need to run in parallel.",
+                properties: [
+                    "tasks": Tool.Function.Parameters.Property(
+                        type: "array",
+                        description: "List of independent, self-contained research questions — one per sub-agent. Keep this list as short as the task genuinely requires.",
+                        items: .init(type: "string")
+                    )
+                ],
+                required: ["tasks"]
+            ))
+        }
+
+        // Add tools from external MCP servers (stdio JSON-RPC protocol)
+        tools.append(contentsOf: ExternalMCPManager.shared.getToolSchemas())
+
         return tools
     }
 
@@ -284,7 +348,10 @@ class MCPService {
 
     // MARK: - Tool Execution
 
-    func executeTool(name: String, arguments: String) async -> [String: Any] {
+    /// `agentProvider`/`agentModelId` are only needed for `spawn_research_agents`, which drives
+    /// its own model calls — every other tool ignores them. Passed in by the caller's active
+    /// chat session rather than stored on MCPService, since this service has no provider state.
+    func executeTool(name: String, arguments: String, agentProvider: AIProvider? = nil, agentModelId: String? = nil) async -> [String: Any] {
         Log.mcp.info("Executing tool: \(name)")
         guard let argData = arguments.data(using: .utf8),
               let args = try? JSONSerialization.jsonObject(with: argData) as? [String: Any] else {
@@ -399,7 +466,30 @@ class MCPService {
             let mapped = results.map { ["title": $0.title, "url": $0.url, "snippet": $0.snippet] }
             return ["results": mapped]
 
+        case "spawn_research_agents":
+            guard settings.agentsEnabled else {
+                return ["error": "Research agents are disabled. Enable 'Research Agents' in Settings > MCP."]
+            }
+            guard let agentProvider, let agentModelId else {
+                return ["error": "Internal error: missing model context for spawn_research_agents"]
+            }
+            guard let tasks = args["tasks"] as? [String], !tasks.isEmpty else {
+                return ["error": "Missing required parameter: tasks (non-empty array of strings)"]
+            }
+            return await runResearchAgents(tasks: tasks, provider: agentProvider, modelId: agentModelId)
+
+        case "calendar_create_event", "reminders_create", "reminders_complete":
+            guard settings.calendarEnabled || settings.remindersEnabled else {
+                return ["error": "Calendar/Reminders access is disabled. Enable it in Settings > MCP."]
+            }
+            let summary = eventKitService.approvalSummary(forTool: name, arguments: arguments)
+            return await executePersonalDataAction(toolName: name, argumentsJSON: arguments, summary: summary)
+
         default:
+            // Route to external MCP servers (stdio JSON-RPC)
+            if ExternalMCPManager.shared.isExternalTool(name) {
+                return await ExternalMCPManager.shared.executeTool(name: name, argumentsJSON: arguments)
+            }
             // Route anytype_* tools to AnytypeMCPService
             if name.hasPrefix("anytype_") {
                 return await anytypeService.executeTool(name: name, arguments: arguments)
@@ -408,6 +498,18 @@ class MCPService {
             if name.hasPrefix("paperless_") {
                 return await paperlessService.executeTool(name: name, arguments: arguments)
             }
+            // Route calendar_*/reminders_* read tools to EventKitService
+            if name.hasPrefix("calendar_") || name.hasPrefix("reminders_") {
+                return await eventKitService.executeTool(name: name, arguments: arguments)
+            }
+            // Route contacts_* tools to ContactsService
+            if name.hasPrefix("contacts_") {
+                return await contactsService.executeTool(name: name, arguments: arguments)
+            }
+            // Route location_*/maps_* tools to LocationMapsService
+            if name.hasPrefix("location_") || name.hasPrefix("maps_") {
+                return await locationMapsService.executeTool(name: name, arguments: arguments)
+            }
             return ["error": "Unknown tool: \(name)"]
         }
     }
@@ -754,6 +856,11 @@ class MCPService {
         if bashSessionApproved {
             return await runBashCommand(command, workingDirectory: workingDirectory)
         }
+        // 2nd Brain calls its helper script via bash_execute — let the user mark that
+        // specific traffic as always-trusted instead of approving it every time.
+        if isTrustedSecondBrainCommand(command) {
+            return await runBashCommand(command, workingDirectory: workingDirectory)
+        }
         return await withCheckedContinuation { continuation in
             DispatchQueue.main.async {
                 self.pendingBashCommand = PendingBashCommand(command: command, workingDirectory: workingDirectory)
@@ -786,6 +893,190 @@ class MCPService {
         bashSessionApproved = false
     }
 
+    private func isTrustedSecondBrainCommand(_ command: String) -> Bool {
+        guard settings.trustSecondBrainSkill, command.contains(".brain_helper.py") else { return false }
+        return settings.agentSkills.contains { $0.isActive && $0.isSecondBrainSkill }
+    }
+
+    // MARK: - Research Agents (read-only, parallel)
+
+    /// Runs `tasks.count` sub-agents (capped) with bounded concurrency, each in its own
+    /// read-only tool loop, and returns their findings concatenated for the orchestrator.
+    private func runResearchAgents(tasks: [String], provider: AIProvider, modelId: String) async -> [String: Any] {
+        let maxConcurrent = max(1, min(5, settings.maxConcurrentAgents))
+        // Hard cap on total sub-agents regardless of concurrency setting, so a model
+        // requesting an unreasonably long task list can't run away with cost.
+        let cappedTasks = Array(tasks.prefix(8))
+
+        var results: [(Int, String)] = []
+        await withTaskGroup(of: (Int, String).self) { group in
+            var nextIndex = 0
+            func launchNext() {
+                guard nextIndex < cappedTasks.count else { return }
+                let idx = nextIndex
+                let task = cappedTasks[idx]
+                nextIndex += 1
+                group.addTask {
+                    let answer = await self.runSingleResearchAgent(task: task, provider: provider, modelId: modelId)
+                    return (idx, answer)
+                }
+            }
+            for _ in 0..<min(maxConcurrent, cappedTasks.count) { launchNext() }
+            for await result in group {
+                results.append(result)
+                launchNext()
+            }
+        }
+
+        let sorted = results.sorted { $0.0 < $1.0 }
+        let formatted = sorted.map { idx, answer in
+            "### Agent \(idx + 1): \(cappedTasks[idx])\n\(answer)"
+        }.joined(separator: "\n\n")
+
+        var response: [String: Any] = ["agent_count": sorted.count, "results": formatted]
+        if tasks.count > cappedTasks.count {
+            response["note"] = "Only the first \(cappedTasks.count) of \(tasks.count) requested tasks were run (per-call cap)."
+        }
+        return response
+    }
+
+    /// A single sub-agent's self-contained tool loop. Read-only tools only; cannot write,
+    /// run bash, or spawn further sub-agents (spawn_research_agents is not in its tool list).
+    private func runSingleResearchAgent(task: String, provider: AIProvider, modelId: String) async -> String {
+        let readOnlyTools: [Tool] = [
+            makeTool(
+                name: "read_file",
+                description: "Read the contents of a file. Maximum file size is 10MB.",
+                properties: ["file_path": prop("string", "The absolute path to the file to read")],
+                required: ["file_path"]
+            ),
+            makeTool(
+                name: "list_directory",
+                description: "List the contents of a directory. Skips hidden/build directories like .git, node_modules, etc.",
+                properties: [
+                    "dir_path": prop("string", "The absolute path to the directory to list"),
+                    "recursive": prop("boolean", "Whether to list recursively (default: false)")
+                ],
+                required: ["dir_path"]
+            ),
+            makeTool(
+                name: "search_files",
+                description: "Search for files by name pattern or content.",
+                properties: [
+                    "pattern": prop("string", "Glob pattern to match filenames (e.g. '*.py', 'README*')"),
+                    "search_path": prop("string", "Directory to search in (defaults to first allowed folder)"),
+                    "content_search": prop("string", "Optional text to search for inside files")
+                ],
+                required: ["pattern"]
+            ),
+            makeTool(
+                name: "web_search",
+                description: "Search the web for current information using DuckDuckGo.",
+                properties: ["query": prop("string", "The search query to look up")],
+                required: ["query"]
+            )
+        ]
+        let allowedNames = Set(readOnlyTools.map { $0.function.name })
+
+        var apiMessages: [[String: Any]] = [
+            ["role": "system", "content": "You are a read-only research sub-agent. Investigate the assigned task using the available tools and report concise findings as plain text. You cannot write, delete, or execute anything, and cannot spawn further sub-agents. Once you have enough information, respond with your final answer and stop calling tools."],
+            ["role": "user", "content": task]
+        ]
+
+        let maxIterations = 6
+        for iteration in 0..<maxIterations {
+            if Task.isCancelled { return "(cancelled)" }
+
+            guard let response = try? await provider.chatWithToolMessages(
+                model: modelId, messages: apiMessages, tools: readOnlyTools, maxTokens: nil, temperature: nil
+            ) else {
+                return "(error: sub-agent request failed)"
+            }
+
+            let toolCalls = response.toolCalls ?? []
+            guard !toolCalls.isEmpty else {
+                return response.content.isEmpty ? "(no findings)" : response.content
+            }
+
+            var assistantMsg: [String: Any] = ["role": "assistant"]
+            if !response.content.isEmpty { assistantMsg["content"] = response.content }
+            assistantMsg["tool_calls"] = toolCalls.map { tc in
+                ["id": tc.id, "type": tc.type, "function": ["name": tc.functionName, "arguments": tc.arguments]]
+            }
+            apiMessages.append(assistantMsg)
+
+            for tc in toolCalls {
+                let resultJSON: String
+                if allowedNames.contains(tc.functionName) {
+                    let result = await executeTool(name: tc.functionName, arguments: tc.arguments)
+                    resultJSON = serializeToolResult(result)
+                } else {
+                    resultJSON = "{\"error\": \"Tool not available to research sub-agents\"}"
+                }
+                apiMessages.append([
+                    "role": "tool",
+                    "tool_call_id": tc.id,
+                    "name": tc.functionName,
+                    "content": resultJSON
+                ])
+            }
+
+            if iteration == maxIterations - 1 {
+                return "(research incomplete: sub-agent reached its iteration limit)"
+            }
+        }
+        return "(no findings)"
+    }
+
+    private func serializeToolResult(_ result: [String: Any], maxBytes: Int = 20_000) -> String {
+        guard let data = try? JSONSerialization.data(withJSONObject: result),
+              let str = String(data: data, encoding: .utf8) else {
+            return "{\"error\": \"Failed to serialize result\"}"
+        }
+        guard str.utf8.count > maxBytes, let truncated = String(str.utf8.prefix(maxBytes)) else {
+            return str
+        }
+        return truncated + "\n... (result truncated)"
+    }
+
+    // MARK: - Personal Data (Calendar/Reminders) Approval
+
+    private func executePersonalDataAction(toolName: String, argumentsJSON: String, summary: String) async -> [String: Any] {
+        guard settings.personalDataRequireApproval, !personalDataSessionApproved else {
+            return await eventKitService.executeWriteTool(name: toolName, arguments: argumentsJSON)
+        }
+        return await withCheckedContinuation { continuation in
+            DispatchQueue.main.async {
+                self.pendingPersonalDataAction = PendingPersonalDataAction(toolName: toolName, argumentsJSON: argumentsJSON, summary: summary)
+                self.pendingPersonalDataContinuation = continuation
+            }
+        }
+    }
+
+    func approvePendingPersonalDataAction(forSession: Bool = false) {
+        guard let pending = pendingPersonalDataAction, let cont = pendingPersonalDataContinuation else { return }
+        pendingPersonalDataAction = nil
+        pendingPersonalDataContinuation = nil
+        if forSession {
+            personalDataSessionApproved = true
+        }
+        Task.detached(priority: .userInitiated) {
+            let result = await self.eventKitService.executeWriteTool(name: pending.toolName, arguments: pending.argumentsJSON)
+            cont.resume(returning: result)
+        }
+    }
+
+    func denyPendingPersonalDataAction() {
+        guard pendingPersonalDataAction != nil else { return }
+        pendingPersonalDataAction = nil
+        pendingPersonalDataContinuation?.resume(returning: ["error": "User denied this action"])
+        pendingPersonalDataContinuation = nil
+    }
+
+    func resetPersonalDataSessionApproval() {
+        personalDataSessionApproved = false
+    }
+
     private func runBashCommand(_ command: String, workingDirectory: String) async -> [String: Any] {
         let timeoutSeconds = settings.bashTimeout
         let workDir = ((workingDirectory as NSString).expandingTildeInPath as NSString).standardizingPath

