diff --git a/scripts/gate-bus-bridge.sh b/scripts/gate-bus-bridge.sh
new file mode 100755
index 0000000..3d8dbea
--- /dev/null
+++ b/scripts/gate-bus-bridge.sh
@@ -0,0 +1,105 @@
+#!/bin/bash
+# Polaris ↔ Bus ブリッジ
+#
+# miyabi gate の操作後に miyabi bus を自動呼び出しする。
+# post-commit hook から呼ばれるか、直接呼び出す。
+#
+# Usage:
+#   gate-bus-bridge.sh register <task-id> <title> [--issue N]
+#   gate-bus-bridge.sh complete <task-id>
+#   gate-bus-bridge.sh sync
+
+set -euo pipefail
+
+ACTION="${1:-}"
+TASK_ID="${2:-}"
+TITLE="${3:-}"
+REPO="Miyabi-G-K/miyabi-cli-standalone"
+
+case "$ACTION" in
+  register)
+    # miyabi gate register 後に Bus に自動 enqueue
+    if [ -z "$TASK_ID" ] || [ -z "$TITLE" ]; then
+      echo "Usage: gate-bus-bridge.sh register <task-id> <title>"
+      exit 1
+    fi
+
+    # Issue 番号を抽出
+    ISSUE_NUM=$(echo "$TASK_ID" | grep -oE '[0-9]+' | head -1)
+
+    echo "[Bus Bridge] enqueue: $TASK_ID ($TITLE)"
+    npx miyabi bus enqueue "$TITLE" \
+      --agent "polaris" \
+      --source "miyabi-gate" \
+      --priority "medium" \
+      ${ISSUE_NUM:+--issue "$ISSUE_NUM"} \
+      ${REPO:+--repo "$REPO"} \
+      2>/dev/null && echo "[Bus Bridge] ✅ enqueued" || echo "[Bus Bridge] ⚠️ enqueue failed (non-fatal)"
+    ;;
+
+  complete)
+    # miyabi gate merge 後に Bus の該当タスクを complete
+    if [ -z "$TASK_ID" ]; then
+      echo "Usage: gate-bus-bridge.sh complete <task-id>"
+      exit 1
+    fi
+
+    echo "[Bus Bridge] completing: $TASK_ID"
+
+    # Bus の queue から該当タスクを探す
+    PR_ID=$(npx miyabi bus dispatch --json 2>/dev/null \
+      | python3 -c "
+import sys,json
+try:
+    data = json.load(sys.stdin)
+    for pr in data:
+        if '$TASK_ID' in pr.get('task','') or '$TASK_ID' in pr.get('id',''):
+            print(pr['id'])
+            break
+except: pass
+" 2>/dev/null)
+
+    if [ -n "$PR_ID" ]; then
+      npx miyabi bus complete "$PR_ID" 2>/dev/null \
+        && echo "[Bus Bridge] ✅ completed: $PR_ID" \
+        || echo "[Bus Bridge] ⚠️ complete failed"
+    else
+      echo "[Bus Bridge] ℹ️ task not found in Bus queue (already completed or not enqueued)"
+    fi
+    ;;
+
+  sync)
+    # tasks.json の全タスクを Bus と同期
+    echo "[Bus Bridge] syncing tasks.json → Bus"
+
+    STORE="project_memory/tasks.json"
+    if [ ! -f "$STORE" ]; then
+      echo "[Bus Bridge] ⚠️ tasks.json not found"
+      exit 1
+    fi
+
+    # pending タスクを Bus に enqueue
+    python3 -c "
+import json
+with open('$STORE') as f:
+    data = json.load(f)
+for task in data.get('tasks', []):
+    if task['current_state'] == 'pending':
+        print(f\"{task['id']}|{task['title']}\")
+" 2>/dev/null | while IFS='|' read -r id title; do
+      echo "[Bus Bridge] enqueue: $id ($title)"
+      npx miyabi bus enqueue "$title" \
+        --agent "polaris" \
+        --source "miyabi-gate-sync" \
+        --priority "medium" \
+        2>/dev/null || true
+    done
+
+    echo "[Bus Bridge] ✅ sync complete"
+    ;;
+
+  *)
+    echo "Usage: gate-bus-bridge.sh <register|complete|sync> [args...]"
+    exit 1
+    ;;
+esac