diff --git a/Agent.md b/Agent.md
index 70597a9..1c53518 100644
--- a/Agent.md
+++ b/Agent.md
@@ -93,7 +93,7 @@ Community needs voiced in HN agent-UI discussions map directly to EMRG's design:
 pkill -f "emrg.server"; rm -f ~/.emrg/emrgd.port; python -m emrg
 ```
 
-Python: `uv run pytest tests/ -v` (674) — import check: `uv run python -c "from emrg.client.app import run_client"`
+Python: `uv run pytest tests/ -v` (675) — import check: `uv run python -c "from emrg.client.app import run_client"`
 GUI: `cd emrg/gui && npm test` (111: 29 daemon_client + 22 app-commands + 32 renderer smoke + 15 i18n + 7 integration + 3 commands + 3 build-config) — syntax: `node --check main.js preload.js daemon_client.js renderer/js/*.js`
 CI: `uv run pytest` + GUI tests + **actionlint workflow lint** (`rhysd/actionlint@v1.7.12` gate, #444 — workflow 解析错误在 PR CI 即失败，如 `if:` secrets 上下文)
 Re-trigger: `scripts/re-trigger-ci.sh [branch]` (workflow_dispatch, #527 — 替代空 commit 重触发：Actions outage 会整段丢弃 push 事件，dispatch 走 API 路径不受影响)
diff --git a/README.cn.md b/README.cn.md
index 58a9e26..ee0e61d 100644
--- a/README.cn.md
+++ b/README.cn.md
@@ -274,7 +274,7 @@ EMRG 不只是追赶——它自己追上来。
 git clone https://github.com/argszero/emrg.git
 cd emrg
 uv sync              # 安装依赖
-uv run pytest tests/ -v   # 跑测试（当前 674 项）
+uv run pytest tests/ -v   # 跑测试（当前 675 项）
 uv run python -m emrg     # 启动 TUI
 # CI 含 actionlint workflow 门禁（#444）：workflow 解析错误在 PR 即失败
 
@@ -283,7 +283,6 @@ cd emrg/gui
 npm ci               # 安装依赖（生产模式可 --omit=dev）
 npm start            # 启动 GUI（自动拉起 daemon）
 npm test             # 运行 Node 测试（111 项：29 daemon_client + 22 app-commands + 32 renderer smoke + 15 i18n + 7 integration + 3 commands + 3 build-config；集成测试在 CI 跑，本地可 npm run test:integration）
-npm test             # 运行 Node 测试（111 项：29 daemon_client + 22 app-commands + 32 renderer smoke + 15 i18n + 7 integration + 3 commands + 3 build-config；集成测试在 CI 跑，本地可 npm run test:integration）
 ```
 
 CI 通过 GitHub Actions 自动运行测试并检查冲突标记（`.github/workflows/test.yml`）。
diff --git a/README.md b/README.md
index c100c6b..244c06c 100644
--- a/README.md
+++ b/README.md
@@ -273,7 +273,7 @@ EMRG doesn't just keep up — it catches up on its own.
 git clone https://github.com/argszero/emrg.git
 cd emrg
 uv sync              # install deps
-uv run pytest tests/ -v   # run tests (currently 674 items)
+uv run pytest tests/ -v   # run tests (currently 675 items)
 uv run python -m emrg     # launch TUI
 # CI includes actionlint workflow gate (#444): workflow parse errors fail PR CI
 
diff --git a/tests/test_doc_counts.py b/tests/test_doc_counts.py
index b148a40..29dcff5 100644
--- a/tests/test_doc_counts.py
+++ b/tests/test_doc_counts.py
@@ -84,3 +84,25 @@ def test_gui_breakdown_sums_to_headline() -> None:
         assert sum(parts) == headline, (
             f"{label}: breakdown {parts} sums to {sum(parts)} but headline says {headline}"
         )
+
+
+def test_no_duplicate_npm_test_command_lines() -> None:
+    """Each doc must not contain an identical `npm test` command line twice.
+
+    #617: README.cn.md carried the `npm test` line twice (exact copy-paste
+    duplicate). The breakdown-sum guard above passed because it validates
+    each line independently — both copies sum correctly to the same
+    headline. Exact-line duplicates within one doc are always a copy-paste
+    bug: README.md has one line, README.cn.md must have one, Agent.md has
+    two *different* lines (features + test-commands sections), never an
+    identical repeat.
+    """
+    for doc in ("README.md", "README.cn.md", "Agent.md"):
+        text = (REPO_ROOT / doc).read_text(encoding="utf-8")
+        lines = [ln.rstrip() for ln in text.splitlines() if "npm test" in ln]
+        dupes = {ln for ln in lines if lines.count(ln) > 1}
+        assert not dupes, (
+            f"{doc} contains duplicated npm-test command line(s) — remove the "
+            f"copy-paste duplicate: {dupes}"
+        )
+