ios: add multi-polling support

ios/Packages/Sybil/Sources/Sybil/SybilAPIClient.swift

@@ -116,6 +116,10 @@ actor SybilAPIClient: SybilAPIClienting {
         try await request("/v1/models", method: "GET", responseType: ModelCatalogResponse.self)
     }
 
+    func getActiveRuns() async throws -> ActiveRunsResponse {
+        try await request("/v1/active-runs", method: "GET", responseType: ActiveRunsResponse.self)
+    }
+
     func runCompletionStream(
         body: CompletionStreamRequest,
         onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
@@ -133,43 +137,35 @@ actor SybilAPIClient: SybilAPIClienting {
         )
 
         try await stream(request: request) { eventName, dataText in
-            switch eventName {
+            try await Self.handleCompletionStreamEvent(eventName: eventName, dataText: dataText, onEvent: onEvent)
-            case "meta":
-                let payload: CompletionStreamMeta = try Self.decodeEvent(dataText, as: CompletionStreamMeta.self, eventName: eventName)
-                await onEvent(.meta(payload))
-            case "tool_call":
-                let payload: CompletionStreamToolCall = try Self.decodeEvent(dataText, as: CompletionStreamToolCall.self, eventName: eventName)
-                await onEvent(.toolCall(payload))
-            case "delta":
-                let payload: CompletionStreamDelta = try Self.decodeEvent(dataText, as: CompletionStreamDelta.self, eventName: eventName)
-                await onEvent(.delta(payload))
-            case "done":
-                do {
-                    let payload: CompletionStreamDone = try Self.decodeEvent(dataText, as: CompletionStreamDone.self, eventName: eventName)
-                    await onEvent(.done(payload))
-                } catch {
-                    if let recovered = Self.decodeLastJSONLine(dataText, as: CompletionStreamDone.self) {
-                        SybilLog.warning(
-                            SybilLog.network,
-                            "Recovered chat stream done payload from concatenated SSE data"
-                        )
-                        await onEvent(.done(recovered))
-                    } else {
-                        throw error
-                    }
-                }
-            case "error":
-                let payload: StreamErrorPayload = try Self.decodeEvent(dataText, as: StreamErrorPayload.self, eventName: eventName)
-                await onEvent(.error(payload))
-            default:
-                SybilLog.warning(SybilLog.network, "Ignoring unknown chat stream event '\(eventName)'")
-                await onEvent(.ignored)
-            }
         }
 
         SybilLog.info(SybilLog.network, "Chat stream completed")
     }
 
+    func attachCompletionStream(
+        chatID: String,
+        onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
+    ) async throws {
+        let request = try makeRequest(
+            path: "/v1/chats/\(chatID)/stream/attach",
+            method: "POST",
+            body: nil,
+            acceptsSSE: true
+        )
+
+        SybilLog.info(
+            SybilLog.network,
+            "Attaching chat stream POST \(request.url?.absoluteString ?? "<unknown>")"
+        )
+
+        try await stream(request: request) { eventName, dataText in
+            try await Self.handleCompletionStreamEvent(eventName: eventName, dataText: dataText, onEvent: onEvent)
+        }
+
+        SybilLog.info(SybilLog.network, "Attached chat stream completed")
+    }
+
     func runSearchStream(
         searchID: String,
         body: SearchRunRequest,
@@ -188,34 +184,35 @@ actor SybilAPIClient: SybilAPIClienting {
         )
 
         try await stream(request: request) { eventName, dataText in
-            switch eventName {
+            try await Self.handleSearchStreamEvent(eventName: eventName, dataText: dataText, onEvent: onEvent)
-            case "search_results":
-                let payload: SearchResultsPayload = try Self.decodeEvent(dataText, as: SearchResultsPayload.self, eventName: eventName)
-                await onEvent(.searchResults(payload))
-            case "search_error":
-                let payload: SearchErrorPayload = try Self.decodeEvent(dataText, as: SearchErrorPayload.self, eventName: eventName)
-                await onEvent(.searchError(payload))
-            case "answer":
-                let payload: SearchAnswerPayload = try Self.decodeEvent(dataText, as: SearchAnswerPayload.self, eventName: eventName)
-                await onEvent(.answer(payload))
-            case "answer_error":
-                let payload: SearchErrorPayload = try Self.decodeEvent(dataText, as: SearchErrorPayload.self, eventName: eventName)
-                await onEvent(.answerError(payload))
-            case "done":
-                let payload: SearchDonePayload = try Self.decodeEvent(dataText, as: SearchDonePayload.self, eventName: eventName)
-                await onEvent(.done(payload))
-            case "error":
-                let payload: StreamErrorPayload = try Self.decodeEvent(dataText, as: StreamErrorPayload.self, eventName: eventName)
-                await onEvent(.error(payload))
-            default:
-                SybilLog.warning(SybilLog.network, "Ignoring unknown search stream event '\(eventName)'")
-                await onEvent(.ignored)
-            }
         }
 