oAI/Services/SettingsService.swift

@@ -27,6 +27,18 @@ import Foundation
 import os
 import Security
 
+/// Kill switch for the Personal Data tools (Calendar/Reminders/Contacts/Location & Maps).
+/// Flip `isHiddenPendingAppleFix` back to `false` once Apple fixes the macOS 27 beta TCC bug
+/// (filed with Apple). Each flag hides the relevant UI and forces the `*Enabled` getter to
+/// return `false` regardless of the persisted DB value — no code deleted, just inert.
+enum PersonalDataTools {
+    /// Hides the entire Personal Data section. Flip to `false` once all four services work.
+    static let isHiddenPendingAppleFix = false
+    /// Hides only the Contacts row. Contacts TCC still broken under hardened runtime on
+    /// macOS 27 beta 2 while Calendar/Reminders/Location are fixed. Flip to `false` once fixed.
+    static let isContactsHiddenPendingAppleFix = true
+}
+
 @Observable
 class SettingsService {
     static let shared = SettingsService()
@@ -449,6 +461,48 @@ class SettingsService {
         }
     }
 
+    // MARK: - External MCP Servers
+
+    var externalMCPServers: [ExternalMCPServer] {
+        get {
+            guard let json = cache["externalMCPServers"],
+                  let data = json.data(using: .utf8) else { return [] }
+            let decoder = JSONDecoder()
+            decoder.dateDecodingStrategy = .iso8601
+            return (try? decoder.decode([ExternalMCPServer].self, from: data)) ?? []
+        }
+        set {
+            let encoder = JSONEncoder()
+            encoder.dateEncodingStrategy = .iso8601
+            if let data = try? encoder.encode(newValue),
+               let json = String(data: data, encoding: .utf8) {
+                cache["externalMCPServers"] = json
+                DatabaseService.shared.setSetting(key: "externalMCPServers", value: json)
+            }
+            Task { @MainActor in ExternalMCPManager.shared.reconfigure(servers: newValue) }
+        }
+    }
+
+    func addExternalMCPServer(_ server: ExternalMCPServer) {
+        externalMCPServers = externalMCPServers + [server]
+    }
+
+    func updateExternalMCPServer(_ server: ExternalMCPServer) {
+        externalMCPServers = externalMCPServers.map { $0.id == server.id ? server : $0 }
+    }
+
+    func deleteExternalMCPServer(id: UUID) {
+        externalMCPServers = externalMCPServers.filter { $0.id != id }
+    }
+
+    func toggleExternalMCPServer(id: UUID) {
+        externalMCPServers = externalMCPServers.map { s in
+            s.id == id ? ExternalMCPServer(id: s.id, name: s.name, command: s.command,
+                                           args: s.args, isEnabled: !s.isEnabled,
+                                           timeout: s.timeout, createdAt: s.createdAt) : s
+        }
+    }
+
     // MARK: - Favorite Models
 
     var favoriteModelIds: Set<String> {
@@ -577,6 +631,37 @@ class SettingsService {
         }
     }
 
+    // MARK: - Research Agents Settings
+
+    /// When true, the AI can call `spawn_research_agents` to run multiple read-only
+    /// sub-agents in parallel. Each sub-agent is its own full chain of model calls, so
+    /// this can noticeably increase cost — opt-in, off by default.
+    var agentsEnabled: Bool {
+        get { cache["agentsEnabled"] == "true" }
+        set {
+            cache["agentsEnabled"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "agentsEnabled", value: String(newValue))
+        }
+    }
+
+    var maxConcurrentAgents: Int {
+        get { cache["maxConcurrentAgents"].flatMap(Int.init) ?? 3 }
+        set {
+            cache["maxConcurrentAgents"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "maxConcurrentAgents", value: String(newValue))
+        }
+    }
+
+    /// When true (and an active "2nd Brain" Agent Skill is installed), bash commands that
+    /// invoke the 2nd Brain helper script skip the approval dialog entirely.
+    var trustSecondBrainSkill: Bool {
+        get { cache["trustSecondBrainSkill"] == "true" }
+        set {
+            cache["trustSecondBrainSkill"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "trustSecondBrainSkill", value: String(newValue))
+        }
+    }
+
     var bashWorkingDirectory: String {
         get { cache["bashWorkingDirectory"] ?? "~" }
         set {
@@ -593,6 +678,48 @@ class SettingsService {
         }
     }
 
+    // MARK: - Personal Data Settings (Calendar/Reminders/Contacts/Location/Maps)
+
+    var calendarEnabled: Bool {
+        get { !PersonalDataTools.isHiddenPendingAppleFix && cache["calendarEnabled"] == "true" }
+        set {
+            cache["calendarEnabled"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "calendarEnabled", value: String(newValue))
+        }
+    }
+
+    var remindersEnabled: Bool {
+        get { !PersonalDataTools.isHiddenPendingAppleFix && cache["remindersEnabled"] == "true" }
+        set {
+            cache["remindersEnabled"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "remindersEnabled", value: String(newValue))
+        }
+    }
+
+    var contactsEnabled: Bool {
+        get { !PersonalDataTools.isHiddenPendingAppleFix && !PersonalDataTools.isContactsHiddenPendingAppleFix && cache["contactsEnabled"] == "true" }
+        set {
+            cache["contactsEnabled"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "contactsEnabled", value: String(newValue))
+        }
+    }
+
+    var locationMapsEnabled: Bool {
+        get { !PersonalDataTools.isHiddenPendingAppleFix && cache["locationMapsEnabled"] == "true" }
+        set {
+            cache["locationMapsEnabled"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "locationMapsEnabled", value: String(newValue))
+        }
+    }
+
+    var personalDataRequireApproval: Bool {
+        get { cache["personalDataRequireApproval"].map { $0 == "true" } ?? true }
+        set {
+            cache["personalDataRequireApproval"] = String(newValue)
+            DatabaseService.shared.setSetting(key: "personalDataRequireApproval", value: String(newValue))
+        }
+    }
+
     // MARK: - Paperless-NGX Settings
 
     var paperlessEnabled: Bool {

oAI/Utilities/Extensions/Color+Extensions.swift

@@ -60,11 +60,10 @@ extension Color {
     
     static func providerColor(_ provider: Settings.Provider) -> Color {
         switch provider {
-        case .openrouter:    return Color(hex: "#7c3aed")  // Purple
-        case .anthropic:     return Color(hex: "#d4895a")  // Orange
-        case .openai:        return Color(hex: "#10a37f")  // Green
-        case .ollama:        return Color(hex: "#ffffff")  // White
-        case .appleOnDevice: return Color(hex: "#636366")  // Apple grey
+        case .openrouter: return Color(hex: "#7c3aed")  // Purple
+        case .anthropic: return Color(hex: "#d4895a")    // Orange
+        case .openai: return Color(hex: "#10a37f")       // Green
+        case .ollama: return Color(hex: "#ffffff")       // White
         }
     }
     

oAI/Utilities/Logging.swift

@@ -52,7 +52,7 @@ enum LogLevel: Int, Comparable, CaseIterable, Sendable {
         }
     }
 
-    static func < (lhs: LogLevel, rhs: LogLevel) -> Bool {
+    nonisolated static func < (lhs: LogLevel, rhs: LogLevel) -> Bool {
         lhs.rawValue < rhs.rawValue
     }
 }
@@ -60,7 +60,7 @@ enum LogLevel: Int, Comparable, CaseIterable, Sendable {
 // MARK: - File Logger
 
 final class FileLogger: @unchecked Sendable {
-    static let shared = FileLogger()
+    nonisolated static let shared = FileLogger()
 
     private let fileHandle: FileHandle?
     private let queue = DispatchQueue(label: "com.oai.filelogger")
@@ -70,8 +70,8 @@ final class FileLogger: @unchecked Sendable {
         return f
     }()
 
-    /// Current minimum log level (read from UserDefaults for thread safety)
-    var minimumLevel: LogLevel {
+    /// Current minimum log level (backed by UserDefaults — thread-safe).
+    nonisolated var minimumLevel: LogLevel {
         get {
             let raw = UserDefaults.standard.integer(forKey: "logLevel")
             return LogLevel(rawValue: raw) ?? .info
@@ -95,7 +95,7 @@ final class FileLogger: @unchecked Sendable {
         fileHandle?.seekToEndOfFile()
     }
 
-    func write(_ level: LogLevel, category: String, message: String) {
+    nonisolated func write(_ level: LogLevel, category: String, message: String) {
         guard level >= minimumLevel else { return }
         queue.async { [weak self] in
             guard let self, let fh = self.fileHandle else { return }
@@ -153,4 +153,5 @@ enum Log {
     nonisolated static let search   = AppLogger(subsystem: subsystem, category: "search")
     nonisolated static let ui       = AppLogger(subsystem: subsystem, category: "ui")
     nonisolated static let general  = AppLogger(subsystem: subsystem, category: "general")
+    nonisolated static let extMcp   = AppLogger(subsystem: subsystem, category: "ext-mcp")
 }

oAI/ViewModels/ChatViewModel.swift

@@ -360,7 +360,6 @@ Don't narrate future actions ("Let me...") - just use the tools.
     }
 
     func startAutoContinue() {
-        showSystemMessage("↩ Continuing…")
         silentContinuePrompt = "Please continue from where you left off."
         Task { @MainActor in
             generateAIResponse(to: "", attachments: nil)
@@ -424,8 +423,6 @@ Don't narrate future actions ("Let me...") - just use the tools.
     func inferProviderPublic(from modelId: String) -> Settings.Provider? { inferProvider(from: modelId) }
 
