From 577f10c46436dbbc5efa814f8a2f64737d4c3db4 Mon Sep 17 00:00:00 2001
From: Murat Aslan <murataslan1@users.noreply.github.com>
Date: Tue, 7 Apr 2026 15:20:23 +0300
Subject: [PATCH] fix: emit empty hookSpecificOutput in PostToolUse to prevent
 false hook error

PostToolUse hook exits 0 but outputs nothing to stdout. Claude Code
interprets empty stdout as a hook failure and shows "hook error" on
every tool call (TaskUpdate, TaskCreate, etc.), even though the hook
ran successfully.

Output empty {"hookSpecificOutput":{}} so Claude Code recognizes the
hook completed without error. This is a workaround for CC #41868.

Closes #229
---
 hooks/posttooluse.mjs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hooks/posttooluse.mjs b/hooks/posttooluse.mjs
index ead71b78..3289829b 100755
--- a/hooks/posttooluse.mjs
+++ b/hooks/posttooluse.mjs
@@ -53,4 +53,5 @@ try {
   // PostToolUse must never block the session — silent fallback
 }
 
-// PostToolUse hooks don't need hookSpecificOutput
+// Emit empty hookSpecificOutput so Claude Code doesn't show false "hook error" (CC #41868).
+process.stdout.write(JSON.stringify({ hookSpecificOutput: {} }) + "\n");