         SybilLog.info(SybilLog.network, "Search stream completed")
     }
 
+    func attachSearchStream(
+        searchID: String,
+        onEvent: @escaping @Sendable (SearchStreamEvent) async -> Void
+    ) async throws {
+        let request = try makeRequest(
+            path: "/v1/searches/\(searchID)/run/stream/attach",
+            method: "POST",
+            body: nil,
+            acceptsSSE: true
+        )
+
+        SybilLog.info(
+            SybilLog.network,
+            "Attaching search stream POST \(request.url?.absoluteString ?? "<unknown>")"
+        )
+
+        try await stream(request: request) { eventName, dataText in
+            try await Self.handleSearchStreamEvent(eventName: eventName, dataText: dataText, onEvent: onEvent)
+        }
+
+        SybilLog.info(SybilLog.network, "Attached search stream completed")
+    }
+
     private func request<Response: Decodable>(
         _ path: String,
         method: String,
@@ -498,6 +495,75 @@ actor SybilAPIClient: SybilAPIClienting {
         return try? Self.decodeJSON(type, from: data)
     }
 
+    private static func handleCompletionStreamEvent(
+        eventName: String,
+        dataText: String,
+        onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
+    ) async throws {
+        switch eventName {
+        case "meta":
+            let payload: CompletionStreamMeta = try Self.decodeEvent(dataText, as: CompletionStreamMeta.self, eventName: eventName)
+            await onEvent(.meta(payload))
+        case "tool_call":
+            let payload: CompletionStreamToolCall = try Self.decodeEvent(dataText, as: CompletionStreamToolCall.self, eventName: eventName)
+            await onEvent(.toolCall(payload))
+        case "delta":
+            let payload: CompletionStreamDelta = try Self.decodeEvent(dataText, as: CompletionStreamDelta.self, eventName: eventName)
+            await onEvent(.delta(payload))
+        case "done":
+            do {
+                let payload: CompletionStreamDone = try Self.decodeEvent(dataText, as: CompletionStreamDone.self, eventName: eventName)
+                await onEvent(.done(payload))
+            } catch {
+                if let recovered = Self.decodeLastJSONLine(dataText, as: CompletionStreamDone.self) {
+                    SybilLog.warning(
+                        SybilLog.network,
+                        "Recovered chat stream done payload from concatenated SSE data"
+                    )
+                    await onEvent(.done(recovered))
+                } else {
+                    throw error
+                }
+            }
+        case "error":
+            let payload: StreamErrorPayload = try Self.decodeEvent(dataText, as: StreamErrorPayload.self, eventName: eventName)
+            await onEvent(.error(payload))
+        default:
+            SybilLog.warning(SybilLog.network, "Ignoring unknown chat stream event '\(eventName)'")
+            await onEvent(.ignored)
+        }
+    }
+
+    private static func handleSearchStreamEvent(
+        eventName: String,
+        dataText: String,
+        onEvent: @escaping @Sendable (SearchStreamEvent) async -> Void
+    ) async throws {
+        switch eventName {
+        case "search_results":
+            let payload: SearchResultsPayload = try Self.decodeEvent(dataText, as: SearchResultsPayload.self, eventName: eventName)
+            await onEvent(.searchResults(payload))
+        case "search_error":
+            let payload: SearchErrorPayload = try Self.decodeEvent(dataText, as: SearchErrorPayload.self, eventName: eventName)
+            await onEvent(.searchError(payload))
+        case "answer":
+            let payload: SearchAnswerPayload = try Self.decodeEvent(dataText, as: SearchAnswerPayload.self, eventName: eventName)
+            await onEvent(.answer(payload))
+        case "answer_error":
+            let payload: SearchErrorPayload = try Self.decodeEvent(dataText, as: SearchErrorPayload.self, eventName: eventName)
+            await onEvent(.answerError(payload))
+        case "done":
+            let payload: SearchDonePayload = try Self.decodeEvent(dataText, as: SearchDonePayload.self, eventName: eventName)
+            await onEvent(.done(payload))
+        case "error":
+            let payload: StreamErrorPayload = try Self.decodeEvent(dataText, as: StreamErrorPayload.self, eventName: eventName)
+            await onEvent(.error(payload))
+        default:
+            SybilLog.warning(SybilLog.network, "Ignoring unknown search stream event '\(eventName)'")
+            await onEvent(.ignored)
+        }
+    }
+
     private static func flushSSEEvent(
         eventName: inout String,
         dataLines: inout [String]

