oAI.xcodeproj/project.pbxproj

@@ -11,8 +11,19 @@
 		A550A8342F3C5C9300136F2B /* GRDB in Frameworks */ = {isa = PBXBuildFile; productRef = A550A6812F3B730000136F2B /* GRDB */; };
 /* End PBXBuildFile section */
 
+/* Begin PBXContainerItemProxy section */
+		A586FF5530122589002CFF95 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = A550A65A2F3B72EA00136F2B /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = A550A6612F3B72EA00136F2B;
+			remoteInfo = oAI;
+		};
+/* End PBXContainerItemProxy section */
+
 /* Begin PBXFileReference section */
 		A550A6622F3B72EA00136F2B /* oAI.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = oAI.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		A586FF5130122589002CFF95 /* oAITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = oAITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
 /* Begin PBXFileSystemSynchronizedBuildFileExceptionSet section */
@@ -34,6 +45,11 @@
 			path = oAI;
 			sourceTree = "<group>";
 		};
+		A586FF5230122589002CFF95 /* oAITests */ = {
+			isa = PBXFileSystemSynchronizedRootGroup;
+			path = oAITests;
+			sourceTree = "<group>";
+		};
 /* End PBXFileSystemSynchronizedRootGroup section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -46,6 +62,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		A586FF4E30122589002CFF95 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
@@ -53,6 +76,7 @@
 			isa = PBXGroup;
 			children = (
 				A550A6642F3B72EA00136F2B /* oAI */,
+				A586FF5230122589002CFF95 /* oAITests */,
 				A550A6632F3B72EA00136F2B /* Products */,
 			);
 			sourceTree = "<group>";
@@ -61,6 +85,7 @@
 			isa = PBXGroup;
 			children = (
 				A550A6622F3B72EA00136F2B /* oAI.app */,
+				A586FF5130122589002CFF95 /* oAITests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -92,6 +117,29 @@
 			productReference = A550A6622F3B72EA00136F2B /* oAI.app */;
 			productType = "com.apple.product-type.application";
 		};
+		A586FF5030122589002CFF95 /* oAITests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = A586FF5930122589002CFF95 /* Build configuration list for PBXNativeTarget "oAITests" */;
+			buildPhases = (
+				A586FF4D30122589002CFF95 /* Sources */,
+				A586FF4E30122589002CFF95 /* Frameworks */,
+				A586FF4F30122589002CFF95 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				A586FF5630122589002CFF95 /* PBXTargetDependency */,
+			);
+			fileSystemSynchronizedGroups = (
+				A586FF5230122589002CFF95 /* oAITests */,
+			);
+			name = oAITests;
+			packageProductDependencies = (
+			);
+			productName = oAITests;
+			productReference = A586FF5130122589002CFF95 /* oAITests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -99,12 +147,16 @@
 			isa = PBXProject;
 			attributes = {
 				BuildIndependentTargetsInParallel = 1;
-				LastSwiftUpdateCheck = 2620;
-				LastUpgradeCheck = 2620;
+				LastSwiftUpdateCheck = 2700;
+				LastUpgradeCheck = 2700;
 				TargetAttributes = {
 					A550A6612F3B72EA00136F2B = {
 						CreatedOnToolsVersion = 26.2;
 					};
+					A586FF5030122589002CFF95 = {
+						CreatedOnToolsVersion = 27.0;
+						TestTargetID = A550A6612F3B72EA00136F2B;
+					};
 				};
 			};
 			buildConfigurationList = A550A65D2F3B72EA00136F2B /* Build configuration list for PBXProject "oAI" */;
@@ -131,6 +183,7 @@
 			projectRoot = "";
 			targets = (
 				A550A6612F3B72EA00136F2B /* oAI */,
+				A586FF5030122589002CFF95 /* oAITests */,
 			);
 		};
 /* End PBXProject section */
@@ -143,6 +196,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		A586FF4F30122589002CFF95 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -153,14 +213,30 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		A586FF4D30122589002CFF95 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXSourcesBuildPhase section */
 
