From 2a98a02218170cefe66013d0f65607fa56358de8 Mon Sep 17 00:00:00 2001
From: Shashank Deshpande <croshank@mit.edu>
Date: Sun, 29 Mar 2026 22:39:21 -0400
Subject: [PATCH] Add 150ms tail buffer after Fn release to avoid clipping last
 word

When the user releases Fn, audio capture now continues for 150ms
before stopping. This prevents the final word from being cut off
mid-utterance, which happens because key-up fires before the
speaker's articulatory gesture is complete.
---
 MiniflowApp/MiniflowApp/ViewModels/AgentViewModel.swift | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/MiniflowApp/MiniflowApp/ViewModels/AgentViewModel.swift b/MiniflowApp/MiniflowApp/ViewModels/AgentViewModel.swift
index 66b6e3a..d9e61cc 100644
--- a/MiniflowApp/MiniflowApp/ViewModels/AgentViewModel.swift
+++ b/MiniflowApp/MiniflowApp/ViewModels/AgentViewModel.swift
@@ -153,12 +153,14 @@ final class AgentViewModel: ObservableObject {
         guard isListening else { return }
         isListening = false
         keyReleaseTime = Date()
-        audio.onChunk = nil
 
         if let start = listeningStartTime, let release = keyReleaseTime {
             lastAudioLengthSecs = release.timeIntervalSince(start)
         }
 
+        // Keep capturing briefly after key release so the last word isn't clipped
+        try? await Task.sleep(nanoseconds: 150_000_000)
+        audio.onChunk = nil
         audio.stopCapture()
 
         do {