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fix: scope Stop hook to agent-loop tmux session only

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The Stop hook (kill -INT $PPID) was written to the project's
settings.local.json, causing ANY Claude Code session in the same project
to kill its parent shell on exit — not just the loop's sessions.

Now the hook checks tmux session name before firing: only CC sessions
inside the "agent-loop" tmux session trigger the kill. Other CC sessions
in the same project are unaffected.
This commit is contained in:
Sheldon Finlay
2026-04-02 08:17:15 -04:00
parent ad58a49182
commit 1bd8004854
1 changed files with 13 additions and 3 deletions
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16
lib/hooks.sh
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@@ -7,9 +7,17 @@
# #
# Without this hook, claude would exit to an interactive prompt instead of # Without this hook, claude would exit to an interactive prompt instead of
# returning control to the loop script. # returning control to the loop script.
#
# IMPORTANT: The hook is scoped to only fire inside the agent-loop tmux session.
# Without this guard, ANY Claude Code session opened in the same project directory
# would pick up the hook and kill its own parent shell on exit.
SETTINGS_FILE="${PROJECT_ROOT}/.claude/settings.local.json" SETTINGS_FILE="${PROJECT_ROOT}/.claude/settings.local.json"
# The hook command checks we're inside the agent-loop tmux session before killing.
# This prevents the hook from affecting other CC sessions open in the same project.
HOOK_COMMAND='tmux display-message -p "#{session_name}" 2>/dev/null | grep -q "^agent-loop$" && kill -INT $PPID || true'
install_hooks() { install_hooks() {
if [ ! -f "$SETTINGS_FILE" ]; then if [ ! -f "$SETTINGS_FILE" ]; then
mkdir -p "$(dirname "$SETTINGS_FILE")" mkdir -p "$(dirname "$SETTINGS_FILE")"
@@ -17,14 +25,16 @@ install_hooks() {
fi fi
if command -v jq &>/dev/null; then if command -v jq &>/dev/null; then
jq '.hooks.Stop = [{"matcher": "", "hooks": [{"type": "command", "command": "kill -INT $PPID || true"}]}]' \ jq --arg cmd "$HOOK_COMMAND" \
'.hooks.Stop = [{"matcher": "", "hooks": [{"type": "command", "command": $cmd}]}]' \
"$SETTINGS_FILE" > "${SETTINGS_FILE}.tmp" && mv "${SETTINGS_FILE}.tmp" "$SETTINGS_FILE" "$SETTINGS_FILE" > "${SETTINGS_FILE}.tmp" && mv "${SETTINGS_FILE}.tmp" "$SETTINGS_FILE"
else else
LOOP_SETTINGS="$SETTINGS_FILE" python3 -c " LOOP_HOOK_CMD="$HOOK_COMMAND" LOOP_SETTINGS="$SETTINGS_FILE" python3 -c "
import json, os import json, os
p = os.environ['LOOP_SETTINGS'] p = os.environ['LOOP_SETTINGS']
cmd = os.environ['LOOP_HOOK_CMD']
s = json.load(open(p)) if os.path.exists(p) else {} s = json.load(open(p)) if os.path.exists(p) else {}
s.setdefault('hooks', {})['Stop'] = [{'matcher': '', 'hooks': [{'type': 'command', 'command': 'kill -INT \$PPID || true'}]}] s.setdefault('hooks', {})['Stop'] = [{'matcher': '', 'hooks': [{'type': 'command', 'command': cmd}]}]
json.dump(s, open(p, 'w'), indent=2) json.dump(s, open(p, 'w'), indent=2)
" "
fi fi