+/* Begin PBXTargetDependency section */
+		A586FF5630122589002CFF95 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = A550A6612F3B72EA00136F2B /* oAI */;
+			targetProxy = A586FF5530122589002CFF95 /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
 /* Begin XCBuildConfiguration section */
 		A550A66B2F3B72EC00136F2B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
@@ -190,7 +266,9 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
+				DEVELOPMENT_TEAM = 6RJQ2QZYPG;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = YES;
@@ -212,6 +290,7 @@
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 			};
@@ -222,6 +301,7 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
@@ -251,7 +331,9 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				DEVELOPMENT_TEAM = 6RJQ2QZYPG;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = YES;
@@ -266,6 +348,7 @@
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_COMPILATION_MODE = wholemodule;
 			};
 			name = Release;
@@ -278,12 +361,12 @@
 				CODE_SIGN_ENTITLEMENTS = oAI/oAI.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
-				DEVELOPMENT_TEAM = 6RJQ2QZYPG;
+				DEAD_CODE_STRIPPING = YES;
 				ENABLE_APP_SANDBOX = NO;
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
-				INFOPLIST_FILE = "oAI/Info.plist";
+				INFOPLIST_FILE = oAI/Info.plist;
 				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.";
@@ -328,12 +411,12 @@
 				CODE_SIGN_ENTITLEMENTS = oAI/oAI.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
-				DEVELOPMENT_TEAM = 6RJQ2QZYPG;
+				DEAD_CODE_STRIPPING = YES;
 				ENABLE_APP_SANDBOX = NO;
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
-				INFOPLIST_FILE = "oAI/Info.plist";
+				INFOPLIST_FILE = oAI/Info.plist;
 				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.";
@@ -370,6 +453,50 @@
 			};
 			name = Release;
 		};
+		A586FF5730122589002CFF95 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
+				GENERATE_INFOPLIST_FILE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 27.0;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.oai.oAITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SDKROOT = macosx;
+				STRING_CATALOG_GENERATE_SYMBOLS = NO;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/oAI.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/oAI";
+			};
+			name = Debug;
+		};
+		A586FF5830122589002CFF95 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
+				GENERATE_INFOPLIST_FILE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 27.0;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.oai.oAITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SDKROOT = macosx;
+				STRING_CATALOG_GENERATE_SYMBOLS = NO;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/oAI.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/oAI";
+			};
+			name = Release;
+		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
@@ -391,6 +518,15 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		A586FF5930122589002CFF95 /* Build configuration list for PBXNativeTarget "oAITests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				A586FF5730122589002CFF95 /* Debug */,
+				A586FF5830122589002CFF95 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 /* End XCConfigurationList section */
 
 /* Begin XCRemoteSwiftPackageReference section */

oAI/Providers/AnthropicProvider.swift

@@ -186,6 +186,21 @@ class AnthropicProvider: AIProvider {
         ("claude-haiku",   0.80, 4.0),
     ]
 
+    /// Fuzzy pricing lookup for a model ID not found in `knownModels`: finds the
+    /// longest matching prefix in `fallback` (longest match wins when several
+    /// prefixes match, e.g. a future "claude-sonnet-mini" against both
+    /// "claude-sonnet" and a shorter unrelated prefix). Unmatched IDs price at zero.
+    static func resolveFallbackPricing(
+        for modelId: String,
+        fallback: [(prefix: String, prompt: Double, completion: Double)] = pricingFallback
+    ) -> ModelInfo.Pricing {
+        let match = fallback
+            .filter { modelId.hasPrefix($0.prefix) }
+            .max(by: { $0.prefix.count < $1.prefix.count })
+        return match.map { ModelInfo.Pricing(prompt: $0.prompt, completion: $0.completion) }
+            ?? ModelInfo.Pricing(prompt: 0, completion: 0)
+    }
+
     /// Fetch live model list from GET /v1/models, enriched with local pricing/context metadata.
     /// Falls back to knownModels if the request fails (no key, offline, etc.).
     func listModels() async throws -> [ModelInfo] {
@@ -223,11 +238,7 @@ class AnthropicProvider: AIProvider {
                 // Exact match first
                 if let known = enrichment[id] { return known }
                 // Fuzzy fallback: find the longest prefix that matches
-                let fallback = Self.pricingFallback
-                    .filter { id.hasPrefix($0.prefix) }
-                    .max(by: { $0.prefix.count < $1.prefix.count })
-                let pricing = fallback.map { ModelInfo.Pricing(prompt: $0.prompt, completion: $0.completion) }
-                    ?? ModelInfo.Pricing(prompt: 0, completion: 0)
+                let pricing = Self.resolveFallbackPricing(for: id)
                 return ModelInfo(
                     id: id,
                     name: displayName,

