diff --git a/.github/workflows/test-install.yml b/.github/workflows/test-install.yml
index 4646a0f0..9e9902e4 100644
--- a/.github/workflows/test-install.yml
+++ b/.github/workflows/test-install.yml
@@ -30,3 +30,4 @@ jobs:
           ./scripts/test-install.sh
           bash scripts/test-install-openclaw-registration.sh
           bash scripts/test-install-link-ownership.sh
+          bash scripts/test-install-parallel-logs.sh
diff --git a/scripts/install.sh b/scripts/install.sh
index 1c6af93b..2bf82c52 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -1726,16 +1726,17 @@ main() {
   local installed=0 t i=0 rc
   local failed=()
   if $use_parallel; then
-    local install_out_dir
+    local install_out_dir install_status=0
     install_out_dir="$(mktemp -d)"
     export AGENCY_INSTALL_OUT_DIR="$install_out_dir"
     export AGENCY_INSTALL_SCRIPT="$SCRIPT_DIR/install.sh"
     export AGENCY_INSTALL_EXTRA="$(worker_flags)"
-    printf '%s\n' "${SELECTED_TOOLS[@]}" | xargs -P "$parallel_jobs" -I {} sh -c 'AGENCY_INSTALL_WORKER=1 "$AGENCY_INSTALL_SCRIPT" --tool "{}" --no-interactive $AGENCY_INSTALL_EXTRA > "$AGENCY_INSTALL_OUT_DIR/{}" 2>&1'
+    printf '%s\n' "${SELECTED_TOOLS[@]}" | xargs -P "$parallel_jobs" -I {} sh -c 'AGENCY_INSTALL_WORKER=1 "$AGENCY_INSTALL_SCRIPT" --tool "{}" --no-interactive $AGENCY_INSTALL_EXTRA > "$AGENCY_INSTALL_OUT_DIR/{}" 2>&1' || install_status=$?
     for t in "${SELECTED_TOOLS[@]}"; do
       [[ -f "$install_out_dir/$t" ]] && cat "$install_out_dir/$t"
     done
     rm -rf "$install_out_dir"
+    [[ "$install_status" -eq 0 ]] || return "$install_status"
     installed=$n_selected
   else
     for t in "${SELECTED_TOOLS[@]}"; do
diff --git a/scripts/test-install-parallel-logs.sh b/scripts/test-install-parallel-logs.sh
new file mode 100755
index 00000000..1d8f000e
--- /dev/null
+++ b/scripts/test-install-parallel-logs.sh
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -euo pipefail
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+scratch="$(mktemp -d)"
+trap 'rm -rf "$scratch"' EXIT
+mkdir -p "$scratch/repo/scripts" "$scratch/repo/engineering" "$scratch/repo/integrations" "$scratch/home"
+cp "$SCRIPT_DIR/install.sh" "$SCRIPT_DIR/lib.sh" "$scratch/repo/scripts/"
+cp "$SCRIPT_DIR/../divisions.json" "$scratch/repo/"
+export HOME="$scratch/home"
+export CLAUDE_CONFIG_DIR="$HOME/.claude" COPILOT_AGENT_DIR="$HOME/.github/agents"
+for agent in first second; do
+  printf '%s\n' '---' "name: $agent" 'description: Example agent' 'color: blue' '---' '# Example agent' > "$scratch/repo/engineering/$agent.md"
+done
+mkdir -p "$scratch/bin" "$scratch/tmp"
+cat > "$scratch/bin/cp" <<'EOF'
+#!/usr/bin/env bash
+if [[ "$*" == *"/.claude/agents/"* && "${FAIL_WORKER:-yes}" == yes ]]; then
+  echo 'fixture worker copy failed' >&2
+  exit 47
+fi
+exec /bin/cp "$@"
+EOF
+chmod +x "$scratch/bin/cp"
+export PATH="$scratch/bin:$PATH" TMPDIR="$scratch/tmp"
+expected_status=0
+printf 'failure\n' | xargs -P 2 -I {} sh -c 'exit 47' || expected_status=$?
+status=0
+bash "$scratch/repo/scripts/install.sh" --tool claude-code,copilot --division engineering \
+  --no-convert --parallel --jobs 2 > "$scratch/failure.log" 2>&1 || status=$?
+[[ "$status" == "$expected_status" && "$status" != 0 ]] || { cat "$scratch/failure.log"; echo "FAIL: worker failure status changed: $status"; exit 1; }
+grep -q 'fixture worker copy failed' "$scratch/failure.log" || {
+  echo 'FAIL: buffered worker failure is hidden' >&2; exit 1;
+}
+[[ -f "$HOME/.github/agents/first.md" ]]
+! grep -q 'Done!  Installed' "$scratch/failure.log"
+[[ -z "$(ls -A "$scratch/tmp")" ]] || { echo 'FAIL: worker output directory leaked'; exit 1; }
+export FAIL_WORKER=no
+bash "$scratch/repo/scripts/install.sh" --tool claude-code,copilot --division engineering \
+  --no-convert --parallel --jobs 2 > "$scratch/success.log" 2>&1
+grep -q 'Done!  Installed 2 tool(s)' "$scratch/success.log"
+[[ -f "$HOME/.claude/agents/first.md" ]]
+[[ -z "$(ls -A "$scratch/tmp")" ]]
+echo 'PASS: failed parallel worker logs are replayed, status is preserved, and buffers are removed'