ios/Packages/Sybil/Sources/Sybil/SybilAPIClienting.swift

@@ -13,13 +13,22 @@ protocol SybilAPIClienting: Sendable {
     func createChatFromSearch(searchID: String, title: String?) async throws -> ChatSummary
     func deleteSearch(searchID: String) async throws
     func listModels() async throws -> ModelCatalogResponse
+    func getActiveRuns() async throws -> ActiveRunsResponse
     func runCompletionStream(
         body: CompletionStreamRequest,
         onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
     ) async throws
+    func attachCompletionStream(
+        chatID: String,
+        onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
+    ) async throws
     func runSearchStream(
         searchID: String,
         body: SearchRunRequest,
         onEvent: @escaping @Sendable (SearchStreamEvent) async -> Void
     ) async throws
+    func attachSearchStream(
+        searchID: String,
+        onEvent: @escaping @Sendable (SearchStreamEvent) async -> Void
+    ) async throws
 }

ios/Packages/Sybil/Sources/Sybil/SybilModels.swift

@@ -354,6 +354,16 @@ public struct SearchDetail: Codable, Identifiable, Hashable, Sendable {
     public var results: [SearchResultItem]
 }
 
+public struct ActiveRunsResponse: Codable, Hashable, Sendable {
+    public var chats: [String]
+    public var searches: [String]
+
+    public init(chats: [String] = [], searches: [String] = []) {
+        self.chats = chats
+        self.searches = searches
+    }
+}
+
 public struct SearchRunRequest: Codable, Sendable {
     public var query: String?
     public var title: String?

ios/Packages/Sybil/Sources/Sybil/SybilPhoneShellView.swift

@@ -554,6 +554,13 @@ private struct SybilPhoneSidebarRow: View {
                 Text(item.title)
                     .font(.sybil(.subheadline, weight: .semibold))
                     .lineLimit(1)
+                    .layoutPriority(1)
+
+                Spacer(minLength: 8)
+
+                if item.isRunning {
+                    SybilSidebarActivityIndicator()
+                }
             }
 
             HStack(spacing: 8) {

ios/Packages/Sybil/Sources/Sybil/SybilSidebarView.swift

@@ -104,6 +104,13 @@ struct SybilSidebarView: View {
                                         Text(item.title)
                                             .font(.sybil(.subheadline, weight: .semibold))
                                             .lineLimit(1)
+                                            .layoutPriority(1)
+
+                                        Spacer(minLength: 8)
+
+                                        if item.isRunning {
+                                            SybilSidebarActivityIndicator()
+                                        }
                                     }
 
                                     HStack(spacing: 8) {
@@ -205,3 +212,15 @@ struct SybilSidebarView: View {
         .buttonStyle(.plain)
     }
 }
+
+struct SybilSidebarActivityIndicator: View {
+    var body: some View {
+        ProgressView()
+            .progressViewStyle(.circular)
+            .controlSize(.small)
+            .tint(SybilTheme.accent)
+            .scaleEffect(0.82)
+            .frame(width: 16, height: 16)
+            .accessibilityLabel("Generating")
+    }
+}

ios/Packages/Sybil/Sources/Sybil/SybilWorkspaceView.swift

@@ -75,7 +75,7 @@ struct SybilWorkspaceView: View {
         guard onRequestNewChat != nil else {
             return false
         }
-        guard !viewModel.isSending, viewModel.draftKind == nil else {
+        guard !viewModel.isActiveSelectionSending, viewModel.draftKind == nil else {
             return false
         }
         guard case .chat = viewModel.selectedItem else {
@@ -155,7 +155,7 @@ struct SybilWorkspaceView: View {
             workspaceContentStack
 
             if showsCustomWorkspaceNavigation {
-                SybilWorkspaceCharacterBackdrop(isBusy: viewModel.isSending)
+                SybilWorkspaceCharacterBackdrop(isBusy: viewModel.isActiveSelectionSending)
                     .allowsHitTesting(false)
                 customWorkspaceNavigationBar
             }
@@ -560,10 +560,10 @@ struct SybilWorkspaceView: View {
                                 Circle()
                                     .stroke(SybilTheme.border.opacity(0.82), lineWidth: 1)
                             )
-                            .foregroundStyle(viewModel.isSending ? SybilTheme.textMuted : SybilTheme.text)
+                            .foregroundStyle(viewModel.isActiveSelectionSending ? SybilTheme.textMuted : SybilTheme.text)
                     }
                     .buttonStyle(.plain)
-                    .disabled(viewModel.isSending)
+                    .disabled(viewModel.isActiveSelectionSending)
                     .accessibilityLabel("Attach file")
                 }
 