oAI/Services/BackupService.swift

@@ -206,37 +206,68 @@ final class BackupService {
         log.debug("Pushed \(payload.ids.count) favorite model(s) to iCloud")
     }
 
+    /// Outcome of reconciling local favorites against the iCloud copy. Pure result type --
+    /// see `decideFavoritesSync` for the actual decision logic.
+    enum FavoritesSyncDecision: Equatable {
+        case applyRemote(ids: Set<String>, updatedAt: String)
+        case pushLocal
+        case mergeAndPush(ids: Set<String>, updatedAt: String)
+        case noop
+    }
+
+    /// Last-write-wins reconciliation, pulled out of `syncFavoritesOnLaunch` so the branching
+    /// logic (5 cases: remote absent / remote newer / local newer / tied-but-different /
+    /// tied-and-identical) can be tested without touching iCloud Drive or SettingsService.
+    static func decideFavoritesSync(
+        localIds: Set<String>,
+        localUpdatedAt: String,
+        remote: FavoritesPayload?,
+        now: Date
+    ) -> FavoritesSyncDecision {
+        guard let remote else {
+            return .pushLocal
+        }
+        if remote.updatedAt > localUpdatedAt {
+            return .applyRemote(ids: Set(remote.ids), updatedAt: remote.updatedAt)
+        } else if localUpdatedAt > remote.updatedAt {
+            return .pushLocal
+        } else if Set(remote.ids) != localIds {
+            // Tied timestamps (both empty is the common case: two machines that already had
+            // favorites before this sync feature existed, neither ever bumped the timestamp).
+            // Union rather than silently dropping one side's favorites.
+            let merged = localIds.union(remote.ids)
+            return .mergeAndPush(ids: merged, updatedAt: ISO8601DateFormatter().string(from: now))
+        }
+        return .noop
+    }
+
     /// Reconcile local favorites with the iCloud copy using last-write-wins (by timestamp).
     /// Call on launch (and optionally on app-become-active) to pick up changes from other machines.
     func syncFavoritesOnLaunch() async {
         let settings = SettingsService.shared
         let fileURL = favoritesFileURL()
 
-        guard let data = try? Data(contentsOf: fileURL),
-              let remote = try? JSONDecoder().decode(FavoritesPayload.self, from: data) else {
-            // No remote copy yet — push local state (may be empty, that's fine).
-            await pushFavorites()
-            return
-        }
-
-        let localUpdatedAt = settings.favoriteModelsUpdatedAt
+        let remote: FavoritesPayload? = {
+            guard let data = try? Data(contentsOf: fileURL) else { return nil }
+            return try? JSONDecoder().decode(FavoritesPayload.self, from: data)
+        }()
         let localIds = settings.favoriteModelIds
-        if remote.updatedAt > localUpdatedAt {
-            settings.favoriteModelIds = Set(remote.ids)
-            settings.favoriteModelsUpdatedAt = remote.updatedAt
-            log.info("Applied \(remote.ids.count) favorite model(s) from iCloud (remote was newer)")
-        } else if localUpdatedAt > remote.updatedAt {
+
+        switch Self.decideFavoritesSync(localIds: localIds, localUpdatedAt: settings.favoriteModelsUpdatedAt, remote: remote, now: Date()) {
+        case .pushLocal:
             await pushFavorites()
-        } else if Set(remote.ids) != localIds {
-            // Tied timestamps (both empty is the common case: two machines that already had
-            // favorites before this sync feature existed, neither ever bumped the timestamp).
-            // Union rather than silently dropping one side's favorites.
-            settings.favoriteModelIds = localIds.union(remote.ids)
-            settings.favoriteModelsUpdatedAt = ISO8601DateFormatter().string(from: Date())
+        case .applyRemote(let ids, let updatedAt):
+            settings.favoriteModelIds = ids
+            settings.favoriteModelsUpdatedAt = updatedAt
+            log.info("Applied \(ids.count) favorite model(s) from iCloud (remote was newer)")
+        case .mergeAndPush(let ids, let updatedAt):
+            settings.favoriteModelIds = ids
+            settings.favoriteModelsUpdatedAt = updatedAt
             await pushFavorites()
-            log.info("Merged favorites from iCloud (tied timestamps) — union of \(localIds.count) local + \(remote.ids.count) remote")
+            log.info("Merged favorites from iCloud (tied timestamps) — union of \(localIds.count) local + \(remote?.ids.count ?? 0) remote")
+        case .noop:
+            break
         }
-        // Equal timestamps and identical sets: already in sync, nothing to do.
     }
 
