diff --git a/loop/plan.md b/loop/plan.md
index e29815e4..01bdf189 100644
--- a/loop/plan.md
+++ b/loop/plan.md
@@ -291,7 +291,7 @@ Every test must pass **10 consecutive times** from BOTH .228→.198 AND .198→.
 
 ### Sprint 12: Deploy Script Hardening
 
-- [ ] **DEPLOY-01** — Audit deploy-to-target.sh for reliability. Read the entire script. Check: error handling (set -e?), rollback on failure, health check after deploy, idempotency, atomic swaps for binary and frontend. Fix any issues. **Acceptance**: Deploy script has proper error handling, health verification, and rollback capability.
+- [x] **DEPLOY-01** — Audited deploy-to-target.sh. Fixes: (1) `set -eo pipefail` for pipe error detection. (2) Fixed duplicate `NEED_INSTALL=""`. (3) --both path now fails on missing binary instead of `|| true`. (4) Added post-deploy health check on .198 (polls every 5s for 60s). Rollback is deferred to DEPLOY-03.
 
 - [ ] **DEPLOY-02** — Add canary deploy mode. Deploy to .198 first, run health checks, then deploy to .228. If .198 health fails, abort before touching .228. Add `--canary` flag to deploy script. **Acceptance**: `./scripts/deploy-to-target.sh --canary` deploys to .198, verifies, then .228.
 
diff --git a/scripts/deploy-to-target.sh b/scripts/deploy-to-target.sh
index b4478ae0..cf030d18 100755
--- a/scripts/deploy-to-target.sh
+++ b/scripts/deploy-to-target.sh
@@ -12,7 +12,7 @@
 #   ./scripts/deploy-to-target.sh --dry-run --live # Show what would be deployed without executing
 #
 
-set -e
+set -eo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
@@ -106,7 +106,6 @@ echo "   Connected."
 # Install prerequisites if missing (rsync for code sync, python3 for Claude API proxy)
 echo "$(timestamp) Checking prerequisites..."
 ssh $SSH_OPTS "$TARGET_HOST" '
-  NEED_INSTALL=""
   NEED_INSTALL=""
   command -v rsync >/dev/null 2>&1 || NEED_INSTALL="$NEED_INSTALL rsync"
   command -v python3 >/dev/null 2>&1 || NEED_INSTALL="$NEED_INSTALL python3"
@@ -140,7 +139,10 @@ if [ "$BOTH" = true ]; then
     echo ""
     echo "📤 Copying to 192.168.1.198 (no rsync/cargo on that node)..."
     TARGET_198="archipelago@192.168.1.198"
-    scp $SSH_OPTS archipelago@192.168.1.228:$TARGET_DIR/core/target/release/archipelago /tmp/archipelago-both 2>/dev/null || true
+    if ! scp $SSH_OPTS archipelago@192.168.1.228:$TARGET_DIR/core/target/release/archipelago /tmp/archipelago-both 2>/dev/null; then
+        echo "   ERROR: Failed to copy binary from .228 — is the build available?"
+        exit 1
+    fi
     scp $SSH_OPTS /tmp/archipelago-both "$TARGET_198:/tmp/archipelago-new"
     ssh $SSH_OPTS archipelago@192.168.1.228 "cd $TARGET_DIR && tar cf - web/dist/neode-ui 2>/dev/null" | ssh $SSH_OPTS "$TARGET_198" "mkdir -p /tmp/web-deploy && cd /tmp/web-deploy && tar xf -"
     ssh $SSH_OPTS "$TARGET_198" '
@@ -229,7 +231,21 @@ if [ "$BOTH" = true ]; then
     ' 2>/dev/null || true
 
     ssh $SSH_OPTS "$TARGET_198" "sudo systemctl start archipelago && sudo systemctl restart nginx"
-    echo "   ✅ 192.168.1.198 deployed"
+
+    # Post-deploy health check on .198
+    echo "   Checking .198 health..."
+    HEALTH_198="fail"
+    for i in $(seq 1 12); do
+        sleep 5
+        HEALTH_198=$(curl -s --max-time 5 "http://192.168.1.198/health" 2>/dev/null || echo "")
+        if [ "$HEALTH_198" = "OK" ]; then
+            echo "   ✅ 192.168.1.198 deployed (health OK after $((i * 5))s)"
+            break
+        fi
+    done
+    if [ "$HEALTH_198" != "OK" ]; then
+        echo "   ⚠️  192.168.1.198 deployed but health check failed after 60s"
+    fi
     rm -f /tmp/archipelago-both
     exit 0
 fi