diff --git a/NucleicRemote/NucleicRemote/Views/Transcript/TranscriptProjection.swift b/NucleicRemote/NucleicRemote/Views/Transcript/TranscriptProjection.swift
index bb22f9c..6b1a6ca 100644
--- a/NucleicRemote/NucleicRemote/Views/Transcript/TranscriptProjection.swift
+++ b/NucleicRemote/NucleicRemote/Views/Transcript/TranscriptProjection.swift
@@ -302,7 +302,7 @@ enum TranscriptProjection {
 
     /// Split a scope's events into the main agent's own (`topLevel`) and each subagent's, keyed by
     /// the spawning `Task`'s id.
-    private static func partition(_ events: [AgentEvent])
+    private static func partition(_ events: ArraySlice<AgentEvent>)
         -> (topLevel: [AgentEvent], byParent: [String: [AgentEvent]])
     {
         let parentOf = toolParentMap(events)