Simplify codebase per audit of 8b89f14

mac/Sources/Byre/Format.swift

@@ -168,16 +168,17 @@ func isoText(_ date: Date) -> String {
 extension Snapshot {
     var reason: String {
         switch trigger {
-        case .message: "agent message"
         case .turnEnd: "turn ended"
-        case .toolCall: "tool call"
         case .askHuman: "question asked"
-        case .timer: "periodic snapshot"
         case .requested: "snapshot requested"
         case .answer: "before delivering an answer"
         case .fork: "before forking"
         }
     }
+
+    var isCutPoint: Bool {
+        [.answer, .fork, .askHuman].contains(trigger)
+    }
 }
 
 func clockText(_ d: Date) -> String {

mac/Sources/Byre/Store.swift

@@ -851,7 +851,7 @@ final class Store {
         case "schedule.saved", "schedule.deleted":
             applySchedule(ev)
         case "task.created", "task.title", "task.merge_title", "task.merge_queued", "task.merge_unqueued", "task.merge_after_review", "task.merge_after_review_ended", "task.merge_after_review_canceled", "task.parent_merge_started", "task.parent_merge_stopped", "task.merge_started", "task.merge_ended", "task.discard_started", "task.merged", "task.discarded", "task.state", "task.ready", "task.discard_suggested", "task.ready_cleared", "snapshot.created":
-            if let taskId = ev.taskId, ["task.merged", "task.discarded"].contains(ev.kind) || (ev.kind == "snapshot.created" && !["answer", "fork", "ask_human"].contains(str(ev.payload.value, "trigger"))) {
+            if let taskId = ev.taskId, ["task.merged", "task.discarded"].contains(ev.kind) || (ev.kind == "snapshot.created" && (try? decodePayload(ev.payload, as: Snapshot.self))?.isCutPoint != true) {
                 clearTask(self, taskId)
             }
             if let taskId = ev.taskId, ["task.merged", "task.discarded"].contains(ev.kind) {

mac/Sources/Byre/TranscriptBuilder.swift

@@ -528,7 +528,7 @@ final class TranscriptBuilder {
             if ev.kind == "snapshot.created" {
                 ctx.run = nil
                 let snap = try! decodePayload(ev.payload, as: Snapshot.self)
-                if ![.answer, .fork, .askHuman].contains(snap.trigger) && sink == nil && own {
+                if !snap.isCutPoint && sink == nil && own {
                     lastReady = nil
                 }
                 release()