Add team tasks: several agents in one worktree sharing a board

mac/Sources/Byre/Chat.swift

@@ -13,6 +13,8 @@ final class ChatModel {
     let kind: ChatKind
     let store: Store
     let builder: TranscriptBuilder
+    let member: String?
+    @ObservationIgnored private var members: [String: String] = [:]
     private(set) var scrollRequest: (seq: Int, id: Int, anchor: UnitPoint)?
     private(set) var fetching = false
     private(set) var older: [ByreEvent]?
@@ -30,6 +32,7 @@ final class ChatModel {
         self.kind = kind
         self.store = store
         let taskId: String? = if case .task(let id) = kind { id } else { nil }
+        member = taskId.flatMap { store.pickedMember($0) }
         let session: () -> AgentSession? = { [weak store] in
             switch kind {
             case .lead: store?.currentLead()
@@ -82,8 +85,26 @@ final class ChatModel {
         }
     }
 
+    var team: Bool {
+        member != nil
+    }
+
     var placeholder: String {
-        kind == .lead ? "Message your lead. Paste or drop images to attach them." : "Message the agent. Paste or drop images to attach them."
+        if team {
+            return "Post to the team's board; every agent of the team gets it."
+        }
+        return kind == .lead ? "Message your lead. Paste or drop images to attach them." : "Message the agent. Paste or drop images to attach them."
+    }
+
+    private func shows(_ ev: ByreEvent) -> Bool {
+        guard let member, let sid = ev.agentSessionId else {
+            return true
+        }
+        if ev.kind == "session.created" {
+            members[sid] = str(ev.payload.value, "member") ?? ""
+        }
+        let owner = members[sid] ?? store.sessions[taskId ?? ""]?.first { $0.id == sid }?.member ?? ""
+        return owner.isEmpty || owner == member
     }
 
     var empty: String {
@@ -122,7 +143,9 @@ final class ChatModel {
             self?.appended(events)
         })
         offs.append(feed.streamed.add { [weak self] ev in
-            self?.builder.appendDelta(ev)
+            if self?.shows(ev) == true {
+                self?.builder.appendDelta(ev)
+            }
         })
         activeObserver = NotificationCenter.default.addObserver(of: NSApplication.self, for: .didBecomeActive) { [weak self] _ in
             self?.markShown()
@@ -144,7 +167,8 @@ final class ChatModel {
         store.drafts?.flush()
     }
 
-    private func appended(_ events: [ByreEvent]) {
+    private func appended(_ all: [ByreEvent]) {
+        let events = all.filter(shows)
         if events.contains(where: { $0.kind == "agent.tool_result" || $0.kind == "turn.ended" }) {
             unmergedTimer?.cancel()
             unmergedTimer = Task { [weak self] in
@@ -254,6 +278,13 @@ final class ChatModel {
         case .lead:
             _ = try await api.messageLead(body: .json(.init(text: text, images: images, model: sessionId != nil ? model : firstModel))).accepted
         case .task(let id):
+            if team {
+                if images != nil {
+                    throw ApiError(status: 0, message: "The board takes text only; drop the images to post.")
+                }
+                _ = try await api.postToBoard(path: .init(taskId: id ?? ""), body: .json(.init(text: text))).noContent
+                return
+            }
             if let sessionId {
                 _ = try await api.sendMessage(path: .init(sessionId: sessionId), body: .json(.init(text: text, images: images, model: model))).accepted
                 return
@@ -346,8 +377,11 @@ private struct ChatHead: View {
                     }
                 } else {
                     let sess = store.currentSession(task.id)
-                    let busy = sess?.state == .running
+                    let busy = store.taskBusy(task.id)
                     header {
+                        if model.team {
+                            MemberPicker(taskId: task.id, picked: model.member)
+                        }
                         CompactButton(sessionId: sess?.id, state: sess?.state, usage: sess.flatMap { model.builder.context[$0.id] })
                         SyncButton(task: task, busy: busy)
                         Spacer(minLength: 12)
@@ -372,6 +406,23 @@ private struct ChatHead: View {
     }
 }
 
+private struct MemberPicker: View {
+    let taskId: String
+    let picked: String?
+    @Environment(Store.self) private var store
+
+    var body: some View {
+        HStack(spacing: 4) {
+            ForEach(store.team(taskId), id: \.id) { s in
+                PaneTabButton(label: s.state == .running ? "\(s.member) ●" : s.member, active: s.member == picked) {
+                    store.pickedMembers[taskId] = s.member
+                }
+                .help("Show \(s.member)'s transcript (\(s.model.isEmpty ? s.vendor.rawValue : s.model), \(s.state.rawValue))")
+            }
+        }
+    }
+}
+
 private struct SyncButton: View {
     let task: ByreTask
     let busy: Bool
@@ -782,7 +833,7 @@ struct DetailsBox<Summary: View, Content: View>: View {
     }
 }
 
-private struct WhenText: View {
+struct WhenText: View {
     let when: Date
 
     var body: some View {