     // MARK: - Automatic Backup
@@ -252,17 +283,27 @@ final class BackupService {
         }
     }
 
-    func checkAndPerformAutoBackupIfDue() async {
-        let frequency = SettingsService.shared.autoBackupFrequency
+    /// Whether an automatic backup should run now, given the chosen frequency and the last
+    /// known backup time. Pulled out of `checkAndPerformAutoBackupIfDue` for testability --
+    /// "manual" is never due, a missing last-backup-date is always due, otherwise it's due
+    /// once the elapsed time reaches the frequency's interval.
+    static func isBackupDue(frequency: String, lastBackupDate: Date?, now: Date) -> Bool {
         let interval: TimeInterval
         switch frequency {
-        case "daily": interval = Self.dailyInterval
-        case "weekly": interval = Self.weeklyInterval
-        default: return // "manual" — user triggers backups by hand
+        case "daily": interval = dailyInterval
+        case "weekly": interval = weeklyInterval
+        default: return false // "manual" — user triggers backups by hand
         }
+        guard let last = lastBackupDate else { return true }
+        return now.timeIntervalSince(last) >= interval
+    }
+
+    func checkAndPerformAutoBackupIfDue() async {
+        let frequency = SettingsService.shared.autoBackupFrequency
+        guard frequency == "daily" || frequency == "weekly" else { return }
 
         checkForExistingBackup()
-        if let last = lastBackupDate, Date().timeIntervalSince(last) < interval {
+        guard Self.isBackupDue(frequency: frequency, lastBackupDate: lastBackupDate, now: Date()) else {
             return // not due yet
         }
 

oAI/Services/GitSyncService.swift

@@ -45,7 +45,7 @@ class GitSyncService {
     func testConnection() async throws -> String {
         let url = try buildAuthenticatedURL()
         _ = try await runGit(["ls-remote", url])
-        return "Connected to \(extractProvider())"
+        return "Connected to \(Self.extractProvider(from: settings.syncRepoURL))"
     }
 
     /// Clone repository to local path
@@ -703,8 +703,7 @@ class GitSyncService {
         return name.components(separatedBy: invalid).joined(separator: "-")
     }
 
-    private func extractProvider() -> String {
-        let url = settings.syncRepoURL
+    static func extractProvider(from url: String) -> String {
         if url.contains("github.com") {
             return "GitHub"
         } else if url.contains("gitlab.com") {

oAI/ViewModels/ChatViewModel.swift

@@ -1888,40 +1888,43 @@ Don't narrate future actions ("Let me...") - just use the tools.
         }
     }
 
