Pi's ACP binary streams 200+ redundant tool_call_update events per tool call,
bypassing the server coalescer and flooding the app with synchronous state
updates. Two-layer fix:
Server: extend AgentStreamCoalescer to handle tool_call items via last-write-wins
per callId (200ms window, up from 33ms). Terminal statuses flush immediately.
App: mergeToolCallDetail and appendAgentToolCall now return existing references
when fields are unchanged, preserving React.memo equality checks.
Mohamed Boudra
5a232d8cf1