     private func inferProvider(from modelId: String) -> Settings.Provider? {
-        // Apple Foundation Models
-        if modelId.hasPrefix("apple-") { return .appleOnDevice }
         // OpenRouter models always contain a "/" (e.g. "anthropic/claude-3-5-sonnet")
         if modelId.contains("/") { return .openrouter }
         // Anthropic direct (e.g. "claude-sonnet-4-5-20250929")
@@ -801,8 +798,18 @@ Don't narrate future actions ("Let me...") - just use the tools.
         let mcpActive = mcpEnabled || settings.mcpEnabled
         let anytypeActive = settings.anytypeMcpEnabled && settings.anytypeMcpConfigured
         let bashActive = settings.bashEnabled
+        let personalDataActive = settings.calendarEnabled || settings.remindersEnabled || settings.contactsEnabled || settings.locationMapsEnabled
+        let researchAgentsActive = settings.agentsEnabled
+        let externalMCPActive = !settings.externalMCPServers.filter { $0.isEnabled }.isEmpty
+        // Dedicated images API path (OpenRouter /images endpoint — separate from chat completions)
+        if selectedModel?.capabilities.usesImagesAPI == true,
+           let orProvider = provider as? OpenRouterProvider {
+            generateImageAPIResponse(orProvider: orProvider, modelId: modelId, prompt: prompt)
+            return
+        }
+
         let modelSupportTools = selectedModel?.capabilities.tools ?? false
-        if modelSupportTools && (anytypeActive || bashActive || (mcpActive && !mcp.allowedFolders.isEmpty)) {
+        if modelSupportTools && (anytypeActive || bashActive || personalDataActive || researchAgentsActive || externalMCPActive || (mcpActive && !mcp.allowedFolders.isEmpty)) {
             generateAIResponseWithTools(provider: provider, modelId: modelId)
             return
         }
@@ -936,10 +943,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
                             messages[index].tokens = usage.completionTokens
                             if let model = selectedModel {
                                 let hasPricing = model.pricing.prompt > 0 || model.pricing.completion > 0
-                                let cost: Double? = hasPricing
-                                    ? (Double(usage.promptTokens) * model.pricing.prompt / 1_000_000) +
-                                      (Double(usage.completionTokens) * model.pricing.completion / 1_000_000)
-                                    : nil
+                                let cost: Double? = hasPricing ? calculateCost(usage: usage, pricing: model.pricing) : nil
                                 messages[index].cost = cost
                                 sessionStats.addMessage(inputTokens: usage.promptTokens, outputTokens: usage.completionTokens, cost: cost)
                             }
@@ -1003,10 +1007,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
                             messages[index].tokens = usage.completionTokens
                             if let model = selectedModel {
                                 let hasPricing = model.pricing.prompt > 0 || model.pricing.completion > 0
-                                let cost: Double? = hasPricing
-                                    ? (Double(usage.promptTokens) * model.pricing.prompt / 1_000_000) +
-                                      (Double(usage.completionTokens) * model.pricing.completion / 1_000_000)
-                                    : nil
+                                let cost: Double? = hasPricing ? calculateCost(usage: usage, pricing: model.pricing) : nil
                                 messages[index].cost = cost
                                 sessionStats.addMessage(inputTokens: usage.promptTokens, outputTokens: usage.completionTokens, cost: cost)
                             }
@@ -1269,6 +1270,55 @@ Don't narrate future actions ("Let me...") - just use the tools.
 
     // MARK: - AI Response with Tool Calls
 
+    // MARK: - Images API Generation
+
+    private func generateImageAPIResponse(orProvider: OpenRouterProvider, modelId: String, prompt: String) {
+        isGenerating = true
+        streamingTask?.cancel()
+        streamingTask = Task {
+            let startTime = Date()
+            let assistantMessage = Message(
+                role: .assistant,
+                content: ThinkingVerbs.random(),
+                tokens: nil,
+                cost: nil,
+                timestamp: Date(),
+                attachments: nil,
+                modelId: modelId,
+                isStreaming: true
+            )
+            let messageId = assistantMessage.id
+            messages.append(assistantMessage)
+
+            do {
+                let response = try await orProvider.generateImage(model: modelId, prompt: prompt)
+                let responseTime = Date().timeIntervalSince(startTime)
+
+                if let index = messages.firstIndex(where: { $0.id == messageId }) {
+                    messages[index].content = response.content
+                    messages[index].isStreaming = false
+                    messages[index].generatedImages = response.generatedImages
+                    messages[index].responseTime = responseTime
+
+                    if let usage = response.usage {
+                        messages[index].tokens = usage.completionTokens
+                        let cost = usage.rawCostUSD
+                        messages[index].cost = cost
+                        sessionStats.addMessage(inputTokens: usage.promptTokens, outputTokens: usage.completionTokens, cost: cost)
+                    }
+                }
+                _ = detectGoodbyePhrase(in: "")
+            } catch {
+                if let index = messages.firstIndex(where: { $0.id == messageId }) {
+                    messages[index].content = "❌ Image generation failed: \(error.localizedDescription)"
+                    messages[index].isStreaming = false
+                }
+                Log.api.error("Images API error: \(error)")
+            }
+            isGenerating = false
+        }
+    }
+
     private func generateAIResponseWithTools(provider: AIProvider, modelId: String) {
         let mcp = MCPService.shared
         Log.ui.info("generateAIResponseWithTools: model=\(modelId)")
@@ -1310,6 +1360,12 @@ Don't narrate future actions ("Let me...") - just use the tools.
                     systemParts.append("You have access to the user's Anytype knowledge base through tool calls (anytype_* tools). You can search across all spaces, list spaces, get objects, and create or update notes, tasks, and pages. Use these tools proactively when the user asks about their notes, tasks, or knowledge base.")
                 }
 
+                let activeExternalServers = settings.externalMCPServers.filter { $0.isEnabled }
+                if !activeExternalServers.isEmpty {
+                    let names = activeExternalServers.map { $0.name }.joined(separator: ", ")
+                    systemParts.append("You have access to external tools from MCP servers: \(names). Their tools are prefixed with the server slug (e.g. safari_navigate_to_url). Use them proactively when the user's request relates to what those servers provide.")
+                }
+
                 var systemContent = systemParts.joined(separator: "\n\n")
 
                 // Append the complete system prompt (default + custom)
@@ -1362,6 +1418,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
                 var didContinueAfterImages = false  // Only inject temp-file continuation once
                 var totalUsage: ChatResponse.Usage?
                 var hitIterationLimit = false  // Track if we exited due to hitting the limit
+                var finishedWithEmptyContent = false  // Model stopped calling tools but said nothing
 
                 for iteration in 0..<maxIterations {
                     if Task.isCancelled {
@@ -1414,6 +1471,12 @@ Don't narrate future actions ("Let me...") - just use the tools.
                                 continue
                             }
                         }
+                        if finalContent.isEmpty {
+                            // Some models (observed with Qwen via OpenRouter) stop calling tools
+                            // after a long tool-call chain but return no summarizing text at all.
+                            // Silently nudge a follow-up turn instead of showing a placeholder bubble.
+                            finishedWithEmptyContent = true
+                        }
                         break
                     }
 
@@ -1460,7 +1523,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
                             break
                         }
 
-                        let result = await mcp.executeTool(name: tc.functionName, arguments: tc.arguments)
+                        let result = await mcp.executeTool(name: tc.functionName, arguments: tc.arguments, agentProvider: provider, agentModelId: effectiveModelId)
                         let resultJSON: String
                         if let data = try? JSONSerialization.data(withJSONObject: result),
                            let str = String(data: data, encoding: .utf8) {
@@ -1501,9 +1564,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
                     // If this was the last iteration, note it
                     if iteration == maxIterations - 1 {
                         hitIterationLimit = true  // We're exiting with pending tool calls
-                        finalContent = response.content.isEmpty
-                            ? "[Tool loop reached maximum iterations]"
-                            : response.content
+                        finalContent = response.content
                     }
                 }
 
@@ -1512,44 +1573,57 @@ Don't narrate future actions ("Let me...") - just use the tools.
                     wasCancelled = true
                 }
 
+                // If we hit the iteration limit or the model returned no text at all, silently
+                // nudge a follow-up turn instead of showing a placeholder/blank bubble.
+                let willAutoContinue = (hitIterationLimit || finishedWithEmptyContent) && !wasCancelled
+
                 // Display the final response as an assistant message
                 let responseTime = Date().timeIntervalSince(startTime)
-                let assistantMessage = Message(
-                    role: .assistant,
-                    content: finalContent,
-                    tokens: totalUsage?.completionTokens,
-                    cost: nil,
-                    timestamp: Date(),
-                    attachments: nil,
-                    responseTime: responseTime,
-                    wasInterrupted: wasCancelled,
-                    modelId: modelId,
-                    generatedImages: finalImages.isEmpty ? nil : finalImages
-                )
-                messages.append(assistantMessage)
-
-                // Calculate cost
-                if let usage = totalUsage, let model = selectedModel {
-                    let hasPricing = model.pricing.prompt > 0 || model.pricing.completion > 0
-                    let cost: Double? = hasPricing
-                        ? (Double(usage.promptTokens) * model.pricing.prompt / 1_000_000) +
-                          (Double(usage.completionTokens) * model.pricing.completion / 1_000_000)
-                        : nil
-                    if let index = messages.lastIndex(where: { $0.id == assistantMessage.id }) {
-                        messages[index].cost = cost
+                if willAutoContinue && finalContent.isEmpty {
+                    // Nothing worth showing yet — still record usage/cost for this turn.
+                    if let usage = totalUsage, let model = selectedModel {
+                        let hasPricing = model.pricing.prompt > 0 || model.pricing.completion > 0
+                        let cost: Double? = hasPricing ? calculateCost(usage: usage, pricing: model.pricing) : nil
+                        sessionStats.addMessage(
+                            inputTokens: usage.promptTokens,
+                            outputTokens: usage.completionTokens,
+                            cost: cost
+                        )
                     }
-                    sessionStats.addMessage(
-                        inputTokens: usage.promptTokens,
-                        outputTokens: usage.completionTokens,
-                        cost: cost
+                } else {
+                    let assistantMessage = Message(
+                        role: .assistant,
+                        content: finalContent,
+                        tokens: totalUsage?.completionTokens,
+                        cost: nil,
+                        timestamp: Date(),
+                        attachments: nil,
+                        responseTime: responseTime,
+                        wasInterrupted: wasCancelled,
+                        modelId: modelId,
+                        generatedImages: finalImages.isEmpty ? nil : finalImages
                     )
+                    messages.append(assistantMessage)
+
+                    // Calculate cost
+                    if let usage = totalUsage, let model = selectedModel {
+                        let hasPricing = model.pricing.prompt > 0 || model.pricing.completion > 0
+                        let cost: Double? = hasPricing ? calculateCost(usage: usage, pricing: model.pricing) : nil
+                        if let index = messages.lastIndex(where: { $0.id == assistantMessage.id }) {
+                            messages[index].cost = cost
+                        }
+                        sessionStats.addMessage(
+                            inputTokens: usage.promptTokens,
+                            outputTokens: usage.completionTokens,
+                            cost: cost
+                        )
+                    }
                 }
 
                 isGenerating = false
                 streamingTask = nil
 
-                // If we hit the iteration limit and weren't cancelled, start auto-continue
-                if hitIterationLimit && !wasCancelled {
+                if willAutoContinue {
                     startAutoContinue()
                 }
 
@@ -2182,6 +2256,18 @@ Don't narrate future actions ("Let me...") - just use the tools.
         }
     }
 
+    /// Cost for one response's usage, accounting for Anthropic-style prompt-cache
+    /// pricing when present: cache writes cost 1.25x the base input rate, cache
+    /// reads cost 0.1x. `usage.promptTokens` is already the uncached remainder —
+    /// it does not need cache tokens subtracted from it.
+    private func calculateCost(usage: ChatResponse.Usage, pricing: ModelInfo.Pricing) -> Double {
+        let inputCost = Double(usage.promptTokens) * pricing.prompt / 1_000_000
+        let cacheReadCost = Double(usage.cacheReadInputTokens ?? 0) * pricing.prompt * 0.1 / 1_000_000
+        let cacheWriteCost = Double(usage.cacheCreationInputTokens ?? 0) * pricing.prompt * 1.25 / 1_000_000
+        let outputCost = Double(usage.completionTokens) * pricing.completion / 1_000_000
+        return inputCost + cacheReadCost + cacheWriteCost + outputCost
+    }
+
     /// Summarize a chunk of messages into a concise summary
     private func summarizeMessageChunk(_ messages: [Message]) async -> String? {
         guard let provider = providerRegistry.getProvider(for: currentProvider),

oAI/Views/Main/ChatView.swift

@@ -38,7 +38,10 @@ struct ChatView: View {
                 provider: viewModel.currentProvider,
                 model: viewModel.selectedModel,
                 onModelSelect: onModelSelect,
-                onProviderChange: onProviderChange
+                onProviderChange: onProviderChange,
+                conversationName: viewModel.currentConversationName,
+                hasUnsavedChanges: viewModel.hasUnsavedChanges,
+                onQuickSave: viewModel.quickSave
             )
 