+    /// Pure auto-save eligibility check, pulled out of `shouldAutoSave()` so the criteria
+    /// (enabled, configured, cloned, min message count, not-already-saved) can be tested
+    /// without a live ChatViewModel/GitSyncService/SettingsService.
+    nonisolated static func shouldAutoSave(
+        syncEnabled: Bool,
+        syncAutoSave: Bool,
+        syncConfigured: Bool,
+        isCloned: Bool,
+        chatMessageCount: Int,
+        minMessages: Int,
+        lastSavedConversationId: String?,
+        currentConversationHash: String
+    ) -> Bool {
+        guard syncEnabled && syncAutoSave else { return false }
+        guard syncConfigured else { return false }
+        guard isCloned else { return false }
+        guard chatMessageCount >= minMessages else { return false }
+        if let lastSavedId = lastSavedConversationId, lastSavedId == currentConversationHash {
+            return false // Already saved this exact conversation
+        }
+        return true
+    }
+
     /// Check if conversation should be auto-saved based on criteria
     func shouldAutoSave() -> Bool {
-        // Check if auto-save is enabled
-        guard settings.syncEnabled && settings.syncAutoSave else {
-            return false
-        }
-
-        // Check if sync is configured
-        guard settings.syncConfigured else {
-            return false
-        }
-
-        // Check if repository is cloned
-        guard GitSyncService.shared.syncStatus.isCloned else {
-            return false
-        }
-
-        // Check minimum message count
         let chatMessages = messages.filter { $0.role == .user || $0.role == .assistant }
-        guard chatMessages.count >= settings.syncAutoSaveMinMessages else {
-            return false
-        }
-
-        // Check if already auto-saved this conversation
-        // (prevent duplicate saves)
-        if let lastSavedId = settings.syncLastAutoSaveConversationId {
-            // Create a hash of current conversation to detect if it's the same one
-            let currentHash = chatMessages.map { $0.content }.joined()
-            if lastSavedId == currentHash {
-                return false // Already saved this exact conversation
-            }
-        }
-
-        return true
+        let currentHash = chatMessages.map { $0.content }.joined()
+        return Self.shouldAutoSave(
+            syncEnabled: settings.syncEnabled,
+            syncAutoSave: settings.syncAutoSave,
+            syncConfigured: settings.syncConfigured,
+            isCloned: GitSyncService.shared.syncStatus.isCloned,
+            chatMessageCount: chatMessages.count,
+            minMessages: settings.syncAutoSaveMinMessages,
+            lastSavedConversationId: settings.syncLastAutoSaveConversationId,
+            currentConversationHash: currentHash
+        )
     }
 
     /// Auto-save the current conversation with background summarization

oAITests/AnthropicProviderTests.swift

@@ -177,4 +177,31 @@ struct AnthropicProviderTests {
         #expect(items?["type"] as? String == "string")
         #expect(dict["required"] == nil)
     }
+
+    // MARK: - resolveFallbackPricing
+
+    @Test("Exact-length single prefix match returns that tier's pricing")
+    func fallbackPricingSingleMatch() {
+        let pricing = AnthropicProvider.resolveFallbackPricing(for: "claude-haiku-4-5-20251001")
+        #expect(pricing.prompt == 0.80)
+        #expect(pricing.completion == 4.0)
+    }
+
+    @Test("Longest matching prefix wins when multiple prefixes could match")
+    func fallbackPricingLongestPrefixWins() {
+        let fallback: [(prefix: String, prompt: Double, completion: Double)] = [
+            ("claude", 1.0, 2.0),
+            ("claude-sonnet", 3.0, 15.0),
+        ]
+        let pricing = AnthropicProvider.resolveFallbackPricing(for: "claude-sonnet-5", fallback: fallback)
+        #expect(pricing.prompt == 3.0)
+        #expect(pricing.completion == 15.0)
+    }
+
+    @Test("An unmatched model ID prices at zero rather than guessing")
+    func fallbackPricingNoMatch() {
+        let pricing = AnthropicProvider.resolveFallbackPricing(for: "some-future-unknown-model")
+        #expect(pricing.prompt == 0)
+        #expect(pricing.completion == 0)
+    }
 }