@@ -626,7 +626,7 @@ struct SybilWorkspaceView: View {
             }
         }
         .onDrop(of: [UTType.fileURL.identifier, UTType.image.identifier], isTargeted: $isComposerDropTargeted) { providers in
-            if viewModel.isSearchMode || viewModel.isSending {
+            if viewModel.isSearchMode || viewModel.isActiveSelectionSending {
                 return false
             }
 

ios/Packages/Sybil/Tests/SybilTests/SybilTests.swift

@@ -8,6 +8,9 @@ private struct MockClientCallSnapshot: Sendable {
     var listSearches = 0
     var getChat = 0
     var getSearch = 0
+    var getActiveRuns = 0
+    var attachCompletionStream = 0
+    var attachSearchStream = 0
 }
 
 private struct UnexpectedClientCall: Error {}
@@ -18,27 +21,34 @@ private actor MockSybilClient: SybilAPIClienting {
     private let chatDetails: [String: ChatDetail]
     private let searchDetails: [String: SearchDetail]
     private let createChatResponse: ChatSummary?
+    private let activeRunsResponse: ActiveRunsResponse
 
     private var snapshot = MockClientCallSnapshot()
     private var getChatDelayNanoseconds: UInt64 = 0
     private var getSearchDelayNanoseconds: UInt64 = 0
     private var completionStreamNetworkErrorMessage: String?
     private var completionStreamDelayNanoseconds: UInt64 = 0
+    private var completionAttachEvents: [String: [CompletionStreamEvent]] = [:]
+    private var completionAttachDelayNanoseconds: UInt64 = 0
     private var searchStreamNetworkErrorMessage: String?
     private var searchStreamDelayNanoseconds: UInt64 = 0
+    private var searchAttachEvents: [String: [SearchStreamEvent]] = [:]
+    private var searchAttachDelayNanoseconds: UInt64 = 0
 
     init(
         chatsResponse: [ChatSummary] = [],
         searchesResponse: [SearchSummary] = [],
         chatDetails: [String: ChatDetail] = [:],
         searchDetails: [String: SearchDetail] = [:],
-        createChatResponse: ChatSummary? = nil
+        createChatResponse: ChatSummary? = nil,
+        activeRunsResponse: ActiveRunsResponse = ActiveRunsResponse()
     ) {
         self.chatsResponse = chatsResponse
         self.searchesResponse = searchesResponse
         self.chatDetails = chatDetails
         self.searchDetails = searchDetails
         self.createChatResponse = createChatResponse
+        self.activeRunsResponse = activeRunsResponse
     }
 
     func currentSnapshot() -> MockClientCallSnapshot {
@@ -63,6 +73,24 @@ private actor MockSybilClient: SybilAPIClienting {
         searchStreamDelayNanoseconds = delayNanoseconds
     }
 
+    func setCompletionAttachEvents(
+        chatID: String,
+        events: [CompletionStreamEvent],
+        delayNanoseconds: UInt64 = 0
+    ) {
+        completionAttachEvents[chatID] = events
+        completionAttachDelayNanoseconds = delayNanoseconds
+    }
+
+    func setSearchAttachEvents(
+        searchID: String,
+        events: [SearchStreamEvent],
+        delayNanoseconds: UInt64 = 0
+    ) {
+        searchAttachEvents[searchID] = events
+        searchAttachDelayNanoseconds = delayNanoseconds
+    }
+
     func verifySession() async throws -> AuthSession {
         AuthSession(authenticated: true, mode: "open")
     }
@@ -130,6 +158,11 @@ private actor MockSybilClient: SybilAPIClienting {
         ModelCatalogResponse(providers: [:])
     }
 