             // Messages
@@ -120,6 +123,16 @@ struct ChatView: View {
                 onDeny: { MCPService.shared.denyPendingBashCommand() }
             )
         }
+        .sheet(item: Binding(
+            get: { MCPService.shared.pendingPersonalDataAction },
+            set: { _ in }
+        )) { pending in
+            PersonalDataApprovalSheet(
+                pending: pending,
+                onApprove: { forSession in MCPService.shared.approvePendingPersonalDataAction(forSession: forSession) },
+                onDeny: { MCPService.shared.denyPendingPersonalDataAction() }
+            )
+        }
     }
 }
 

oAI/Views/Main/FooterView.swift

@@ -93,15 +93,6 @@ struct FooterView: View {
             }
             #endif
 
-            // Save indicator (only when chat has messages)
-            if stats.messageCount > 0 {
-                SaveIndicator(
-                    conversationName: conversationName,
-                    hasUnsavedChanges: hasUnsavedChanges,
-                    onSave: onQuickSave
-                )
-            }
-
             // Update available badge (shows only when an update exists — no version number)
             #if os(macOS)
             UpdateBadge()

oAI/Views/Main/HeaderView.swift

@@ -31,109 +31,24 @@ struct HeaderView: View {
     let model: ModelInfo?
     let onModelSelect: () -> Void
     let onProviderChange: (Settings.Provider) -> Void
+    var conversationName: String? = nil
+    var hasUnsavedChanges: Bool = false
+    var onQuickSave: (() -> Void)? = nil
     private let settings = SettingsService.shared
     private let registry = ProviderRegistry.shared
 
     var body: some View {
-        HStack(spacing: 12) {
-            // Provider picker dropdown — only shows configured providers
-            Menu {
-                ForEach(registry.configuredProviders, id: \.self) { p in
-                    Button {
-                        onProviderChange(p)
-                    } label: {
-                        HStack {
-                            Image(systemName: p.iconName)
-                            Text(p.displayName)
-                            if p == provider {
-                                Image(systemName: "checkmark")
-                            }
-                        }
-                    }
-                }
-            } label: {
-                HStack(spacing: 4) {
-                    Image(systemName: provider.iconName)
-                        .font(.system(size: settings.guiTextSize - 2))
-                    Text(provider.displayName)
-                        .font(.system(size: settings.guiTextSize - 2, weight: .medium))
-                    Image(systemName: "chevron.up.chevron.down")
-                        .font(.system(size: 8))
-                        .opacity(0.7)
-                }
-                .foregroundColor(.white)
-                .padding(.horizontal, 8)
-                .padding(.vertical, 4)
-                .background(Color.providerColor(provider))
-                .cornerRadius(4)
-            }
-            .menuStyle(.borderlessButton)
-            .fixedSize()
-            .help("Switch provider")
-
-            // Model name (clickable → model selector)
-            Button(action: onModelSelect) {
-                if let model = model {
-                    HStack(spacing: 6) {
-                        Text(model.name)
-                            .font(.system(size: settings.guiTextSize, weight: .medium))
-                            .foregroundColor(.oaiPrimary)
-
-                        // Capability badges
-                        HStack(spacing: 3) {
-                            if model.capabilities.vision {
-                                Image(systemName: "eye")
-                                    .font(.system(size: 9))
-                                    .foregroundColor(.oaiSecondary)
-                            }
-                            if model.capabilities.tools {
-                                Image(systemName: "wrench")
-                                    .font(.system(size: 9))
-                                    .foregroundColor(.oaiSecondary)
-                            }
-                            if model.capabilities.online {
-                                Image(systemName: "globe")
-                                    .font(.system(size: 9))
-                                    .foregroundColor(.oaiSecondary)
-                            }
-                            if model.capabilities.imageGeneration {
-                                Image(systemName: "paintbrush")
-                                    .font(.system(size: 9))
-                                    .foregroundColor(.oaiSecondary)
-                            }
-                        }
-
-                        Image(systemName: "chevron.down")
-                            .font(.caption2)
-                            .foregroundColor(.oaiSecondary)
-                    }
-                } else {
-                    HStack(spacing: 4) {
-                        Text("No model selected")
-                            .font(.system(size: settings.guiTextSize))
-                            .foregroundColor(.oaiSecondary)
-                        Image(systemName: "chevron.down")
-                            .font(.caption2)
-                            .foregroundColor(.oaiSecondary)
-                    }
-                }
-            }
-            .buttonStyle(.plain)
-            .help("Select model")
-
-            // Favourite star
-            if let model = model {
-                let isFav = settings.favoriteModelIds.contains(model.id)
-                Button(action: { settings.toggleFavoriteModel(model.id) }) {
-                    Image(systemName: isFav ? "star.fill" : "star")
-                        .font(.system(size: settings.guiTextSize - 3))
-                        .foregroundColor(isFav ? .yellow : .oaiSecondary)
-                }
-                .buttonStyle(.plain)
-                .help(isFav ? "Remove from favorites" : "Add to favorites")
+        ZStack {
+            // Left: provider + model + star
+            HStack(spacing: 12) {
+                providerMenu
+                modelButton
+                starButton
+                Spacer()
             }
 
-            Spacer()
+            // Center: conversation title (macOS document-title style)
+            conversationTitle
         }
         .padding(.horizontal, 16)
         .padding(.vertical, 8)
@@ -145,6 +60,119 @@ struct HeaderView: View {
             alignment: .bottom
         )
     }
+
+    // MARK: - Conversation title (center)
+
+    @ViewBuilder
+    private var conversationTitle: some View {
+        if let name = conversationName {
+            Button(action: { if hasUnsavedChanges { onQuickSave?() } }) {
+                HStack(spacing: 5) {
+                    if hasUnsavedChanges {
+                        Circle()
+                            .fill(Color.orange)
+                            .frame(width: 6, height: 6)
+                    }
+                    Text(name)
+                        .font(.system(size: settings.guiTextSize - 1, weight: .medium))
+                        .foregroundColor(.oaiPrimary)
+                        .lineLimit(1)
+                        .frame(maxWidth: 300)
+                }
+            }
+            .buttonStyle(.plain)
+            .disabled(!hasUnsavedChanges)
+            .help(hasUnsavedChanges ? "Unsaved changes — click to save" : "Saved")
+            .animation(.easeInOut(duration: 0.2), value: hasUnsavedChanges)
+            .animation(.easeInOut(duration: 0.2), value: name)
+        }
+    }
+
+    // MARK: - Subviews (extracted so ZStack stays readable)
+
+    private var providerMenu: some View {
+        Menu {
+            ForEach(registry.configuredProviders, id: \.self) { p in
+                Button {
+                    onProviderChange(p)
+                } label: {
+                    HStack {
+                        Image(systemName: p.iconName)
+                        Text(p.displayName)
+                        if p == provider { Image(systemName: "checkmark") }
+                    }
+                }
+            }
+        } label: {
+            HStack(spacing: 4) {
+                Image(systemName: provider.iconName)
+                    .font(.system(size: settings.guiTextSize - 2))
+                Text(provider.displayName)
+                    .font(.system(size: settings.guiTextSize - 2, weight: .medium))
+                Image(systemName: "chevron.up.chevron.down")
+                    .font(.system(size: 8))
+                    .opacity(0.7)
+            }
+            .foregroundColor(.white)
+            .padding(.horizontal, 8)
+            .padding(.vertical, 4)
+            .background(Color.providerColor(provider))
+            .cornerRadius(4)
+        }
+        .menuStyle(.borderlessButton)
+        .fixedSize()
+        .help("Switch provider")
+    }
+
+    private var modelButton: some View {
+        Button(action: onModelSelect) {
+            if let model = model {
+                HStack(spacing: 6) {
+                    Text(model.name)
+                        .font(.system(size: settings.guiTextSize, weight: .medium))
+                        .foregroundColor(.oaiPrimary)
+                    HStack(spacing: 3) {
+                        if model.capabilities.vision {
+                            Image(systemName: "eye").font(.system(size: 9)).foregroundColor(.oaiSecondary)
+                        }
+                        if model.capabilities.tools {
+                            Image(systemName: "wrench").font(.system(size: 9)).foregroundColor(.oaiSecondary)
+                        }
+                        if model.capabilities.online {
+                            Image(systemName: "globe").font(.system(size: 9)).foregroundColor(.oaiSecondary)
+                        }
+                        if model.capabilities.imageGeneration {
+                            Image(systemName: "paintbrush").font(.system(size: 9)).foregroundColor(.oaiSecondary)
+                        }
+                    }
+                    Image(systemName: "chevron.down").font(.caption2).foregroundColor(.oaiSecondary)
+                }
+            } else {
+                HStack(spacing: 4) {
+                    Text("No model selected")
+                        .font(.system(size: settings.guiTextSize))
+                        .foregroundColor(.oaiSecondary)
+                    Image(systemName: "chevron.down").font(.caption2).foregroundColor(.oaiSecondary)
+                }
+            }
+        }
+        .buttonStyle(.plain)
+        .help("Select model")
+    }
+
+    @ViewBuilder
+    private var starButton: some View {
+        if let model = model {
+            let isFav = settings.favoriteModelIds.contains(model.id)
+            Button(action: { settings.toggleFavoriteModel(model.id) }) {
+                Image(systemName: isFav ? "star.fill" : "star")
+                    .font(.system(size: settings.guiTextSize - 3))
+                    .foregroundColor(isFav ? .yellow : .oaiSecondary)
+            }
+            .buttonStyle(.plain)
+            .help(isFav ? "Remove from favorites" : "Add to favorites")
+        }
+    }
 }
 
 // MARK: - Status Pills (used by SidebarView)

oAI/Views/Main/InputBar.swift

@@ -44,7 +44,7 @@ struct InputBar: View {
 
     @State private var showCommandDropdown = false
     @State private var selectedSuggestionIndex: Int = 0
-    @FocusState private var isInputFocused: Bool
+    @State private var isInputFocused: Bool = false
 
     private static let minInputHeight: CGFloat = 56
     private static let maxInputHeight: CGFloat = 320
@@ -95,55 +95,50 @@ struct InputBar: View {
                     }
 
