diff --git a/text7.txt b/text7.txt
index 5ff4d3c..0141fd9 100644
--- a/text7.txt
+++ b/text7.txt
@@ -1559,3 +1559,70 @@ semantics。
 ```bash
 git status --short && git log -5 --oneline && tail -n 120 text7.txt && awk '/^[一二三四五六七八九十百]+、/ {print}' text7.txt | sort | uniq -d
 ```
+
+二十七、2026-06-13 继续执行记录：OPFS snapshot staging guard
+
+1. 本批目标。
+
+继续 staged path guard inventory 第二十二轮，处理 OPFS session snapshot storage
+path：
+
+```text
+linuxcnc/sessions/session-1/snapshot.json
+linuxcnc/sessions/session-1/custom-snapshot.json
+```
+
+2. 已完成改动。
+
+- Node OPFS smoke 新增 `assertSessionSnapshotStoragePath(...)`；
+- `sessionSnapshotPath(...)` 的默认 snapshot 与 custom snapshot 路径改为走专用 path
+  guard；
+- `saveSessionSnapshot(...)` 的默认 snapshot 与 custom snapshot 后增加 path guard；
+- `loadSessionSnapshot(...)` 的 snapshot 内容验证保持不变；
+- invalid snapshot filename、bad JSON、bad format/version/session-id rejection 验证保持
+  不变；
+- 未修改 OPFS file-service、snapshot schema、snapshot-store、path-model 或 session
+  runtime semantics。
+
+涉及文件：
+
+```text
+wasm-port/tests/opfs/node/verify_file_service.mjs
+```
+
+3. 已完成的目标验证。
+
+```bash
+git diff --check
+wasm-port/tests/opfs/node/verify_file_service.sh
+```
+
+4. 本批剩余建议验证。
+
+```bash
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_interp_browser.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+如果通过，提交建议：
+
+```text
+Guard OPFS snapshot staging
+```
+
+5. 下一步工作建议。
+
+继续 staged path guard inventory 第二十三轮，优先扫描 OPFS preview-cache path 边界，
+例如 `previewCachePath(...)` 与 `linuxcnc/preview-cache/<cache>/preview.json` 或 custom
+preview filename 对账；仍只加 filesystem/OPFS path guard，不改变 preview cache、
+file-service 或 runtime semantics。
+
+下一轮第一条命令仍保持：
+
+```bash
+git status --short && git log -5 --oneline && tail -n 120 text7.txt && awk '/^[一二三四五六七八九十百]+、/ {print}' text7.txt | sort | uniq -d
+```
diff --git a/wasm-port/tests/opfs/node/verify_file_service.mjs b/wasm-port/tests/opfs/node/verify_file_service.mjs
index 34eb24d..42beb2a 100644
--- a/wasm-port/tests/opfs/node/verify_file_service.mjs
+++ b/wasm-port/tests/opfs/node/verify_file_service.mjs
@@ -103,6 +103,14 @@ function assertGcodeProgramStoragePath(filename, path) {
   );
 }
 
+function assertSessionSnapshotStoragePath(sessionId, path, filename = "snapshot.json") {
+  assert.equal(
+    path,
+    `linuxcnc/sessions/${sessionId}/${filename}`,
+    `${sessionId}/${filename} session snapshot OPFS path drift`,
+  );
+}
+
 assert.equal(await getOpfsRoot(storage), root);
 
 assert.equal(normalizeOpfsPath("linuxcnc/machines/xyzab.ini"), "linuxcnc/machines/xyzab.ini");
@@ -115,10 +123,14 @@ assertGcodeProgramStoragePath(
   gcodeProgramPath("custom-fixture.ngc"),
 );
 assert.equal(previewCachePath("fixture"), "linuxcnc/preview-cache/fixture/preview.json");
-assert.equal(sessionSnapshotPath("session-1"), "linuxcnc/sessions/session-1/snapshot.json");
-assert.equal(
+assertSessionSnapshotStoragePath(
+  "session-1",
+  sessionSnapshotPath("session-1"),
+);
+assertSessionSnapshotStoragePath(
+  "session-1",
   sessionSnapshotPath("session-1", "custom-snapshot.json"),
-  "linuxcnc/sessions/session-1/custom-snapshot.json",
+  "custom-snapshot.json",
 );
 assert.deepEqual(defaultMachinePaths("xyzab-tdr"), {
   ini: "linuxcnc/machines/xyzab-tdr/machine.ini",
@@ -182,6 +194,10 @@ await saveSessionSnapshot("session-1", snapshotPayload, {
   createdAt: "2026-06-08T00:00:00.000Z",
   metadata: { source: "node-smoke" },
 });
+assertSessionSnapshotStoragePath(
+  "session-1",
+  sessionSnapshotPath("session-1"),
+);
 assert.deepEqual(await loadSessionSnapshot("session-1", { storage }), snapshot);
 const customSnapshot = await saveSessionSnapshot("session-1", snapshotPayload, {
   storage,
@@ -189,6 +205,11 @@ const customSnapshot = await saveSessionSnapshot("session-1", snapshotPayload, {
   createdAt: "2026-06-08T00:00:00.000Z",
   metadata: { source: "node-smoke-custom" },
 });
+assertSessionSnapshotStoragePath(
+  "session-1",
+  sessionSnapshotPath("session-1", "custom-snapshot.json"),
+  "custom-snapshot.json",
+);
 assert.equal(
   customSnapshot.metadata.source,
   "node-smoke-custom",