oAITests/BackupServiceTests.swift

@@ -0,0 +1,105 @@
+//
+//  BackupServiceTests.swift
+//  oAITests
+//
+// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0
+// Copyright (C) 2026 Rune Olsen
+
+import Testing
+import Foundation
+@testable import oAI
+
+@Suite("BackupService.decideFavoritesSync")
+struct BackupServiceFavoritesSyncTests {
+
+    private let now = Date(timeIntervalSince1970: 1_700_000_000)
+
+    @Test("No remote copy yet -- push local state")
+    func noRemoteCopy() {
+        let decision = BackupService.decideFavoritesSync(localIds: ["a", "b"], localUpdatedAt: "", remote: nil, now: now)
+        #expect(decision == .pushLocal)
+    }
+
+    @Test("Remote is newer -- apply it locally")
+    func remoteNewer() {
+        let remote = FavoritesPayload(updatedAt: "2026-02-01T00:00:00Z", ids: ["x", "y"])
+        let decision = BackupService.decideFavoritesSync(
+            localIds: ["a"],
+            localUpdatedAt: "2026-01-01T00:00:00Z",
+            remote: remote,
+            now: now
+        )
+        #expect(decision == .applyRemote(ids: ["x", "y"], updatedAt: "2026-02-01T00:00:00Z"))
+    }
+
+    @Test("Local is newer -- push local state, don't touch remote")
+    func localNewer() {
+        let remote = FavoritesPayload(updatedAt: "2026-01-01T00:00:00Z", ids: ["x"])
+        let decision = BackupService.decideFavoritesSync(
+            localIds: ["a"],
+            localUpdatedAt: "2026-02-01T00:00:00Z",
+            remote: remote,
+            now: now
+        )
+        #expect(decision == .pushLocal)
+    }
+
+    @Test("Tied timestamps with different sets -- merge via union and push")
+    func tiedTimestampsDifferentSets() {
+        let remote = FavoritesPayload(updatedAt: "", ids: ["b", "c"])
+        let decision = BackupService.decideFavoritesSync(localIds: ["a", "b"], localUpdatedAt: "", remote: remote, now: now)
+        guard case .mergeAndPush(let ids, let updatedAt) = decision else {
+            Issue.record("Expected .mergeAndPush")
+            return
+        }
+        #expect(ids == ["a", "b", "c"])
+        #expect(!updatedAt.isEmpty) // stamped with `now`, not left blank
+    }
+
+    @Test("Tied timestamps with identical sets -- no-op, already in sync")
+    func tiedTimestampsIdenticalSets() {
+        let remote = FavoritesPayload(updatedAt: "2026-01-01T00:00:00Z", ids: ["a", "b"])
+        let decision = BackupService.decideFavoritesSync(
+            localIds: ["a", "b"],
+            localUpdatedAt: "2026-01-01T00:00:00Z",
+            remote: remote,
+            now: now
+        )
+        #expect(decision == .noop)
+    }
+}
+
+@Suite("BackupService.isBackupDue")
+struct BackupServiceAutoBackupTests {
+
+    private let now = Date(timeIntervalSince1970: 1_700_000_000)
+    private let oneHour: TimeInterval = 3600
+
+    @Test("Manual frequency is never due")
+    func manualNeverDue() {
+        #expect(!BackupService.isBackupDue(frequency: "manual", lastBackupDate: nil, now: now))
+        #expect(!BackupService.isBackupDue(frequency: "manual", lastBackupDate: now.addingTimeInterval(-1_000_000), now: now))
+    }
+
+    @Test("No prior backup at all is always due, regardless of frequency")
+    func noPriorBackupIsAlwaysDue() {
+        #expect(BackupService.isBackupDue(frequency: "daily", lastBackupDate: nil, now: now))
+        #expect(BackupService.isBackupDue(frequency: "weekly", lastBackupDate: nil, now: now))
+    }
+
+    @Test("Daily: not due before 24 hours have passed, due at or after")
+    func dailyThreshold() {
+        let justUnder = now.addingTimeInterval(-(24 * oneHour - 1))
+        let exactly = now.addingTimeInterval(-(24 * oneHour))
+        #expect(!BackupService.isBackupDue(frequency: "daily", lastBackupDate: justUnder, now: now))
+        #expect(BackupService.isBackupDue(frequency: "daily", lastBackupDate: exactly, now: now))
+    }
+
+    @Test("Weekly: not due before 7 days have passed, due at or after")
+    func weeklyThreshold() {
+        let justUnder = now.addingTimeInterval(-(7 * 24 * oneHour - 1))
+        let exactly = now.addingTimeInterval(-(7 * 24 * oneHour))
+        #expect(!BackupService.isBackupDue(frequency: "weekly", lastBackupDate: justUnder, now: now))
+        #expect(BackupService.isBackupDue(frequency: "weekly", lastBackupDate: exactly, now: now))
+    }
+}