                     // Editor — fills the fixed-height box, bottom area reserved for globe
-                    TextEditor(text: $text)
-                        .font(.system(size: settings.inputTextSize))
-                        .foregroundColor(.oaiPrimary)
-                        .scrollContentBackground(.hidden)
-                        .padding(.horizontal, 8)
-                        .padding(.top, 6)
-                        .padding(.bottom, 30)
-                        .frame(maxWidth: .infinity, maxHeight: .infinity)
-                        .focused($isInputFocused)
-                        .onChange(of: text) {
-                            showCommandDropdown = text.hasPrefix("/")
-                            selectedSuggestionIndex = 0
-                        }
-                        #if os(macOS)
-                        .onKeyPress(.upArrow) {
-                            if showCommandDropdown && selectedSuggestionIndex > 0 {
-                                selectedSuggestionIndex -= 1
-                                return .handled
-                            }
-                            return .ignored
-                        }
-                        .onKeyPress(.downArrow) {
-                            if showCommandDropdown {
-                                let count = CommandSuggestionsView.filteredCommands(for: text).count
-                                if selectedSuggestionIndex < count - 1 {
-                                    selectedSuggestionIndex += 1
-                                    return .handled
-                                }
-                            }
-                            return .ignored
-                        }
-                        .onKeyPress(.escape) {
-                            if showCommandDropdown { showCommandDropdown = false; return .handled }
-                            if isGenerating { onCancel(); return .handled }
-                            return .ignored
-                        }
-                        .onKeyPress(.return, phases: .down) { press in
-                            if press.modifiers.contains(.shift) { return .ignored }
+                    NativeTextEditor(
+                        text: $text,
+                        font: .systemFont(ofSize: settings.inputTextSize),
+                        textColor: NSColor(Color.oaiPrimary),
+                        isFocused: isInputFocused,
+                        onReturn: {
                             if showCommandDropdown {
                                 let suggestions = CommandSuggestionsView.filteredCommands(for: text)
                                 if !suggestions.isEmpty && selectedSuggestionIndex < suggestions.count {
                                     selectCommand(suggestions[selectedSuggestionIndex].command)
-                                    return .handled
+                                    return true
                                 }
                             }
-                            if !text.isEmpty { onSend(); return .handled }
-                            return .handled
-                        }
-                        #endif
+                            if !text.isEmpty { onSend(); return true }
+                            return true
+                        },
+                        onEscape: {
+                            if showCommandDropdown { showCommandDropdown = false; return true }
+                            if isGenerating { onCancel(); return true }
+                            return false
+                        },
+                        onUpArrow: {
+                            if showCommandDropdown && selectedSuggestionIndex > 0 {
+                                selectedSuggestionIndex -= 1; return true
+                            }
+                            return false
+                        },
+                        onDownArrow: {
+                            if showCommandDropdown {
+                                let count = CommandSuggestionsView.filteredCommands(for: text).count
+                                if selectedSuggestionIndex < count - 1 {
+                                    selectedSuggestionIndex += 1; return true
+                                }
+                            }
+                            return false
+                        },
+                        onFocusChange: { focused in isInputFocused = focused }
+                    )
+                    .frame(maxWidth: .infinity, maxHeight: .infinity)
+                    .onChange(of: text) {
+                        showCommandDropdown = text.hasPrefix("/")
+                        selectedSuggestionIndex = 0
+                    }
+                    .padding(.bottom, 30)
 
                     // Online / offline toggle — bottom-left of the text box
                     VStack {

oAI/Views/Main/MarkdownContentView.swift

@@ -61,8 +61,15 @@ struct MarkdownContentView: View {
             .markdownBlockStyle(\.paragraph) { configuration in
                 configuration.label
                     .markdownMargin(top: 0, bottom: 8)
+                    // MarkdownUI builds mixed-style paragraphs (bold/italic runs alongside
+                    // plain text) as concatenated Text(+) segments, which on macOS report
+                    // their ideal (unwrapped, single-line) size instead of wrapping to the
+                    // width actually available — truncating with "…" mid-word. Forcing the
+                    // height to be recomputed for the given (flexible) width fixes it.
+                    .fixedSize(horizontal: false, vertical: true)
             }
             .textSelection(.enabled)
+            .frame(maxWidth: .infinity, alignment: .leading)
     }
 
     // MARK: - Parsing

oAI/Views/Main/MessageRow.swift

@@ -185,6 +185,7 @@ struct MessageRow: View {
                     .foregroundColor(.oaiSecondary)
                 }
             }
+            .frame(maxWidth: .infinity, alignment: .leading)
         }
         .padding(16)
         .background(Color.messageBackground(for: message.role))

oAI/Views/Main/NativeTextEditor.swift

@@ -0,0 +1,171 @@
+//
+//  NativeTextEditor.swift
+//  oAI
+//
+//  NSViewRepresentable text editor with correct Enter-key semantics:
+//  plain Enter → send, Shift+Enter or Cmd+Enter → newline.
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+
+import SwiftUI
+import AppKit
+
+struct NativeTextEditor: NSViewRepresentable {
+    @Binding var text: String
+    var font: NSFont
+    var textColor: NSColor
+    var isFocused: Bool
+
+    /// Plain Enter (no modifiers). Return true if the event was consumed.
+    var onReturn: () -> Bool
+    /// Escape key. Return true if consumed.
+    var onEscape: () -> Bool
+    /// Up arrow. Return true if consumed.
+    var onUpArrow: () -> Bool
+    /// Down arrow. Return true if consumed.
+    var onDownArrow: () -> Bool
+    /// Called when the view gains or loses first-responder status.
+    var onFocusChange: (Bool) -> Void
+
+    // MARK: - NSViewRepresentable
+
+    func makeNSView(context: Context) -> NSScrollView {
+        let scrollView = NSScrollView()
+        scrollView.hasVerticalScroller = false
+        scrollView.hasHorizontalScroller = false
+        scrollView.drawsBackground = false
+        scrollView.borderType = .noBorder
+
+        let tv = context.coordinator.textView
+        tv.delegate = context.coordinator
+        tv.isEditable = true
+        tv.isRichText = false
+        tv.drawsBackground = false
+        tv.backgroundColor = .clear
+        tv.isAutomaticQuoteSubstitutionEnabled = false
+        tv.isAutomaticDashSubstitutionEnabled = false
+        tv.isAutomaticSpellingCorrectionEnabled = true
+        tv.isContinuousSpellCheckingEnabled = true
+        tv.allowsUndo = true
+        tv.isVerticallyResizable = true
+        tv.isHorizontallyResizable = false
+        tv.autoresizingMask = [.width]
+        tv.textContainer?.widthTracksTextView = true
+        tv.textContainerInset = NSSize(width: 8, height: 6)
+
+        scrollView.documentView = tv
+        return scrollView
+    }
+
+    func updateNSView(_ scrollView: NSScrollView, context: Context) {
+        let tv = context.coordinator.textView
+        let coord = context.coordinator
+
+        // Update text only when it differs (avoids caret-jumping on every keystroke)
+        if tv.string != text {
+            let sel = tv.selectedRanges
+            tv.string = text
+            let len = (tv.string as NSString).length
+            tv.selectedRanges = sel.map { v in
+                let r = v.rangeValue
+                let loc = min(r.location, len)
+                let length = min(r.length, max(0, len - loc))
+                return NSValue(range: NSRange(location: loc, length: length))
+            }
+        }
+
+        if tv.font != font       { tv.font = font }
+        if tv.textColor != textColor { tv.textColor = textColor }
+
+        // Keep coordinator callbacks current with each SwiftUI render
+        coord.textBinding  = $text
+        coord.onReturn     = onReturn
+        coord.onEscape     = onEscape
+        coord.onUpArrow    = onUpArrow
+        coord.onDownArrow  = onDownArrow
+        coord.onFocusChange = onFocusChange
+
+        if isFocused {
+            DispatchQueue.main.async {
+                guard let window = tv.window, window.firstResponder !== tv else { return }
+                window.makeFirstResponder(tv)
+            }
+        }
+    }
+
+    func makeCoordinator() -> Coordinator { Coordinator() }
+
+    // MARK: - Coordinator
+
+    final class Coordinator: NSObject, NSTextViewDelegate {
+        let textView = KeyableNSTextView()
+
+        // Updated on every SwiftUI render via updateNSView
+        var textBinding:   Binding<String>?
+        var onReturn:      () -> Bool = { false }
+        var onEscape:      () -> Bool = { false }
+        var onUpArrow:     () -> Bool = { false }
+        var onDownArrow:   () -> Bool = { false }
+        var onFocusChange: (Bool) -> Void = { _ in }
+
+        override init() {
+            super.init()
+            textView.coordinator = self
+        }
+
+        func textDidChange(_ notification: Notification) {
+            guard let tv = notification.object as? NSTextView else { return }
+            textBinding?.wrappedValue = tv.string
+        }
+    }
+}
+
+// MARK: - KeyableNSTextView
+
+/// NSTextView that routes Return / Escape / arrow keys to the SwiftUI
+/// coordinator before the AppKit default handling runs.
+final class KeyableNSTextView: NSTextView {
+    weak var coordinator: NativeTextEditor.Coordinator?
+
+    override func keyDown(with event: NSEvent) {
+        guard let coord = coordinator else { super.keyDown(with: event); return }
+
+        let flags = event.modifierFlags.intersection(.deviceIndependentFlagsMask)
+        let shift = flags.contains(.shift)
+        let cmd   = flags.contains(.command)
+
+        switch event.keyCode {
+        case 36: // Return
+            if shift || cmd {
+                // Shift+Enter or Cmd+Enter → literal newline
+                insertNewlineIgnoringFieldEditor(nil)
+            } else {
+                // Plain Enter → let SwiftUI decide (send or select dropdown item)
+                if !coord.onReturn() {
+                    insertNewlineIgnoringFieldEditor(nil)
+                }
+            }
+        case 53: // Escape
+            if !coord.onEscape() { super.keyDown(with: event) }
+        case 126: // Up arrow
+            if !coord.onUpArrow() { super.keyDown(with: event) }
+        case 125: // Down arrow
+            if !coord.onDownArrow() { super.keyDown(with: event) }
+        default:
+            super.keyDown(with: event)
+        }
+    }
+
+    override func becomeFirstResponder() -> Bool {
+        let ok = super.becomeFirstResponder()
+        if ok { coordinator?.onFocusChange(true) }
+        return ok
+    }
+
+    override func resignFirstResponder() -> Bool {
+        let ok = super.resignFirstResponder()
+        if ok { coordinator?.onFocusChange(false) }
+        return ok
+    }
+}

oAI/Views/Screens/AgentSkillsView.swift

@@ -113,7 +113,9 @@ struct AgentSkillsView: View {
                             onToggle: { settings.toggleAgentSkill(id: skill.id) },
                             onEdit: { editContext = SkillEditContext(skill: skill) },
                             onExport: { exportOne(skill) },
-                            onDelete: { settings.deleteAgentSkill(id: skill.id) }
+                            onDelete: { settings.deleteAgentSkill(id: skill.id) },
+                            isTrusted: settings.trustSecondBrainSkill,
+                            onToggleTrust: { settings.trustSecondBrainSkill.toggle() }
                         )
                     }
                 }
@@ -349,6 +351,8 @@ private struct AgentSkillRow: View {
     let onEdit: () -> Void
     let onExport: () -> Void
     let onDelete: () -> Void
+    var isTrusted: Bool = false
+    var onToggleTrust: (() -> Void)? = nil
 
     private var fileCount: Int {
         AgentSkillFilesService.shared.listFiles(for: skill.id).count
@@ -378,6 +382,14 @@ private struct AgentSkillRow: View {
 
             Spacer()
 