+    func getActiveRuns() async throws -> ActiveRunsResponse {
+        snapshot.getActiveRuns += 1
+        return activeRunsResponse
+    }
+
     func runCompletionStream(
         body: CompletionStreamRequest,
         onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
@@ -143,6 +176,20 @@ private actor MockSybilClient: SybilAPIClienting {
         throw UnexpectedClientCall()
     }
 
+    func attachCompletionStream(
+        chatID: String,
+        onEvent: @escaping @Sendable (CompletionStreamEvent) async -> Void
+    ) async throws {
+        snapshot.attachCompletionStream += 1
+        let events = completionAttachEvents[chatID] ?? []
+        for event in events {
+            await onEvent(event)
+        }
+        if completionAttachDelayNanoseconds > 0 {
+            try await Task.sleep(nanoseconds: completionAttachDelayNanoseconds)
+        }
+    }
+
     func runSearchStream(
         searchID: String,
         body: SearchRunRequest,
@@ -156,6 +203,20 @@ private actor MockSybilClient: SybilAPIClienting {
         }
         throw UnexpectedClientCall()
     }
+
+    func attachSearchStream(
+        searchID: String,
+        onEvent: @escaping @Sendable (SearchStreamEvent) async -> Void
+    ) async throws {
+        snapshot.attachSearchStream += 1
+        let events = searchAttachEvents[searchID] ?? []
+        for event in events {
+            await onEvent(event)
+        }
+        if searchAttachDelayNanoseconds > 0 {
+            try await Task.sleep(nanoseconds: searchAttachDelayNanoseconds)
+        }
+    }
 }
 
 @MainActor
@@ -409,6 +470,59 @@ private func makeSearchDetail(id: String, date: Date, answer: String) -> SearchD
     await sendTask.value
 }
 
+@MainActor
+@Test func reconnectAttachesSelectedActiveChatStream() async throws {
+    let date = Date(timeIntervalSince1970: 1_700_000_260)
+    let chat = makeChatSummary(id: "chat-active", date: date)
+    let detail = makeChatDetail(id: "chat-active", date: date, body: "existing transcript")
+    let client = MockSybilClient(
+        chatsResponse: [chat],
+        chatDetails: ["chat-active": detail],
+        activeRunsResponse: ActiveRunsResponse(chats: ["chat-active"])
+    )
+    await client.setCompletionAttachEvents(
+        chatID: "chat-active",
+        events: [.delta(CompletionStreamDelta(text: "streaming"))],
+        delayNanoseconds: 100_000_000
+    )
+    let viewModel = SybilViewModel(settings: testSettings(named: #function)) { _ in client }
+
+    await viewModel.reconnect()
+    try await Task.sleep(nanoseconds: 20_000_000)
+
+    let snapshot = await client.currentSnapshot()
+    #expect(snapshot.getActiveRuns >= 1)
+    #expect(snapshot.attachCompletionStream == 1)
+    #expect(viewModel.sidebarItems.first?.isRunning == true)
+    #expect(viewModel.isSendingVisibleChat)
+    #expect(viewModel.displayedMessages.last?.content == "streaming")
+}
+
+@MainActor
+@Test func activeRunOnDifferentChatDoesNotDisableComposer() async throws {
+    let date = Date(timeIntervalSince1970: 1_700_000_270)
+    let activeChat = makeChatSummary(id: "chat-active", date: date)
+    let idleChat = makeChatSummary(id: "chat-idle", date: date.addingTimeInterval(1))
+    let client = MockSybilClient(
+        chatsResponse: [idleChat, activeChat],
+        chatDetails: [
+            "chat-active": makeChatDetail(id: "chat-active", date: date, body: "active transcript"),
+            "chat-idle": makeChatDetail(id: "chat-idle", date: date, body: "idle transcript")
+        ],
+        activeRunsResponse: ActiveRunsResponse(chats: ["chat-active"])
+    )
+    let viewModel = SybilViewModel(settings: testSettings(named: #function)) { _ in client }
+    viewModel.selectedItem = .chat("chat-idle")
+    viewModel.composer = "new message"
+
+    await viewModel.reconnect()
+
+    #expect(viewModel.selectedItem == .chat("chat-idle"))
+    #expect(viewModel.sidebarItems.first(where: { $0.selection == .chat("chat-active") })?.isRunning == true)
+    #expect(!viewModel.isActiveSelectionSending)
+    #expect(viewModel.canSendComposer)
+}
+
 @MainActor
 @Test func backgroundChatStreamInterruptionIsSuppressedUntilForegroundRefresh() async throws {
     let date = Date(timeIntervalSince1970: 1_700_000_300)