diff --git a/my-tools/run_web_product_migration.py b/my-tools/run_web_product_migration.py
index 227260dfc..ff3f89e58 100644
--- a/my-tools/run_web_product_migration.py
+++ b/my-tools/run_web_product_migration.py
@@ -199,6 +199,8 @@ Rules:
 - Preserve all existing dirty changes. Do not revert or rewrite unrelated work.
 - Read only the owned paths and their direct imported types/helpers.
 - For scoped searches, pass each owned path explicitly through the batch search runtime option; never pass a bare --runtime flag.
+- Hard budget: at most 16 tool commands, including at most 8 read/search commands. After the read budget, implement immediately.
+- Do not print or reread the complete diff; inspect only the edited regions once before writing the result.
 - Implement production behavior through the existing Blender Main/WASM command routes; do not simulate Blender behavior in JavaScript.
 - Do not run tests, builds, typecheck, lint, Chromium, full validators, or coverage binding. The user explicitly deferred verification to real usage.
 - Do not modify docs/EXECUTION_QUEUE.md, nextTask.md, source coverage ledgers, manifests, or this backlog.
@@ -220,6 +222,8 @@ def run_task(task: dict, heartbeat_seconds: float) -> tuple[int, bool]:
         "--ephemeral", "--cd", str(ROOT), "--json", "-",
     ]
     completed_turn = False
+    result_seen_at: float | None = None
+    task_started_at = time.monotonic()
     with log_path.open("w", encoding="utf-8") as log:
         process = subprocess.Popen(
             command,
@@ -238,6 +242,8 @@ def run_task(task: dict, heartbeat_seconds: float) -> tuple[int, bool]:
             write_status(read_json(BACKLOG), "implementing", activeTask=task["id"], childPid=process.pid, log=str(log_path.relative_to(ROOT)))
             log.flush()
             if result_path.is_file():
+                if result_seen_at is None:
+                    result_seen_at = time.monotonic()
                 try:
                     with log_path.open("rb") as current_log:
                         end = current_log.seek(0, os.SEEK_END)
@@ -245,6 +251,8 @@ def run_task(task: dict, heartbeat_seconds: float) -> tuple[int, bool]:
                         completed_turn = b'"type":"turn.completed"' in current_log.read()
                 except OSError:
                     completed_turn = False
+                if time.monotonic() - result_seen_at >= 5:
+                    completed_turn = True
             if completed_turn:
                 try:
                     os.killpg(process.pid, signal.SIGTERM)
@@ -255,6 +263,16 @@ def run_task(task: dict, heartbeat_seconds: float) -> tuple[int, bool]:
                     os.killpg(process.pid, signal.SIGKILL)
                     process.wait()
                 break
+            if time.monotonic() - task_started_at >= 900:
+                try:
+                    os.killpg(process.pid, signal.SIGTERM)
+                    process.wait(timeout=5)
+                except ProcessLookupError:
+                    pass
+                except subprocess.TimeoutExpired:
+                    os.killpg(process.pid, signal.SIGKILL)
+                    process.wait()
+                break
             time.sleep(heartbeat_seconds)
         code = 0 if completed_turn else (process.returncode or 0)
         ACTIVE_PROCESS = None
diff --git a/tools/web/search-wbv2-batch-source.mjs b/tools/web/search-wbv2-batch-source.mjs
index 57a698ca6..5ef59c0a3 100644
--- a/tools/web/search-wbv2-batch-source.mjs
+++ b/tools/web/search-wbv2-batch-source.mjs
@@ -11,6 +11,10 @@ const arg = (name, fallback = null) => {
   const index = process.argv.indexOf(name);
   return index >= 0 ? process.argv[index + 1] : fallback;
 };
+if (process.argv.includes("--help")) {
+  process.stdout.write("usage: node tools/web/search-wbv2-batch-source.mjs [--task <task-id>] --pattern <text> [--runtime <path> ...] or --list\n");
+  process.exit(0);
+}
 const task = arg("--task") ?? read("docs/EXECUTION_QUEUE.md").match(/\| 当前任务 \| `([^`]+)` \|/u)?.[1];
 const pattern = arg("--pattern");
 if (!task) throw new Error("unable to resolve current WBV2 task");