+            // 2nd Brain: let the user mark bash calls to its helper script as always-trusted,
+            // skipping the bash approval dialog. Only shown for this specific skill while active.
+            if skill.isActive, skill.isSecondBrainSkill, let onToggleTrust {
+                Toggle("Trust", isOn: Binding(get: { isTrusted }, set: { _ in onToggleTrust() }))
+                    .toggleStyle(.switch).controlSize(.small)
+                    .help("When on, bash commands that call the 2nd Brain helper script run without asking for approval each time.")
+            }
+
             // File count badge
             if fileCount > 0 {
                 Label("^[\(fileCount) file](inflect: true)", systemImage: "doc")
@@ -479,7 +491,9 @@ struct AgentSkillsTabContent: View {
                             onToggle: { settings.toggleAgentSkill(id: skill.id) },
                             onEdit: { editContext = SkillEditContext(skill: skill) },
                             onExport: { exportOne(skill) },
-                            onDelete: { settings.deleteAgentSkill(id: skill.id) }
+                            onDelete: { settings.deleteAgentSkill(id: skill.id) },
+                            isTrusted: settings.trustSecondBrainSkill,
+                            onToggleTrust: { settings.trustSecondBrainSkill.toggle() }
                         )
                         if idx < settings.agentSkills.count - 1 { Divider() }
                     }

oAI/Views/Screens/CombineConversationsSheet.swift

@@ -0,0 +1,192 @@
+//
+//  CombineConversationsSheet.swift
+//  oAI
+//
+//  Combine 2+ saved conversations into one, optionally using AI to merge content
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+//
+// This file is part of oAI.
+//
+// oAI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// oAI is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
+// Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public
+// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
+
+
+import SwiftUI
+
+struct CombineConversationsSheet: View {
+    @Environment(\.dismiss) var dismiss
+
+    let conversations: [Conversation]
+    var onCompleted: (Conversation) -> Void
+
+    @State private var name: String
+    @State private var mode: CombineMode = .simple
+    @State private var deleteOriginals = false
+    @State private var isProcessing = false
+    @State private var errorMessage: String?
+
+    private let settings = SettingsService.shared
+
+    init(conversations: [Conversation], onCompleted: @escaping (Conversation) -> Void) {
+        self.conversations = conversations
+        self.onCompleted = onCompleted
+        let joined = conversations.map(\.name).joined(separator: " + ")
+        _name = State(initialValue: String(joined.prefix(80)))
+    }
+
+    private var defaultModelLabel: String? {
+        guard let model = settings.defaultModel, !model.isEmpty else { return nil }
+        return "\(settings.defaultProvider.displayName) / \(model)"
+    }
+
+    private var isValid: Bool {
+        !name.trimmingCharacters(in: .whitespaces).isEmpty
+            && conversations.count >= 2
+            && (mode == .simple || defaultModelLabel != nil)
+    }
+
+    var body: some View {
+        VStack(spacing: 0) {
+            HStack {
+                Text("Combine Conversations")
+                    .font(.system(size: 18, weight: .bold))
+                Spacer()
+                Button { dismiss() } label: {
+                    Image(systemName: "xmark.circle.fill")
+                        .font(.title2).foregroundStyle(.secondary)
+                }
+                .buttonStyle(.plain)
+                .keyboardShortcut(.escape, modifiers: [])
+                .disabled(isProcessing)
+            }
+            .padding(.horizontal, 24).padding(.top, 20).padding(.bottom, 16)
+
+            Divider()
+
+            ScrollView {
+                VStack(alignment: .leading, spacing: 16) {
+                    VStack(alignment: .leading, spacing: 6) {
+                        Text("Combining \(conversations.count) conversations").font(.system(size: 13, weight: .semibold))
+                        VStack(alignment: .leading, spacing: 4) {
+                            ForEach(conversations) { conversation in
+                                Label("\(conversation.name) (\(conversation.messageCount) messages)", systemImage: "bubble.left.and.bubble.right")
+                                    .font(.system(size: 12))
+                                    .foregroundStyle(.secondary)
+                            }
+                        }
+                    }
+
+                    VStack(alignment: .leading, spacing: 6) {
+                        Text("New conversation name").font(.system(size: 13, weight: .semibold))
+                        TextField("Name", text: $name)
+                            .textFieldStyle(.roundedBorder)
+                            .disabled(isProcessing)
+                    }
+
+                    VStack(alignment: .leading, spacing: 8) {
+                        Text("Merge method").font(.system(size: 13, weight: .semibold))
+                        Picker("", selection: $mode) {
+                            Text("Simple Merge").tag(CombineMode.simple)
+                            Text("AI-Assisted Merge").tag(CombineMode.ai)
+                        }
+                        .pickerStyle(.segmented)
+                        .labelsHidden()
+                        .disabled(isProcessing)
+
+                        if mode == .simple {
+                            Text("Messages from all selected conversations are combined in chronological order.")
+                                .font(.caption).foregroundStyle(.secondary)
+                        } else {
+                            Text("A model reads all the source messages and rewrites them into one coherent, de-duplicated conversation.")
+                                .font(.caption).foregroundStyle(.secondary)
+                            if let label = defaultModelLabel {
+                                Label("Uses your default model: \(label)", systemImage: "cpu")
+                                    .font(.caption).foregroundStyle(.secondary)
+                            } else {
+                                Label("No default model configured — set one in Settings → General.", systemImage: "exclamationmark.triangle.fill")
+                                    .font(.caption).foregroundStyle(.orange)
+                            }
+                        }
+                    }
+
+                    Toggle("Delete original conversations after combining", isOn: $deleteOriginals)
+                        .toggleStyle(.checkbox)
+                        .disabled(isProcessing)
+
+                    if let errorMessage {
+                        HStack(alignment: .top, spacing: 8) {
+                            Image(systemName: "xmark.octagon.fill").foregroundStyle(.red)
+                            Text(errorMessage).font(.caption)
+                        }
+                        .padding(10)
+                        .background(.red.opacity(0.08), in: RoundedRectangle(cornerRadius: 8))
+                    }
+                }
+                .padding(.horizontal, 24).padding(.vertical, 16)
+            }
+
+            Divider()
+
+            HStack {
+                Button("Cancel") { dismiss() }
+                    .buttonStyle(.bordered)
+                    .disabled(isProcessing)
+                Spacer()
+                if isProcessing {
+                    ProgressView().controlSize(.small)
+                    Text("Combining…").font(.caption).foregroundStyle(.secondary)
+                }
+                Button("Combine") {
+                    combine()
+                }
+                .buttonStyle(.borderedProminent)
+                .disabled(!isValid || isProcessing)
+                .keyboardShortcut(.return, modifiers: [.command])
+            }
+            .padding(.horizontal, 24).padding(.vertical, 12)
+        }
+        .frame(minWidth: 520, idealWidth: 560, minHeight: 460, idealHeight: 520)
+    }
+
+    private func combine() {
+        isProcessing = true
+        errorMessage = nil
+        let ids = conversations.map(\.id)
+        let trimmedName = name.trimmingCharacters(in: .whitespaces)
+        let selectedMode = mode
+        let shouldDeleteOriginals = deleteOriginals
+
+        Task {
+            do {
+                let newConversation = try await ConversationMergeService.merge(
+                    conversationIds: ids,
+                    name: trimmedName,
+                    mode: selectedMode,
+                    deleteOriginals: shouldDeleteOriginals
+                )
+                await MainActor.run {
+                    isProcessing = false
+                    onCompleted(newConversation)
+                    dismiss()
+                }
+            } catch {
+                await MainActor.run {
+                    isProcessing = false
+                    errorMessage = error.localizedDescription
+                }
+            }
+        }
+    }
+}

oAI/Views/Screens/ConversationListView.swift

@@ -36,6 +36,7 @@ struct ConversationListView: View {
     @State private var semanticResults: [Conversation] = []
     @State private var isSearching = false
     @State private var selectedIndex: Int = 0
+    @State private var showCombineSheet = false
     @FocusState private var searchFocused: Bool
     private let settings = SettingsService.shared
     var onLoad: ((Conversation) -> Void)?
@@ -70,6 +71,18 @@ struct ConversationListView: View {
                     }
                     .buttonStyle(.plain)
 
+                    if selectedConversations.count >= 2 {
+                        Button {
+                            showCombineSheet = true
+                        } label: {
+                            HStack(spacing: 4) {
+                                Image(systemName: "arrow.triangle.merge")
+                                Text("Combine (\(selectedConversations.count))")
+                            }
+                        }
+                        .buttonStyle(.plain)
+                    }
+
                     if !selectedConversations.isEmpty {
                         Button(role: .destructive) {
                             deleteSelected()
@@ -298,6 +311,16 @@ struct ConversationListView: View {
             searchFocused = true
         }
         .frame(minWidth: 700, idealWidth: 800, minHeight: 500, idealHeight: 600)
+        .sheet(isPresented: $showCombineSheet) {
+            CombineConversationsSheet(
+                conversations: conversations.filter { selectedConversations.contains($0.id) },
+                onCompleted: { _ in
+                    loadConversations()
+                    selectedConversations.removeAll()
+                    isSelecting = false
+                }
+            )
+        }
     }
 
     private func loadConversations() {

oAI/Views/Screens/CreditsView.swift

@@ -80,17 +80,6 @@ struct CreditsView: View {
                             .font(.system(size: 40))
                             .foregroundColor(.green)
                             .padding(.top)
-
-                    case .appleOnDevice:
-                        Text("Apple Intelligence")
-                            .font(.headline)
-                        Text("On-device and free — no credits or API key needed.")
-                            .font(.body)
-                            .foregroundColor(.secondary)
-                        Image(systemName: "apple.logo")
-                            .font(.system(size: 40))
-                            .foregroundColor(.secondary)
-                            .padding(.top)
                     }
                 }
 

oAI/Views/Screens/HelpView.swift

@@ -52,7 +52,7 @@ private let helpCategories: [CommandCategory] = [
             brief: "View command history",
             detail: "Opens a searchable modal showing all your previous messages with timestamps in European format (dd.MM.yyyy HH:mm:ss). Search by text content or date to find specific messages. Click any entry to reuse it.",
             examples: ["/history"],
-            shortcut: "⌘H"
+            shortcut: "⇧⌘H"
         ),
         CommandDetail(
             command: "/clear",

oAI/Views/Screens/ModelInfoView.swift

@@ -30,6 +30,7 @@ struct ModelInfoView: View {
 
     @Environment(\.dismiss) var dismiss
     @Bindable private var settings = SettingsService.shared
+    @State private var isDescriptionExpanded = false
 
     var body: some View {
         VStack(spacing: 0) {
@@ -78,8 +79,18 @@ struct ModelInfoView: View {
                             Text(desc)
                                 .font(.body)
                                 .foregroundColor(.primary)
-                                .fixedSize(horizontal: false, vertical: true)
+                                .lineLimit(isDescriptionExpanded ? nil : 4)
                                 .textSelection(.enabled)
+                            if desc.count > 250 {
+                                Button(isDescriptionExpanded ? "Less" : "More…") {
+                                    withAnimation(.easeInOut(duration: 0.2)) {
+                                        isDescriptionExpanded.toggle()
+                                    }
+                                }
+                                .font(.callout)
+                                .foregroundStyle(.blue)
+                                .buttonStyle(.plain)
+                            }
                         }
                         .padding(.leading, 4)
                     }

oAI/Views/Screens/PersonalDataApprovalSheet.swift

@@ -0,0 +1,97 @@
+//
+//  PersonalDataApprovalSheet.swift
+//  oAI
+//
+//  Approval UI for AI-requested Calendar/Reminders write actions
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+//
+// This file is part of oAI.
+//
+// oAI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// oAI is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
+// Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public
+// License along with oAI. If not, see <https://www.gnu.org/licenses/>.
+
+
+import SwiftUI
+
+struct PersonalDataApprovalSheet: View {
+    let pending: MCPService.PendingPersonalDataAction
+    let onApprove: (_ forSession: Bool) -> Void
+    let onDeny: () -> Void
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 20) {
+            // Header
+            HStack(spacing: 12) {
+                Image(systemName: "calendar.badge.exclamationmark")
+                    .font(.title2)
+                    .foregroundStyle(.orange)
+                VStack(alignment: .leading, spacing: 2) {
+                    Text("Allow This Action?")
+                        .font(.system(size: 17, weight: .semibold))
+                    Text("The AI wants to make a change to your calendar or reminders")
+                        .font(.system(size: 13))
+                        .foregroundStyle(.secondary)
+                }
+                Spacer()
+            }
+
+            // Action description
+            VStack(alignment: .leading, spacing: 6) {
+                Text("ACTION")
+                    .font(.system(size: 11, weight: .medium))
+                    .foregroundStyle(.secondary)
+                Text(pending.summary)
+                    .font(.system(size: 13))
+                    .foregroundStyle(.primary)
+                    .frame(maxWidth: .infinity, alignment: .leading)
+                    .textSelection(.enabled)
+                    .padding(12)
+                    .background(Color.secondary.opacity(0.08))
+                    .clipShape(RoundedRectangle(cornerRadius: 8))
+                    .overlay(
+                        RoundedRectangle(cornerRadius: 8)
+                            .stroke(Color.secondary.opacity(0.2), lineWidth: 1)
+                    )
+            }
+
+            // Buttons
+            HStack(spacing: 8) {
+                Button("Deny") {
+                    onDeny()
+                }
+                .buttonStyle(.bordered)
+                .tint(.red)
+                .keyboardShortcut(.escape, modifiers: [])
+
+                Spacer()
+
+                Button("Allow Once") {
+                    onApprove(false)
+                }
+                .buttonStyle(.bordered)
+                .tint(.orange)
+
+                Button("Allow for Session") {
+                    onApprove(true)
+                }
+                .buttonStyle(.borderedProminent)
+                .tint(.orange)
+                .keyboardShortcut(.return, modifiers: [])
+            }
+        }
+        .padding(24)
+        .frame(width: 480)
+    }
+}

oAI/Views/Screens/SettingsView.swift

@@ -25,7 +25,6 @@
 
 import SwiftUI
 import UniformTypeIdentifiers
-import FoundationModels
 
 struct SettingsView: View {
     @Environment(\.dismiss) var dismiss
@@ -76,6 +75,20 @@ struct SettingsView: View {
     // Default model picker state
     @State private var showDefaultModelPicker = false
 