oAITests/ChatViewModelPureLogicTests.swift

@@ -103,4 +103,60 @@ struct ChatViewModelPureLogicTests {
         let pricing = ModelInfo.Pricing(prompt: 3.0, completion: 15.0)
         #expect(ChatViewModel.calculateCost(usage: usage, pricing: pricing) == 0.0)
     }
+
+    // MARK: - shouldAutoSave
+
+    private func autoSaveEligible(
+        syncEnabled: Bool = true,
+        syncAutoSave: Bool = true,
+        syncConfigured: Bool = true,
+        isCloned: Bool = true,
+        chatMessageCount: Int = 10,
+        minMessages: Int = 4,
+        lastSavedConversationId: String? = nil,
+        currentConversationHash: String = "hash-a"
+    ) -> Bool {
+        ChatViewModel.shouldAutoSave(
+            syncEnabled: syncEnabled,
+            syncAutoSave: syncAutoSave,
+            syncConfigured: syncConfigured,
+            isCloned: isCloned,
+            chatMessageCount: chatMessageCount,
+            minMessages: minMessages,
+            lastSavedConversationId: lastSavedConversationId,
+            currentConversationHash: currentConversationHash
+        )
+    }
+
+    @Test("Eligible when every criterion is satisfied")
+    func autoSaveEligibleWhenAllCriteriaMet() {
+        #expect(autoSaveEligible())
+    }
+
+    @Test("Not eligible when sync or auto-save is disabled")
+    func autoSaveIneligibleWhenDisabled() {
+        #expect(!autoSaveEligible(syncEnabled: false))
+        #expect(!autoSaveEligible(syncAutoSave: false))
+    }
+
+    @Test("Not eligible when sync isn't configured or the repo isn't cloned")
+    func autoSaveIneligibleWhenNotConfiguredOrCloned() {
+        #expect(!autoSaveEligible(syncConfigured: false))
+        #expect(!autoSaveEligible(isCloned: false))
+    }
+
+    @Test("Not eligible below the minimum message count")
+    func autoSaveIneligibleBelowMinimumMessages() {
+        #expect(!autoSaveEligible(chatMessageCount: 2, minMessages: 4))
+    }
+
+    @Test("Not eligible if this exact conversation was already auto-saved")
+    func autoSaveIneligibleWhenAlreadySaved() {
+        #expect(!autoSaveEligible(lastSavedConversationId: "hash-a", currentConversationHash: "hash-a"))
+    }
+
+    @Test("Eligible when the last saved hash differs from the current conversation")
+    func autoSaveEligibleWhenConversationChanged() {
+        #expect(autoSaveEligible(lastSavedConversationId: "hash-a", currentConversationHash: "hash-b"))
+    }
 }

oAITests/GitSyncServiceTests.swift

@@ -91,4 +91,18 @@ struct GitSyncServiceTests {
         let shortKey = "sk-" + String(repeating: "a", count: 31)
         #expect(!service.detectSecretsInText(shortKey).contains("OpenAI Key"))
     }
+
+    // MARK: - extractProvider
+
+    @Test("Recognizes github.com, gitlab.com, and gitea URLs by name")
+    func extractProviderRecognizesKnownHosts() {
+        #expect(GitSyncService.extractProvider(from: "https://github.com/user/repo.git") == "GitHub")
+        #expect(GitSyncService.extractProvider(from: "https://gitlab.com/user/repo.git") == "GitLab")
+        #expect(GitSyncService.extractProvider(from: "https://my-gitea-instance.example.com/user/repo.git") == "Gitea")
+    }
+
+    @Test("Falls back to a generic label for an unrecognized host")
+    func extractProviderFallsBackForUnknownHost() {
+        #expect(GitSyncService.extractProvider(from: "https://gitlab.pm/rune/oai-swift.git") == "Git repository")
+    }
 }