From e8cd37674169499f281bf6110efd430d2c443887 Mon Sep 17 00:00:00 2001
From: David F Glidden <d@davidglidden.eu>
Date: Mon, 27 Jul 2026 22:15:06 +0200
Subject: [PATCH] fix(drift-check): handle SIGPIPE so `| head` does not
 traceback

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Xefg5EXwcpd9RMAr63dWrD
---
 scripts/governance-drift-check.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/scripts/governance-drift-check.py b/scripts/governance-drift-check.py
index 738fc29..1189d5c 100755
--- a/scripts/governance-drift-check.py
+++ b/scripts/governance-drift-check.py
@@ -18,11 +18,17 @@ report, not a gate.
 import json
 import os
 import re
-import subprocess
+import signal
 import sys
 from datetime import date
 from pathlib import Path
 
+# Report cleanly when the reader closes early (`| head`), rather than tracebacking.
+try:
+    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
+except (AttributeError, ValueError):  # not POSIX, or not on the main thread
+    pass
+
 HOME = Path.home()
 CLAUDE_MD = HOME / "dotfiles" / "CLAUDE.md"
 MONTHS = ("january february march april may june july august september "