+    // External MCP Servers state
+    @State private var showAddExternalMCPServer = false
+    @State private var newMCPServerName = ""
+    @State private var newMCPServerCommand = ""
+    @State private var newMCPServerArgs = ""
+    @State private var newMCPServerTimeout: Double = 30
+    private var externalMCPManager = ExternalMCPManager.shared
+
+    // Personal Data state (Calendar/Reminders/Contacts/Location/Maps)
+    @State private var calendarAccessState = EventKitService.shared.calendarAccessState
+    @State private var remindersAccessState = EventKitService.shared.reminderAccessState
+    @State private var contactsAccessState = ContactsService.shared.accessState
+    @State private var locationAccessState = LocationMapsService.shared.accessState
+
     // Paperless-NGX state
     @State private var paperlessURL = ""
     @State private var paperlessToken = ""
@@ -307,29 +320,6 @@ It's better to admit "I need more information" or "I cannot do that" than to fak
             }
         }
 
-        // Apple Intelligence
-        VStack(alignment: .leading, spacing: 6) {
-            sectionHeader("Apple Intelligence")
-            formSection {
-                row("Status") {
-                    appleIntelligenceStatusBadge
-                }
-                rowDivider()
-                row("Model") {
-                    Text("On-Device (4K context)")
-                        .foregroundStyle(.secondary)
-                }
-                rowDivider()
-                row("") {
-                    Button("Open Apple Intelligence Settings") {
-                        if let url = URL(string: "x-apple.systempreferences:com.apple.preference.aisettings") {
-                            NSWorkspace.shared.open(url)
-                        }
-                    }
-                }
-            }
-        }
-
         // Features
         VStack(alignment: .leading, spacing: 6) {
             sectionHeader("Features")
@@ -776,6 +766,367 @@ It's better to admit "I need more information" or "I cannot do that" than to fak
                 .padding(.horizontal, 4)
             }
         }
+
+        // MARK: Research Agents
+        Divider()
+
+        VStack(alignment: .leading, spacing: 8) {
+            HStack(spacing: 8) {
+                Image(systemName: "person.3.fill")
+                    .font(.title2)
+                    .foregroundStyle(.indigo)
+                Text("Research Agents")
+                    .font(.system(size: 18, weight: .semibold))
+            }
+            Text("Let the AI spawn read-only research sub-agents to investigate multiple things in parallel (read files, list/search directories, search the web — no writing, no bash). Intended for genuinely independent research tasks, not everyday questions.")
+                .font(.system(size: 14))
+                .foregroundStyle(.secondary)
+                .fixedSize(horizontal: false, vertical: true)
+        }
+        .padding(.bottom, 4)
+
+        VStack(alignment: .leading, spacing: 6) {
+            sectionHeader("Status")
+            formSection {
+                row("Enable Research Agents") {
+                    Toggle("", isOn: $settingsService.agentsEnabled)
+                        .toggleStyle(.switch)
+                }
+            }
+        }
+
+        HStack(alignment: .top, spacing: 6) {
+            Image(systemName: "exclamationmark.triangle.fill")
+                .font(.system(size: 12))
+                .foregroundStyle(.orange)
+                .padding(.top, 1)
+            Text("Cost warning: each sub-agent runs its own full chain of model calls. A single request that spawns several agents can cost several times a normal reply. The AI is instructed to only use this for genuinely parallel research, but model behavior can vary — leave this off unless you want that tradeoff.")
+                .font(.system(size: 13))
+                .foregroundStyle(.secondary)
+                .fixedSize(horizontal: false, vertical: true)
+        }
+        .padding(.horizontal, 4)
+
+        if settingsService.agentsEnabled {
+            VStack(alignment: .leading, spacing: 6) {
+                sectionHeader("Settings")
+                formSection {
+                    row("Max Concurrent Agents") {
+                        HStack(spacing: 8) {
+                            Stepper("", value: $settingsService.maxConcurrentAgents, in: 1...5)
+                                .labelsHidden()
+                            Text("\(settingsService.maxConcurrentAgents)")
+                                .font(.system(size: 13))
+                                .foregroundStyle(.secondary)
+                                .frame(width: 24, alignment: .trailing)
+                        }
+                    }
+                }
+            }
+        }
+
+        // MARK: External MCP Servers
+        Divider()
+        externalMCPSection
+
+        // MARK: Personal Data
+        // isHiddenPendingAppleFix hides the entire section (macOS 27 beta TCC bug).
+        // isContactsHiddenPendingAppleFix hides just the Contacts row (still broken in beta 2
+        // under hardened runtime while Calendar/Reminders/Location are fixed). Flip each flag
+        // to false once Apple ships a fix.
+        if !PersonalDataTools.isHiddenPendingAppleFix {
+        Divider()
+
+        VStack(alignment: .leading, spacing: 8) {
+            HStack(spacing: 8) {
+                Image(systemName: "person.crop.circle.badge.checkmark")
+                    .font(.title2)
+                    .foregroundStyle(.teal)
+                Text("Personal Data")
+                    .font(.system(size: 18, weight: .semibold))
+                if PersonalDataTools.isContactsHiddenPendingAppleFix {
+                    Text("β")
+                        .font(.system(size: 11, weight: .bold))
+                        .foregroundStyle(.orange)
+                        .padding(.horizontal, 5)
+                        .padding(.vertical, 2)
+                        .background(Color.orange.opacity(0.15))
+                        .clipShape(RoundedRectangle(cornerRadius: 4))
+                        .help("Beta Feature. May change.")
+                }
+            }
+            Text("Let the AI access your Calendar, Reminders, and Location & Maps to answer questions about your schedule and surroundings. Each service is opt-in and uses standard macOS permission prompts. This functionality is in beta and may change.")
+                .font(.system(size: 14))
+                .foregroundStyle(.secondary)
+                .fixedSize(horizontal: false, vertical: true)
+        }
+        .padding(.bottom, 4)
+        .onAppear {
+            // Permission status can change outside the app (System Settings, or a prior
+            // request elsewhere) — re-read it fresh every time this tab appears rather than
+            // trusting the one-time @State initializer.
+            calendarAccessState = EventKitService.shared.calendarAccessState
+            remindersAccessState = EventKitService.shared.reminderAccessState
+            contactsAccessState = ContactsService.shared.accessState
+            locationAccessState = LocationMapsService.shared.accessState
+        }
+
+        VStack(alignment: .leading, spacing: 6) {
+            sectionHeader("Services")
+            formSection {
+                personalDataRow(
+                    title: "Calendar",
+                    isEnabled: $settingsService.calendarEnabled,
+                    state: calendarAccessState,
+                    systemSettingsAnchor: "Privacy_Calendars",
+                    requestAccess: { calendarAccessState = await EventKitService.shared.requestCalendarAccess() ? .granted : EventKitService.shared.calendarAccessState }
+                )
+                rowDivider()
+                personalDataRow(
+                    title: "Reminders",
+                    isEnabled: $settingsService.remindersEnabled,
+                    state: remindersAccessState,
+                    systemSettingsAnchor: "Privacy_Reminders",
+                    requestAccess: { remindersAccessState = await EventKitService.shared.requestReminderAccess() ? .granted : EventKitService.shared.reminderAccessState }
+                )
+                rowDivider()
+                if !PersonalDataTools.isContactsHiddenPendingAppleFix {
+                    personalDataRow(
+                        title: "Contacts",
+                        isEnabled: $settingsService.contactsEnabled,
+                        state: contactsAccessState,
+                        systemSettingsAnchor: "Privacy_Contacts",
+                        requestAccess: { contactsAccessState = await ContactsService.shared.requestAccess() ? .granted : ContactsService.shared.accessState }
+                    )
+                    rowDivider()
+                }
+                personalDataRow(
+                    title: "Location & Maps",
+                    isEnabled: $settingsService.locationMapsEnabled,
+                    state: locationAccessState,
+                    systemSettingsAnchor: "Privacy_LocationServices",
+                    requestAccess: { locationAccessState = await LocationMapsService.shared.requestAccess() ? .granted : LocationMapsService.shared.accessState }
+                )
+            }
+        }
+
+        if settingsService.calendarEnabled || settingsService.remindersEnabled {
+            VStack(alignment: .leading, spacing: 6) {
+                sectionHeader("Write Actions")
+                formSection {
+                    row("Require Approval for Changes") {
+                        Toggle("", isOn: $settingsService.personalDataRequireApproval)
+                            .toggleStyle(.switch)
+                    }
+                }
+            }
+            Text("Creating calendar events or reminders, and completing reminders, will ask for your approval first.")
+                .font(.system(size: 13))
+                .foregroundStyle(.secondary)
+                .fixedSize(horizontal: false, vertical: true)
+                .padding(.horizontal, 4)
+        }
+        }
+    }
+
+    // MARK: - External MCP Servers Section
+
+    @ViewBuilder
+    private var externalMCPSection: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            HStack(spacing: 8) {
+                Image(systemName: "server.rack")
+                    .font(.title2)
+                    .foregroundStyle(.purple)
+                Text("External MCP Servers")
+                    .font(.system(size: 18, weight: .semibold))
+            }
+            Text("Connect any stdio MCP server (e.g. safaridriver --mcp) to give the AI access to its tools. Tool names are prefixed with the server slug.")
+                .font(.system(size: 14))
+                .foregroundStyle(.secondary)
+                .fixedSize(horizontal: false, vertical: true)
+        }
+        .padding(.bottom, 4)
+
+        VStack(alignment: .leading, spacing: 6) {
+            sectionHeader("Configured Servers")
+            formSection {
+                if settingsService.externalMCPServers.isEmpty {
+                    VStack(spacing: 8) {
+                        Image(systemName: "server.rack")
+                            .font(.system(size: 32))
+                            .foregroundStyle(.tertiary)
+                        Text("No external servers configured")
+                            .font(.system(size: 14, weight: .medium))
+                            .foregroundStyle(.secondary)
+                        Text("Add a server below, e.g.: safaridriver --mcp")
+                            .font(.system(size: 12))
+                            .foregroundStyle(.tertiary)
+                    }
+                    .frame(maxWidth: .infinity)
+                    .padding(.vertical, 20)
+                } else {
+                    ForEach(settingsService.externalMCPServers) { server in
+                        HStack(spacing: 10) {
+                            Circle()
+                                .fill(mcpStatusColor(externalMCPManager.clientStates[server.id]))
+                                .frame(width: 8, height: 8)
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text(server.name)
+                                    .font(.system(size: 14))
+                                Text(([server.command] + server.args).joined(separator: " "))
+                                    .font(.system(size: 11, design: .monospaced))
+                                    .foregroundStyle(.secondary)
+                                    .lineLimit(1)
+                            }
+                            Spacer()
+                            Text(mcpStatusLabel(externalMCPManager.clientStates[server.id]))
+                                .font(.system(size: 11))
+                                .foregroundStyle(.secondary)
+                            Toggle("", isOn: Binding(
+                                get: { server.isEnabled },
+                                set: { _ in settingsService.toggleExternalMCPServer(id: server.id) }
+                            ))
+                            .toggleStyle(.switch)
+                            .labelsHidden()
+                            Button {
+                                settingsService.deleteExternalMCPServer(id: server.id)
+                            } label: {
+                                Image(systemName: "trash.fill")
+                                    .foregroundStyle(.red)
+                                    .font(.system(size: 13))
+                            }
+                            .buttonStyle(.plain)
+                        }
+                        .padding(.horizontal, 16)
+                        .padding(.vertical, 10)
+                        if server.id != settingsService.externalMCPServers.last?.id {
+                            rowDivider()
+                        }
+                    }
+                }
+            }
+
+            Button {
+                newMCPServerName = ""
+                newMCPServerCommand = ""
+                newMCPServerArgs = ""
+                newMCPServerTimeout = 30
+                showAddExternalMCPServer = true
+            } label: {
+                Label("Add Server…", systemImage: "plus")
+                    .font(.system(size: 13, weight: .medium))
+                    .foregroundStyle(.white)
+                    .padding(.horizontal, 14)
+                    .padding(.vertical, 7)
+                    .background(Color.purple)
+                    .clipShape(RoundedRectangle(cornerRadius: 8))
+            }
+            .buttonStyle(.plain)
+        }
+        .sheet(isPresented: $showAddExternalMCPServer) {
+            addExternalMCPServerSheet
+        }
+    }
+
+    @ViewBuilder
+    private var addExternalMCPServerSheet: some View {
+        VStack(alignment: .leading, spacing: 20) {
+            Text("Add External MCP Server")
+                .font(.system(size: 16, weight: .semibold))
+                .frame(maxWidth: .infinity, alignment: .center)
+
+            formSection {
+                row("Name") {
+                    TextField("Safari", text: $newMCPServerName)
+                        .textFieldStyle(.roundedBorder)
+                        .frame(width: 240)
+                }
+                rowDivider()
+                row("Command") {
+                    TextField("safaridriver", text: $newMCPServerCommand)
+                        .textFieldStyle(.roundedBorder)
+                        .font(.system(size: 13, design: .monospaced))
+                        .frame(width: 240)
+                }
+                rowDivider()
+                row("Arguments") {
+                    TextField("--mcp", text: $newMCPServerArgs)
+                        .textFieldStyle(.roundedBorder)
+                        .font(.system(size: 13, design: .monospaced))
+                        .frame(width: 240)
+                        .help("Space-separated arguments")
+                }
+                rowDivider()
+                row("Timeout") {
+                    HStack(spacing: 8) {
+                        Stepper("", value: $newMCPServerTimeout, in: 5...120, step: 5)
+                            .labelsHidden()
+                        Text("\(Int(newMCPServerTimeout))s")
+                            .font(.system(size: 13))
+                            .foregroundStyle(.secondary)
+                            .frame(width: 32, alignment: .leading)
+                    }
+                }
+            }
+
+            if !newMCPServerName.isEmpty {
+                let slug = ExternalMCPServer.makeSlug(from: newMCPServerName)
+                HStack(spacing: 6) {
+                    Text("Tool prefix:")
+                        .font(.system(size: 12))
+                        .foregroundStyle(.secondary)
+                    Text("\(slug)_")
+                        .font(.system(size: 12, design: .monospaced))
+                        .foregroundStyle(.secondary)
+                }
+                if ExternalMCPServer.reservedSlugs.contains(slug) {
+                    Text("'\(slug)' is a reserved prefix. Choose a different name.")
+                        .font(.system(size: 12))
+                        .foregroundStyle(.red)
+                }
+            }
+
+            HStack {
+                Button("Cancel") { showAddExternalMCPServer = false }
+                Spacer()
+                Button("Add") {
+                    let args = ExternalMCPServer.parseArguments(newMCPServerArgs)
+                    let server = ExternalMCPServer(
+                        name: newMCPServerName,
+                        command: newMCPServerCommand,
+                        args: args,
+                        timeout: newMCPServerTimeout
+                    )
+                    settingsService.addExternalMCPServer(server)
+                    showAddExternalMCPServer = false
+                }
+                .buttonStyle(.borderedProminent)
+                .disabled(newMCPServerName.isEmpty || newMCPServerCommand.isEmpty ||
+                          ExternalMCPServer.reservedSlugs.contains(ExternalMCPServer.makeSlug(from: newMCPServerName)))
+            }
+        }
+        .padding(24)
+        .frame(minWidth: 460, minHeight: 320)
+    }
+
+    private func mcpStatusColor(_ state: MCPClientState?) -> Color {
+        switch state {
+        case .ready:           return .green
+        case .connecting:      return .orange
+        case .error, .crashed: return .red
+        default:               return Color(nsColor: .tertiaryLabelColor)
+        }
+    }
+
+    private func mcpStatusLabel(_ state: MCPClientState?) -> LocalizedStringKey {
+        switch state {
+        case .ready:      return "Connected"
+        case .connecting: return "Connecting…"
+        case .error:      return "Error"
+        case .crashed:    return "Crashed"
+        default:          return "Not started"
+        }
     }
 
     // MARK: - Appearance Tab
@@ -2470,6 +2821,57 @@ It's better to admit "I need more information" or "I cannot do that" than to fak
         Divider().padding(.leading, 16)
     }
 
+    @ViewBuilder
+    private func personalDataRow(title: LocalizedStringKey, isEnabled: Binding<Bool>, state: PersonalDataAccessState, systemSettingsAnchor: String, requestAccess: @escaping () async -> Void) -> some View {
+        VStack(alignment: .leading, spacing: 6) {
+            HStack(alignment: .center, spacing: 12) {
+                Text(title).font(.system(size: 14))
+                Spacer()
+                Toggle("", isOn: isEnabled)
+                    .toggleStyle(.switch)
+            }
+            if isEnabled.wrappedValue {
+                HStack(spacing: 6) {
+                    Image(systemName: state == .granted ? "checkmark.circle.fill" : (state == .denied ? "exclamationmark.circle.fill" : "circle"))
+                        .foregroundStyle(state == .granted ? .green : (state == .denied ? .orange : .secondary))
+                        .font(.system(size: 12))
+                    Text(statusText(for: state))
+                        .font(.system(size: 12))
+                        .foregroundStyle(.secondary)
+                    Spacer()
+                    if state == .notDetermined {
+                        Button("Request Access") {
+                            Task { await requestAccess() }
+                        }
+                        .buttonStyle(.bordered)
+                        .controlSize(.small)
+                    } else if state == .denied {
+                        Button("Open System Settings") {
+                            openPrivacySettings(anchor: systemSettingsAnchor)
+                        }
+                        .buttonStyle(.bordered)
+                        .controlSize(.small)
+                    }
+                }
+            }
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 10)
+    }
+
+    private func statusText(for state: PersonalDataAccessState) -> LocalizedStringKey {
+        switch state {
+        case .granted: return "Access granted"
+        case .denied: return "Access denied — enable in System Settings"
+        case .notDetermined: return "Access not granted"
+        }
+    }
+
+    private func openPrivacySettings(anchor: String) {
+        guard let url = URL(string: "x-apple.systempreferences:com.apple.preference.security?\(anchor)") else { return }
+        NSWorkspace.shared.open(url)
+    }
+
     private func abbreviatePath(_ path: String) -> String {
         let home = NSHomeDirectory()
         if path.hasPrefix(home) {
@@ -2673,28 +3075,6 @@ It's better to admit "I need more information" or "I cannot do that" than to fak
         formatter.unitsStyle = .full
         return formatter.localizedString(for: date, relativeTo: .now)
     }
-
-    @ViewBuilder
-    private var appleIntelligenceStatusBadge: some View {
-        let availability = SystemLanguageModel.default.availability
-        switch availability {
-        case .available:
-            Label("Available", systemImage: "checkmark.circle.fill")
-                .foregroundStyle(.green)
-        case .unavailable(.deviceNotEligible):
-            Label("Not supported on this Mac", systemImage: "xmark.circle.fill")
-                .foregroundStyle(.red)
-        case .unavailable(.appleIntelligenceNotEnabled):
-            Label("Not enabled — open Apple Intelligence Settings", systemImage: "exclamationmark.circle.fill")
-                .foregroundStyle(.orange)
-        case .unavailable(.modelNotReady):
-            Label("Model downloading…", systemImage: "arrow.down.circle.fill")
-                .foregroundStyle(.orange)
-        default:
-            Label("Unavailable", systemImage: "questionmark.circle.fill")
-                .foregroundStyle(.secondary)
-        }
-    }
 }
 
 #Preview {

oAI/oAI-InfoPlist.xcstrings

@@ -36,6 +36,54 @@
           }
         }
       }
+    },
+    "NSCalendarsFullAccessUsageDescription" : {
+      "comment" : "Privacy - Calendars Full Access Usage Description",
+      "extractionState" : "extracted_with_value",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "oAI can read and create calendar events when you ask it to, if you enable Calendar access in Settings."
+          }
+        }
+      }
+    },
+    "NSContactsUsageDescription" : {
+      "comment" : "Privacy - Contacts Usage Description",
+      "extractionState" : "extracted_with_value",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "oAI can search your contacts when you ask it to, if you enable Contacts access in Settings."
+          }
+        }
+      }
+    },
+    "NSLocationWhenInUseUsageDescription" : {
+      "comment" : "Privacy - Location When In Use Usage Description",
+      "extractionState" : "extracted_with_value",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "oAI can use your current location to answer questions, if you enable Location & Maps access in Settings."
+          }
+        }
+      }
+    },
+    "NSRemindersFullAccessUsageDescription" : {
+      "comment" : "Privacy - Reminders Full Access Usage Description",
+      "extractionState" : "extracted_with_value",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "oAI can read and create reminders when you ask it to, if you enable Reminders access in Settings."
+          }
+        }
+      }
     }
   },
   "version" : "1.1"

oAI/oAI.entitlements

@@ -8,5 +8,13 @@
 	<true/>
 	<key>com.apple.security.network.server</key>
 	<false/>
+	<key>com.apple.security.personal-information.calendars</key>
+	<true/>
+	<key>com.apple.security.personal-information.reminders</key>
+	<true/>
+	<key>com.apple.security.personal-information.contacts</key>
+	<true/>
+	<key>com.apple.security.personal-information.location</key>
+	<true/>
 </dict>
 </plist>

oAI/oAIApp.swift

@@ -37,6 +37,9 @@ struct oAIApp: App {
         // Start email handler on app launch
         EmailHandlerService.shared.start()
 
+        // Start external MCP servers
+        Task { @MainActor in ExternalMCPManager.shared.startAll() }
+
         // Sync Git changes on app launch (pull + import)
         Task {
             await GitSyncService.shared.syncOnStartup()
@@ -56,7 +59,7 @@ struct oAIApp: App {
                 }
                 #if os(macOS)
                 .onReceive(NotificationCenter.default.publisher(for: NSApplication.willTerminateNotification)) { _ in
-                    // Trigger auto-save on app quit
+                    Task { @MainActor in ExternalMCPManager.shared.stopAll() }
                     Task {
                         await chatViewModel.onAppWillTerminate()
                     }
@@ -129,7 +132,7 @@ struct oAIApp: App {
                 Divider()
 
                 Button("Command History") { chatViewModel.showHistory = true }
-                    .keyboardShortcut("h", modifiers: .command)
+                    .keyboardShortcut("h", modifiers: [.command, .shift])
 
                 Button("In-App Help") { chatViewModel.showHelp = true }
                     .keyboardShortcut("/", modifiers: .command)